Polishing device for inner wall and outer wall of metal pipe fitting

Abstract

The invention discloses a metal pipe fitting inner and outer wall polishing device, and relates to the field of metal pipe grinding, the metal pipe fitting inner and outer wall polishing device comprises a tool clamping mechanism and an inner and outer synchronous polishing mechanism, the inner and outer synchronous polishing mechanism comprises a bottom plate, a sliding seat and a polishing plate, the sliding seat is slidably mounted on the bottom plate, and the polishing plate is fixed to the top of the sliding seat; an outer polishing seat and an inner polishing seat are arranged on the polishing plate in a sliding mode, the outer polishing seat and the inner polishing seat both have the freedom degree of moving in the vertical direction, the inner polishing shaft and the outer polishing shaft are rotationally installed on the inner polishing seat and the outer polishing seat correspondingly, and the inner polishing shaft and the outer polishing shaft are connected with an inner polishing head and an outer polishing head correspondingly. The tool clamping mechanism comprises a supporting table and a clamping frame, a tool disc is rotationally installed on the clamping frame, a plurality of outer arc-shaped clamping plates and a plurality of inner arc-shaped clamping plates are arranged on the tool disc, the outer arc-shaped clamping plates and the inner arc-shaped clamping plates both have the freedom degree of moving in the radial direction of the tool disc, and polishing operation of the inner wall and the outer wall of the pipe fitting can be synchronously completed; and the machining period of a single piece is greatly shortened.

Description

Technical Field

[0001] This invention relates to the field of metal pipe polishing, specifically to a device for polishing the inner and outer walls of metal pipe fittings. Background Technology

[0002] Polishing the inner and outer walls of metal pipe fittings is a crucial process for improving their surface finish, assembly compatibility, and corrosion resistance. It is widely used in high-end manufacturing fields such as automotive hydraulic pipe fittings, aerospace conduits, and precision fluid pipe fittings. During polishing, the telescopic movement of the inner polishing mechanism and the radial adjustment movement of the outer polishing mechanism naturally overlap in space. Therefore, avoiding mechanical interference between the mechanisms is a core prerequisite for designing polishing equipment.

[0003] To address this interference problem, the mainstream technical solutions in the industry currently employ a processing mode that separates the internal and external polishing actions. This involves using the same or different equipment to first clamp the outer wall of the metal fitting to complete the internal wall polishing. Once the internal polishing mechanism has fully reset and disengaged from the processing station, the inner wall of the fitting is then clamped again for external wall polishing; or the polishing process is completed in a "outer first, inner last" sequence. While this step-by-step processing method fundamentally avoids motion interference between the internal polishing shaft, external polishing head, and clamping fixture, ensuring the stability of each polishing action and achieving full exposure polishing of both the inner and outer walls, it reveals a core efficiency bottleneck in actual mass production applications, specifically in the following aspects: The core processing efficiency is significantly low: In the step-by-step polishing mode, the internal and external polishing processes are arranged sequentially, resulting in a significant fragmentation of the equipment's effective processing time. The core time consumption of the polishing operation is only the friction processing stage between the polishing head and the pipe wall. However, in the step-by-step mode, non-processing auxiliary actions such as the retraction of the internal polishing mechanism, the positioning adjustment of the external polishing mechanism, and the switching of pipe positions account for a very high proportion. For standard-specification metal pipes processed in batches, the total processing time of step-by-step polishing is approximately twice the theoretical synchronous processing time, which cannot meet the capacity requirements of high-end manufacturing for pipe processing.

[0004] To achieve step-by-step processing, some polishing devices require disassembling the pipe fitting from the clamping mechanism and re-clamping it to adapt to another polishing process. The positioning and alignment operations during the secondary clamping process further extend the processing cycle of a single piece. Even with a step-by-step polishing structure that does not require disassembly, the alternation between the inner and outer polishing mechanisms requires complex program control to complete mechanism reset and refeeding, which adds a significant amount of waiting time for mechanism movement compared to synchronous processing. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a polishing device for the inner and outer walls of metal pipes to solve the shortcomings of the prior art.

[0006] The objective of this invention is achieved through the following technical solution: a polishing device for the inner and outer walls of metal pipe fittings, comprising a tooling clamping mechanism and an inner and outer synchronous polishing mechanism. The inner and outer synchronous polishing mechanism includes a base plate, a slide block, a polishing plate, an inner polishing shaft, and an outer polishing shaft. The slide block is slidably mounted on the base plate, and the polishing plate is fixed to the top of the slide block. An outer polishing seat and an inner polishing seat are slidably disposed on the polishing plate, both having a degree of freedom to move in the vertical direction. The inner polishing shaft and the outer polishing shaft are rotatably mounted on the inner and outer polishing seats, respectively. An inner polishing head and an outer polishing head are respectively connected to the inner and outer polishing shafts. The tooling clamping mechanism includes a support platform and a clamping frame. The support platform is located between the base plate and the clamping frame. A tooling disk is rotatably mounted on the clamping frame. An inner ring clamping assembly and an outer ring clamping assembly are provided on the tooling disk. The outer ring clamping assembly includes multiple outer arc-shaped clamping plates, which are arranged around the circumference of the tooling disk. The inner ring clamping assembly includes multiple inner arc-shaped clamping plates, which are arranged around the circumference of the tooling disk. The inner arc-shaped clamping plates and the outer arc-shaped clamping plates are staggered along the circumference of the tooling disk. Both the outer arc-shaped clamping plates and the inner arc-shaped clamping plates have the freedom to move radially along the tooling disk.

[0007] Furthermore, a first mounting groove is provided on the polishing plate, and a first lead screw is vertically arranged in the first mounting groove. The first lead screw is rotatably connected to the polishing plate. The outer polishing seat is threaded onto the first lead screw. A first motor is installed on the top of the polishing plate. The output shaft of the first motor is driven and connected to the first lead screw. An outer polishing motor is installed on the outer polishing seat. The output shaft of the outer polishing motor is driven and connected to the outer polishing shaft.

[0008] Furthermore, a second mounting groove is provided on the polishing plate, and a second lead screw is vertically arranged in the second mounting groove. The second lead screw is rotatably connected to the polishing plate. The inner polishing seat is threaded onto the second lead screw. A second motor is installed at the bottom of the polishing plate. The output shaft of the second motor is driven and connected to the second lead screw. An inner polishing motor is installed on the inner polishing seat. The output shaft of the inner polishing motor is driven and connected to the inner polishing shaft.

[0009] Furthermore, the tooling tray is provided with a driving cavity, and a first driving disk is rotatably disposed in the driving cavity. The end face of the first driving disk near the support table is provided with a first planar thread, and a first face tooth block is engaged on the first planar thread. Each inner arc-shaped clamping plate is provided with a first face tooth block. The end face of the tooling tray near the support table is provided with a first guide groove on the end face where the inner arc-shaped clamping plate is disposed. The first guide groove is connected to the driving cavity. The inner arc-shaped clamping plate is slidably adapted to the first guide groove, and one end of the inner arc-shaped clamping plate is fixedly connected to the first face tooth block.

[0010] Furthermore, a first worm gear is mounted on the first drive disk, the first worm gear meshes with a first worm, the first worm is rotatably connected to a tooling disk, a first tooling motor is mounted on the side wall of the tooling disk, and the output shaft of the first tooling motor is drively connected to the first worm.

[0011] Furthermore, a second driving disk is rotatably disposed within the driving cavity. The first driving disk and the second driving disk are spaced apart along the axial direction of the tooling disk. A second planar thread is provided on the end face of the second driving disk near the support platform. A second toothed block is engaged on the second planar thread. Each of the outer arc-shaped clamping plates is equipped with a second toothed block. A second guide groove is opened on the end face of the tooling disk near the support platform on the end face where the outer arc-shaped clamping plate is disposed. The second guide groove communicates with the driving cavity. The outer arc-shaped clamping plate is slidably adapted to the second guide groove. The outer arc-shaped clamping plate is connected to an L-shaped connecting rod. The L-shaped connecting rod passes around the first driving disk and connects to the second toothed block.

[0012] Furthermore, a second worm gear is mounted on the second drive disk, the second worm gear meshes with a second worm, the second worm is rotatably connected to a tooling disk, a second tooling motor is mounted on the side wall of the tooling disk, and the output shaft of the second tooling motor is drively connected to the second worm.

[0013] Furthermore, the clamping frame includes a fixed base, a support cylinder, and a clamping plate. The support cylinder is vertically mounted on the fixed base, and the telescopic shaft of the support cylinder is connected to the clamping plate. The tooling disc is rotatably mounted on the clamping plate.

[0014] Furthermore, a drive motor is mounted on the clamping plate, the output shaft of the drive motor is connected to a drive gear, and a driven gear is fitted on the tooling plate, the driven gear meshing with the drive gear.

[0015] Furthermore, a slide rail is fixed on the base plate, a slide rail slider is slidably mounted on the slide rail, a slide block is mounted on the slide rail slider, and a push cylinder is horizontally mounted on the base plate, with the telescopic shaft of the push cylinder connected to the slide block.

[0016] The beneficial effects of this invention are: 1. The metal pipe fitting is clamped by both an inner and outer arc-shaped clamping plate, providing strong clamping strength and ensuring that the metal pipe fitting will not shift during synchronous internal and external polishing. The tooling disc drives the metal pipe fitting to rotate around its own axis. The inner and outer polishing heads contact the inner and outer walls of the metal pipe fitting respectively. The sliding block drives the inner and outer polishing heads to move along the axial direction of the metal pipe fitting, thereby completing the comprehensive polishing of the inner and outer walls of the metal pipe fitting. The polishing of the inner and outer walls of the pipe fitting can be completed simultaneously, optimizing the traditional serial processing mode into parallel operation, significantly shortening the processing cycle of a single piece. Compared with the existing technology where the total processing time of step-by-step polishing is twice that of synchronous processing, this device effectively reduces non-processing auxiliary time such as the retraction of the inner polishing mechanism and the adjustment of the outer polishing mechanism, improving the batch processing efficiency by more than 50%.

[0017] 2. When the polishing position of the metal pipe is close to the tooling position, first clamp the metal pipe with the outer arc clamping plate and release the metal pipe with the inner arc clamping plate. Polish the tooling area on the inner wall of the metal pipe with the inner polishing head. Then clamp the metal pipe with the inner arc clamping plate and release the metal pipe with the outer arc clamping plate. Polish the tooling area on the outer wall of the metal pipe with the outer polishing head. This avoids the problem of mutual interference caused by polishing the inner and outer sides at the same time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a metal pipe polishing device according to the present invention. Figure 1 ; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the structure of a metal pipe polishing device according to the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the structure of a metal pipe polishing device according to the present invention. Figure 3 ; Figure 5 This is a schematic diagram of the tooling disc in the inner and outer wall polishing device for a metal pipe fitting according to the present invention. Figure 6 for Figure 5 Sectional view along the BB direction; Figure 7 for Figure 5 C-axis sectional view; In the diagram, 1-base plate, 2-slide block, 3-polishing plate, 4-inner polishing shaft, 5-outer polishing shaft, 6-outer polishing seat, 7-inner polishing seat, 8-inner polishing head, 9-outer polishing head, 10-support platform, 11-clamping frame, 12-tooling plate, 13-outer arc-shaped clamping plate, 14-inner arc-shaped clamping plate, 15-first mounting slot, 16-first lead screw, 17-first motor, 18-outer polishing motor, 19-second mounting slot, 20-second lead screw, 21-second motor, 22-inner polishing motor, 23-drive cavity, 24-first drive plate, 25-first planar thread, 26-... 27-First face toothed block, 28-First guide groove, 29-First worm gear, 30-First tooling motor, 31-Second drive disc, 32-Second planar thread, 33-Second face toothed block, 34-Second guide groove, 35-L-shaped connecting rod, 36-Second worm gear, 37-Second worm, 38-Second tooling motor, 39-Fixed base, 40-Support cylinder, 41-Clamping plate, 42-Drive motor, 43-Driving gear, 44-Driven gear, 45-Slide rail, 46-Push cylinder, 47-Slide base plate, 48-Fine adjustment cylinder, 49-Slide top plate. Detailed Implementation

[0019] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0020] Example 1 like Figures 1 to 7As shown, a metal pipe fitting inner and outer wall polishing device includes a tooling clamping mechanism and an inner and outer synchronous polishing mechanism. The inner and outer synchronous polishing mechanism includes a base plate 1, a slide 2, a polishing plate 3, an inner polishing shaft 4, and an outer polishing shaft 5. The slide 2 is slidably mounted on the base plate 1, and the polishing plate 3 is fixed to the top of the slide 2. An outer polishing seat 6 and an inner polishing seat 7 are slidably disposed on the polishing plate 3. Both the outer polishing seat 6 and the inner polishing seat 7 have a degree of freedom to move in the vertical direction. The inner polishing shaft 4 and the outer polishing shaft 5 are respectively rotatably mounted on the inner polishing seat 7 and the outer polishing seat 6. An inner polishing head 8 and an outer polishing head 9 are respectively connected to the inner polishing shaft 4 and the outer polishing shaft 5. The tooling clamping mechanism includes a support platform 10 and a clamping frame 11. The support platform 10 is located between the base plate 1 and the clamping frame 11. A tooling tray 12 is rotatably mounted on the clamping frame 11. The tooling tray 12 is equipped with an inner ring clamping assembly and an outer ring clamping assembly. The outer ring clamping assembly includes multiple outer arc-shaped clamping plates 13 arranged around the circumference of the tooling tray 12. The inner ring clamping assembly includes multiple inner arc-shaped clamping plates 14 arranged around the circumference of the tooling tray 12. The inner arc-shaped clamping plates 14 and outer arc-shaped clamping plates 13 are staggered along the circumference of the tooling tray 12. Both the outer arc-shaped clamping plates 13 and inner arc-shaped clamping plates 14 have the freedom to move radially along the tooling tray 12. Two sets of support rollers are mounted on the support platform 10. The metal pipe to be polished is placed between the two sets of support rollers, which support the metal pipe. Then, the metal pipe fitting is clamped by a tooling clamping mechanism. The inner arc-shaped clamping plate 14 is pressed against the inner wall of the metal pipe fitting, and the outer arc-shaped clamping plate 13 is pressed against the outer wall of the metal pipe fitting. Thus, the tooling of the metal pipe fitting is completed by the combined action of the inner arc-shaped clamping plate 14 and the outer arc-shaped clamping plate 13. It has strong clamping strength and can ensure that the metal pipe fitting will not be displaced under synchronous internal and external polishing. Then, the inner and outer walls of the metal pipe fitting are synchronously polished by the internal and external synchronous polishing mechanism. Specifically, the movement of the inner polishing seat 7 and the outer polishing seat 6 first causes the inner polishing head 8 to contact the inner wall of the metal pipe fitting and the outer polishing head 9 to contact the outer wall of the metal pipe fitting. Then, the inner polishing shaft 4 drives the inner polishing head 8 to rotate, and the outer polishing shaft 5 drives the outer polishing head 9 to rotate. The metal tube is rotated, causing the inner polishing head 8 to cover the inner circumference of the metal tube and the outer polishing head 9 to cover the outer circumference of the metal tube. After a period of time, the slide 2 drives the inner polishing head 8 and the outer polishing head 9 to move along the axial direction of the metal tube. Each movement distance is less than the axial length of the inner polishing head 8, ensuring full coverage polishing of the inner and outer walls of the metal tube. Thus, the rotation of the metal tube and the linear feed of the polishing head achieve synchronous polishing of the inner and outer walls, optimizing the traditional serial processing mode into parallel operation, significantly shortening the processing cycle of a single piece. Compared with the existing technology where the total processing time of step-by-step polishing is twice that of synchronous processing, this device effectively reduces non-processing auxiliary time such as the retraction of the inner polishing mechanism and the adjustment of the outer polishing mechanism, improving batch processing efficiency by more than 50%.When the polishing position of the metal pipe is close to the tooling position, that is, the inner polishing head 8 is close to the inner arc-shaped clamping plate 14 and the outer polishing head 9 is close to the outer arc-shaped clamping plate 13, the metal pipe is first clamped by the outer arc-shaped clamping plate 13 and the inner arc-shaped clamping plate 14 is disengaged from the metal pipe, so that the inner wall of the metal pipe is fully exposed. The inner polishing head 8 completes the polishing of the tooling area of ​​the inner wall of the metal pipe. At the same time, the outer polishing seat 6 drives the outer polishing head 9 to disengage from the outer wall of the metal pipe, so that the outer polishing head 9 moves to the outside of the outer arc-shaped clamping plate 13, so that the outer polishing head 9 can be polished. When the head 9 is fed, it will not interfere with the outer arc-shaped clamping plate 13. Then, the metal pipe is clamped by the inner arc-shaped clamping plate 14, and the outer arc-shaped clamping plate 9 is released from the metal pipe. The outer polishing head 9 completes the polishing of the tooling area on the outer wall of the metal pipe. At the same time, the inner polishing seat 7 drives the inner polishing head 8 to be released from the outer wall of the metal pipe, so that the inner polishing head 8 moves to the annular area formed by multiple inner arc-shaped clamping plates 14. This ensures that the inner polishing head 8 will not interfere with the inner arc-shaped clamping plate 14 when it is fed, and avoids the problem of mutual interference caused by polishing inside and outside at the same time.

[0021] Example 2 Based on Example 1, such as Figures 1 to 4 As shown, a drive motor 42 is mounted on the clamping plate 41. The output shaft of the drive motor 42 is connected to a drive gear 43. A driven gear 44 is mounted on the tooling plate 12. The driven gear 44 meshes with the drive gear 43. The drive motor 42 drives the tooling plate 12 to rotate through the meshing of the drive gear 43 and the driven gear 44, so that the tooling plate 12 clamps the metal pipe and rotates, thereby realizing the polishing action of the circumferential area of ​​the metal pipe.

[0022] Furthermore, a slide rail 45 is fixed on the base plate 1, and a slide rail slider is slidably mounted on the slide rail 45. The slide seat 2 is mounted on the slide rail slider. A push cylinder 46 is horizontally mounted on the base plate 1. The telescopic shaft of the push cylinder 46 is connected to the slide seat 2. By pushing the cylinder 46, the slide seat 2 is moved on the base plate 1, which drives the inner polishing head 8 and the outer polishing head 9 to feed along the axial direction of the metal tube. In conjunction with the rotation of the metal tube, the inner and outer walls are fully polished.

[0023] Example 3 When the inner polishing head 8 and the outer polishing head 9 are axially fed, since both the inner polishing head 8 and the outer polishing head 9 are in close contact with the metal pipe, there is a large friction between the inner polishing head 8 and the metal pipe, and between the outer polishing head 9 and the metal pipe. This causes feeding obstruction on the one hand, and easily scratches the inner and outer walls of the metal pipe on the other. Therefore, based on Embodiment 2, as follows... Figures 1 to 4As shown, the slide 2 includes a slide base plate 47, a fine-tuning cylinder 48, and a slide top plate 49. The slide base plate 47 is mounted on the slide rail slider, and the fine-tuning cylinder 48 is vertically mounted on the slide base plate 47. The telescopic shaft of the fine-tuning cylinder 48 is connected to the slide top plate 49. When the slide 2 moves to feed the inner polishing head 8 and the outer polishing head 9, the fine-tuning cylinder 48 drives the slide top plate 49 to move upward. The polishing plate 3 is mounted on the slide top plate 49, thereby driving the polishing plate 3 to move upward. Since the inner polishing head 8 contacts the inner bottom wall of the metal pipe and the outer polishing head contacts the outer top wall of the metal pipe, after the polishing plate 3 moves upward, the inner polishing head 8 disengages from the inner wall of the metal pipe and the outer polishing head disengages from the outer wall of the metal pipe. This ensures that no friction occurs between the inner polishing head 8 and the metal pipe, or between the outer polishing head 9 and the metal pipe during feeding, thus avoiding frictional damage to the metal pipe.

[0024] Example 4 Based on Example 3, such as Figures 1 to 4 As shown, a first mounting groove 15 is provided on the polishing plate 3, and a first lead screw 16 is vertically arranged in the first mounting groove 15. The first lead screw 16 is rotatably connected to the polishing plate 3. An outer polishing seat 6 is threadedly fitted onto the first lead screw 16. A first motor 17 is installed on the top of the polishing plate 3. The output shaft of the first motor 17 is driven to connect to the first lead screw 16. An outer polishing motor 18 is installed on the outer polishing seat 6. The output shaft of the outer polishing motor 18 is driven to connect to the outer polishing shaft 5. The outer polishing motor 18 drives the outer polishing shaft 5 to rotate, and the outer polishing shaft 5 drives the outer polishing head 9 to rotate. The outer polishing head 9 can complete the outer wall polishing by contacting the outer wall of the metal pipe. The first motor 17 drives the first lead screw 16 to rotate, so that the outer polishing seat 6 moves linearly along the axial direction of the first lead screw 16, so that the outer polishing seat 6 drives the outer polishing head 9 to move up and down. The position of the outer polishing head 9 can be adjusted so that the outer polishing head 9 contacts the outer top wall of the metal pipe for polishing.

[0025] Furthermore, a second mounting groove 19 is provided on the polishing plate 3, and a second lead screw 20 is vertically installed in the second mounting groove 19. The second lead screw 20 is rotatably connected to the polishing plate 3. The inner polishing seat 7 is threaded onto the second lead screw 20. A second motor 21 is installed at the bottom of the polishing plate 3. The output shaft of the second motor 21 is driven and connected to the second lead screw 20. An inner polishing motor 22 is installed on the inner polishing seat 7. The output shaft of the inner polishing motor 22 is driven and connected to the inner polishing shaft 4. The inner polishing motor 22 drives the inner polishing shaft 4 to rotate, and the inner polishing shaft 4 drives the inner polishing head 8 to rotate, so that the inner polishing head 8 contacts the inner wall of the metal pipe to complete the inner wall polishing. The second motor 21 is located below the top plate 49 of the slide seat. The second motor 21 drives the second lead screw 20 to rotate, so that the inner polishing seat 7 moves linearly along the axial direction of the second lead screw 20, so that the inner polishing seat 7 drives the inner polishing head 8 to move up and down. The position of the inner polishing head 8 is adjusted so that the inner polishing head 8 contacts the inner bottom wall of the metal pipe to perform the polishing operation.

[0026] Example 5 Based on Example 4, such as Figures 1 to 7 As shown, the tooling disc 12 has a drive cavity 23, and a first drive disc 24 is rotatably mounted in the drive cavity 23. The end face of the first drive disc 24 near the support table 10 has a first planar thread 25, and a first face tooth block 26 meshes on the first planar thread 25. Each inner arc-shaped clamping plate 14 is equipped with a first face tooth block 26. The end face of the tooling disc 12 near the support table 10 has a first guide groove 27 on the end face where the inner arc-shaped clamping plate 14 is located. The first guide groove 27 connects to the drive cavity 23. The inner arc-shaped clamping plate 14 slides to fit the first guide groove 27, and one end of the inner arc-shaped clamping plate 14 is fixedly connected to the first face tooth block 26. A first worm gear 28 is mounted on the first drive disc 24. A worm gear 28 meshes with a first worm 29, which is rotatably connected to a tooling disk 12. A first tooling motor 30 is mounted on the side wall of the tooling disk 12. The output shaft of the first tooling motor 30 is connected to the first worm 29. The first tooling motor 30 drives the first worm 29 to rotate. The first worm 29, through meshing with the first worm gear 28, drives the first drive disk 24 to rotate. Under the meshing action of the first planar thread 25 and the first face tooth block 26, and under the guidance of the first guide groove 27, the inner arc-shaped clamping plate 14 moves radially along the tooling disk 12. Multiple inner arc-shaped clamping plates 14 move synchronously, and the tooling operation is completed by contacting the inner wall of the metal pipe fitting through multiple inner arc-shaped clamping plates 14.

[0027] Furthermore, a second drive disk 31 is rotatably disposed within the drive cavity 23. The first drive disk 24 and the second drive disk 31 are spaced apart along the axial direction of the tooling disk 12. The end face of the second drive disk 31 near the support table 10 is provided with a second planar thread 32, and a second face tooth block 33 meshes on the second planar thread 32. Each outer arc-shaped clamping plate 13 is provided with a second face tooth block 33. The end face of the tooling disk 12 near the support table 10 is provided with a second guide groove 34 on the end face where the outer arc-shaped clamping plate 13 is disposed. The second guide groove 34 communicates with the drive cavity 33, and the outer arc-shaped clamping plate 13 slides to adapt to the drive cavity 33. An L-shaped connecting rod 35 is connected to the outer arc-shaped clamping plate 13 in the second guide groove 34. The L-shaped connecting rod 35 passes around the first drive disk 24 and connects to the second face tooth block 33. A second worm gear 36 is mounted on the second drive disk 31. The second worm gear 36 meshes with a second worm 37. The second worm 37 is rotatably connected to the tooling disk 12. A second tooling motor 38 is installed on the side wall of the tooling disk 12. The output shaft of the second tooling motor 38 is connected to the second worm 37. The second tooling motor 38 drives the second worm 37 to rotate. The second worm 37 drives the second drive disk 31 to rotate through meshing with the second worm gear 36. The second drive disc 31 causes the second planar thread 32 to rotate. Under the meshing action of the second planar screw 32 and the second face tooth block 33, and under the guidance of the second guide groove 34, the second face tooth block 33 drives the outer arc-shaped clamping plate 13 to move radially along the tooling disc 12 via the L-shaped connecting rod 35. Multiple outer arc-shaped clamping plates 13 move synchronously, causing them to contact the inner wall of the metal pipe to complete the tooling operation. The L-shaped connecting rod 35 avoids the influence of the first drive disc 24. When polishing reaches the tooling position, the first tooling motor 30 drives the first worm gear 29 to rotate in the opposite direction. The inner arc-shaped clamping plate 14 is disengaged from the inner wall of the metal pipe. At this time, the inner polishing head 8 can move between the inner ring of the metal pipe and the inner arc-shaped clamping plate 14, thus completing the grinding of the clamping area of ​​the inner wall of the metal pipe. After the grinding of this area is completed, the inner polishing head 8 is withdrawn, and the inner arc-shaped clamping plate 14 resets to clamp the metal pipe. Then, the second tooling motor 38 drives the second worm gear 37 to rotate in the opposite direction, causing the outer arc-shaped clamping plate 13 to disengage from the outer wall of the metal pipe. At this time, the outer polishing head 9 can move between the outer ring of the metal pipe and the outer arc-shaped clamping plate 13, thus completing the grinding of the clamping area of ​​the outer wall of the metal pipe.

[0028] Example 6 Based on Example 5, such as Figures 1 to 4As shown, the clamping frame 11 includes a fixed base 39, a support cylinder 40, and a clamping plate 41. The support cylinder 40 is vertically mounted on the fixed base 39, and the telescopic shaft of the support cylinder 40 is connected to the clamping plate 41. The tooling plate 12 is rotatably mounted on the clamping plate 41. The initial positioning of the metal pipe is completed by two sets of support rollers. At this time, it is only necessary to adjust the position of the tooling plate 12 in the vertical direction. The height position of the clamping plate 41 is adjusted according to the diameter of the metal pipe so that the tooling plate 12 is coaxial with the metal pipe. Then the clamping tooling of the metal pipe is used.

Claims

1. A polishing device for the inner and outer walls of metal pipe fittings, characterized in that, The device includes a tooling clamping mechanism and an internal and external synchronous polishing mechanism. The internal and external synchronous polishing mechanism includes a base plate (1), a slide (2), a polishing plate (3), an inner polishing shaft (4), and an outer polishing shaft (5). The slide (2) is slidably mounted on the base plate (1), and the polishing plate (3) is fixed on the top of the slide (2). An outer polishing seat (6) and an inner polishing seat (7) are slidably mounted on the polishing plate (3). Both the outer polishing seat (6) and the inner polishing seat (7) have a degree of freedom to move in the vertical direction. The inner polishing shaft (4) and the outer polishing shaft (5) are rotatably mounted on the inner polishing seat (7) and the outer polishing seat (6), respectively. An inner polishing head (8) and an outer polishing head (9) are respectively connected to the inner polishing shaft (4) and the outer polishing shaft (5). The tooling clamping mechanism includes a support platform (10) and a clamping frame (11). The support platform (10) is located between the base plate (1) and the clamping frame (11). A tooling plate (12) is rotatably mounted on the clamping frame (11). An inner ring clamping assembly and an outer ring clamping assembly are provided on the tooling plate (12). The outer ring clamping assembly includes multiple outer arc-shaped clamping plates (13). The multiple outer arc-shaped clamping plates (13) are arranged around the circumference of the tooling plate (12). The inner ring clamping assembly includes multiple inner arc-shaped clamping plates (14). The multiple inner arc-shaped clamping plates (14) are arranged around the circumference of the tooling plate (12). The inner arc-shaped clamping plates (14) and the outer arc-shaped clamping plates (13) are staggered along the circumference of the tooling plate (12). Both the outer arc-shaped clamping plates (13) and the inner arc-shaped clamping plates (14) have the freedom to move radially along the tooling plate (12).

2. The metal pipe polishing device according to claim 1, characterized in that, The polishing plate (3) is provided with a first mounting groove (15), and a first lead screw (16) is vertically arranged in the first mounting groove (15). The first lead screw (16) is rotatably connected to the polishing plate (3). The outer polishing seat (6) is threaded onto the first lead screw (16). A first motor (17) is installed on the top of the polishing plate (3). The output shaft of the first motor (17) is connected to the first lead screw (16). An outer polishing motor (18) is installed on the outer polishing seat (6). The output shaft of the outer polishing motor (18) is connected to the outer polishing shaft (5).

3. The metal pipe fitting inner and outer wall polishing device according to claim 2, characterized in that, The polishing plate (3) is provided with a second mounting groove (19), and a second lead screw (20) is vertically arranged in the second mounting groove (19). The second lead screw (20) is rotatably connected to the polishing plate (3). The inner polishing seat (7) is threaded onto the second lead screw (20). A second motor (21) is installed at the bottom of the polishing plate (3). The output shaft of the second motor (21) is connected to the second lead screw (20). An inner polishing motor (22) is installed on the inner polishing seat (7). The output shaft of the inner polishing motor (22) is connected to the inner polishing shaft (4).

4. The metal pipe polishing device according to claim 1, characterized in that, The tooling plate (12) is provided with a drive cavity (23), and a first drive plate (24) is rotatably arranged in the drive cavity (23). The end face of the first drive plate (24) near the support table (10) is provided with a first planar thread (25). A first face tooth block (26) is engaged on the first planar thread (25). Each inner arc-shaped clamping plate (14) is provided with a first face tooth block (26). The end face of the tooling plate (12) near the support table (10) is provided with a first guide groove (27). The first guide groove (27) is connected to the drive cavity (23). The inner arc-shaped clamping plate (14) is slidably adapted to the first guide groove (27), and one end of the inner arc-shaped clamping plate (14) is fixedly connected to the first face tooth block (26).

5. The metal pipe fitting inner and outer wall polishing device according to claim 4, characterized in that, The first drive disk (24) is fitted with a first worm gear (28), the first worm gear (28) meshes with a first worm (29), the first worm (29) is rotatably connected to the tooling disk (12), the side wall of the tooling disk (12) is equipped with a first tooling motor (30), and the output shaft of the first tooling motor (30) is connected to the first worm (29).

6. The metal pipe fitting inner and outer wall polishing device according to claim 4, characterized in that, The second drive disk (31) is rotatably disposed in the drive cavity (23). The first drive disk (24) and the second drive disk (31) are spaced apart along the axial direction of the tooling disk (12). The end face of the second drive disk (31) near the support table (10) is provided with a second planar thread (32). A second face tooth block (33) meshes on the second planar thread (32). Each of the outer arc-shaped clamping plates (13) is provided with a second face tooth block (33). The end face of the tooling disk (12) near the support table (10) is provided with a second guide groove (34) on the end face where the outer arc-shaped clamping plate (13) is disposed. The second guide groove (34) communicates with the drive cavity (23). The outer arc-shaped clamping plate (13) slides and adapts to the second guide groove (34). The outer arc-shaped clamping plate (13) is connected to an L-shaped connecting rod (35). The L-shaped connecting rod (35) passes around the first drive disk (24) and connects to the second face tooth block (33).

7. The metal pipe fitting inner and outer wall polishing device according to claim 6, characterized in that, The second drive disk (31) is fitted with a second worm gear (36), the second worm gear (36) meshes with a second worm (37), the second worm (37) is rotatably connected to the tooling disk (12), the side wall of the tooling disk (12) is equipped with a second tooling motor (38), and the output shaft of the second tooling motor (38) is connected to the second worm (37) via a transmission.

8. The polishing device for the inner and outer walls of a metal pipe according to claim 1, characterized in that, The clamping frame (11) includes a fixed base (39), a support cylinder (40) and a clamping plate (41). The support cylinder (40) is vertically mounted on the fixed base (39), and the telescopic shaft of the support cylinder (40) is connected to the clamping plate (41). The tooling plate (12) is rotatably mounted on the clamping plate (41).

9. The polishing device for the inner and outer walls of a metal pipe according to claim 8, characterized in that, A drive motor (42) is installed on the clamping plate (41), and the output shaft of the drive motor (42) is connected to a drive gear (43). A driven gear (44) is fitted on the tooling plate (12), and the driven gear (44) meshes with the drive gear (43).

10. The polishing device for the inner and outer walls of a metal pipe according to claim 1, characterized in that, A slide rail (45) is fixed on the base plate (1), and a slide rail slider is slidably mounted on the slide rail (45). The slide seat (2) is mounted on the slide rail slider. A push cylinder (46) is horizontally mounted on the base plate (1), and the telescopic shaft of the push cylinder (46) is connected to the slide seat (2).

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