Inner wall polishing device for hardware pipe fitting machining

Abstract

The invention belongs to the technical field of pipe fitting inner wall polishing, and particularly relates to an inner wall polishing device for hardware pipe fitting machining, which comprises a mounting frame, two guide rails, a movable frame, a connecting frame, a control module, a fixed frame, a sliding frame, an electric cylinder and the like, the two guide rails are symmetrically mounted on the mounting frame, and the movable frame is slidably arranged between the two guide rails; a control module is installed on the lower portion of the connecting frame, a fixed frame is installed on the left side of the upper portion of the connecting frame, a sliding frame is fixedly arranged on the right side of the movable frame, and an electric cylinder is installed on the mounting frame. The electric cylinder drives the limiting frame to ascend and descend, the height position of the polishing rod can be accurately adjusted, it is ensured that the axis of the polishing rod is aligned with the centers of inner holes of pipe fittings with different diameters, and the polishing rods with different inner diameters can be rapidly replaced under the condition that other parts are not disassembled by combining sliding sleeving connection of the polishing rod and the prismatic rod and a non-circular section transmission structure; and the universality, the remodeling efficiency and the operation convenience of the equipment are obviously improved.

Description

Technical Field

[0001] This invention belongs to the field of pipe inner wall grinding technology, and particularly relates to an inner wall grinding device for processing hardware pipes. Background Technology

[0002] With the development of industrial manufacturing technology, the application of hardware pipe fittings is becoming increasingly widespread, and the requirements for the quality of their inner walls are also increasing. Inner wall grinding is one of the key processes to ensure the smoothness of the pipe fitting's interior, remove burrs and oxide layers, and meet the requirements for assembly and fluid flow performance.

[0003] However, existing pipe fitting inner wall grinding devices generally have poor adaptability. When dealing with pipe fittings of different diameters, it is necessary to replace the grinding components and perform complex mechanical calibration, resulting in long changeover cycles, low equipment utilization, and limited production efficiency. This makes it difficult to meet the process requirements for efficient and agile switching in flexible manufacturing scenarios with multiple varieties and small batches.

[0004] Therefore, there is a particular need for an internal wall grinding device for processing hardware pipe fittings to solve the above problems. Summary of the Invention

[0005] In order to overcome the shortcomings of existing pipe fitting inner wall grinding devices, which have long changeover cycles and cannot meet the requirements of flexible production for rapid switching, this invention provides an inner wall grinding device for hardware pipe fitting processing.

[0006] This invention is achieved through the following technical means: an inner wall grinding device for processing hardware pipe fittings, comprising a mounting frame, guide rails, a movable frame, a connecting frame, a control module, a fixed frame, a sliding frame, an electric cylinder, a limit frame, a fixed block, a rotating frame, a prismatic rod, and a grinding rod. Two guide rails are symmetrically mounted on the mounting frame, and a movable frame is slidably arranged between the two guide rails. A connecting frame is mounted on the mounting frame, and a control module is mounted on the lower part of the connecting frame. A fixed frame is mounted on the upper left side of the connecting frame, and a sliding frame is fixedly mounted on the right side of the movable frame. An electric cylinder is mounted on the mounting frame and is electrically connected to the control module. A limit frame is mounted on the end of the piston rod of the electric cylinder, and the right end of the limit frame forms a sliding fit with the mounting frame. A fixed block is fixedly connected to the left end of the limit frame, and the fixed block forms a sliding fit with the fixed frame. A rotating frame is rotatably arranged on the right end of the limit frame, and a prismatic rod is fixedly passed through the rotating frame. A grinding rod is slidably sleeved on the prismatic rod.

[0007] Furthermore, it also includes a limiting block. Two limiting grooves are symmetrically opened on the lower part of the limiting frame, and a limiting block is slidably arranged between the two limiting grooves. The limiting block and the sliding frame form a sliding engagement. The right end of the grinding rod passes horizontally through the limiting block and forms a rotational engagement with the limiting block.

[0008] Furthermore, the limiting block is initially located at the rightmost end of the two limiting grooves, the moving frame is located at the rightmost position of the moving stroke, and the grinding rod is located at the rightmost position of the grinding stroke.

[0009] Furthermore, it also includes a fixed plate, a drive motor, a second set of pulleys, a screw, a support block, a lifting frame, and V-blocks. The drive motor is installed on the lower right side of the mounting frame and is electrically connected to the control module. A screw is rotatably mounted on the lower left side of the mounting frame. A second set of pulleys is installed between the output shaft of the drive motor and the lower end of the screw. A support block is installed on the middle left side of the mounting frame. The upper end of the screw passes vertically through the support block and forms a rotational engagement with the support block. A lifting frame is threaded through the screw. Two V-blocks are symmetrically mounted on the lifting frame. A fixed plate is fixed to the upper left side of the mounting frame. Two other V-blocks are symmetrically mounted on the bottom of the fixed plate. The two upper V-blocks are arranged in an inverted position, and the two lower V-blocks are arranged upright. The four V-blocks together constitute a self-centering clamping structure.

[0010] Furthermore, it also includes guide frames and sliders. Two guide frames are installed on the support frame, and sliders are slidably mounted on the guide frames. The sliders are fixedly connected to the lifting frame.

[0011] Furthermore, it also includes a servo motor, a lead screw, a connecting block, a first gear, a rotating plate, a second gear, a swing plate, and a first pulley set. The servo motor is mounted on the mounting frame and is electrically connected to the control module. A lead screw is fixedly connected to the output shaft of the servo motor, and a connecting block is threaded through the lead screw. The connecting block is fixedly connected to the sliding frame. A rotating plate is rotatably mounted on the right side of the middle of the mounting frame. The right end of the lead screw passes horizontally through the rotating plate and is fixedly connected to a first gear. A second gear is rotatably mounted on the right side of the rotating plate. The first gear and the second gear mesh, and their axial thicknesses are equal. A swing plate is rotatably mounted between the second gear and the right end of the prismatic rod. A first pulley set is mounted between the prismatic rod and the second gear.

[0012] Furthermore, it also includes a connector and a chip collection box. The connector is fixedly installed at the right end of the prismatic rod, and an air chamber is opened inside the prismatic rod. The connector is connected to the air chamber. Two exhaust ports are symmetrically opened at the left end of the grinding rod. The left end of the air chamber is completely open. A chip collection box is installed on the left side of the mounting bracket.

[0013] Furthermore, it also includes elastic baffles, support frames, slide rails, lower guide plates, extension plates, upper guide plates, bolts, nuts, limit rods, and elastic plates. Elastic baffles are installed on the mounting frame, located in front of the two lower V-shaped blocks. A support frame is fixed to the lower part of the mounting frame. Slide rails are installed on both the front and rear sides of the upper part of the support frame. Two lower guide plates are slidably arranged between the two slide rails. An extension plate is fixed to the front end of the lower guide plate, and the front end of the extension plate extends beyond the mounting frame. Three bolts are evenly fixed to the lower guide plates. An upper guide plate is slidably arranged between the three longitudinally distributed bolts, forming a guide channel between the upper guide plate and the lower guide plate on the same side. Nuts are threaded on the bolts and are tightly attached to the side of the corresponding upper guide plate. A limit rod is fixed to the front end of the upper guide plate, and an elastic plate is slidably arranged on the limit rod. The elastic plate maintains sliding contact with the top surface of the upper guide plate, and the front end of the elastic plate has a raised baffle.

[0014] Furthermore, it also includes axles, with multiple axles arranged side by side and rotating on the upper part of the connecting frame. Rollers are provided at both ends of the axles, and the wheel surfaces of the rollers maintain rolling contact with the surface of the moving frame.

[0015] Furthermore, it also includes rotating wheels, with two parallel rotating wheels rotatably mounted on the upper part of the fixed block, the wheel surfaces of which maintain contact with the surface of the grinding rod.

[0016] The present invention has the following advantages: 1. The height of the grinding rod can be precisely adjusted by driving the limit frame to lift and lower it via an electric cylinder, ensuring that the axis of the grinding rod is aligned with the center of the inner hole of pipes of different diameters. Combined with the sliding sleeve of the grinding rod and the prismatic rod and the non-circular cross-section transmission structure, grinding rods with different inner diameters can be quickly replaced without disassembling other parts, which significantly improves the versatility, changeover efficiency and ease of operation of the equipment.

[0017] 2. The drive motor, pulley set 2, screw and lifting frame work together to drive the two lower V-shaped blocks to rise, and together with the upper two V-shaped blocks, they clamp the pipe fittings. It can be adapted to pipe fittings of different diameters, without the need to change the clamps, simplifying the operation process.

[0018] 3. By setting up connectors, air chambers and exhaust ports, an external air source can be connected to blow compressed air into the inner wall of the pipe fitting, effectively removing metal shavings generated during the grinding process, preventing secondary scratches, and ensuring the processing quality of the inner wall of the pipe fitting.

[0019] 4. By setting up elastic baffles, lower guide plates, extension plates, upper guide plates, and elastic plates, during feeding, the adjustable guide channel formed by the upper and lower guide plates guides the pipe fittings to roll accurately to the two lower V-shaped blocks. During unloading, the pipe fittings return to their normal position, and the baffle part raised at the front end of the elastic plate briefly blocks the pipe fittings. After the two lower V-shaped blocks return to their normal position, the pipe fittings are released, allowing them to fall to the extension plate and be guided to the collection area, thus improving the ability of automated continuous operation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a three-dimensional structural diagram of the components of the present invention, such as the fixing frame, the sliding frame, and the electric cylinder.

[0022] Figure 3 This is a partial cross-sectional view of the movable frame component of the present invention.

[0023] Figure 4 This is a three-dimensional structural diagram of the components of the present invention, including gear one, rotating plate, and gear two.

[0024] Figure 5 This is a partial cross-sectional view of the rotating frame, prism rod, and grinding rod components of the present invention.

[0025] Figure 6 This is a three-dimensional structural diagram of the drive motor, screw, and lifting frame components of the present invention.

[0026] Figure 7 This is a three-dimensional structural diagram of the components such as the lower guide plate, extension plate, and upper guide plate of the present invention.

[0027] Figure 8 This is a three-dimensional structural diagram of the screw, lifting frame, and V-block components of the present invention.

[0028] Figure 9 This is a three-dimensional structural diagram of the components such as the guide plate, bolts, and nuts of the present invention.

[0029] Figure 10 This is a three-dimensional structural diagram of the components such as the guide plate, limiting rod, and elastic plate of the present invention.

[0030] In the attached diagrams: 1. Mounting bracket; 101. Fixing plate; 2. Guide rail; 3. Moving frame; 4. Connecting frame; 5. Axle; 6. Control module; 7. Fixing frame; 8. Sliding frame; 9. Electric cylinder; 10. Limiting frame; 1001. Fixing block; 11. Limiting groove; 12. Rotating frame; 13. Prism rod; 14. Grinding rod; 141. Limiting block; 142. Rotating wheel; 15. Servo motor; 16. Lead screw; 17. Connecting block; 18. Gear one; 19. Rotating plate; 20. Gear two; 21. Swing. 22. Moving plate, 23. Belt pulley group one, 24. Connector, 25. Air chamber, 26. Exhaust port, 27. Drive motor, 28. Belt pulley group two, 28. Screw, 29. Support block, 20. Lifting frame, 20. Guide frame, 21. Sliding block, 22. V-block, 33. Elastic baffle, 34. Support frame, 35. Slide rail, 36. Lower guide plate, 37. Extension plate, 38. Upper guide plate, 39. Bolt, 30. Nut, 31. Limiting rod, 32. Elastic plate, 33. Chip collection box. Detailed Implementation

[0031] Example: An inner wall grinding device for processing hardware pipe fittings, such as... Figures 1-7 As shown, the system includes a mounting frame 1, guide rails 2, a movable frame 3, a connecting frame 4, a control module 6, a fixed frame 7, a sliding frame 8, an electric cylinder 9, a limit frame 10, a fixing block 1001, a rotating frame 12, a prismatic rod 13, a grinding rod 14, and a limit block 141. Two guide rails 2 are bolted to the left side of the middle of the mounting frame 1, and a movable frame 3 is slidably positioned between the two guide rails 2. A connecting frame 4 is bolted to the lower right side of the mounting frame 1, and a control module 6 is bolted to the lower part of the connecting frame 4. A fixed frame 7 is bolted to the upper left side of the connecting frame 4. A sliding frame 8 is fixedly mounted on the right side of the movable frame 3. An electric cylinder 9 is bolted to the upper right side of the mounting frame 1, and the electric cylinder 9 is electrically connected to the control module 6. The piston rod of the electric cylinder 9 extends vertically downward, and the end of the piston rod is bolted to a limit frame 10. The right end of the limit frame 10 forms a sliding fit with the mounting frame 1, and a fixing block 10 is fixedly connected to the left end of the limit frame 10. 01. The fixed block 1001 and the fixed frame 7 form a sliding fit. The lower part of the limiting frame 10 is symmetrically provided with two limiting grooves 11. A limiting block 141 is slidably arranged between the two limiting grooves 11. The limiting block 141 forms a sliding fit with the sliding frame 8. The limiting block 141 can slide horizontally along the limiting groove 11 and vertically along the sliding frame 8. A rotating frame 12 is rotatably arranged at the right end of the limiting frame 10. A prismatic rod 13 is fixedly inserted on the rotating frame 12. A grinding rod 14 is slidably sleeved on the prismatic rod 13. Based on the non-circular cross-section structure of the prismatic rod 13, the prismatic rod 13 can drive the grinding rod 14 to rotate synchronously, while allowing the grinding rod 14 to slide away axially. The right end of the grinding rod 14 passes horizontally through the limiting block 141 and forms a rotational fit with the limiting block 141. The limiting block 141 is initially located at the rightmost end of the two limiting grooves 11. The moving frame 3 is located at the rightmost position of the moving stroke, and the grinding rod 14 is located at the rightmost position of the grinding stroke.

[0032] like Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8As shown, the mounting frame 1 also includes a fixed plate 101, a drive motor 26, a second set of pulleys 261, a screw 27, a support block 271, a lifting frame 28, a guide frame 281, a slider 282, and a V-block 29. The drive motor 26 is bolted to the lower right side of the mounting frame 1 and is electrically connected to the control module 6. A screw 27 is rotatably mounted on the lower left side of the mounting frame 1. The output shaft of the drive motor 26 extends vertically downwards, and a second set of pulleys 261 is positioned between the output shaft and the lower end of the screw 27. A support block 271 is bolted to the middle left side of the mounting frame 1. The upper end of the screw 27 passes vertically through the support block 271 and forms a rotational engagement with it, improving the rotational stability of the screw 27. The screw 27 is screwed... The mounting frame 28 is equipped with a lifting frame 28. Two guide frames 281 are bolted to the support frame 31. A slider 282 is slidably mounted on the guide frame 281. The slider 282 is fixedly connected to the lifting frame 28. When the screw 27 drives the lifting frame 28 to rise or fall, the slider 282 can slide along the guide frame 281 to prevent the lifting frame 28 from deflecting. Two V-blocks 29 are bolted to the lifting frame 28. A fixing plate 101 is fixedly connected to the upper left side of the mounting frame 1. Two more V-blocks 29 are bolted to the bottom of the fixing plate 101. The two upper V-blocks 29 are arranged inverted, and the two lower V-blocks 29 are arranged upright. The four V-blocks 29 together form a self-centering clamping structure, which can accurately clamp pipes of different outer diameters.

[0033] like Figures 2-5 As shown, it also includes a servo motor 15, a lead screw 16, a connecting block 17, a first gear 18, a rotating plate 19, a second gear 20, a swing plate 21, and a pulley set 22. The servo motor 15 is bolted to the mounting frame 1. The servo motor 15 is electrically connected to the control module 6. The output shaft of the servo motor 15 extends horizontally to the right, and the lead screw 16 is fixedly connected to the output shaft via a coupling. The connecting block 17 is threaded through the lead screw 16 and is fixedly connected to the sliding frame 8. The rotating plate 19 is rotatably arranged on the right side of the middle of the mounting frame 1. The right end of the lead screw 16 passes horizontally through the rotating plate 19 and is fixedly connected to the first gear 18. The second gear 20 is rotatably arranged on the right side of the rotating plate 19. The first gear 18 and the second gear 20 mesh with each other. Their axial thicknesses are equal to ensure smooth transmission. The swing plate 21 is rotatably arranged between the second gear 20 and the right end of the prismatic rod 13. The pulley set 22 is arranged between the prismatic rod 13 and the second gear 20.

[0034] like Figure 4 and Figure 5As shown, it also includes a connector 23 and a chip collection box 39. The connector 23 is fixedly provided at the right end of the prismatic rod 13. An air chamber 24 is opened inside the prismatic rod 13. The connector 23 is connected to the air chamber 24. Two exhaust ports 25 are symmetrically opened at the left end of the grinding rod 14. The left end of the air chamber 24 is completely open. When the grinding rod 14 slides to the left along the prismatic rod 13, the exhaust port 25 avoids the air chamber 24, so that the gas in the air chamber 24 is blown out to the inner wall of the pipe through the exhaust port 25. The chip collection box 39 is connected to the left side of the mounting bracket 1 by bolts.

[0035] like Figure 1 , Figure 6 , Figure 7 , Figure 9 and Figure 10 As shown, it also includes an elastic baffle 30, a support frame 31, a slide rail 32, a lower guide plate 33, an extension plate 331, an upper guide plate 34, bolts 35, nuts 36, a limiting rod 37, and an elastic plate 38. The elastic baffle 30 is bolted to the mounting frame 1 and is located in front of the two lower V-shaped blocks 29. The support frame 31 is fixedly connected to the lower part of the mounting frame 1. Slide rails 32 are bolted to both the front and rear sides of the upper part of the support frame 31. Two lower guide plates 33 are slidably arranged between the two slide rails 32. An extension plate 331 is fixedly connected to the front end of the lower guide plate 33. The front end of the extension plate 331 extends beyond the mounting frame 1, guiding the pipe fitting to fall smoothly and preventing it from impacting the mounting frame 1. Three bolts 35 are fixedly connected to the material plate 33. An upper guide plate 34 is slidably arranged between the three longitudinally distributed bolts 35. The upper guide plate 34 and the lower guide plate 33 on the same side form a material guiding channel. Nuts 36 are threaded on the bolts 35. The nuts 36 are tightly attached to the side of the corresponding upper guide plate 34 to firmly lock the upper guide plate 34. A limit rod 37 is fixedly connected to the front end of the upper guide plate 34. An elastic plate 38 is slidably arranged on the limit rod 37. The elastic plate 38 maintains sliding contact with the top surface of the upper guide plate 34. The front end of the elastic plate 38 is provided with a raised material stop, which can temporarily block the pipe. In order to adapt to the blocking requirements of pipes with different diameters, the elastic plate 38 can slide along the limit rod 37 to adjust its front and rear positions.

[0036] like Figures 1-3 As shown, it also includes wheel axles 5. Multiple wheel axles 5 are arranged side by side and rotate on the upper part of the connecting frame 4. Rollers are provided at both ends of the wheel axles 5. The wheel surfaces of the rollers maintain rolling contact with the surface of the movable frame 3, thereby improving the stability of the movable frame 3 moving along the guide rail 2.

[0037] like Figure 3 As shown, it also includes a rotating wheel 142. Two rotating wheels 142 are rotatably arranged side by side on the upper part of the fixed block 1001. The wheel surface of the rotating wheel 142 keeps in contact with the rod surface of the grinding rod 14. When the grinding rod 14 rotates, the rotating wheel 142 rotates synchronously under the action of friction, providing radial support for the grinding rod 14 and reducing vibration.

[0038] Before use, adjust the height of the guide channel according to the diameter of the pipe to be processed. First, loosen the nut 36 outward to release the lock on the upper guide plate 34. Pull the upper guide plate 34 upward to the appropriate position so that the guide channel can accommodate pipes of different diameters. After adjustment, tighten the nut 36 to relock the upper guide plate 34. Then, pull the grinding rod 14 to the left to disengage it from the prism rod 13. Insert the grinding rod 14, which matches the inner diameter of the pipe, onto the prism rod 13 to the right. Then, adjust the distance between the two guide channels to match the length of the pipe. Place the pipe to be ground into the two guide channels. The foremost pipe is guided by the extension plate 331 and rolls onto the two lower V-blocks 29. The elastic baffle 30 assists in blocking the pipe. Start the drive motor 26 through the control module 6. The rotational power of the drive motor 26 is transmitted through... The pulley assembly 261 transmits power to the screw 27. The screw 27 rotates, driving the lifting frame 28 to rise. The lower V-block 29 moves the pipe upward. When the pipe contacts the upper V-block 29, the four V-blocks 29 self-center and clamp the pipe. The drive motor 26 is turned off, and then the electric cylinder 9 is started, controlling the piston rod of the electric cylinder 9 to extend, driving the limit frame 10 to descend. The fixed block 1001 slides down along the fixed frame 7, and the limit block 141 slides down along the sliding frame 8 until the axis of the grinding rod 14 is aligned with the center of the inner hole of the pipe. During this process, the swing plate 21 swings as the limit frame 10 descends, pushing the rotating plate 19 to rotate around the lead screw 16, ensuring that the gear 18 and gear 20 always maintain normal meshing. Then, the servo motor 15 is started, driving the lead screw 16 to rotate. The moving connecting block 17 and the sliding frame 8 move to the left, the moving frame 3 moves to the left synchronously along the guide rail 2, the limiting block 141 slides to the left along the limiting groove 11, and the grinding rod 14 slides to the left into the pipe along the prismatic rod 13 under the drive of the sliding frame 8. At the same time, the lead screw 16 rotates and drives the gear 20 to rotate through the gear 18. The gear 20 transmits the rotational power to the prismatic rod 13 through the pulley group 22. The prismatic rod 13 drives the grinding rod 14 to rotate at high speed to grind the inner wall of the pipe. Before grinding, the external air source is connected to the connector 23, and compressed air enters the air chamber 24. When the grinding rod 14 slides into the pipe, the exhaust port 25 is connected to the air chamber 24. The gas is ejected at high speed through the exhaust port 25 to blow away the metal chips generated by grinding, realizing online chip removal. The blown metal chips enter the chip collection box 39. The chip collection box 39 discharges chips through its bottom opening. After grinding, the servo motor 15 is reversed, and the lead screw 16 drives the connecting block 17 and the sliding frame 8 to move to the right. The grinding rod 14 retracts from the pipe. Then, the drive motor 26 is reversed, and the screw 27 drives the lifting frame 28 to descend. The two lower V-blocks 29 pull the pipe away from the two upper V-blocks 29. When the two lower V-blocks 29 descend below the elastic plate 38, the pipe is temporarily blocked by the raised baffle at the front end of the elastic plate 38. After the two lower V-blocks 29 return to their original positions, the pipe passes over the raised baffle at the front end of the elastic plate 38 under gravity and is guided by the extension plate 331 into the collection container in front of the mounting frame 1. If the pipe impacts the elastic baffle 30 when it falls, the elastic baffle 30 will deform elastically to avoid it.Ensure smooth material feeding.

Claims

1. An inner wall grinding device for processing hardware pipe fittings, characterized in that, The system includes a mounting frame (1), guide rails (2), a movable frame (3), a connecting frame (4), a control module (6), a fixed frame (7), a sliding frame (8), an electric cylinder (9), a limit frame (10), a fixing block (1001), a rotating frame (12), a prismatic rod (13), and a grinding rod (14). Two guide rails (2) are symmetrically mounted on the mounting frame (1), and a movable frame (3) slides between the two guide rails (2). A connecting frame (4) is mounted on the mounting frame (1), and a control module (6) is mounted on the lower part of the connecting frame (4). A fixed frame (7) is mounted on the upper left side of the connecting frame (4), and the movable frame (3)... A sliding frame (8) is fixed on the right side. An electric cylinder (9) is installed on the mounting frame (1). The electric cylinder (9) is electrically connected to the control module (6). A limit frame (10) is installed at the end of the piston rod of the electric cylinder (9). The right end of the limit frame (10) and the mounting frame (1) form a sliding fit. A fixing block (1001) is fixed to the left end of the limit frame (10). The fixing block (1001) and the fixing frame (7) form a sliding fit. A rotating frame (12) is rotatably installed on the right end of the limit frame (10). A prism rod (13) is fixedly inserted on the rotating frame (12). A grinding rod (14) is slidably sleeved on the prism rod (13).

2. The inner wall grinding device for processing hardware pipe fittings according to claim 1, characterized in that, It also includes a limiting block (141). Two limiting grooves (11) are symmetrically opened at the lower part of the limiting frame (10). The limiting block (141) is slidably arranged between the two limiting grooves (11). The limiting block (141) and the sliding frame (8) form a sliding fit. The right end of the grinding rod (14) passes horizontally through the limiting block (141) and forms a rotational fit with the limiting block (141).

3. The inner wall grinding device for processing hardware pipe fittings according to claim 2, characterized in that, The limiting block (141) is initially located at the rightmost end of the two limiting grooves (11), the moving frame (3) is located at the rightmost position of the moving stroke, and the grinding rod (14) is located at the rightmost position of the grinding stroke.

4. The inner wall grinding device for processing hardware pipe fittings according to claim 3, characterized in that, It also includes a fixed plate (101), a drive motor (26), a second set of pulleys (261), a screw (27), a support block (271), a lifting frame (28), and a V-block (29). The drive motor (26) is installed on the lower right side of the mounting frame (1). The drive motor (26) is electrically connected to the control module (6). The screw (27) is rotatably installed on the lower left side of the mounting frame (1). The second set of pulleys (261) is installed between the output shaft of the drive motor (26) and the lower end of the screw (27). The support block (271) is installed on the middle left side of the mounting frame (1). The upper end of the screw (27) passes vertically through the support block (271) and forms a rotational engagement with the support block (271). The screw (27) is threaded with a lifting frame (28). Two V-shaped blocks (29) are symmetrically installed on the lifting frame (28). A fixing plate (101) is fixedly connected to the upper left side of the mounting frame (1). Two other V-shaped blocks (29) are symmetrically installed at the bottom of the fixing plate (101). The two upper V-shaped blocks (29) are arranged in an inverted position, and the two lower V-shaped blocks (29) are arranged in an upright position. The four V-shaped blocks (29) together form a self-centering clamping structure.

5. The inner wall grinding device for processing hardware pipe fittings according to claim 4, characterized in that, It also includes a guide frame (281) and a slider (282). Two guide frames (281) are installed on the support frame (31). A slider (282) is slidably arranged on the guide frame (281). The slider (282) is fixedly connected to the lifting frame (28).

6. The inner wall grinding device for processing hardware pipe fittings according to claim 5, characterized in that, It also includes a servo motor (15), a lead screw (16), a connecting block (17), a gear one (18), a rotating plate (19), a gear two (20), a swing plate (21), and a pulley set one (22). The servo motor (15) is mounted on the mounting bracket (1). The servo motor (15) is electrically connected to the control module (6). The lead screw (16) is fixed to the output shaft of the servo motor (15). The connecting block (17) is threaded through the lead screw (16). The connecting block (17) is fixed to the sliding frame (8). Connected, a rotating plate (19) is rotatably arranged on the right side of the middle of the mounting bracket (1). The right end of the screw (16) passes horizontally through the rotating plate (19) and is fixedly connected to a gear one (18). A gear two (20) is rotatably arranged on the right side of the rotating plate (19). Gear one (18) meshes with gear two (20), and the two have the same axial thickness. A swing plate (21) is rotatably arranged between gear two (20) and the right end of the prism rod (13). A pulley group one (22) is arranged between the prism rod (13) and gear two (20).

7. The inner wall grinding device for processing hardware pipe fittings according to claim 6, characterized in that, It also includes a connector (23) and a chip collection box (39). The connector (23) is fixedly provided at the right end of the prismatic rod (13). An air chamber (24) is opened inside the prismatic rod (13). The connector (23) is connected to the air chamber (24). Two exhaust ports (25) are symmetrically opened at the left end of the grinding rod (14). The left end of the air chamber (24) is completely open. A chip collection box (39) is installed on the left side of the mounting bracket (1).

8. The inner wall grinding device for processing hardware pipe fittings according to claim 7, characterized in that, It also includes an elastic baffle (30), a support frame (31), a slide rail (32), a lower guide plate (33), an extension plate (331), an upper guide plate (34), bolts (35), nuts (36), a limit rod (37), and an elastic plate (38). An elastic baffle (30) is installed on the mounting frame (1). The elastic baffle (30) is located in front of the two lower V-shaped blocks (29). A support frame (31) is fixedly connected to the lower part of the mounting frame (1). Slide rails (32) are installed on both the front and rear sides of the upper part of the support frame (31). Two lower guide plates (33) are slidably arranged between the two slide rails (32). An extension plate (331) is fixedly connected to the front end of the lower guide plate (33). The front end of the plate (331) extends beyond the mounting frame (1). Three bolts (35) are evenly fixed on the lower guide plate (33). An upper guide plate (34) is slidably arranged between the three longitudinally distributed bolts (35). A guide channel is formed between the upper guide plate (34) and the lower guide plate (33) on the same side. Nuts (36) are threaded on the bolts (35). Nuts (36) are tightly attached to the side of the corresponding upper guide plate (34). A limit rod (37) is fixed to the front end of the upper guide plate (34). An elastic plate (38) is slidably arranged on the limit rod (37). The elastic plate (38) maintains sliding contact with the top surface of the upper guide plate (34). A raised baffle is provided at the front end of the elastic plate (38).

9. The inner wall grinding device for processing hardware pipe fittings according to claim 8, characterized in that, It also includes axles (5), and multiple axles (5) are arranged side by side on the upper part of the connecting frame (4). Rollers are provided at both ends of the axles (5), and the wheel surfaces of the rollers maintain rolling contact with the surface of the moving frame (3).

10. The inner wall grinding device for processing hardware pipe fittings according to claim 9, characterized in that, It also includes a rotating wheel (142), and two rotating wheels (142) are rotatably arranged on the upper part of the fixed block (1001), and the wheel surface of the rotating wheel (142) is in contact with the rod surface of the grinding rod (14).

Images