阅读说明：本技术 一种全自动平面研磨设备 (Full-automatic plane grinding equipment ) 是由 蒋安周 钟寿堂 刘安杰 于 2021-07-23 设计创作，主要内容包括：本发明公开了一种全自动平面研磨设备,包括机架以及设置在机架上的水平驱动装置、研磨盘驱动装置、前挡圈装置、后挡圈装置,所述机架的中部设置有工作台,所述工作台的上表面设置有校准量块,所述机架的上端通过滑轨安装有移动横梁,所述机架的顶部两端设置有齿轮,所述齿轮通过齿带连接,所述移动横梁的下端设置有齿带与齿轮啮合,所述移动横梁的下端设置有安装架,所述安装架上设置有夹取装置、测量装置、修整装置、清洗装置。本发明通过设置测量装置、修整装置以及清洗装置,配合水平驱动装置、研磨盘驱动装置以及前挡圈装置、后挡圈装置的工作,能够实现对研磨盘的自动检测、清洗以及修整的工作,方便快捷。(The invention discloses full-automatic plane grinding equipment which comprises a rack, and a horizontal driving device, a grinding disc driving device, a front retainer ring device and a rear retainer ring device which are arranged on the rack, wherein a workbench is arranged in the middle of the rack, a calibration gauge block is arranged on the upper surface of the workbench, a movable cross beam is arranged at the upper end of the rack through a slide rail, gears are arranged at two ends of the top of the rack and connected through toothed belts, the lower end of the movable cross beam is provided with the toothed belts which are meshed with the gears, the lower end of the movable cross beam is provided with an installation frame, and a clamping device, a measuring device, a trimming device and a cleaning device are arranged on the installation frame. According to the invention, by arranging the measuring device, the dressing device and the cleaning device and matching with the horizontal driving device, the grinding disc driving device, the front retainer ring device and the rear retainer ring device, the automatic detection, cleaning and dressing of the grinding disc can be realized, and the automatic detection, cleaning and dressing of the grinding disc are convenient and fast.)

1. The utility model provides a full-automatic plane grinding equipment which characterized in that: including frame (10) and horizontal drive arrangement (20), abrasive disc drive arrangement (30), preceding retainer ring device (40), back retainer ring device (50) of setting in frame (10), the middle part of frame (10) is provided with workstation (101), the upper surface of workstation (101) is provided with calibration gauge block (102), movable cross beam (103) are installed through the slide rail in the upper end of frame (10), the top both ends of frame (10) are provided with the gear, the gear passes through the cingulum and connects, the lower extreme of movable cross beam (103) is provided with cingulum and gear engagement, the lower extreme of movable cross beam (103) is provided with mounting bracket (104), it gets device (60), measuring device (70), trimming device (80), belt cleaning device (90) to be provided with on mounting bracket (104), it includes fourth electric cylinder (601) to get device (60), press from both sides, Mechanical tongs (602) constitute, fourth electricity jar (601) sets up the upper surface at mounting bracket (104), mounting bracket (104) are passed to the telescopic link lower extreme of fourth electricity jar (601), mechanical tongs (602) set up the telescopic link lower extreme at fourth electricity jar (601), the output shaft end of horizontal drive device (20) goes out and gear connection, abrasive disc drive arrangement (30) set up the lower extreme at workstation (101), abrasive disc (301) are installed to the upper end of abrasive disc drive arrangement (30), the last surface mounting of abrasive disc (301) has two working ring (302).

2. The full-automatic flat grinding apparatus according to claim 1, wherein: the front retainer ring device (40) and the rear retainer ring device (50) are arranged on the upper surface of a workbench (101), the front retainer ring device (40) and the rear retainer ring device (50) comprise electric lifting cylinders (401), first mounting plates (402) and driving devices (403), the electric lifting cylinders (401) are arranged on the lower surface of the workbench (101) and connected through bolts, telescopic rods of the electric lifting cylinders (401) penetrate through the workbench (101), the first mounting plates (402) are arranged at the telescopic rod ends of the electric lifting cylinders (401), the driving devices (403) comprise driving motors (4031), transmission shafts (4032), driving wheels (4033) and guide wheels (4034), the driving motors (4031) are arranged on the upper surface of the first mounting plates (402), the transmission shafts (4032) are arranged at one corner of the first mounting plates (402) through bearings, and the upper ends of the transmission shafts (4032) are in transmission connection with the driving motors (4031), the driving wheel (4033) is arranged at the lower end of the transmission shaft (4032), and the guide wheel (4034) is arranged at the other corner of the first mounting plate (402) through a mounting shaft.

3. The full-automatic flat grinding apparatus according to claim 1, wherein: measuring device (70) includes first electric jar (701), flexible shell (702), micrometer mount pad (703), micrometer probe (704) and dowel (705), first electric jar (701) set up the upper surface in mounting bracket (104), mounting bracket (104) are passed to the telescopic link lower extreme of first electric jar (701), flexible shell (702) with the lower extreme of first electric jar (701) telescopic link is connected, micrometer mount pad (703) set up the lower extreme at flexible shell (702), the lower extreme of micrometer mount pad (703) is provided with micrometer probe (704) and three dowel (705).

4. The full-automatic flat grinding apparatus according to claim 1, wherein: trimming means (80) includes second electric jar (801), second mounting panel (802), first rotating electrical machines (803), second electric jar (801) is connected fixedly through fixed plate and mounting bracket (104), second mounting panel (802) set up the telescopic link lower extreme at second electric jar (801), first rotating electrical machines (803) set up the upper surface at second mounting panel (802), the rotation axis of first rotating electrical machines (803) passes second mounting panel (802), trimming ring (804) are installed to the rotation axis lower extreme of first rotating electrical machines (803).

5. The full-automatic flat grinding apparatus according to claim 1, wherein: cleaning device (90) include third electric jar (901), third mounting panel (902), second rotating electrical machines (903), third electric jar (901) is connected fixedly through fixed plate and mounting bracket (104), third mounting panel (902) set up the telescopic link lower extreme at third electric jar (901), second rotating electrical machines (903) set up the upper surface at third mounting panel (902), the rotation axis of second rotating electrical machines (903) passes third mounting panel (902), rotatory brush head (904) are installed to the rotation axis lower extreme of second rotating electrical machines (903).

6. The full-automatic flat grinding apparatus according to claim 2, wherein: rear retainer ring device (50) the lower surface of first mounting panel (402) is provided with dust absorption mechanism (11) of absorbing water, dust absorption mechanism (11) of absorbing water set up the one corner below that is close to leading wheel (4034) at first mounting panel (402) through the dead lever, it is blocky that dust absorption mechanism (11) are whole for the arc, the lower surface of dust absorption mechanism (11) of absorbing water has seted up the suction hole, connecting hole (1101) have been seted up to the one end upper surface of dust absorption mechanism (11) of absorbing water, the air flue has been seted up to the inside of dust absorption mechanism (11) of absorbing water, the air flue communicates with suction hole, connecting hole (1101) respectively, connecting hole (1101) of dust absorption mechanism (11) of absorbing water passes through the pipe connection with the suction hole of outside negative pressure mechanism.

7. The full-automatic flat grinding apparatus according to claim 2, wherein: the front retainer ring device (40) and the rear retainer ring device (50) are respectively arranged on the outer sides of the two working rings (32), and the driving wheel (433) and the guide wheel (434) are respectively abutted against the outer walls of the working rings (32).

8. The full-automatic flat grinding apparatus according to claim 1, wherein: still include grinding fluid trace detection mechanism, grinding fluid trace detection mechanism comprises camera (12), camera (12) set up in one side of mounting bracket (104), and set up down, the output and the outside computer connection of camera (12).

Technical Field

The invention relates to the related technical field of plane grinding equipment, in particular to full-automatic plane grinding equipment.

Background

The existing plane grinding equipment utilizes a grinding disc to grind a workpiece, the plane grinding equipment does not have the function of providing automatic measurement, the grinding precision is difficult to control, and the accurate size control cannot be achieved, so the high-precision grinding size cannot be achieved.

Disclosure of Invention

The present invention is directed to a full-automatic flat grinding apparatus to solve the above-mentioned problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: a full-automatic plane grinding device comprises a rack, a horizontal driving device, a grinding disc driving device, a front retainer ring device and a rear retainer ring device, wherein the horizontal driving device, the grinding disc driving device, the front retainer ring device and the rear retainer ring device are arranged on the rack, a workbench is arranged in the middle of the rack, a calibration gauge block is arranged on the upper surface of the workbench, a movable cross beam is mounted at the upper end of the rack through a slide rail, gears are arranged at two ends of the top of the rack and connected through toothed belts, the lower end of the movable cross beam is provided with a toothed belt meshed with the gears, a mounting frame is arranged at the lower end of the movable cross beam, a clamping device, a measuring device, a trimming device and a cleaning device are arranged on the mounting frame, the clamping device comprises a fourth electric cylinder and a mechanical gripper, the fourth electric cylinder is arranged on the upper surface of the mounting frame, the lower end of a telescopic rod of the fourth electric cylinder penetrates through the mounting frame, and the mechanical gripper is arranged at the lower end of the telescopic rod of the fourth electric cylinder, the output shaft end of the horizontal driving device is connected with a gear, the grinding disc driving device is arranged at the lower end of the workbench, a grinding disc is installed at the upper end of the grinding disc driving device, and two working rings are installed on the upper surface of the grinding disc.

Preferably, preceding retaining ring device, back retaining ring device all set up at the workstation upper surface, preceding retaining ring device, back retaining ring device all include promotion electric cylinder, first mounting panel and drive arrangement, it just passes through bolted connection to promote the electric cylinder setting at the lower surface of workstation, the telescopic link that promotes the electric cylinder passes the workstation, first mounting panel sets up the telescopic link end department at promotion electric cylinder, drive arrangement includes driving motor, transmission shaft and action wheel, leading wheel, driving motor sets up the upper surface at first mounting panel, the transmission shaft passes through the one corner of bearing setting at first mounting panel, the upper end of transmission shaft with the driving motor transmission is connected, the lower extreme at the transmission shaft is installed to the action wheel, the leading wheel sets up another angle at first mounting panel through the installation axle.

Preferably, measuring device includes first electric jar, flexible shell, micrometer mount pad, micrometer probe and shop bolt, first electric jar sets up the upper surface at the mounting bracket, the mounting bracket is passed to the telescopic link lower extreme of first electric jar, flexible shell with the lower extreme of first electric jar telescopic link is connected, the micrometer mount pad sets up the lower extreme at flexible shell, the lower extreme of micrometer mount pad is provided with micrometer probe and three shop bolt.

Preferably, trimming means includes second electricity jar, second mounting panel, first rotating electrical machines, the second electricity jar passes through the fixed plate and is connected fixedly with the mounting bracket, the second mounting panel sets up the telescopic link lower extreme at the second electricity jar, first rotating electrical machines sets up the upper surface at the second mounting panel, the rotating shaft of first rotating electrical machines passes the second mounting panel, the trimming ring is installed to the rotating shaft lower extreme of first rotating electrical machines.

Preferably, belt cleaning device includes third electric jar, third mounting panel, second rotating electrical machines, the third electric jar passes through the fixed plate and is connected fixedly with the mounting bracket, the third mounting panel sets up the telescopic link lower extreme at the third electric jar, the second rotating electrical machines sets up the upper surface at the third mounting panel, the rotation axis of second rotating electrical machines passes the third mounting panel, rotatory brush head is installed to the rotation axis lower extreme of second rotating electrical machines.

Preferably, the lower surface of first mounting panel is provided with the dust absorption mechanism that absorbs water, the dust absorption mechanism that absorbs water passes through the dead lever setting and is close to the one corner below of leading wheel at first mounting panel, the dust absorption mechanism that absorbs water is whole for the arc cubic, a plurality of holes of inhaling have been seted up to the lower surface of the dust absorption mechanism that absorbs water, the connecting hole has been seted up to the one end upper surface of the dust absorption mechanism that absorbs water, the air flue has been seted up to the inside of the dust absorption mechanism that absorbs water, the air flue respectively with inhale hole, connecting hole intercommunication, the connecting hole of the dust absorption mechanism that absorbs water passes through the pipe connection with the hole of inhaling of outside negative pressure mechanism.

Preferably, the front retainer ring device and the rear retainer ring device are respectively arranged at the outer sides of the two working rings, and the driving wheel and the guide wheel are respectively abutted against the outer walls of the working rings.

Preferably, still include grinding fluid trace detection mechanism, grinding fluid trace detection mechanism comprises the camera, the camera sets up in one side of mounting bracket, and sets up down, the output and the outside computer connection of camera.

The invention provides full-automatic plane grinding equipment, which has the following beneficial effects:

(1) the invention is characterized in that a measuring device, a dressing device and a cleaning device are arranged to cooperate with a horizontal driving device, a grinding disc driving device, a front retainer ring device and a rear retainer ring device to work, the measuring device is used for detecting the flatness of the disc surface of a grinding disc, the front retainer ring device and the rear retainer ring device are used for clamping a working ring and separating the working ring from the grinding disc in cooperation with a clamping device, the horizontal driving device is used for transversely adjusting the horizontal positions of the dressing device and the cleaning device, and the dressing device or the cleaning device is adjusted to be above the grinding disc for dressing or cleaning work.

(2) According to the invention, the water and dust absorption mechanism is arranged, the connecting hole of the water and dust absorption mechanism is connected with the air inlet of the external negative pressure device through the connecting pipeline, so that when the grinding disc is cleaned, sewage and dust can enter the air passage through the suction hole of the water and dust absorption mechanism and enter the connecting pipeline through the connecting hole, and the surface of the grinding disc is ensured to be clean.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the configuration of the dressing apparatus of the present invention;

FIG. 3 is a schematic view of the cleaning apparatus of the present invention;

FIG. 4 is a schematic structural view of a rear retainer device of the present invention;

FIG. 5 is a schematic view of the structure of the measuring device of the present invention;

fig. 6 is a schematic structural view of the water absorption and dust collection structure of the invention.

In the figure:

10. a frame; 101. a work table; 102. a marble block; 103. moving the beam; 104. a mounting frame;

20. a horizontal driving device;

30. a grinding disk drive device; 301. a grinding disk; 302. a working ring;

40. a front retainer device; 401. lifting the electric cylinder; 402. a first mounting plate; 403. a drive device; 4031. a drive motor; 4032. a drive shaft; 4033. a driving wheel; 4034. a guide wheel;

50. a rear retainer ring device;

60. a gripping device; 601. a fourth electric cylinder; 602. a mechanical gripper;

70. a measuring device; 701. a first electric cylinder; 702. a telescoping shell; 703. a micrometer mounting base; 704. a micrometer probe; 705. positioning a pin;

80. a dressing device; 801. a second electric cylinder; 802. a second mounting plate; 803. a first rotating electrical machine; 804. trimming the ring;

90. a cleaning device; 901. a third electric cylinder; 902. a third mounting plate; 903. a second rotating electrical machine; 904. rotating the brush head;

11. a water and dust absorption mechanism; 1101. connecting hole

12. A camera is provided.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1 to 6, the present invention provides the technical solutions: a full-automatic plane grinding device comprises a rack 10, a horizontal driving device 20, a grinding disc driving device 30, a front retainer ring device 40 and a rear retainer ring device 50, wherein the horizontal driving device 20, the grinding disc driving device 30, the front retainer ring device 40 and the rear retainer ring device 50 are arranged on the rack 10, a workbench 101 is arranged in the middle of the rack 10, marble blocks 102 are arranged on the upper surface of the workbench 101, a movable cross beam 103 is mounted at the upper end of the rack 10 through a sliding rail, gears are arranged at two ends of the top of the rack 10 and connected through toothed belts, the lower end of the movable cross beam 103 is provided with toothed belts meshed with the gears, a mounting frame 104 is arranged at the lower end of the movable cross beam 103, a clamping device 60, a measuring device 70, a trimming device 80 and a cleaning device 90 are arranged on the mounting frame 104, the clamping device 60 comprises a fourth electric cylinder 601 and a mechanical hand grip 602, the fourth electric cylinder 601 is arranged on the upper surface of the mounting frame 104, and the lower end of the fourth electric cylinder 601 passes through the mounting frame 104, the mechanical gripper 602 is arranged at the lower end of an expansion rod of the fourth electric cylinder 601, an output shaft end of the horizontal driving device 20 is connected with a gear, the grinding disc driving device 30 is arranged at the lower end of the workbench 101, the grinding disc 301 is arranged at the upper end of the grinding disc driving device 30, and two working rings 302 are arranged on the upper surface of the grinding disc 301.

The front retainer ring device 40 and the rear retainer ring device 50 are both arranged on the upper surface of the workbench 101, the front retainer ring device 40 and the rear retainer ring device 50 each comprise a lifting electric cylinder 401, a first mounting plate 402 and a driving device 403, the lifting electric cylinder 401 is arranged on the lower surface of the workbench 101 and connected through a bolt, the telescopic rod of the lifting electric cylinder 401 penetrates through the workbench 101, the first mounting plate 402 is arranged at the telescopic rod end of the lifting electric cylinder 401, the driving device 403 comprises a driving motor 4031, a transmission shaft 4032, a driving wheel 4033 and a guide wheel 4034, the driving motor 4031 is disposed on the upper surface of the first mounting plate 402, the driving shaft 4032 is disposed on a corner of the first mounting plate 402 via a bearing, the upper end of the transmission shaft 4032 is in transmission connection with the driving motor 4031, the driving wheel 4033 is arranged at the lower end of the transmission shaft 4032, the guide wheel 4034 is arranged at the other corner of the first mounting plate 402 through a mounting shaft.

Measuring device 70 includes first electric jar 701, flexible shell 702, micrometer mount pad 703, micrometer probe 704 and dowel 705, first electric jar 701 sets up the upper surface at mounting bracket 104, mounting bracket 104 is passed to first electric jar 701's telescopic link lower extreme, flexible shell 702 with the lower extreme of first electric jar 701 telescopic link is connected, micrometer mount pad 703 sets up the lower extreme at flexible shell 702, the lower extreme of micrometer mount pad 703 is provided with micrometer probe 704 and three dowel 705.

The trimming device 80 comprises a second electric cylinder 801, a second mounting plate 802 and a first rotating motor 803, wherein the second electric cylinder 801 is fixedly connected with the mounting frame 104 through a fixing plate, the second mounting plate 802 is arranged at the lower end of an expansion rod of the second electric cylinder 801, the first rotating motor 803 is arranged on the upper surface of the second mounting plate 802, a rotating shaft of the first rotating motor 803 penetrates through the second mounting plate 802, and a trimming ring 804 is arranged at the lower end of the rotating shaft of the first rotating motor 803.

The cleaning device 90 comprises a third electric cylinder 901, a third mounting plate 902 and a second rotating motor 903, wherein the third electric cylinder 901 is fixedly connected with the mounting frame 104 through a fixing plate, the third mounting plate 902 is arranged at the lower end of an expansion link of the third electric cylinder 901, the second rotating motor 903 is arranged on the upper surface of the third mounting plate 902, a rotating shaft of the second rotating motor 903 penetrates through the third mounting plate 902, and a rotating brush head 904 is arranged at the lower end of the rotating shaft of the second rotating motor 903.

The lower surface of first mounting panel 402 is provided with the dust absorption mechanism 11 that absorbs water, the dust absorption mechanism 11 that absorbs water sets up the one corner below that is close to leading wheel 4034 at first mounting panel 402 through the dead lever, the whole arc block that is of dust absorption mechanism 11 that absorbs water, a plurality of suction holes have been seted up to the lower surface of dust absorption mechanism 11 that absorbs water, connecting hole 1101 has been seted up to the one end upper surface of dust absorption mechanism 11 that absorbs water, the air flue has been seted up to the inside of dust absorption mechanism 11 that absorbs water, the air flue communicates with suction hole, connecting hole 1101 respectively, the connecting hole 1101 of dust absorption mechanism 11 that absorbs water passes through the pipe connection with the suction hole of outside negative pressure mechanism.

The front retainer ring device 40 and the rear retainer ring device 50 are respectively arranged at the outer sides of the two working rings 32, and the driving wheel 433 and the guide wheel 434 are respectively abutted against the outer walls of the working rings 32.

Still include grinding fluid trace detection mechanism, grinding fluid trace detection mechanism comprises camera 12, camera 12 sets up in one side of mounting bracket 104, and sets up down, the output and the outside computer of camera 12 are connected, when grinding the part, take a picture to the grinding dish through camera 12, and the computer that connects is sent to the photo of will taking simultaneously, judges the grinding fluid consistency this moment by the computer according to the water wave size of photo to the supply volume of control grinding fluid.

The working principle is that after a long time of grinding parts, the flatness of the grinding disc 301 needs to be detected, the horizontal driving device 20 moves the measuring device 70 to be right above the marble block, the first electric cylinder 701 on the upper part of the measuring device 70 drives the micrometer probe 704 and the positioning pin 705 to fall on the marble block 102, the micrometer probe 704 contacts the marble block 102 first, then the positioning pin 705 contacts the marble block 102, then the first electric cylinder 701 drives downwards for a certain distance, the measuring device 70 is freely placed on the marble block 102, micrometer data is recorded by taking the micrometer probe 704 as a reference value, then the first electric cylinder 701 is lifted to a position before descending, the horizontal driving device 20 drives the measuring device 70 to move to be right above the measuring position of the grinding disc 301, the first electric cylinder 701 drives the micrometer probe 704 and the positioning pin 705 to fall on the grinding disc 301, the micrometer probe 704 contacts the grinding disc 301 first, then the positioning pin 705 contacts the grinding disc 301 again, and the first electric cylinder 701 is driven downwards for a certain distance to allow the measuring device 70 to be freely placed on the grinding disc 301 again, and the micrometer data is recorded, and the previous marble data is compared to judge the flatness of the area of the grinding disc. Then the first electric cylinder 701 drives the micrometer probe 704 to lift to the original height again, and one measurement is completed. Then the grinding disc rotates 30 degrees, the measurement is repeated, the grinding disc rotates 30 degrees again, the measurement is repeated … … until the measurement of the whole disc surface is completed, finally, the measurement data of each time are counted to obtain the final planeness of the grinding disc, and meanwhile, whether the grinding disc 301 at the moment is a concave disc or a convex disc is determined according to the size of the measurement data of the measurement area;

when dressing the grinding disc 301, the rear retainer ring device 50 is lifted by the bottom lift cylinder 401, and the position of the working ring 302 is released. Rotating the grinding disc 301 to a designated angle, moving the fourth electric cylinder 601 to a position right above the working ring through the horizontal driving device 20, then moving the mechanical gripper 602 downwards to a designated height through the upper fourth electric cylinder 601, opening the air cylinder gripper to grip the working ring 302, then lifting the working ring 302 to the designated height through the upper fourth electric cylinder 601, moving the working ring to a designated position through the horizontal driving device 20, then placing the gripped working ring 302 to the designated position through the upper fourth electric cylinder 601, repeating the above operations, and placing the second working ring 302 to the designated position to empty the grinding disc 301. Then the horizontal driving device 20 drives the dressing device 80 to move to a designated position (judging whether the grinding disc is a concave disc or a convex disc according to the measured flatness) right above the grinding disc 301, the second electric cylinder 801 of the dressing device 80 drives the dressing ring 804 to descend onto the grinding disc 301, then the second electric cylinder 802 descends for a certain distance again, the dressing ring 804 is freely placed on the grinding disc 301 again, then the first rotating motor 803 of the dressing device 80 drives the dressing ring 804 to rotate, the grinding disc 301 also rotates, and after a period of time, the grinding disc 301 can be dressed;

when the grinding disc 301 is cleaned, the water and dust absorption mechanism 11 on the rear check ring device is connected with an external negative pressure device through a connecting pipe, the rear check ring device works through a lifting electric cylinder at the bottom to vacate the position of a working ring, the grinding disc driving device rotates the grinding disc to a specified angle, the clamping device moves to the position right above the working ring through the horizontal driving device, then the mechanical gripper moves downwards to a specified height through a fourth electric cylinder above the mechanical gripper, opens the mechanical gripper to clamp the working ring, then the working ring is lifted to the specified height through the fourth electric cylinder above the mechanical gripper, and then the clamping device moves to the specified position through the horizontal driving device, then the fourth electric cylinder above the mechanical gripper puts the grabbed working ring to the specified position, the above operations are repeated, and the second working ring is also put to the specified position to vacate the grinding disc. Then the rotatory brush head of washing dish passes through horizontal drive device and moves to the assigned position, and the third electric jar on rethread falls the brush head to the assigned height, then the second rotating electrical machines and the abrasive disc of brush head rotate simultaneously, and back retaining ring device falls the assigned height through the promotion electric jar of below, and the dust absorption mechanism that is located on back retaining ring device works simultaneously, and after a period of time, the grinding dish face will be washed very cleanly.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.