Double-face automatic grinding device for end face of ceramic tubular workpiece

Abstract

The application discloses a kind of ceramic tubular workpiece end face double-face automatic grinding device, comprising: rack;Clamping drive assembly, for clamping tubular workpiece and driving tubular workpiece rotates along its axis;Sliding seat is equipped with two and respectively located left and right sides of clamping drive assembly, slidingly installed in rack, to be close to or away from tubular workpiece;Two sliding seats are all installed with first rotary drive mechanism, and the opposite side of two first rotary drive mechanisms is equipped with rotary output end, and rotary output end is connected with grinding disc;Feed drive mechanism, for driving sliding seat sliding along left and right directions.The application is realized by using double-face automatic grinding device, and the double-face synchronous grinding of ceramic tubular workpiece end face is realized, compared with traditional single-face grinding process, and the processing efficiency is significantly improved.Because two grinding discs simultaneously grind two end faces of workpiece, processing time is shortened by half, so as to improve overall production efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of pipe-shaped workpiece grinding, in particular to a ceramic pipe-shaped workpiece end face double-face automatic grinding device. BACKGROUND

[0002] With the rapid development of the industrial ceramic industry, the demand for ceramic pipe-shaped and rod-shaped parts is increasing, and the requirement for size precision is also increasing. The demand for high precision promotes the demand for efficient and precise grinding technology; at present, the end face grinding of ceramic pipe and rod-shaped workpieces mostly adopts a surface grinder, and the workpiece is clamped in a clamp by manual operation and then placed on the grinding machine workbench for single-face grinding. After grinding one end face, the workpiece needs to be turned over for grinding the other end face. This production method has high labor intensity, low production efficiency and high production cost. SUMMARY

[0003] The application aims to at least solve one of the technical problems existing in the prior art. To this end, the application provides a ceramic pipe-shaped workpiece end face double-face automatic grinding device.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows:

[0005] A ceramic pipe-shaped workpiece end face double-face automatic grinding device comprises a rack, a clamping driving assembly for clamping a pipe-shaped workpiece and driving the pipe-shaped workpiece to rotate along its axis, two sliding seats arranged on the left and right sides of the clamping driving assembly and slidingly installed on the rack in the left-right direction to approach or move away from the pipe-shaped workpiece, a first rotary driving mechanism installed on each of the two sliding seats, a rotary output end arranged on the opposite side of each of the two first rotary driving mechanisms, and a grinding disc connected to the rotary output end, and a feeding driving mechanism for driving the sliding seat to slide in the left-right direction.

[0006] Further, the clamping driving assembly comprises two bearing limiting rollers arranged at intervals in the front-rear direction and used for bearing the pipe-shaped workpiece, a second rotary driving mechanism for driving the bearing limiting rollers to rotate, and two bearing limiting rollers having the same rotating direction, and a lifting driving mechanism having a movable end capable of lifting, and the movable end is provided with a pressing limiting roller capable of rotating along its axis.

[0007] Further, the second rotary driving mechanism is a motor, the output shaft of the motor is connected with a gear transmission box, the gear transmission box has an output driving shaft extending to the outside, the output driving shaft is provided with a transmission wheel, one end of the central shaft of each of the two bearing limiting rollers is connected with a driven wheel, and the transmission wheel and the two driven wheels are in transmission connection.

[0008] Further, the grinding disc is annular.

[0009] Further, the grinding disc is detachably connected with the rotating output end.

[0010] Further, the rotating output end is connected with a connecting seat, one end of the connecting seat away from the rotating output end is provided with a mounting seat, and the grinding disc is detachably mounted on the outer end face of the mounting seat.

[0011] Further, the outer end of the mounting seat is provided with a central hole, the grinding disc is provided with an embedded part embedded in the central hole, the embedded part is profile-fitted with the central hole to realize torque transmission, the inner end of the embedded part is provided with a cylindrical part, the peripheral wall of the cylindrical part is provided with a clamping protrusion, and a clamping gap is formed between the clamping protrusion and the embedded part; a clamping ring is rotatably sleeved on the peripheral wall of the mounting seat, the clamping ring is provided with a clamping block penetrating the peripheral wall of the mounting seat and embedded in the central hole, and the peripheral wall of the mounting seat is provided with a penetrating strip-shaped hole for the clamping block to rotatably move; the clamping ring has a first state and a second state, the clamping block on the clamping ring in the first state is embedded in the clamping gap, and the clamping block on the clamping ring in the second state is staggered with the clamping gap; an elastic positioning column is elastically movably mounted on the peripheral wall of the connecting seat, and the peripheral wall of the clamping ring is provided with a clamping opening; the elastic positioning column can be embedded in the clamping opening on the clamping ring in the first state under the action of an elastic force.

[0012] Further, the penetrating strip-shaped hole is provided with a mounting opening staggered with the clamping gap, and the mounting opening is provided at an opening end facing the connecting seat.

[0013] Further, the peripheral wall of the connecting seat is provided with a mounting plate, the mounting plate is provided with a through hole, the elastic positioning column comprises a central rod slidingly penetrating the through hole, one end of the central rod facing the clamping ring is provided with a plug column for being inserted into the clamping opening, the other end of the central rod penetrates the mounting plate and is connected with a nut, a compression spring is sleeved on the plug column, and the two ends of the compression spring are respectively abutted with the plug column and the mounting plate.

[0014] Further, an adjusting plate is slidably mounted on the rack along the front-rear direction, and the feeding driving mechanism is mounted on the adjusting plate; and the sliding seat is slidably mounted on the adjusting plate along the left-right direction.

[0015] The present application has the following beneficial effects:

[0016] By adopting the double-sided automatic grinding device, double-sided synchronous grinding of the end faces of the ceramic tubular workpiece is realized, and compared with the traditional single-sided grinding process, the processing efficiency is significantly improved. Since two grinding discs simultaneously grind two end faces of the workpiece, the processing time is shortened by half, thereby improving the overall production efficiency. The clamping driving assembly can stably clamp the workpiece and drive the workpiece to rotate along the axis thereof, ensuring the uniformity of the grinding process. The design of the sliding seat enables independent control of the two grinding discs, improving the flexibility and utilization rate of the equipment.

[0017] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of this application, are intended to provide further understanding of the application and are incorporated herein in

[0019] Figure 1 is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 is an enlarged view of A of Figure 1

[0021] Figure 3 is a schematic diagram of the overall structure of the present application from another perspective;

[0022] Figure 4 is a schematic diagram of the partial structure of the present application;

[0023] Figure 5 is a schematic diagram of the mounting structure of the grinding disc;

[0024] Figure 6 is a sectional view of Figure 5

[0025] Figure 7 is a schematic diagram of the exploded state structure of Figure 5

[0026] Figure 8 is a schematic diagram of the structure of Figure 7 from another perspective;

[0027] Figure 9 is a schematic diagram of the exploded state structure of the retaining ring and the mounting seat.

[0028] LEGEND

[0029] frame 100, tubular workpiece 101, adjusting plate 110;

[0030] sliding seat 200, first rotary driving mechanism 210, connecting seat 220, mounting plate 221, through hole 222, positioning groove 223, mounting seat 230, central hole 231, through strip hole 232, mounting inlet 233, positioning protrusion 234, retaining ring 240, retaining block 241, retaining opening 242, elastic positioning column 250, central rod 251, insertion column 252, nut 253, compression spring 254;

[0031] grinding disc 300, embedded portion 310, retaining protrusion 311, retaining gap 312, cylindrical portion 313;​​​

[0032] feeding driving mechanism 400;

[0033] supporting limiting roller 500;

[0034] lifting driving mechanism 600, movable end 610, and pressing positioning roller 620;

[0035] gear transmission box 700, transmission wheel 710, and driven wheel 720. DETAILED DESCRIPTION

[0036] It should be understood that the specific embodiments described herein are merely exemplary and are not intended to limit the present application.

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0039] In addition, the description of "first", "second", etc. in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0040] Please refer to Figures 1 to 3 In a preferred embodiment of the present application, a ceramic tubular workpiece end face double-face automatic grinding device is provided, which comprises a rack 100, a clamping driving assembly, a sliding seat 200, a grinding disc 300, and a feeding driving mechanism 400.

[0041] The clamping drive assembly is used for clamping the tubular workpiece 101 and driving the tubular workpiece to rotate along the axis thereof. The sliding seat 200 is provided with two sliding seats 200 and is located on the left and right sides of the clamping drive assembly respectively. The sliding seat 200 is slidingly installed on the rack 100 in the left-right direction to approach or move away from the tubular workpiece 101. The first rotary drive mechanism 210 is installed on the two sliding seats 200. The opposite sides of the two first rotary drive mechanisms 210 are provided with rotary output ends, and the rotary output ends are connected with the grinding discs 300. The feeding drive mechanism 400 is used for driving the sliding seat 200 to slide in the left-right direction. The first rotary drive mechanism 210 can be a motor, and the rotary output end is the rotary output shaft of the motor. The feeding drive mechanism 400 can be a motor, and the output shaft of the motor is connected with a lead screw. The sliding seat 200 is provided with a nut pair matched with the lead screw, so as to realize the sliding drive of the sliding seat 200. It can be understood that the device will be matched with a detection mechanism for use. The position of the two end faces of the tubular workpiece 101 is detected by the detection mechanism, so as to determine the feeding distance.

[0042] The ceramic tubular workpiece end face double-face automatic grinding device provided by the application realizes synchronous grinding of the two end faces of the ceramic tubular workpiece by adopting the double-face automatic grinding device, and the processing efficiency is significantly improved compared with the traditional single-face grinding process. Since the two grinding discs 300 simultaneously grind the two end faces of the workpiece, the processing time is shortened by half, thereby improving the overall production efficiency. The clamping drive assembly can stably clamp the workpiece and drive the workpiece to rotate along the axis thereof, thereby ensuring the uniformity of the grinding process. The design of the sliding seat 200 enables the two grinding discs 300 to be independently controlled, thereby improving the flexibility and utilization rate of the equipment.

[0043] Referring to Figure 2 In the specific embodiments of the application, the clamping drive assembly comprises a supporting and limiting roller 500, a second rotary drive mechanism and a lifting drive mechanism 600. The supporting and limiting roller 500 is provided with two supporting and limiting rollers 500 which are spaced apart in the front-rear direction and are used for supporting the tubular workpiece 101 and can be matched with different specifications of the tubular workpiece 101. The second rotary drive mechanism is used for driving the supporting and limiting roller 500 to rotate and move, and the two supporting and limiting rollers 500 rotate in the same direction, thereby driving the tubular workpiece 101 to rotate. The lifting drive mechanism 600 has a movable end 610 which can move up and down. The lifting drive mechanism 600 can be a pneumatic cylinder or a hydraulic cylinder. The movable end 610 is provided with a pressing and positioning roller 620 which can rotate along the axis thereof. During processing, the lifting drive mechanism 600 drives the movable end 610 and the pressing and positioning roller 620 to move downward and press the tubular workpiece 101 on the supporting and limiting roller 500, thereby clamping the workpiece and enabling the supporting and limiting roller 500 to be in close contact with the tubular workpiece 101, so that the tubular workpiece 101 can be driven to rotate by sufficient friction.

[0044] Referring to Figure 4In further embodiments of the present application, the second rotary driving mechanism is an electric motor, the output shaft of the electric motor is connected with a gear transmission box 700, the gear transmission box 700 has an output driving shaft extending to the outside, the gear transmission box 700 is internally provided with a gear set, having an input gear and an output gear, the input gear and the output gear are directly drivingly connected or drivingly connected through an additional gear; the central shaft of the input gear is connected with the output shaft of the electric motor, and the central shaft of the output gear is the output driving shaft. The output driving shaft is provided with a transmission wheel 710, the transmission wheel 710 rotates synchronously with the output driving shaft, and the central shaft of each of the two supporting and limiting rollers 500 is connected with a driven wheel 720, the driven wheel 720 rotates synchronously with the central shaft of the corresponding supporting and limiting roller 500. The transmission wheel 710 and the two driven wheels 720 are drivingly connected, specifically, the transmission wheel 710 and the two driven wheels 720 are drivingly connected through the same belt, and the transmission wheel 710 and the two driven wheels 720 are all belt wheels.

[0045] In some embodiments of the present application, the grinding disc 300 is annular, which can reduce the contact area between the grinding disc 300 and the tubular workpiece 101. If a solid grinding disc is used, the material waste is large, and the rotation of the grinding disc 300 can make the annular end face of the grinding disc 300 realize grinding, so that the material utilization rate is maximized, and the replacement cost of the grinding disc 300 is reduced.

[0046] Referring to Figure 1 In further embodiments of the present application, the rack 100 is slidingly installed with an adjusting plate 110 in the front-rear direction, the feeding driving mechanism 400 is installed on the adjusting plate 110, and the sliding seat 200 is slidingly installed on the adjusting plate 110 in the left-right direction. Thus, the front-rear position of the grinding disc 300 is adjusted through the front-rear movement of the adjusting plate 110, so that the position of the grinding disc 300 can be adjusted and adapted according to the diameter of the tubular workpiece 101, and the application range of the device is improved. Specifically, the adjusting plate 110 can be moved forward and backward by manually driving a crank or a driving motor, and the bottom of the adjusting plate 110 is provided with a nut seat, a lead screw connected with the driving motor is adapted with the nut seat to realize the movement adjustment of the adjusting plate 110.

[0047] In further embodiments of the present application, the grinding disc 300 is detachably connected with the rotary output end, so that the grinding disc 300 can be replaced alone when it is seriously worn, and the maintenance cost is reduced.

[0048] Referring to Figures 5 to 9 In further embodiments of the present application, the rotary output end is connected with a connecting seat 220, and the connecting seat 220 and the rotary output end can be connected and fixed by welding, integral molding or fasteners. The connecting seat 220 is provided with a mounting seat 230 at the end away from the rotary output end, and the grinding disc 300 is detachably mounted on the outer end face of the mounting seat 230.

[0049] Referring to Figures 5 to 9In further embodiments of the application, the mounting seat 230 is provided with a central hole 231 at the outer end of the mounting seat 230, i.e. the end facing away from the rotating output end. The grinding disc 300 is provided with an embedded portion 310 embedded in the central hole 231, and the embedded portion 310 and the central hole 231 are profile-fitted to achieve torque transmission. Specifically, the cross-sectional profile of the embedded portion 310 and the central hole 231 are both regular polygons, so that the mounting seat 230 and the grinding disc 300 are torque-transmitted and synchronously rotated by the embedded portion 310 embedded in the central hole 231, and the grinding disc 300 is centrally and circumferentially positioned. The embedded portion 310 is provided with a cylindrical portion 313 at the inner end of the embedded portion 310, i.e. the end facing the rotating output end. The cylindrical portion 313 is provided with a clamping protrusion 311, and a clamping gap 312 is formed between the clamping protrusion 311 and the embedded portion 310. A clamping ring 240 is rotatably sleeved around the outer periphery of the mounting seat 230, and the clamping ring 240 is provided with a clamping block 241 embedded in the central hole 231 and penetrating the peripheral wall of the mounting seat 230. The peripheral wall of the mounting seat 230 is provided with a penetrating strip-shaped hole 232 for the rotational movement of the clamping block 241. The clamping block 241 penetrates the peripheral wall of the mounting seat 230 and is embedded in the central hole 231 by being threaded through the penetrating strip-shaped hole 232. The penetrating strip-shaped hole 232 is an arc-shaped strip hole, so that the clamping block 241 can move in the penetrating strip-shaped hole 232 without interference when the clamping ring 240 rotates. The clamping ring 240 has a first state and a second state, and the clamping ring 240 can switch states by rotating along the peripheral wall of the mounting seat 230. As shown in Figure 5 and Figure 6 , the clamping block 241 on the clamping ring 240 in the first state is embedded in the clamping gap 312, thereby achieving axial positioning of the grinding disc 300 and fixing the position of the grinding disc 300. The clamping block 241 on the clamping ring 240 in the second state is misaligned with the clamping gap 312, thereby failing to position the grinding disc 300 axially, so that the grinding disc 300 can be removed. The clamping ring 240 is rotatably and elastically mounted with an elastic positioning column 250 on the peripheral wall of the clamping ring 240, and the clamping ring 240 is provided with a clamping opening 242. The elastic positioning column 250 can be embedded in the clamping opening 242 on the clamping ring 240 in the first state under the action of the elastic force, thereby positioning the clamping ring 240 and preventing the clamping ring 240 from rotating to switch states, so that the clamping ring 240 remains in the first state, achieving stable positioning of the grinding disc 300 and stabilizing the position of the grinding disc 300. The mounting seat 230 provides sufficient mounting space for the elastic positioning column 250.

[0050] Referring to Figures 7 to 9In further embodiments of the present application, the through strip-shaped hole 232 is provided with a mounting entrance 233 staggered with the clamping gap 312, the mounting entrance 233 is open to one end of the connecting seat 220, so that when the clamping ring 240 is installed and disassembled, the clamping block 241 can enter or exit the through strip-shaped hole 232 from the mounting entrance 233. The clamping ring 240 can block the through strip-shaped hole 232 and the mounting entrance 233 in the first state. After the connecting seat 220 is connected with the mounting seat 230, the connecting seat 220 will block the opening of the mounting entrance 233, so that the clamping ring 240 cannot be separated from the mounting seat 230. The clamping block 241 of the clamping ring 240 in the second state is aligned with the mounting entrance 233, as shown in Figure 9 When the clamping ring 240 reaches the second state, the clamping block 241 can be separated from the mounting seat 230 from the mounting entrance 233, so as to realize the separation from the mounting seat 230 and realize the disassembly. In order to facilitate the judgment of the clamping ring 240 reaching the first state and the second state, the clamping block 241 is in contact with the two end walls of the through strip-shaped hole 232, respectively reaching the first state and the second state. That is, when the state needs to be switched, the clamping ring 240 is directly rotated towards the other end of the through strip-shaped hole 232 until it is in contact with the end wall of the other end of the through strip-shaped hole 232, that is, it is switched to the other state, which is convenient to operate and does not need to judge whether the clamping ring 240 reaches the specified state with the naked eye. The connecting seat 220 and the mounting seat 230 can be connected and fixed by fasteners, the connecting seat 220 is provided with a positioning groove 223, the mounting seat 230 is provided with a positioning protrusion 234 embedded in the positioning groove 223, and the positioning protrusion 234 and the groove wall of the positioning groove 223 are provided with corresponding hole positions to be connected and fixed by fasteners. The independent design of the connecting seat 220 and the mounting seat 230 and the detachable connection facilitate the installation and disassembly of the clamping ring 240 and avoid the long length of the mounting entrance 233.

[0051] Of course, in some other embodiments, the connecting seat 220 and the mounting seat 230 are integrally connected, and the mounting entrance 233 extends to the end face of the connecting seat 220 away from the mounting seat 230.

[0052] Referring to Figure 6 and Figure 7In further embodiments of the present application, the outer peripheral wall of the connecting seat 220 is provided with a mounting plate 221, and the mounting plate 221 is provided with a through hole 222. The elastic positioning column 250 includes a center rod 251 slidingly passing through the through hole 222. The center rod 251 is profile-fitted with the through hole 222 to serve as a guide and centering. One end of the center rod 251 is provided with an insertion column 252 for insertion into the clamping opening 242. The other end of the center rod 251 passes through the mounting plate 221 and is connected with a nut 253. The end of the center rod 251 is provided with a threaded shaft for threaded connection with the nut 253. Thus, the profile of the nut 253 is larger than that of the through hole 222, so as to limit the active stroke of the elastic positioning column 250 and avoid the center rod 251 from being separated from the through hole 222. A compression spring 254 is sleeved on the insertion column 252, and the two ends of the compression spring 254 abut against the insertion column 252 and the mounting plate 221, respectively. The diameter of the insertion column 252 is larger than that of the center rod 251. Thus, the elastic positioning column 250 is elastically and movably mounted. The insertion column 252 will be kept in the state of being inserted into the clamping opening 242 under the action of the compression spring 254. When it is needed to switch the state of the clamping ring 240, the insertion column 252 only needs to be pulled out of the clamping opening 242, and then the clamping ring 240 can be rotated.

[0053] In order to realize multi-position limiting and avoid stress concentration, the clamping protrusions 311 and the clamping blocks 241 are arranged in multiple groups around. It can be understood that the through strip holes 232 and the mounting openings 233 are also provided with multiple groups corresponding thereto.

[0054] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for automatic double-end face grinding of a ceramic tubular workpiece, characterized in that The utility model relates to a kind of pipe grinding machine, including: Rack (100); Clamping drive assembly for clamping tubular workpiece (101) and driving tubular workpiece to rotate along its axis; Sliding seat (200), it is provided with two and is located at the left and right sides of clamping drive assembly respectively, it is slidably installed in rack (100) along left and right direction, to be close to or away from tubular workpiece (101);Two first rotation drive mechanisms (210) are installed on two sliding seats (200), and the opposite side of two first rotation drive mechanisms (210) is equipped with rotation output end, and the rotation output end is connected with grinding disc (300); Feed drive mechanism (400) for driving sliding seat (200) to slide along left and right direction; The rotation output end is connected with connecting seat (220), and the end away from the rotation output end of connecting seat (220) is installed with mounting seat (230), and the grinding disc (300) can be detachably installed on the outer end surface of mounting seat (230); The outer end of mounting seat (230) is equipped with center hole (231), and the grinding disc (300) is equipped with embedding portion (310) embedded in center hole (231), and the embedding portion (310) and center hole (231) are profiled to realize torque transmission, and the inner end of embedding portion (310) is equipped with cylindrical portion (313), and the circumferential wall of cylindrical portion (313) is equipped with detent protrusion (311), and detent protrusion (311) and embedding portion (310) form detent gap (312) between them;Mounting seat (230) is rotatably sleeved with detent ring (240) on its outer periphery, and detent ring (240) is equipped with detent block (241) penetrating the circumferential wall of mounting seat (230) and embedded in center hole (231), and the circumferential wall of mounting seat (230) is equipped with through strip-shaped hole (232) for the rotational movement of detent block (241);Detent ring (240) has first state and second state, and the detent block (241) on the detent ring (240) in the first state is embedded in detent gap (312), and the detent block (241) on the detent ring (240) in the second state is staggered with detent gap (312);Elastic positioning column (250) is elastically movably installed on the outer peripheral wall of connecting seat (220), and the outer peripheral wall of detent ring (240) is equipped with detent opening (242);Elastic positioning column (250) can be embedded in the detent opening (242) on the detent ring (240) in the first state under the action of elastic force.

2. The apparatus according to claim 1, wherein The utility model relates to a kind of pipe grinding machine, including: Support limiting roller (500), it is provided with two in front and back direction interval, for supporting tubular workpiece (101); Second rotation drive mechanism for driving support limiting roller (500) to rotate movably, and the rotation direction of two support limiting rollers (500) is identical; Lifting drive mechanism (600) has movable end (610) that can be lifted movably, and the movable end (610) is installed with the compression positioning roller (620) that can rotate movably along its axis.

3. The apparatus according to claim 2, wherein The second rotating drive mechanism is a motor, an output shaft of the motor is connected with a gear transmission box (700), the gear transmission box (700) has an output driving shaft extending to the outside, a transmission wheel (710) is installed on the output driving shaft, one end of the central shaft of the two supporting limiting rollers (500) is connected with a driven wheel (720), and the transmission wheel (710) is in transmission connection with the two driven wheels (720).

4. The apparatus according to claim 1, wherein The grinding disc (300) is annular.

5. The apparatus according to claim 1, wherein The through strip-shaped hole (232) is provided with a mounting entrance (233) which is arranged in a staggered manner with the clamping gap (312) and is open at one end of the connecting seat (220).

6. The apparatus according to claim 1, wherein The outer peripheral wall of the connecting seat (220) is provided with a mounting plate (221), the mounting plate (221) is provided with a through hole (222), the elastic positioning column (250) comprises a central rod (251) which is slidably arranged in the through hole (222), one end of the central rod (251) towards the clamping ring (240) is provided with an insertion column (252) which is used for inserting into the clamping opening (242), the other end of the central rod (251) passes through the mounting plate (221) and is connected with a nut (253), the insertion column (252) is sleeved with a compression spring (254), and the two ends of the compression spring (254) are respectively abutted with the insertion column (252) and the mounting plate (221).

7. The apparatus according to claim 1, wherein The adjusting plate (110) is slidably arranged on the rack (100) in the front-rear direction, the feeding drive mechanism (400) is arranged on the adjusting plate (110), and the sliding seat (200) is slidably arranged on the adjusting plate (110) in the left-right direction.

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