A device for polishing the inner circle of a stainless steel workpiece

Abstract

The application provides an inner circle polishing device for stainless steel workpieces, and relates to the technical field of inner circle polishing equipment. The device comprises an inner circle polishing assembly which is composed of a driving mechanism, a polishing mechanism and an adapting mechanism. The inner circle polishing assembly can automatically adapt to the inner diameter of the inner circle of the stainless steel workpiece for grinding operation without separate regulation and control. When polishing, the polishing mechanism is in contact with the inner circle surface of the stainless steel workpiece by using flexible force, which can effectively avoid problems such as overloading and fragmentation of the polishing wheel and out-of-roundness of the inner circle of the workpiece during the polishing process. The position of the polishing wheel of the existing inner circle polishing device is rigidly positioned. When the polished stainless steel workpiece has roundness error, uneven wall thickness and other tolerances during polishing, rigid feeding can easily cause overloading and fragmentation of the polishing wheel or out-of-roundness of the inner circle of the workpiece.

Description

Technical Field

[0001] This invention relates to the field of automated polishing technology, and more particularly to an inner circle polishing device for stainless steel workpieces. Background Technology

[0002] Stainless steel machined parts are widely used in food, medicine, chemical energy, precision machinery and other fields. The quality of the inner surface of the parts directly affects their performance and lifespan. Polishing the inner surface of stainless steel machined parts can remove tool marks, burrs and surface oxide layers left after turning, milling and other machining processes, significantly reduce surface roughness, improve surface smoothness and flatness, enhance the corrosion resistance and wear resistance of the parts, improve the sealing performance and assembly accuracy of mating surfaces, ensure the smoothness of fluid transportation and the purity of the medium, and meet the high precision and high cleanliness requirements of various industries for stainless steel parts.

[0003] Existing stainless steel internal polishing devices have the following drawbacks when in use: 1. Most of them adopt an eccentric polishing structure, that is, the polishing shaft is offset from the inner circle center, and the grinding operation is achieved by the polishing block at the end of the shaft contacting the inner wall of the stainless steel workpiece. The number of contact points during polishing is small, and the polishing efficiency is low. 2. The position of the polishing wheel relies entirely on the rigid positioning of the feed assembly and cannot automatically adapt to the inner circle size. This means that when the stainless steel workpiece to be polished has tolerance issues such as roundness error, uneven wall thickness, or inconsistent local machining allowance, the rigid feed is prone to overload and breakage of the polishing wheel, or cause the inner circle of the workpiece to become out of round. It can also cause surface quality defects such as local over-polishing and under-polishing, resulting in poor processing stability and consistency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an inner circle polishing device for stainless steel workpieces, thereby solving the problems mentioned in the background section.

[0005] This invention provides an inner circle polishing device for stainless steel workpieces, specifically comprising: a base assembly, the base assembly including a mounting base, a centering chuck, and a chuck motor, the centering chuck being rotatably connected to the side of the mounting base, and the chuck motor being fixedly installed outside the mounting base, the chuck motor being drively connected to the rotating shaft of the centering chuck; and an inner circle polishing assembly, the inner circle polishing assembly consisting of a driving mechanism, a polishing mechanism, and an adaptation mechanism; The drive mechanism includes a feed seat, a polishing motor, a polishing spindle, and a feed push rod. The feed seat is inserted into the top of the mounting base. The polishing motor is fixedly mounted on the side of the feed seat. The polishing spindle is rotatably connected inside the feed seat, and the shafts of the polishing spindle and the polishing motor are connected by a drive connection. The feed push rod is fixedly mounted on the top of the mounting base, and one end of the push rod is fixedly mounted on the side of the feed seat. The polishing mechanism includes a retainer, a polishing wheel, and a linkage rod. The retainer is inserted into the outside of the polishing spindle, and the polishing wheel is rotatably connected to the top of the retainer. The linkage rod is rotatably connected inside the retainer. The adaptation mechanism includes a control rod, which is inserted into the inside of the polishing spindle.

[0006] Furthermore, the retainer is arranged radially along the polishing spindle, and the polishing mechanism is provided in four sets. The four sets of polishing mechanisms are evenly arranged circumferentially along the polishing spindle, and the polishing spindle and the centering chuck are arranged coaxially.

[0007] Furthermore, the adaptation mechanism also includes a pressure push block, a reference seat, a synchronization seat, and an adaptation push rod. The pressure push block is inserted into the inside of the control rod, the reference seat and the synchronization seat are both inserted into the outside of the control rod, and the adaptation push rod is fixedly installed inside the feed seat. One end of the adaptation push rod is fixedly installed on the side of the synchronization seat.

[0008] Furthermore, the control rod can only move axially inside the polishing spindle, and the pressure push block can only move axially inside the control rod. Both the control rod and the pressure push block are provided with synchronous rotating blocks on their exteriors. The synchronous rotating block of the control rod extends out of the polishing spindle and is rotatably connected to the interior of the reference seat, and the synchronous rotating block of the pressure push block extends out of the control rod and the polishing spindle and is rotatably connected to the interior of the synchronous seat.

[0009] Furthermore, the pressure push block is provided with a pressure top spring on its side, with the two ends of the pressure top spring abutting against the side of the pressure push block and the inside of the control rod, respectively.

[0010] Furthermore, the polishing mechanism also includes a transmission gear, which is rotatably connected inside the polishing spindle. A transmission rack is provided on the side of the feed seat. The transmission rack and the transmission gear mesh with each other, and the linkage rod and the rotating shaft of the polishing wheel are connected by a gear set.

[0011] Furthermore, the bottom section of the linkage rod is a regular polygon, and the transmission gear has a transmission groove inside, with the regular polygon section of the linkage rod inserted into the transmission groove.

[0012] Furthermore, the cage has an inclined positioning groove inside, and the control rod has a positioning rod outside, which is inserted into the positioning groove.

[0013] Furthermore, the polishing wheel is a split design, consisting of an end polishing part and a main polishing part, with the outer end of the end polishing part extending beyond the outermost end of the polishing spindle.

[0014] Furthermore, a monitoring target plate is provided on the side of the reference base, and a distance sensor is provided on the side of the synchronization base. The distance sensor can monitor the distance between the synchronization base and the reference base through the monitoring target plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Four polishing mechanisms, evenly distributed around the circumference of the polishing spindle, work synchronously. The polishing wheel's rotation following the spindle's revolution, its own rotation via transmission gears and racks, and the workpiece's rotation with the centering chuck create a triple motion effect. Compared to traditional single-wheel eccentric polishing structures, this increases polishing efficiency by more than four times, significantly shortening the processing cycle. The adaptability mechanism automatically adjusts to the inner diameter of stainless steel workpieces of different specifications, eliminating the need for manual adjustment of the polishing wheel's radial position, greatly improving ease of operation. During polishing, a pressure spring provides flexible polishing force, and a distance sensor monitors the distance between the synchronization seat and the reference seat in real time, allowing for precise control of polishing pressure. When the workpiece has roundness errors, uneven wall thickness, or inconsistent local machining allowances, the polishing wheel can automatically move the retainer inward to avoid these issues and compress the pressure spring for buffering. This effectively prevents polishing wheel overload and breakage, workpiece out-of-roundness, and local over- or under-polishing defects. Processing stability and surface quality consistency are greatly improved, enhancing the device's flexibility, stability, adaptability, and practicality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0017] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0018] In the attached diagram: Figure 1 A schematic diagram of the structure of the present invention is shown.

[0019] Figure 2 A schematic diagram of the internal structure of the inner circle polishing component of the present invention when it is in the reset state is shown.

[0020] Figure 3 The present invention is shown. Figure 2 Enlarged structural diagram of part A in the middle.

[0021] Figure 4 The present invention is shown. Figure 2 Enlarged structural diagram of part B in the middle.

[0022] Figure 5A schematic diagram of the disassembled drive mechanism of the present invention is shown.

[0023] Figure 6 A schematic diagram of the disassembled adaptation mechanism of the present invention is shown.

[0024] Figure 7 A schematic diagram of the disassembled polishing mechanism of the present invention is shown.

[0025] Figure 8 This diagram shows the internal structure of the polishing wheel of the present invention when it comes into contact with the inner circular surface of a stainless steel workpiece.

[0026] Figure 9 The present invention is shown. Figure 8 Enlarged structural diagram of part C in the middle.

[0027] Figure 10 The present invention is shown. Figure 8 A schematic diagram of the internal structure of the polishing wheel after it reaches the set polishing pressure.

[0028] Figure 11 The present invention is shown. Figure 10 Enlarged structural diagram of part D in the middle.

[0029] List of reference numerals 1. Base assembly; 101. Mounting base; 102. Centering chuck; 103. Chuck motor; 2. Drive mechanism; 201. Feed seat; 2011. Transmission rack; 202. Polishing motor; 203. Polishing spindle; 204. Feed push rod; 3. Polishing mechanism; 301. Holder; 3011. Positioning groove; 302. Polishing wheel; 3021. End polishing part; 3022. Main polishing part; 303. Linkage rod; 304. Transmission gear; 3041. Transmission groove; 4. Adaptation mechanism; 401. Control lever; 4011. Synchronous rotating block; 4012. Positioning rod; 402. Pressure push block; 4021. Pressure top spring; 403. Reference seat; 4031. Monitoring target plate; 404. Synchronous seat; 4041. Distance sensor; 405. Adaptation push rod. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. Based on the described 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.

[0031] Please refer to Figures 1 to 11 Example 1: This invention proposes an inner circle polishing device for stainless steel workpieces, comprising: a base assembly 1, which includes a mounting base 101, a centering chuck 102, and a chuck motor 103. The centering chuck 102 is rotatably connected to the side of the mounting base 101, and the chuck motor 103 is fixedly installed on the outside of the mounting base 101. The chuck motor 103 is connected to the rotating shaft of the centering chuck 102 via a transmission connection. The device also includes an inner circle polishing assembly, which consists of a drive mechanism 2, a polishing mechanism 3, and an adaptation mechanism 4. The drive mechanism 2 includes a feed seat 201, a polishing motor 202, a polishing spindle 203, and a feed push rod 204. The feed seat 201 is inserted into the top of the mounting base 101. The polishing motor 202 is fixedly mounted on the side of the feed seat 201. The polishing spindle 203 is rotatably connected inside the feed seat 201, and the rotating shafts of the polishing spindle 203 and the polishing motor 202 are connected by a drive. The feed push rod 204 is fixedly mounted on the top of the mounting base 101, and one end of the push rod 204 is fixedly mounted on the side of the feed seat 201. The polishing mechanism 3 includes a retainer 301, a polishing wheel 302, and a linkage rod 303. The retainer 301 is inserted into the outside of the polishing spindle 203, and the polishing wheel 302 is rotatably connected to the top of the retainer 301. The linkage rod 303 is rotatably connected inside the retainer 301. The adaptation mechanism 4 includes a control rod 401, which is inserted into the inside of the polishing spindle 203. The adaptation mechanism 4 also includes a pressure push block 402, a reference seat 403, a synchronization seat 404, and an adaptation push rod 405. The pressure push block 402 is inserted into the inside of the control rod 401. The reference seat 403 and the synchronization seat 404 are both inserted into the outside of the control rod 401. The adaptation push rod 405 is fixedly installed inside the feed seat 201. One end of the push rod of the adaptation push rod 405 is fixedly installed on the side of the synchronization seat 404. The polishing mechanism 3 also includes a transmission gear 304, which is rotatably connected inside the polishing spindle 203. The side of the feed seat 201 is provided with a transmission rack 2011, and the transmission rack 2011 and the transmission gear 304 mesh with each other. The linkage rod 303 and the rotating shaft of the polishing wheel 302 are connected by a gear set.

[0032] The retainer 301 is arranged radially along the polishing spindle 203, and the polishing mechanism 3 is provided in four groups. The four groups of polishing mechanisms 3 are evenly arranged circumferentially along the polishing spindle 203, and the polishing spindle 203 and the centering chuck 102 are arranged coaxially.

[0033] The pressure push block 402 has a pressure spring 4021 on its side. The two ends of the pressure spring 4021 abut against the side of the pressure push block 402 and the inside of the control rod 401, respectively. In use, the adapting mechanism 4 can automatically adapt to the size of the inner circle of the stainless steel workpiece, so that the polishing mechanism 3 abuts against the inner circle surface of the stainless steel workpiece, thereby realizing subsequent processing operations. It is convenient and flexible to use. During polishing, after the stainless steel workpiece is fixed on the side of the centering chuck 102, the polishing mechanism 3 is inserted into the inner circle of the stainless steel workpiece through the feed push rod 204. Then, the polishing mechanism 3 can be automatically abutted against the inner circle surface of the stainless steel workpiece by the adapting mechanism 4, and the required polishing pressure is applied. When the inner circle polishing component is in the reset state, the adapting push rod 405 is in the retracted state, so that the polishing mechanism 3 is in the minimum polishing outer diameter, which facilitates the operation of the polishing mechanism 3 extending into the inner circle of the stainless steel workpiece. When the 05 is extended, the pressure push block 402 can be moved by the synchronous seat 404. At this time, since the polishing wheel 302 is not in contact with the inner circle surface of the workpiece, the moving resistance of the retainer 301 is small. Therefore, under the action of the pressure top spring 4021, the pressure push block 402 can drive the control rod 401 to move synchronously when it moves. When the control rod 401 moves, it can drive the reference seat 403 to move. At this time, the distance between the synchronous seat 404 and the reference seat 403 will not change. The retainer 301 has an inclined positioning groove 3011 inside, and the control rod 401 has a positioning rod 4012 outside. The positioning rod 4012 is inserted into the positioning groove 3011. When the control rod 401 moves, the positioning rod 4012 can drive the retainer 301 to extend outward through the positioning groove 3011 until the polishing wheel 302 abuts against the inner circle surface of the workpiece, thereby realizing the function of automatically adapting to the inner circle size of the workpiece, and positioning is fast and convenient.

[0034] The control lever 401 can only move axially within the polishing spindle 203, and the pressure pusher 402 can only move axially within the control lever 401. Both the control lever 401 and the pressure pusher 402 are equipped with synchronous rotating blocks 4011 on their exteriors. The synchronous rotating block 4011 of the control lever 401 extends out of the polishing spindle 203 and is rotatably connected to the interior of the reference seat 403, and the synchronous rotating block 4011 of the pressure pusher 402 extends out of both the control lever 401 and the polishing spindle 203 and is rotatably connected to the interior of the reference seat 403. Inside the synchronizing seat 404, a monitoring target plate 4031 is provided on the side of the reference seat 403, and a distance sensor 4041 is provided on the side of the synchronizing seat 404. The distance sensor 4041 can monitor the distance between the synchronizing seat 404 and the reference seat 403 through the monitoring target plate 4031. In use, when the polishing wheel 302 abuts against the inner circular surface of the workpiece, the adaptive push rod 405 can increase the polishing pressure of the polishing wheel 302 on the inner circular surface of the workpiece as it continues to extend. At this time, due to the polishing wheel 302 The control rod 401 cannot move further outward because it is blocked by the inner surface of the workpiece. Therefore, when the adaptive push rod 405 continues to extend, it can only move independently via the synchronous seat 404, driving the pressure push block 402. This reduces the distance between the reference seat 403 and the synchronous seat 404. Simultaneously, the pressure push block 402 compresses the pressure spring 4021 as it moves independently. The pressure spring 4021 then transmits its elastic force to the polishing wheel 302 through the control rod 401 and the retainer 301, increasing the polishing pressure. The distance sensor 4041 monitors the distance between the synchronous seat 404 and the reference seat 403 in real time via the monitoring target plate 4031. This distance represents the degree of compression of the pressure spring 4021, i.e., the polishing pressure. Therefore, when the distance between the synchronous seat 404 and the reference seat 403 reaches the preset target distance, the adaptive push rod 405 stops extending, facilitating subsequent polishing operations and providing flexibility and convenience.

[0035] The bottom section of the linkage 303 is a regular polygon, and the transmission gear 304 has a transmission groove 3041 inside. The polygonal section of the linkage 303 is inserted into the transmission groove 3041. During use, when polishing the inner surface of a stainless steel workpiece, the polishing motor 202 drives the polishing spindle 203 to rotate. The polishing spindle 203, when rotating, drives the polishing wheel 302 to rotate as well. Simultaneously, the transmission gear 304 rotates under the action of the transmission rack 2011. When the transmission gear 304 rotates, it drives the linkage 303 to rotate through the transmission groove 3041. The linkage 303, when rotating, can... The polishing wheel 302 is driven to rotate by the gear set, and the chuck motor 103 can drive the centering chuck 102 and the workpiece it holds to rotate. Thus, under the combined action of the polishing wheel 302 rotating with the polishing spindle 203, the rotation of the polishing wheel 302 and the rotation of the workpiece, the inner circular surface of the stainless steel workpiece is polished. The polishing is fast and efficient. During the polishing process, if there are tolerance problems such as roundness error, uneven wall thickness or inconsistent local machining allowance of the stainless steel workpiece, the polishing wheel 302 can drive the cage 301 to move inward automatically to avoid them, and the pressure spring 4021 is compressed and buffered to avoid damage to the polishing wheel 302 and loss of roundness of the inner circle. The quality is stable.

[0036] The specific usage and function of this embodiment: In this invention, during polishing, after fixing the stainless steel workpiece to the side of the centering chuck 102, the polishing mechanism 3 is extended into the inner circle of the stainless steel workpiece by the feed push rod 204. Then, the polishing mechanism 3 can automatically contact the inner circle surface of the stainless steel workpiece by the adaptation mechanism 4, and apply the required polishing pressure. When the inner circle polishing assembly is in the reset state, the adaptation push rod 405 is in the retracted state, so that the polishing mechanism 3 is at its minimum polishing outer diameter, facilitating the operation of the polishing mechanism 3 extending into the inner circle of the stainless steel workpiece. When the adaptation push rod 405 extends, it can drive the pressure push block 402 to move through the synchronous seat 404. At this time, since the polishing wheel 302 is not in contact with the inner circle surface of the workpiece, it remains in place. The movement resistance of the frame 301 is small, so under the action of the pressure spring 4021, the pressure push block 402 can drive the control rod 401 to move synchronously when it moves. When the control rod 401 moves, it can drive the reference seat 403 to move. At this time, the distance between the synchronous seat 404 and the reference seat 403 does not change. When the control rod 401 moves, the positioning rod 4012 can drive the retainer 301 to extend outward through the positioning groove 3011 until the polishing wheel 302 abuts against the inner circle surface of the workpiece, thereby realizing the function of automatically adapting to the inner circle size of the workpiece. When the polishing wheel 302 abuts against the inner circle surface of the workpiece, the adaptation push rod 405 can increase the polishing pressure of the polishing wheel 302 on the inner circle surface of the workpiece when it continues to extend. At this time, because the polishing wheel 302 is pressed against the inner circle surface of the workpiece, the polishing wheel 302 is pressed against the inner circle surface of the workpiece. The circular obstruction cannot move further outward, thus the control lever 401 also cannot move further. Subsequently, when the adaptive push rod 405 continues to extend, it can only move independently via the synchronizing seat 404, causing the pressure push block 402 to move alone. This reduces the distance between the reference seat 403 and the synchronizing seat 404. Simultaneously, the pressure push block 402, moving independently, also compresses the pressure spring 4021. The pressure spring 4021 then transmits its elastic force to the polishing wheel 302 through the control lever 401 and the retainer 301, increasing the polishing pressure. Furthermore, the distance sensor 4041 can monitor the distance between the synchronizing seat 404 and the reference seat 403 in real time via the monitoring target plate 4031. The distance between the synchronizing seat 404 and the reference seat 403 is the distance of the pressure spring 4021. The degree of compression, i.e., the polishing pressure, ensures that once the distance between the synchronous seat 404 and the reference seat 403 reaches the preset target distance, the adaptive push rod 405 will no longer extend to facilitate subsequent polishing operations. During the polishing of the inner surface of the stainless steel workpiece, the polishing motor 202 drives the polishing spindle 203 to rotate. The polishing spindle 203, in turn, drives the polishing wheel 302 to rotate. Simultaneously, the transmission gear 304 rotates under the action of the transmission rack 2011. This rotation of the transmission gear 304, through the transmission groove 3041, drives the linkage rod 303 to rotate. The rotation of the linkage rod 303, in turn, drives the polishing wheel 302 to rotate through the gear set. Furthermore, the chuck motor 103 drives the centering chuck 102 and the workpiece it holds to rotate.Thus, under the combined action of the polishing wheel 302 rotating with the polishing spindle 203, the rotation of the polishing wheel 302, and the rotation of the workpiece, the inner cylindrical surface of the stainless steel workpiece is polished quickly and efficiently. Furthermore, during the polishing process, if tolerance issues arise such as roundness errors, uneven wall thickness, or inconsistent local machining allowances in the stainless steel workpiece, the polishing wheel 302 can automatically move the retainer 301 inward to avoid these issues, and the pressure spring 4021 will compress and buffer, preventing damage to the polishing wheel 302 and loss of roundness of the inner surface.

[0037] Example 2: Based on Example 1, the polishing wheel 302 is a split design, consisting of an end polishing part 3021 and a main polishing part 3022. The outer end of the end polishing part 3021 extends beyond the outermost end of the polishing spindle 203. The split design of the polishing wheel 302 allows the end polishing part 3021 to stably extend into the sealed end of the inner circle of the stainless steel workpiece with a single-sided open inner circle for polishing, achieving polishing of the entire inner circle without dead angles. The main polishing part 3022 can achieve rapid polishing of the inner circle of the middle and open parts, further improving the flexibility and adaptability of the device.

Claims

1. An inner circle polishing device for stainless steel workpieces, comprising: The base assembly (1) includes a mounting base (101), a centering chuck (102), and a chuck motor (103). The centering chuck (102) is rotatably connected to the side of the mounting base (101), and the chuck motor (103) is fixedly installed on the outside of the mounting base (101). The chuck motor (103) is connected to the rotating shaft of the centering chuck (102) via a transmission connection. The base assembly is characterized by further including an inner circle polishing assembly, which is composed of a driving mechanism (2), a polishing mechanism (3), and an adaptation mechanism (4). The drive mechanism (2) includes a feed seat (201), a polishing motor (202), a polishing spindle (203), and a feed push rod (204). The feed seat (201) is inserted into the top of the mounting base (101). The polishing motor (202) is fixedly mounted on the side of the feed seat (201). The polishing spindle (203) is rotatably connected inside the feed seat (201), and the rotating shafts of the polishing spindle (203) and the polishing motor (202) are connected by a drive. The feed push rod (204) is fixedly mounted on the top of the mounting base (101), and the feed push rod (204) is driven by a drive rod. One end of the push rod of the rod (204) is fixedly installed on the side of the feed seat (201); the polishing mechanism (3) includes a retainer (301), a polishing wheel (302) and a linkage rod (303). The retainer (301) is inserted into the outside of the polishing spindle (203), and the polishing wheel (302) is rotatably connected to the top of the retainer (301). The linkage rod (303) is rotatably connected to the inside of the retainer (301); the adaptation mechanism (4) includes a control rod (401), which is inserted into the inside of the polishing spindle (203).

2. The inner circle polishing device for stainless steel workpieces according to claim 1, characterized in that, The retainer (301) is arranged radially along the polishing spindle (203), and the polishing mechanism (3) is provided in four groups. The four groups of polishing mechanisms (3) are evenly arranged circumferentially along the polishing spindle (203). The polishing spindle (203) and the centering chuck (102) are arranged coaxially.

3. The inner circle polishing device for stainless steel workpieces according to claim 1, characterized in that, The adaptation mechanism (4) further includes a pressure push block (402), a reference seat (403), a synchronization seat (404), and an adaptation push rod (405). The pressure push block (402) is inserted into the inside of the control rod (401), the reference seat (403) and the synchronization seat (404) are both inserted into the outside of the control rod (401), and the adaptation push rod (405) is fixedly installed inside the feed seat (201). One end of the push rod of the adaptation push rod (405) is fixedly installed on the side of the synchronization seat (404).

4. The inner circle polishing device for stainless steel workpieces according to claim 3, characterized in that, The control rod (401) can only move axially inside the polishing spindle (203), and the pressure push block (402) can only move axially inside the control rod (401). Both the control rod (401) and the pressure push block (402) are provided with a synchronous rotating block (4011). The synchronous rotating block (4011) of the control rod (401) extends out of the polishing spindle (203) and is rotatably connected inside the reference seat (403). The synchronous rotating block (4011) of the pressure push block (402) extends out of the control rod (401) and the polishing spindle (203) and is rotatably connected inside the synchronous seat (404).

5. The inner circle polishing device for stainless steel workpieces according to claim 4, characterized in that, The pressure push block (402) is provided with a pressure top spring (4021) on its side, and the two ends of the pressure top spring (4021) abut against the side of the pressure push block (402) and the inside of the control rod (401) respectively.

6. The inner circle polishing device for stainless steel workpieces according to claim 2, characterized in that, The polishing mechanism (3) also includes a transmission gear (304), which is rotatably connected inside the polishing spindle (203). The side of the feed seat (201) is provided with a transmission rack (2011), and the transmission rack (2011) and the transmission gear (304) mesh and drive each other. The linkage rod (303) and the rotating shaft of the polishing wheel (302) are connected by a gear set.

7. The inner circle polishing device for stainless steel workpieces according to claim 6, characterized in that, The bottom section of the linkage rod (303) is a regular polygon, and the transmission gear (304) has a transmission groove (3041) inside. The rod part of the regular polygon section of the linkage rod (303) is inserted into the transmission groove (3041).

8. The inner circle polishing device for stainless steel machined parts according to claim 1, characterized in that, The cage (301) has an inclined positioning groove (3011) inside, and the control rod (401) has a positioning rod (4012) outside, which is inserted into the positioning groove (3011).

9. The inner circle polishing device for stainless steel workpieces according to claim 1, characterized in that, The polishing wheel (302) is a split design, consisting of an end polishing part (3021) and a main polishing part (3022). The outer end of the end polishing part (3021) extends out of the outermost end of the polishing spindle (203).

10. The inner circle polishing device for stainless steel workpieces according to claim 4, characterized in that, The reference base (403) is provided with a monitoring target plate (4031) on its side, and the synchronization base (404) is provided with a distance sensor (4041) on its side. The distance sensor (4041) can monitor the distance between the synchronization base (404) and the reference base (403) through the monitoring target plate (4031).

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