Deformed internal spline positioning clamp

Abstract

The utility model discloses a deformed internal spline positioning clamp, which belongs to the technical field of clamps and comprises a base, a centering clamping component for clamping a workpiece is mounted on the front side of the top of the base, a stamping head is arranged above the workpiece, an oil spraying component for spraying lubricating oil is mounted on the rear side of the top of the base, and the oil spraying component is connected with the stamping head. A buffering clamping assembly used for buffering the push broach is installed at the bottom of the base and comprises a buffering assembly and a clamping assembly. According to the mode, a workpiece can be clamped and fixed through the centering clamping assembly, so that the correction effect of spline deformation is further improved, lubrication can be achieved, friction force can be reduced, the service life of the push broach can be prolonged, the falling push broach does not need to be manually received, the falling push broach can be buffered, and the service life of the push broach is prolonged. And the push broach is prevented from being damaged during falling.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a deformed internal spline positioning clamp. Background Art

[0002] An internal spline is a mechanical connection element, typically used to connect a shaft and a sleeve to transmit torque or prevent relative rotation. During production, the spline may be slightly deformed. This can be corrected by using a punching mechanism to drive a pusher. Clamping the deformed spline requires ensuring central symmetry or coaxiality, further improving the effectiveness of spline deformation correction.

[0003] Chinese patent CN208391141U discloses an internal spline secondary positioning broaching fixture structure, including a reference metal, a left stripper rod and a right stripper rod are provided on the reference metal, the left stripper rod and the right stripper rod are slidably connected to a pusher plate, a workpiece is provided on the pusher plate, a first positioning pin and a second positioning pin are installed at the bottom of the workpiece, a pusher connecting plate is fixedly installed on one side of the pusher plate, the pusher connecting plate is fixedly connected to a pusher card plate, the pusher card plate is fixedly connected to a pusher cylinder, the pusher card plate is slidably connected to a pusher guide rail, a positioning base plate is provided at the bottom of the pusher plate, a pre-positioning plate is installed on the positioning base plate, a first set screw and a second set screw are installed in the pre-positioning plate, and a stripper cylinder is installed on one side of the positioning base plate.

[0004] However, this patent cannot automatically spray lubricating oil on the processing position when processing the internal spline, and manual lubricating oil needs to be applied, which wastes manpower.

[0005] Based on this, the utility model designs a deformed internal spline positioning fixture to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a deformable internal spline positioning fixture.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A deformed internal spline positioning fixture includes a base;

[0009] A centering clamping assembly for clamping a workpiece is installed on the top front side of the base, and a punching head is provided above the workpiece;

[0010] An oil spray assembly for spraying lubricating oil is installed on the top rear side of the base, and the oil spray assembly is connected to the punch head;

[0011] A buffer clamping assembly for buffering the push knife is installed at the bottom of the base;

[0012] The buffer clamping assembly comprises a buffer assembly and a clamping assembly. The buffer assembly is arranged in the middle of the base, and the buffer assembly and the clamping assembly are connected.

[0013] Furthermore, the centering clamping assembly includes a motor, a bidirectional threaded rod, a sliding rod, a movable plate, a V-shaped plate and a mounting block, the two mounting blocks are respectively fixedly connected to the left and right sides of the top of the base, the motor is fixedly connected to the left end of the mounting block on the left, a bidirectional threaded rod and a sliding rod are connected between the two mounting blocks, the two ends of the bidirectional threaded rod are respectively rotatably connected to the two mounting blocks, the two ends of the sliding rod are respectively fixedly connected to the two mounting blocks, the motor output shaft rotates through the mounting block on the left and is coaxially connected to the left end of the bidirectional threaded rod, the threads of the left and right ends of the bidirectional threaded rod rotate in opposite directions, the left and right ends of the bidirectional threaded rod are threadedly connected to the movable plates, the front ends of the two movable plates are slidably connected to the sliding rod, and the rear ends of the opposite sides of the two movable plates are fixedly connected to the V-shaped plates.

[0014] Furthermore, the oil injection assembly includes an oil tank, an oil inlet pipe, a first one-way valve, an oil outlet pipe, an annular nozzle, a connecting rod, a connecting plate, a second one-way valve and a fixed plate. The bottom of the rear side of the oil tank is fixedly connected to the oil inlet pipe, the oil inlet pipe is fixedly connected to the first one-way valve, the bottom of the front side of the oil tank is fixedly connected to the oil outlet pipe, the front end of the oil outlet pipe is fixedly connected to the annular nozzle, the outer side of the annular nozzle is fixedly connected to the oil tank, the annular nozzle is arranged above the clamped workpiece, the second one-way valve is fixedly connected to the oil outlet pipe, the bottom end of the connecting rod slides through the top of the oil tank, extends to the inside and is fixedly connected to the connecting plate, the outer walls of the connecting plate are fitted and slidably connected to the inner wall of the oil tank, the top of the connecting rod is fixedly connected to the fixing plate, and the front end of the fixing plate is fixedly connected to the punching head.

[0015] Furthermore, the oil tank is fixedly connected to the top rear side of the base.

[0016] Furthermore, the buffer assembly includes a support plate, a spring, an inclined plate, a blanking plate and a through hole. The support plate is fixedly connected to the middle bottom part of the base. A plurality of springs are fixedly connected to the inner wall of the bottom end of the support plate. The top of the plurality of springs is fixedly connected to the inclined plate. The inclined plate is inclined to the right. The right bottom of the support plate is fixedly connected to the blanking plate set obliquely. A through hole is opened in the middle top part of the base, and the through hole is located directly above the inclined plate.

[0017] Furthermore, the support plate and the inclined plate are both connected to the clamping assembly.

[0018] Furthermore, the clamping assembly includes a clamping plate, a protrusion, a fixed block, a roller, a torsion spring and a fixed rod. The front and rear ends of the inclined plate are fixedly connected to the fixed rod, and the middle part of the fixed rod is rotatably connected to the clamping plate. The two torsion springs are respectively mounted on the outside of the two ends of the fixed rod, and the two ends of the torsion spring are respectively fixedly connected to the inclined plate and the clamping plate. The inner tops of the two clamping plates are fixedly connected to the protrusions, and the front and rear inner walls of the support plate are fixedly connected to the fixed blocks. The ends of the two fixed blocks close to each other are rotatably connected to the rollers, and the two rollers are respectively rollingly connected to the outer side surfaces of the two clamping plates.

[0019] Furthermore, a sponge pad is fixedly connected to the inner side of the protrusion.

[0020] The utility model has the following technical effects:

[0021] When the utility model is used, the workpiece is placed at the processing position on the base, and then the push knife is placed on the workpiece and cooperates with the splines in the workpiece. The stamping equipment drives the stamping head to move downward, and the stamping head drives the push knife to move downward to correct the internal splines of the workpiece. At the same time, the stamping head drives the oil spraying assembly to spray lubricating oil on the push knife. The push knife moves under the action of the stamping equipment and gravity. When the push knife completes the correction of the internal splines of the workpiece, it falls on the buffer assembly. The buffer assembly buffers the push knife and unloads the buffer clamping assembly. The clamping assembly clamps the push knife to prevent it from falling out of the buffer assembly.

[0022] When the utility model is clamping, the motor drives the bidirectional threaded rod to rotate, and then the movable plate drives the V-shaped plates to move toward each other to clamp the workpiece, thereby further improving the correction effect of spline deformation.

[0023] When the utility model sprays oil, the punching equipment drives the punching head to move downward, the punching head drives the fixed plate to move downward, the fixed plate drives the connecting rod and the connecting plate to move downward, so that the connecting plate squeezes the lubricating oil in the oil tank into the oil outlet pipe, and then flows into the annular nozzle through the second one-way valve, and finally sprays from the annular nozzle onto the push knife, lubricating the workpiece when the push knife corrects it, reducing friction and extending the service life of the push knife;

[0024] When the utility model is used, after the push knife falls onto the inclined plate, the clamping limit of the clamping plate and the elastic buffer of the spring enable the push knife to slide from the inclined surface of the inclined plate to the blanking plate and finally slide to the ground. There is no need to manually catch the falling push knife, and the falling push knife can be buffered to prevent the push knife from being damaged when falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0026] Figure 1 The three-dimensional deformation internal spline positioning fixture of the utility model Figure 1 ;

[0027] Figure 2 This is a front view of the deformed internal spline positioning fixture of the present invention;

[0028] Figure 3 The three-dimensional deformation internal spline positioning fixture of the utility model Figure 2 ;

[0029] Figure 4 The three-dimensional deformation internal spline positioning fixture of the utility model Figure 3 ;

[0030] Figure 5 The three-dimensional deformation internal spline positioning fixture of the utility model Figure 4 ;

[0031] Figure 6 To follow Figure 2 AA direction cross-sectional view;

[0032] Figure 7 for Figure 6 Enlarged view of point B in the middle.

[0033] The numbers in the figure represent:

[0034] 1. Base; 2. Centering clamping assembly; 21. Motor; 22. Bidirectional threaded rod; 23. Slide rod; 24. Moving plate; 25. V-shaped plate; 26. Mounting block; 3. Oil injection assembly; 31. Oil tank; 32. Oil inlet pipe; 33. First one-way valve; 34. Oil outlet pipe; 35. Annular nozzle; 36. Connecting rod; 37. Connecting plate; 38. Second one-way valve; 39. Fixed plate; 4. Punching head; 5. Buffer clamping assembly; 51. Buffer assembly; 511. Support plate; 512. Spring; 513. Inclined plate; 514. Blanking plate; 515. Through hole; 52. Clamping assembly; 521. Clamping plate; 522. Bump; 523. Fixed block; 524. Roller; 525. Torsion spring; 526. Fixed rod; 6. Push knife; 7. Workpiece. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] The present invention will be further described below with reference to the embodiments.

[0037] The terms “left,” “right,” “front,” “back,” “up,” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0038] Example 1

[0039] Please refer to the instruction manual Figure 1-7 A deformed internal spline positioning fixture includes a base 1, a centering clamping assembly 2 for clamping a workpiece 7 is installed on the top front side of the base 1, a punching head 4 is provided above the workpiece 7, an oil spraying assembly 3 for spraying lubricating oil is installed on the top rear side of the base 1, the oil spraying assembly 3 is connected to the punching head 4, and a buffer clamping assembly 5 for buffering the push knife 6 is installed at the bottom of the base 1.

[0040] The buffer and clamping assembly 5 includes a buffer assembly 51 and a clamping assembly 52 . The buffer assembly 51 is disposed in the middle of the base 1 , and the buffer assembly 51 and the clamping assembly 52 are connected.

[0041] The oil injection assembly 3 is connected to an external oil tank (not shown), and the punch head 4 is fixedly connected to an output end (not shown) of the punching device. The punch head 4 can drive the push knife 6 to move downward.

[0042] During use, the workpiece 7 is placed at the processing position on the base 1, and then the push knife 6 is placed on the workpiece 7 and cooperates with the spline inside the workpiece 7. The stamping equipment drives the punching head 4 to move downward, and the punching head 4 drives the push knife 6 to move downward to correct the internal spline of the workpiece 7. At the same time, the punching head 4 drives the oil spraying assembly 3 to spray lubricating oil on the push knife 6. The push knife 6 moves under the action of the stamping equipment and gravity. When the push knife 6 completes the correction of the internal spline of the workpiece 7, it falls on the buffer assembly 51. The buffer assembly 51 buffers the push knife 6 and unloads the buffer clamping assembly 5. The clamping assembly 52 clamps the push knife 6 to prevent it from falling out of the buffer assembly 51.

[0043] The centering clamping assembly 2 includes a motor 21, a bidirectional threaded rod 22, a sliding rod 23, a movable plate 24, a V-shaped plate 25 and a mounting block 26. The two mounting blocks 26 are respectively fixedly connected to the left and right sides of the top of the base 1. The motor 21 is fixedly connected to the left end of the mounting block 26 on the left. The bidirectional threaded rod 22 and the sliding rod 23 are connected between the two mounting blocks 26. The two ends of the bidirectional threaded rod 22 are rotatably connected to the two mounting blocks 26 respectively, and the two ends of the sliding rod 23 are fixedly connected to the two mounting blocks 26 respectively. The output shaft of the motor 21 rotates through the mounting block 26 on the left and is coaxially connected to the left end of the bidirectional threaded rod 22. The threads of the left and right ends of the bidirectional threaded rod 22 rotate in opposite directions. The left and right ends of the bidirectional threaded rod 22 are threadedly connected to the movable plates 24. The front ends of the two movable plates 24 are slidably connected to the sliding rod 23, and the rear ends of the opposite sides of the two movable plates 24 are fixedly connected with the V-shaped plates 25.

[0044] When the workpiece 7 needs to be clamped, the motor 21 drives the bidirectional threaded rod 22 to rotate, and the bidirectional threaded rod 22 drives the two movable plates 24 to move toward each other under the guidance of the slide rod 23, and the two movable plates 24 drive the V-shaped plates 25 to move toward each other, thereby clamping and fixing the workpiece 7, thereby further improving the correction effect of spline deformation.

[0045] In this embodiment, the oil injection assembly 3 includes an oil tank 31, an oil inlet pipe 32, a first one-way valve 33, an oil outlet pipe 34, an annular nozzle 35, a connecting rod 36, a connecting plate 37, a second one-way valve 38 and a fixing plate 39. The oil inlet pipe 32 is fixedly connected to the bottom of the rear side of the oil tank 31, the first one-way valve 33 is fixedly connected to the oil inlet pipe 32, the oil outlet pipe 34 is fixedly connected to the bottom of the front side of the oil tank 31, and the annular nozzle 35 is fixedly connected to the front end of the oil outlet pipe 34. The outer side surface of the nozzle 35 is fixedly connected to the oil tank 31. The annular nozzle 35 is arranged above the clamped workpiece 7. A second one-way valve 38 is fixedly connected to the oil outlet pipe 34. The bottom end of the connecting rod 36 slides through the top of the oil tank 31 and extends to the inside and is fixedly connected to a connecting plate 37. The outer walls of the connecting plate 37 are fitted and slidably connected to the inner wall of the oil tank 31. The top of the connecting rod 36 is fixedly connected to a fixing plate 39. The front end of the fixing plate 39 is fixedly connected to the punching head 4.

[0046] Preferably, the oil tank 31 is fixedly connected to the top rear side of the base 1 .

[0047] Preferably, the oil inlet pipe 32 is fixedly connected to an external oil tank.

[0048] During oil spraying, the push knife 6 is located on the inner side of the annular nozzle 35, the stamping equipment drives the punching head 4 to move downward, the punching head 4 drives the fixed plate 39 to move downward, the fixed plate 39 drives the connecting rod 36 and the connecting plate 37 to move downward, so that the connecting plate 37 squeezes the lubricating oil in the oil tank 31 into the oil outlet pipe 34, and then flows into the annular nozzle 35 through the second one-way valve 38, and finally sprays onto the push knife 6 from the annular nozzle 35, and lubricates the push knife 6 when the push knife corrects the workpiece 7, reducing friction and extending the service life of the push knife 6.

[0049] After correction, the stamping equipment drives the stamping head 4 to move upward, the stamping head 4 drives the fixed plate 39 to move upward, and the fixed plate 39 drives the connecting rod 36 and the connecting plate 37 to move upward, so that the connecting plate 37 moves upward to suck the external oil tank into the oil tank 31 through the oil inlet pipe 32 and the first one-way valve 33, preparing for the next oil injection.

[0050] In this embodiment, the buffer assembly 51 includes a support plate 511, a spring 512, an inclined plate 513, a blanking plate 514 and a through hole 515. The support plate 511 is fixedly connected to the middle part of the bottom of the base 1. A plurality of springs 512 are fixedly connected to the inner wall of the bottom end of the support plate 511. The top of the plurality of springs 512 is fixedly connected to the inclined plate 513. The inclined plate 513 is inclined to the right. The right bottom of the support plate 511 is fixedly connected to the inclined blanking plate 514. A through hole 515 is opened in the middle part of the top of the base 1, and the through hole 515 is located directly above the inclined plate 513.

[0051] Preferably, the support plate 511 and the inclined plate 513 are both connected to the clamping assembly 52 .

[0052] The clamping assembly 52 includes a clamping plate 521, a protrusion 522, a fixing block 523, a roller 524, a torsion spring 525 and a fixing rod 526. The front and rear ends of the inclined plate 513 are fixedly connected to the fixing rod 526. The middle part of the fixing rod 526 is rotatably connected to the clamping plate 521. The two torsion springs 525 are respectively mounted on the outer sides of the two ends of the fixing rod 526. The two ends of the torsion spring 525 are respectively fixedly connected to the inclined plate 513 and the clamping plate 521. The inner top of the two clamping plates 521 is fixedly connected to the protrusion 522. The front and rear inner walls of the support plate 511 are fixedly connected to the fixing block 523. The ends of the two fixing blocks 523 close to each other are rotatably connected to the rollers 524. The two rollers 524 are respectively rollingly connected to the outer side surfaces of the two clamping plates 521.

[0053] Preferably, a sponge pad is fixedly connected to the inner side of the protrusion 522 to increase the friction with the push knife 6 and prevent the push knife 6 from being damaged by friction with the protrusion 522.

[0054] When in use, the workpiece 7 is placed at the processing position on the base 1, and the middle processing hole of the workpiece 7 is aligned with the through hole 515, and then the push knife 6 is placed on the workpiece 7 and cooperates with the spline in the workpiece 7; then the stamping equipment drives the punching head 4 to move downward, and the punching head 4 drives the push knife 6 to move downward to correct the internal spline of the workpiece 7; when the push knife 6 completes the correction and leaves the workpiece 7, the push knife 6 falls on the inclined plate 513 under the action of gravity, and the inclined plate 513 compresses the spring 512 downward. At the same time, the front and rear ends of the inclined plate 513 drive the clamping plate 521 to move downward. At this time, the clamping plate 521 drives the roller 524 to roll along the outer side of the clamping plate 521, thereby driving the bottom of the clamping plate 521 to rotate around the fixed rod 526, so that the two fixed blocks 523 clamp the push knife 6. The torsion generated by the torsion spring 525 twisted by the fixed rod 526 can The cam 524 is engaged with the support member 526 and the support member 527, and the support member 528 is engaged with the support member 529. The cam 524 is engaged with the support member 529 and the support member 529, and the support member 529 is engaged with the support member 521.

[0055] 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A deformed internal spline positioning fixture, comprising a base (1), characterized in that: A centering clamping assembly (2) for clamping a workpiece (7) is installed on the top front side of the base (1), and a punching head (4) is provided above the workpiece (7); An oil spray assembly (3) for spraying lubricating oil is installed on the top rear side of the base (1), and the oil spray assembly (3) is connected to the punch head (4); A buffer clamping assembly (5) for buffering the push knife (6) is installed at the bottom of the base (1); The buffer clamping assembly (5) comprises a buffer assembly (51) and a clamping assembly (52); the buffer assembly (51) is arranged in the middle of the base (1); and the buffer assembly (51) and the clamping assembly (52) are connected.

2. The deformed internal spline positioning fixture according to claim 1, characterized in that: The centering clamping assembly (2) comprises a motor (21), a bidirectional threaded rod (22), a slide rod (23), a movable plate (24), a V-shaped plate (25) and a mounting block (26), wherein the two mounting blocks (26) are fixedly connected to the left and right sides of the top of the base (1), respectively, the motor (21) is fixedly connected to the left end of the mounting block (26) on the left side, the bidirectional threaded rod (22) and the slide rod (23) are connected between the two mounting blocks (26), and the two ends of the bidirectional threaded rod (22) are respectively connected to the two mounting blocks (26) for rotation. The two ends of the slide bar (23) are fixedly connected to the two mounting blocks (26) respectively. The output shaft of the motor (21) rotates through the mounting block (26) on the left and is coaxially connected to the left end of the bidirectional threaded rod (22). The threads of the left and right ends of the bidirectional threaded rod (22) rotate in opposite directions. The left and right ends of the bidirectional threaded rod (22) are both threadedly connected to the moving plates (24). The front ends of the two moving plates (24) are both slidably connected to the slide bar (23). The rear ends of the opposite sides of the two moving plates (24) are fixedly connected to the V-shaped plates (25).

3. The deformed internal spline positioning fixture according to claim 2, characterized in that: The oil injection assembly (3) comprises an oil tank (31), an oil inlet pipe (32), a first one-way valve (33), an oil outlet pipe (34), an annular nozzle (35), a connecting rod (36), a connecting plate (37), a second one-way valve (38) and a fixing plate (39). The bottom of the rear side of the oil tank (31) is fixedly connected to the oil inlet pipe (32), the first one-way valve (33) is fixedly connected to the oil inlet pipe (32), the bottom of the front side of the oil tank (31) is fixedly connected to the oil outlet pipe (34), the front end of the oil outlet pipe (34) is fixedly connected to the annular nozzle (35), and the annular nozzle (35) is fixedly connected to the annular nozzle (35). The outer side of the annular nozzle (35) is fixedly connected to the oil tank (31), the annular nozzle (35) is arranged above the clamped workpiece (7), the oil outlet pipe (34) is fixedly connected to a second one-way valve (38), the bottom end of the connecting rod (36) slides through the top of the oil tank (31) and extends to the inside and is fixedly connected to a connecting plate (37), the outer walls of the connecting plate (37) are fitted and slidably connected to the inner wall of the oil tank (31), the top of the connecting rod (36) is fixedly connected to a fixing plate (39), and the front end of the fixing plate (39) is fixedly connected to the punching head (4).

4. The deformed internal spline positioning fixture according to claim 3, characterized in that: The oil tank (31) is fixedly connected to the top rear side of the base (1).

5. The deformed internal spline positioning fixture according to claim 4, characterized in that: The buffer assembly (51) comprises a support plate (511), a spring (512), an inclined plate (513), a blanking plate (514) and a through hole (515). The support plate (511) is fixedly connected to the middle of the bottom of the base (1). A plurality of springs (512) are fixedly connected to the inner wall of the bottom end of the support plate (511). The tops of the plurality of springs (512) are fixedly connected to the inclined plate (513). The inclined plate (513) is tilted to the right. The right bottom of the support plate (511) is fixedly connected to the blanking plate (514) arranged obliquely. A through hole (515) is provided in the middle of the top of the base (1). The through hole (515) is located directly above the inclined plate (513).

6. The deformed internal spline positioning fixture according to claim 5, characterized in that: The support plate (511) and the inclined plate (513) are both connected to the clamping assembly (52).

7. The deformed internal spline positioning fixture according to claim 6, characterized in that: The clamping assembly (52) comprises a clamping plate (521), a protrusion (522), a fixing block (523), a roller (524), a torsion spring (525) and a fixing rod (526). The front and rear ends of the inclined plate (513) are fixedly connected to the fixing rod (526). The middle part of the fixing rod (526) is rotatably connected to the clamping plate (521). Two torsion springs (525) are respectively sleeved on the outer sides of the two ends of the fixing rod (526). The two ends of the torsion spring (525) are respectively fixedly connected to the inclined plate (513) and the clamping plate (521). The inner tops of the two clamping plates (521) are fixedly connected to the protrusion (522). The front and rear inner walls of the support plate (511) are fixedly connected to the fixing block (523). The ends of the two fixing blocks (523) close to each other are rotatably connected to the rollers (524). The two rollers (524) are respectively rollingly connected to the outer side surfaces of the two clamping plates (521).

8. The deformed internal spline positioning fixture according to claim 7, characterized in that: A sponge pad is fixedly connected to the inner side of the protrusion (522).

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