Concentric grinding and profile dressing apparatus for a roller assembly

Abstract

The present application relates to the technical field of wood grinding, and discloses a roller frame rubber-coated wheel concentric grinding and profile finishing device, which comprises a lathe body. The present application adopts a double-layer superimposed abrasive belt structure for outer layer grinding and inner layer polishing, and the whole rotation of the polishing assembly driven by a transposition motor is used to complete process switching. After transposition, the running direction of the inner polishing belt on the contact side of the workpiece is naturally opposite to the rotation direction of the workpiece, so that normal reverse cutting relative motion can be maintained without stopping to adjust the rotation direction of the workpiece spindle, the stable polishing processing efficiency is ensured, and the impact on the spindle transmission system caused by frequent start-stop and rotation switching is effectively avoided. Through the structure of the cooperating turntable guide groove, rocker arm and top rod sliding groove slope, the nozzle can be synchronously moved to the side to avoid and leave space for the workpiece to extend into, and is automatically lifted and displaced along the sliding groove slope to accurately align the polishing operation area, so that the nozzle position does not need to be manually adjusted, and the processing efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of wood grinding technology, specifically, it relates to a concentric grinding and contour trimming device for a rubber-coated roller frame. Background Technology

[0002] The rubber-coated roller is the core load-bearing component of the industrial conveyor roller frame. The coaxiality accuracy, surface roughness, and contour regularity of its outer surface directly determine the running stability of the roller frame and the positioning accuracy of the workpiece conveying. Therefore, after vulcanization molding, the rubber-coated roller must undergo concentric grinding of the outer circle and surface polishing finishing process.

[0003] In the prior art, in order to avoid frequent changes of abrasive belts, some processing equipment adopts a double-layered abrasive belt structure, with the outer side of the abrasive belt being the grinding layer and the inner side being the polishing layer. The processing steps are switched by flipping the abrasive belt assembly, attempting to complete rough grinding and fine polishing in the same clamping.

[0004] However, the abrasive belt itself has a fixed circulation direction. When the component flips and switches to the inner polishing belt contacting the workpiece, the rotation direction of the polishing belt on the side in contact with the workpiece will be the same as the rotation direction of the workpiece. The relative speed between the two will be greatly reduced, the polishing and cutting effect will be significantly weakened, and the processing efficiency will be significantly reduced. In order to maintain normal polishing efficiency, the machine must be stopped and the rotation direction of the lathe workpiece spindle must be adjusted to regain the relative motion of reverse cutting. This operation not only interrupts the continuity of processing, greatly extends the auxiliary working time and reduces production efficiency, but also the frequent start-stop and direction switching will impact the spindle transmission system, aggravate the wear of transmission components, and reduce the operating accuracy and service life of the equipment.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0007] A concentric grinding and contour trimming device for rubber-coated rollers includes a lathe body with a cross plate and a shift motor on the cross plate. The output end of the grinding and polishing assembly is fitted with a grinding belt and a polishing belt that overlap each other. Both the grinding belt and the polishing belt are annular structures. The grinding belt is sleeved on the outside of the polishing belt, and the two are completely fitted together to form a double-layer grinding belt structure with outer grinding and inner polishing. The shift motor is used to drive the grinding and polishing assembly to rotate as a whole, ensuring that the grinding belt and the polishing belt rotate in the opposite direction to the workpiece.

[0008] A bracket is rotatably mounted on the bottom of the horizontal plate, and a top rod is inserted into the end of the bracket. A nozzle is mounted on the top rod and is aligned with the grinding position.

[0009] A rocker arm is mounted on the rotation center of the bracket, and a slider is slidably mounted on the rocker arm. The top of the push rod is attached to a groove opened on the synchronous frame, and a slope is opened on the groove. The grinding and polishing assembly includes a turntable, and a guide groove is opened on the turntable. The slider is slidably disposed in the guide groove. When the shifting motor is started, it drives the nozzle at the end of the rocker arm to move to both sides, so that the workpiece moves to the surface of the polishing belt, and the push rod moves up along the slope to align with the polishing position.

[0010] In a preferred embodiment of the present invention, a rubber-coated wheel is held in the three-jaw chuck of the lathe body, and the axial position of the rubber-coated wheel is parallel to the horizontal sliding position of the cross plate.

[0011] In a preferred embodiment of the present invention, an electric slide rail is provided on the lathe body, a slide block is installed on the output end of the electric slide rail, a lifting electric push rod is installed on the slide block, a connecting plate is installed on the top of the lifting electric push rod, and a horizontal plate is also installed on the side wall of the connecting plate. The horizontal plate and the connecting plate are T-shaped, and several pairs of reinforcing plates are installed at the connection between the horizontal plate and the connecting plate. The several pairs of reinforcing plates are all triangular.

[0012] In a preferred embodiment of the present invention, the grinding and polishing assembly further includes a drive roller and two driven rollers, the two driven rollers being located below the drive roller. A synchronization frame is rotatably mounted on the drive roller and the two driven rollers, the bottom of the synchronization frame being installed below the turntable. A belt is provided on the outer wall of the drive roller and the two driven rollers, and the belt is connected to the grinding belt and the polishing belt. The grinding belt and the polishing belt do not contact the drive roller and the driven rollers. A drive motor is installed on the outer shell of the synchronization frame, and the output end of the drive motor is connected to the central axis of the drive roller.

[0013] In a preferred embodiment of the present invention, a retaining shaft is rotatably mounted at the bottom of the horizontal plate. The retaining shaft is connected to the rotation center of the bracket and the rocker arm. A sliding plate is mounted on the bracket. A top rod is movably mounted inside the sliding plate, and a fixing frame is mounted at the bottom of the top rod. The fixing frame is connected to the nozzle housing. A connecting pipe is mounted on the nozzle, and the connecting pipe is used to connect to the cooling liquid supply line to supply cooling medium during grinding and polishing operations.

[0014] In a preferred embodiment of the present invention, a ball bearing is installed on the top of the push rod and the ball bearing is placed in the slide groove. A baffle is also installed on the push rod. A compression spring is sleeved on the outer wall of the push rod. One end of the compression spring is engaged with the baffle and the other end of the compression spring is engaged with the slide plate. The compression spring is used to drive the ball bearing to always be in contact with the slide groove.

[0015] In a preferred embodiment of the present invention, the slide groove is arc-shaped, and a plug is provided at the end of the slide groove to prevent the slide groove and the ball from separating from each other. The slide groove is arc-shaped, and the center of curvature of the slide groove and the center of rotation of the bracket are on the same straight line.

[0016] In a preferred embodiment of the present invention, a connecting shaft is installed at the output end of the transposition motor, the connecting shaft movably passes through the horizontal plate, and the end of the connecting shaft is connected to the rotation center of the turntable.

[0017] In a preferred embodiment of the present invention, a sliding rod is installed through both ends of the slider, and the sliding rod is slidably disposed in the guide groove. The guide groove is curved inward along the rotation direction of the turntable, so as to realize the radial sliding and repositioning of the slider when the turntable rotates. A strip groove is opened on the rocker arm, and the rocker arm is in an inclined state. The sliding rod is slidably disposed inside the strip groove.

[0018] In a preferred embodiment of the present invention, a plug rod is movably inserted into the side wall of the slider, a limiting seat is movably inserted into the plug rod, the limiting seat is installed at the bottom of the horizontal plate, and a limiting plate is installed at the end of the plug rod. The limiting plate is used to prevent the plug rod and the limiting seat from separating from each other.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention employs a double-layered composite abrasive belt structure with an outer layer for grinding and an inner layer for polishing. The grinding and polishing assembly is rotated as a whole by a shifting motor to complete the process switching. After shifting, the rotation direction of the inner polishing belt on the workpiece contact side is naturally opposite to the workpiece's rotation direction. This eliminates the need to stop the machine to adjust the lathe's spindle rotation, maintaining normal reverse cutting relative motion and ensuring stable polishing efficiency. It effectively avoids the impact of frequent start-stop and rotation switching on the spindle transmission system, while simultaneously achieving continuous and seamless switching between grinding and polishing processes. This reduces auxiliary time for process switching and improves the overall processing efficiency of the rubber-coated wheel. Through a linkage structure with the turntable guide groove, rocker arm, and push rod slide ramp, the nozzle can move laterally during shifting to create space for the workpiece to extend. Simultaneously, it automatically rises and shifts along the slide ramp, precisely aligning with the polishing area without manual nozzle adjustment. Cooling medium is continuously supplied to both grinding and polishing stations through a connecting pipe, reducing the impact of processing heat on the rubber-coated wheel surface, minimizing surface burn defects, and ensuring surface quality.

[0021] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0022] In the attached diagram:

[0023] Figure 1A three-dimensional drawing of a roller frame rubber-coated wheel concentric grinding and contour trimming device;

[0024] Figure 2 A partial view of a roller frame rubber-coated wheel concentric grinding and contour dressing device Figure 1 ;

[0025] Figure 3 A partial view of a roller frame rubber-coated wheel concentric grinding and contour dressing device Figure 2 ;

[0026] Figure 4 This is a structural diagram of the grinding and polishing component of a concentric grinding and contour trimming equipment with rubber-coated rollers;

[0027] Figure 5 A top view of the horizontal plate of a roller frame rubber-coated wheel concentric grinding and contour trimming device;

[0028] Figure 6 A concentric grinding and contour dressing device for rubber-coated roller frames. Figure 5 Enlarged view of point A in the middle;

[0029] Figure 7 A concentric grinding and contour dressing device for rubber-coated roller frames. Figure 5 Enlarged view at point B in the middle;

[0030] Figure 8 This is a structural diagram of the guide groove of a roller frame rubber-coated wheel concentric grinding and contour trimming device.

[0031] In the diagram: 1. Lathe body; 2. Slide; 3. Electric slide rail; 4. Lifting electric push rod; 5. Connecting plate; 6. Cross plate; 7. Reinforcing plate; 8. Turntable; 9. Shifting motor; 10. Connecting shaft; 11. Synchronous frame; 12. Driven roller; 13. Drive roller; 14. Belt; 15. Grinding belt; 16. Polishing belt; 17. Drive motor; 18. Bracket; 19. Shaft clamp; 20. Slide plate; 21. Push rod; 22. Fixing frame; 23. Nozzle; 24. Connecting pipe; 25. Ball bearing; 26. Slide groove; 27. Inclined ramp; 28. Baffle; 29. ​​Compression spring; 30. Rocker arm; 31. Strip groove; 32. Slide rod; 33. Slider; 34. Insert rod; 35. Limit seat; 36. Limit plate; 37. Guide groove. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0033] Example 1:

[0034] like Figures 1 to 8As shown, a concentric grinding and contour trimming device for rubber-coated rollers includes a lathe body 1, a horizontal plate 6 on the lathe body 1, and a shifting motor 9 on the horizontal plate 6. The output end of the grinding and polishing assembly is fitted with a grinding belt 15 and a polishing belt 16 that overlap each other. Both the grinding belt 15 and the polishing belt 16 are annular structures. The grinding belt 15 is fitted on the outside of the polishing belt 16. The two are completely fitted together to form a double-layer grinding belt structure with outer grinding and inner polishing. The shifting motor 9 is used to drive the grinding and polishing assembly to rotate as a whole, ensuring that the grinding belt 15 and the polishing belt 16 rotate in the opposite direction to the workpiece.

[0035] A bracket 18 is rotatably mounted on the bottom of the horizontal plate 6. A top rod 21 is inserted into the end of the bracket 18, and a nozzle 23 is mounted on the top rod 21, with the nozzle 23 aligned with the grinding position.

[0036] A rocker arm 30 is mounted on the rotation center of the bracket 18. A slider 33 is slidably mounted on the rocker arm 30. The top of the push rod 21 is attached to the slide groove 26 opened on the synchronous frame 11, and the slide groove 26 is provided with a ramp 27. The grinding and polishing assembly includes a turntable 8, and a guide groove 37 is opened on the turntable 8. The slider 33 is slidably disposed in the guide groove 37. When the shifting motor 9 is started, it drives the nozzle 23 at the end of the rocker arm 30 to move to both sides, so that the workpiece moves to the surface of the polishing belt 16, and the push rod 21 moves up along the ramp 27 to align with the polishing position.

[0037] The double-layered grinding belt 15 and polishing belt 16 are arranged in a rotating manner with the shifting motor 9, which can flexibly switch between grinding and polishing processes without changing the abrasive belt, making it easy to adapt to different finishing needs and improving the smoothness of process connection.

[0038] like Figures 1 to 8 As shown, in a specific embodiment, a rubber-coated wheel is held in a three-jaw chuck on the lathe body 1, and the axial position of the rubber-coated wheel is parallel to the horizontal sliding position of the cross plate 6. This structural arrangement ensures that the machining datum of the rubber-coated wheel workpiece and the grinding assembly are relatively uniform, which facilitates maintaining a good concentric machining foundation and helps reduce machining eccentricity deviation.

[0039] like Figures 1 to 8 As shown, furthermore, an electric slide rail 3 is provided on the lathe body 1, and a slide block 2 is installed on the output end of the electric slide rail 3. A lifting electric push rod 4 is installed on the slide block 2, and a connecting plate 5 is installed on the top of the lifting electric push rod 4. A cross plate 6 is also installed on the side wall of the connecting plate 5. The cross plate 6 and the connecting plate 5 are T-shaped, and several pairs of reinforcing plates 7 are installed at the connection between the cross plate 6 and the connecting plate 5. The several pairs of reinforcing plates 7 are all triangular. The horizontal and vertical positions of the grinding components can be flexibly adjusted through the electric slide rail 3 and the lifting electric push rod 4 to adapt to the processing of rubber-coated wheels of different specifications. At the same time, the triangular reinforcing plates 7 can improve the connection structure strength between the cross plate 6 and the connecting plate 5, reduce processing wobbling, and help improve processing stability.

[0040] Example 2:

[0041] The difference between the above embodiments and this embodiment is that: Figures 1 to 8 As shown, the grinding and polishing assembly also includes a drive roller 13 and two driven rollers 12. The two driven rollers 12 are located below the drive roller 13. A synchronization frame 11 is rotatably mounted on the drive roller 13 and the two driven rollers 12. The bottom of the synchronization frame 11 is installed below the turntable 8. A belt 14 is provided on the outer wall of the drive roller 13 and the two driven rollers 12, and the belt 14 is connected to the grinding belt 15 and the polishing belt 16. The grinding belt 15 and the polishing belt 16 do not contact the drive roller 13 and the driven rollers 12. A drive motor 17 is installed on the outer shell of the synchronization frame 11, and the output end of the drive motor 17 is connected to the central axis of the drive roller 13. The synchronous circulation of the double-layer abrasive belt is achieved by using the drive roller 13 and the driven rollers 12 in conjunction with the belt 14. The structure is well-organized and can ensure the uniformity of the operation of the grinding belt 15 and the polishing belt 16, making it easy to maintain a stable grinding and polishing operation.

[0042] like Figures 1 to 8 As shown, in a specific embodiment, a retaining shaft 19 is rotatably mounted at the bottom of the horizontal plate 6. The retaining shaft 19 is connected to the rotation center of the bracket 18 and the rocker arm 30. A sliding plate 20 is mounted on the bracket 18, and a push rod 21 is movably installed inside the sliding plate 20. A fixing frame 22 is mounted at the bottom of the push rod 21, and the fixing frame 22 is connected to the outer shell of the nozzle 23. A connecting pipe 24 is mounted on the nozzle 23, and the connecting pipe 24 is used to connect to the cooling liquid supply line to supply cooling medium during grinding and polishing operations. Through the adjustable mounting structure of the nozzle 23 and the connecting pipe 24, the grinding station and the polishing station can be cooled at specific points, which can appropriately reduce the processing temperature rise, reduce thermal damage to the surface of the rubber-coated wheel, and help improve the surface processing quality of the workpiece.

[0043] like Figures 1 to 8 As shown, a ball bearing 25 is mounted on the top of the push rod 21, and the ball bearing 25 is placed in the slide groove 26. A baffle 28 is also mounted on the push rod 21, and a compression spring 29 is sleeved on the outer wall of the push rod 21. One end of the compression spring 29 is engaged with the baffle 28, and the other end is engaged with the slide plate 20. The compression spring 29 is used to drive the ball bearing 25 to always be in contact with the slide groove 26. With the elastic pressing action of the compression spring 29, the ball bearing 25 can always be in contact with the inner wall of the slide groove 26, reducing gap wobble and facilitating the smoothness and positional accuracy of the adjustment action of the push rod 21 and the nozzle 23.

[0044] Example 3:

[0045] The difference between the above embodiments and this embodiment is that: Figures 1 to 8As shown, the slide groove 26 is arc-shaped, and a plug is provided at the end of the slide groove 26 to prevent the slide groove 26 and the ball 25 from separating from each other. The center of curvature of the slide groove 26 and the rotation center of the bracket 18 are both on the same straight line. The arc-shaped structure of the slide groove 26, together with the end plug structure, can reasonably limit the sliding stroke of the ball 25, reduce the probability of the ball 25 falling out and failing, and facilitate the long-term stable operation of the repositioning adjustment structure.

[0046] like Figures 1 to 8 As shown, in a specific embodiment, a connecting shaft 10 is installed at the output end of the shift motor 9. The connecting shaft 10 movably passes through the horizontal plate 6, and the end of the connecting shaft 10 is connected to the rotation center of the turntable 8. The coaxial transmission between the shift motor 9 and the turntable 8 is achieved through the connecting shaft 10. The transmission structure is simple and can transmit rotational power relatively smoothly, which facilitates ensuring the synchronization of the workstation shifting action.

[0047] like Figures 1 to 8 As shown, furthermore, slide rods 32 are installed through both ends of the slider 33. The slide rods 32 are slidably disposed in the guide groove 37. The guide groove 37 is curved inward along the rotation direction of the turntable 8, realizing the radial sliding and repositioning of the slider 33 as the turntable 8 rotates. A strip groove 31 is provided on the rocker arm 30, and the rocker arm 30 is in an inclined state. The slide rods 32 are slidably disposed inside the strip groove 31. The curved guide groove 37, in conjunction with the strip groove 31, can convert the rotational motion of the turntable 8 into the radial sliding of the slider 33 and the swinging motion of the rocker arm 30, which can realize automated linkage repositioning, reduce manual adjustment steps, and facilitate the convenience of process switching.

[0048] like Figures 1 to 8 As shown, furthermore, a rod 34 is movably inserted into the side wall of the slider 33, and a limiting seat 35 is movably inserted into the rod 34. The limiting seat 35 is installed at the bottom of the horizontal plate 6, and a limiting plate 36 is installed at the end of the rod 34. The limiting plate 36 is used to prevent the rod 34 and the limiting seat 35 from separating from each other. Through the limiting and cooperating structure of the rod 34, the limiting seat 35 and the limiting plate 36, the swing trajectory of the rocker arm 30 can be appropriately constrained, reducing the possibility of mechanism deviation during the switching process, which is conducive to improving the overall operational stability of the equipment.

[0049] The implementation principle of the roller frame rubber-coated wheel concentric grinding and contour dressing equipment of the present invention is as follows:

[0050] Before operation, the rubber-coated wheel to be processed is clamped in the three-jaw chuck of the lathe body 1, and the rubber-coated wheel rotates continuously with the lathe spindle. The initial state of the equipment is the grinding station, at which time the grinding belt 15 faces the rubber-coated wheel workpiece, the nozzle 23 is aimed at the processing area of ​​the grinding belt 15, and the connecting pipe 24 is connected to the external cooling liquid supply line, which can continuously supply cooling medium during the grinding operation, reduce the heat generated by the grinding process, and reduce the burning of the rubber-coated wheel surface. The electric slide rail 3 drives the slide 2 to achieve horizontal feed, and the lifting electric push rod 4 drives the connecting plate 5 and the cross plate 6 to move up and down, thereby adjusting the processing distance between the grinding and polishing components and the rubber-coated wheel to ensure the reference accuracy of concentric grinding.

[0051] Start the drive motor 17, which drives the drive roller 13 to rotate. The drive roller 13 drives the double-layered grinding belt 15 and polishing belt 16 to rotate in a cycle through the belt 14. The outer grinding belt 15 contacts the surface of the rubber-coated wheel to complete the concentric grinding and rough contour finishing of the outer circle of the rubber-coated wheel.

[0052] When the grinding process is completed and it is necessary to switch to the polishing process, the shift motor 9 is started. The shift motor 9 drives the grinding and polishing assembly to rotate 180° through the connecting shaft 10 to complete the station switch. After the shift, the rubber-coated wheel workpiece extends into the gap between the drive roller 13 and the driven roller 12. The inner polishing belt 16 is attached to the bottom surface of the rubber-coated wheel workpiece. After the 180° overall rotation, the rotation direction of the inner polishing belt 16 is naturally opposite to the rotation direction of the rubber-coated wheel workpiece, so there is no need to stop the machine to adjust the direction of the drive motor 17.

[0053] At the same time, the shifting motor 9 drives the turntable 8 to rotate synchronously. The guide groove 37 opened on the turntable 8 bends inward along the rotation direction of the turntable 8. The slide rod 32 and the slider 33 slide radially along the guide groove 37. The slider 33 slides inside the strip groove 31 of the rocker arm 30, thereby driving the rocker arm 30 and the bracket 18 to swing around the rotation center of the clamping shaft 19. During the swing, the nozzle 23 moves from the central area of ​​the roller group to both sides to avoid the workpiece, making room for the workpiece to extend into, so that the polishing belt 16 and the workpiece can contact each other in a fixed position after polishing.

[0054] During the swinging and repositioning process of the rocker arm 30, the ball bearing 25 at the top of the push rod 21 slides upward along the ramp 27 of the slide groove 26 on the synchronous frame 11. The compression spring 29 continuously pushes the baffle 28, so that the ball bearing 25 always remains in contact with the inner wall of the slide groove 26. Simultaneously, the push rod 21 and the nozzle 23 are lifted, so that the nozzle 23 is aligned with the working area of ​​the polishing belt 16. The cooling medium is sprayed to the polishing position through the connecting pipe 24 and the nozzle 23.

[0055] After the repositioning is completed, the drive motor 17 continuously drives the double-layered grinding belt 15 and polishing belt 16 to rotate in a cycle. Relying on the reverse relative motion between the polishing belt 16 and the workpiece, the surface of the rubber-coated wheel that has been rough ground is finely polished and finished, thus completing the contour finishing of the rubber-coated wheel.

[0056] During the above process, the insert rod 34, the limiting seat 35, and the limiting plate 36 on the side wall of the slider 33 limit and constrain the movement trajectory of the rocker arm 30, preventing the mechanism from shifting during the repositioning process. The plug at the end of the slide groove 26 restricts the sliding stroke of the ball 25, preventing the ball 25 from falling out of the slide groove 26, and ensuring stable and reliable repositioning between the grinding station and the polishing station. The entire mechanism can sequentially complete the concentric grinding and contour polishing of the rubber-coated wheel under the same clamping state, without the need for secondary disassembly and assembly of the workpiece, effectively ensuring the coaxiality accuracy of the rubber-coated wheel processing.

[0057] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A concentric grinding and contour trimming device for rubber-coated roller frames, comprising a lathe body (1), characterized in that, The lathe body (1) is provided with a cross plate (6), and a shift motor (9) is provided on the cross plate (6). The output end of the grinding and polishing assembly is fitted with a grinding belt (15) and a polishing belt (16) that overlap each other. The grinding belt (15) and the polishing belt (16) are both ring structures. The grinding belt (15) is fitted on the outside of the polishing belt (16). The two are completely fitted together to form a double-layer grinding belt structure with outer grinding and inner polishing. The shift motor (9) is used to drive the grinding and polishing assembly to rotate as a whole, ensuring that the grinding belt (15) and the polishing belt (16) rotate in the opposite direction to the workpiece. A bracket (18) is rotatably mounted on the bottom of the horizontal plate (6), and a top rod (21) is inserted into the end of the bracket (18). A nozzle (23) is provided on the top rod (21), and the nozzle (23) is aligned with the grinding position. The support (18) has a rocker arm (30) mounted at its rotation center. A slider (33) is slidably mounted on the rocker arm (30). The top of the push rod (21) is attached to a groove (26) on the synchronous frame (11). A ramp (27) is provided on the groove (26). The polishing assembly includes a turntable (8). A guide groove (37) is provided on the turntable (8). The slider (33) is slidably disposed in the guide groove (37). When the shifting motor (9) is started, it drives the nozzle (23) at the end of the rocker arm (30) to move to both sides, so that the workpiece moves to the surface of the polishing belt (16). The push rod (21) moves up along the ramp (27) so that it is aligned with the polishing position.

2. The equipment for concentric grinding and contour trimming of rubber-coated roller frames according to claim 1, characterized in that, The lathe body (1) has a rubber-coated wheel clamped on its three-jaw chuck, and the axial position of the rubber-coated wheel is parallel to the horizontal sliding position of the timing frame (11).

3. The equipment for concentric grinding and contour trimming of rubber-coated roller frames according to claim 1, characterized in that, The lathe body (1) is provided with an electric slide rail (3), and a slide seat (2) is installed on the output end of the electric slide rail (3). A lifting electric push rod (4) is installed on the slide seat (2). A connecting plate (5) is installed on the top of the lifting electric push rod (4). A horizontal plate (6) is also installed on the side wall of the connecting plate (5). The horizontal plate (6) and the connecting plate (5) are T-shaped. Several pairs of reinforcing plates (7) are also installed at the connection between the horizontal plate (6) and the connecting plate (5). Several pairs of reinforcing plates (7) are triangular.

4. The equipment for concentric grinding and contour trimming of rubber-coated roller frames according to claim 1, characterized in that, The grinding and polishing assembly also includes a drive roller (13) and two driven rollers (12). The two driven rollers (12) are located below the drive roller (13). A timing frame (11) is rotatably mounted on the drive roller (13) and the two driven rollers (12). The bottom of the timing frame (11) is installed below the turntable (8). A belt (14) is provided on the outer wall of the drive roller (13) and the two driven rollers (12). The belt (14) is connected to the grinding belt (15) and the polishing belt (16). The grinding belt (15) and the polishing belt (16) do not contact the drive roller (13) and the driven rollers (12). A drive motor (17) is installed on the outer shell of the timing frame (11). The output end of the drive motor (17) is connected to the central axis of the drive roller (13).

5. The equipment for concentric grinding and contour trimming of rubber-coated roller frames according to claim 1, characterized in that, The bottom of the horizontal plate (6) is rotatably mounted with a retaining shaft (19), which is connected to the rotation center of the bracket (18) and the rocker arm (30). A sliding plate (20) is mounted on the bracket (18), and a push rod (21) is movably installed inside the sliding plate (20). A fixing frame (22) is mounted at the bottom of the push rod (21). The fixing frame (22) is connected to the outer shell of the nozzle (23). A connecting pipe (24) is mounted on the nozzle (23), and the connecting pipe (24) is used to connect with the cooling liquid supply line to supply cooling medium during grinding and polishing operations.

6. The equipment for concentric grinding and contour trimming of rubber-coated roller frames according to claim 5, characterized in that, The top of the push rod (21) is equipped with a ball bearing (25), and the ball bearing (25) is placed in the slide groove (26). A baffle (28) is also installed on the push rod (21). A compression spring (29) is sleeved on the outer wall of the push rod (21). One end of the compression spring (29) is engaged with the baffle (28), and the other end of the compression spring (29) is engaged with the slide plate (20). The compression spring (29) is used to drive the ball bearing (25) to always fit in the slide groove (26).

7. The equipment for concentric grinding and contour trimming of rubber-coated roller frames according to claim 1, characterized in that, The slide (26) is arc-shaped, and a plug is provided at the end of the slide (26) to prevent the slide (26) and the ball (25) from separating from each other. The slide (26) is arc-shaped, and the curvature center of the slide (26) and the rotation center of the bracket (18) are on the same straight line.

8. The equipment for concentric grinding and contour trimming of rubber-coated roller frames according to claim 1, characterized in that, The output end of the shift motor (9) is equipped with a connecting shaft (10), which moves through the horizontal plate (6). The end of the connecting shaft (10) is connected to the rotation center of the turntable (8).

9. The equipment for concentric grinding and contour trimming of rubber-coated roller frames according to claim 8, characterized in that, The slider (33) has a sliding rod (32) installed through both ends. The sliding rod (32) is slidably disposed in the guide groove (37). The guide groove (37) is bent inward along the rotation direction of the turntable (8) to realize the radial sliding and repositioning of the slider (33) as the turntable (8) rotates. The rocker arm (30) has a strip groove (31) and the rocker arm (30) is in an inclined state. The sliding rod (32) is slidably disposed inside the strip groove (31).

10. The equipment for concentric grinding and contour trimming of rubber-coated roller frames according to claim 8, characterized in that, The slider (33) is movably connected to the side wall of the insert rod (34), and the insert rod (34) is movably connected to the limit seat (35). The limit seat (35) is installed at the bottom of the horizontal plate (6), and the end of the insert rod (34) is equipped with a limit plate (36). The limit plate (36) is used to prevent the insert rod (34) and the limit seat (35) from separating from each other.

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