A grinding device and method for surface processing of a paper feed shaft polishing rod

Abstract

The present invention discloses a grinding device for surface processing of a paper feed shaft polishing rod in the technical field of shaft grinding equipment, comprising a bracket mechanism, wherein the bracket mechanism is arranged between the grinding wheel and the guide wheel, the bracket mechanism is used to provide support for the bottom of the workpiece, and the bracket mechanism can feedback the longitudinal feed position of the workpiece; a loading mechanism, wherein the loading mechanism is arranged at the front side of the upper end of the second chassis, and the loading mechanism can, according to the longitudinal feed position of the workpiece fed back by the bracket mechanism, make the longitudinal feed of the workpiece being ground sufficient to accommodate a new workpiece, and then load the new workpiece from the front side position between the grinding wheel and the guide wheel on the upper side of the second chassis; the present invention provides a new workpiece to be processed between the grinding wheel and the guide wheel in time through the loading mechanism, so that the loading of the workpiece is more coherent, and the grinding wheel and the guide wheel can grind as many workpieces as possible at the same time, further effectively improving the working efficiency of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of shaft grinding equipment, in particular to a grinding device and method for surface processing of a paper feed shaft grinding rod. Background Art

[0002] The paper feed shaft provides driving force for the paper by rotating against the paper. The friction generated during the relative rotation provides driving force for the paper. This requires the paper feed shaft to have high roundness and surface accuracy. Therefore, the raw materials for the production of paper feed shafts are mostly polished rods with high roundness and surface accuracy. When polishing the surface of the polishing rod, a centerless grinder is mostly used for processing.

[0003] The working principle of the centerless grinder is as follows: the workpiece rotates on a bracket between a high-speed rotating grinding wheel and a low-speed rotating guide wheel, wherein the grinding wheel grinds the workpiece, the guide wheel makes the workpiece move in a circular motion and drives the workpiece to be fed axially, and the degree of grinding is controlled by the rotation of the workpiece itself.

[0004] Therefore, during use, the positions of the grinding wheel and guide wheel will not change with the degree of grinding of the workpiece. Furthermore, the centerless grinder can process multiple workpieces with different grinding states at the same time (when the axial length of the grinding wheel and guide wheel is sufficient).

[0005] In the prior art, during the use of centerless grinders, workpieces are mostly placed in the grinder for grinding by manual loading. This makes the workpiece placement frequency susceptible to interference from human factors, the workpiece loading process has poor continuity, and the axial spacing between adjacent workpieces cannot be effectively shortened. As a result, the processing space of the centerless grinder cannot be efficiently utilized, which reduces the processing efficiency of the centerless grinder. Summary of the Invention

[0006] The purpose of the present invention is to provide a grinding device and method for surface processing of a paper feed shaft polishing rod, so as to solve the problem that in the prior art centerless grinders proposed in the above background technology, workpieces are mostly placed in the grinder for grinding by manual loading during use; this makes the frequency of workpiece placement susceptible to interference from human factors, the loading process of the workpieces has poor continuity, and the axial spacing between adjacent workpieces cannot be effectively shortened, thereby failing to efficiently utilize the processing space of the centerless grinder, resulting in a decrease in the processing efficiency of the centerless grinder.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a grinding device for processing the surface of a paper feed shaft polishing rod, comprising a fixing mechanism, a grinding wheel, a guide wheel, and a workpiece; a first chassis and a second chassis are fixedly connected to the left and right sides of the upper end of the fixing mechanism, respectively; the grinding wheel and the guide wheel are longitudinally arranged in the first chassis and the second chassis, respectively; the fixing mechanism further comprises a bracket mechanism, the bracket mechanism being arranged between the grinding wheel and the guide wheel, the bracket mechanism being used to provide support for the bottom of the workpiece, and the bracket mechanism being capable of providing feedback on the longitudinal feed position of the workpiece;

[0008] The loading mechanism is arranged on the front side of the upper end of the second chassis. The loading mechanism can feed the longitudinal feed position of the workpiece being ground to a position sufficient to accommodate a new workpiece based on the longitudinal feed position of the workpiece fed back by the bracket mechanism, and then load the new workpiece from the front position between the grinding wheel and the guide wheel on the upper side of the second chassis.

[0009] Furthermore, the support mechanism includes a vertically arranged support plate, and the support plate is provided with a feedback mechanism and a buffer mechanism; the feedback mechanism is used to feedback the feed position of the workpiece at the upper end of the support plate to the feeding mechanism; the buffer mechanism is used to reduce the impact on the workpiece during the feeding process of the feeding mechanism.

[0010] Furthermore, the feeding mechanism includes a hopper, which is fixedly arranged above the second chassis, and the bottom of the hopper is inclined to the lower left. The left end of the bottom of the hopper is fixedly connected to a discharge pipe connected thereto, and the cross-sectional area of ​​the discharge pipe can only accommodate a single workpiece passing through; a separation mechanism is provided at the lower end of the discharge pipe; the separation mechanism is used to prevent the workpiece in the discharge pipe from escaping from the discharge pipe from the lower end of the discharge pipe, and can control the single workpiece at the bottom of the discharge pipe to escaping from the discharge pipe and fall between the grinding wheel and the guide wheel.

[0011] Furthermore, the support plate is composed of a plurality of vertically arranged and mutually independent support blocks arranged longitudinally, and a set of feedback mechanisms and buffer mechanisms is provided at the lower end of each support block.

[0012] Furthermore, the feedback mechanism includes a mounting block, the mounting block is vertically slidably connected to a limit pin, the limit pin is fixed relative to the vertical limit displacement of the mounting block in the up and down directions, the upper end of the limit pin is fixedly connected to the lower end of the support block, a spring is fixedly connected between the support block and the mounting block and is mounted on the outer wall of the limit pin, and the limit pin is externally connected to a displacement sensor; the buffer mechanism is arranged at the lower end of the mounting block.

[0013] Furthermore, the buffer mechanism includes a first telescopic motor, and the output shaft of the first telescopic motor is fixedly connected to the lower end of the mounting block.

[0014] Furthermore, the separation mechanism includes separation wheels symmetrically arranged at the outlet below the discharge pipe, and the two separation wheels are each provided with three embedding grooves with the same position and arranged in a circular array. The inner wall of the embedding groove fits the outer wall of the workpiece, and the embedding groove can be engaged with the workpiece. The axes of the two separation wheels are commonly fixedly connected to a transmission shaft, and the upper end of the second chassis is fixedly connected to a support frame, and the support frame is used to support the transmission shaft. The support frame is fixedly connected to a drive motor, and the output shaft of the drive motor is transmission-connected to the transmission shaft.

[0015] Furthermore, the two separating wheels are provided with a first arc rod on the opposite side of the embedding groove, and the side walls of the first arc rod are slidably connected to the second arc rod along the arc trajectory of the first arc rod, the radius of the arc trajectory of the first arc rod and the second arc rod are the same, and the inner walls of the first arc rod and the second arc rod are aligned with the inner walls of the corresponding embedding grooves; the outer wall of the first arc rod is fixedly connected to the connecting block, the outer wall of the second arc rod is provided with teeth, the side wall of the connecting block is provided with a gear, and the connecting block is embedded with a motor, and the motor is used to drive the gear to rotate, and the gear The wheel is engaged with the teeth of the outer wall of the second arc rod, and the gear is used to drive the second arc rod to slide along the first arc rod, so that the second arc rod extends or retracts the first arc rod; after the second arc rod extends out of the first arc rod, the total arc of the second arc rod and the first arc rod is greater than one hundred and eighty degrees; the connecting blocks are all provided with a telescopic mechanism, and the telescopic mechanism is used to drive the first arc rod radially away from the axis of the separation wheel along the separation wheel; the lower end of the discharge tube is fixedly connected to the arc baffle, and when the mounting groove passes through the arc baffle, the arc baffle can prevent the workpiece in the mounting groove from escaping from the mounting groove.

[0016] Furthermore, the telescopic mechanism includes a second telescopic motor, the output shaft of the second telescopic motor is fixedly connected to the corresponding connecting block, and the output shaft of the second telescopic motor is telescopic in a radial direction along the separation wheel.

[0017] A grinding method for surface processing of a paper feed shaft polishing rod, the method is as follows:

[0018] S1. During the grinding process, the workpiece is placed between the grinding wheel and the guide wheel from the front end position between the grinding wheel and the guide wheel for grinding;

[0019] S2. During the grinding process, the support mechanism feeds back the longitudinal feed position of the workpiece to the feeding mechanism;

[0020] S3. When the upper front side of the support mechanism is able to accommodate a new workpiece to be processed, the loading mechanism loads the new workpiece.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides new workpieces to be processed between the grinding wheel and the guide wheel in a timely manner through the feeding mechanism, so that the equipment can effectively control the spacing between multiple longitudinally arranged workpieces between the grinding wheel and the guide wheel, making the loading of the workpieces more coherent, and enabling the grinding wheel and the guide wheel to grind as many workpieces as possible at the same time, further effectively improving the working efficiency of the equipment.

[0023] The present invention controls the vertical position of the support block - through the first telescopic motor, so that during the workpiece loading process, the support block - can be moved up to receive the material, thereby reducing the falling height of the workpiece from the loading mechanism during the workpiece loading process, thereby reducing the impact degree of the workpiece during the loading process and avoiding injuries during the workpiece loading process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the half-section structure of the feed pipe of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the present invention after removing the fixing mechanism, the first chassis, the second chassis, the hopper, the discharge pipe and the arc-shaped baffle;

[0027] Figure 4 for Figure 3 Schematic diagram of the front cross-section structure;

[0028] Figure 5 for Figure 4 A schematic diagram of the structure at center A;

[0029] Figure 6 for Figure 4 A magnified schematic diagram of the structure at point B in the middle;

[0030] Figure 7 for Figure 4 A magnified schematic diagram of the structure at point C in the middle;

[0031] Figure 8 for Figure 3 Left side view after removing the grinding wheel;

[0032] Figure 9 It is a schematic diagram of the process flow of the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0034] Fixing mechanism 1, grinding wheel 2, guide wheel 3, first chassis 4, second chassis 5, workpiece 6, support plate 7, support block 7-1, mounting block 8, limit pin 9, spring 10, first telescopic motor 11, hopper 12, discharge pipe 13, separation wheel 14, mounting groove 15, transmission shaft 16, support frame 17, drive motor 18, first arc rod 19, second arc rod 20, connecting block 21, gear 22, arc baffle 23, second telescopic motor 24. DETAILED DESCRIPTION

[0035] See also Figures 1-9 The present invention provides a technical solution: a grinding device for processing the surface of a paper feed shaft polishing rod, comprising a fixing mechanism 1, a grinding wheel 2, a guide wheel 3 and a workpiece 6; the left and right sides of the upper end of the fixing mechanism 1 are fixedly connected to a first chassis 4 and a second chassis 5 respectively, the axial directions of the grinding wheel 2 and the guide wheel 3 are longitudinally arranged in the first chassis 4 and the second chassis 5 respectively, and further comprising a bracket mechanism, the bracket mechanism being arranged between the grinding wheel 2 and the guide wheel 3, the bracket mechanism being used to provide support for the bottom of the workpiece 6, and the bracket mechanism being capable of feedback of the longitudinal feed position of the workpiece 6;

[0036] The loading mechanism is arranged on the front side of the upper end of the second chassis 5. The loading mechanism can feed the workpiece 6 being ground longitudinally to a position sufficient to accommodate a new workpiece 6 based on the longitudinal feed position of the workpiece 6 fed back by the bracket mechanism, and then load the new workpiece 6 from the front position between the upper direction grinding wheel 2 and the guide wheel 3 of the second chassis 5.

[0037] During the grinding process, the workpiece 6 is placed between the grinding wheel 2 and the guide wheel 3 from the front end position between the grinding wheel 2 and the guide wheel 3 for grinding. During the grinding process, the workpiece 6 is fed backward along the longitudinal direction of the support mechanism. During this process, the support mechanism feeds back the longitudinal feed position of the workpiece 6 to the loading mechanism. When the longitudinal feed length of the workpiece 6 is greater than the length of the workpiece 6, and the upper front side of the support mechanism can accommodate a new workpiece 6 to be processed, the loading mechanism loads the new workpiece 6 from the upper side of the second chassis 5 to the front position between the grinding wheel 2 and the guide wheel 3; further, during the continuous grinding process, multiple workpieces 6 with controllable longitudinal spacing can be arranged longitudinally between the grinding wheel 2 and the guide wheel 3; the grinding wheel 2 and the guide wheel 3 can grind as many workpieces 6 as possible at the same time, further effectively improving the working efficiency of the equipment.

[0038] The present invention provides new workpieces 6 to be processed between the grinding wheel 2 and the guide wheel 3 in a timely manner through the feeding mechanism, so that the equipment can effectively control the spacing between multiple longitudinally arranged workpieces 6 between the grinding wheel 2 and the guide wheel 3, making the feeding of the workpieces 6 more coherent, and enabling the grinding wheel 2 and the guide wheel 3 to grind as many workpieces 6 as possible at the same time, further, effectively improving the working efficiency of the equipment.

[0039] Furthermore, the support mechanism includes a vertically arranged support plate 7, and the support plate 7 is provided with a feedback mechanism and a buffer mechanism; the feedback mechanism is used to feedback the feeding position of the workpiece 6 at the upper end of the support plate 7 to the feeding mechanism; the buffer mechanism is used to reduce the impact on the workpiece 6 during the feeding process of the feeding mechanism.

[0040] Furthermore, the loading mechanism includes a hopper 12, which is fixedly arranged above the second chassis 5, and the bottom of the hopper 12 is tilted to the lower left. The left end of the bottom of the hopper 12 is fixedly connected to a discharge pipe 13 connected thereto, and the cross-sectional area of ​​the discharge pipe 13 can only accommodate a single workpiece 6 to pass through; a separation mechanism is provided at the lower end of the discharge pipe 13; the separation mechanism is used to prevent the workpiece 6 in the discharge pipe 13 from escaping from the discharge pipe 13 from the lower end of the discharge pipe 13, and can control the single workpiece 6 at the bottom of the discharge pipe 13 to escaping from the discharge pipe 13 and fall between the grinding wheel 2 and the guide wheel 3.

[0041] A plurality of workpieces 6 to be ground are placed in the hopper 12. Under the action of gravity, the workpieces 6 roll into the discharge tube 13 and are neatly arranged in the discharge tube 13. Under the action of the separation mechanism, according to the feedback signal of the bracket mechanism, the workpieces 6 are controlled to fall one by one between the grinding wheel 2 and the guide wheel 3 for loading.

[0042] Furthermore, the support plate 7 is composed of a plurality of vertically arranged and mutually independent support blocks 7 - 1 arranged longitudinally, and a set of feedback mechanism and buffer mechanism is provided at the lower end of each support block 7 - 1 .

[0043] Furthermore, the feedback mechanism includes a mounting block 8, the mounting block 8 is vertically slidably connected to a limit pin 9, the limit pin 9 is fixed relative to the vertical limit displacement of the mounting block 8 in the up and down directions, the upper end of the limit pin 9 is fixedly connected to the lower end of the support block 7-1, and a spring 10 is fixedly connected between the support block 7-1 and the mounting block 8 and is mounted on the outer wall of the limit pin 9, and the limit pin 9 is externally connected to a displacement sensor; the buffer mechanism is arranged at the lower end of the mounting block 8.

[0044] When there is a workpiece 6 at the upper end of the support block 7-1, under the action of the gravity of the workpiece 6, the support block 7-1 overcomes the elastic force of the spring 10 and moves downward relative to the mounting block 8, and drives the limit pin 9 to move downward. Correspondingly, when the workpiece 6 at the upper end of the support block 7-1 leaves the upper end of the support block 7-1 by longitudinal feeding, the support block 7-1 drives the limit pin 9 to move vertically upward under the action of the elastic force of the spring 10; in this way, by determining the number of adjacent support blocks 7-1 that move downward and the width of the support block 7-1 through the displacement sensor, it can be determined whether the previous workpiece 6 provides a loading position for the next workpiece 6 through longitudinal movement.

[0045] Furthermore, the buffer mechanism includes a first telescopic motor 11 , and an output shaft of the first telescopic motor 11 is fixedly connected to the lower end of the mounting block 8 .

[0046] When the limit pin 9 moves downward, there is no workpiece 6 on the upper end of the support block 7-1 above the limit pin 9. The support block 7-1 waits for a new workpiece 6 to fall in. At this time, the output shaft of the first telescopic motor 11 is controlled to extend upward through the feedback signal of the displacement sensor, so that the support block 7-1 moves upward, thereby reducing the vertical height from the upper end of the support block 7-1 to the loading mechanism, thereby reducing the falling height of the workpiece 6 from the loading mechanism during the loading process of the workpiece 6, thereby reducing the degree of impact received by the workpiece 6 during the loading process, and avoiding injuries to the workpiece 6 during the loading process.

[0047] The present invention controls the vertical position of the support block 7-1 through the first telescopic motor 11, so that during the loading process of the workpiece 6, the support block 7-1 can be moved up to receive the material, thereby reducing the falling height of the workpiece 6 from the loading mechanism during the loading process, thereby reducing the degree of impact received by the workpiece 6 during the loading process, and avoiding injuries to the workpiece 6 during the loading process.

[0048] Furthermore, the separation mechanism includes a separation wheel 14 symmetrically arranged at the outlet below the discharge pipe 13. The two separation wheels 14 are each provided with three embedding grooves 15 with the same position and arranged in a circular array. The inner wall of the embedding groove 15 is in contact with the outer wall of the workpiece 6. The embedding groove 15 can be engaged with the workpiece 6. The axis of the two separation wheels 14 is commonly fixedly connected to a transmission shaft 16. The upper end of the second chassis 5 is fixedly connected to a support frame 17. The support frame 17 is used to support the transmission shaft 16. The support frame 17 is fixedly connected to a drive motor 18. The output shaft of the drive motor 18 is transmission-connected to the transmission shaft 16.

[0049] In the initial state, an embedding groove 15 on the separation wheel 14 is opposite to the outlet of the discharge pipe 13. Correspondingly, the lowest workpiece 6 in the discharge pipe 13 falls into the embedding groove 15. Then, when the discharge mechanism needs to discharge a workpiece 6, the driving motor 18 controls the separation wheel 14 to rotate clockwise, so that the next embedding groove 15 in the counterclockwise direction of the embedding groove 15 with the workpiece 6 engaged is opposite to the outlet of the discharge pipe 13. During the rotation, the embedding groove 15 carries the engaged workpiece 6 away from the discharge pipe 13. At the same time, when the next embedding groove 15 reaches the outlet position of the discharge pipe 13, the outlet of the discharge pipe 13 is blocked by the outer wall of the separation wheel 14, thereby preventing the workpiece 6 in the discharge pipe 13 from leaving the discharge pipe 13.

[0050] Furthermore, the opposing surfaces of the two separation wheels 14 are located on the side of the embedding groove 15 and are each provided with a first arc rod 19, and the side walls of the first arc rod 19 are slidably connected to the second arc rod 20 along the arc trajectory of the first arc rod 19, the radius of the arc trajectory of the first arc rod 19 and the second arc rod 20 are the same, and the inner walls of the first arc rod 19 and the second arc rod 20 are aligned with the corresponding inner walls of the embedding groove 15; the outer wall of the first arc rod 19 is fixedly connected to a connecting block 21, and the outer wall of the second arc rod 20 is provided with teeth, and the side wall of the connecting block 21 is provided with a gear 22, and a motor is embedded in the connecting block 21, and the motor is used to drive the gear 22 to rotate, and the gear 22 is aligned with the corresponding inner wall of the embedding groove 15. The teeth on the outer wall of the second arc rod 20 are meshed, and the gear 22 is used to drive the second arc rod 20 to slide along the first arc rod 19, so that the second arc rod 20 extends or retracts the first arc rod 19; after the second arc rod 20 extends from the first arc rod 19, the total arc of the second arc rod 20 and the first arc rod 19 is greater than one hundred and eighty degrees; the connecting blocks 21 are all provided with a telescopic mechanism, which is used to drive the first arc rod 19 radially away from the axis of the separation wheel 14 along the separation wheel 14; the lower end of the discharge tube 13 is fixedly connected to an arc baffle 23, and when the embedding groove 15 passes through the arc baffle 23, the arc baffle 23 can prevent the workpiece 6 in the embedding groove 15 from escaping from the embedding groove 15.

[0051] Furthermore, the telescopic mechanism includes a second telescopic motor 24 , the output shaft of the second telescopic motor 24 is fixedly connected to the corresponding connecting block 21 , and the output shaft of the second telescopic motor 24 is telescopically directed along the radial direction of the separation wheel 14 .

[0052] like Figure 3 When one embedding groove 15 faces the outlet of the discharge pipe 13, the opening of the lowest embedding groove 15 faces downward;

[0053] Assume that the outlet of the discharge pipe 13 is at position a, and the bottom of the separation wheel 14 is at position b;

[0054] When the mounting groove 15 rotates clockwise from position a to position b, the mounting groove 15 first passes through the arc-shaped baffle 23. The arc-shaped baffle 23 blocks the workpiece 6 in the mounting groove 15 from escaping the arc-shaped baffle 23. During this process, the gear 22 rotates and drives the second arc-shaped rod 20 to extend from the first arc-shaped rod 19, so that the first arc-shaped rod 19 and the second arc-shaped rod 20 together form an arc-shaped rod with an arc greater than 180 degrees, thereby clamping the workpiece 6. After the mounting groove 15 leaves the arc-shaped baffle 23, the following two embodiments are possible:

[0055] Embodiment 1: After the mounting groove 15 moves to position b, the second telescopic motor 24 drives the first curved rod 19 and the second curved rod 20 to move vertically downward while holding the workpiece 6, placing the workpiece 6 between the support mechanism and the guide wheel 3, completing the unloading. Then, the gear 22 rotates and drives the second curved rod 20 to retract the first curved rod 19, allowing the workpiece 6 to be separated from the mounting groove 15. Finally, the second telescopic motor 24 drives the first curved rod 19 and the second curved rod 20 to move upward and reset.

[0056] Implementation method two: During the process of the embedding groove 15 moving to position b, the second telescopic motor 24 drives the first arc rod 19 and the second arc rod 20 away from the axis of the separation wheel 14, so that the workpiece 6 clamped by the first arc rod 19 and the second arc rod 20 is in contact with the guide wheel 3, and then through the process of the embedding groove 15 moving to position b, the guide wheel 3 drives the workpiece 6 to rotate, reducing the speed difference between the guide wheel 3 and the workpiece 6, and avoiding the workpiece 6 suddenly contacting the guide wheel 3 in the unloading method of implementation method one. Under the inertia caused by the speed difference, the workpiece 6 is subjected to excessive impact, resulting in violent vibration, causing production risks.

[0057] A grinding method for surface processing of a paper feed shaft polishing rod, the method is as follows:

[0058] S1, during the grinding process, the workpiece 6 is placed between the grinding wheel 2 and the guide wheel 3 from the front end position between the grinding wheel 2 and the guide wheel 3 for grinding;

[0059] S2. During the grinding process, the support mechanism feeds back the longitudinal feed position of the workpiece 6 to the feeding mechanism;

[0060] S3. When the upper front side of the support mechanism is able to accommodate a new workpiece 6 to be processed, the loading mechanism loads the new workpiece 6.

Claims

1. A grinding device for processing the surface of a paper feed shaft polishing rod, comprising a fixing mechanism (1), a grinding wheel (2), a guide wheel (3) and a workpiece (6); a first chassis (4) and a second chassis (5) are fixedly connected to the left and right sides of the upper end of the fixing mechanism (1), respectively; the axial directions of the grinding wheel (2) and the guide wheel (3) are longitudinally arranged in the first chassis (4) and the second chassis (5), respectively, and characterized in that: The invention comprises a support mechanism, the support mechanism being arranged between the grinding wheel (2) and the guide wheel (3), the support mechanism being used to provide support for the bottom of the workpiece (6), and the support mechanism being able to feedback the longitudinal feed position of the workpiece (6); a loading mechanism, the loading mechanism being arranged at the front side of the upper end of the second chassis (5), and the loading mechanism being able to feed back the longitudinal feed position of the workpiece (6) fed back by the support mechanism, so that when the longitudinal feed position of the workpiece (6) being ground is sufficient to accommodate a new workpiece (6), the new workpiece (6) is loaded from the upper side of the second chassis (5) to the front side position between the grinding wheel (2) and the guide wheel (3); The feeding mechanism comprises a hopper (12), the hopper (12) is fixedly arranged above the second chassis (5), the bottom of the hopper (12) is tilted downward to the left, the left end of the bottom of the hopper (12) is fixedly connected to a discharge pipe (13) in communication therewith, the cross-sectional area of ​​the discharge pipe (13) can only accommodate a single workpiece (6) passing through; a separation mechanism is provided at the lower end of the discharge pipe (13); the separation mechanism is used to prevent the workpiece (6) in the discharge pipe (13) from escaping from the discharge pipe (13) from the lower end of the discharge pipe (13), and can control the single workpiece (6) at the bottom of the discharge pipe (13) to escaping from the discharge pipe (13) and fall between the grinding wheel (2) and the guide wheel (3); The separation mechanism includes a separation wheel (14) symmetrically arranged at the outlet below the discharge pipe (13) in front and back directions, and the two separation wheels (14) are each provided with three embedding grooves (15) at the same position and arranged in a circular array, the inner wall of the embedding groove (15) is in contact with the outer wall of the workpiece (6), and the embedding groove (15) can be engaged with the workpiece (6), the axis of the two separation wheels (14) is fixedly connected to a transmission shaft (16), the upper end of the second chassis (5) is fixedly connected to a support frame (17), the support frame (17) is used to support the transmission shaft (16), the support frame (17) is fixedly connected to a drive motor (18), and the output shaft of the drive motor (18) is in transmission connection with the transmission shaft (16); The opposing surfaces of the two separation wheels (14) are both provided with a first arc rod (19) on the side of the embedding groove (15); the side walls of the first arc rod (19) are slidably connected to the second arc rod (20) along the arc track of the first arc rod (19); the radius of the arc track of the first arc rod (19) and the second arc rod (20) are the same; the inner walls of the first arc rod (19) and the second arc rod (20) are aligned with the inner walls of the corresponding embedding groove (15); the outer wall of the first arc rod (19) is fixedly connected to a connecting block (21); the outer wall of the second arc rod (20) is provided with teeth; the side wall of the connecting block (21) is provided with a gear (22); a motor is embedded in the connecting block (21); the motor is used to drive the gear (22) to rotate, and the gear (22) and the second arc rod ( The teeth of the outer wall of the second arc rod (20) are meshed, and the gear (22) is used to drive the second arc rod (20) to slide along the first arc rod (19), so that the second arc rod (20) extends or retracts the first arc rod (19); after the second arc rod (20) extends from the first arc rod (19), the total arc of the second arc rod (20) and the first arc rod (19) is greater than one hundred and eighty degrees; the connecting blocks (21) are all provided with a telescopic mechanism, and the telescopic mechanism is used to drive the first arc rod (19) to move radially away from the axis of the separation wheel (14) along the separation wheel (14); the lower end of the discharge tube (13) is fixedly connected with an arc baffle (23), and when the embedding groove (15) passes through the arc baffle (23), the arc baffle (23) can prevent the workpiece (6) in the embedding groove (15) from escaping from the embedding groove (15).

2. A grinding device for surface processing of a paper feed shaft polishing rod according to claim 1, characterized in that: The support mechanism comprises a vertically arranged support plate (7), and the support plate (7) is provided with a feedback mechanism and a buffer mechanism; the feedback mechanism is used to feed back the feeding position of the workpiece (6) at the upper end of the support plate (7) to the feeding mechanism; and the buffer mechanism is used to reduce the impact on the workpiece (6) during the feeding process of the feeding mechanism.

3. A grinding device for surface processing of a paper feed shaft polishing rod according to claim 2, characterized in that: The support plate (7) is composed of a plurality of vertically arranged and mutually independent support blocks (7-1) arranged longitudinally, and a set of feedback mechanisms and buffer mechanisms is provided at the lower end of each support block (7-1).

4. A grinding device for surface processing of a paper feed shaft polishing rod according to claim 3, characterized in that: The feedback mechanism comprises a mounting block (8), the mounting block (8) is vertically slidably connected to a limit pin (9), the limit pin (9) is fixed relative to the vertical limit displacement of the mounting block (8) in the up and down directions, the upper end of the limit pin (9) is fixedly connected to the lower end of the support block (7-1), a spring (10) sleeved on the outer wall of the limit pin (9) is fixedly connected between the support block (7-1) and the mounting block (8), and the limit pin (9) is externally connected to a displacement sensor; the buffer mechanism is arranged at the lower end of the mounting block (8).

5. A grinding device for surface processing of a paper feed shaft polishing rod according to claim 4, characterized in that: The buffer mechanism comprises a first telescopic motor (11), the output shaft of the first telescopic motor (11) being fixedly connected to the lower end of the mounting block (8).

6. The grinding device for surface processing of a paper feed shaft polishing rod according to claim 1, characterized in that: The telescopic mechanism comprises a second telescopic motor (24), the output shaft of the second telescopic motor (24) is fixedly connected to the corresponding connecting block (21), and the output shaft of the second telescopic motor (24) is telescopic in a radial direction along the separation wheel (14).

7. A method for polishing the surface of a paper feed shaft polishing rod, suitable for the polishing device for polishing the surface of a paper feed shaft polishing rod according to claims 1-6, characterized in that: The method is as follows: S1, during the grinding process, the workpiece (6) is placed between the grinding wheel (2) and the guide wheel (3) from the front end position between the grinding wheel (2) and the guide wheel (3) for grinding; S2. During the grinding process, the support mechanism feeds back the longitudinal feed position of the workpiece (6) to the feeding mechanism; S3. When the upper front side of the support mechanism is able to accommodate a new workpiece (6) to be processed, the loading mechanism loads the new workpiece (6).

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