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

Abstract

The invention discloses a double-face automatic grinding device for the end face of a ceramic tubular workpiece. The clamping driving assembly is used for clamping the tubular workpiece and driving the tubular workpiece to rotate along the axis of the tubular workpiece; the two sliding seats are located on the left side and the right side of the clamping driving assembly correspondingly and installed on the rack in a sliding mode in the left-right direction so as to be close to or away from the tubular workpiece; the two sliding seats are each provided with a first rotary driving mechanism, the opposite sides of the two first rotary driving mechanisms are each provided with a rotary output end, and the rotary output ends are connected with a grinding disc. And the feeding driving mechanism is used for driving the sliding seat to slide in the left-right direction. By the adoption of the double-face automatic grinding device, double-face synchronous grinding of the end face of the ceramic tubular workpiece is achieved, and compared with a traditional single-face grinding process, the machining efficiency is remarkably improved. Due to the fact that the two grinding discs grind the two end faces of the workpiece at the same time, the machining time is shortened by half, and the overall production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tubular workpiece grinding, in particular to a ceramic tubular workpiece end face double-sided automatic grinding device. Background Art

[0002] With the rapid development of the industrial ceramics industry, the demand for ceramic tubular and rod-shaped parts is increasing, and the requirements for dimensional accuracy are also getting higher and higher. This high-precision demand has promoted the demand for efficient and precision grinding technology; at present, the end face grinding of ceramic tube and rod workpieces mostly uses surface grinders, which rely on manual clamping of the workpiece in the fixture and then place it on the grinder workbench for single-sided grinding. After grinding one end face, the workpiece needs to be turned over and the other end face needs to be ground. This production method has high labor intensity, low production efficiency and high production cost. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a ceramic tubular workpiece end surface double-sided automatic grinding device.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A double-sided automatic grinding device for the end face of a ceramic tubular workpiece comprises: a frame; a clamping drive assembly, used for clamping the tubular workpiece and driving the tubular workpiece to rotate along its own axis; a sliding seat, which is provided with two and is respectively located on the left and right sides of the clamping drive assembly, and is slidably installed on the frame along the left and right directions to approach or move away from the tubular workpiece; a first rotation drive mechanism is installed on each of the two sliding seats, and a rotation output end is provided on the opposite sides of the two first rotation drive mechanisms, and the rotation output end is connected to a grinding disc; a feed drive mechanism is used to drive the sliding seat to slide along the left and right directions.

[0006] Furthermore, the clamping drive assembly includes: two supporting and limiting rollers, which are arranged at intervals along the front-to-back direction and are used to support the tube-shaped workpiece; a second rotation drive mechanism, which is used to drive the supporting and limiting rollers to rotate, and the two supporting and limiting rollers have the same rotation direction; a lifting and lowering drive mechanism, which has a movable end that can be lifted and lowered, and the movable end is equipped with a clamping positioning roller that can rotate along its own axis.

[0007] Furthermore, the second rotating drive mechanism is a motor, the output shaft of the motor is connected to a gear transmission box, the gear transmission box has an output driving shaft extending to the outside, a transmission wheel is installed on the output driving shaft, one end of the central axis of the two supporting and limiting rollers is connected to a driven wheel, and the transmission wheel is connected to the two driven wheels in a transmission manner.

[0008] Furthermore, the grinding disc is ring-shaped.

[0009] Furthermore, the grinding disc is detachably connected to the rotating output end.

[0010] Furthermore, the rotary output end is connected to a connecting seat, an end of the connecting seat away from the rotary output end is installed with a mounting seat, and the grinding disc is detachably mounted on an outer end surface of the mounting seat.

[0011] Furthermore, a center hole is provided at the outer end of the mounting seat, and the grinding disc is provided with an embedding portion embedded in the center hole, and the embedding portion is adapted to the contour of the center hole to realize torque transmission, and a cylindrical portion is provided at the inner end of the embedding portion, and a locking protrusion is provided on the peripheral wall of the cylindrical portion, and a locking gap is formed between the locking protrusion and the embedding portion; a locking ring is provided on the outer peripheral rotation sleeve of the mounting seat, and the locking ring is provided with a locking block that penetrates the peripheral wall of the mounting seat and is embedded in the center hole, and the peripheral wall of the mounting seat is provided with a through strip hole for the locking block to rotate; the locking ring has a first state and a second state, the locking block on the locking ring in the first state is embedded in the locking gap, and the locking block on the locking ring in the second state is staggered with the locking gap; an elastic positioning column is elastically and movably installed on the outer peripheral wall of the connecting seat, and a locking opening is provided on the outer peripheral wall of the locking ring; the elastic positioning column can be embedded in the locking opening on the locking ring in the first state under the action of elastic force.

[0012] Furthermore, the through bar-shaped hole is provided with an installation entrance which is staggered with the clamping gap, and the installation entrance is opened toward one end of the connecting seat.

[0013] Furthermore, a mounting plate is provided on the outer peripheral wall of the connecting seat, a through hole is provided on the mounting plate, and the elastic positioning column includes a center rod slidably passed through the through hole, an insertion column for inserting into the locking port is provided at one end of the center rod facing the locking ring, and the other end passes through the mounting plate and is connected to a nut, a compression spring is sleeved on the insertion column, and both ends of the compression spring are respectively against the insertion column and the mounting plate.

[0014] Furthermore, an adjustment plate is slidably mounted on the frame along the front-rear direction, the feed drive mechanism is mounted on the adjustment plate, and the sliding seat is slidably mounted on the adjustment plate along the left-right direction.

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

[0016] By adopting a double-sided automatic grinding device, the double-sided synchronous grinding of the end face of the ceramic tubular workpiece is achieved, which significantly improves the processing efficiency compared to the traditional single-sided grinding process. Since the two grinding discs grind the two end faces of the workpiece at the same time, 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 its own axis, ensuring the uniformity of the grinding process. The design of the sliding seat allows the two grinding discs to be independently controlled, improving the flexibility and utilization of the equipment.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

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

[0020] Figure 2 yes Figure 1 A magnified view of point A;

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

[0022] Figure 4 It is a partial structural schematic diagram of the present invention;

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

[0024] Figure 6 yes Figure 5 A cross-sectional view of

[0025] Figure 7 yes Figure 5 Schematic diagram of the decomposed state structure;

[0026] Figure 8 yes Figure 7 A structural diagram from another perspective;

[0027] Fig. 9 It is a schematic diagram of the structure of the disassembled state of the retaining ring and the mounting seat.

[0028] Legend:

[0029] A frame 100, a tubular workpiece 101, and an adjustment plate 110;

[0030] Sliding seat 200, first rotary drive mechanism 210, connecting seat 220, mounting plate 221, through hole 222, positioning groove 223, mounting seat 230, center hole 231, through bar hole 232, mounting entrance 233, positioning protrusion 234, positioning ring 240, positioning block 241, positioning opening 242, elastic positioning column 250, center rod 251, plug column 252, nut 253, compression spring 254;

[0031] Grinding disc 300, embedded portion 310, positioning protrusion 311, positioning gap 312, cylindrical portion 313;

[0032] Feed drive mechanism 400;

[0033] Supporting limit roller 500;

[0034] Lifting drive mechanism 600, movable end 610, pressing and 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 only used to explain the present invention, and are not used to limit the present invention.

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] Please refer to Figures 1 to 3 A preferred embodiment of the present invention provides a ceramic tubular workpiece end double-sided automatic grinding device, which includes a frame 100, a clamping drive assembly, a sliding seat 200, a grinding disc 300 and a feed drive mechanism 400.

[0041] The clamping drive assembly is used to clamp the tubular workpiece 101 and drive the tubular workpiece to rotate along its own axis. Two sliding seats 200 are provided and are respectively located on the left and right sides of the clamping drive assembly. The sliding seat 200 is slidably installed on the frame 100 along the left and right directions to approach or move away from the tubular workpiece 101; the two sliding seats 200 are both installed with a first rotary drive mechanism 210, and the opposite sides of the two first rotary drive mechanisms 210 are both provided with a rotary output end, and the rotary output end is connected to the grinding disc 300. The feed drive mechanism 400 is used to drive the sliding seat 200 to slide along the left and right directions. The first rotary drive mechanism 210 can be a motor, and the rotary output end is the rotary output shaft of the motor. The feed drive mechanism 400 can be a motor, and the output shaft of the motor is connected to the screw rod, and the sliding seat 200 is installed with a nut pair adapted to the screw rod, so as to realize the sliding drive of the sliding seat 200. It can be understood that the device will be equipped with a detection mechanism for use, and the detection mechanism detects the positions of the two end faces of the tubular workpiece 101 to determine the feeding distance.

[0042] The present invention provides a double-sided automatic grinding device for the end face of a ceramic tubular workpiece. By adopting a double-sided automatic grinding device, the double-sided synchronous grinding of the end face of the ceramic tubular workpiece is achieved, which significantly improves the processing efficiency compared to the traditional single-sided grinding process. Since the two grinding discs 300 grind the two end faces of the workpiece at the same time, 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 its own axis, ensuring the uniformity of the grinding process. The design of the sliding seat 200 allows the two grinding discs 300 to be independently controlled, improving the flexibility and utilization of the equipment.

[0043] Reference Figure 2 In a specific embodiment of the present invention, the clamping drive assembly includes a supporting and limiting roller 500, a second rotation drive mechanism and a lifting drive mechanism 600. Two supporting and limiting rollers 500 are arranged at intervals along the front-to-back direction, which are used to support the tubular workpiece 101 and can be adapted to tubular workpieces 101 of different specifications. The second rotation drive mechanism is used to drive the supporting and limiting rollers 500 to rotate, 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 that can be lifted and lowered, and the lifting drive mechanism 600 can be a cylinder or a hydraulic cylinder. The movable end 610 is equipped with a clamping and positioning roller 620 that can rotate along its own axis. During processing, the lifting drive mechanism 600 drives the movable end 610 and the clamping and positioning roller 620 to descend, and clamps the tubular workpiece 101 on the supporting and limiting roller 500 to achieve clamping of the workpiece, and makes the supporting and limiting roller 500 in close contact with the tubular workpiece 101, and there is sufficient friction to drive the tubular workpiece 101 to rotate.

[0044] Reference Figure 4In a further embodiment of the present invention, the second rotary drive mechanism is a motor, the output shaft of the motor is connected to a gear transmission box 700, the gear transmission box 700 has an output driving shaft extending to the outside, and a gear set is arranged inside the gear transmission box 700, which has an input gear and an output gear, and the input gear and the output gear are directly connected or transmitted through an additional gear; the central axis of the input gear is connected to the output shaft of the motor, and the central axis of the output gear is the output driving shaft. A transmission wheel 710 is installed on the output driving shaft, and the transmission wheel 710 rotates synchronously with the output driving shaft. One end of the central axis of the two supporting and limiting rollers 500 is connected to a driven wheel 720, and the driven wheel 720 rotates synchronously with the central axis of the corresponding supporting and limiting roller 500. The transmission wheel 710 is connected to the two driven wheels 720 in transmission, and specifically, the transmission wheel 710 and the two driven wheels 720 are transmitted through the same belt, and the transmission wheel 710 and the two driven wheels 720 are both pulleys.

[0045] In some embodiments of the present invention, the grinding wheel 300 is annular, which can reduce the contact area between the grinding wheel 300 and the tubular workpiece 101. If a solid grinding wheel is used, there will be a large waste of material. The rotation of the grinding wheel 300 can enable the annular end surface of the grinding wheel 300 to be ground, thereby maximizing material utilization and reducing the replacement cost of the grinding wheel 300.

[0046] Reference Figure 1 In a further embodiment of the present invention, an adjustment plate 110 is slidably mounted on the frame 100 along the front-to-back direction, a feed drive mechanism 400 is mounted on the adjustment plate 110, and a sliding seat 200 is slidably mounted on the adjustment plate 110 along the left-right direction. Thus, the front-to-back position of the grinding disc 300 is adjusted by the front-to-back movement of the adjustment 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, thereby improving the application range of the device. Specifically, the adjustment plate 110 can be driven to move forward and backward by a manual drive crank or a drive motor, a nut seat is provided at the bottom of the adjustment plate 110, and a screw rod is connected to the manual drive crank or the drive motor, and the screw rod is adapted to the nut seat to realize the movement and adjustment of the adjustment plate 110.

[0047] In a further embodiment of the present invention, the grinding disc 300 is detachably connected to the rotating output end, so that the grinding disc 300 can be replaced separately after severe wear, thereby reducing maintenance costs.

[0048] Reference Figures 5 to 9 In a further embodiment of the present invention, the rotating output end is connected to a connecting seat 220, and the connecting seat 220 and the rotating output end can be connected and fixed by welding, integral molding or fasteners. A mounting seat 230 is installed at one end of the connecting seat 220 away from the rotating output end, and the grinding disc 300 can be detachably mounted on the outer end surface of the mounting seat 230.

[0049] Reference Figures 5 to 9In a further embodiment of the present invention, a center hole 231 is provided at the outer end of the mounting seat 230, and the outer end of the mounting seat 230 is the end facing away from the rotation output end. The grinding disc 300 is provided with an embedding portion 310 embedded in the center hole 231, and the embedding portion 310 is adapted to the contour of the center hole 231 to achieve torque transmission. Specifically, the cross-sectional contours of the embedding portion 310 and the center hole 231 are both regular polygons, so that the embedding portion 310 is embedded in the center hole 231 to achieve torque transmission and synchronous rotation of the mounting seat 230 and the grinding disc 300, and to achieve the center positioning and circumferential positioning of the grinding disc 300. A cylindrical portion 313 is provided at the inner end of the embedding portion 310, and the inner end of the embedding portion 310 is the end facing the rotation output end. A locking protrusion 311 is provided on the peripheral wall of the cylindrical portion 313, and a locking gap 312 is formed between the locking protrusion 311 and the embedded portion 310. A locking ring 240 is rotatably sleeved on the outer periphery of the mounting seat 230. The locking ring 240 is provided with a locking block 241 that passes through the peripheral wall of the mounting seat 230 and is embedded in the center hole 231. The peripheral wall of the mounting seat 230 is provided with a through bar hole 232 for the locking block 241 to rotate. The locking block 241 passes through the peripheral wall of the mounting seat 230 and is embedded in the center hole 231 by being penetrated by the through bar hole 232. The through bar hole 232 is an arc-shaped bar hole, so that the locking block 241 can move in the through bar hole 232 without interference when the locking ring 240 rotates. The locking ring 240 has a first state and a second state. The locking ring 240 rotates along the peripheral wall of the mounting seat 230 to achieve state switching. Figure 5 and Figure 6 As shown, the blocking block 241 on the blocking ring 240 in the first state is embedded in the blocking gap 312, thereby realizing the axial limit of the grinding disc 300, so that the position of the grinding disc 300 is fixed. The blocking block 241 on the blocking ring 240 in the second state is staggered with the blocking gap 312, so that the axial limit of the grinding disc 300 cannot be performed, so that the grinding disc 300 can be removed. The outer peripheral wall of the connecting seat 220 is elastically and movably installed with an elastic positioning column 250, and the outer peripheral wall of the blocking ring 240 is provided with a blocking opening 242; the elastic positioning column 250 can be embedded in the blocking opening 242 on the blocking ring 240 in the first state under the action of elastic force, thereby limiting the blocking ring 240, so that the blocking ring 240 cannot rotate and realizes state switching, so that the blocking ring 240 remains in the first state, realizing stable limit of the grinding disc 300, and making the position of the grinding disc 300 stable and reliable. The mounting seat 230 provides enough installation space for the elastic positioning column 250.

[0050] Reference Figures 7 to 9In a further embodiment of the present invention, an installation entrance 233 is provided on the through-strip hole 232, which is staggered with the locking gap 312, and the installation entrance 233 is opened toward one end of the connecting seat 220, so that when the locking ring 240 is installed and removed, the locking block 241 can enter or exit the through-strip hole 232 from the installation entrance 233. When the locking ring 240 is in the first state, it can block the through-strip hole 232 and the installation entrance 233. After the connecting seat 220 is connected to the mounting seat 230, the connecting seat 220 will block the opening of the installation entrance 233, and the locking ring 240 will not be able to detach from the mounting seat 230. In the second state, the locking block 241 of the locking ring 240 is aligned with the installation entrance 233, as shown in FIG. Fig. 9 As shown, after the retaining ring 240 reaches the second state, the retaining block 241 can be separated from the mounting seat 230 from the installation entrance 233, thereby achieving separation from the mounting seat 230 and achieving disassembly. In order to facilitate the judgment that the retaining ring 240 reaches the first state and the second state, the retaining block 241 reaches the first state and the second state respectively when it fits with the two end walls of the through-bar hole 232. That is, when it is necessary to switch the state, the retaining ring 240 is directly rotated toward the other end of the through-bar hole 232 until it abuts against and fits with the end wall of the other end of the through-bar hole 232, that is, it is switched to another state, which is convenient for operation, and there is no need to judge whether the retaining 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, and the connecting seat 220 is provided with a positioning groove 223, and 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 holes to be connected and fixed by fasteners. The independent design and detachable connection of the connecting seat 220 and the mounting seat 230 facilitates the installation and removal of the retaining ring 240 and avoids the installation inlet 233 being too long.

[0051] Of course, in some other embodiments, the connecting seat 220 and the mounting seat 230 are connected as one piece, and the mounting inlet 233 extends to the end surface of the connecting seat 220 facing away from the mounting seat 230 .

[0052] Reference Figure 6 and Figure 7In a further embodiment of the present invention, a mounting plate 221 is provided on the outer peripheral wall of the connection seat 220, and a through hole 222 is provided on the mounting plate 221. The elastic positioning column 250 includes a center rod 251 that is slidably penetrated in the through hole 222. The center rod 251 is adapted to the contour of the through hole 222 to play a guiding and centering role. The end of the center rod 251 facing the locking ring 240 is provided with a plug column 252 for inserting into the locking port 242, and the other end 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 the nut 253 to be threadedly connected, so that the movable stroke of the elastic positioning column 250 is limited by the contour of the nut 253 being larger than the through hole 222, so as to prevent the center rod 251 from being separated from the through hole 222. A compression spring 254 is sleeved on the plug column 252, and the two ends of the compression spring 254 are respectively against the plug column 252 and the mounting plate 221, and the diameter of the plug column 252 is larger than the center rod 251. Thereby, the elastic positioning column 250 is elastically installed, and the plug column 252 is kept in the state of being inserted into the locking opening 242 under the force of the compression spring 254. When the state of the locking ring 240 needs to be switched, the plug column 252 only needs to be pulled out of the locking opening 242 and then the locking ring 240 is rotated.

[0053] In order to achieve multi-position limiting and avoid stress concentration, the locking protrusions 311 and the locking blocks 241 are arranged in multiple groups around. It can be understood that the through-bar holes 232 and the installation entrances 233 are also correspondingly provided with multiple groups.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-sided automatic grinding device for the end surface of a ceramic tubular workpiece, characterized in that: include: Rack(100); A clamping drive assembly, used for clamping a tubular workpiece (101) and driving the tubular workpiece to rotate along its own axis; Two sliding seats (200) are provided and are respectively located on the left and right sides of the clamping drive assembly, and are slidably mounted on the frame (100) along the left and right directions so as to approach or move away from the tubular workpiece (101); a first rotary drive mechanism (210) is mounted on each of the two sliding seats (200), and a rotary output end is provided on the opposite sides of the two first rotary drive mechanisms (210), and the rotary output end is connected to a grinding disc (300); The feeding drive mechanism (400) is used to drive the sliding seat (200) to slide in the left-right direction.

2. The double-sided automatic grinding device for the end surface of a ceramic tubular workpiece according to claim 1 is characterized in that: The clamping drive assembly comprises: Two supporting and limiting rollers (500) are arranged at intervals along the front-to-back direction and are used to support the tube-shaped workpiece (101); A second rotation driving mechanism is used to drive the supporting and limiting rollers (500) to rotate, and the two supporting and limiting rollers (500) rotate in the same direction; The lifting drive mechanism (600) has a movable end (610) capable of lifting and lowering, and the movable end (610) is provided with a clamping positioning roller (620) capable of rotating and moving along its own axis.

3. The double-sided automatic grinding device for the end surface of a ceramic tubular workpiece according to claim 2 is characterized in that: The second rotary drive mechanism is a motor, the output shaft of the motor is connected to a gear transmission box (700), the gear transmission box (700) has an output drive shaft extending to the outside, a transmission wheel (710) is installed on the output drive shaft, one end of the central axis of the two supporting and limiting rollers (500) is connected to a driven wheel (720), and the transmission wheel (710) is connected to the two driven wheels (720) in a transmission manner.

4. The double-sided automatic grinding device for the end surface of a ceramic tubular workpiece according to claim 1, characterized in that: The grinding disc (300) is ring-shaped.

5. The double-sided automatic grinding device for the end surface of a ceramic tubular workpiece according to claim 4, characterized in that: The grinding disc (300) is detachably connected to the rotating output end.

6. The double-sided automatic grinding device for the end surface of a ceramic tubular workpiece according to claim 5, characterized in that: The rotary output end is connected to a connecting seat (220), an end of the connecting seat (220) facing away from the rotary output end is mounted with a mounting seat (230), and the grinding disc (300) is detachably mounted on the outer end surface of the mounting seat (230).

7. The double-sided automatic grinding device for the end surface of a ceramic tubular workpiece according to claim 6, characterized in that: The outer end of the mounting seat (230) is provided with a center hole (231), the grinding disc (300) is provided with an embedded portion (310) embedded in the center hole (231), the embedded portion (310) is adapted to the contour of the center hole (231) to achieve torque transmission, the inner end of the embedded portion (310) is provided with a cylindrical portion (313), the peripheral wall of the cylindrical portion (313) is provided with a locking protrusion (311), and a locking gap (312) is formed between the locking protrusion (311) and the embedded portion (310); the outer periphery of the mounting seat (230) is provided with a locking ring (240), and the locking ring (240) is provided with a locking block (241) that penetrates the peripheral wall of the mounting seat (230) and is embedded in the center hole (231). ), the peripheral wall of the mounting seat (230) is provided with a through bar-shaped hole (232) for the locking block (241) to rotate; the locking ring (240) has a first state and a second state, the locking block (241) on the locking ring (240) in the first state is embedded in the locking gap (312), and the locking block (241) on the locking ring (240) in the second state is staggered with the locking gap (312); the outer peripheral wall of the connecting seat (220) is elastically and movably installed with an elastic positioning column (250), and the outer peripheral wall of the locking ring (240) is provided with a locking opening (242); the elastic positioning column (250) can be embedded in the locking opening (242) on the locking ring (240) in the first state under the action of elastic force.

8. The double-sided automatic grinding device for the end surface of a ceramic tubular workpiece according to claim 7, characterized in that: The through-bar hole (232) is provided with an installation entrance (233) staggered with the locking gap (312), and the installation entrance (233) is opened toward one end of the connecting seat (220).

9. The double-sided automatic grinding device for the end surface of a ceramic tubular workpiece according to claim 7, characterized in that: 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) slidably penetrated in the through hole (222), and one end of the center rod (251) facing the locking ring (240) is provided with a plug column (252) for inserting into the locking opening (242), and the other end passes through the mounting plate (221) and is connected with a nut (253), and a compression spring (254) is sleeved on the plug column (252), and the two ends of the compression spring (254) are respectively against the plug column (252) and the mounting plate (221).

10. The double-sided automatic grinding device for the end surface of a ceramic tubular workpiece according to claim 7, characterized in that: An adjustment plate (110) is slidably mounted on the frame (100) in the front-rear direction, the feed drive mechanism (400) is mounted on the adjustment plate (110), and the sliding seat (200) is slidably mounted on the adjustment plate (110) in the left-right direction.

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