Positioning clamp for chain wheel machining

Abstract

The invention relates to the technical field of positioning clamps, and discloses a chain wheel machining positioning clamp which comprises a clamp body, a chain wheel groove is formed in the side wall of one side of the clamp body, a cavity is formed in the clamp body, a square hole communicating with the chain wheel groove is formed in the side wall of the cavity, and a square block is slidably connected to the inner wall of the square hole. One end of the square block is fixedly connected with a baffle ring, the other end of the square block is fixedly connected with a chuck, and a conical hole is formed in one end of the chuck. According to the chain wheel machining device, the chuck is matched with the rotating rod and the like for use, an inner hole of a chain wheel can be supported, then the outer wall of the chain wheel is machined, the clamping assembly is matched with the driving assembly and the like for use, the outer wall of the chain wheel can be clamped, then the inner hole of the chain wheel is machined, and during machining, when accessories do not need to be replaced, the machining efficiency is improved. After the outer wall of the chain wheel is cut, the outer wall of the chain wheel can be clamped only by reversing the rotating rod, an inner hole of the chain wheel is directly cut, and then machining of the chain wheel is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of positioning fixtures, in particular to a positioning fixture for sprocket processing. Background Art

[0002] A sprocket is a wheel with cog-type sprocket teeth, which is used to mesh with blocks with accurate pitch on link chains or cables. The sprocket needs to be processed through multiple steps such as cutting, hobbing, quenching and keyway milling. During processing, the outer diameter and inner diameter of the sprocket have high requirements, so during processing, a CNC lathe is required to turn the outer diameter and inner diameter of the sprocket to the required size. During turning, a three-jaw chuck is used as a positioning fixture for sprocket processing to fix the sprocket, and then cutting can be performed.

[0003] In a three-jaw chuck disclosed by authorization announcement number CN204276947U, it includes a chuck body, a claw slide groove is provided on the chuck body, a claw is slidably connected in the claw slide groove, a flat screw disk coaxial with the chuck is provided in the chuck body, the flat screw disk and the claw are connected by a plane thread structure, a large bevel gear is fixed on the back of the flat screw disk, a small bevel gear meshing with the large bevel wheel is rotatably provided on the chuck body, a rotating block is rotatably provided on the back of the small bevel gear, an operating part for driving the rotating block to rotate is provided on the end face of the rotating block, a control component is provided between the rotating block and the small bevel gear, and the control component can drive the rotating block and the small bevel gear to perform circumferential linkage and drive the rotating block to rotate alone. When the rotating block rotates forward, it can drive the small bevel gear to rotate together. When it rotates reversely, the rotating block does not work, so the wrench can be reset. The jaws can be loosened or clamped without pulling out the wrench. The above device is a kind of three-jaw chuck. However, when the three-jaw chuck is in use, three jaws are needed to support the inner hole of the sprocket, or three jaws are used to clamp the outer wall of the sprocket before cutting. Because the jaws used by the three-jaw chuck to support the inner hole and the jaws used to clamp the outer wall are different, during processing, after clamping the sprocket and turning the inner hole, the jaws need to be replaced. The clamping jaws must be replaced with the jaws supporting the inner hole before the three-jaw chuck can be used to support the sprocket and process the outer diameter of the sprocket, which is very troublesome.

[0004] Therefore, we propose a positioning fixture for sprocket processing to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art, and the proposed positioning fixture for sprocket processing can clamp the outer wall of the sprocket and directly cut the inner hole of the sprocket without replacing accessories during processing.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A positioning fixture for sprocket processing comprises a fixture body, a sprocket groove is formed on one side wall of the fixture body, a cavity is formed inside the fixture body, a square hole connected to the sprocket groove is formed on the side wall of the cavity, a square block is slidably connected to the inner wall of the square hole, a retaining ring is fixedly connected to one end of the square block, a chuck is fixedly connected to the other end of the square block, a conical hole is formed on one end of the chuck, a conical block is slidably connected to the inner wall of the conical hole, a rotating shaft is rotatably connected to one end of the conical block, and one end of the rotating shaft passes through the square block and extends to the inside of the cavity, a threaded rod is fixedly connected to one end of the rotating shaft located inside the cavity, and the cavity The inner wall of the body is fixedly connected with a fixing block, and a through hole is provided on one side wall of the fixing block, the inner wall of the through hole is fixedly connected with a bearing, and the inner wall of the bearing is fixedly connected with a threaded sleeve, one end of the threaded rod passes through the threaded sleeve, the threaded sleeve is threadedly connected to the threaded rod, the outer wall of the threaded sleeve is fixedly provided with a first gear, and the outer wall of the first gear is meshed with a second gear, one end of the second gear is fixedly connected with a rotating rod, and one end of the rotating rod passes through the clamp body, the inner wall of the sprocket groove is provided with a sliding cavity, and a clamping assembly is provided in the sliding cavity, an annular cavity is provided inside the fixed block, and a driving assembly is provided in the annular cavity.

[0007] Preferably, the clamping assembly includes a first piston slidably connected to the inner wall of the sliding cavity, and a pressure rod is fixedly connected to one side wall of the first piston, the outer wall of the pressure rod is fixedly sleeved with a first spring, and one end of the first spring is fixedly connected to the first piston, and the other end of the first spring is fixedly connected to the inner wall of the sliding cavity, and the inner wall of the sliding cavity is provided with a connecting hole connected to the annular cavity.

[0008] Preferably, the driving assembly includes a second piston slidably connected to the inner wall of the annular cavity, and a push rod is fixedly connected to one side wall of the second piston, one end of the push rod passes through the fixed block, one end of the push rod is fixedly connected to a top ring, and a second spring is sleeved on the outer wall of the push rod.

[0009] Preferably, a make way cavity connected to the annular cavity is formed on the inner wall of the clamp body, and a third piston is slidably connected to the inner wall of the make way cavity, and the side wall of the third piston is rotatably connected to a bolt, a countersunk hole is formed on the outer wall of the clamp body, and one end of the bolt passes through the clamp body and extends to the inside of the countersunk hole, and the bolt is threadedly connected to the clamp body.

[0010] Preferably, an annular hole is formed on the inner wall of the cavity, and a rubber bag is fixedly connected to the inner wall of the annular hole; an exhaust hole is formed on the inner wall of the annular hole, and a whistle is fixedly connected to the inner wall of the exhaust hole.

[0011] Preferably, a slip ring groove is provided on the outer wall of the clamp body, and an adding hole is provided on the outer wall of the slip ring groove, a counterweight block is slidably connected to the inner wall of the slip ring groove, and a stud is threadedly connected to the side wall of the counterweight block, and one end of the stud passes through the counterweight block.

[0012] Preferably, one end of the pressure rod is fixedly connected to a clamping copper block.

[0013] Preferably, a hexagonal hole is formed at one end of the rotating rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention can support the inner hole of the sprocket by setting a chuck and a rotating rod, etc. for use in combination, and then process the outer wall of the sprocket; and can clamp the outer wall of the sprocket by setting a clamping assembly and a driving assembly for use in combination, and then process the inner hole of the sprocket; and during processing, there is no need to replace accessories. After the outer wall of the sprocket is cut, it is only necessary to reverse the rotating rod to clamp the outer wall of the sprocket and directly cut the inner hole of the sprocket, thereby facilitating the processing of the sprocket.

[0015] According to the present invention, after the sprocket processing is completed, the forward rotating rod can cause the first spring to push the clamping assembly to release the clamping of the sprocket. At the same time, the forward rotating rod can drive the threaded rod through the first gear and the second gear to push the square block and the chuck to move, so that the chuck and the square block push the cut sprocket out of the sprocket groove, thereby facilitating the removal of the cut sprocket, and further facilitating the processing of the sprocket.

[0016] The present invention, by setting a give way chamber, a third piston and a bolt for use in conjunction, can enable the third piston to move by rotating the bolt when the second piston presses the air in the annular chamber into the sliding chamber, thereby adjusting the space in which the air in the annular chamber can be pressed into the give way chamber, and further adjusting the amount of air that can be pressed into the give way chamber, so as to increase or reduce the speed of the air that can be pressed into the sliding chamber, and further adjusting the pressure of the sliding chamber to press the first piston and the pressure rod, and adjusting the force of the pressure rod to clamp the outer wall of the sprocket, so as to avoid the problem that the pressure rod may damage the outer wall of the product after cutting due to excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of the positioning fixture for sprocket processing proposed by the present invention; Figure 2 It is a schematic cross-sectional structure diagram of the positioning fixture for sprocket processing proposed by the present invention; Figure 3 A schematic diagram of the fixed block structure of the positioning fixture for sprocket processing proposed by the present invention; Figure 4 A schematic diagram of the partial structure of the positioning fixture for sprocket processing proposed by the present invention; Figure 5 for Figure 2 The enlarged structural diagram at A in the middle; Figure 6 for Figure 2 The enlarged structural diagram at B in the middle; Figure 7 for Figure 2 The enlarged structural diagram at C in the middle; Figure 8 for Figure 2 Schematic diagram of the structure enlarged at point D in the middle.

[0018] In the figure: 1, fixture body; 2, sprocket groove; 3, cavity; 4, square block; 5, retaining ring; 6, chuck; 7, tapered hole; 8, tapered block; 9, rotating shaft; 10, threaded rod; 11, fixed block; 12, bearing; 13, threaded sleeve; 14, first gear; 15, second gear; 16, rotating rod; 17, sliding cavity; 18, annular cavity; 19, first piston; 20, pressure rod; 21, first spring; 22, connecting hole; 23, second piston; 24, push rod; 25, push ring; 26, second spring; 27, give way cavity; 28, third piston; 29, bolt; 30, countersunk hole; 31, annular hole; 32, rubber bag; 33, exhaust hole; 34, whistle; 35, sliding ring groove; 36, adding hole; 37, counterweight block; 38, stud; 39, clamping copper block; 40, hexagonal hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example See also Figure 1-8A positioning fixture for sprocket processing includes a fixture body 1, a sprocket groove 2 is provided on one side wall of the fixture body 1, and a cavity 3 is provided inside the fixture body 1, a square hole connected to the sprocket groove 2 is provided on the side wall of the cavity 3, a square block 4 is slidably connected to the inner wall of the square hole, and a retaining ring 5 is fixedly connected to one end of the square block 4, a chuck 6 is fixedly connected to the other end of the square block 4, a conical hole 7 is provided at one end of the chuck 6, and a conical block 8 is slidably connected to the inner wall of the conical hole 7, one end of the conical block 8 is rotatably connected to a rotating shaft 9, and one end of the rotating shaft 9 passes through the square block 4 and extends to the inside of the cavity 3, one end of the rotating shaft 9 located inside the cavity 3 is fixedly connected to a threaded rod 10, and the inner wall of the cavity 3 is fixedly connected A fixed block 11 is provided, and a through hole is provided on one side wall of the fixed block 11, a bearing 12 is fixedly connected to the inner wall of the through hole, and a threaded sleeve 13 is fixedly connected to the inner wall of the bearing 12, one end of the threaded rod 10 passes through the threaded sleeve 13, the threaded sleeve 13 is threadedly connected to the threaded rod 10, a first gear 14 is fixedly provided on the outer wall of the threaded sleeve 13, and a second gear 15 is meshed with the outer wall of the first gear 14, one end of the second gear 15 is fixedly connected to a rotating rod 16, and one end of the rotating rod 16 passes through the fixture body 1, a sliding cavity 17 is provided on the inner wall of the sprocket groove 2, and a clamping assembly is provided in the sliding cavity 17, an annular cavity 18 is provided inside the fixed block 11, and a driving assembly is provided in the annular cavity 18.

[0021] It can be seen from the above structure that: by setting the chuck 6 and the rotating rod 16 for use in conjunction with each other, the inner hole of the sprocket can be supported, and then the outer wall of the sprocket can be processed, and by setting the clamping assembly and the driving assembly for use in conjunction with each other, the outer wall of the sprocket can be clamped, and then the inner hole of the sprocket can be processed, and during processing, there is no need to replace accessories. After cutting the outer wall of the sprocket, you only need to reverse the rotating rod 16 to clamp the outer wall of the sprocket and directly cut the inner hole of the sprocket, thereby facilitating the processing of the sprocket.

[0022] Furthermore, the clamping assembly includes a first piston 19 which is slidably connected to the inner wall of the sliding cavity 17, and a pressure rod 20 is fixedly connected to one side wall of the first piston 19, a first spring 21 is fixedly sleeved on the outer wall of the pressure rod 20, and one end of the first spring 21 is fixedly connected to the first piston 19, and the other end of the first spring 21 is fixedly connected to the inner wall of the sliding cavity 17, and a connecting hole 22 which is connected to the annular cavity 18 is provided on the inner wall of the sliding cavity 17; by arranging the first piston 19 and the pressure rod 20 for use in combination, when the first piston 19 and the pressure rod 20 move downward, the downwardly moved pressure rod 20 can clamp and fix the sprocket.

[0023] Furthermore, the driving assembly includes a second piston 23 which is slidably connected to the inner wall of the annular cavity 18, and a push rod 24 is fixedly connected to a side wall of one side of the second piston 23, one end of the push rod 24 passes through the fixed block 11, one end of the push rod 24 is fixedly connected to a top ring 25, and a second spring 26 is sleeved on the outer wall of the push rod 24; by arranging the second piston 23, the push rod 24 and the top ring 25 for use in combination, when the second piston 23 is pressed, the second piston 23 can press the air in the annular cavity 18 into the sliding cavity 17, thereby driving the clamping assembly to clamp.

[0024] Furthermore, a clearance cavity 27 communicating with the annular cavity 18 is provided on the inner wall of the fixture body 1, and a third piston 28 is slidably connected to the inner wall of the clearance cavity 27, and the side wall of the third piston 28 is rotatably connected to the bolt 29, and a countersunk hole 30 is provided on the outer wall of the fixture body 1, and one end of the bolt 29 passes through the fixture body 1 and extends to the inside of the countersunk hole 30, and the bolt 29 is threadedly connected to the fixture body 1; by setting the clearance cavity 27, the third piston 28 and the bolt 29, etc., when the second piston 23 presses the air in the annular cavity 18 into the sliding cavity 17, the second piston 23 can also press the air into the clearance cavity 27, thereby reducing the pressure in the sliding cavity 17, avoiding the problem that the pressure rod 20 may crush the outer wall of the product after cutting due to excessive pressure, and rotating the bolt 29 can drive the third piston 28 to move, adjust the space in which the air in the annular cavity 18 can be pressed into the clearance cavity 27, and then adjust the amount of air that can be pressed into the clearance cavity 27.

[0025] Furthermore, an annular hole 31 is provided on the inner wall of the cavity 3, and a rubber bag 32 is fixedly connected to the inner wall of the annular hole 31, an exhaust hole 33 is provided on the inner wall of the annular hole 31, and a whistle 34 is fixedly connected to the inner wall of the exhaust hole 33; by setting the annular hole 31, the rubber bag 32 and the whistle 34 for use in combination, the rotating rod 16 can drive the threaded rod 10 through the first gear 14 and the second gear 15 to push the square block 4 and the chuck 6 to move when the chuck 6 and the square block 4 push the cut sprocket out of the sprocket groove 2, and the moving square block 4 drives the retaining ring 5 to move, and when the retaining ring 5 is close to one end of the cavity 3, the retaining ring 5 squeezes the rubber bag 32, so that the rubber bag 32 presses the air in the annular hole 31 out through the exhaust hole 33, and the pressed air blows the whistle 34, and the rotation of the rotating rod 16 can be stopped by the sound of the whistle 34.

[0026] Furthermore, a slip ring groove 35 is provided on the outer wall of the clamp body 1, and an adding hole 36 is provided on the outer wall of the slip ring groove 35, a counterweight 37 is slidably connected to the inner wall of the slip ring groove 35, and a stud 38 is threadedly connected to the side wall of the counterweight 37, and one end of the stud 38 passes through the counterweight 37; by arranging the counterweight 37 for use with the stud 38, the counterweight 37 can be added into the slip ring groove 35 through the adding hole 36, and then the stud 38 is rotated to move the counterweight 37 until the counterweight 37 moves to tightly abut against the inner wall of the slip ring groove 35, thereby fixing the counterweight 37.

[0027] Furthermore, one end of the pressure rod 20 is fixedly connected to a clamping copper block 39. By providing the clamping copper block 39, when the pressure rod 20 clamps the sprocket, the clamping area of ​​the sprocket can be increased and the pressure when the sprocket is clamped can be reduced, thereby further protecting the sprocket and preventing it from clamping the sprocket whose outer wall has been cut.

[0028] Furthermore, a hexagon socket 40 is provided at one end of the rotating rod 16 . By providing the hexagon socket 40 , a hexagon socket wrench can be used to cooperate with the hexagon socket 40 to rotate the rotating rod 16 .

[0029] In the present invention, before use, the device is clamped on the chuck of a CNC lathe. When in use, the sprocket to be processed is sleeved on the outer wall of the chuck 6, and then the rotating rod 16 is rotated. The rotating rotating rod 16 drives the second gear 15 to rotate, and the rotating second gear 15 drives the first gear 14 to rotate. The rotating first gear 14 drives the threaded sleeve 13 to rotate, and the rotating threaded sleeve 13 drives the threaded rod 10 to move. The moving threaded rod 10 pushes the rotating shaft 9 and the tapered block 8 to move, and the moving tapered block 8 opens the chuck 6, so that the chuck 6 supports the inner hole of the sprocket, thereby fixing the sprocket, and then the lathe can be started to cut the outer wall of the sprocket. After the sprocket cutting of the lathe is completed, the rotating rod 16 is reversed, so that the rotating rod 16 cooperates with the first gear 14 through the second gear 15 to drive the threaded sleeve 13 to reverse, and the reversed threaded sleeve 13 drives the threaded rod 10 to pull the rotating shaft 9, the conical block 8, the chuck 6 and the retaining ring 5 to move, and the moving chuck 6 moves the sprocket with the outer diameter cut into the sprocket groove 2. When the sprocket moves into the sprocket groove 2, the threaded rod 10 that continues to move pulls the retaining ring 5 so that the retaining ring 5 is against the top ring 25, and the moving top ring 25 presses the top ring 25. The rod 24 and the second piston 23 enable the second piston 23 to press the air in the annular cavity 18 into the sliding cavity 17. The air entering the sliding cavity 17 presses the first piston 19 and the pressure rod 20, so that the pressure rod 20 moves downward and clamps the sprocket in the sprocket groove 2. At this time, the inner hole of the sprocket can be cut. The above device can clamp the outer wall of the sprocket and directly cut the inner hole of the sprocket by only reversing the rotating rod 16 without replacing accessories. After the sprocket processing is completed, the forward rotating rod 16 can make the first spring 21 push the clamping assembly to release the clamping of the sprocket. At the same time, the forward rotating rod 16 can drive the threaded rod 10 through the first gear 14 and the second gear 15 to push the square block 4 and the chuck 6 to move, so that the chuck 6 and the square block 4 push the cut sprocket out of the sprocket groove 2, thereby making it convenient to take down the cut sprocket, further facilitating the processing of the sprocket. When the rotating rod 16 rotates forwardly, the threaded rod 10 can be driven by the first gear 14 and the second gear 15 to push the square block 4 and the chuck 6 to move, so that when the chuck 6 and the square block 4 push the cut sprocket out of the sprocket groove 2, the moving square block 4 drives the retaining ring 5 to move. When the retaining ring 5 is close to one end of the cavity 3, the retaining ring 5 squeezes the rubber bag 32, so that the rubber bag 32 presses the air in the annular hole 31 out through the exhaust hole 33. The pressed air hits the whistle 34, and the rotation of the rotating rod 16 can be stopped by the sound of the whistle 34, and then the sprocket can be removed.

[0030] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for sprocket processing, comprising a fixture body (1), characterized in that: A sprocket groove (2) is provided on one side wall of the clamp body (1), and a cavity (3) is provided inside the clamp body (1). A square hole communicating with the sprocket groove (2) is provided on the side wall of the cavity (3). A square block (4) is slidably connected to the inner wall of the square hole, and a retaining ring (5) is fixedly connected to one end of the square block (4). A chuck (6) is fixedly connected to the other end of the square block (4). A conical hole (7) is provided on one end of the chuck (6), and a conical block (8) is slidably connected to the inner wall of the conical hole (7). One end of the conical block (8) is rotatably connected to a rotating shaft (9), and one end of the rotating shaft (9) passes through the square block (4) and extends to the inside of the cavity (3). One end of the rotating shaft (9) located inside the cavity (3) is fixedly connected to a threaded rod (10). The inner wall of the cavity (3) is fixedly connected to a fixed block (11). A through hole is provided on one side wall of the fixed block (11); a bearing (12) is fixedly connected to the inner wall of the through hole; a threaded sleeve (13) is fixedly connected to the inner wall of the bearing (12); one end of the threaded rod (10) passes through the threaded sleeve (13); the threaded sleeve (13) is threadedly connected to the threaded rod (10); a first gear (14) is fixedly provided on the outer wall of the threaded sleeve (13); a second gear (15) is meshed with the outer wall of the first gear (14); one end of the second gear (15) is fixedly connected to a rotating rod (16); one end of the rotating rod (16) passes through the clamp body (1); a sliding cavity (17) is provided on the inner wall of the sprocket groove (2); a clamping assembly is provided in the sliding cavity (17); an annular cavity (18) is provided inside the fixed block (11); a driving assembly is provided in the annular cavity (18).

2. The positioning fixture for sprocket processing according to claim 1, characterized in that: The clamping assembly comprises a first piston (19) slidably connected to the inner wall of the sliding cavity (17), and a pressure rod (20) is fixedly connected to a side wall of one side of the first piston (19), and a first spring (21) is fixedly sleeved on the outer wall of the pressure rod (20), and one end of the first spring (21) is fixedly connected to the first piston (19), and the other end of the first spring (21) is fixedly connected to the inner wall of the sliding cavity (17), and the inner wall of the sliding cavity (17) is provided with a connecting hole (22) connected to the annular cavity (18).

3. The positioning fixture for sprocket processing according to claim 2, characterized in that: The driving assembly comprises a second piston (23) slidably connected to the inner wall of the annular cavity (18), and a push rod (24) is fixedly connected to a side wall of one side of the second piston (23), one end of the push rod (24) passes through the fixed block (11), one end of the push rod (24) is fixedly connected to a push ring (25), and a second spring (26) is sleeved on the outer wall of the push rod (24).

4. The positioning fixture for sprocket processing according to claim 3, characterized in that: The inner wall of the clamp body (1) is provided with a clearance cavity (27) which is in communication with the annular cavity (18), and the inner wall of the clearance cavity (27) is slidably connected to a third piston (28), and the side wall of the third piston (28) is rotatably connected to a bolt (29), and the outer wall of the clamp body (1) is provided with a countersunk hole (30), and one end of the bolt (29) passes through the clamp body (1) and extends to the inside of the countersunk hole (30), and the bolt (29) is threadedly connected to the clamp body (1).

5. The positioning fixture for sprocket processing according to claim 1, characterized in that: The inner wall of the cavity (3) is provided with an annular hole (31), and a rubber bag (32) is fixedly connected to the inner wall of the annular hole (31); the inner wall of the annular hole (31) is provided with an exhaust hole (33), and a whistle (34) is fixedly connected to the inner wall of the exhaust hole (33).

6. The positioning fixture for sprocket processing according to claim 1, characterized in that: The outer wall of the clamp body (1) is provided with a slip ring groove (35), and the outer wall of the slip ring groove (35) is provided with an addition hole (36); the inner wall of the slip ring groove (35) is slidably connected to a counterweight block (37), and the side wall of the counterweight block (37) is threadedly connected to a stud (38), and one end of the stud (38) passes through the counterweight block (37).

7. The positioning fixture for sprocket processing according to claim 2, characterized in that: One end of the pressure rod (20) is fixedly connected to a clamping copper block (39).

8. The positioning fixture for sprocket processing according to claim 1, characterized in that: A hexagonal hole (40) is formed at one end of the rotating rod (16).

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