Polycrystalline diamond wire cutting clamp

Abstract

The utility model relates to the field of diamond clamping or clamps during diamond machining, in particular to a polycrystalline diamond wire cutting clamp which comprises a base, and a pressing piece used for pressing a piece-shaped polycrystalline diamond to be machined is fixed on the base through a threaded connecting piece. The base is further provided with a positioning structure used for positioning the pressing piece and preventing the pressing piece from rotating. According to the utility model, the positioning structure is additionally arranged on the existing clamp, and the positioning structure is matched with the pressing piece in a stopping manner, so that the pressing piece cannot rotate. The pressing piece cannot rotate, so that the pressing piece cannot rotate along with the movement of the sheet-shaped polycrystalline diamond, static friction is kept between the to-be-machined polycrystalline diamond sheet and the pressing piece, the sheet-shaped polycrystalline diamond is more difficult to move, and the clamping effect of the clamp is better; the problem that in the prior art, when polycrystalline diamond is machined, a clamp cannot clamp a clamped workpiece is solved.

Description

Technical Field

[0001] The utility model relates to the field of diamond clamping or pliers during diamond processing, and particularly relates to a polycrystalline diamond wire cutting fixture. Background Art

[0002] In the prior art, in order to obtain polycrystalline diamond blades, it is necessary to cut sheet-shaped polycrystalline diamond to obtain batches of small grains of the required shape for subsequent processing. During cutting, a fixture is generally used to clamp the sheet-shaped polycrystalline diamond. After clamping, a wire cutting tool is used to cut the sheet-shaped polycrystalline diamond to obtain appropriate small grains. In the prior art, the fixture includes a base. A positioning groove is formed at the edge position of the base. A gasket is arranged at the bottom of the positioning groove. The sheet-shaped polycrystalline diamond is placed on the gasket close to the groove wall of the positioning groove. A U-shaped clamping rod is also fixed on the base. One U-shaped end of the clamping rod presses on the surface of the sheet-shaped polycrystalline diamond, and the other end presses on the base. A through hole is formed on the clamping rod. A stud fixed on the base passes through the through hole of the clamping rod and is matched with a fastening nut of the clamping rod to fix the clamping rod. A rubber gasket ring is also sleeved on the stud. When the fastening nut of the clamping rod is tightened, the clamping rod presses the rubber gasket ring tightly.

[0003] However, during wire cutting, the sheet-shaped polycrystalline diamond is processed on both the left and right sides of the sheet-shaped polycrystalline diamond. The wire cutting device will apply a force to the sheet-shaped polycrystalline diamond to move it to the other side. The sheet-shaped polycrystalline diamond will translate relative to the base of the fixture. When the sheet-shaped polycrystalline diamond translates, the clamping rod will rotate around the stud, resulting in the inability to ensure the consistency of the shapes of the cut small grains. In order to ensure the clamping stability, the position of the clamping rod needs to be adjusted continuously during the processing. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a polycrystalline diamond wire cutting fixture to solve the problem that the fixture in the prior art cannot clamp the workpiece to be clamped during polycrystalline diamond processing.

[0005] A polycrystalline diamond wire cutting fixture includes a base. A pressing member for pressing the sheet-shaped polycrystalline diamond to be processed is fixed on the base through a threaded connector. A positioning structure for positioning the pressing member and preventing the pressing member from rotating is also arranged on the base.

[0006] Further, the end of the pressing member forms a positioning surface. The positioning structure is arranged on the side of the pressing member away from the sheet-shaped polycrystalline diamond to be processed. The positioning structure includes a stop surface that is in stop cooperation with the positioning surface to prevent the pressing member from rotating.

[0007] Further, the positioning surface and the stop surface are positioned and the pressing member is prevented from rotating by plane fitting.

[0008] Furthermore, both ends of the pressing member form positioning surfaces, and the widths of both ends of the pressing member are unequal.

[0009] Furthermore, the pressing member is an isosceles trapezoid, and both end faces of the pressing member form the bases of the isosceles trapezoid.

[0010] Furthermore, a positioning block is detachably installed on the base, the positioning block forms a positioning structure, and the end face of the positioning block close to the pressing member forms a stopping surface.

[0011] Furthermore, the positioning block is adjustably installed on the base along the direction away from the sheet-shaped polycrystalline diamond to be processed, the positioning block forms a positioning structure, and the end face of the positioning block close to the pressing member forms a stopping surface.

[0012] Furthermore, a long groove extending along the direction away from the pressing member is formed on the positioning block, a positioning fixing stud is arranged on the base, a positioning fixing nut is screwed on the positioning fixing stud, and the positioning block is adjustably installed on the base through the cooperation of the positioning fixing stud, the long groove and the positioning fixing nut.

[0013] The present utility model improves the prior art. Specifically: The present utility model adds a positioning structure to the existing fixture. The positioning structure is in blocking cooperation with the pressing member, so that the pressing member cannot rotate. Since the pressing member cannot rotate, the pressing member cannot rotate along with the movement of the sheet-shaped polycrystalline diamond, so that a static friction is maintained between the polycrystalline diamond sheet to be processed and the pressing member, making it more difficult for the sheet-shaped polycrystalline diamond to move, and improving the clamping effect of the fixture, solving the problem that the fixture cannot clamp the workpiece to be clamped during the processing of polycrystalline diamond in the prior art. Description of the Drawings

[0014] Figure 1 is: A schematic structural diagram of the polycrystalline diamond wire cutting fixture in the first embodiment of the polycrystalline diamond wire cutting fixture of the present utility model during use;

[0015] Figure 2 is: A cross-sectional view of the polycrystalline diamond wire cutting fixture in the first embodiment of the polycrystalline diamond wire cutting fixture of the present utility model during use.

[0016] In the figure: 1. Pressing member; 2. Sheet-shaped polycrystalline diamond; 3. Gasket; 4. Base; 5. Pressing fixing nut; 6. Pad ring; 7. Positioning fixing nut; 8. Long groove; 9. Positioning block; 10. Positioning groove; 11. Pressing fixing stud; 12. Positioning fixing stud. Detailed Embodiment

[0017] The specific concept of the polycrystalline diamond wire cutting fixture of the present utility model:

[0018] A polycrystalline diamond wire cutting fixture, comprising a base, a positioning groove for placing a sheet-shaped polycrystalline diamond to be processed is provided on the base, a pressing member for pressing the sheet-shaped polycrystalline diamond to be processed is fixed on the base through a threaded connecting member, and a positioning structure for positioning the pressing member and preventing the pressing member from rotating is further provided on the base.

[0019] During use, the sheet-shaped polycrystalline diamond to be processed is placed in the positioning groove, and then the pressing member is moved downward through the threaded connecting member to press the sheet-shaped polycrystalline diamond to be processed. And the rotation of the pressing member is prevented by the cooperation of the positioning structure and the pressing member. Then the wire cutting device is started to cut the sheet-shaped polycrystalline diamond to be processed.

[0020] The present utility model improves the prior art. Specifically: by providing a positioning structure, the positioning structure cooperates with the pressing member to fix the pressing member, so that the pressing member cannot rotate. The inability of the pressing member to rotate also makes it impossible for the pressing member to rotate under the action of friction following the movement of the polycrystalline diamond sheet to be processed, so that a static friction is maintained between the polycrystalline diamond sheet to be processed and the pressing member, and it is more difficult for the polycrystalline diamond sheet to be processed to move, greatly optimizing the clamping effect and solving the problem that the fixture cannot clamp the workpiece to be clamped during the processing of polycrystalline diamond in the prior art.

[0021] The features and performance of the present utility model will be further described in detail below in conjunction with embodiments.

[0022] Embodiment 1 of the polycrystalline diamond wire cutting fixture of the present utility model:

[0023] As Figure 1-2 shown: A polycrystalline diamond wire cutting fixture, comprising a base 4, a positioning groove 10 for placing a sheet-shaped polycrystalline diamond 2 to be processed is provided on the base 4, a gasket 3 is provided at the bottom of the positioning groove 10, and a pressing member 1 for pressing the sheet-shaped polycrystalline diamond 2 in the positioning groove 10 is installed on the base 4 through the cooperation of a pressing and fixing stud 11 and a pressing and fixing nut 5. Of course, in other embodiments, a threaded hole may also be provided on the base 4, and the pressing member 1 may be fixed through the cooperation of the threaded hole and a pressing and fixing bolt. The pressing member 1 is U-shaped, one end of the U-shaped pressing member 1 presses the sheet-shaped polycrystalline diamond 2, and the other end presses on the base 4. A through hole for the pressing and fixing stud 11 to pass through is provided in the middle of the U-shaped pressing member 1, and a gasket ring 6 made of rubber is also sleeved on the pressing and fixing stud 11. When the pressing and fixing nut 5 is tightened, the gasket ring 6 is compressed and deformed. A positioning structure for positioning the pressing member 1 and preventing the pressing member 1 from rotating is further provided on the base 4.

[0024] The positioning of the pressing member 1 can be achieved by providing a perforation in the pressing member 1, and an insertion hole is provided in the base 4 corresponding to the position of the perforation. The fixing pin passes through the perforation and extends into the insertion hole to fix the pressing member 1, and the fixing pin constitutes the positioning structure. However, in this way, in order to make the process of inserting and removing the fixing pin easier, there must be a margin in the insertion hole and the perforation after the fixing pin is inserted, which causes the pressing member 1 to still shake to a certain extent. Therefore, preferably: the end of the pressing member 1 constitutes a positioning surface, and the positioning structure is arranged on the side of the pressing member 1 away from the polycrystalline diamond sheet 2 to be processed. The positioning structure includes a stop surface that is in stop cooperation with the positioning surface to prevent the pressing member 1 from rotating. The end of the pressing member 1 constitutes a positioning surface, and the positioning structure is a positioning convex block integrally formed on the base 1. The end face of the positioning convex block close to the pressing member 1 is the stop surface. The end face of the pressing member 1 close to the positioning convex block is the positioning surface. The stop surface and the positioning surface are pressed tightly together to achieve the positioning of the pressing member 1. The positioning of the pressing member 1 is achieved through the cooperation of surfaces, and relatively speaking, the positioning effect is better, and the pressing member 1 is less likely to rotate. For further optimization, the positioning surface and the stop surface are positioned and the pressing member 1 is prevented from rotating by means of planar fitting. That is, the end face of the pressing member 1 serving as the positioning surface is a plane, and the end face of the positioning convex block serving as the stop surface is a plane. The stop cooperation between the pressing member 1 and the positioning structure is achieved through the planar cooperation method. Relatively speaking, the cooperation effect between planes is better and more stable.

[0025] When only processing polycrystalline diamond sheets 2 of one model, the above-mentioned implementation method can meet the usage requirements. However, during processing, the sizes of the polycrystalline diamond sheets 2 to be processed may not be the same, some are large and some are small. If the width of the end of the pressing member 1 is greater than that of the polycrystalline diamond sheet 2 to be processed, the parts of the polycrystalline diamond sheet 2 to be processed on both sides of the pressing member 1 cannot be cut. Therefore, as a preferred implementation method: both end faces of the pressing member 1 constitute positioning surfaces, and the widths of both ends of the pressing member 1 are not equal. The widths of both ends of the pressing member 1 are not equal, so that the pressing member 1 can determine whether to use the wider end or the narrower end to press the polycrystalline diamond sheet 2 to be processed according to the shape of the polycrystalline diamond sheet 2 to be processed. The narrower end is adapted to the relatively smaller polycrystalline diamond sheet 2 to be processed, and the wider end is adapted to the larger polycrystalline diamond sheet 2 to be processed. And in order to ensure that any one of the two ends of the pressing member 1 can cooperate with the positioning structure when serving as the pressing end, both end faces of the pressing member 1 constitute positioning surfaces. For further optimization: the pressing member 1 is an isosceles trapezoid, and the two end faces of the pressing member constitute the bottom of the isosceles trapezoid. Making the pressing member 1 into an isosceles trapezoid can, relatively speaking, more accurately clamp the middle position of the polycrystalline diamond 2 to be processed.

[0026] Since the pressing member 1 with unequal widths at both ends needs to select a relatively appropriate end to press the sheet polycrystalline diamond 2 to be processed according to the size of the sheet polycrystalline diamond 2 to be processed. However, if the positioning structure is fixed to the base 4, it is necessary to remove the pressing member 1, which is relatively inconvenient. Therefore, as a preferred embodiment: a positioning block 9 is adjustably installed on the base 4 in a direction away from the sheet polycrystalline diamond to be processed, the positioning block 9 constitutes a positioning structure, and the end face of the positioning block 9 close to the pressing member 1 constitutes a stop surface. Of course, in other embodiments, other methods can also be used: the positioning block 9 is detachably installed on the base 4, the positioning block 9 constitutes a positioning structure, and the end face of the positioning block 9 close to the pressing member 1 constitutes a stop surface. A bolt through hole is provided on the positioning block 9, and a corresponding threaded hole is provided on the base 4, and the positioning block 9 is fixed by the cooperation of the bolt and the thread. When it is necessary to adjust the pressing end of the pressing member 1, the positioning block 9 is removed from the base 4, and then the pressing member 1 is directly rotated. The positioning block 9 is adjustably or detachably installed on the base 4, so that when the pressing member 1 needs to be rotated, the positioning block 9 can relatively quickly make enough space for the pressing block 1 to rotate, which is relatively time-saving and labor-saving in operation.

[0027] In order to adjust the position of the positioning block 9 more quickly, preferably: a long slot 8 extending in a direction away from the pressing member 1 is provided on the positioning block 9, a positioning and fixing stud 12 is provided on the base 4, a positioning and fixing nut 7 is screwed on the positioning and fixing stud 12, and the positioning block 9 is adjustably installed on the base 4 through the cooperation of the positioning and fixing stud 12, the long slot 8 and the positioning and fixing nut 12. When it is necessary to rotate the pressing member 1, loosen the positioning and fixing nut 7, move the positioning block 9 away from the pressing member 1 through the long slot 8, and then rotate the pressing member 1. After the pressing member 1 rotates in place, move the positioning block 9 towards the pressing member 1 until the stop surface of the positioning block 9 abuts against the positioning surface of the pressing member 1, and then tighten the positioning and fixing nut 7 to fix the positioning block 9. By adopting the method of providing a long slot on the positioning block 9, compared with other methods, when adjusting the position of the positioning block 9, only the positioning and fixing nut 7 needs to be loosened to move the positioning block 9, and only the positioning and fixing nut 7 needs to be tightened when fixing again, and the adjustment process is more time-saving and labor-saving.

[0028] In use, first fix the base 4 on the machine tool through the fixing device, loosen the positioning fixing nut 7, then move the positioning block 9 to the side away from the pressing member 1, and then loosen the pressing fixing nut 5 and rotate the pressing member 1. When the appropriate end of the pressing member 1 rotates to face the positioning groove 10, place the sheet polycrystalline diamond 2 to be processed on the gasket 3 in the positioning groove 10, and make the edge of the sheet polycrystalline diamond 2 to be processed fit against the groove wall of the positioning groove 10. Then tighten the pressing fixing nut 5 to clamp the sheet polycrystalline diamond 2 to be processed, then push the positioning block 9 against the pressing member 1, and tighten the positioning fixing nut 7. Start the wire cutting device to cut the sheet polycrystalline diamond 2 to be processed.

[0029] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. All equivalent structural changes made by using the description and drawings of the present invention should, by the same token, be included in the protection scope of the present invention.

Claims

1. A polycrystalline diamond wire cutting fixture, comprising a base, on which a clamping member for clamping a sheet of polycrystalline diamond to be processed is fixed through a threaded connector, characterized in that: The base is also provided with a positioning block for positioning the clamping piece and preventing the clamping piece from rotating. The end of the clamping piece constitutes a positioning surface. The positioning block is arranged on a side of the clamping piece away from the sheet-like polycrystalline diamond to be processed. The positioning block includes a stop surface that is plane-fitted with the positioning surface to prevent the clamping piece from rotating.

2. The polycrystalline diamond wire cutting fixture according to claim 1, characterized in that: Both end surfaces of the pressing member constitute the positioning surface, and the widths of the two ends of the pressing member are different.

3. The polycrystalline diamond wire cutting fixture according to claim 2, characterized in that: The pressing piece is an isosceles trapezoid, and the two end surfaces of the pressing piece form the base of the isosceles trapezoid.

4. The polycrystalline diamond wire cutting fixture according to claim 3, characterized in that: The positioning block is detachably mounted on the base, and the end surface of the positioning block close to the pressing piece constitutes the stopping surface.

5. The polycrystalline diamond wire cutting fixture according to claim 3, characterized in that: A positioning block is adjustably mounted on the base in a direction facing away from the sheet-shaped polycrystalline diamond to be processed. The positioning block constitutes the positioning structure, and the end surface of the positioning block close to the pressing member constitutes the stop surface.

6. The polycrystalline diamond wire cutting fixture according to claim 5, characterized in that: The positioning block is provided with a long groove extending in the direction away from the sheet-shaped polycrystalline diamond to be processed, and the base is provided with a positioning fixing stud, on which a positioning fixing nut is screwed. The positioning block is adjustably mounted on the base through the cooperation of the positioning fixing stud, the long groove and the positioning fixing nut.

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