Pick or earth-moving tool, comprising insert and ring of cemented tungsten carbide, machine for material removal, comprising such tool, and method to manufacture such tool

FIELD: construction.

SUBSTANCE: pick or earth-moving tool comprises a body, a support surface, comprising a cavity and axially protruding side walls, an insert fixed in the cavity, comprising a tip, a cone-shaped front surface, a side surface and a transition edge at the crossing of front and side surfaces, and a ring arranged radially outside the protruding side walls, made of a more solid material compared to the body. The axial position of the transition edge and the axial position of the axially most front surface of side walls are substantially identical, at the same time the axially most rear surface of the insert is arranged at the axial distance L' from the insert tip, and the axially most front surface of the ring is arranged at the axial distance D' from the insert tip, where 0.5L'≤D'≤0.9L', preferably, 0.5L'≤D'≤0.8L'. The transition edge and the section of the cone-shaped front surface may be arranged inside a ballistic contour formed by the insert tip, the radially most external section of the axially most front surface of side walls and the ring.

EFFECT: invention provides for operation of a tool under heavy conditions, extended service life of a tool, and reduction of tool blunting to the minimum for improved operational characteristics.

13 cl, 7 dwg

 

The technical field to which the invention relates

The present invention relates to demolition or excavation tool. In particular, the present invention relates to demolition or excavation tool, containing the working end comprising a cemented carbide insert, socket insert, containing protruding side walls, and a ring of material with a higher hardness compared to the tool body located radially outside of the protruding side walls, the side walls and the ring are ongoing in the rear direction of the stepped configuration.

The level of technology

In the description below, the prior art reference is made to certain structures and/or methods. However, the links below should not be interpreted as recognition that these structures and/or methods are known to the prior art. The applicant expressly reserves the right to demonstrate that such structures and/or methods do not constitute prior art.

Tools for blasting or excavation that provides working inserts of hard metal, made in configurations that have a lower power consumption at a given operational ability. Despite the fact that in the data in which the tools with low energy consumption the front tip of the insert is configured to allow the effect of cutting or destruction, if the body is exposed to impact or abrasion during operation of the tool, made of softer material, the case is worn and damaged. One result of this wear and tear is a loose insert. In this case, the tool prematurely fails, because the insert is separated.

Currently there is not a pointed tool, suitable for heavy duty drilling (for example, tunneling, trenching, and others). Tips provide protection with a thin layer of steel, but in the harsh conditions do not tend to remain in their steel buildings. In one known tool on the front surface of the housing ring. However, the axial location of the ring on top of the insert impedes the penetration due to the blunting of the tip. Pointed tools with a blunt tip creates excessive dust, consume too much energy, generate more heat and create a strong vibration.

There is a need for demolition or excavation tool, which provides the advantages of tip and retention insert, and suitable for the toughest of conditions, while extending tool life. In addition, there is a need to reduce to a minimum the blunting of the tool to improve the performance.

Disclosure of invention

Given as examples demolition or excavation tool includes a housing that includes a mounting end and a working end, a bearing surface at the working end including a cavity and axially projecting sidewalls, made in one piece with the housing, the insert is fixed in the cavity, which includes the tip axially on the front end, a conical front surface, side surface and a transition edge at the intersection of the front surface and the side surface, and a ring located radially outside of the protruding side walls, and a ring made of a material with a higher hardness as compared with the case tool, with a transition edge and the axial front surface of each of the side walls and rings are axially continuing in the rear direction of the stepped configuration.

Given as an example of a machine for removing material includes a rotating element and one or more demolition or excavation tools installed on the rotating element, and demolition or excavation tool includes: a housing that contains the installation end and a working end, a bearing surface at the working end including a cavity and axially you topause side walls, made in one piece with the housing, the insert is fixed in the cavity containing the tip axially on the front end, a conical front surface, side surface and a transition edge at the intersection of the front surface and the side surface, and a ring located radially outside of the protruding side walls, and a ring made of a material having a higher hardness than the body of the instrument, with a transition edge and the axial front surface of each of the side walls and rings are axially continuing in the rear direction of the stepped configuration.

Given as an example of a method of manufacturing a demolition or excavation tool includes a first support surface at the working end of the tool body and the support surface includes a cavity and axially projecting sidewalls, made in one piece with the body; the formation of the second support surface radially outside the cavity of the first bearing surface; attaching the insert to the first support surface, and the insert includes a tip axially on the front end, a conical front surface, side surface and a transition edge at the intersection of the front surface and the side surface is; and fastening the ring on the second reference surface, with the fixed ring is located radially outside of the protruding side walls, and a ring made of a material with a higher hardness compared to the tool body, and a transition edge and the axial front surface of each of the side walls and rings are axially continuing in the rear direction of the stepped configuration.

Another cited as an example of demolition or excavation tool includes a housing that includes a mounting end and a working end, a bearing surface at the working end including a cavity and axially projecting sidewalls, made in one piece with the housing, the insert is fixed in the cavity containing the tip axially on the front end, a conical front surface, side surface and a transition edge at the intersection of the front surface and the side surface, and a ring located radially outside of the protruding side walls, and a ring made of a material with a higher hardness as compared with the case tool while the axial position of the transition edge and an axial position of the axially front surface of the side walls are essentially the same.

The other is listed as an example of a method of manufacturing a demolition or excavation tool includes a first support surface at the working end of the tool body, moreover, the bearing surface includes a cavity and axially projecting sidewalls, made in one piece with the casing, the formation of the second support surface radially outside the cavity of the first bearing surface, the fastening of the insert on the first support surface, and the insert includes a tip axially on the front end, a conical front surface, side surface and a transition edge at the intersection of the front surface and the side surface, and the fastening ring on the second support surface, and the anchor ring is located radially outside of the protruding side walls, and at the same time the ring is made of a material with a higher hardness compared to the body of the instrument, while the axial position of the transition edge and an axial position of the axially front surface of the side walls are essentially the same.

It should be understood that both the foregoing General description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the claimed invention.

Brief description of drawings

The following detailed description is read in conjunction with the attached drawings, in which similar reference position mark the anal is similar elements, and on which:

Figure 1 is a view in section taken as example case for demolition or excavation tool.

Figure 2 is a view in section of the bumper or excavating tool according to figure 1, showing the individual elements in a disassembled state.

Figure 3 is an enlarged view in section of the working end of the demolition or excavation tool in accordance with Fig 1.

Figure 4 is a side view is shown as an example of a variant of implementation of the working end demolition or excavation tool in accordance with Fig 1.

Figure 5 is a view in section of another is given as an example case for demolition or excavation tool.

6 is a view in section of the bumper or excavating tool according to figure 5, showing the individual elements in a disassembled state.

Fig.7 is an enlarged view in section of the working end of the demolition or excavation tool in accordance with figure 5.

Detailed description of the invention

Given in example embodiments of demolition and excavation tools contain the insert on the working end and an installation tool, such as a thrust sleeve or clamp, in tanobocno the end. The insert is made of a rigid material, an example of which is cemented carbide.

Figure 1 is a view in section taken as example case for demolition or excavation tool. Demolition or excavation tool 2 includes a housing 4, which includes the installation end 6 and the working end 8 located longitudinally along the axis 10. At the working end 8 is supporting surface 12. Bearing surface 12 includes a cavity 14 and the axially protruding side walls 16. The side walls 16 is made in one piece with the housing 4 in a suitable way, for example by machining or a combination of preliminary molding by, for example, casting or stamping and machining. The side walls 16 include a front surface 18, which is essentially perpendicular to the axis 10.

The insert 20 is fixed in the cavity 14. Listed as a variant example of implementation of the insert 20 includes a tip 22 at the axial forward end 24, a conical front surface 26, the side surface 28 and the transition edge 30 at the intersection of the front surface 26 and the side surface 28.

The ring 40 is located radially outside of the protruding side walls 16. The ring 40 is the outer radial longitudinal element at this is castle along the axis 10, since there is no section of the casing 4, which is located radially outside of the outer diameter of the ring 40. Listed as a variant example of implementation of the ring 40 includes a front surface 42, which is essentially perpendicular to the axis 10. Listed as a variant example of implementation of the ring 40 is made of a material more rigid than the material forming the body of the instrument, i.e. more solid than steel shell 4, and more specifically, more rigid than the material forming the protruding side walls 16.

The various elements demolition or excavation tool 2, such as a support surface 12, the cavity 14 and the axially protruding side walls 16, more clearly shown in figure 2, which represents a view in section of demolition or excavation tool 2 in accordance with figure 1 in a disassembled state. Figure 2 also shows the bearing surface 44 of the ring 40. As can be seen in figure 2, the supporting surface 12 is a continuous cavity, which provides improved support for the insert 20 against lateral forces perpendicular to the axis 10. In addition, a continuous cavity provides efficient movement of solid solder during fixing of the insert 20.

Given in example embodiments of demolition or excavation tool which may be included in a machine for removing material. Examples of machines for removing material include machines for underground mining, surface mining, trenching, planning and/or restoration of roads. For example, a machine for removing material includes a rotating element and one or more demolition or excavation tools installed on the rotating element. Box 20, side walls 16 and the ring 40 are arranged so that the material removed in the demolition or excavation works using tool 2, preferably, is carried away to the side surfaces of the tool 2. Under such conditions, the removed material may be ground surface of the tool.

In order to extend the service life of the described tool 2, a transition edge 30 and the axial front surface 18, 42 of each of the side walls 16 and ring 40 are axially continuing in the rear direction of the stepped configuration. When using the removed material will accumulate on the surfaces of stepped configuration, such as the front surface 18 of the side wall 16 and the front surface 42 of the ring. With increasing disposable material this accumulated material is subjected to abrasion, and a smaller portion of the surfaces of the working end 8 is subjected to wear.

Figure 3 is an enlarged view of the cut in the working end of the bumper or excavating tool according to figure 1 and illustrates this stepped configuration. However, manual configuration is also within the ballistic path of the tool 2. For example, a transition edge 30, the radially outer section 50 axially the front surface 18 of the side wall 16 and the radially outer section 52 axially the front surface 42 of the ring 40 is located on a ballistic path 54 of the tool 2. In the above example embodiments, the implementation of the ballistic path forms an angle α equal to about 60 degrees or less, alternatively in the range of 45 degrees to 60 degrees.

Figure 3 also represents the present example embodiments of the relative axial positions of the insert 20 and the ring 40 and the relative radial positions and thicknesses of the insert 20, the side walls 16 and ring 40.

For example, with regard to the relative axial positions of the insert 20 and the ring 40, the axially rear surface 60 of the insert 20 is located at an axial distance L from the tip 22 of the insert 20, and the axial front surface 42 of the ring 40 is located at an axial distance D from the tip 22 of the insert 20. Given in example embodiments of maintain the relative axial position of the data elements, so that D is equal to or is within 0,5L 0,9L (i.e. 0,5L≤D≤0,9L), alternatively, avno or is within 0,5L 0,8L (i.e. 0,5L≤D≤0,8L), alternatively, equal to, or is in the range from 0,6L 0,8L (i.e. 0,6L≤D≤0,8L). In addition, the axially rear surface 56 of the ring 40 is located at an axial distance d from the tip 22 of the insert 20, and the relative axial position of the data elements are such that d is greater than D, and d is less than L, in the alternative, d≤0,9L, alternatively, d≤0,75L. For example, in one given in the example embodiment 0,5L≤D≤0,8L and d≤0,9L. The relative axial position of the insert 20 and the ring 40 improve bearing insert 20 and provide better support against the forces applied to the insert during use.

As noted above, the ring 40 is the outer radial element in this longitudinal section along the axis 10, because there is no section of the casing 4, which is located radially outside of the outer diameter of the ring 40. Thus, in the interval between D and D ring 40 is radially most outer part of the tool 2. As shown in figure 3, the ring 40 is located entirely within the axial length of the insert, so that the axially rear surface 60 of the insert 20 is continued axially back over the ring 40, and the other part of the insert 20 is continued axially forward beyond the axially upper surface 42 of the ring 40.

In another example, and with regard to the relative for the selected positions and thicknesses of the insert 20, the side walls 16 and the ring 40, the radial thickness of the side walls 16 is the maximum of lsand the radial thickness of the ring 40 is the maximum of lr. Given in example embodiments of maintain the relative radial position and thickness of these elements, so that lrgreater than or equal to ls(i.e. lr≥ls). The thickness of the lsside wall 16 is sufficient, without the ring 40 to provide a continuous use of demolition or excavation tool 2. Thus, if the ring is lost or otherwise removed as a result of, for example, tear or abrasion, the insert 20 has sufficient support from the side walls 16 to continue cutting operation. As an example, the radial thickness of the side walls 16, shown as an example, the thickness is within 1 mm≤ls≤4 mm

Figure 4 is a side view is shown as an example of a variant of implementation of the working end 8 demolition or excavation tool 2.

Figure 5 is a view in section of another is given as an example case for demolition or excavation tool. Given as examples demolition or excavation tool 102 includes a housing 104, which includes the installation end 106 and the working end 108 located about oline along the axis 110. On the desktop end 108 is supporting surface 112. Bearing surface 112 includes a cavity 114 and axially projecting sidewalls 116. The side walls 116 are made in one piece with the housing 104 in a suitable way, for example by machining or a combination of preliminary molding by, for example, casting or stamping and machining. The side walls 116 contain the front surface 118, which is essentially perpendicular to the axis 110. Radially inner surface 117 of the side walls serves as one of the supporting surfaces 112.

The insert 120 is fixed in the cavity 114. Listed as a variant example of implementation of the insert 120 includes a tip 122 axially on the front end 124, a conical front surface 126, the side surface 128 and the transition edge 130 at the intersection of the front surface 126 and the side surface 128. The insert 120 is fixed in the cavity 114, so that the axial position of the transition edge 130 and the axial position of the axially front surface 118 of the side walls 116 are essentially the same, i.e. within 1 mm from each other; alternatively, are in the same axial position.

In addition, figure 5 illustrates the relative position of the insert 120 and the radially inner wall 117 of the side walls 116. Example is, plot protruding side walls 116 cuts transitional edge 130 of the insert 120 in a radially inner direction. Figure 5 shows the plot 132 cropping. Inner wall 117 has an initial section 134, which is reduced in thickness compared with the plot 136 full thickness of the side wall 116. This initial segment 134 can be, for example, a beveled forward. You can also use an alternative geometry that includes a curved configuration, a curved configuration or linear configuration, the connecting section 136 full thickness from the front surface 118. In addition to different thicknesses axially along the inner wall 117 of the side walls 116, the radius of the side surface 128 of the insert 120 is less than the radius of the transition edge 130. The inclusion of section 132 of the cutting and the relative geometry of the insert 120 and the side wall 116 allows you to use less carbide, thereby reducing costs. However, the working surface of the insert 120 is not affected, if at all decreases, so the tool retains its function. In addition, the increased thickness of the side wall, at least along part of the site of fixation of the insert and thus increased the strength of the retention insert.

The ring 140 is located radially outside of the protruding side walls 116. The ring 140 is the most outer radial element in this longitudinal section along the axis 110, because there is no part of the building 104, which is located radially outside of the outer diameter of the ring 140 in this area. Listed as a variant example of implementation of the ring 140 includes a front surface 142, which is essentially perpendicular to the axis 110. Listed as a variant example of implementation of the ring 140 is made from a material more rigid than the material forming the body of the instrument, i.e. more solid than steel casing 104, and more specifically, more rigid than the material forming the protruding side walls 116.

The various elements demolition and excavation tool 102, such as a support surface 112, the cavity 114 and axially projecting sidewalls 116, more clearly shown in Fig.6, which is a view in section of demolition or excavation tool 102 in accordance with figure 5 in a disassembled state. Figure 6 also shows the bearing surface 144 for ring 140, which contains a rear surface 146, which is radially farther than the outer diameter of the ring 140. As seen in figure 6, the support surface 112 is a continuous cavity, which provides improved support for the insert 120 against lateral forces perpendicular to the axis 110. In addition, a continuous cavity provides effective moving firm at the OYA during fixing of the insert 120.

Given in example embodiments of demolition or excavation tool can be included in a machine for removing material. Examples of machines for removing material include machines for underground mining, surface mining, trenching, planning and/or restoration of roads. For example, a machine for removing material includes a rotating element and one or more pneumatic or digging tools, mounted on a rotating element. The insert 120, the side walls 116 and ring 140 are arranged so that the material removed in the demolition or excavation works using the tool 102, preferably, is carried away to the side surfaces of the tool 102. Under such conditions, the removed material may be ground surface of the tool.

In order to extend the service life of the described tool 102, transition flange 130 and the plot conical front surface 126 are inside a ballistic path, formed by the tip 122 of the insert 120, the radially outer area 150 axial the front surface 118 of the side wall 116 and the radially outer section 152 of the ring 140. In addition, the axial front surface 118, 142 of each of the side walls 116 and ring 140 are axially continuing in the rear direction of the stupas is natoi configuration. When using a disposable material accumulates on the surfaces of stepped configuration, such as the front surface 118 of the side wall 116 and the front surface 142 of the ring 140. With increasing disposable material this accumulated material is subjected to abrasion, and a smaller portion of the surfaces of the working end 108 is subjected to wear.

Fig.7 is an enlarged view in section of the working end of the bumper or excavating tool according to figure 5 and illustrates the ballistic path and speed configuration. For example, the tip 122, the radially outer area 150 axial the front surface 118 of the side wall 116 and the radially outer section 152 axially the front surface 142 of the ring 140 is located on a ballistic path 154 of the tool 102. In the above example embodiments, the implementation of the ballistic path 154 forms an angle α'equal to about 60 degrees or less, alternatively in the range of 45 degrees to 60 degrees. The profile of the stepped configuration is also within the ballistic path 154 of the tool 102.

7 also illustrate example embodiments of the relative axial positions of the insert 120 and the ring 140 and the relative radial positions of italin insert 120, the side walls 116 and ring 140.

For example, with regard to the relative axial positions of the insert 120 and the ring 140, the axially rear surface 160 of the insert 120 is located at an axial distance L' from the tip 122 of the insert 120 and the axial front surface 142 of the ring 140 is located at an axial distance D' from the tip 122 of the insert 120. Given in example embodiments of maintain the relative axial position of the data elements, so that D' is equal to or is within 0,5L' to 0,9L' (i.e. 0,5L'≤D'≤0,9L'), alternatively, equal to or is within 0,5L' to 0,8L' (i.e. 0,5L'≤D'≤0,8L'), alternatively, equal to, or is in the range from 0,6L' to 0,8L' (i.e. 0,6L'≤D'≤0,8L'). In addition, the axially rear surface 156 of the ring 140 is located at an axial distance d' from the tip 122 of the insert 120, and the relative axial position of the data elements are such that d' is greater than D', and d' is less than L', alternatively, d'≤0,9L', alternatively, d'≤0,75L'. For example, in one embodiment, 0,5L'≤D'≤0,8L' and d'≤0,9L'. The relative axial position of the insert 120 and the ring 140 improve the bearing insert 120 and provide better support against the forces applied to the insert during use.

As noted above, in the example embodiment, the ring 140 is most renowned as the major radial element in this longitudinal section along the axis 110, because there is no part of the building 104, which is located radially outside of the outer diameter of the ring 140. Thus, in the interval between D' and d' ring 140 is radially most outer part of the tool 102. As shown in Fig.7, the ring 140 is located entirely within the axial length of the insert, so that the axially rear surface 160 of the insert 120 continues axially back over the ring 140 and the other part of the insert 120 continues axially forward for the axial front surface 142 of the ring 140.

In another embodiment, and with regard to the relative radial positions and thicknesses of the insert 120, the side walls 116 and ring 140, the radial thickness of the side wall 116 is a maximum of l'sand the radial thickness of the ring 140 is the maximum of l'r. Given in example embodiments of maintain the relative radial position and thickness of these elements, so that l'rgreater than or equal to l's(i.e. l'r≥l's). The thickness l'sthe side wall 116 is sufficient, without ring 140 to ensure continuous use of demolition or excavation tool 102. Thus, if the ring is lost or otherwise removed as a result of, for example, tear or abrasion, the insert 120 has sufficient support from the side walls 116, that is to continue cutting operation. As an example, the radial thickness of the side walls 116, shown as an example, the thickness is within 1 mm≤l's≤4 mm, alternatively 2 mm≤l's≤ 4 mm Minimum thickness l'mside wall, preferably equal to 1 mm; this usually occurs in the initial part 134, which is reduced in thickness, but may be less if provided sufficient stabilization and fixation of the insert in the cavity through the other sections of the side walls.

Given as examples demolition or excavation tools described in this document can be made in any suitable way. In one given as an example of the method of manufacture the method includes the formation of the first support surface at the working end of the tool body and the support surface includes a cavity and axially projecting sidewalls, made in one piece with the housing, and education second support surface radially outside the cavity of the first bearing surface. The formation of the first and second supporting surfaces can be achieved by machining or a combination of preliminary molding by, for example, casting or stamping and machining.

The manufacturing method also includes securing arise is key to the first support surface and the fastening ring on the second support surface. Fixed ring is located radially outside of the protruding side walls, and a transition edge and the axial front surface of each of the side walls and rings are axially continuing in the rear direction of the stepped configuration. In the above example embodiments, the implementation of at least one of the fixing insertion and fastening ring includes a brazing alloy at the intersection of the insert and/or rings and the corresponding support surface.

The elements and attributes described demolition or excavation tool provide improved performance characteristics compared to conventional devices, including reduced resistance to movement, easier penetration, less dust, reduced energy consumption, less heat generation and reduced to minimum vibration. In addition, the elements and features illustrated in figure 5-7 provide data preemptive effects in reducing the number of carbide, used in box.

Although the invention is described with reference to preferred options for its implementation, specialists in the art will understand that can be done additions, deletions, modifications and changes not specifically described, not beyond RA is CI essence and scope of the invention, defined in the attached claims.

Description in the provisional patent application U.S. 60/996788 and the provisional patent application U.S. 61/064075 on the basis of which this application claims priority is incorporated here by reference.

1. Demolition or excavation tool (102), comprising a housing (104)having an installation end (106) and the working end (108), a support surface (112) at the working end (108)comprising a cavity (114) and axially projecting sidewalls (116), made in one piece with the housing (104), the insert (120)fixed in the cavity (114), containing the tip (122) on the axial front end (124), tapered front surface (126), the side surface of (128) and the transition edge (130) at the intersection of the front surface (126) and side surface (128), and ring (140)located radially outside of the protruding side walls (116), and ring (140) is made of a material with a higher hardness compared with the body (104) of the tool (102), characterized in that the axial position of the transition edge (130) and the axial position of the axially front surface (118) of the side walls (116) are essentially the same, with the axially the rear surface (160) of the insert (120) is located on the axial distance L' from the tip (122) of the insert (120), and the axial front surface is of (142) ring (140) is located on the axial distance D' from the tip (122) of the insert (120), where 0,5L'≤D'≤0,9L', preferably 0,5L'≤D'≤0,8L'.

2. The tool according to claim 1, characterized in that the axially rear surface (156) of the ring (140) is located on the axial distance d' from the tip (122) of the insert (120), where d' is greater than D', and d' is less than L', the ring (140) is radially most outer part of the tool (102) in the interval between D' and d'.

3. The tool according to claim 1 or 2, characterized in that the radial thickness of the side walls (116) is the maximum of l'sand the radial thickness of the ring (140) is the maximum of l'rand l'rgreater than or equal to l's.

4. The tool according to claim 1, characterized in that the area of the protruding side walls (116) cuts transitional edge (130) of the insert (120) in a radially inner direction.

5. The tool according to claim 1, characterized in that the axial front surface (118, 142) side walls (116) and ring (140) are arranged in axially continuing in the rear direction of the stepped configuration.

6. The tool according to claim 1, characterized in that the transition edge (130) and the conical section of the front surface (126) are inside a ballistic path formed by the tip (122) of the insert (120), the radially outer area (150, 152) the axial front surface (118, 142) side walls (116) and ring (140).

7. The tool according to claim 1, characterized in that the insert (120) anchor is in the cavity (114) solid solder.

8. Machine for removing material containing a rotating element, wherein the rotating element is mounted one or more instruments (102) according to any one of claims 1 to 7.

9. Machine of claim 8, wherein the machine for removal of the material is the machine for underground mining, machine for surface mining, machine for planning roads, machine for digging trenches or repair of roads.

10. A method of manufacturing a pneumatic or digging tool (102), including the formation of the first support surface (112) at the working end (108) of the housing (104) of the tool (102), and a support surface (112) includes a cavity (114) and axially projecting sidewalls (116), made in one piece with the housing (104), the formation of the second support surface (144) radially outside the cavity (114) of the first support surface (112), the fixing insert (120) on the first support surface (112), and insert (120) comprises a tip (122) on the axial front end (124), tapered front surface (126), the side surface (128) and the transition edge (130) at the intersection of the front surface (126) and side surface (128), and the fixing ring (140) on the second support surface (144), with fixed ring (140) is located radially outside of the protruding side walls (116), and ring (140) is full of material, with a higher hardness compared with the body (104) of the tool (102), characterized in that the axial position of the transition edge (130) and the axial position of the axially front surface (118) of the side walls (116) are essentially the same, with a transition edge (130) and the conical section of the front surface (126) is located within the ballistic path formed by the tip (122) of the insert (120), the radially outer area (150, 152) the axial front surface (118, 142) side walls (116) and ring (140).

11. The method according to claim 10, characterized in that the area of the protruding side walls (116) cuts transitional edge (130) of the insert (120) in a radially inner direction.

12. The method according to claim 10 or 11, characterized in that at least one of the fixing insert (120) and lock ring (140) includes a brazing alloy.

13. The method according to claim 10 or 11, characterized in that the axially rear surface (160) of the insert (120) is located at an axial distance L' from the tip (122) of the insert (120), and the axial front surface (142) of the ring (140) is located at an axial distance D' from the tip (122) of the insert (120), where 0,5L'≤D'≤0,9L', preferably 0,5L'≤D'≤0,8L'.



 

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2 cl, 1 dwg

FIELD: mining.

SUBSTANCE: composite cutter includes holder and replaceable working head with hard-alloy insert, which is arranged on its front part. Cylindrical cavity is made in rear end surface of replaceable working head in order to fix component parts. Replaceable working head has the possibility of free rotation relative to the holder about its longitudinal axis. It is retained against movement along that axis with locking member made in the form of radial projections on side surface of front holder part. Annular groove is provided in the cavity of replaceable head for its free rotation, and the corresponding slots are made for the holder projections to enter that groove. Replaceable working head is retained against falling out, when holder projections coincide with longitudinal slots, with a setting screw. Screw is screwed into threaded hole drilled in side surface of the head and covers one of longitudinal slots.

EFFECT: improving maintainability of the design, which is related to replacement of worn-out working part of the cutter.

2 cl, 3 dwg

Shank-type cutter // 2446283

FIELD: mining.

SUBSTANCE: shank-type cutter with base part includes shank; at that, shank carries the top of cutter made from hard-alloy material, and base part in the zone between shank and cutter top has the receiving section in which the head part is retained. Head part includes circumferential surface for removal of the cut material, which converges in the direction of the cutter top. At that, as per the first version, the head part is retained relative to the base part with possibility of being turned, and surface for removal of the cut material ends in the area of the base part end receiving the cutter top. As per the second version, head part has limit stop (support section) and/or mating surface, which restricts the erection movement of the head part on base part on support surface of the base part. As per the third version, base part has a clamping sleeve in the area of the shank. At that, head part is put on clamping sleeve, and at that, head part retains the clamping sleeve in pre-load position.

EFFECT: reducing the costs for elements at optimised wear.

12 cl, 4 dwg

FIELD: mining equipment.

SUBSTANCE: the invention relates to rock-cutting equipment, in particular, to rock cutters for tunneling and getting machines. The cutter includes cylindrical holder and the operating head with conic section fitted with hard-alloy insert and reinforcing element in the form of hard-alloy rings with ring made of less dense material between them. The operating head of the cutter is has a rotating box with side conic surface on the side of hard-alloy insert, which is installed on the holder. Furthermore, the hard-alloy rings and ring spacers are fixed on the box, their contacting faces have spline keys and corresponding slots, and the side conic surface is fitted with spiral or inclined blades, reinforced with wear-proof material.

EFFECT: increased operation effectiveness through increasing operation capacity of ring spacers.

2 cl, 3 dwg

Tail drilling bit // 2434999

FIELD: mining.

SUBSTANCE: tail drilling bit includes head of bit and shank of bit; at that, shank of bit is equipped with clamping sleeve in which shank of bit is fixed in the direction of its longitudinal axis by means of captive coupling and has the possibility of free rotation about its longitudinal axis. Clamping sleeve is equipped with fasteners which are engaged with circumferential slot of attachment section of the bit shank so that clamping sleeve is retained so that it can be rotated, however with captive coupling in axial direction of the bit shank. The latter has shank elongation on its end facing from the bit head; at that, the above shank elongation has tool location element. The latter is accessible through intermediate area of shank elongation in the bit axial direction, which is shifted backwards (retracted) relative to external surface of the bit shank and/or relative to external surface of clamping sleeve.

EFFECT: simpler erection and removal of the bit through mounting hole for the bit attachment.

10 cl, 2 dwg

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

FIELD: machine building.

SUBSTANCE: cutter consists of cutting point made out of silicon-carbide diamond composite and of case made out of metallic material. Also material of the case possesses higher coefficient of thermal expansion, than composite of the cutting point. Notably, the cylinder part of the point and internal surface of the case cavity of the cutter have coating. Heated metal, able to combine with any coating, is introduced into a circular cavity formed between the cylinder part of the point and a wall of the case cavity, thus fixing the point in the case. Upon successive cutter cooling, the case shrinks exerting sufficient pressure on solidified metal and presses it to cylinder external surface of the point.

EFFECT: upgraded strength of fixing cutting point in case of cutter.

19 cl, 2 dwg

FIELD: mining industry, particularly miscellaneous items relating to machines for slitting or completely freeing the mineral from the seam.

SUBSTANCE: device comprises working head, shank with groove for clamping sleeve receiving and with seating surface for protective member installation in its working position. The device also has split clamping sleeve and protective member installed on clamping sleeve so that protective member may perform axial movement. Lower protective member base is spaced a distance from axis of device symmetry relative shank end. The distance is not less than 0.45 of clamping sleeve length measured along the same axis. Protective member thickness is 0.025-0.25 of clamping collar length. Protective member may be formed as flat washer, as plate-like washer, as washer with annular extension located on upper end thereof and cooperating with end working head surface, as washer with additional axial annular extension formed on lower end thereof and cooperating with cutter holder or as at least two washers.

EFFECT: reduced labor inputs for device assemblage in the field.

6 cl, 5 dwg

FIELD: mining machinery building, particularly mining machine structures.

SUBSTANCE: cutting tool has holder including shank and head made as truncated cone. Hard-alloy conical insert having apex and base is installed on end surface of the head. Holder head is provided with cylindrical extension arranged on end surface thereof and coaxial thereto. Hard-alloy insert has cylindrical groove for above cylindrical extension receiving. End surface of holder head is superposed with surface of conical hard-alloy insert base. Conical part of holder head may be enclosed with hard-alloy insert base.

EFFECT: increased operational reliability and reduced hard-alloy consumption for cutting tool production.

3 dwg

FIELD: mining picks and holders therefore, particularly means to retain regulation tools or drilling bits used in mining industry, for trench digging-out and for building works performing.

SUBSTANCE: cutting unit comprises retainer and cutting tool body installed in retainer orifice, as well as fixing bush adapted to retain cutting tool body inside the orifice in axial direction and to freely rotate cutting tool body about longitudinal axis. Fixing bush has tongues bent inwards, which pass into groove formed in cutting tool body shank. Fixing bush has configuration to facilitate small particle removal from the groove during cutting operation performing.

EFFECT: increased ability of free tool rotation and minimized tool clogging with compacted small particles, which prevent free tool rotation.

6 cl, 9 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: 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.

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: 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 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

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.

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

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