Mineral and artificial material cutting device

FIELD: mining industry, particularly for mining operation and construction and repair work performing.

SUBSTANCE: device has rotary cutter with shank and working head having annular support surface. Device also comprises cuter holder having orifice for cutter shank receiving and annular support surface, stop member for cutter shank fixation in cutter holder orifice and thrust member rotary arranged between working head and cutter holder. Thrust member has upper base and lower base carrying projection. Thrust member has additional projection located on upper base thereof and annular support surface cooperating with that of working head. Projection of lower base has annular support surface to cooperate with that of cutter holder. Width of support surface formed on additional projection is 0.15-1.0 of that of support surface of main thrust member projection. Width of support surface formed on additional projection is 0.15-1.0 of that of support surface of working head.

EFFECT: increased service life due to uniformity of cutter rotation during operation, increased reliability due to reduced friction between cooperating surfaces of thrust member, working head and cutter holder.

13 cl, 5 dwg

 

The invention relates to the mining industry and construction, in particular to a device for the destruction of mineral and synthetic materials, and can be used in the extraction of minerals, as well as when carrying out construction and repair work.

A device for the destruction of mineral and synthetic materials, which includes a rotary cutter with a working head, which is the base surface of the annular shape, and with the shank, the tool holder with a hole to accommodate the shank of the cutter and with the thrust surface of the ring-shaped locking cement for fixing shank of the cutter in the hole of the tool holder and mounted between the working cylinder, cutter and tool holder thrust element (see, for example, U.S. patent No. 4844550, CL E 21 25/12, publ. 04.07.1989).

In the known device the bearing surface of the cutter head and the thrust surface on the holder have a conical shape. Between these surfaces is resistant element, which has a response surface. While the thrust element fixed against rotation relative to the tool holder. When the device is working cylinder cutter interacts with destructible material and due to the resulting torque is the rotation of the cutter relative to the tool holder. To the disadvantage of the known device can be attributed to the irregularity of rotation of the cutter. This circumstance is caused by the fact that the supporting surface of the working head cutter has a large area of contact with the corresponding surface of the thrust element, i.e. the rotation of the cutter will be to resist the frictional force arising from the interaction of these surfaces. In addition, the penetration of products of destruction of the material (dross) between these surfaces will only increase the frictional forces impeding the rotation of the cutter. The uneven rotation of the cutter relative to the tool holder will result in uneven wear of the cutter and, consequently, reduce its service life.

The closest in technical essence and the achieved technical result is a device for the destruction of mineral and synthetic materials, which contains a rotary cutter with a working head, which is the base surface of the annular shape, and with the shank, the tool holder with a hole to accommodate the shank of the cutter and with the thrust surface of the ring-shaped locking element for locking the shank of the cutter in the hole of the tool holder and mounted between the working cylinder, cutter and tool holder rotatably resistant element with the upper base and the lower base, which is the protrusion (see, for example, patent RF №2002050,CL E 21 25/38, publ. 30.10.1992).

Known technical solution partially eliminates the disadvantages described above are similar, because the thrust element is mounted for rotation. Enabling rotation of the thrust element relative to the tool holder and cutter allows you to reduce the unevenness of rotation of the cutter in contact with rubble between interacting surfaces. The disadvantages of the known technical solutions can be attributed to the fact that the bearing surface of the cutter head and the thrust surface of the holder have a substantial area of contact with the corresponding surfaces of the thrust element, i.e. the rotation of the cutter will be to resist the frictional force arising from the interaction of these surfaces. It should be noted that in the process of destruction of the material in the gaps between the thrust element and the cutting head and between the thrust element and the tool holder appears dross, which leads to a considerable increase in the coefficient of friction between the cooperating surfaces of the said parts of the device. This circumstance leads to an increase in the magnitude of the frictional forces impeding the rotation of the cutter, and, consequently, non-uniformity of rotation of the cutter. As mentioned above, the unevenness of rotation of the cutter when the destruction of the Mat is the real causes uneven wear of its cutting head and to the need for premature replacement of worn-out cutter.

The invention is directed to the task of creating such a device for the destruction of mineral and synthetic materials, which would increase its service life due to the uniform rotation of the cutter during its operation. The technical result that can be obtained with the implementation of the invention is to reduce the friction between the cooperating surfaces of the thrust element, the tool head and tool holder.

This goal is achieved due to the fact that the device for destruction of mineral and synthetic materials, which includes a rotary cutter with a working head, which is the base surface of the annular shape, and with the shank, the tool holder with a hole to accommodate the shank of the cutter and with the thrust surface of the ring-shaped locking element for locking the shank of the cutter in the hole of the tool holder and mounted between the working cylinder, cutter and tool holder rotatably resistant element with the upper base and the lower base, which is the protrusion of the thrust element is designed with located on the upper basis of the additional ledge with hard surface ring-shaped for engagement with the bearing surface of the working head, and located at the bottom base of pornogalereja the main ledge performed with the bearing surface of the ring form to interact with the thrust surface of the tool holder, the width of the thrust surface for extra protrusion of the thrust element is more than 0.15 and less than 1.0 on the width of the support surface on the main ledge of the thrust element, the width of the thrust surface for extra protrusion of the thrust element is more than 0.15 and less than 1.0 on the width of the support surface of the working head.

In addition, this goal is achieved due to the fact that the bearing surface on the main ledge thrust element smoothly mated with the lower base resistant cement.

In addition, this goal is achieved due to the fact that the hard surface for extra protrusion of the thrust element smoothly mated with the upper base of the thrust element.

In addition, this goal is achieved due to the fact that the bearing surface on the main ledge of the thrust element has a flat shape.

In addition, this goal is achieved due to the fact that the hard surface for extra protrusion of the thrust element has a flat shape.

In addition, this goal is achieved due to the fact that the bearing surface on the main ledge of the thrust element has in cross section the shape of an arc.

In addition, this goal is achieved due to the fact that the hard surface for extra protrusion of the thrust element has poperen the m-section the shape of an arc.

In addition, this goal is achieved due to the fact that the hardness of the thrust element is not less than the hardness of respectively supporting surface of the working head and the thrust surface of the tool holder.

In addition, this goal is achieved due to the fact that the wear resistant element is not lower than the wear resistance, respectively, of the support surface of the working head and the thrust surface of the tool holder.

In addition, this goal is achieved due to the fact that the thrust element is designed in the form of a washer.

In addition, this goal is achieved due to the fact that the internal diameter of the washer does not exceed the diameter of the hole in the tool holder.

In addition, this goal is achieved due to the fact that the locking element is designed in the form of a split sleeve of resilient material.

In addition, this goal is achieved due to the fact that the internal diameter of the washer is not less than the outer diameter of the split sleeve in a free state.

The invention is illustrated by drawings, where figure 1 shows a device for the destruction of mineral and synthetic materials, figure 2 is the same when you build it and figure 3-5 - ways constructive execution of the thrust element.

A device for the destruction of the mineral and artificial materials contains the rotary cutter 1 with the working head is th 2 and shank 3. The working head 2 and a shank 3 have the shape of a body of rotation. At the working head 2 may be secured in the insert of cemented carbide material. The tool holder 4 is made with a hole 5 for the accommodation of the shank 3 of the cutter 1 and fixedly mounted on the housing of the working body (the drawings are not depicted) by means of detachable or permanent connection. When the shank 3 of the cutter 1 is mounted in the opening 5 of the holder 4 with the possibility of rotation about the longitudinal axis 6 of symmetry. The device includes a locking element 7, which is designed to lock against axial movement of the shank 3 of the cutter 1 in the opening 5 of the holder 4. The locking element 7 may be of any known construction for a smooth rotation of the shank 3 of the cutter 1 in the opening 5 of the holder 4, but preventing mutual axial displacement of the specified nodes. Between the working cylinder 2 of the cutter 1 and the holder 4 is thrust element 8. The thrust element 8 is mounted for rotation around the longitudinal axis 6 of the symmetry relative to the cutting tool 1 and the tool holder 4. At the working head 2 of the cutter 1 is the reference surface 9 of the ring form (figure 2). The tool holder 4 is made with a thrust surface 10 of the ring shape. The thrust element 8 has an upper base 11 and the bottom base 12. On the lower base 12 resistant cell battery (included) is that 8 is the main ledge 13. On the upper base 11 of the thrust element 8 is an additional ledge 14. Additional protrusion 14 of the thrust element 8 is made with a hard surface 15, which has a ring shape and is designed to interact with the support surface 9 on the working head 2 of the cutter 1. The main ledge 13 of the thrust element 8 is made with the supporting surface 16, which has a ring shape and is designed to interoperate with thrust surface 10 on the holder 4. Width (A) thrust surface 15 on the additional protrusion 14 of the thrust element 8 is more than 0.15 and less than 1.0 on the width (B) of the support surface 16 on the main tab 13 of the thrust element 8, that is, the following relationship between the geometric parameters of the elements of the device: of 0.15</B<1.0 in. The aforementioned ratio between the geometric parameters obtained empirically from the optimal ratio between the minimum coefficient of friction between the interacting surfaces, and maximum resistance to wear of the interacting components of the unit. Width (A) thrust surface 15 on the additional protrusion 14 of the thrust element 8 is more than 0.15 and less than 1.0 on the width (In) bearing surface 9 of the working head 2 of the cutter 1, that is, the following relationship between the geometric parameters of elements stored the device: of 0.15< A/b<1.0 in. The aforementioned ratio between the geometric parameters obtained empirically from the optimal ratio between the minimum coefficient of friction between the interacting surfaces, and maximum resistance to wear of the interacting parts of the device.

The main ledge 13 of the thrust element 8 may be in the form of cylinder rotation (figure 1 and 2), which is located on the lower base 12. One of the variants of the constructive execution of the thrust element 8 bearing surface 16 on its primary protrusion 13 can be smoothly mated with the lower base 12 of the thrust element 8, that is the main ledge 13 of the thrust element 8 can take the form of, for example, a truncated cone of revolution (figure 3, 4 and 5).

Additional protrusion 14 of the thrust element 8 may be in the form of cylinder rotation (figure 1 and 2), which is located on the upper base 11. One of the variants of the constructive execution of the thrust element 8 resistant surface 15 on its additional protrusion 14 can be smoothly mated with the upper base 11 of the thrust element 8, i.e. additional protrusion 14 of the thrust element 8 can take the form of, for example, a truncated cone of revolution (figure 3, 4 and 5).

Bearing surface 16 on the main tab 13 may be of any shape. Preferably, the supporting surface 16 on the basis of the s ledge 13 had a flat shape (Fig 1, 2 and 3).

The thrust surface 15 on the additional protrusion 14 may be of any shape. Preferably, the thrust surface 15 on the additional protrusion 14 has a flat shape (figure 1, 2 and 3).

One of the options for structural embodiment of the device bearing surface 16 on the main tab 13 can have in cross section the shape of an arc. When this bearing surface 16 on the main tab 13 in this case, you may have a convex shape (figure 4) or a concave shape (figure 5).

One of the options for structural embodiment of the device resistant surface 15 on the additional protrusion 14 can have in cross section the shape of an arc. When this thrust surface 15 on the additional ledge 14 in this case, you may have a convex shape (figure 4) or a concave shape (figure 5).

Interacting with thrust surface 15 on the additional protrusion 14 of the bearing surface 9 on the working head 2 of the cutter 1 may be of any shape, for example, flat (figure 1 and 2) or resistant response surface 15 (not shown).

Interacting with the supporting surface 16 on the main tab 13 of the thrust surface 10 on the holder 4 can also be of any shape, for example, flat (figure 1 and 2) or a mating support surface 16 (not shown).

Most preferred is a variant of the construction you is filling up device, when the hardness of the material of the thrust element 8 would not be less than the hardness of respectively supporting surface 9 of the working head 2 of the cutter 1 and the thrust surface 10 of the tool holder 4.

Alternatively structural embodiment of the device, it is advisable to wear of the thrust element 8 would not lower wear resistance, respectively, of the support surface 9 of the working head 2 and the thrust surface 10 of the tool holder 4.

The thrust element 8 may be made in the form of washers (figure 3, 4 and 5).

When performing thrust element 8 in the form of a washer on one of the options structural embodiment of the device is preferable that the inner diameter (D) washer does not exceed the diameter (D) of the holes 5 in the holder 4, that is performed by the following condition: G<D.

As mentioned above, the locking element 7 may be of any known construction. Most preferably, the locking element 7 was made in the form of a split sleeve (figure 1 and 2) of elastic material, for example of spring steel.

Under this option, the structural embodiment of the locking element 7 is preferable that the inner diameter (D) washers would not be less than the outer diameter of the split sleeve in a free state.

A device for the destruction of the mineral and artificial materials works with edusim way.

When assembling the device in the groove of the shank 3 of the cutter 1 place the locking element 7. In the case of a structural embodiment of the device, in which the internal diameter (D) washers not less than the outer diameter of the split sleeve (not shown), washer put on the shank 3 of the cutter 1. However, by virtue of the above ratios of the geometric parameters of the components of the unit split bushing will not prevent the puck before it against the support surface 9 of the working head 2 of the cutter. Then using a special Assembly fixtures (drawings not shown) compresses the split sleeve and the end of the shank 3 is inserted into the opening 5 of the holder 4. This split sleeve in a compressed state is placed in the opening 5 of the holder 4 and move the working head 2 cutter 1 together with the split sleeve in the axial direction until it touches the corresponding surfaces of the working cylinder 1, the thrust element 8 and the tool holder 4. Then release the Assembly fixture, and a split sleeve under the action of forces of elasticity is fixed in the opening 5 of the holder 4, thereby preventing axial movement of the shank 3 of the cutter 1 relative to the tool holder 4. In another embodiment, a structural embodiment of the device, when the internal diameter (D) washer does not exceed the diameter (D) of the holes 5 in d is lederzeele 4, pre-placed in the groove of the shank 3 of the cutter 1 the locking element 7 is compressed using a special Assembly fixtures and put on the washer. Thus, the locking element 7 is fixed in a compressed state through the washer and remove the Assembly fixture. It should be noted that the outer diameter of the stopper element 7 is equal to the inner diameter (D) washer, i.e. the locking element 7 in the locked state can pass into the opening 5 of the holder 4. Then the end of the shank 3 is inserted into the opening 5 of the holder 4 and move the working head 2 of the cutter 1 in the axial direction. As you move the working head 2 washer will interact with thrust surface 10 of the tool holder 4 and to move on stoparea element 7 in the direction of the working cylinder 2 of the cutter 1. The stopper element 7 will move in the opening 5 of the holder 4. The specified movement will continue until such time as the washer will not release the locking element 7, which under the action of forces of elasticity is fixed in the opening 5 of the holder 4, thereby preventing axial movement of the shank 3 of the cutter 1 relative to the tool holder 4.

When operating the cutter head 2 1 destructible material occurs torque, which is caused by tre the Oia working head 2 of destructible material. Specified torque causes the cutter 1 to rotate around the longitudinal axis 6 relative to the fixed tool holder 4. Since the width (A) thrust surface 15 on the additional protrusion 14 of the thrust element 8 is less than the width (B) of the support surface 16 on the main tab 13 of the thrust element, the resistance force to the rotation of the thrust element 8 relative to the working head 2 will be less resistance to rotation of the thrust element 8 relative to the tool holder 4. This circumstance is explained by the ratio of the areas of the interacting surfaces, respectively, of the support surface 9 of the working head 2 and the thrust surface 15 of the thrust element 8, on the one hand, and the thrust surface 10 of the tool holder 4 and the supporting surface 16 of the thrust element 8, on the other hand. Thus, at the initial stage of the working cylinder 2 cutter 1 will rotate around the longitudinal axis 6 relative to the thrust element 8, which in turn is fixed with respect to the tool holder 4.

When injected particles destructible material between the thrust surface 15 additional protrusion 14 on the thrust element 8 and the bearing surface 9 of the working head 2 increases the adhesion between the working cylinder 2 and the thrust element 8, which leads to joint rotation of the working head 2 and the thrust element is 8 relative to the tool holder 4. It should be noted that the joint rotation of the working head and thrust element 8 will be carried out and if the process wear resistant surface 15 on the additional protrusion 14 of the thrust element 8 its width (A) exceeds the width (B) of the support surface 16 on the main tab 13 of the thrust element 8.

During the further operation of the device due to changes in the ratio of the area of the interacting surfaces due to wear, the situation may change, i.e. to return to the original position when the rotation of the working head 2 relative to the stationary thrust element 8.

Thus, during operation of the device in any case ensures stable rotation of the working head 2 relative to the tool holder 4, which allows to maintain a uniform wear of the cutter 1 and, therefore, significantly extending its service.

1. A device for the destruction of mineral and synthetic materials, comprising a rotary cutter with a working head, which is the base surface of the annular shape, and with the shank, the tool holder with a hole to accommodate the shank of the cutter and with the thrust surface of the ring-shaped locking element for locking the shank of the cutter in the hole of the tool holder and mounted between the work of Golfcourse and tool holder rotatably resistant element with the upper base and the lower base, which is a protrusion, wherein the thrust element is made with located on the upper basis of the additional ledge with the thrust surface of the ring shaped for engagement with the bearing surface of the working head, and located at the bottom base of the thrust element main ledge performed with the bearing surface of the ring form to interact with the thrust surface of the tool holder, the width of the thrust surface for extra protrusion of the thrust element is more than 0.15 and less than 1.0 on the width of the support surface on the main ledge of the thrust element, the width of the thrust surface for extra protrusion of the thrust element is more than 0.15 and less than 1.0 on the width of the support surface the working head.

2. The device according to claim 1, characterized in that the bearing surface on the main ledge thrust element smoothly mated with the lower base of the thrust element.

3. The device according to claim 1, characterized in that the thrust surface for extra protrusion of the thrust element smoothly mated with the upper base of the thrust element.

4. The device according to claim 1, characterized in that the bearing surface on the main ledge of the thrust element has a flat shape.

5. The device according to claim 1, characterized in that the thrust surface on the additional invoice is e thrust element has a flat shape.

6. The device according to claim 1, characterized in that the bearing surface on the main ledge of the thrust element has in cross section the shape of an arc.

7. The device according to claim 1, characterized in that the thrust surface for extra protrusion of the thrust element has in cross section the shape of an arc.

8. The device according to claim 1, characterized in that the hardness of the thrust element is not less than the hardness of respectively supporting surface of the working head and the thrust surface of the tool holder.

9. The device according to claim 1, wherein the wear resistant element is not lower than the wear resistance, respectively, of the support surface of the working head and the thrust surface of the tool holder.

10. The device according to claim 1, wherein the thrust element is designed in the form of a washer.

11. The device according to claim 10, characterized in that the inner diameter of the washer does not exceed the diameter of the hole in the tool holder.

12. The device according to claim 1, characterized in that the locking element is designed in the form of a split sleeve of resilient material.

13. The device according to item 12, wherein the inner diameter of the washer is not less than the outer diameter of the split sleeve in a free state.



 

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