CN115091297A

CN115091297A - Automatic grinding machine

Info

Publication number: CN115091297A
Application number: CN202210917547.2A
Authority: CN
Inventors: 李彦青; 傅长娟; 王园园; 赵向纯; 陈建文; 吴瑞敏
Original assignee: Yonghong Baoding Foundry Machinery Co ltd
Current assignee: Yonghong Baoding Foundry Machinery Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-09-23

Abstract

The invention discloses an automatic grinding machine which comprises an equipment base, a grinding wheel mechanism, a to-be-ground part positioning device and a whole machine shell for protection, wherein the grinding wheel mechanism is arranged on the left side of the equipment base; the workpiece to be ground is arranged on the rotating mechanism, and automatic grinding operation is realized through the linkage of three axes of translation, lifting and rotation. The automatic grinding machine is reasonable in layout, automatic in operation, convenient and fast to use, free of manual continuous operation intervention, safe and reliable, stable in grinding operation and good in grinding quality consistency, and the operating environment and the operating personnel are well separated due to the design of the whole machine shell, so that direct contact between the operating personnel and the operating environment is reduced to the maximum extent.

Description

Automatic grinding machine

Technical Field

The invention relates to the field of die-casting blank processing equipment, in particular to an automatic grinding machine.

Background

The smelted liquid metal (molten iron) is poured, injected, sucked or injected into a die by other methods, and a casting blank is obtained after cooling, or a blank piece is obtained by solid metal (aluminum) through technological methods such as die casting and the like. At this time, because of the forming process, the blank has casting head, parting line or irregular surface caused by defects of mould or molding sand on the surface. At the moment, the irregular surface needs to be treated before the blank enters the machining process, and the treatment means comprises: knocking, shearing, polishing and cutting. The grinding is a process of processing and forming a blank by using a certain tool through a certain method, specifically, a grinding tool with certain hardness and roughness is circularly or reciprocally moved through a certain mechanical structure and is applied to the surface of the processed blank, so that the grinding tool and the surface of the blank are relatively moved, and a finished product with a required surface is obtained.

Currently, the operation methods are divided into two types: one is that a workpiece is manually held, and the position of the workpiece to be polished is close to a grinder for polishing; the other type is that a small-sized hand-held grinder is manually held to be close to the workpiece for grinding. Either way, the following problems are faced: 1) noise generated by polishing is harmful to the environment and human bodies; 2) dust generated by polishing is harmful to the environment and human bodies; 3) the labor intensity of the operation content is high, and the operation content is harmful to human bodies;

4) the polishing effect is unstable due to manual difference, and phenomena of excessive polishing, insufficient polishing, mistaken polishing and the like occur; finally, the treatment process has few operators and difficult recruitment, further influences the production efficiency of parts and is difficult to meet market supply.

Disclosure of Invention

The invention aims to provide an automatic grinding machine, which solves the problems that in the prior art, manual grinding is adopted, the efficiency is low, the grinding effect is unstable due to manual difference, excessive grinding, insufficient grinding, mistaken grinding and the like occur, the grinding quality is unstable, the labor cost of manual grinding is high, and the danger coefficient is high.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention discloses an automatic grinding machine which comprises an equipment base, a grinding wheel mechanism and a to-be-ground part positioning device, wherein the grinding wheel mechanism is installed on the left side of the equipment base, the to-be-ground part positioning device is installed on the right side of the equipment base, a to-be-ground part is installed at the top of the to-be-ground part positioning device and is adjusted to be flush with the working end of the grinding wheel mechanism through translation and lifting, the periphery of the equipment base is connected with a whole machine shell for protection, a whole machine electric control cabinet is arranged on one side of the whole machine shell, a liquid crystal operation display screen is arranged at the top of the whole machine electric control cabinet, and all driving parts on the to-be-ground part positioning device are electrically connected with the whole machine electric control cabinet.

Further, wait to grind a positioner and include translation mechanism, elevating system and rotary mechanism, translation mechanism installs on the top surface of equipment base, elevating system installs translation mechanism is last, rotary mechanism installs elevating system's top, wait to grind the piece and install rotary mechanism is last to through translation, lift adjustment to with grinding wheel mechanism's work end parallel and level.

Furthermore, the grinding wheel mechanism comprises a grinding wheel driving motor, a grinding wheel and a grinding wheel support, the grinding wheel is rotatably installed at the top of the grinding wheel support, one end of a grinding wheel shaft of the grinding wheel is in transmission connection with the grinding wheel driving motor, and the bottom of the grinding wheel support is installed on the equipment base 1 through an installation base.

Furthermore, the periphery of the grinding wheel is provided with a grinding wheel protective cover for protection, a dust collecting pipe is connected to the lateral lower part of the grinding wheel protective cover, and the tail end of the dust collecting pipe is provided with a dust remover.

Further, the translation mechanism comprises a translation driving motor, a moving seat and a ball screw, the translation driving motor is mounted on the equipment base, an output shaft of the translation driving motor is in transmission connection with the ball screw, a driving block is arranged at the bottom of the moving seat, and the ball screw is connected with the driving block through threads; the two ends of the ball screw are supported and positioned through the front support and the rear support, and a guide mechanism is arranged at the bottom of the moving seat.

Further, guiding mechanism includes translation guide rail and guide block, translation guide rail be provided with two and with ball parallel arrangement, translation guide rail passes through bolted connection on the equipment base, the guide block is connected on the basal plane of removal seat, the guide block with translation guide rail phase-match.

Furthermore, the lifting mechanism comprises a lifting driving motor, a lifting fixing frame and a lifting frame, the bottom of the lifting fixing frame is connected to the movable base, the lifting frame is slidably connected into the lifting fixing frame, a lifting ball screw is arranged on one side, close to the lifting driving motor, of the lifting frame, a driven synchronizing wheel is mounted on the lifting ball screw, a driving synchronizing wheel is connected to a rotating shaft of the lifting driving motor, the driving synchronizing wheel and the driven synchronizing wheel are connected through a synchronous belt in a transmission manner, a screw nut is connected to the bottom of the lifting frame, and the screw nut is in threaded connection with the lifting ball screw; and a lifting guide mechanism is arranged between the lifting frame and the front and rear matching surfaces of the lifting fixing frame.

Further lift guiding mechanism is including the lift slide rail and the slider that match each other, the lift slide rail passes through bolted connection and is in on the front and back side of crane, the slider passes through the screw connection and is in on the fixed frame medial surface of lift, be provided with the lift slide rail and the slider of two sets of parallels on each side.

Further, the rotating mechanism comprises a rotating driving motor, a three-jaw chuck and a high-precision rotary table, the rotating driving motor is installed on the high-precision rotary table and is in transmission connection with the input end of the high-precision rotary table, the three-jaw chuck is installed on the output end of the high-precision rotary table, and the driving motor is started to drive the three-jaw chuck and the workpiece to be ground to rotate synchronously through the rotating operation of the high-precision rotary table; the high accuracy revolving stage is installed on the crane, just the high accuracy revolving stage sets up to hollow structure, install the chuck connecting seat on the high accuracy revolving stage, just the chuck connecting seat through connection be in the cavity of high accuracy revolving stage, three-jaw chuck is installed chuck connecting seat top, the top of chuck connecting seat is connected with the gyration hydro-cylinder through the chuck connecting piece, the work end of gyration hydro-cylinder links together through the chuck connecting rod with the three-jaw chuck at top, the chuck connecting rod is followed the center of chuck connecting seat is run through and is crossed, the gyration hydro-cylinder is located the inside of crane, the gyration hydro-cylinder passes through oil pipe and hydraulic pressure station intercommunication, the hydraulic pressure station install on the equipment base and with emery wheel mechanism places side by side.

Furthermore, the rotary oil cylinder drives through a chuck connecting rod the three-jaw chuck finishes the positioning operation, the three-jaw chuck comprises a chuck body and three clamping jaws, the clamping jaws are connected with each other in a circumferential uniform distribution mode on the chuck body, and the clamping jaws slide along respective slide lines.

Compared with the prior art, the invention has the following beneficial technical effects:

the invention relates to an automatic grinding machine which comprises an equipment base, a grinding wheel mechanism and a positioning device for a piece to be ground, wherein an electric control cabinet is arranged behind the grinding wheel mechanism, the periphery of the equipment base is connected with a whole machine shell for protection, and one side of the whole machine shell extends out of a liquid crystal operation display screen; specifically, the positioning device for the workpiece to be ground comprises a translation mechanism, a lifting mechanism and a rotating mechanism, wherein the translation mechanism is arranged on the top surface of the equipment base, the lifting mechanism is arranged on the translation mechanism, and the rotating mechanism is arranged on the top of the lifting mechanism; when the grinding machine works, a to-be-ground part is arranged on the rotating mechanism and is adjusted to be flush with the working end of the grinding wheel mechanism through translation and lifting, and the grinding wheel on the grinding wheel mechanism rotates at a high speed to grind the edge or other processing parts of the to-be-ground part. In addition, the grinding wheel mechanism further comprises a control system, and driving pieces of the grinding wheel mechanism, the translation mechanism, the lifting mechanism and the rotating mechanism are all electrically connected with the control system to realize automatic control.

The three-jaw chuck on the rotating mechanism is automatically driven by the rotary oil cylinder, so that the workpiece to be ground is automatically clamped, oil supply and cut-off operations of the oil cylinder are controlled by the control system, the chuck is clamped and loosened, the operation is convenient and quick, and the three-jaw chuck is suitable for positioning annular workpieces to be ground of various specifications.

The automatic grinding machine is reasonable in layout, automatic in operation, convenient and fast to use, free of manual continuous operation intervention, safe and reliable, stable in grinding operation and good in grinding quality consistency, and the operating environment and the operating personnel are well separated due to the design of the whole machine shell, so that direct contact between the operating personnel and the operating environment is reduced to the maximum extent.

Drawings

The invention is further illustrated in the following description with reference to the drawings.

FIG. 1 is a schematic view of an automatic grinding machine according to the present invention;

FIG. 2 is a front view of the automatic grinding machine of the present invention;

FIG. 3 is a top view of the automatic grinder of the present invention;

FIG. 4 is a side view of the automatic grinding machine of the present invention;

FIG. 5 is a schematic view of another perspective of the automatic grinder of the present invention;

FIG. 6 is a schematic view of a rotating mechanism according to the present invention;

FIG. 7 is a cross-sectional view of a rotating mechanism and a lifting mechanism of the present invention;

description of reference numerals: 1. an equipment base; 2. a grinding wheel mechanism; 3. a translation mechanism; 4. a lifting mechanism; 5. a rotation mechanism; 6. a whole machine shell; 7. a hydraulic station; 8. a member to be ground;

201. a grinding wheel driving motor; 202. a grinding wheel; 203. a grinding wheel shield; 204. a grinding wheel bracket; 205. a dust collecting pipe; 206. installing a base;

401. a translation drive motor; 302. a movable seat; 303. a front support; 304. a ball screw; 305. a rear support; 306. a translation guide rail; 307. a guide block; 308. a drive block;

402. a lifting drive motor; 402. a lifting fixed frame; 403. a lifting frame; 404. lifting the slide rail; 405. a synchronous belt; 406. a lifting ball screw; 407. a lead screw nut;

501. a rotary drive motor; 502. a three-jaw chuck; 503. a claw; 504. a high-precision turntable; 505. a chuck connecting seat; 506. a chuck connecting rod; 507. a chuck connector; 508. a rotary oil cylinder.

Detailed Description

As shown in fig. 1-7, an automatic grinding machine comprises an equipment base 1, a grinding wheel mechanism 2 and a to-be-ground part positioning device, wherein the grinding wheel mechanism 2 is installed on the left side of the equipment base 1, the to-be-ground part positioning device is installed on the right side of the equipment base 1, a to-be-ground part 8 is installed on the top of the to-be-ground part positioning device and is aligned with the working end of the grinding wheel mechanism 2 through translation and lifting adjustment, a whole machine shell 6 for protection is connected to the periphery of the equipment base 1, a whole machine electric control cabinet is arranged on one side of the whole machine shell 6, a liquid crystal operation display screen is arranged on the top of the whole machine electric control cabinet, and all driving components on the to-be-ground part positioning device are electrically connected with the whole machine electric control cabinet. The design of the whole machine shell 6 realizes the closed grinding operation environment, is convenient for noise reduction, isolates dust, forms protection, avoids the workpiece and the grinding wheel from hurting people due to faults, and improves the operation safety.

Specifically, wait to grind a positioner and include translation mechanism 3, elevating system 4 and rotary mechanism 5, translation mechanism 3 is installed on the top surface of equipment base 1, elevating system 4 is installed translation mechanism 3 is last, rotary mechanism 5 is installed elevating system 4's top, wait to grind 8 and install on the rotary mechanism 5 to through translation, lift adjustment extremely with grinding wheel mechanism 2's work end parallel and level. In addition, the grinding wheel mechanism comprises a control system, and driving pieces of the grinding wheel mechanism 2, the translation mechanism 3, the lifting mechanism 4 and the rotating mechanism 5 are all electrically connected with the control system so as to realize automatic control.

Specifically, the grinding wheel mechanism 2 comprises a grinding wheel driving motor 201, a grinding wheel 202 and a grinding wheel support 204, wherein the grinding wheel 202 is rotatably installed at the top of the grinding wheel support 204, one end of a grinding wheel shaft of the grinding wheel 202 is in transmission connection with the grinding wheel driving motor 201, a bearing is arranged between the grinding wheel shaft and the grinding wheel support 204, and the bottom of the grinding wheel support 204 is installed on the equipment base 1 through an installation base 206. A grinding wheel shield 203 for protection is arranged on the periphery of the grinding wheel 202, a dust collecting pipe 205 is connected to the lower side of the grinding wheel shield 203, and a dust remover is installed at the tail end of the dust collecting pipe 205. Specifically, a fan-shaped opening is formed in the working side of the grinding wheel shield 203, and the grinding wheel 202 protrudes out of the fan-shaped opening and is used for being in contact with the to-be-ground part 8 for grinding; when the grinding wheel grinding machine works, the grinding wheel driving motor 201 drives the grinding wheel 202 to rotate at a high speed through the grinding wheel shaft, and grinding operation is completed. The specific grinding wheel 202 comprises a grinding wheel seat, a grinding wheel and fastening bolt assemblies, the grinding wheel seat is fixed on a grinding wheel shaft through a positioning key, the grinding wheel is connected to the grinding wheel seat through a plurality of fastening bolt assemblies, the detachable structure facilitates quick replacement of the grinding wheel, and the grinding wheel can be replaced quickly in time according to different grinding requirements.

Specifically, as shown in fig. 3, the translation mechanism 3 includes a translation driving motor 301, a moving base 302 and a ball screw 304, the translation driving motor 301 is mounted on the device base 1, an output shaft of the translation driving motor 301 is in transmission connection with the ball screw 304, a driving block 308 is arranged at the bottom of the moving base 302, and the ball screw 304 is connected with the driving block 308 through a thread; the two ends of the ball screw 304 are supported and positioned by a front support 303 and a rear support 305, and the bottom of the movable base 302 is provided with a guide mechanism. The guide mechanism comprises a translation guide rail 306 and a guide block 307, wherein the translation guide rail 306 is provided with two guide rails and arranged in parallel with the ball screw 304, the translation guide rail 306 is connected to the equipment base 1 through a bolt, the guide block 307 is connected to the bottom plane of the moving seat 302, and the guide block 307 is matched with the translation guide rail 306.

During operation, translation driving motor 301 starts, drives ball 304 rotation operation, because ball 304 with drive block 308 passes through threaded connection, converts rotation operation into rectilinear translation operation, and then drives and move seat 302 and remove, and removes in-process guide block 307 and slide along translation guide rail 306, and translation operation's stability has been guaranteed to this guiding mechanism's design. The adjustment of the distance between the member to be ground 8 and the grinding wheel 202 is realized by the design of the translation mechanism 3.

As shown in fig. 2, 6, and 7, the lifting mechanism 4 includes a lifting driving motor 401, a lifting fixed frame 402, and a lifting frame 403, the bottom of the lifting fixed frame 402 is connected to the moving base 302, the lifting frame 403 is slidably connected to the inside of the lifting fixed frame 402, a lifting ball screw 406 is provided on one side of the lifting frame 403 close to the lifting driving motor 401, a driven synchronizing wheel is installed on the lifting ball screw 406, a driving synchronizing wheel is connected to a rotating shaft of the lifting driving motor 401, the driving synchronizing wheel and the driven synchronizing wheel are connected through a synchronous belt 405, a screw nut 407 is connected to the bottom of the lifting frame 403, and the screw nut 407 is in threaded connection with the lifting ball screw 406; a lifting guide mechanism is arranged between the front and back matching surfaces of the lifting frame 403 and the lifting fixing frame 402. Specifically, the upper end and the lower end of the inner side of the lifting fixing frame 402 are respectively connected with a screw fixing seat, the lifting ball screw 406 penetrates through the screw fixing seats, and the screw fixing seats mainly play a role in positioning and supporting, so that the rotating stability of the lifting ball screw is ensured.

The lifting guide mechanism comprises a lifting slide rail 404 and a slide block which are matched with each other, the lifting slide rail 404 is connected to the front side surface and the rear side surface of the lifting frame 403 through bolts, the slide block is connected to the inner side surface of the lifting fixed frame 402 through screws, and two groups of parallel lifting slide rails 404 and slide blocks are arranged on each side surface; the lifting slide rail 404 and the slide block can be manufactured according to actual specifications, or can be directly installed after purchasing standard components.

During operation, lift driving motor 401 starts, connects through initiative synchronizing wheel, driven synchronizing wheel and synchronous belt drive, and the operating characteristic through lift ball converts rotatory operation into straight line lift operation, and lift ball links together with crane 403 location to drive crane 403 and reciprocate, remove the in-process and lead through lift slider 404 and the inseparable cooperation of slide rail, guarantee the stability of lift operation.

As shown in fig. 6, the rotating mechanism 5 includes a rotating driving motor 501, a three-jaw chuck 502 and a high-precision turntable 504, the rotating driving motor 501 is mounted on the high-precision turntable 504 and is in transmission connection with an input end of the high-precision turntable 504 through a meshing gear, the meshing gear adopts a bevel gear set, and the rotating operation of the horizontally placed rotating driving motor 501 is directly transmitted to the vertically placed high-precision turntable 504; the three-jaw chuck 502 is mounted at the output end of the high-precision rotary table 504, and the driving motor 501 is started to drive the three-jaw chuck 502 and the piece to be ground to synchronously rotate through the rotation operation of the high-precision rotary table 504; the high-precision rotary table 504 is mounted on the lifting frame 403, the high-precision rotary table 504 is set to be a hollow structure, a chuck connecting seat 505 is mounted on the high-precision rotary table 504, and the chuck connecting seat 505 is penetratingly connected in the cavity of the high-precision turntable 504, the three-jaw chuck 502 is installed on the top of the chuck connecting seat 505, the top of the chuck connecting seat 505 is connected with a swivel cylinder 508 through a chuck connecting member 507, the working end of the swivel cylinder 508 is connected with the top three-jaw chuck 502 through a chuck connecting rod 506, the chuck connecting rod 506 passes through the center of the chuck connecting seat 505, the swivel cylinder 508 is positioned inside the lifting frame 403, the rotary oil cylinder 508 is communicated with the hydraulic station 7 through an oil pipe, and the hydraulic station 7 is installed on the equipment base 1 and is arranged side by side with the grinding wheel mechanism 2.

Specifically, the rotary cylinder 508 passes through chuck connecting rod 506 drive the location operation is accomplished to three-jaw chuck 502, three-jaw chuck 502 includes a chuck body and three jack catch 503, jack catch 503 is the circumference equipartition and connects on the chuck body, just jack catch 503 slides along respective slide straight line. Specifically, the chuck body is provided with a driving block, the driving block is connected with a rotary oil cylinder 508 through a chuck connecting rod 506, and during operation, the rotary oil cylinder 508 is started to drive the driving block to move through the chuck connecting rod 506, so that the clamping jaws are driven to be close to or far away from the axis synchronously towards the axis. The clamping jaw can adapt to the fastening and positioning operation of more parts by changing the specification of the clamping jaw. The three-jaw chuck 502 can be assembled after purchasing standard parts according to actual needs, and can also be assembled after necessary modification according to the specificity of an actual workpiece.

The working process of the invention is as follows:

firstly, installing a to-be-ground part 8, namely installing the to-be-ground part 8 on the rotating mechanism 5, wherein the outer diameter of a clamping jaw 503 on the three-jaw chuck 502 is smaller than the inner diameter of the to-be-ground part 8 during installation, and after the to-be-ground part 8 is placed, driving three clamping jaws 503 to extend through a rotary oil cylinder 508 to clamp and position the to-be-ground part 8;

secondly, adjusting the positions of the workpiece to be ground 8 and the grinder 2, starting a translation driving motor 301 on the translation mechanism 3 to drive a ball screw 304 to rotate, driving a moving seat 302 to horizontally move through a driving block 308, gradually approaching the grinder and reaching a set position;

then, the height of the piece to be ground 8 is adjusted, the lifting driving motor 401 is started, and the lifting frame 403 is driven to move up and down through a synchronous belt and a lifting ball screw, so that the grinding function of the piece to be ground 8 at different heights is realized;

finally, after the grinding operation is carried out and the position is adjusted in place, the grinding wheel driving motor 201 is started, the grinding wheel 202 is driven to rotate at a high speed through the grinding wheel shaft, and then the grinding operation is carried out on the workpiece 8 to be ground; the height of the member to be ground 8 is adjustable during grinding.

In the grinding of complex nearly circular (including different workpieces such as a perfect circle, an ellipse, a gear type and the like), a workpiece rotation driving motor is started and operates simultaneously with a translation driving motor and a lifting driving motor, and the three motors act simultaneously according to program contents in the grinding process, so that the grinding of complex outer contours is realized.

According to the invention, through the design of the translation mechanism 3, the lifting mechanism 4 and the rotating mechanism 5, the adjustment of the horizontal linear distance and the lifting height is realized, and the rapid and accurate positioning of the to-be-ground part 8 is realized. The automatic control is realized in the above operation processes, the excessive participation of workers is avoided, the machining process is more stable, and the grinding quality is ensured.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. An automatic grinding machine is characterized in that: the grinding machine comprises an equipment base (1), a grinding wheel mechanism (2) and a to-be-ground part positioning device, wherein the grinding wheel mechanism (2) is installed on the left side of the equipment base (1), the to-be-ground part positioning device is installed on the right side of the equipment base (1), a to-be-ground part (8) is installed at the top of the to-be-ground part positioning device and is adjusted to be parallel and level with the working end of the grinding wheel mechanism (2) through translation and lifting, the periphery of the equipment base (1) is connected with a whole machine shell (6) for protection, one side of the whole machine shell (6) is provided with a whole machine electric control cabinet, the top of the whole machine electric control cabinet is provided with a liquid crystal operation display screen, and all driving components on the to-be-ground part positioning device are electrically connected with the whole machine electric control cabinet.

2. The automatic grinder of claim 2, wherein: treat to grind a positioner and include translation mechanism (3), elevating system (4) and rotary mechanism (5), translation mechanism (3) are installed on the top surface of equipment base (1), elevating system (4) are installed on translation mechanism (3), rotary mechanism (5) are installed the top of elevating system (4), treat to grind a (8) and install on rotary mechanism (5) to through translation, lift adjustment extremely with the work end parallel and level of emery wheel mechanism (2).

3. The automatic grinder of claim 2, wherein: grinding wheel mechanism (2) include emery wheel driving motor (201), emery wheel (202) and emery wheel support (204), emery wheel (202) is rotatable to be installed the top of emery wheel support (204), the one end of the emery wheel axle of emery wheel (202) with emery wheel driving motor (201) transmission is connected, install through installation base (206) the bottom of emery wheel support (204) on equipment base (1).

4. The automatic grinder of claim 3, wherein: the periphery of the grinding wheel (202) is provided with a grinding wheel protective cover (203) for protection, a dust collecting pipe (205) is connected to the side lower part of the grinding wheel protective cover (203), and a dust remover is installed at the tail end of the dust collecting pipe (205).

5. The automatic grinder of claim 2, wherein: the translation mechanism (3) comprises a translation driving motor (301), a moving seat (302) and a ball screw (304), the translation driving motor (301) is installed on the equipment base (1), an output shaft of the translation driving motor (301) is in transmission connection with the ball screw (304), a driving block (308) is arranged at the bottom of the moving seat (302), and the ball screw (304) is connected with the driving block (308) through threads; two ends of the ball screw (304) are supported and positioned through a front support (303) and a rear support (305), and a guide mechanism is arranged at the bottom of the moving seat (302).

6. The automatic grinder of claim 5, wherein: the guide mechanism comprises a translation guide rail (306) and a guide block (307), the translation guide rail (306) is provided with two guide rails and is arranged in parallel with the ball screw (304), the translation guide rail (306) is connected to the equipment base (1) through a bolt, the guide block (307) is connected to the bottom plane of the moving seat (302), and the guide block (307) is matched with the translation guide rail (306).

7. The automatic grinder of claim 5, wherein: the lifting mechanism (4) comprises a lifting driving motor (401), a lifting fixed frame (402) and a lifting frame (403), the bottom of the lifting fixed frame (402) is connected to the movable base (302), the lifting frame (403) is slidably connected to the inside of the lifting fixed frame (402), a lifting ball screw (406) is arranged on one side, close to the lifting driving motor (401), of the lifting frame (403), a driven synchronizing wheel is mounted on the lifting ball screw (406), a driving synchronizing wheel is connected to a rotating shaft of the lifting driving motor (401), the driving synchronizing wheel and the driven synchronizing wheel are in transmission connection through a synchronous belt (405), a screw nut (407) is connected to the bottom of the lifting frame (403), and the screw nut (407) is in threaded connection with the lifting ball screw (406); and a lifting guide mechanism is arranged between the lifting frame (403) and the front and back matching surfaces of the lifting fixing frame (402).

8. The automatic grinder of claim 7, wherein: the lifting guide mechanism comprises a lifting slide rail (404) and a sliding block which are matched with each other, the lifting slide rail (404) is connected to the front side and the rear side of the lifting frame (403) through bolts, the sliding block is connected to the inner side of the lifting fixed frame (402) through screws, and two sets of parallel lifting slide rails (404) and sliding blocks are arranged on each side.

9. The automatic grinder of claim 8, wherein: the rotating mechanism (5) comprises a rotating driving motor (501), a three-jaw chuck (502) and a high-precision rotary table (504), the rotating driving motor (501) is installed on the high-precision rotary table (504) and is in transmission connection with the input end of the high-precision rotary table (504), the three-jaw chuck (502) is installed on the output end of the high-precision rotary table (504), and the driving motor (501) is started to drive the three-jaw chuck (502) and a piece to be ground to rotate synchronously through the rotating operation of the high-precision rotary table (504); install high accuracy revolving stage (504) on crane (403), just high accuracy revolving stage (504) sets up to hollow structure, install chuck connecting seat (505) on high accuracy revolving stage (504), just chuck connecting seat (505) through connection be in the cavity of high accuracy revolving stage (504), three-jaw chuck (502) are installed chuck connecting seat (505) top, the top of chuck connecting seat (505) is connected with gyration hydro-cylinder (508) through chuck connecting piece (507), the work end of gyration hydro-cylinder (508) links together through chuck connecting rod (506) and three-jaw chuck (502) at top, chuck connecting rod (506) are followed the center of chuck connecting seat (505) is run through and is crossed, gyration hydro-cylinder (508) are located the inside of crane (403), gyration hydro-cylinder (508) are through oil pipe and hydraulic pressure station (7) intercommunication, the hydraulic station (7) is installed on the equipment base (1) and is arranged side by side with the grinding wheel mechanism (2).

10. The automatic grinder of claim 9, wherein: the rotary oil cylinder (508) is driven by a chuck connecting rod (506) to complete positioning operation of the three-jaw chuck (502), the three-jaw chuck (502) comprises a chuck body and three clamping jaws (503), the clamping jaws (503) are uniformly distributed and connected on the chuck body in a circumferential manner, and the clamping jaws (503) slide linearly along respective slide ways.