Polishing and positioning clamp and polishing device for PCBN (Polycrystalline Cubic Boron Nitride) indexable cutter

Abstract

The invention provides a PCBN (Polycrystalline Cubic Boron Nitride) indexable cutter grinding and positioning clamp and a grinding device, and relates to the technical field of cutter grinding. The bearing component comprises a bearing face, the limiting piece is arranged on the bearing face and comprises a limiting groove, and the limiting groove is concaved towards the interior of the limiting piece from one side, in the first direction, of the limiting piece. The PCBN indexable cutter is arranged on the bearing surface, and part of the PCBN indexable cutter extends into the limiting groove so as to position the PCBN indexable cutter; and the fastening component is hinged to the bearing component, and the fastening component can apply force to the first end of the crimping component, so that the second end of the crimping component abuts against the side, back to the bearing face, of the PCBN indexable cutter in the second direction, and the PCBN indexable cutter is pressed. Through cooperation of the limiting piece, the bearing component, the crimping component and the fastening component, stable clamping of the PCBN indexable tool is achieved, the grinding precision of the PCBN indexable tool is improved, and therefore the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of tool grinding, and in particular to a positioning fixture and grinding device for grinding PCBN indexable tools. Background Art

[0002] The production of polycrystalline cubic boron nitride (PCBN) and its products is an important branch of the superhard material industry. Since the PCBN indexable tool was first introduced as a cutting tool material, it has gradually become the preferred tool for commonly solving difficult-to-machine materials, and it can be used to machine difficult-to-machine materials such as hardened steel, cast iron, superalloy, and powder metallurgy materials after quenching. Nowadays, PCBN indexable tools are gradually replacing traditional carbide tools and ceramic tools with many excellent characteristics such as high wear resistance, high corrosion resistance, high removal rate, and high cost performance, and are widely used in the field of ferrous metal processing in industries such as automotive, aviation, and shipbuilding.

[0003] In enterprises engaged in machining of hardened parts, grinding is a main method for final shaping of parts. With the improvement of machine tool rigidity and the development of PCBN indexable tools, PCBN indexable tools have shown great superiority in the hardened cutting of ferrous metals such as cast iron and hardened steel, and are deeply favored by machining enterprises such as automotive, die, and mining machinery. However, as is well known, PCBN materials are artificially synthesized under extremely harsh high temperature and high pressure conditions, and the prices of PCBN indexable tools are not cheap. Therefore, many enterprises choose to send worn-out tools to professional tool manufacturing enterprises for secondary grinding after the PCBN indexable tools are worn. Although the grinding cost is lower than the cost of purchasing new tools, it is still much more expensive than the price of traditional tools. There are also some machining enterprises with their own tool grinding personnel, but due to the limited experience level of workers and the accuracy and convenience of tooling fixtures, the quality of the ground tools is uneven.

[0004] Tool grinding started in the 1970s. For traditional welded integral alloy tool grinding, the operator holds the tool handle close to the grinding wheel for grinding, which is very dangerous and the grinding quality cannot be guaranteed. Later, some safer grinding fixtures were designed to replace hand-held grinding, but the above-mentioned fixtures can only be applied to the grinding of traditional welded integral alloy tools, and they cannot be applied to the grinding of PCBN indexable tools with different shapes and sizes. The use and adjustment are not convenient, and the actual grinding efficiency is relatively low.

[0005] Meanwhile, the actual difficulty of tool grinding is no less than that of manufacturing a new tool. The dimensional accuracy of the tool before wear is within the tolerance range. When grinding, it is necessary to ensure the original tool IC value, and the tip cannot be skewed left or right. At the same time, it is necessary to ensure that the M value of the ground edge meets the design requirements, and chamfering treatment of the edge should be carried out during the grinding process. The tip allowance before grinding is very small, and the size and position of the tip wear failure are also random. This requires rich tool manufacturing experience and good fixture accuracy guarantee. Grinding the PCBN indexable tool by holding it manually cannot meet the grinding requirements of the PCBN indexable tool. Summary of the Invention

[0006] In view of this, the present application provides a grinding positioning fixture and a grinding device for a PCBN indexable tool to solve the problem that the grinding requirements of the PCBN indexable tool cannot be met by grinding the PCBN indexable tool by holding it manually.

[0007] According to one aspect of the present application, there is provided a grinding positioning fixture for a PCBN indexable tool. The grinding positioning fixture for a PCBN indexable tool is used for grinding a PCBN indexable tool. The grinding positioning fixture for a PCBN indexable tool includes a limiting member, a supporting member, a pressing member and a fastening member. The supporting member includes a supporting surface. The limiting member is arranged on the supporting surface. The limiting member includes a limiting groove which is recessed from one side of the limiting member in a first direction into the interior of the limiting member.

[0008] The PCBN indexable tool is arranged on the supporting surface, and a part of the PCBN indexable tool extends into the limiting groove.

[0009] The fastening member is hinged to the supporting member. The fastening member can apply a force to the first end of the pressing member, so that the second end of the pressing member abuts against the side of the PCBN indexable tool facing away from the supporting surface in a second direction. The first direction intersects with the second direction.

[0010] Preferably, the pressing member includes a pressing main body and an abutting member. The abutting member protrudes from the pressing main body towards the supporting member. The abutting member can abut against the PCBN indexable tool.

[0011] Preferably, the pressing member includes a connecting member which protrudes from the pressing main body along the second direction.

[0012] The PCBN indexable tool grinding positioning fixture includes a rotating shaft and two supporting members. The two supporting members are arranged on the supporting member at intervals in the third direction. The connecting member is arranged between the two supporting members and is connected to the two supporting members through the rotating shaft. The third direction intersects the plane determined by the first direction and the second direction.

[0013] Preferably, the crimping body has a threaded hole penetrating the crimping member. The threaded hole and the abutting member are respectively located on both sides of the connecting member in the first direction.

[0014] The fastening member extends along the second direction. The fastening member is threadedly connected to the threaded hole and abuts against the supporting member.

[0015] Preferably, the PCBN indexable tool grinding positioning fixture further includes an adapter. One end of the supporting member in the first direction is connected to the adapter. The groove wall of the limiting groove includes two positioning planes. The extending directions of the two positioning planes intersect. In the direction from the supporting member to the adapter, the distance between the two positioning planes gradually decreases in the third direction.

[0016] Preferably, the dimension of the limiting member in the second direction is smaller than the dimension of the PCBN indexable tool in the second direction.

[0017] Preferably, the PCBN indexable tool grinding positioning fixture further includes a mounting seat and a tensioning member. The mounting seat includes a limiting hole and an engaging groove. The limiting hole penetrates the mounting seat along the first direction. The engaging groove is recessed from one side of the mounting seat in the third direction into the mounting seat. The engaging groove communicates with the limiting hole.

[0018] The adapter is arranged in the limiting hole. The tensioning member can apply a force to the mounting seat to make two parts of the mounting seat on both sides of the engaging groove approach each other in the second direction.

[0019] Preferably, a plurality of scale lines are arranged on one side of the mounting seat facing away from the supporting member. The plurality of scale lines are equidistantly spaced along the circumferential direction of the limiting hole.

[0020] A marking portion is arranged on one side of the adapter facing away from the supporting member. The adapter can rotate in the limiting hole to make the marking portion point to one of the scale lines.

[0021] Preferably, the supporting member encloses a first communication cavity. A first hole is opened on one side of the supporting member facing away from the adapter in the first direction. The first hole communicates with the first communication cavity.

[0022] The connecting piece defines a second communication cavity. The connecting piece is provided with a second hole on a side facing away from the supporting member in the first direction. The second hole communicates with the second communication cavity, and the first communication cavity communicates with the second communication cavity.

[0023] According to another aspect of the present application, there is provided a grinding device, which includes a grinding machine and the above-mentioned PCBN indexable tool grinding positioning fixture, and the PCBN indexable tool grinding positioning fixture is fixed on the grinding machine.

[0024] When the PCBN indexable tool grinding positioning fixture of the present application is in use, the PCBN indexable tool is arranged on the supporting surface, and a part of the PCBN indexable tool extends into the limiting groove to achieve the positioning of the PCBN indexable tool. The fastening member can apply a force to the first end of the pressing member, so that the second end of the pressing member abuts against the side of the PCBN indexable tool facing away from the supporting surface in the second direction, thereby pressing the PCBN indexable tool tightly. In this way, through the cooperation of the limiting member, the supporting member, the pressing member and the fastening member, the stable clamping of the PCBN indexable tool is realized, the grinding accuracy of the PCBN indexable tool is improved, and thus the production efficiency is improved. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0026] Figure 1 Showing the relative position diagram of the PCBN indexable tool grinding positioning fixture and the grinding wheel;

[0027] Figure 2 Showing the relative position diagram of the connecting piece and the positioning piece;

[0028] Figure 3 Showing the relative position diagram of the supporting member, the limiting member and the PCBN indexable tool;

[0029] Figure 4 Showing the relative position diagram of the supporting member and the limiting member;

[0030] Figure 5 Showing the relative position diagram of the fastening member and the pressing member;

[0031] Figure 6 Showing the structural schematic diagram of the mounting seat;

[0032] Figure 7Shows a structural schematic diagram of a grinding positioning fixture for a PCBN indexable cutting tool.

[0033] Icon: 1 - Limiting member; 11 - Limiting groove; 12 - Avoidance groove; 2 - Supporting member; 21 - First supporting plate; 211 - Positioning groove; 22 - Second supporting plate; 23 - Third supporting plate; 24 - First hole; 3 - Pressing member; 31 - Pressing main body; 32 - Abutting member; 33 - Connecting member; 4 - Fastening member; 41 - Fastener; 42 - Extension member; 5 - PCBN indexable cutting tool; 61 - Rotating shaft; 62 - Supporting member; 63 - Connecting rod; 64 - Tightening member; 65 - Bolt; 7 - Connecting member; 71 - Second hole; 72 - Marking portion; 8 - Mounting seat; 81 - Limiting hole; 82 - Connecting groove; 83 - Notch; 84 - Scale line; 9 - Grinding wheel; S1 - Supporting surface; S2 - Positioning plane; L1 - First direction; L2 - Second direction; L3 - Third direction. Detailed implementation manners

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. The components of the embodiments of the present application described and labeled in the accompanying drawings can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0036] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0038] In addition, terms such as "horizontal", "vertical", "hanging", etc. do not require the components to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0039] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0040] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0041] The following will be combined with Figures 1 to 7 to describe the PCBN indexable tool grinding positioning fixture of the present application, wherein the first direction L1 intersects with the second direction L2, and the third direction L3 intersects with the plane determined by the first direction L1 and the second direction L2. Preferably, the first direction L1, the second direction L2, and the third direction L3 are perpendicular to each other in pairs.

[0042] According to one aspect of the present application, there is provided a PCBN indexable tool grinding positioning fixture, which is used for grinding a PCBN indexable tool 5. As Figures 1 to 7 shown, the PCBN indexable tool grinding positioning fixture includes a limiting member 1, a supporting member 2, a pressing member 3, and a fastening member 4. The supporting member 2 includes a supporting surface S1. The limiting member 1 is arranged on the supporting surface S1. The limiting member 1 includes a limiting groove 11, and the limiting groove 11 recesses from one side of the limiting member 1 in the first direction L1 into the inside of the limiting member 1; the PCBN indexable tool 5 is arranged on the supporting surface S1, and a part of the PCBN indexable tool 5 extends into the limiting groove 11; the fastening member 4 is hinged to the supporting member 2, and the fastening member 4 can apply a force to the first end of the pressing member 3, so that the second end of the pressing member 3 abuts against the side of the PCBN indexable tool 5 facing away from the supporting surface S1 in the second direction L2.

[0043] When the PCBN indexable tool grinding positioning fixture of the present application is in use, the PCBN indexable tool 5 is arranged on the supporting surface S1, and a part of the PCBN indexable tool 5 extends into the limiting groove 11 to realize the positioning of the PCBN indexable tool 5. The fastening member 4 can apply a force to the first end of the pressing member 3, so that the second end of the pressing member 3 abuts against the side of the PCBN indexable tool 5 facing away from the supporting surface S1 in the second direction L2, thereby pressing the PCBN indexable tool 5 tightly. In this way, through the cooperation of the limiting member 1, the supporting member 2, the pressing member 3 and the fastening member 4, the stable clamping of the PCBN indexable tool 5 is realized, the grinding accuracy of the PCBN indexable tool 5 is improved, and thus the production efficiency is enhanced.

[0044] In the embodiment of the present application, as Figure 2 , Figure 3 and Figure 5 shown, the PCBN indexable tool 5 further includes an adapter 7, and the adapter 7 is connected to the end of the supporting member 2 facing away from the second supporting member 2 in the first direction L1. The pressing member 3 includes a pressing body 31 and an abutting member 32. The pressing body 31 is in a flat plate shape, and the abutting member 32 protrudes from the pressing body 31 towards the supporting member 2. The abutting member 32 can abut against the PCBN indexable tool 5. Through the cooperation of the abutting member 32 and the supporting surface S1, the pressing of the PCBN indexable tool 5 in the second direction L2 can be realized.

[0045] Furthermore, the pressing member 3 includes a connecting member 33, and the connecting member 33 protrudes from the pressing body 31 along the second direction L2; the PCBN indexable tool grinding positioning fixture includes a rotating shaft 61 and two supporting members 62. The two supporting members 62 are arranged at intervals along the third direction L3. The connecting member 33 is arranged between the two supporting members 62 and is connected to the two supporting members 62 through the rotating shaft 61, so that the pressing member 3 can rotate relative to the supporting member 62.

[0046] As Figure 5 shown, the pressing body 31 has a threaded hole penetrating through the pressing member 3, and the threaded hole and the abutting member 32 are respectively located on both sides of the connecting member 33 in the first direction L1; the fastening member 4 extends along the second direction L2, and the fastening member 4 is threadedly connected to the threaded hole, and the fastening member 4 abuts against the supporting member 2. In this way, when the fastening member 4 is tightened, the fastening member 4 rotates relative to the supporting member 2. Since the fastening member 4 abuts against the first supporting plate 21 of the supporting member 2, the first end of the pressing body 31 will move away from the supporting member 2 relative to the fastening member 4, and the second end of the pressing body 31 moves towards the PCBN indexable tool 5, so that the abutting member 32 abuts against the PCBN indexable tool 5, and the abutting member 32 cooperates with the supporting surface S1 to realize the positioning of the PCBN indexable tool 5 in the first direction L1.

[0047] Further, as Figure 4 shown, the groove wall of the limiting groove 11 includes two positioning planes S2. The two positioning planes S2 can both be perpendicular to the supporting plane S1, and the extending directions of the two positioning planes S2 intersect. In the direction of the supporting member 2 pointing to the connecting member 7, the distance between the two positioning planes S2 gradually decreases in the first direction L1. When the PCBN indexable cutting tool 5 is placed in the limiting groove 11, the bottom of the PCBN indexable cutting tool 5 contacts the supporting plane S1, and the two side surfaces of the PCBN indexable cutting tool 5 respectively abut against the two positioning planes S2. Through the cooperation of the two positioning planes S2, the limiting of the PCBN indexable cutting tool 5 can be realized. Optionally, the angles formed by the two positioning planes S2 in different limiting members 1 are different to adapt to PCBN indexable cutting tools 5 with different shapes and sizes.

[0048] Preferably, the size of the limiting member 1 in the second direction L2 is smaller than the size of the PCBN indexable cutting tool 5 in the second direction L2 to ensure that the pressing member 3 can abut against the PCBN indexable cutting tool 5.

[0049] In addition, the limiting member 1 further includes an avoidance groove 12, and the avoidance groove 12 is located between the two positioning planes S2. The tip of the PCBN indexable cutting tool 5 can extend into the avoidance groove 12 to ensure that the two side surfaces of the PCBN indexable cutting tool 5 respectively abut against the two positioning planes S2, so as to realize the limiting of the PCBN indexable cutting tool 5 in the first direction L1.

[0050] Optionally, the shape of the limiting member 1 provided in the present application is not only adapted to the form of the PCBN indexable cutting tool 5 in Figure 4 , but also applicable to the PCBN indexable cutting tool 5 with an arc-shaped surface. For example, the PCBN indexable cutting tool 5 can have an arc-shaped surface, and different positions of the arc-shaped surface respectively abut against the two positioning planes S2. At this time, the positioning of the PCBN indexable cutting tool 5 with an arc-shaped surface in the first direction L1 can be realized.

[0051] Preferably, the fastening member 4 includes a fastener 41 and an extension 42. The fastener 41 abuts against the side of the pressing body 31 facing away from the positioning member, and an external thread is formed on the outer side wall of the extension 42. The outer diameter of the fastener 41 is larger than the outer diameter of the extension 42, and a pattern is formed on the outer side wall of the fastener 41, which enables the operator to tighten the fastening member 4 by hand-tightening the fastener 41, thereby realizing the positioning of the PCBN indexable cutting tool 5.

[0052] In the embodiment of the present application, as Figure 2 , Figure 3 and Figure 4As shown, the connecting piece 7 is cylindrical, and the connecting piece 7 and the supporting member 2 can be integrally formed. The supporting member 2 includes a first supporting plate 21. A positioning groove 211 recessed toward the positioning member is formed on the first supporting plate 21. The bottom surface of the positioning groove 211 is the supporting surface S1, and the supporting surface S1 is perpendicular to the second direction L2. The limiting member 1 can be fixed on the supporting surface S1 through a bolt 65, so as to facilitate replacing different limiting members 1 according to PCBN indexable tools 5 with different shapes and sizes.

[0053] Further, as Figure 4 shown, the supporting member 2 further includes a second supporting plate 22 and a third supporting plate 23. The second supporting plate 22 and the third supporting plate 23 are located on the side of the supporting member 2 facing away from the connecting piece 7 in the first direction L1. The second supporting plate 22 and the third supporting plate 23 are connected. One end of the second supporting plate 22 facing away from the first supporting plate 21 in the second direction L2 is inclined toward the side where the connecting piece 7 is located relative to one end of the second supporting plate 22 facing the first supporting plate 21 in the second direction L2. One end of the third supporting plate 23 facing away from the first supporting plate 21 in the second direction L2 is inclined toward the side where the connecting piece 7 is located relative to one end of the third supporting plate 23 facing the first supporting plate 21 in the second direction L2, so as to avoid interference between the second supporting plate 22 and the third supporting plate 23 and the grinding wheel 9 of the grinding machine.

[0054] As Figure 6 and Figure 7 shown, the mounting seat 8 includes a notch 83. A part of the grinding machine extends into the notch 83, and the PCBN grinding fixture is fixed on the grinding machine by a connecting rod 63 passing through the mounting seat 8 and the grinding machine. The mounting seat 8 includes a limiting hole 81 and a connecting groove 82. The limiting hole 81 penetrates the mounting seat 8 along the first direction L1. The connecting groove 82 is recessed into the mounting seat 8 from one side of the mounting seat 8 in the third direction L3. The connecting groove 82 communicates with the limiting hole 81. The connecting piece 7 is arranged in the limiting hole 81. The tensioning piece 64 can apply a force to the mounting seat 8, so that two parts of the mounting seat 8 on both sides of the connecting groove 82 approach each other in the second direction L2, thereby fixing the connecting piece 7 and the supporting member 2 through the mounting seat 8.

[0055] Preferably, the tensioning piece 64 can be a bolt.

[0056] Further, as Figure 3 and Figure 7As shown, a plurality of scale lines 84 are arranged on the side of the mounting seat 8 facing away from the supporting member 2, and the plurality of scale lines 84 are arranged at equal intervals along the circumference of the limiting hole 81; an identification portion 72 is arranged on the side of the connecting member 7 facing away from the supporting member 2, and the connecting member 7 can rotate in the limiting hole 81 so that the identification portion 72 points to a scale line 84. In this way, the inclination of the supporting member 2 can be adjusted based on the scale lines 84, thereby adjusting the grinding angle of the PCBN indexable tool 5, so as to meet various complex angle grinding requirements of the PCBN indexable tool 5.

[0057] Optionally, the supporting member 2 is provided with a first connecting cavity, and a first hole 24 is provided on the supporting member 2, and the first hole 24 is connected to the first connecting cavity; the connecting member 7 is provided with a second connecting cavity, and a second hole 71 is provided on the side of the connecting member 7 facing away from the supporting member 2 in the third direction L3, and the second hole 71 is connected to the second connecting cavity, and the first connecting cavity is connected to the second connecting cavity. In this way, coolant can be provided to the grinding wheel 9 through the second hole 71, the second connecting cavity, the first connecting cavity and the first hole 24. Adding coolant during grinding helps the precision forming of the cutting edge of the PCBN indexable tool 5. The coolant can take away most of the grinding heat and grinding powder, and clean the grinding wheel 9 at the same time. Preferably, the first hole 24 is provided on both the second supporting plate 22 and the third supporting plate 23.

[0058] When the PCBN indexable tool grinding and positioning fixture of the present application is used, the PCBN indexable tool 5 is placed on the supporting surface S1, and the PCBN indexable tool 5 is located in the limiting groove 11, and the PCBN indexable tool 5 is abutted against the positioning plane S2, so as to limit the PCBN indexable tool 5 in the first direction L1 and the third direction L3. Then, the fastening member 4 is screwed to make the second end of the crimping member 3 move toward the PCBN indexable tool 5, and the crimping member 3 can realize the positioning of the PCBN indexable tool 5 in the second direction L2.

[0059] According to another aspect of the present application, a grinding device is provided, which includes a grinding machine and the above-mentioned PCBN indexable tool grinding and positioning fixture, and the PCBN indexable tool grinding and positioning fixture is fixed on the grinding machine. The grinding device has the same technical effect as the above-mentioned PCBN indexable tool grinding and positioning fixture, which will not be repeated here.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PCBN indexable tool grinding and positioning fixture, the PCBN indexable tool grinding and positioning fixture is used to grind the PCBN indexable tool, characterized in that: The PCBN indexable tool grinding and positioning fixture comprises a limiter, a supporting member, a crimping member and a fastening member, wherein the supporting member comprises a supporting surface, the limiter is arranged on the supporting surface, the limiter comprises a limiter groove, and the limiter groove is recessed from one side of the limiter in the first direction toward the inside of the limiter; The PCBN indexable tool is arranged on the supporting surface, and a portion of the PCBN indexable tool extends into the limiting groove; The fastening member is hinged to the supporting member, and the fastening member can apply force to the first end of the crimping member so that the second end of the crimping member abuts against the side of the PCBN indexable tool facing away from the supporting surface in the second direction, and the first direction intersects with the second direction.

2. The PCBN indexable tool grinding and positioning fixture according to claim 1 is characterized in that: The crimping member includes a crimping body and an abutment member, wherein the abutment member protrudes from the crimping body toward the supporting member, and the abutment member can abut against the PCBN indexable tool.

3. The PCBN indexable tool grinding and positioning fixture according to claim 2 is characterized in that: The crimping member includes a connecting piece, and the connecting piece protrudes from the crimping body along the second direction; The PCBN indexable tool grinding and positioning fixture includes a rotating shaft and two support members, the two support members are arranged on the supporting member at intervals along a third direction, the connecting member is arranged between the two support members and connected to the two support members through the rotating shaft, and the third direction intersects with a plane determined by the first direction and the second direction.

4. The PCBN indexable tool grinding and positioning fixture according to claim 3 is characterized in that: The crimping body has a threaded hole penetrating the crimping member, and the threaded hole and the abutment member are respectively located on both sides of the connecting member in the first direction; The fastening member extends along the second direction, is threadedly connected to the threaded hole, and abuts against the supporting member.

5. The PCBN indexable tool grinding and positioning fixture according to claim 3, characterized in that: The PCBN indexable tool grinding and positioning fixture further includes a connecting piece, and the supporting member is connected to one end of the connecting piece in the first direction. The groove wall of the limiting groove includes two positioning planes, and the extension directions of the two positioning planes intersect each other. In the direction from the supporting member to the connecting member, the distance between the two positioning planes in the third direction gradually decreases.

6. The PCBN indexable tool grinding and positioning fixture according to claim 5, characterized in that: The dimension of the limiting member in the second direction is smaller than the dimension of the PCBN indexable tool in the second direction.

7. The PCBN indexable tool grinding and positioning fixture according to claim 5, characterized in that: The PCBN indexable tool grinding and positioning fixture further includes a mounting seat and a tensioning member, wherein the mounting seat includes a limiting hole and a connecting groove, wherein the limiting hole penetrates the mounting seat along the first direction, and the connecting groove is recessed from one side of the mounting seat in the third direction toward the inside of the mounting seat, and the connecting groove is connected to the limiting hole; The engaging member is arranged in the limiting hole, and the tensioning member can apply force to the mounting seat so that two parts of the mounting seat located on both sides of the engaging groove in the second direction are close to each other.

8. The PCBN indexable tool grinding and positioning fixture according to claim 7, characterized in that: A plurality of scale lines are arranged on a side of the mounting seat facing away from the supporting member, and the plurality of scale lines are arranged at equal intervals along the circumference of the limiting hole; A marking portion is arranged on a side of the connecting piece facing away from the supporting member, and the connecting piece can rotate in the limiting hole so that the marking portion points to one of the scale lines.

9. The PCBN indexable tool grinding and positioning fixture according to claim 7, characterized in that: The supporting member encloses a first communicating cavity, and a first hole is formed on a side of the supporting member facing away from the connecting member in the first direction, and the first hole is communicated with the first communicating cavity; The connecting member encloses a second connecting cavity, and a second hole is formed on a side of the connecting member facing away from the supporting member in the first direction, the second hole is connected to the second connecting cavity, and the first connecting cavity is connected to the second connecting cavity.

10. A grinding device, characterized in that: The grinding device comprises a grinding machine and a PCBN indexable tool grinding and positioning fixture according to any one of claims 1 to 9, wherein the PCBN indexable tool grinding and positioning fixture is fixed on the grinding machine.

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