Multi-station automatic polishing machine

Abstract

The invention relates to the technical field of polishing machines, in particular to a multi-station automatic polishing machine. According to the technical scheme, a machining frame is included; the processing barrel is fixedly connected to the processing frame; the inner cylinder is rotationally connected into the processing cylinder; the first driving assembly is arranged between the processing cylinder and the inner cylinder; a vertical notch groove is formed in the inner wall of the inner cylinder; the cylinder cover covers the top of the processing cylinder; the second driving assembly is arranged between the processing cylinder and the cylinder cover; the guide column is arranged in the inner cylinder; the mounting sleeve is fixedly arranged on the bottom surface of the barrel cover; the at least three groups of clamping units are uniformly distributed along the periphery of the mounting sleeve; by means of the clamping unit which can move in a lifting mode and can be locked through air pressure, after one polishing procedure is completed, the clamping unit is controlled to integrally ascend, and a workpiece is rapidly and completely separated from an abrasive area, so that the steps of repeated screening and cleaning are omitted, rapid and thorough separation of the workpiece and abrasive is achieved, the procedure connection time is greatly shortened, and the polishing efficiency is improved. And the efficiency and the automation degree of continuous operation are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polishing machines, in particular to a multi-station automatic polishing machine. BACKGROUND

[0002] An automatic polishing machine is an automatic equipment for surface finishing, which realizes the processing purposes of removing burrs, reducing roughness and improving smoothness by using polishing media such as abrasives to move relative to the surface of the workpiece.

[0003] In the polishing process, in order to achieve the ideal surface quality, it is usually necessary to sequentially perform multiple polishing processes in the order of abrasives from coarse to fine, i.e., the workpiece is first polished in a station equipped with coarse abrasives to quickly remove macroscopic unevenness, then transferred to a station equipped with finer abrasives to eliminate the scratches left by the previous process, and so on, until the finest abrasives are used to achieve the final fine polishing. This process results in the need to remove all workpieces in the current station one by one from the mixed abrasives when a polishing process is completed and finer abrasives are replaced, which is a tedious and time-consuming process that limits the further optimization of the overall processing efficiency and automation level of the equipment. SUMMARY

[0004] The present application provides a multi-station automatic polishing machine that realizes rapid separation of abrasives and workpieces, aiming to improve the overall processing efficiency and automation level of the equipment.

[0005] Technical solution: A multi-station automatic polishing machine, comprising: a processing rack; a processing cylinder fixedly connected to the processing rack; an inner cylinder rotatably connected inside the processing cylinder, the bottom surface of which is inclined towards the center to form a concave structure; a first drive assembly provided between the processing cylinder and the inner cylinder, used to drive the inner cylinder to rotate to drive the abrasives to polish the workpiece; a vertical notch is provided on the inner wall of the inner cylinder to promote the flow and rolling of the abrasives; a cylinder cover covers the top of the processing cylinder to seal the internal space of the processing cylinder; a second drive assembly is provided between the processing cylinder and the cylinder cover to drive the cylinder cover to open and close the processing cylinder; a guide column is provided in the inner cylinder; an installation sleeve is fixedly provided on the bottom surface of the cylinder cover and slidably covers the outside of the guide column; a discharge assembly is provided at the center of the bottom of the inner cylinder to quickly discharge the abrasives; and at least three groups of clamping units are uniformly arranged along the outer periphery of the installation sleeve to clamp the workpiece. Each group of clamping units comprises: a clamping fixed end fixed outside the mounting sleeve; a connecting pipe fixedly connected outside the mounting sleeve; a piston sleeve fixedly connected to the connecting pipe, the piston sleeve being in communication with the inside of the connecting pipe; a clamping movable end sliding along the end of the piston sleeve; a piston head sliding along the inside of the connecting pipe; a control assembly provided on the mounting sleeve, used to drive the piston head to move, so as to control the clamping movable end to cooperate with the clamping fixed end to clamp the workpiece; and a reset spring provided outside the clamping movable end, the two ends of the reset spring being fixed on the clamping movable end and the piston sleeve respectively.

[0006] In addition, it is particularly preferred that the surfaces of the clamping fixed end and the clamping movable end, which are in contact with the workpiece, are provided with friction lines for increasing the friction.

[0007] In addition, it is particularly preferred that the first driving assembly comprises: a transmission gear ring fixedly connected to the bottom surface of the inner cylinder; a first motor fixedly connected to the machining rack; and a driving gear fixedly connected to the output end of the first motor, the driving gear being engaged with the transmission gear ring.

[0008] In addition, it is particularly preferred that the second driving assembly comprises: at least two threaded rods threadedly connected to the inner wall of the machining cylinder, the threaded rods being rotatably connected to the cylinder cover; a second motor fixedly connected to the top of the cylinder cover, the second motor being in transmission connection with one of the threaded rods; and a transmission member provided between any two threaded rods, the transmission member being used to drive all the threaded rods to rotate synchronously.

[0009] In addition, it is particularly preferred that the guide column is rotatably connected to the inner cylinder; the control assembly comprises: a contact disc slidingly provided in the mounting sleeve, the contact disc being in contact with the top of the guide column when the mounting sleeve moves downward relative to the guide column; and a connecting unit provided between the contact disc and the piston head, the number and positions of the connecting unit corresponding to the number and positions of the groups of clamping units one by one. The outer periphery of the connecting pipe and the mounting sleeve is provided with a limiting groove; each group of connecting units comprises: a control seat slidingly connected outside the mounting sleeve through the limiting groove, the control seat being fixedly connected with the contact disc; a moving seat slidingly connected outside the connecting pipe through the limiting groove, the moving seat being fixedly connected with the piston head; and a hinged rod rotatably connected between the control seat and the moving seat.

[0010] In addition, it is particularly preferred that the device further comprises: a through pipe fixedly connected to the cylinder cover, the through pipe penetrating the machining cylinder from top to bottom; a suction device fixedly connected to the through pipe, the suction device being used to generate negative pressure to remove the polishing debris generated in the polishing process; a docking nozzle fixedly connected to the top of the through pipe, the docking nozzle being used to connect an external debris removal pipeline to collect the polishing debris in a directional manner; and an air inlet window fixedly connected to the cylinder cover, the air inlet window being used to balance the air pressure inside and outside the machining cylinder.

[0011] In addition, it is particularly preferred that the inner cylinder bottom is provided with a refilling opening, the refilling opening is connected to the outside of the processing cylinder, the discharging assembly comprises a mounting ring fixedly connected to the outside of the inner cylinder bottom, a blocking block embedded in the refilling opening for closing the refilling opening, and a bolt provided between the mounting ring and the blocking block, the bolt is rotationally connected with the blocking block and threadedly cooperated with the mounting ring.

[0012] In addition, it is particularly preferred that the inner cylinder bottom is provided with a refilling opening, the refilling opening is connected to the outside of the processing cylinder, the discharging assembly comprises a mounting ring fixedly connected to the outside of the inner cylinder bottom, a blocking block embedded in the refilling opening for closing the refilling opening, and a bolt provided between the mounting ring and the blocking block, the bolt is rotationally connected with the blocking block and threadedly cooperated with the mounting ring.

[0013] Compared with the prior art, the present application has the following advantages: the present application can quickly and conveniently replace the abrasive and enter the next polishing process without any screening operation by lifting the clamping unit as a whole to quickly separate the workpiece from the abrasive area after completing a polishing process; therefore, the present application can realize quick and complete separation of the workpiece and the abrasive, greatly shorten the process connection time, improve the efficiency and automation degree of continuous operation, and avoid the inconvenience and time-consuming operation caused by traditional screening.

[0014] The first driving assembly drives the rotation of the inner cylinder, which can ensure uniform and controllable rotation speed of the inner cylinder, realize uniform and continuous polishing of the abrasive relative to the workpiece, and ensure the stability of the polishing process and the consistency of the processed surface; the second driving assembly drives the stable lifting of the cylinder cover in the vertical direction, which can stably control the opening and closing of the processing cylinder.

[0015] The control assembly can automatically lock when the workpiece enters the polishing operation area, without the need for separate locking steps, thereby improving the automation degree and operation efficiency of the present application; and for workpieces of different sizes, the reset spring can provide adaptive compensation during the locking process, which not only ensures the reliability of clamping and the normal operation of the control assembly, but also enhances the adaptability of the present application to changes in the size of the workpiece.

[0016] The suction device synchronously removes the polishing dust during the polishing process, and the material stirring and dispersion of the polishing operation itself make the polishing dust more easily separated from the abrasive and removed by suction, effectively reducing the subsequent cleaning burden and improving the cleanliness of the working environment and the stability of continuous processing of the present application.

[0017] The thread locking and silica gel sealing in the refilling assembly can ensure the airtightness of the discharging opening while realizing quick discharge and replacement of the abrasive, facilitating efficient switching between different polishing processes of different particle sizes. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0019] Figure 2 The internal structure of the processing cylinder and the inner cylinder after being partially cut open.

[0020] Figure 3 The structure of the cylinder cover, mounting sleeve and clamping unit when moving up.

[0021] Figure 4 The position structure of the clamping unit in the inner cylinder.

[0022] Figure 5 The connection structure of the guide column, mounting sleeve and clamping unit.

[0023] Figure 6 The position structure of the clamping unit and the connecting unit.

[0024] Figure 7 The connection structure of the clamping unit and the connecting unit.

[0025] Figure 8 The connection structure of the clamping unit and the connecting unit.

[0026] In the figure: 010, processing frame, 020, processing cylinder, 030, cylinder cover, 040, inner cylinder, 050, notch, 061, transmission gear ring, 062, first motor, 063, driving gear, 071, threaded rod, 072, second motor, 073, transmission part, 074, first transmission gear set, 075, spacer ring, 110, guide column, 120, mounting sleeve, 130, clamping fixed end, 140, piston sleeve, 150, clamping movable end, 151, hook rod, 160, connecting pipe, 170, piston head, 180, return spring, 190, friction pattern, 210, contact disc, 220, control seat, 221, limiting groove, 230, moving seat, 240, hinged rod, 310, through pipe, 320, suction device, 321, negative pressure wheel, 322, third motor, 323, second transmission gear set, 330, docking nozzle, 340, air inlet window, 410, mounting ring, 420, plugging block, 421, plug, 430, bolt. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions and advantages of the present application clearer and more apparent, the present application will be further described in detail below with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0028] Embodiment: A multi-station automatic polishing machine, such as Figures 1-4As shown, the device comprises: a processing frame 010; a processing cylinder 020 fixedly installed on the processing frame 010; an inner cylinder 040 rotatably installed in the processing cylinder 020, the bottom surface of which is inclined to form a concave structure; a first driving assembly arranged between the processing cylinder 020 and the inner cylinder 040, used to drive the inner cylinder 040 to rotate to drive the abrasive to polish the workpiece; a vertical groove 050 arranged on the inner wall of the inner cylinder 040, used to promote the flow and rolling of the abrasive; a cylinder cover 030 covering the top of the processing cylinder 020, used to seal the internal space of the processing cylinder 020; a second driving assembly arranged between the processing cylinder 020 and the cylinder cover 030, used to drive the cylinder cover 030 to move in the vertical direction to realize the opening and closing of the processing cylinder 020; a guide column 110 arranged in the inner cylinder 040; a mounting sleeve 120 fixedly arranged on the bottom surface of the cylinder cover 030, which is slidingly sleeved outside the guide column 110; a discharge assembly arranged at the center of the bottom of the inner cylinder 040, used to quickly discharge the abrasive; and six groups of clamping units uniformly arranged along the outer periphery of the mounting sleeve 120, used to clamp the workpiece.

[0029] As shown in Figure 4 and Figure 5 each group of clamping units comprises: a clamping fixed end 130 fixed outside the mounting sleeve 120; a connecting pipe 160 fixedly installed outside the mounting sleeve 120; a piston sleeve 140 fixedly installed on the connecting pipe 160, the piston sleeve 140 being in communication with the inside of the connecting pipe 160; a clamping movable end 150 sliding in piston mode along the end of the piston sleeve 140, the change of air pressure in the piston sleeve 140 being fed back as the axial displacement of the clamping movable end 150 to cooperate with the clamping fixed end 130 to clamp the workpiece; a piston head 170 sliding in piston mode inside the connecting pipe 160; a control assembly arranged on the mounting sleeve 120, used to drive the piston head 170 to move along the connecting pipe 160; a reset spring 180 sleeved outside the clamping movable end 150, the two ends of which are fixed on the clamping movable end 150 and the piston sleeve 140 respectively; the surfaces of the clamping fixed end 130 and the clamping movable end 150 which contact the workpiece are provided with friction lines 190 for increasing the friction force to enhance the clamping stability; and a hook rod 151 fixedly installed on the clamping movable end 150, facilitating manual adjustment of the position of the clamping movable end 150; the inner surface of the inner cylinder 040 and the surfaces of the components installed therein are covered with protective film to reduce abrasive wear.

[0030] Firstly, the processing barrel 020 is opened by lifting the barrel cover 030 of the second driving assembly, the mounting sleeve 120 and the clamping unit thereon are lifted as a whole, the appropriate abrasive is added into the inner barrel 040, the workpiece is placed between the clamping movable end 150 and the clamping fixed end 130 by sliding the clamping movable end 150 through the hook rod 151, and the workpiece is preliminarily fixed by the reset pressure of the reset spring 180; after the clamping of each workpiece is completed, the barrel cover 030 is lowered to close the processing barrel 020, at this time, the mounting sleeve 120 drives the workpiece to descend into the inner barrel 040, then the control assembly is started to drive the piston head 170 to move and compress the gas in the piston sleeve 140, and the clamping movable end 150 is further driven to press the workpiece to lock the workpiece; subsequently, the first driving assembly is started to drive the inner barrel 040 to rotate, so that the abrasive moves relative to the workpiece to achieve polishing, until the polishing operation of this time is completed, the workpiece can be quickly separated from the abrasive by lifting the barrel cover 030, then the polishing operation of this mesh size is continued after the workpiece posture is switched, or the polishing of this mesh size is directly ended by discharging the current abrasive, and the above process is repeated after the abrasive of a finer mesh size is replaced, until the required surface quality is achieved, and finally the workpiece is unloaded.

[0031] The device can quickly and conveniently replace the abrasive to enter the next polishing process by lifting and moving the clamping unit and locking the clamping unit by air pressure, and the workpiece is completely separated from the abrasive area after completing a polishing process, without any screening operation.

[0032] As shown in Figure 2 and Figure 4 , the first driving assembly comprises a transmission gear ring 061 fixedly installed on the bottom surface of the inner barrel 040, a first motor 062 fixedly installed on the processing rack 010, and a driving gear 063 fixedly installed on the output end of the first motor 062 and engaged with the transmission gear ring 061. After the first motor 062 is started, the driving gear 063 and the transmission gear ring 061 form a gear transmission pair, which can transmit stable rotary driving force to the inner barrel 040, so as to drive the inner barrel 040 to stably rotate around its axis. The transmission structure can ensure that the rotation speed of the inner barrel 040 is uniform and controllable, realizes uniform and continuous polishing of the abrasive relative to the workpiece, and ensures the stability of the polishing process and the consistency of the processed surface.

[0033] As shown in Figures 1-4As shown, the second driving assembly includes: two threaded rods 071 threadedly installed on the inner wall of the processing cylinder 020, both of which are rotationally connected with the cylinder cover 030; a second motor 072 fixedly installed on the top of the cylinder cover 030, for optimizing the structural layout, the second motor 072 is transmissionally connected with one of the threaded rods 071 through a first transmission gear set 074, which is composed of two gears meshing with each other and fixed on the output end of the second motor 072 and the corresponding threaded rod 071, respectively; and a transmission member 073 arranged between the two threaded rods 071, which specifically adopts a transmission wheel and transmission belt assembly, including two transmission wheels fixed on the two threaded rods 071, respectively, and a transmission belt wrapped between the two transmission wheels, through the transmission member 073, the synchronous rotation of the two threaded rods 071 is realized, so as to drive the cylinder cover 030 to stably ascend and descend along the vertical direction, so as to control the opening and closing of the processing cylinder 020.

[0034] As shown in Figure 2 , Figure 6 and Figure 7 , the guide column 110 is rotationally installed in the inner cylinder 040 through the leg, and the guide column 110 and the leg are connected through a bearing, so that the guide column 110 can smoothly rotate around its axis; the control assembly includes: a contact disc 210 slidingly arranged in the mounting sleeve 120, when the mounting sleeve 120 moves downward relative to the guide column 110, the contact disc 210 contacts the top of the guide column 110 and remains stationary under the limitation of the guide column 110, while the mounting sleeve 120 continues to move downward to form relative displacement; and a connecting unit arranged between the contact disc 210 and the piston head 170, the number and position of which correspond to each group of clamping units one by one. The connecting pipe 160 and the mounting sleeve 120 are both provided with a limiting groove 221; each group of connecting units includes: a control seat 220 slidingly installed on the outside of the mounting sleeve 120 through the limiting groove 221, which is fixedly connected with the contact disc 210; a moving seat 230 slidingly installed on the outside of the connecting pipe 160 through the limiting groove 221, which is fixedly connected with the piston head 170; and a hinge rod 240 rotationally installed between the control seat 220 and the moving seat 230.

[0035] In the working process, when the workpiece is preliminarily fixed by the clamping unit and then moves downward with the mounting sleeve 120, the contact disc 210 is blocked by the guide column 110 and stops moving, and the mounting sleeve 120 continues to descend, so that the control seat 220 moves upward along the limiting groove 221; then, through the transmission of the hinged rod 240, the moving seat 230 is pushed to move along the connecting pipe 160 limiting groove 221, driving the piston head 170 to compress the gas in the piston sleeve 140, so as to drive the clamping movable end 150 to move towards the workpiece, realizing automatic locking; the above structure realizes automatic locking when the workpiece enters the polishing operation area, without the need for separate locking steps, thereby improving the automation degree and operation efficiency of the equipment. For workpieces of different sizes, the reset spring 180 can provide adaptive compensation during locking, which not only ensures the reliability of clamping and the normal operation of the control assembly, but also enhances the adaptability of the equipment to the size changes of the workpiece.

[0036] As shown in Figure 2 and Figure 8 , the device further comprises a through pipe 310 fixedly installed on the barrel cover 030, which penetrates the inside and outside of the processing barrel 020, in the embodiment, the through pipe 310 is fixedly connected with the mounting sleeve 120, in addition, in order to avoid interference between the through pipe 310 and the transmission belt of the transmission part 073, a grommet 075 is rotatably installed on the barrel cover 030, which is sleeved outside the through pipe 310 to separate the transmission belt; a suction device 320 fixedly installed on the through pipe 310 is used to generate negative pressure to remove the grinding dust generated during polishing, in the embodiment, the suction device 320 is composed of a negative pressure wheel 321 rotatably installed on the through pipe 310, a third motor 322 fixedly installed on the barrel cover 030, and a second transmission gear set 323 connecting the two, the second transmission gear set 323 includes gears and a gear ring that mesh with each other, wherein the gears are fixed on the output end of the third motor 322, and the gear ring is fixed outside the negative pressure wheel 321; a butt joint nozzle 330 fixedly installed on the top of the through pipe 310 is used to connect external chip removal pipelines to realize directional collection of grinding dust and avoid splashing pollution; and an air inlet window 340 fixedly installed on the barrel cover 030 is used to balance the air pressure inside and outside the processing barrel 020.

[0037] When polishing is performed, connect the external chip removal pipeline at the butt joint nozzle 330, start the third motor 322, drive the negative pressure wheel 321 to rotate through the second transmission gear set 323, suck external air from the air inlet window 340, and continuously exhaust the fine grinding dust generated during polishing through the through pipe 310; through the above structure, the device can simultaneously remove the grinding dust during polishing, and utilize the material stirring and dispersion effect of the polishing operation itself to make the grinding dust more easily separated from the abrasive and sucked out, effectively reducing the subsequent cleaning burden and improving the cleanliness of the working environment and the stability of continuous processing of the device.

[0038] As shown in Figure 2 and Figure 8As shown, the bottom of the inner cylinder 040 is provided with a material changing opening which penetrates to the outside of the processing cylinder 020; the material discharging assembly comprises: a mounting ring 410 fixedly installed on the outer side of the bottom of the inner cylinder 040; a plugging block 420 embedded in the material changing opening, the plug 421 of which is made of silica gel material to realize interference fit with the material changing opening by elastic deformation to form sealing; and a bolt 430 arranged between the mounting ring 410 and the plugging block 420, which is rotationally connected with the plugging block 420 and threadedly cooperates with the mounting ring 410; by rotating the bolt 430, the position of the plugging block 420 relative to the mounting ring 410 can be adjusted, so as to press or loosen the plugging block 420 to realize reliable closing or opening of the material changing opening. The above structure realizes quick discharge and replacement of the abrasive by combining the thread locking with the silica gel sealing to ensure the airtightness of the material discharging opening and facilitate efficient switching between different polishing processes of different particle sizes.

[0039] The above embodiments are provided for those skilled in the art to implement or use the present application, those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present application, therefore the protection scope of the present application is not limited by the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A multi-station automatic polishing machine, characterized in that, include: A processing frame (010); a processing cylinder (020) fixedly connected to the processing frame (010); an inner cylinder (040) rotatably connected inside the processing cylinder (020), the bottom of which is inclined to the center to form a concave structure; a first drive assembly located between the processing cylinder (020) and the inner cylinder (040) for driving the inner cylinder (040) to rotate so as to drive the abrasive to polish the workpiece; a vertical groove (050) is provided on the inner wall of the inner cylinder (040) for promoting the flow and tumbling of the abrasive; a cylinder cover (030) covering the top of the processing cylinder (020) for sealing the internal space of the processing cylinder (020); a second drive assembly located between the processing cylinder (020) and the cylinder cover (030) for driving the cylinder cover (030) to open and close the processing cylinder (020); a guide post (110) located inside the inner cylinder (040); and a mounting sleeve (120) fixedly located on the bottom surface of the cylinder cover (030), which is slidably sleeved on the outside of the guide post (110). A discharge assembly located at the center of the bottom of the inner cylinder (040) is used to quickly discharge abrasive; and at least three sets of clamping units are evenly distributed along the outer periphery of the mounting sleeve (120) for clamping workpieces; Each clamping unit includes: a clamping fixed end (130) fixed outside the mounting sleeve (120); a connecting pipe (160) fixedly connected outside the mounting sleeve (120); a piston sleeve (140) fixedly connected to the connecting pipe (160), the piston sleeve (140) communicating with the inside of the connecting pipe (160); a clamping movable end (150) that slides piston-like along the end of the piston sleeve (140); a piston head (170) that slides piston-like along the inside of the connecting pipe (160); a control component provided on the mounting sleeve (120) for driving the piston head (170) to move, so as to control the clamping movable end (150) and the clamping fixed end (130) to cooperate in clamping the workpiece; and a return spring (180) sleeved on the outside of the clamping movable end (150), the two ends of which are fixed on the clamping movable end (150) and the piston sleeve (140) respectively.

2. The multi-station automatic polishing machine as described in claim 1, characterized in that, The surfaces of the clamping fixed end (130) and the clamping movable end (150) that come into contact with the workpiece are provided with friction patterns (190) to increase friction.

3. The multi-station automatic polishing machine as described in claim 2, characterized in that, The first drive assembly includes: a transmission gear ring (061) fixedly connected to the bottom surface of the inner cylinder (040); a first motor (062) fixedly connected to the processing frame (010); and a drive gear (063) fixedly connected to the output end of the first motor (062), which meshes with the transmission gear ring (061).

4. The multi-station automatic polishing machine as described in claim 3, characterized in that, The second drive assembly includes: at least two threaded rods (071) threadedly connected to the inner wall of the processing cylinder (020), each threaded rod (071) being rotatably connected to the cylinder cover (030); a second motor (072) fixedly connected to the top of the cylinder cover (030), which is drivenly connected to one of the threaded rods (071); and a transmission member (073) disposed between any two threaded rods (071) to drive all threaded rods (071) to rotate synchronously.

5. A multi-station automatic polishing machine as described in claim 4, characterized in that, The guide post (110) is rotatably connected inside the inner cylinder (040); the control assembly includes: a contact plate (210) slidably disposed in the mounting sleeve (120), which contacts the top of the guide post (110) when the mounting sleeve (120) moves downward relative to the guide post (110); and a connecting unit disposed between the contact plate (210) and the piston head (170), the number of which and the position of which correspond one-to-one with each clamping unit; Limiting grooves (221) are provided on the outer periphery of both the connecting pipe (160) and the mounting sleeve (120); each connecting unit includes: a control seat (220) slidably connected to the outside of the mounting sleeve (120) via the limiting groove (221), which is fixedly connected to the contact plate (210); a movable seat (230) slidably connected to the outside of the connecting pipe (160) via the limiting groove (221), which is fixedly connected to the piston head (170); and a hinge rod (240) rotatably connected between the control seat (220) and the movable seat (230).

6. A multi-station automatic polishing machine as described in claim 5, characterized in that, The device further includes: a pipe (310) fixedly connected to the cylinder cover (030), which runs through the inside and outside of the processing cylinder (020); a suction device (320) fixedly connected to the pipe (310) for generating negative pressure to remove the grinding debris generated during the polishing process; a docking nozzle (330) fixedly connected to the top of the pipe (310) for connecting to an external chip removal pipe for directional collection of grinding debris; and an air inlet window (340) fixedly connected to the cylinder cover (030) for balancing the air pressure inside and outside the processing cylinder (020).

7. A multi-station automatic polishing machine as described in claim 6, characterized in that, The inner cylinder (040) has a material exchange port at the bottom, which extends to the outside of the processing cylinder (020); the material discharge assembly includes: a mounting ring (410) fixedly connected to the outside of the bottom of the inner cylinder (040); a sealing block (420) embedded in the material exchange port for closing the material exchange port; and a bolt (430) provided between the mounting ring (410) and the sealing block (420), the bolt (430) being rotatably connected to the sealing block (420) and threadedly engaged with the mounting ring (410).

8. A multi-station automatic polishing machine as described in claim 7, characterized in that, The interior of the inner cylinder (040) and the surfaces of the components connected therein are covered with a protective film to reduce abrasive wear.

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