Rotary cutting tool with body shaped as tilted cone

FIELD: construction.

SUBSTANCE: group of inventions relates to the field of mining and construction, in particular, to rotary cutting tool, which may be used to pierce through thickness of soil. Rotary cutting tool includes body, which has axial front end and axial back end, and also axial length. Hard tip, which has remote end, is fixed to body of cutting tool at its axial front end. Body of cutting tool has a section of back surface, arranged along axis behind remote end of hard tip, and having transverse dimension. Section of back surface includes axial front transverse dimension and minimum transverse dimension, which is located along axis behind axial front transverse dimension. Axial front dimension exceeds minimum transverse dimension. Section of back surface has axial length within the limits from approximately 10% to 35% of axial length of cutting tool body.

EFFECT: improvement of rotary cutting tool, to reduce extent of resistance of rotary cutting tool when piercing through soil thickness, with small angle of separation.

32 cl, 9 dwg

 

Prerequisites to the creation of inventions

The present invention relates to rotary cutting tools, which can be used for punching of soil strata, such as asphalt roads, coal seams, mineral deposits, etc. More specifically, the present invention relates to rotary cutting tools, which can be used for punching of soil strata and which has a high-strength housing and configuration that provides improved performance characteristics of rotary cutting tools.

Still rotating cutting tool used for punching of soil strata, such as asphalt roads. Such rotary cutting tools contain elongated casing, usually made of steel, and a solid tip or plug inserts), attached to the body of the cutting tool at its axial front end. Solid tip is usually made of hard material, such as cemented (cobalt) tungsten carbide. Rotating the cutting tool is held or secured rotatably in the bore of the tool holder or, in the alternative, in the bore of the sleeve, which in turn is fixed in the hole from the rear side is I.

The holder is attached to the drive element, for example, such as a drive pulley machine for leveling roads. In some embodiments, the slave element (e.g., drum) contains hundreds of holders, each of which has a rotating cutting tool. Therefore, the drive element can contain hundreds of rotating cutting tools. Drive pulley is driven (e.g., rotated) so that the solid tip of each rotary cutting tool was broken or had a shock effect on the thickness of the soil (e.g., asphalt road surface), thereby destroying and breaking up the material into small pieces.

Especially when working on leveling roads, in which a rotating cutting tools cut the asphalt, the so-called angle of separation (which is sometimes called the angle of fracture) compared with other more brittle materials, such as coal. In this regard, we can determine the angle of separation as the angle between the Central longitudinal axis of the rotating cutting tool and a plane, which is usually located on the surface of the destruction of the chip or fragment.

When breaking materials such as asphalt, in which the angle of separation is small, the contact area between the rotating cutting tool, in particular a case of cutting the tools, the asphalt increases. This increase in the lateral zone of contact has at least two consequences.

One such implication is that the increase in the contact zone increases the resistance to the advancement of rotating through the asphalt, which, therefore, requires increasing the capacity of the drive pulley. Even if there is a possibility of increasing the capacity of the drive pulley, this increase raises the cost of the machine itself, as well as the cost of operating the machine for leveling roads. Thus, it becomes clear that there is an urgent need to establish an improved rotary cutting tool that can be used for punching of soil strata in which there is no need to increase the capacity of the drive pulley to ensure satisfactory operation when obtaining a material having a small angle of separation. Along with this there is a need for the creation of an improved rotary cutting tool having such a configuration, in order to reduce the degree of resistance of the rotating cutting tool for breaking down of soil strata, especially when this tool is used for punching of materials such as asphalt, halite, natural gypsum, feldspar, or throne, which have a small angle of separation./p>

Other specified consequence is that this increase in the contact zone increases abrasive wear of rotary and especially abrasive wear steel cutting tools. The plot of this wear on the steel cutting tool in some cases, it may be near its axial front end that pose a risk to the integrity of the solder joints between the solid tip and steel body of the cutting tool. Premature destruction of the solder joints between the solid tip and tool body usually leads to the loss of hard tip, which actually means the completion of the operation of the rotary cutting tool. The loss of hard tip is usually also reduce the overall efficiency of use of the machine for levelling the road.

Thus, it becomes clear that there is an urgent need to establish an improved rotary cutting tool, comprising a housing having a configuration that reduces the degree of abrasive wear of the housing during operation and, especially, the degree of abrasive wear on the body when breaking materials such as asphalts that have a small angle of separation. It is also becoming clear that there is a critical need in creating the perfect the data of a rotating cutting tool, which includes a housing having such a configuration that improves or enhances the protection of soldered connections between the solid tip and the housing during operation and especially during the breaking down of materials such as asphalt, which have a small angle of separation.

In addition to abrasive wear, which is subjected to a rotating cutting tool (and especially his case) when using the machine for levelling the road (or in other applications in which a rotating cutting tool penetrates the thickness of the soil), there is considerable tension acting on the rotating cutting tool, including housing. If the body does not have sufficient strength, there is a risk of premature destruction. Such premature destruction of the body is undesirable result, which usually leads to the end of operation, rotating cutting tool and reduce the efficiency of operation of the machine, such as a machine for leveling roads. Thus, there is an urgent need to establish an improved rotary cutting tool having a body with sufficient strength to reduce the likelihood of premature destruction of the body.

Brief description of the invention

In accordance with one aspect of the present invention to provide which enables a rotating cutting tool, including a body having an axial forward end and an axial rear end. The housing has an axial length. Solid tip which has a remote end that is attached to the housing at its axial front end. The housing contains a plot of the rear surface located on an axis at the remote end of the rigid tip, and the area of the rear surface has a transverse size. The area of the rear surface includes an axial front transverse dimension and a minimum transverse dimension that is on the axis at the axial front cross-sectional dimension. Axial front size exceeds the minimum transverse dimension. The area of the rear surface has an axial length in the range from about 10% to 35% of the axial length of the body.

In accordance with another aspect of the present invention is a rotatable cutting tool having a housing, comprising an axial forward end and an axial rear end. The housing has an axial length. Solid tip is attached to the housing at its axial front end. The frame includes an intermediate section of the site and a back surface located on the axis in front of the intermediate section. The area of the rear surface has a transverse size. The transverse size of the area of the rear surface is reduced in the axial rear direction. The area of the rear surface has an axial length is in the range from about 10% to 35% of the axial length of the body of the cutting tool.

In accordance with another aspect of the present invention represents the body of the cutting tool for use with solid tip. The body of the cutting tool includes an axial forward end and an axial rear end. The housing has an axial length. The housing contains a plot of the back surface having a transverse dimension, which includes the axial front transverse dimension and a minimum transverse dimension that is on the axis at the axial front cross-sectional dimension. Axial front size exceeds the minimum transverse dimension. The area of the rear surface has an axial length in the range from about 10% to 35% of the axial length of the body of the cutting tool.

Brief description of drawings

Below is a brief description of the drawings, which form part of this application.

Figure 1 depicts a side view of a particular case for a rotating cutting tool, located in the Central channel of the tool holder (or block)that is attached to the surface of the drive element (e.g., drum) and in which the block is cut so that the open axial rear element rotating in the channel of the holder.

Figure 2 depicts a schematic view of the steel billet, bending punch and segmental matrices for cold forming axial front cor the USA in accordance with a specific embodiment of a rotating cutting tool, illustrated in figure 1, and in which the punch has not yet entered into tight contact with the billets.

Figure 3 depicts a schematic view of the steel billet, bending punch and segmental matrices for cold forming, in which the process of cold forming axial front of the case is completed.

Figure 4 depicts a schematic view of the steel billet, bending punch and segmental matrices for cold forming, in which the process of cold forming axial rear of the case is completed.

Figure 5 depicts a side view of the steel cutting tool, made by cold forming in accordance with a specific embodiment, illustrated in figure 1.

6 depicts a side view of the steel cutting tool, made by cold forming in accordance with a specific embodiment, illustrated in figure 1, which shows the grain direction of the steel casing, and with the remote axial front part to illustrate the sleeve, which has a solid tip.

7 depicts a schematic side view of the axial front rotary cutting tools, punching asphalt (i.e. the thickness of the soil), which shows the movement of debris from the collision of the rotating cutting edge column g is the flying boot.

Fig depicts an isometric projection of a rotating cutting tool, penetration asphalt (i.e. the thickness of the soil), which illustrates the interaction between the rotating cutting edge and a chip or fragment to determine the angle of separation.

Fig.9 depicts an isometric projection of a rotating cutting tool, penetration asphalt (i.e. the thickness of the soil) with an angular offset, and which shows the interaction between the rotating cutting edge and a chip or fragment.

Detailed description of the invention

Figure 1 depicts a side view of a particular case for a rotating cutting tool, located in the Central channel of the tool holder (or block), which is in turn attached to the surface of the drive element (e.g., drum) and in which the block is cut to open the axial rear portion of the rotating cutting tool into the channel of the holder. More specifically, the node 20 rotary cutting tool includes a holder (or unit) 22 and rotating the cutting tool 24.

The holder 22 includes a housing 25 having a front surface 26, a rear surface 28, the top surface 30 and bottom surface 32. The holder 22 also includes a Central longitudinal channel 34, which is formed with generally cylindrical wall 36. The channel 34 into which incorporates both the axial front end 38 and the axial rear end 40. On the axial front end 38 of the channel 34 at an angle of forty-five degrees the camera is located 45.

The holder 22 is attached (e.g. by welding or similar method) to the surface 44 of the drive element (for example, a drum machine for leveling roads) 46. In a machine for leveling roads usually there are many holders 22, attached to the surface 44 of the drum machine for leveling road 46, typically having a spiral or similar configuration. During operation, the rotation of the drum 46 pushes the rotating cutting tools 24 in the thickness of the soil (e.g., asphalt) thus, in order to break the material into pieces (i.e. fragments).

As shown in figure 5, the rotating cutting tool 24 includes an elongated steel case 50 made using cold forming. U.S. patent No. 4,886,710 applicant Greenfield, which is included in this description by reference, discloses a steel suitable for the preparation of the housing 50.

The housing 50 has an axial front end 52 and the axial rear end 54. The housing 50 includes a slot 56 at its axial front end. Solid tip 58 is installed and secured (e.g. by brazing) in the socket 56 and is attached by brazing or a similar method to the case 50. Solid tip 58 includes a protrusion (not shown)that is shaped with testvol socket 56 and is placed in it, as is well known in the art. Solid tip 58 has a remote end, i.e. the vertex at the axial front end.

You must understand that alternatively, the axial front end of the housing may include a protrusion, which is located in the slot in the lower part of the solid tip. This alternative design may correspond to a design disclosed in U.S. patent No. 5,141,289 applicant of Stiffer, which is included in this description by reference. U.S. patent No. 5,141,289 also reveals brazing alloys that are commonly used for fastening by means of soldering solid tip in the socket housing.

As shown particularly in figure 5, the housing 50 includes a section 64 of the rear surface of the intermediate section 66 and the shank 68. Section 64 of the rear surface is located near, but spaced from the axial rear side of the axial forward end 52 of the housing 50. The shank 68 is located in the axial rear side of the housing 50. The intermediate section 66 is located between section 64 of the rear surface and the shank 68.

Section 64 of the rear surface begins at its axial front line And which is located at a distance from the axial rear side of the axial forward end 52 of the body 50 of the tool and is held in axial rear direction (indicated by the arrow) at a predetermined distance S, d is I to end in its axial rear boundary of D. Section 64 of the rear surface has a transverse dimension throughout its axial length. In this particular embodiment, cross-sectional dimension is the diameter, since the cross section is usually circular in shape.

Section 64 of the rear surface has an axial front transverse dimension at its axial front line A. In this particular embodiment, the axial front cross-sectional dimension of E is the maximum transverse size of the area 64 of the rear surface. Section 64 of the rear surface has a minimum lateral dimension of F at its axial rear boundary of D. In this particular embodiment, the minimum cross-sectional dimension is the axial rear transverse size.

As is clear from the drawings and particularly figure 5, the transverse size of the area 64 of the rear surface continuously decreases from the axial front lateral dimension of E to the minimum lateral dimension of F, located on the axial rear boundary of D. As illustrated in the drawings, this reduction of the lateral dimension is usually continuous and uniform. However, you must realize that this decrease may be uneven and may occur with varying degrees of intensity. In addition, as is clear from the drawings, the axial front lateral dimension of E is greater than the minimum transverse dimension F.

In this embodiment, the axial length S of section 64 of the rear surface is approximately equal to half the axial control the length of the housing 50. However, the applicant assumes that the ratio of S:may vary from about 10:100 to 75:100. When the narrowing of the range of the ratio S:may vary from about 35:100 to 55:100.

In addition, in this embodiment, the ratio of the axial length S of section 64 of the rear surface to the axial length T of the entire body 50 is about 20:100. However, the applicant assumes that the ratio S:T can vary from about 10:100 to 35:100. When the narrowing of the range of the ratio S:T can vary from about 20:100 to 32:100.

The applicant believes that the ratio of the axial length S of section 64 of the rear surface to the axial control the length of the housing 50 and the ratio of the axial length S of section 64 of the rear surface to the axial length T of the housing 50 should influence the operational characteristics of a rotating cutting tool, at least, by reducing the requirements of the capacity of the machine for leveling roads compared to the version used in this machine previously proposed rotary cutting tools. It is clear that rotating the cutting tool, which may reduce power requirements of the machine for leveling roads, has operational and economic advantages.

Meanwhile, the rotating cutting tools used in machines for leveling roads, often oriented at an angle of lateral inclination of approximately 5 to 10 to improve the rotation of the cutting tool. However, despite the fact that lateral tilt provides an improvement of rotation of the cutting tool, it also increases the magnitude of the lateral load on the rotating cutting tool. Thus, the presence of side clearance angle of the cutting edge (or side discharge) is particularly important when using machines for leveling roads (asphalt). You can see that the rotating cutting tool with such side rear corner cutting edge has the advantage over previously proposed instruments, as previously proposed cutting tools provided for unloading from the rear, but they did not provide for its discharge side.

As can be understood from the drawings, the section 64 of the rear surface usually has the shape of a truncated cone and defines the back corner G. Rear angle G is the angle between the section 64 of the rear surface and the Central longitudinal axis N-n of the housing 50. In this particular embodiment, assests the rear of the angle G is approximately equal to twenty degrees. Rear angle G can vary from about fifteen degrees to thirty-five degrees. When the narrowing of the range back angle G can vary from approximately twenty degrees to twenty-five degrees.

Alternatively, the area of the rear surface may start on the axial front end of the housing and held in axial rear direction to its end point (or axial rear boundary). In this alternative embodiment, the minimum transverse dimension is at the axial rear boundary and the rear surface.

In the specific embodiment illustrated in the drawings, the casing 50 of the cutting tool also includes a neck 70, which typically has a cylindrical shape, to ensure a constant transverse size. The neck 70 begins at the axial front end 52 of the housing 50 and passes from it to the preset distance I in the axial rear direction. The neck 70 is adjacent to section 64 of the rear surface at its axial front line of A.

The intermediate section 66 of the housing 50 adjacent to the axial rear boundary D of section 64 of the rear surface and passes from him in the axial rear direction at a predetermined distance J. Intermediate section 66 terminates at its axial rear boundary of K.

The intermediate section 6 includes an axial forward section 71, having the form of a truncated cone, which has an axial length of U and is at an angle V with respect to the Central longitudinal axis N-n of the housing 50. The angle V is equal to sixty (60) degrees.

The intermediate section 66 also includes an intermediate cylindrical section 72. The intermediate cylindrical section 72 is held in the axial rear direction by a predetermined distance L. the Intermediate section 66 also includes a rear section 76 having a shape of a truncated cone, which is adjacent to the intermediate cylindrical section 72 and passes from him in the axial rear direction by a predetermined distance M Axial rear section 76 having a shape of a truncated cone, contains a surface, which is located under the adjacent angle About the Central longitudinal axis N-n of the housing 50, which is approximately eighteen degrees. The angle O can vary from approximately eighteen degrees to forty five degrees.

The shank 68 is held against axial rear boundaries of the intermediate segment 66 in the axial rear direction. The shank 68 includes an arcuate cylindrical section 78, which is adjacent to the rear section 76 having a shape of a truncated cone and passes from him in the axial rear direction at a predetermined distance N. the Shank 68 also includes Qili the shape plot 82, which is adjacent to the arcuate cylindrical segment and passes from him in the axial rear direction. The cylindrical section 82 includes an annular groove 86. The shank 68 has a total axial length W.

Rotating the cutting tool 24 also includes an elastic retainer 90 (figure 1), which has an axial forward end 92 and an axial rear end 94. A longitudinal slot 96 runs along the longitudinal length of the retainer 94. The latch 90 includes a radial inner protrusion 98.

As illustrated in figure 1, the shank 68 of the housing 50 contains the latch 90 so that the radial inner protrusion 98 was located in the groove 86. This corresponds to the position of a holder shown and described in U.S. patent No. 4,850,649 the Beach, which is included in this description by reference.

As shown in Fig.2-4, the housing 50 is made through a process of cold forming. More specifically, as shown in figure 2, the cylindrical workpiece 100 is installed in a segment matrices 102 and plug 104 in such a way as to ensure the impact on the workpiece 100. Figure 3 depicts the completion of the stamping operation for forming the axial front side 50A of the housing of the cutting tool. Figure 4 depicts the completion of the stamping operation for forming an axial rear portion 50B of the housing of the cutting tool.

6 depicts CX who may be put at risk species, which shows the grain direction of the steel. As you can see, the texture became generally parallel (or corresponds to) the geometry of the peripheral surface of the housing 50. You must understand that the orientation of the texture increases the strength of the parts, i.e. the body of the cutting tool, in comparison with the item, in which parts made by machining, and the texture does not match the geometry of the workpiece surface. Considering the stamping process can be considered that the housing 50 is a net body, and if it is made of steel mesh steel case.

7 depicts a schematic view which illustrates the movement of the debris resulting from the interaction of the rotating cutting edge 24 with a layer of soil ES. Arrow AA indicates the direction of rotation and advancement of the solid tip into the thickness of the soil. Although the drawing illustrates a specific depth of cut, you need to understand that the depth of cut can be changed (or adjusted) depending on the specific application and operating conditions.

You can see that a significant portion of soil strata in the form of fragments of ED takes place for the area of the rear surface of the rotating cutting tool. Thus, it does not cause abrasive wear of the tool body in this area. In this Zack is udaetsya advantage of this rotary cutting tool 24 in comparison with the conventional rotary cutting tool, in which fragments of grated axial front part of the tool.

Fig depicts a front isometric projection of a rotating cutting tool 24, penetration asphalt (i.e. the thickness of the soil), which illustrates the interaction between the rotating cutting edge and a chip or fragment to determine the angle of separation. More specifically, shows the chip, which is a fragment of soil strata, destroyed or close to complete destruction. The chip contains a surface destruction, which is the open surface of the chip. Plane Y-Y is usually along the surface destruction. Angle Z separation is related to the angle between the longitudinal axis N-n of the rotary cutting tool 24 and the plane Y-Y. In this configuration, it is necessary to understand that the orientation of the rotating cutting tool such that the angle was zero.

Fig.9 depicts a front isometric projection of a rotating cutting tool 24, penetration asphalt (i.e. the thickness of the soil), which illustrates the interaction between the rotating cutting edge and a chip or fragment. More specifically, shows the chip, which is a fragment of soil strata, which destroyed or close to complete destruction. The chip contains a surface destruction, which is the open surface of the chip. The angle is triva will be essentially the same, as shown in Fig. With this configuration, it is necessary to understand that the orientation of the rotating cutting tool such that the angle of SA was equal to approximately ten degrees.

As mentioned above, when the penetration of a material such as asphalt, which has a small angle of separation, there is an increase in the contact zone between the rotating cutting tool, and in particular, between the axial face of the body of the cutting tool, and asphalt. The applicant believes that the ratio of the axial length S of the area of the rear surface 64 to the axial control the length of the housing 50 and the ratio of the axial length S of the area of the rear surface 64 to the axial length T of the housing 50 should influence the operational characteristics of a rotating cutting tool, at least, by reducing the power requirements of the machine for leveling roads compared to the version used in this machine previously proposed rotary cutting tools.

Meanwhile, the rotating cutting tools used in machines for leveling roads, often oriented at an angle of approximately 5 degrees to 10 degrees to improve the rotation of the cutting tool. However, despite the fact that lateral tilt provides an improvement of rotation of the cutting tool, it also increases the magnitude of the lateral load narasayya cutting tool. Thus, the presence of side clearance angle of the cutting edge (or side discharge) is particularly important when using machines for leveling roads (asphalt). You can see that the rotating cutting tool with such side rear corner cutting edge has the advantage over previously proposed instruments, as previously proposed cutting tools provided for unloading from the rear, but they did not provide for its discharge side.

One disadvantage of this increasing area of contact between the asphalt and the housing of the cutting tool is that it increases the resistance to advancement of the rotating cutting tool through the asphalt, which requires increasing the capacity of the drive pulley. It is clear that the present invention enables the creation of a rotating cutting tool, which can be used for punching of soil strata in which there is no need to increase the capacity of the drive pulley to ensure satisfactory operation when punching material, which has a small angle of separation. It is also clear that the present invention enables the creation of a rotating cutting tool, which has a configuration that reduces the degree of resistance of the rotating cutting tool for breaking down of soil strata and especially rotary cutting and is the instrument, when he breaks such material as asphalt, halite, natural gypsum, feldspar, or throne, in which there is a small corner of the margin.

Another disadvantage of increasing the area of contact between the material and the housing of the cutting tool is increased abrasive wear of rotary cutting tools and particularly abrasive wear steel cutting tools. It is clear that the present invention enables the creation of a rotating cutting tool, which contains the body of the cutting tool having a configuration that enables reducing the abrasive wear of the housing during operation and especially during the breaking down of materials such as asphalt, which have a small angle of separation. It is also clear that the present invention enables the creation of an improved rotary cutting tool, comprising a housing, providing for the improvement or protection of soldered connections between the solid tip and the housing during operation and especially during the breaking down of materials such as asphalt, which have a small angle of separation.

As mentioned above, in addition to abrasive wear, which is subjected to a rotating cutting tool (especially housing) when used in machines for leveling roads (or other applications in which a rotating cutting the tool breaks through the thickness of the soil), there is a significant load on the rotating cutting tool and the body of the cutting tool. It is clear that in accordance with the present invention the housing of the cutting tool has a high strength to reduce the likelihood of premature destruction of the body of the cutting tool. This strength is provided by the fact that the texture of the steel usually corresponds to (or parallel to) the geometry of the surface of the body of the cutting tool.

Patents and other specified documents incorporated herein by reference.

Other embodiments of the present invention will be clear to experts in the art from the detailed description or the practical implementation of the disclosed invention here. The description and examples are illustrative only and do not limit the scope of the formula of the present invention. The nature and scope of the present invention are disclosed in the attached formula.

1. A rotating cutting tool, comprising a housing of the cutting tool, having a first axial end and an axial rear end, and an axial length, solid tip, attached to the body at its first axial end and a remote end, the housing contains a plot of the rear surface located on an axis at the remote end of the rigid tip and the region have the transverse dimension, including axial front transverse dimension and a minimum transverse dimension that is located on the axis at the axial front cross-sectional dimension and an axial front size exceeds the minimum transverse dimension, and area of the back surface has an axial length in the range from about 10 to 35% of the axial length of the body of the cutting tool.

2. Rotary cutting tool according to claim 1, in which the area of the rear surface is in the range of about 20 to 32% of the axial length of the body.

3. Rotary cutting tool according to claim 1, in which the area of the rear surface begins at the axial front end of the housing and is held at a predetermined distance in the axial rear direction.

4. Rotary cutting tool according to claim 1, in which the area of the rear surface begins at the site located on the axis at the axial front end of the housing and is held at a predetermined distance in the axial rear direction.

5. Rotary cutting tool according to claim 1, in which the transverse size of the area of the rear surface continuously decreases from the axial front transverse size to the minimum lateral dimension.

6. Rotary cutting tool according to claim 1, in which the transverse size of the area of the rear surface uniformly decreases from the axial front transverse size to the minimum lateral dimension.

7. Rotary cutting tool according to claim 1, in which the area of the rear surface has the shape of a truncated cone to determine the posterior angle, which is in the range of about from 15 to 35.

8. Rotary cutting tool according to claim 6, in which the rear angle is in the range of about 20 to 25.

9. Rotary cutting tool according to claim 1, in which the area of the rear surface has an arcuate shape.

10. Rotary cutting tool according to claim 1, in which the housing also includes an intermediate section that is located on the axis behind the rear surface and having an axial rear boundary, and the cutting tool has a checksum length defined between the axial front end of the housing and the axial rear boundary of the intermediate segment, and the ratio of the axial length of the rear surface to control the length is in the range from about 10:100 to 75:100.

11. Rotating the cutting tool of claim 10 in which the ratio of the axial length of the rear surface to control the length is in the range from about 35:100 to 55:100.

12. Rotating the cutting tool of claim 10 in which the housing further includes a shank that is located along the axis of the intermediate section.

13. Rotary cutting tool according to claim 1, in which the body is made of steel, has a peripheral surface and has a texture, the direction which corresponds to the contour of the peripheral surface of the shell.

14. A rotating cutting tool, comprising a housing of the cutting tool having an axial forward end, an axial rear end and an axial length, solid tip, attached to the body at its axial front end, the housing includes an intermediate section of the site and a back surface located on the axis in front of the intermediate section and having a transverse dimension which decreases in the axial rear direction, and an axial length in the range of about 10 to 35% of the axial length of the body.

15. Rotating the cutting tool 14, in which the length of a section of the rear surface is in the range of about 20 to 32% of the axial length of the body.

16. Rotating the cutting tool 14, in which the area of the rear surface begins at the axial front end of the housing and is held at a predetermined distance in the axial rear direction.

17. Rotating the cutting tool 14, in which the area of the rear surface begins at the site located on the axis at the axial front end of the housing, and is held at a predetermined distance in the axial rear direction.

18. Rotating the cutting tool 14, in which the area of the rear surface is usually of the form usecan the first cone to determine the rear angle, approximately 15 to 35.

19. Rotating the cutting tool 14, further comprising a shaft located along the axis of the intermediate section and adapted to accommodate the elastic retainer.

20. Rotating the cutting tool 14, in which the body is made of steel, has a peripheral surface and texture, the direction of which corresponds to the contour of the peripheral surface of the shell.

21. The body of the cutting tool for use with solid tip having an axial forward end, an axial rear end and an axial length, the area of the rear surface having a transverse dimension, comprising an axial front transverse dimension and a minimum transverse dimension that is located on the axis at the axial front cross-sectional dimension, while the axial front size exceeds the minimum transverse dimension, and the axial length of the rear surface is in the range from about 10 to 35% of the axial length of the body.

22. The body of the cutting tool according to item 21, in which the area of the rear surface is in the range of about 20 to 32% of the axial length of the body.

23. The body of the cutting tool according to item 21, in which the area of the rear surface begins at the axial front end of the housing and is held at a predetermined distance in the axial rear direction.

p> 24. The body of the cutting tool according to item 21, in which the area of the rear surface begins at the site located on the axis at the axial front end of the housing, and is held at a predetermined distance in the axial rear direction.

25. The body of the cutting tool according to item 21, in which the transverse size of the area of the rear surface continuously decreases from the axial front transverse size to the minimum lateral dimension.

26. The body of the cutting tool according to item 21, in which the transverse size of the area of the rear surface uniformly decreases from the axial front transverse size to the minimum lateral dimension.

27. The body of the cutting tool according to item 21, in which the area of the rear surface has the shape of a truncated cone to determine the posterior angle, which is in the range of about 15 to 55.

28. The body of the cutting tool according to item 27, in which the rear angle is in the range of about 20 to 25.

29. The body of the cutting tool according to item 21, in which the area of the rear surface typically has an arched shape.

30. The body of the cutting tool according to item 21, further comprising an intermediate area located on the axis behind the rear surface and having an axial rear boundary, and the cutting tool has a checksum length defined between osewe the front end of the housing and the axial rear boundary of the intermediate segment, and the ratio of the axial length of the rear surface to control the length is in the range from about 10:100 to 75:100.

31. The body of the cutting tool according to item 30, in which the ratio of the axial length of the rear surface to control the length is in the range from about 35:100 to 55:100.

32. The body of the cutting tool according to item 21, which is made of steel, has a peripheral surface and texture, the direction of which corresponds to the contour of the peripheral surface of the housing.



 

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2 cl, 9 dwg

FIELD: mining.

SUBSTANCE: suggested invention is related to the field of mining and construction, in particular to cutters with round tails. Cutter with round tail comprises tail, at the same time tail is retained with the possibility of rotation in clamping cartridge. Clamping cartridge is equipped with one or several retaining elements that protrude inside, which enter circular groove arranged in cutter tail, so that clamping cartridge is retained on round tail of cutter without possibility of shift in axial direction. One or several retaining elements are installed in medium transverse plane of clamping cartridge or have identical axial distance from it. Clamping cartridge is arranged with the possibility of installation in two axial positions turned by 180 around its longitudinal axis on round tail of cutter and fixation on it selectively in one of both identical positions. Retaining elements are arranged between two oriented forming edges across longitudinal axis of clamping cartridge and are stamped and/or impressed inside. Besides forming edges pass along part of clamping cartridge circumference and have distance from each other, which is equal or less than width of circumferential groove in round tail of cutter.

EFFECT: simplified installation of clamping cartridge on round tail of cutter.

11 cl, 4 dwg

FIELD: mining.

SUBSTANCE: disclosed group of inventions refers to mining industry, particularly to rock destruction tool for mining machines used at deposit development. The cutter consists of an elongated tail piece, of a cutting element secured at one end of the tail piece, projected out of it and made out of material of hardness exceeding hardness of the tail piece, and of a composed bushing formed with multitudes of belts secured around the tail piece near the cutting element and directly adjoining each other. Also belts of the bushing are fabricated out of material more hard, than material of the tail piece, the material of belts is less prone to produce an igniting spark, than material of the tail piece during cutting.

EFFECT: increased safety at mining operations due to reduced probability of generating igniting spark when cutter touches surface of rock in mining works hazardous for gas and dust, also increased wear resistance of cutter tail piece.

27 cl, 4 dwg

Tool holder. // 2347907

FIELD: mining..

SUBSTANCE: invention refers to mining and building, particularly to machines with pulvimixer. A tool holder for a machine with the pulvimixer or such like has base (10) which bears holding added piece (30), also added piece (30) has receiving seat (31) of the cutting tool; and lug (15) is attached to base (10) before holding added piece (30) in the direction of tool holder feeding. Base (10) has connecting section (20) made in form of a chip breaker; the connecting section is formed on base (10) and passes at least partially through lug (15) starting from holding added piece (30). End section (34) of holding added piece (30) has intake seat (31) of the cutting tool made in form of an aperture. Also end section (34) has circular contact surface (33) passing around medium lengthwise axis of intake seat (31) of the cutting tool. Contact surface (33) which is located radially outside passes up to dimension boundaries of a cylinder region of end section (34). Connecting section (20) returning in the direction of the axis relative to contact surface (33) is connected with holding added piece (30).

EFFECT: improved operation of cutting of disk pulvimixer.

9 cl, 3 dwg

FIELD: mining engineering.

SUBSTANCE: invention relates to mining industry, particularly the cutting tools of mining machines serving to disintegrate coal and other mine rocks. The cutting tool for disintegration of coal and other mine rocks consists of a tool holder with a lengthwise passage for water supply and a cutting tool cartridge as a core with through microcanals connecting the surface of the cutting tool cartridge working part with the lengthwise passage of the tool holder. Outlet holes of the microcanals on the surface of the cutting tool cartridge are made as contour rows positioned throughout the entire length of the working surface forming a cone. This structure increases the distance between the rows of the outlet holes as it gets further away from the top of the core, and the density of distribution of the microcanal external holes on the working surface of the cutting tool cartridge rises toward the top of the core.

EFFECT: extended life of a cutting tool and decreased wear of the cutting tool cartridge.

1 dwg

FIELD: mining.

SUBSTANCE: toolhead for drawknife cutter features mounting pocket open from above for receiving cutter liner limited at the ends with two lateral, one front and one back supporting walls forming drawknife cutter support located mainly in the middle part of back supporting wall and descending to the outer areas. End side of the back support wall directed to the mounting pocket features guiding surfaces in the outer areas, the said guiding surfaces descending inside at an angle to the mounting pocket and serving as an auxiliary mounting device for drawknife cutter.

EFFECT: excellent support of inserted cutter and fast and simple cutter mounting.

8 cl, 4 dwg

FIELD: mining.

SUBSTANCE: toolhead for drawknife cutter features mounting pocket open from above for receiving and supporting cutter liner limited at the ends with two lateral walls in relation to the operation drawknife direction, a front and a back supporting walls, the latter being higher than the former. One lateral support wall oriented away from breakage face during operation is higher than the front and the other lateral walls and forms a lateral cutter liner support longer than the other lateral support wall.

EFFECT: prolonged work life.

20 cl, 6 dwg

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, in particular the construction equipment for processing surfaces of the ground with a milling drum. The construction equipment for processing a surface of the ground by a milling drum, on whose surface is located a large number of blade holders, and in the jack for holding the blades of the blade holders placed with the possibility of replacing the blades, in particular a blade with a round shank, and moreover by means of the device for tool replacement is carried out or blades from blade holders and/or mounts it. The milling drum is supplied with the device for tool replacement, the adjusting device is intended for positioning the milling drum or the blade in relation to at least one adaptation for tool replacement and/or the actuating unit provides the positioning, at least one adaptation for tool replacement relative to the milling device, the actuating unit and/or the adjusting device has a measuring system for determining the position, and moreover the actuating unit and/or the adjusting device are supplied with a digital control device.

EFFECT: simplification in the replacement of blades.

30 cl, 5 dwg

FIELD: mining, particularly mining picks and holders therefore.

SUBSTANCE: cutter comprises stem and head with main cutting edge extending at acute α angle to face surface, with inner side edge parallel to longitudinal cutter axis. Cutter also has outer side edge inclined to longitudinal cutter axis towards stem and end support surface transversal to stem. Support surface is parallel to main cutting edge. Main cutting edge is shaped as convex broken line defining obtuse angle at apex thereof. The obtuse angle is equal to 180-α. End support surface is congruous to main cutting edge. Outer side face is transversal thereto.

EFFECT: increased wear resistance due to improved cutting edge strength.

3 dwg

FIELD: transport.

SUBSTANCE: proposed device comprises tooth arranged in adapter and connecting element with sleeve made from elastic deformable material, and key. Said tooth and adapter have holes and zones to receive said sleeve and key. Note that said key is inserted into sleeve to extend therefrom. Note also that said key is fitted aligned with sleeve to displace therein, while sleeve is arranged in adapter part. Key has end part that makes key base, and key head on the body opposite part. Key head has part that makes bearing surface with shifted center. The latter enters appropriate surface made in the tooth first hole. Key head end can be turned by actuator element. Key base has anchoring appliance that enters in elastically deformable sleeve due to first tightening preset-force action. Key base end has conical part that thrusts against tooth second hole making second tightening action exceeding aforesaid one and created by key turn. Key turn governs is shift relative to its initial axis and allows its locking by anchorage on either tooth metal components or different bearing zones.

EFFECT: appropriate locking of tooth-adapter link, higher labor safety.

16 cl, 21 dwg

FIELD: construction.

SUBSTANCE: cog unit of earthmover bucket comprises cog with seat, which is open at the back and is a female part, besides specified cog has hole for fitting of fixing stud, adapter, having ledge, which is a male part that matches shape of specified seat, besides mentioned ledge is crossed with matching site for fixing stud, fixing stud inserted into specified hole of cog and into specified matching site in adapter and serving for cog fixation to adapter. At least one of specified opposite surfaces of ledge has lowered or deepened area arranged around matching site for fixing stud. At least the wall of seat that is inverted towards specified surface of ledge has relief part additionally to specified lowered or deepened area, having shape of boss that gradually increases in direction of open part of seat. Specified hole in seat walls and specified matching site in ledge have according flat back surfaces, which are matched to each other. Fixing stud has flat back surface, which simultaneously lies onto specified back surfaces of hole and matching site.

EFFECT: simplified design of cog unit for manufacturing, lower costs, avoidance of cog disconnection from adapter under severe operation conditions.

32 cl, 14 dwg

FIELD: mining, particularly excavation equipment for detachable connection of replaceable tooth crown in earth-shifting machine.

SUBSTANCE: device comprises the first and the second telescopically joined members, aligned orifices formed in the members and adapted for connector receiving and connection finger unit for forced retention of the first and the second members so that the members are telescopically arranged one relatively another. Connection finger unit comprises body, fixing member and resilient stop member. The body is arranged in the aligned orifices so that the body may be removed therefrom. The connector prevents separation of the first member from the second one. The body also has channel opened in outer surface thereof and having non-round side surface section. Fixing member is arranged in channel and limited by side surface section. The fixing member may rotate with respect to the body from fixing position into releasing position and in reverse direction. Resilient stop member is connected with fixing member so that the stop member may rotate together with fixing member. The stop member is adapted to retain fixing member in fixing position. The stop member has periphery delimiting fixing member. The periphery is slidably joined with non-round side surface section so that the periphery and the side surface are mutually complementary.

EFFECT: increased efficiency of connection unit for wearing and support member connection.

37 cl, 14 dwg

FIELD: mining industry.

SUBSTANCE: invention can be used in working members of mining and earth-moving machines, particularly, in machines for digging hard and frozen soils. Proposed ripper point for breaking hard and frozen soils has shank with slot for fastening, and wedge-like working part formed by front end surface, two side surfaces and rear surface. Working part of front end surface located in place of intensive wear is reinforced along longitudinal axial line H-H by three of stress concentrators, being round elements projecting over front end working surface and dipped into body of point. Distance L between concentrators in row and distance 1 between rows is equal to triple value of their diameter.

EFFECT: reduced effort to applied to small soil, reduced power consumption for ripping, increased service life of ripper point.

3 dwg

FIELD: mining and building, particularly material shifting devices adapted to releasably connect replaceable bit of excavation tooth with transitional extension structure fastened thereto.

SUBSTANCE: replaceable bit is telescopically put on transition extension and removably secured thereto by means of elongated flat connection unit provided with side peripheral part free of constriction. Connection unit extends in longitudinal direction through bit and connection orifices aligned with each other and prevents bit removal from transitional extension by forward movement thereof. Transversal support surface of bit side facing one end of connection unit prevents it outward passage through one bit orifice. Blocking member supported by another connection unit end and engaged with groove in another bit orifice prevents outward connection member passage through bit orifice provided with grooves. Support structure releasably retains the blocking member in closing and opening directions, which prevent blocking member displacement parallel to connection unit length.

EFFECT: simplified working tool replacement.

51 cl, 5 dwg

FIELD: mechanical engineering; design of excavator dipper teeth.

SUBSTANCE: parallelepiped inserts are fitted in tooth point and inserts of cylindrical form are fitted further on along working plane. Inserts manufactured of wear-resistant cast iron, owing to shadow effect, prevent intensive abrasive wear of steel base, thus increasing service life of tooth. As wear-resistant inserts are arranged only on one of working surfaces, other surfaces (opposite one) is subjected to more intensive wear which provides finally sharpening of tooth in process of operation. Use of such design and method of manufacture make it possible to increase service live more than two times and provided reliability of operation of excavator dipper.

EFFECT: increased service life and provision of self-sharpening of tooth point owing to fitting-in small size wear-resistant cast iron parts in steel base.

4 cl, 4 dwg

FIELD: dredgers or soil-shifting machines for special purposes, particularly to cut chaps in ground.

SUBSTANCE: device comprises at least one cutter brought into rotation and at least one the first cutting member to cut ground during cutter rotation in the first direction. At least one the second cutting member for ground cutting rotated in the second direction opposite to the first one is installed on the cutter. At least one of the cutting members may be shifted from the first ground cutting position to the second diverted position. Executive tool to shift the cutting member between the first and the second positions is also provided.

EFFECT: increased cutting ability in both rotational directions, prevention of excessive cutting member wear.

12 cl, 2 dwg

FIELD: excavation equipment, particularly small metalwork for digging elements.

SUBSTANCE: unit for wearing and supporting members has replaceable tooth head and holding structure including intermediate holder with front part of front end arranged in pocket of rear end of tooth head and complementary thereto. Front part is secured in the pocket by the first glut pin structure. Holding structure also has main holder with front part of front end complementarily inserted in pocket of rear end of intermediate holder and secured in the pocket by the second glut pin structure. Rear end of main holder is operatively secured to cutting blade of excavator bucket. Each front part have oval configuration elongated in horizontal direction. Glut pin structures extend in horizontal direction. Front parts have reinforcing projections arranged in orifices adapted to secure front parts. Holder and tooth head are provided with mating ribbed areas.

EFFECT: reduced unit size, improved power and working characteristic, as well as wear-resistance characteristics.

40 cl, 7 dwg

FIELD: earth-moving equipment.

SUBSTANCE: proposed excavator tooth unit contains holder with main part and nose part, both arranged coaxially relative to longitudinal axial line of holder. Main part is made for fastening said holder to excavator. Nose part terminates in free front end and it has upper and lower surfaces located mainly respectively higher and lower than longitudinal axial line of said holder. Upper surface of said nose part has two inclined sides arranged at opposite sides from longitudinal axial line and in front relative to rear end of said nose part over its length. Each inclined side of said upper surface is arranged at angle of 25-65° to horizontal plane. Lower surface of said nose part has two sides arranged at opposite sides relative to longitudinal axial line of said holder. Cavity made in said nose part comes to one of inclined sides of said upper surface of nose part of holder, being arranged along axis intersecting opposite sides of upper and lower surfaces of said nose part at angle of 30-60° to horizontal plane. Excavator tooth has front and rear end parts. Blind space open to rear end of said tooth and designed for fitting-in section of nose part of holder is made in rear end part of said tooth. Tooth is provided with hole arranged in working combination with inclined cavity of holder when tooth and holder are in working connection. Pin-type locking device is provided being arranged in cavity of said holder and at least partially passed through hole in said tooth for detachable fastening of tooth and holder in working connected. Tooth and holder described in invention form with tooth unit a ground of inventions.

EFFECT: improved reliability of excavator tooth unit.

40 cl, 31 dwg

The invention relates to the field of earth-moving machines and can be used in the working bodies of draglines, excavators, bulldozers, loaders, with working bodies with replaceable teeth

FIELD: earth-moving equipment.

SUBSTANCE: proposed excavator tooth unit contains holder with main part and nose part, both arranged coaxially relative to longitudinal axial line of holder. Main part is made for fastening said holder to excavator. Nose part terminates in free front end and it has upper and lower surfaces located mainly respectively higher and lower than longitudinal axial line of said holder. Upper surface of said nose part has two inclined sides arranged at opposite sides from longitudinal axial line and in front relative to rear end of said nose part over its length. Each inclined side of said upper surface is arranged at angle of 25-65° to horizontal plane. Lower surface of said nose part has two sides arranged at opposite sides relative to longitudinal axial line of said holder. Cavity made in said nose part comes to one of inclined sides of said upper surface of nose part of holder, being arranged along axis intersecting opposite sides of upper and lower surfaces of said nose part at angle of 30-60° to horizontal plane. Excavator tooth has front and rear end parts. Blind space open to rear end of said tooth and designed for fitting-in section of nose part of holder is made in rear end part of said tooth. Tooth is provided with hole arranged in working combination with inclined cavity of holder when tooth and holder are in working connection. Pin-type locking device is provided being arranged in cavity of said holder and at least partially passed through hole in said tooth for detachable fastening of tooth and holder in working connected. Tooth and holder described in invention form with tooth unit a ground of inventions.

EFFECT: improved reliability of excavator tooth unit.

40 cl, 31 dwg

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