A device for the destruction of mineral and synthetic materials

 

(57) Abstract:

The invention relates to mining and construction. The instrument for the destruction of the mineral and artificial materials contains a working head with carbide insert, shank, split clamping sleeve with a locking element and a protective element. The holder has the shape of a body of rotation and with a groove for accommodating the clamping sleeve, with an annular mounting surface for installation of a protective element in its working position and with the end part. The protective element is mounted on the clamping sleeve with the possibility of axial movement, has a through axial hole, a diameter which exceeds the diameter of the Seating surface and is displaced along the longitudinal axis of symmetry of the device relative to the facing to the working head end of the clamping sleeve for a distance not less than 0.60 and not more than 0.85 of the length clamping sleeve on the same axis. The diameter of the Seating surface of the tool holder exceeds the diameter of its end portion. Increases reliability of the device. 19 C.p. f-crystals, 12 ill.

The invention relates to the mining industry, in particular to a tool for destruction of mineral and synthetic materials, and can be used in the source in the ground, as well as in the working bodies of construction and road machinery in the construction and repair of roads.

A well-known tool for the destruction of mineral and synthetic materials, which contains a working head mounted on it with a insert of cemented carbide material having the form of a body of rotation of a holder with a groove for accommodating the clamping sleeve, with an annular mounting surface for installation of a protective element in its working position and with the end part made of elastic material split clamping sleeve has a cylindrical shape with retaining elements and a protective element with a through axial hole (see , for example, application Germany (DE) 19630642, CL E 21 35/18, publ. 05.02.98).

In the known device for placing the holder in the socket of the tool holder clamping sleeve is deformed by the application to the device of the shock load in the axial direction. The disadvantages of the known technical solutions can be attributed to the large volume of work on the installation of the device in the holder, which is caused by the need to ensure deformation of the clamping sleeve in cramped conditions, namely when replacing a failed device directly on your body. In addition, geometric shapes, that may entail a violation of the conditions of free rotation of the tool holder in the channel of the tool holder during operation.

The closest in technical essence and the achieved technical result is an instrument for the destruction of mineral and synthetic materials, which contains a working head mounted on it with a insert of cemented carbide material having the form of a body of rotation of a holder with a groove for accommodating the clamping sleeve, with an annular mounting surface for installation of a protective element in its working position and with the end part made of elastic material split clamping sleeve has a cylindrical shape with a locking element mounted on the clamping sleeve with the possibility of axial movement of the protective element with a through axial hole, a diameter which exceeds the diameter of the Seating surface (see, for example, the application Germany (DE) 19720635, CL E 21 35/18, publ. 19.11.98).

Known technical solution partially eliminates the disadvantages described above analogue, because it eliminates the need for a dynamic influence on the clamping sleeve when mounting the device. In this case, the clamping sleeve is deformed to size, obespechenie device is inserted into the socket of the tool holder and then slip the protective element on the landing surface of the holder, freeing the clamping sleeve. The clamping sleeve under the action of forces of elasticity extends in the channel of the tool holder and secures the device in the past. The disadvantages of the known technical solutions include the need is strong deformation of the clamping sleeve for receipt of such diameter that would be less than the diameter of the channel in the holder. After such compression in the clamping sleeve appear permanent deformation, which after removing the protective element can cause the clamping sleeve will not be enough to securely hold the tool holder in the tool holder. Pre-compression during Assembly of the device and the subsequent expansion of the clamping sleeve can lead to the violation of its geometric shape that can cause rotation of the tool holder during operation.

The invention is directed to the task of creating such a tool for the destruction of mineral and synthetic materials, which would provide reliable fastening device in the channel of the tool holder while ensuring easy mounting of the device under operating conditions. The technical result that can be obtained with the implementation of the invention, zaklyuchaem clamping sleeve a specific geometric shape, providing free entry into the channel of the tool holder.

The problem is solved due to the fact that the instrument for the destruction of the mineral and artificial materials protective element is displaced along the longitudinal axis of symmetry of the device relative to the facing to the working head end of the clamping sleeve for a distance not less than 0.60 and not more than 0.85 of the length clamping sleeve on the same axis, and the diameter of the landing surface is greater than the diameter of the end portion. This technical solution provides for the giving of a conical form insert in the tool holder to the end of the device that provides reduced installation complexity in operating conditions, while reducing the magnitude of deformation of the clamping sleeve protective element, thereby increasing the reliability of the machine and mounting of the tool holder in the tool holder.

In addition, the protective element is designed in the form of a washer flat shape. Under this option, the structural embodiment of the protective element reduces abrasive wear of the device during its operation, which improves the conditions of rotation of the toolholder in the channel of the tool holder.

In addition, the washer is provided with axial annular ledge for Rainie of the toolholder relative to the clamping sleeve and the socket of the tool holder and, therefore, to improve the conditions of rotation of the toolholder.

In addition, the protective element is designed in the form of a washer having in cross section a U-shaped form. Under this option, the structural embodiment of the protective element provides additional protection tool holder and details of the device from the products of destruction.

In addition, the washer is provided with axial annular ledge for placement in a corresponding annular groove on the holder that allows you to provide better centering of the tool holder relative to the clamping sleeve and the socket of the tool holder and, consequently, to improve the conditions of rotation of the toolholder.

In addition, the protective element is designed in the form of Belleville washers form. Under this option, the structural embodiment of the protective element can be reduced dynamic loads on the parts of the device, which increases the operational reliability of the device.

In addition, the washer is provided with axial annular ledge for placement in a corresponding annular groove on the holder that allows you to provide better centering of the tool holder relative to the clamping sleeve and the socket of the tool holder and, consequently, improve the STV exceeds the total length of the groove for accommodating the clamping sleeve and the end portion on the same axis, that provides a further reduction in the complexity of mounting the unit in the holder while reducing wear of the socket holder.

In addition, the locking element is designed as at least one protrusion, which is located on the inner surface of the clamping sleeve, the holder is made with an annular recess for accommodating the projection on the clamping sleeve. Under this option, the structural embodiment improves the reliability of connection of the holder with the clamping sleeve.

In addition, the locking element is designed as three protrusions that are evenly spaced on a circle whose center lies on the longitudinal axis of symmetry of the device, which ensures the improvement of the conditions of rotation of the holder relative to the tool holder due to the centering of the tool holder relative to the clamping sleeve.

In addition, the projection on the clamping sleeve is made in the form of curved tongue that reduces the complexity of manufacture of the device.

In addition, the length of the clamping sleeve along the longitudinal axis of symmetry of the device is less than the length of the groove for accommodating the clamping sleeve on the same axis, which provides additional reducing installation complexity ustrnul sleeve, that allows to simplify the design.

In addition, at least one portion of each end surface, forming a slit clamping sleeve is parallel to the longitudinal axis of symmetry of the device. This option is meaningful implementation of the device allows to improve the yield of products of destruction of an annular channel formed by the inner surface of the clamping sleeve and the outer surface of the holder that improves the conditions of rotation of the holder relative to the tool holder.

In addition, at least one portion of each end surface, forming a slit clamping sleeve is at an angle to the plane passing through the longitudinal axis of symmetry of the device, which can further improve the yield of products of destruction of an annular channel formed by the inner surface of the clamping sleeve and the outer surface of the holder and, consequently, to improve the conditions of rotation of the holder relative to the tool holder.

In addition, the angles opposite end surfaces forming a slit clamping sleeve equal, which allows to reduce the complexity of manufacture of the device.

In addition, cadastration execution device allows to improve the yield of products of destruction of an annular channel, formed by the inner surface of the clamping sleeve and the outer surface of the holder that improves the conditions of rotation of the holder relative to the tool holder.

In addition, the insert includes a head portion, the base and located between the head part and the base, the intermediate part, which is formed by a body of rotation with the outer side surfaces of the concave shape, with the head part is formed by a body of rotation with the outer side surface of a convex shape, and the side surface of the head insert smoothly mated with the side surfaces of the intermediate part. Under this option, the structural embodiment of the insert additionally improve the conditions of rotation of the tool holder in the tool holder and at the same time keeping the stability of the level of stress on parts of the device for the entire period of operation of the latter, which allows you to increase the operational reliability of the device.

In addition, the length of the intermediate portion of the insert along the longitudinal axis of the device does not exceed the length of the head portion of the insert on the same axis.

In addition, the length of the head part of the insert along the longitudinal axis of the device does not exceed the length of the intermediate portion of the insert on the same axis.

A device for the destruction of the mineral and artificial materials contains the working cylinder 1, which can be of any geometric shape, preferably the shape of the body of rotation. At the end of the working head 1 is fixed to the insert 2 of the carbide material. Insert 2 preferably has the shape of a body of rotation and can be mounted on the working head 1 using any known permanent or detachable connection, preferably by soldering.

The holder 3 has the shape of a body of rotation and may be made integral with the working cylinder 1, or connected with the latter by means of detachable or permanent connection. The holder 3 is made with a groove 4 for accommodating the clamping sleeve 5. The shank is the end part 8. The clamping sleeve 5 has a cylindrical shape and is made of a split resilient material, for example of steel. The clamping sleeve 5 is made with a locking element 9, which is designed for fixing the holder 3 relative to the clamping sleeve 5. On the clamping sleeve 5 is installed with the possibility of axial movement of the protective element 7 with a through axial hole 10 (Fig.9).

The protective element 7 is designed to reduce wear facing each other of the surfaces, respectively, of the tool holder 3 and the tool holder 11 (Fig.11 and 12), as well as to prevent the ingress of products of destruction (AC) in the annular channel 12 formed by the inner surface of the clamping sleeve 5 and the side surface of the holder 3.

The diameter D of the through hole 10 in the protective element 7 is greater than the diameter d of the Seating surface 6 on the holder 3, that is, the condition D>d. The protective element 7 is displaced along the longitudinal axis 13 of the symmetry of the device relative to the facing to the working cylinder 1 end 14 of the clamping sleeve 5 at a distance To not less than 0.6 and not more than 0.85 of the length m of the clamping sleeve 5 on the same axis 13, that is, the condition: 0.60 M < K < 0,85 M as a base point 15 which is defined Velicina sleeve 5 from the side of the working head 1.

The above values range geometrical relations between the parts of the device are obtained empirically. It should be noted that when the output of the geometrical relations for the upper limit of the specified range may occur inadvertently sliding off of the protective element 7 with the clamping sleeve 5 during transportation of the device or when it is installed in the tool holder 11, and when the output of the geometric ratios for the lower limit of the specified range of the clamping sleeve 5 does not accept conical shape, which is optimal for mounting the device in the holder 11.

The diameter d of the Seating surface 6 of the tool holder 3 exceeds the diameter of the end portion 8 of the holder 3, i.e., the condition:<d. The implementation of this ratio allows us to give the clamping sleeve 5 the shape of a truncated cone when mounting the device. When not running the above ratio between the diameters of the end portion 8 and the Seating surface 6 of the holder 3 of the end portion 8 of the holder 3 prevents the formation of conical clamping sleeve 5 when the device is mounted in the tool holder 11.

The protective element 7 can have any geometric shape, mainly the shape of the body of rotation,eticheskoi forms when installing the device in the holder. The most appropriate is a variant of the construction execution of the protection element 7, whereby it is made in the form of a washer flat shape (Fig.2), that is, the end surface of the washer represent a plane. Under this option, the structural embodiment of the protective element 7 preferably, he was provided with axial annular projection 16 (Fig.3 and 11) to be placed in a corresponding annular groove 17, is made on the holder 11. Axial annular projection 16 and the corresponding annular groove 17 can be of any geometric shape.

The protective element 7 may be made in the form of a washer having in cross section a U-shaped form (Fig.12). In this case, the most appropriate for the puck, has a cross-sectional U-shaped form, was made with an annular axial projection 16 for placement in a corresponding annular groove 17 on the holder 11.

The protective element 7 may be made in the form of Belleville washers form (Fig. 9). In this case, the most appropriate, so that the washer having a disc shape, was made with an annular axial projection 16 for placement in a corresponding annular groove 17 on the holder 11.

is metrie device exceeds the total length L of the groove 4 to accommodate clamping sleeve 5 and the length of S end portion 8 of the holder 3 on the same axis 13, i.e. the condition: M>L+S. the Specified ratio of the geometric parameters of the components of the unit determines that the end of the clamping sleeve 5 is an end face holder 3 (Fig.1, 2 and 11). Under this option, the constructive execution of the clamping sleeve 5 at its locking element 9 can be made in the form of at least one protrusion, which is located on the inner surface of the clamping sleeve 5, and the holder 3 holds in this case with the annular recess 18 for accommodating the protrusion forming the locking element 9 in the clamping sleeve 5 (Fig.1, 2, 4 and 11).

The specified protrusion forming the locking element 9 in the clamping sleeve 5 may be made as a separate part that is fixed on the clamping sleeve 5 by means of detachable or permanent connection, or formed by extrusion plot clamping sleeve 5 inside, that is, may be made integral unit with the clamping sleeve 5.

The most feasible is the implementation of the locking element 9 in the form of three protrusions (Fig. 6 and 8), which are evenly spaced on a circle whose center lies on the longitudinal axis 13 of the symmetry of the device. Forming the locking element 9, the projection on the clamping sleeve 5 may be made in the form of figure-shaped through slit. Then plot the clamping sleeve 5, which is limited to the specified U-shaped through slit, folded into the internal cavity of the clamping sleeve 5.

Alternatively structural embodiment of the device, the length m of the clamping sleeve 5 along the longitudinal axis 13 of the symmetry of the device may be less than the length L of the groove 4 to accommodate clamping sleeve 5 on the same axis 13 (Fig.3 and 12), i.e. the condition: M<L. the Specified ratio of the geometric parameters of the components of the unit determines that the clamping sleeve 5 may be located within the boundaries of the groove 4 on the holder 3. Under this option, the constructive execution of the clamping sleeve 5 at its locking element 9 can be in the form of the end surface 19 of the clamping sleeve 5 (Fig.7 and 12).

Split clamping sleeve 5 has an end surface 20 and 21, which form a slit clamping sleeve 5, performs the functions of the additional channel 22 for the passage of products of destruction (AC). Configuration additional channel 22 for the passage of products of destruction can be any. Preferably, at least one portion of each of the end surfaces 20 and 21, forming a slit clamping sleeve, is parallel to the longitudinal axis 13 of symmetry Stroiteley axis 13 of symmetry of the device. One of the variants of the constructive execution of the clamping sleeve 5 provides that at least one portion of each of the end surfaces 20 and 21, forming a slit clamping sleeve 5, would be located at an angle to the plane passing through the longitudinal axis 13 of the symmetry of the device (Fig.2 and 6). Thus the angles opposite end surfaces 20 and 21, forming a slit clamping sleeve 5 may be equal. According to another variant of the constructive execution of the clamping sleeve, each end surface 20 and 21, forming a slit clamping sleeve 5 may take the form of a helical surface (Fig.7).

Insert 2 of the carbide material may contain the head part 23, the base 24 and located between the head part 23 and the base 24 of the intermediate portion 25 (Fig.10). The intermediate portion 25 of the insert 2 is formed by a body of rotation with the outer side surfaces of the concave shape. While the head portion 23 of the insert is formed by a body of rotation with the outer side surface of a convex shape. Side surface of the head part 23 of the insert 2 smoothly mated with the side surfaces of the intermediate part 25. One of the options for structural embodiment of the device, the length E of the intermediate part 25 in the same axis 13, that is, the condition: E<f. alternatively, the length F of the head portion 23 of the insert 2 to the longitudinal axis 13 of the symmetry of the device should not exceed the length (E) of the intermediate portion 25 of the insert 2 on the same axis 13, that is, must satisfy the condition: F<that is,

First carry out installation of the device in the holder 11, which is fixed on the working body(the drawings are not depicted). To this end, the clamping sleeve 5 mounted on the holder 3 by placing it into the annular groove 4. Then the clamping sleeve 5 is compressed to a diameter smaller than the diameter D of the protective element 7, and put on her protective element 7, placing it at a certain distance from the facing to the working cylinder 1 end 14 of the clamping sleeve 5. After the protective element 7 will occupy a specified position, the clamping sleeve 5 is released and it is under the action of forces of elasticity is expanding. The protective element 7 prevents further expansion of the clamping sleeve 5, and it is due to the application offset from its center of effort, created a protective element 7, takes the form of a truncated cone, the top of which is oriented in the direction of the end portion 8 gorgeousa the specified form of the clamping sleeve 5.

Further, the device is inserted into the socket of the tool holder 11 to the interaction between the protective element 7 with an end face of the tool holder 11. It should be noted that making the clamping sleeve 5 forms a truncated cone delivers smooth its entry into the slot of the tool holder 11. Then to the working cylinder 1 exert axial force, under which the protective element 7, resting on the end face of the tool holder 11 is moved in the axial direction of the clamping sleeve 5 in the direction of the working cylinder 1 and the holder 3 together with the clamping sleeve 5 is immersed into the slot of the tool holder 11.

The specified immersion will continue to until the protective element 7 is fully moved to the seat surface 6. When the protective element 7 will take its operating position on the Seating surface 6 of the tool holder 3, it will release the clamping sleeve 5, which under the action of forces of elasticity will be expanded and pressed against the walls of the channel in the holder 11. Thus, the clamping sleeve 5 will be fixed relative to the tool holder 11. Axial movement of the tool holder 3 relative to the clamping sleeve 5 by one of the following structural embodiment of the device (Fig.1, 2 and 11) prevents the locking element 9 in the form of the 18 on the holder 3. Alternatively structural embodiment of the device (Fig.3 and 12) the axial displacement of the tool holder 3 relative to the clamping sleeve 5 prevents the locking element 9 in the form of the end surface 19 of the clamping sleeve 5, which after installation of the device interacts with the end part 8 of the tool holder 3.

When the movement of the working body, which is fixed by means of detachable or permanent connection of the tool holder 11, in cooperation with destructible material enters the working cylinder 1 of the device with the insert 2 of the carbide material. As a result of influence of external forces arising in the process of interaction of the working head 1 and the insert 2 with destructible material, the holder 3 is rotated around the longitudinal axis 13 of the symmetry of the device in the holder 11, thereby providing uniform wear of interacting with destructible material components of the unit. The protective element 7 prevents the interaction with destructible material of the tool holder 11, promotes better rotation of the device in the holder and reduces wear of the working head 1 and the tool holder 11.

After wear of the insert 2 or the working head 1, or their failure are replacing a failed Usam storage device may cause the residual deformation of the clamping sleeve 5, i.e., the clamping sleeve 5, the receiving under the action of the protective element 7 the shape of a truncated cone, partially retains this form and after placement of the device in the holder 11. Even in this case, the reliability of the fastening device in the holder will continue as addressed to the working cylinder 1 of the most loaded end of the clamping sleeve 5 is practically not deformed during storage.

1. A device for the destruction of mineral and synthetic materials, comprising a working head mounted on it with a insert of cemented carbide material having the form of a body of rotation of a holder with a groove for accommodating the clamping sleeve, with an annular mounting surface for installation of a protective element in its working position and with the end part made of elastic material split clamping sleeve has a cylindrical shape with a locking element mounted on the clamping sleeve with the possibility of axial movement of the protective element with a through axial hole, a diameter which exceeds the diameter of the Seating surface, characterized in that the protective element is displaced along the longitudinal axis of symmetry of the device relative to the facing to the working head end of the clamping VTI surface is greater than the diameter of the end portion.

2. The device under item 1, characterized in that the protective element is designed in the form of a washer flat shape.

3. The device according to p. 2, wherein the washer is provided with axial annular ledge for placement in a corresponding annular groove on the holder.

4. The device under item 1, characterized in that the protective element is designed in the form of a washer having in cross section a U-shaped form.

5. The device according to p. 4, wherein the washer is provided with axial annular ledge for placement in a corresponding annular groove on the holder.

6. The device under item 1, characterized in that the protective element is designed in the form of Belleville washers form.

7. The device according to p. 6, wherein the washer is provided with axial annular ledge for placement in a corresponding annular groove on the holder.

8. Device according to one of paragraphs.1-7, characterized in that the length of the clamping sleeve along the longitudinal axis of symmetry of the device exceeds the total length of the groove for accommodating the clamping sleeve and the end portion on the same axis.

9. The device under item 8, characterized in that the locking element is designed as at least one visually to accommodate projections on the clamping sleeve.

10. The device according to p. 9, characterized in that the locking element is designed as three protrusions that are evenly spaced on a circle whose center lies on the longitudinal axis of symmetry of the device.

11. The device under item 9 or 10, characterized in that the projection on the clamping sleeve is made in the form of curved tongue.

12. Device according to one of paragraphs.1-7, characterized in that the length of the clamping sleeve along the longitudinal axis of symmetry of the device is less than the length of the groove for accommodating the clamping sleeve on the same axis.

13. The device according to p. 12, characterized in that the locking element is designed as end surface of the clamping sleeve.

14. Device according to one of paragraphs.1-13, characterized in that at least one portion of each end surface, forming a slit clamping sleeve is parallel to the longitudinal axis of symmetry of the device.

15. Device according to one of paragraphs.1-14, characterized in that at least one portion of each end surface, forming a slit clamping sleeve is at an angle to the plane passing through the longitudinal axis of symmetry of the device.

16. The device according to p. 15, characterized in that the angles opposite tor causesa fact, each end surface, forming a slit clamping sleeve has the shape of a helical surface.

18. Device according to one of paragraphs. 1-17, characterized in that the insert includes a head portion, the base and located between the head part and the base, the intermediate part, which is formed by a body of rotation with the outer side surfaces of the concave shape, with the head part is formed by a body of rotation with the outer side surface of a convex shape, and the side surface of the head insert smoothly mated with the side surfaces of the intermediate part.

19. The device under item 18, characterized in that the length of the intermediate portion of the insert along the longitudinal axis of the device does not exceed the length of the head portion of the insert on the same axis.

20. The device under item 18, characterized in that the length of the head portion of the insert along the longitudinal axis of the device does not exceed the length of the intermediate portion of the insert on the same axis.

 

Same patents:

The invention relates to the mining industry, namely, devices for mounting cutters Executive bodies of mining machines

The invention relates to the mining industry and can be used in the manufacture of cutting tools for mining and road machines

The invention relates to the mining industry, namely the cutters to equip the Executive bodies of the treatment and tunnel mining machines

Rock cutting cutter // 2183270
The invention relates to rock-installations, road and mining industry

The invention relates to the mining industry, namely to the incisors of the Executive bodies of the treatment and tunnel mining machines

The invention relates to the mining industry

The invention relates to the mining industry and can be used in the manufacture of cutting tools for mining and road machines

The invention relates to mining and construction, in particular to the working tools of devices designed for cleaning surfaces from contamination, as well as for fracture of brittle materials and can be used for removal of ice and/or snow from the roads or pavements, for example, roads or runways of airfields

The invention relates to the mining industry, in particular to rock cutting tools for mining and construction machines, and can be used in the destruction of rocks and artificial materials, as well as when cleaning surfaces from ice and/or snow

The invention relates to the mining industry

The invention relates to the mining industry, in particular to rock cutting tools for mining and construction machines, and can be used in the destruction of rocks and artificial materials, as well as when cleaning surfaces from ice and/or snow

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: 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 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

FIELD: mining.

SUBSTANCE: cutter for mining machines includes holder with axial channel in which a set of wear-resistant elements in the form of external and internal cores is fixed; working heads of the above cores face one and the same side. Shank of each external core is provided with mating conical groove relative to working head of internal core. Rear part of shank of external core can be made from less wear-resistant material in comparison to head part.

EFFECT: reducing hard alloy consumption and improving cutter operating efficiency.

2 cl, 1 dwg

FIELD: mining.

SUBSTANCE: cutter includes cylindrical holder and working head with conical part equipped with button insert and reinforced element in the form of hard-face rings between which rings made from material of lower hardness and interacting with them are located. Cutter is provided with frame installed on working head so that it can be rotated; at that, hard-face and intermediate rings are installed on the frame. As per the first version, intermediate rings are provided with slots throughout the height, and edges of hard-face rings contacting with them on the side of their bigger base are provided with projections arranged in slots of intermediate rings. As per the second version, contacting edges of hard-face and intermediate rings are provided with congruent projections and cavities having the shape of sine curve in front plane.

EFFECT: improving cutter operating efficiency.

3 cl, 2 dwg

FIELD: mining.

SUBSTANCE: cutting tool for mining machines includes holder with axial conical channel where there fixed is a shank of cutting tip formed by some close-ended symmetrically arranged fixing elements with conical operating part. Hard-alloy elements are done in a form of central stem of conical shape and blades. The blades have trapezoidal form in vertical plane, the larger base of which is oriented towards the holder, and are installed between fixing elements surfaces facing each other flush with their outer surface, note that there is an annular bore in the lower end of the holder and blades' upper ends have projections arranged in annular bore of the holder.

EFFECT: reduction of hard-alloy consumption and increase of cutting tool efficiency by excluding the possibility of worn cutting tools fragments getting under the other cutting tools.

2 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to cutting tools. Particularly, it relates to radial cutter of header, header and method of cutter production. This cutter comprises shank, head and insert. Said shank features out-of-round cross-section. Said head comprises point area remote from shank and lateral surfaces connecting the front and rear surfaces. Insert is arranged at the point front end. Said insert has body made of tungsten carbide and element made of superhard material. The latter extends into said body and fused therewith. At least a part of superhard material element is exposed at insert cutting surface. At least a part of head front surface is made of superhard material and spaced from the element made of superhard material.

EFFECT: better tool characteristics.

22 cl, 34 dwg

Up!