Cutting positioning tool for bearing machining

Abstract

The application discloses a cutting positioning tool for bearing machining, and relates to the technical field of metal pipe cutting machining, which comprises a supporting device for lifting a metal pipe when the metal pipe is cut, and through relative sliding of an arc plate and a sliding rod, clamping force is automatically limited at the moment of pipe wall adhesion, supporting rigidity is just matched with the required anti-torsion moment of cutting, insufficient clamping force is prevented from causing circumferential pipe slip during cutting to generate tool collapse, and excessive pre-tightening force is avoided from causing pipe wall rebound impact on the tool at the moment of cutting through due to stress release, the service life of the cutting tool is significantly prolonged, end face vibration marks are eliminated, and the inclined surface of the pressing rod decomposes the vertical pressure into horizontal and vertical components when the limit key is pressed downward, the horizontal component always pushes the sliding frame to tightly adhere to the front sidewall of the positioning groove, the vertical component wedges the limit key into the bottom of the positioning groove, and the process risk of tool deflection caused by support overload is avoided at the moment of the cutting tool cutting into the metal pipe.

Description

Technical Field

[0001] This invention relates to the field of metal pipe cutting and processing technology, specifically to a cutting and positioning fixture for bearing processing. Background Technology

[0002] Bearing rings are the core components of rolling bearings, and their machining quality directly determines the bearing's rotational accuracy, vibration noise, and service life. In the machining process of bearing rings, cutting the bearing steel tube into individual ring blanks according to a predetermined width is a crucial first step. The clamping and positioning accuracy and cutting quality of this step have a decisive impact on the uniformity of subsequent turning and grinding machining allowances and the finished product qualification rate.

[0003] While existing bearing machining cutting and positioning fixtures can quickly fix metal tubes and complete cutting operations in actual use, there is a serious disconnect between their clamping method and the cutting process. When operators rely on subjective experience to drive the clamping mechanism, uneven prestress and micro-deformation are easily generated within the tube wall. This pre-deformation, at the moment the cutter enters the tube wall and the stress field of the tube is redistributed, can induce local springback or cutter deflection in the tube wall, directly resulting in a serious deviation in the perpendicularity of the cut end face relative to the tube axis. Furthermore, the roundness of the inner hole of the bearing ring blank after cutting cannot meet the allowance requirements of the subsequent fine grinding process. More importantly, traditional fixtures lack an adaptive clamping force mechanism for the cutting process. Cutting chatter caused by tube wall vibration and insufficient clamping rigidity during cutter entry leaves obvious vibration marks on the bearing ring end face, becoming the root cause of bearing operating noise. Therefore, there is an urgent need for a positioning fixture oriented towards the cutting process requirements, so that the clamping action and the cutting action are coordinated, ensuring the flatness and geometric accuracy of the bearing ring end face from the source. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a cutting and positioning fixture for bearing processing, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a cutting and positioning fixture for bearing processing, comprising a power source disposed on the surface of the base plate, a fixed plate fixedly connected to the output end of the power source, a sliding frame slidably connected to the base plate, an electric push rod disposed on the surface of the sliding frame, a sliding table sliding on the surface of the sliding frame, and a cutter fixedly connected to the sliding table; the cutting and positioning fixture for bearing processing includes a clamping device for fixing and clamping a metal tube workpiece, a support device for lifting the metal tube when cutting the metal tube, and an auxiliary device for adjusting the position of the cutter and the metal tube; The clamping device includes a circular plate slidably connected to the fixed plate, a sliding rod slidably connected to the circular plate, an arc plate slidably connected to the sliding rod, a locking key disposed on the inner wall of the fixed plate, a push plate slidably connected to the circular plate, and a connecting rod rotatably connecting the push plate and the fixed plate. A slot is provided on the side of the circular plate near the locking key.

[0006] The clamping device further includes a first insert rod that slides on the inner wall of the sliding rod, a push rod that rotatably connects the first insert rod to the arc plate, a second insert rod that is fixedly connected to the first insert rod, a pressure block that is fixedly connected to the arc plate, and a first positioning block that slides on the inner wall of the arc plate. The push plate has a slot on the side near the second insert rod, and the second insert rod contacts the inner wall of the slot. The circular plate has a positioning groove on the side near the first positioning block.

[0007] An elastic element is provided between the sliding rod and the arc plate, an elastic element is provided between the circular plate and the fixed plate, an elastic element is provided between the positioning block and the sliding rod, and an elastic element is provided on the side of the pressure block near the positioning block.

[0008] The support device includes a push block fixedly connected to the circular plate, a positioning rod sliding on the inner wall of the fixed plate, a fixed frame fixedly connected to the sliding frame, a pressing rod fixedly connected to the sliding table, and a limiting key slidably connected to the inner wall of the sliding frame. A positioning groove is provided on the side of the base plate near the limiting key.

[0009] The support device further includes a sliding block that slides on the inner wall of the sliding frame, a sliding outer rod fixed on the surface of the sliding frame, a second push plate that slides on the inner wall of the sliding outer rod, a first connecting rod that rotatably connects the second push plate to the sliding block, a support frame that slides on the inner wall of the sliding outer rod, a buffer plate that slides on the inner wall of the support frame, a pressing block that is fixedly connected to the buffer plate, a sliding rod that slides on the inner wall of the support frame, and a second connecting rod that rotatably connects the pressing block to the sliding rod. The second push plate has a slot on the side near the sliding rod, and the sliding rod contacts the inner wall of the slot.

[0010] An elastic element is provided between the support frame and the sliding outer rod. An inclined surface is provided on the side of the pressing rod near the limiting key. An elastic element is provided between the limiting key and the sliding frame. A sliding groove is provided on the side of the positioning rod near the push block. An inclined surface is provided on the side of the push block near the positioning rod. An elastic element is provided between the positioning rod and the fixed plate. An elastic element is provided between the buffer plate and the support frame.

[0011] The auxiliary device includes a hydraulic device one fixedly connected to the sliding outer rod, a pressure plate slidably connected to the hydraulic device one, a hydraulic device two fixedly connected to the sliding table, and a positioning block two sliding on the inner wall of the support frame. The hydraulic device one includes a cylinder one and a piston rod one, with the piston rod one sliding on the inner wall of the cylinder one. The hydraulic device two includes a cylinder two and a piston rod two, with the piston rod two sliding on the inner wall of the cylinder two. The cylinder one and cylinder two are connected by a hose. The pressure plate is fixedly connected to the piston rod one and the support frame. The piston rod two is fixedly connected to the bottom of the cutter. A slot is provided on the side of the sliding outer rod near the positioning block two.

[0012] The auxiliary device also includes a rotating plate rotatably connected to the support frame, a plug fixedly connected to the rotating plate, a rack fixedly connected to the rotating shaft of the rotating plate, and a gear fixedly connected to the buffer plate.

[0013] The second positioning block has an inclined surface on the side near the buffer plate, and an elastic element is provided between the second positioning block and the support frame. The buffer plate has a slot on the side near the insertion block.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, the sliding rod pushes the arc plate to tighten from the inner wall of the metal tube outward. The internal support clamping force is evenly distributed on the circumference of the inner wall of the tube. Its primary purpose is not merely to fix the workpiece, but to provide a cutting reference with high roundness for the cutter. Unlike the traditional external clamping method that causes radial deformation of the tube, this ensures that the tube cross-section always maintains its initial roundness throughout the cutting process. This allows the cutter to feed stably in a direction perpendicular to the tube axis, fundamentally guaranteeing the perpendicularity and flatness of the bearing ring cutting end face. It also significantly reduces the impact load of subsequent turning processes. The internal support method ensures that the clamping force is evenly distributed on the circumference of the inner wall of the tube, significantly reducing radial deformation of the tube, ensuring that the cutting end face is perpendicular to the tube axis, and improving the flatness of the cross-section.

[0015] 2. In this invention, the relative sliding of the arc plate and the sliding rod automatically limits the clamping force at the moment of contact with the pipe wall, so that the support stiffness is just matched with the anti-torsional torque required for cutting. This not only prevents the pipe from circumferentially slipping and causing blade breakage due to insufficient clamping force, but also avoids excessive pre-tightening force causing the pipe wall to rebound and impact the blade at the moment of cutting due to stress release. This significantly extends the service life of the cutter and eliminates end face vibration marks. When the inclined surface of the pressing rod presses down on the limiting key, it suppresses the stress release impact at the moment of cutting and avoids blade breakage.

[0016] 3. In this invention, the piston rod is retracted into the hydraulic device by the pressure plate, and the liquid inside the hydraulic device is forced into the hydraulic device 2 through the hose. This pushes the piston rod 2 to extend and drives the cutter to move upward synchronously. The rise of the support frame is strictly and proportionally transmitted to the cutter through the principle of constant liquid volume, so that the lifting height of the cutter and the extension of the support frame always remain the same. This avoids the cumbersome operation and potential mis-setting of the cutter height that requires manual adjustment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the positional structure of the circular plate and sliding rod of the present invention; Figure 3 This is a schematic diagram showing the positional structure of the push block and positioning rod of the present invention; Figure 4 This is a schematic diagram showing the positional structure of the connecting rod and the push plate of the present invention; Figure 5 This is a schematic diagram showing the positional structure of the pressure block and the positioning block 1 of the present invention; Figure 6 This is a schematic diagram showing the position and structure of the pressing rod and the limiting key of the present invention; Figure 7 This is a schematic diagram of the positioning rod and fixing frame position structure of the present invention; Figure 8 This is a schematic diagram of the rack and gear position structure of the present invention; Figure 9 This is a schematic diagram of the position and structure of the support frame and buffer plate of the present invention.

[0018] The meanings of the labels in the diagram are as follows: 1. Base plate; 2. Power source; 21. Push block; 22. Positioning rod; 23. Fixing frame; 24. Pressing rod; 25. Limit key; 26. Sliding block; 27. Connecting rod one; 28. Sliding outer rod; 29. ​​Push plate two; 291. Support frame; 292. Buffer plate; 293. Pressing block; 294. Connecting rod two; 295. Sliding rod; 3. Fixing plate; 4. Sliding frame; 5. Electric push rod; 6. 7. Sliding table; 8. Cutter; 9. Circular plate; 10. Sliding rod; 11. Arc plate; 12. Locking key; 13. Connecting rod one; 14. Push plate one; 15. Insert rod one; 16. Push rod; 17. Insert rod two; 18. Pressure block; 19. Positioning block one; 20. Hydraulic device one; 31. Hydraulic device two; 32. Pressing plate; 33. Positioning block two; 34. Rotating plate; 35. Inserting block; 36. Rack; 37. Gear. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-9 One embodiment of the present invention is: a cutting and positioning fixture for bearing processing, comprising a power source 2 disposed on the surface of a base plate 1, a fixed plate 3 fixedly connected to the output end of the power source 2, a sliding frame 4 slidably connected to the base plate 1, an electric push rod 5 disposed on the surface of the sliding frame 4, a sliding table 6 sliding on the surface of the sliding frame 4, and a cutter 7 fixedly connected to the sliding table 6. The cutting and positioning fixture for bearing processing includes a clamping device for fixing and clamping a metal tube workpiece, a support device for lifting the metal tube when cutting the metal tube, and an auxiliary device for adjusting the position of the cutter 7 and the metal tube. The clamping device includes a circular plate 8 slidably connected to the fixed plate 3, a sliding rod 9 slidably connected to the circular plate 8, an arc plate 10 slidably connected to the sliding rod 9, a locking key 11 disposed on the inner wall of the fixed plate 3, a push plate 13 slidably connected to the circular plate 8, and a connecting rod 12 rotatably connecting the push plate 13 and the fixed plate 3. A slot is provided on the side of the circular plate 8 near the locking key 11.

[0021] The clamping device also includes a first insertion rod 14 that slides on the inner wall of the sliding rod 9, a push rod 15 that rotatably connects the first insertion rod 14 to the arc plate 10, a second insertion rod 16 that is fixedly connected to the first insertion rod 14, a pressure block 17 that is fixedly connected to the arc plate 10, and a positioning block 18 that slides on the inner wall of the arc plate 10. The push plate 13 has a slot on the side near the second insertion rod 16, and the second insertion rod 16 contacts the inner wall of the slot. The circular plate 8 has a positioning groove on the side near the positioning block 18.

[0022] An elastic element is provided between the sliding rod 9 and the arc plate 10, an elastic element is provided between the circular plate 8 and the fixed plate 3, an elastic element is provided between the positioning block 18 and the sliding rod 9, and an elastic element is provided on the side of the pressure block 17 near the positioning block 18.

[0023] In this embodiment, when processing a metal tube is required, the metal tube needs to be fixed on the surface of the fixed plate 3. The metal tube is then fitted onto the outer wall of the sliding rod 9. After fitting, the circular plate 8 is pushed towards the fixed plate 3. The circular plate 8 then pushes the push plate 13 via the connecting rod 12. The movement of the push plate 13, in turn, drives the sliding rod 9 towards the inner wall of the metal tube via the insertion rod 16. The sliding rod 9 then pushes the arc plate 10 into contact with the inner wall of the metal tube. After the arc plate 10 is in contact with the metal tube, its continued movement will cause the arc plate 10 to move relative to the sliding rod 9. When the arc plate 10 moves, it pushes the push rod 15 to move. The movement of the push rod 15 will pull the insert rod 16 away from the push plate 13 via the insert rod 14. The contact between the insert rod 16 and the push plate 13 will be released. When the arc plate 10 is in contact with the inner wall of the metal tube, the push plate 13 cannot continue to apply pressure to the metal tube by driving the arc plate 10 through the sliding rod 9. When the arc plate 10 and the sliding rod 9 move relative to each other, they will drive the pressure block 17 to move towards the positioning block 18. The inclined surface of the pressure block 17 will then contact the positioning block 18, and the pressure block 17 will push the positioning block 18. Block 18 is inserted into the slot on the surface of the fixed plate 3 to fix the sliding rod 9. When the sliding rod 9 is fixed, the arc plate 10 is also fixed. After the sliding rod 9 and the arc plate 10 are fixed, the sliding rod 9 and the arc plate 10 will apply stable pressure to the inner wall of the metal tube to clamp and fix the metal tube from the inside. After the round plate 8 has moved, the locking key 11 on the inner wall of the fixed plate 3 will be inserted into the slot on the surface of the round plate 8 to fix the round plate 8. After the whole is fixed, the position of the cutter 7 cutting the metal tube can be controlled by moving the sliding frame 4. The moving rod pushes the arc plate outward from the inner wall of the metal tube to tighten it. This internal clamping force is evenly distributed on the circumference of the inner wall of the tube. Its primary purpose is not only to fix the workpiece, but also to provide a cutting reference with high roundness for the cutter 7. Unlike the traditional external clamping method that causes radial deformation of the tube, it ensures that the tube cross-section always maintains its initial roundness during the entire cutting process. This allows the cutter 7 to feed stably in a direction perpendicular to the tube axis, fundamentally ensuring the perpendicularity and flatness of the bearing ring cutting end face, and significantly reducing the impact load of subsequent turning processes.

[0024] Please see Figures 1-9 Based on the above embodiments, in another embodiment of the present invention, the support device includes a push block 21 fixedly connected to the circular plate 8, a positioning rod 22 sliding on the inner wall of the fixed plate 3, a fixed frame 23 fixedly connected to the sliding frame 4, a pressing rod 24 fixedly connected to the sliding table 6, and a limiting key 25 slidably connected to the inner wall of the sliding frame 4. A positioning groove is provided on the side of the bottom plate 1 near the limiting key 25.

[0025] The support device also includes a sliding block 26 that slides on the inner wall of the sliding frame 4, a sliding outer rod 28 that is fixed on the surface of the sliding frame 4, a push plate 29 that slides on the inner wall of the sliding outer rod 28, a connecting rod 27 that rotatably connects the push plate 29 and the sliding block 26, a support frame 291 that slides on the inner wall of the sliding outer rod 28, a buffer plate 292 that slides on the inner wall of the support frame 291, a pressing block 293 that is fixedly connected to the buffer plate 292, a sliding rod 295 that slides on the inner wall of the support frame 291, and a connecting rod 294 that rotatably connects the pressing block 293 and the sliding rod 295. The push plate 29 has a slot on the side near the sliding rod 295, and the sliding rod 295 contacts the inner wall of the slot.

[0026] An elastic element is provided between the support frame 291 and the sliding outer rod 28. The pressing rod 24 has an inclined surface on the side near the limit key 25. An elastic element is provided between the limit key 25 and the sliding frame 4. A sliding groove is provided on the side of the positioning rod 22 near the push block 21. The side of the push block 21 near the positioning rod 22 is set with an inclined surface. An elastic element is provided between the positioning rod 22 and the fixed plate 3. An elastic element is provided between the buffer plate 292 and the support frame 291.

[0027] The auxiliary device includes a hydraulic device 31 fixedly connected to the sliding outer rod 28, a pressure plate 33 slidably connected to the hydraulic device 31, a hydraulic device 32 fixedly connected to the sliding table 6, and a positioning block 34 sliding on the inner wall of the support frame 291. The hydraulic device 31 includes a cylinder and a piston rod, with the piston rod sliding on the inner wall of the cylinder. The hydraulic device 32 includes a cylinder and a piston rod, with the piston rod sliding on the inner wall of the cylinder. The cylinder and cylinder are connected by a hose. The pressure plate 33 is fixedly connected to the piston rod and the support frame 291. The piston rod is fixedly connected to the bottom of the cutter 7. A slot is provided on the side of the sliding outer rod 28 near the positioning block 34.

[0028] The auxiliary device also includes a rotating plate 35 rotatably connected to the support frame 291, an insert block 36 fixedly connected to the rotating plate 35, a rack 37 fixedly connected to the rotating shaft of the rotating plate 35, and a gear 38 fixedly connected to the buffer plate 292.

[0029] The side of the positioning block 2 34 near the buffer plate 292 is set as an inclined surface. An elastic element is provided between the positioning block 2 34 and the support frame 291. A slot is opened on the side of the buffer plate 292 near the insertion block 36.

[0030] In this embodiment, when the circular plate 8 moves towards the fixed plate 3, it pushes the push block 21 to move. When the push block 21 moves, its inclined surface contacts the groove on the surface of the positioning rod 22. The push block 21 then pushes the positioning rod 22 away from the fixed frame 23, thus releasing the fixation of the positioning rod 22 on the sliding frame 4. At this time, the position of the sliding frame 4 can be adjusted after the metal tube is fixed to control the position to be cut. During adjustment, the inclined surface of the limit key 25 contacts the positioning groove on the surface of the base plate 1. The friction generated between the limit key 25 and the positioning groove makes the adjustment of the sliding frame 4 more accurate. Indeed, after adjustment, the electric push rod 5 pushes the sliding table 6 to move the cutter 7 toward the metal tube. The movement of the sliding table 6 will cause the pressing rod 24 to move toward the limit key 25. The inclined surface of the pressing rod 24 will press the limit key 25 downward, and the limit key 25 will be fully inserted into the positioning groove on the surface of the base plate 1 to fix the sliding frame 4, so that the sliding frame 4 cannot move when cutting the metal tube. When the sliding table 6 moves, it will push the sliding block 26 to move. The movement of the sliding block 26 will drive the push plate 29 to move through the connecting rod 27. The movement of the push plate 29 will drive the support frame 29 through the sliding rod 295. 1. Moving upwards, the support frame 291 moves upwards, causing the buffer plate 292 to come into contact with the surface of the metal tube. After contact, the support frame 291 continues to move, causing the support frame 291 and the buffer plate 292 to move relative to each other. The buffer plate 292 then slides towards the inner wall of the support frame 291, pushing the pressing block 293 to move. The movement of the pressing block 293, through the connecting rod 294, pushes the sliding rod 295 to move away from the push plate 29. After the buffer plate 292 contacts the metal tube, the push plate 29 can no longer move the support frame 291. The contact between the buffer plate 292 and the surface of the metal tube is thus complete. The metal tube being cut is lifted up. Once the buffer plate 292 is in contact with the surface of the metal tube, the continued rise of the support frame 291 no longer pushes the buffer plate 292 to further press the tube wall. Instead, the movement direction is reversed by the pressing block 293 and the connecting rod 294, causing the sliding rod 295 to retract away from the push plate 29. The supporting force of the buffer plate 292 on the metal tube is always limited to the level of the initial contact force, which is sufficient to offset the downward deformation of the tube wall caused by its own weight, and will not cause additional compressive stress to the tube wall. This fundamentally eliminates the process risk of tube wall deformation or cutter 7 deviation due to support overload.

[0031] When the support frame 291 moves upward, it presses the piston rod 1 towards the hydraulic device 31 via the pressure plate 33. This movement of the piston rod 31 causes the fluid inside the hydraulic device 31 to enter the hydraulic device 2 32 through the hose. Simultaneously, the upward movement of the support frame 291 drives the cutter 7 to move upward, enabling it to cut metal pipes of different sizes. When the buffer plate 292 moves towards the support frame 291, it pushes the positioning block 2 34 into the sliding outer rod 28. The positioning block 2 34 then fixes the extended support frame 291 in the corresponding position to prevent it from retracting. The movement of the buffer plate 292 towards the support frame 291 also drives the rack 37 to move. The rack 37's movement drives the gear 38 to rotate, which in turn drives the rotating plate 35 to rotate in the direction of the buffer plate 292. Rotation causes the insert block 36 to move, which then inserts into the buffer plate 292 to fix it in place. This prevents the buffer plate 292 from popping up after cutting due to loss of resistance. When rotating, the rotating plate 35 blocks the end face of the metal tube, preventing it from falling off and causing an impact after cutting. When the support frame 291 moves upward, the locking of the insert block 36 fixes the buffer plate 292 the instant it is in the retracted state, preventing it from popping up suddenly due to elastic reset. This avoids the safety hazard of the buffer plate 292 popping up suddenly after cutting due to loss of resistance. When rotating, the rotating plate 35 not only drives the insert block 36 to lock the buffer plate 292, but also flips itself to the outside of the end face of the metal tube, forming a physical barrier that axially blocks the cut collar, preventing the material from falling off and preventing the collar from flying directly out of the tooling area.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cutting and positioning fixture for bearing processing, comprising a power source (2) disposed on the surface of a base plate (1), a fixed disk (3) fixedly connected to the output end of the power source (2), a sliding frame (4) slidably connected to the base plate (1), an electric push rod (5) disposed on the surface of the sliding frame (4), a sliding table (6) slidably on the surface of the sliding frame (4), a cutter (7) fixedly connected to the sliding table (6), and a circular plate (8) slidably connected to the fixed disk (3), the cutting and positioning fixture for bearing processing, characterized in that, A clamping device for fixing and clamping metal tube workpieces, a support device for lifting metal tubes during cutting, and an auxiliary device for adjusting the position of the cutter (7) and the metal tube. The feed motion of the cutter (7) and the internal support clamping action of the clamping device are coupled through a linkage mechanism, so that at the moment the cutter (7) cuts into the metal tube wall, the clamping device automatically adjusts the clamping force to counteract the rebound of the tube wall caused by the cutting force. The support device lifts the tube wall near the cutting point synchronously with the feed of the cutter (7) to suppress chatter during the cutting process and ensure the perpendicularity of the end face. The support device includes a push block (21) fixedly connected to the circular plate (8), a positioning rod (22) sliding on the inner wall of the fixed plate (3), a fixed frame (23) fixedly connected to the sliding frame (4), a pressing rod (24) fixedly connected to the sliding table (6), and a limiting key (25) slidingly connected to the inner wall of the sliding frame (4). The bottom plate (1) has a positioning groove on the side near the limiting key (25).

2. The cutting and positioning fixture for bearing processing according to claim 1, characterized in that: The support device further includes a sliding block (26) that slides on the inner wall of the sliding frame (4), a sliding outer rod (28) fixed on the surface of the sliding frame (4), a push plate (29) that slides on the inner wall of the sliding outer rod (28), a connecting rod (27) that rotatably connects the push plate (29) and the sliding block (26), a support frame (291) that slides on the inner wall of the sliding outer rod (28), a buffer plate (292) that slides on the inner wall of the support frame (291), a pressing block (293) that is fixedly connected to the buffer plate (292), a sliding rod (295) that slides on the inner wall of the support frame (291), and a connecting rod (294) that rotatably connects the pressing block (293) and the sliding rod (295). The push plate (29) has a slot on the side near the sliding rod (295), and the sliding rod (295) contacts the inner wall of the slot.

3. The cutting and positioning fixture for bearing processing according to claim 2, characterized in that: An elastic element is provided between the support frame (291) and the sliding outer rod (28). The pressing rod (24) has an inclined surface on the side near the limiting key (25). An elastic element is provided between the limiting key (25) and the sliding frame (4). A sliding groove is provided on the side of the positioning rod (22) near the push block (21). An inclined surface is provided on the side of the push block (21) near the positioning rod (22). An elastic element is provided between the positioning rod (22) and the fixed plate (3). An elastic element is provided between the buffer plate (292) and the support frame (291).

4. The cutting and positioning fixture for bearing processing according to claim 1, characterized in that: The clamping device includes a sliding rod (9) slidably connected to the circular plate (8), an arc plate (10) slidably connected to the sliding rod (9), a locking key (11) disposed on the inner wall of the fixed disk (3), a push plate (13) slidably connected to the circular plate (8), and a connecting rod (12) rotatably connecting the push plate (13) and the fixed disk (3). The circular plate (8) has a slot on the side near the locking key (11).

5. The cutting and positioning fixture for bearing processing according to claim 4, characterized in that: The clamping device further includes a first insert rod (14) that slides on the inner wall of the sliding rod (9), a push rod (15) that rotatably connects the first insert rod (14) to the arc plate (10), a second insert rod (16) that is fixedly connected to the first insert rod (14), a pressure block (17) that is fixedly connected to the arc plate (10), and a first positioning block (18) that slides on the inner wall of the arc plate (10). The push plate (13) has a slot on the side near the second insert rod (16), and the second insert rod (16) contacts the inner wall of the slot. The circular plate (8) has a positioning groove on the side near the first positioning block (18).

6. The cutting and positioning fixture for bearing processing according to claim 5, characterized in that: An elastic element is provided between the sliding rod (9) and the arc plate (10), an elastic element is provided between the circular plate (8) and the fixed plate (3), an elastic element is provided between the positioning block (18) and the sliding rod (9), and an elastic element is provided on the side of the pressure block (17) near the positioning block (18).

7. The cutting and positioning fixture for bearing processing according to claim 2, characterized in that: The auxiliary device includes a hydraulic device one (31) fixedly connected to the sliding outer rod (28), a pressure plate (33) slidably connected to the hydraulic device one (31), a hydraulic device two (32) fixedly connected to the sliding table (6), and a positioning block two (34) sliding on the inner wall of the support frame (291). The hydraulic device one (31) includes a cylinder one and a piston rod one, the piston rod one sliding on the inner wall of the cylinder one. The hydraulic device two (32) includes a cylinder two and a piston rod two, the piston rod two sliding on the inner wall of the cylinder two. The cylinder one and the cylinder two are connected by a hose. The pressure plate (33) is fixedly connected to the piston rod one. The pressure plate (33) is fixedly connected to the support frame (291). The piston rod two is fixedly connected to the bottom of the cutter (7). The sliding outer rod (28) has a slot on the side near the positioning block two (34).

8. The cutting and positioning fixture for bearing processing according to claim 7, characterized in that: The auxiliary device also includes a rotating plate (35) rotatably connected to the support frame (291), a plug (36) fixedly connected to the rotating plate (35), a rack (37) fixedly connected to the rotating shaft of the rotating plate (35), and a gear (38) fixedly connected to the buffer plate (292).

9. The cutting and positioning fixture for bearing processing according to claim 8, characterized in that: The second positioning block (34) is inclined on the side near the buffer plate (292), and an elastic element is provided between the second positioning block (34) and the support frame (291). The buffer plate (292) has a slot on the side near the insert block (36).

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