CN116533117A - Numerical control grinding machine - Google Patents

Abstract

The invention relates to the technical field of grinding machines, in particular to a numerical control grinding machine. The invention provides a numerical control grinding machine which comprises a shell, an integrated controller, a mounting block, a grinding assembly, a stepping motor, a rotating table and the like, wherein the integrated controller is fixedly arranged on the shell, the mounting block is fixedly arranged in the shell, the grinding assembly for grinding a workpiece is arranged on the mounting block, the stepping motor for driving rotation is fixedly arranged on the mounting block, the stepping motor is electrically connected with the integrated controller, and the rotating table is rotatably arranged on the mounting block. According to the invention, the first ejector rod pushes the second limiting block to push the workpiece to be processed to the first limiting block when the rotary table rotates, the stop block is used for assisting in workpiece alignment, so that the accuracy of the workpiece placement position is ensured, and meanwhile, the ejector rod pushes the wedge block to move when the rotary table rotates, so that the workpiece is fixed in the polishing process, the workpiece is prevented from shifting in the polishing process, and the polishing precision of the workpiece is ensured.

Description

Numerical control grinding machine

Technical Field

The invention relates to the technical field of grinding machines, in particular to a numerical control grinding machine.

Background

The numerical control grinding machine is a high-precision grinding machine, is mainly used for processing workpieces such as high-precision metal, nonmetal and composite materials, and the working principle of the numerical control grinding machine is that the movement track of a grinding head is controlled through a numerical control system, and the grinding surface is matched with the size and the shape in a design drawing, so that the processing efficiency and the processing precision can be greatly improved.

According to the chinese patent publication CN218746896U, a numerically controlled grinder is proposed, which comprises a frame, a fixed frame and a movable frame, wherein the fixed frame is welded at one end of the top of the frame, the movable frame is movably arranged at the other end of the top of the frame, and a first motor is fixedly connected to one side of the fixed frame and one side of the movable frame.

The above patent, although capable of realizing polishing processing of a workpiece, in the actual use process, needs to constantly adjust the position of the workpiece on the grinding wheel when the workpiece is placed, and the workpiece is easily displaced when the grinding wheel is polished, so that uneven polishing occurs, which affects the processing precision of the workpiece, causing unnecessary loss.

Disclosure of Invention

The invention aims to overcome the defects that the prior device needs to continuously adjust the position of a workpiece on a grinding wheel when the workpiece is placed, and the workpiece is easy to shift when the grinding wheel is used for grinding, so that the grinding is uneven and the processing precision of the workpiece is affected.

The technical implementation scheme of the invention is as follows: the utility model provides a numerically controlled grinder, including the shell, integrated control ware, installation piece and polishing assembly, fixed mounting has integrated control ware on the shell, fixed mounting has the installation piece in the shell, be equipped with the polishing assembly that is used for polishing to the work piece on the installation piece, still including step motor, the revolving stage, platform and spacing subassembly polish, fixed mounting has the step motor that is used for driving rotatoryly on the installation piece, step motor and integrated control ware electric connection, install the revolving stage on the installation piece rotation type, step motor's output shaft and revolving stage fixed connection, fixed mounting has the platform of polishing that is used for placing the work piece on the revolving stage, be equipped with the spacing subassembly that is used for carrying out spacing to the work piece on every polishing bench respectively.

Optionally, the polishing assembly is including erection column one, a polisher, erection column two, no. two polishers, erection column three and No. three polishers, fixed mounting has erection column one on the erection block, sliding type installs the No. one polisher that is used for carrying out first polishing to the work piece on the erection column one, no. one polisher and integrated controller electric connection, fixed mounting has erection column two on the erection block, sliding type installs the No. two polishers that are used for carrying out the second polishing to the work piece on the erection column two, no. two polisher and integrated controller electric connection, fixed mounting has erection column three on the erection block, sliding type installs the No. three polisher that is used for carrying out third polishing to the work piece on the erection column three, no. three polisher and integrated controller electric connection.

Optionally, the spacing subassembly is including stopper first, stopper second, guide bar first and return spring first, and one side that every platform of polishing is close to each other is symmetrical fixed mounting respectively has stopper first, and one side that every platform of polishing is kept away from each other is symmetrical sliding type respectively and is installed stopper second, and one side that every platform of polishing kept away from each other is symmetrical fixedly connected with respectively and is used for the guide bar first that leads, and the stopper is located directly over corresponding guide bar first, and stopper second is connected with corresponding guide bar first slidingly, is equipped with return spring first between the junction of every stopper second and corresponding platform of polishing respectively fixedly.

Optionally, still including dust collecting mechanism, dust collecting mechanism is including the deflector, electric putter, the roof, the scraper blade, return spring two and dust collection box, fixed mounting has the deflector that is used for carrying out the direction to the piece of polishing between two adjacent polishing tables respectively, revolving stage fixed mounting has electric putter, electric putter all with integrated control ware electric connection, electric putter is located the roof that is used for promoting the piece of polishing under the corresponding deflector respectively, fixedly connected with respectively on every electric putter's the telescopic link, the roof all is located towards the centre of a circle of revolving stage, every roof symmetry sliding type is connected with the scraper blade respectively, fixed return spring two that is equipped with between two scrapers, install dust collection box on the revolving stage slidingtype.

Optionally, each guide plate is inclined towards the dust collecting box.

Optionally, the rotary table comprises a fixing mechanism, the fixing mechanism comprises a first ejector block, a connecting block, a guide post, ejector rods, a second guide rod, a first reset spring, a second ejector block, wedge blocks and a second reset spring, the first ejector block is fixedly installed in a shell, a second limiting block on the left side of each polishing table is contacted with the first ejector block in sequence when the rotary table rotates, the connecting blocks are fixedly connected between the two limiting blocks on the same side respectively, the guide post is fixedly installed in the shell, the upper part of the guide post is respectively provided with a guide groove, the ejector rods are respectively connected with each polishing table in a sliding manner, the ejector rods are contacted with the guide grooves when the rotary table rotates, the second guide rod is respectively fixedly connected with the second guide rod, the first reset spring is respectively fixedly arranged between the connecting part of each guide rod and each polishing table, the second wedge blocks are respectively connected with the second wedge blocks in a sliding manner, the lower part of each wedge block is respectively fixedly connected with the second ejector rods, and the corresponding two ejector rods are contacted with the two wedge blocks when the wedge blocks move.

Optionally, the device further comprises an ash removing mechanism, the ash removing mechanism comprises a telescopic air cylinder, an air guide box, an air guide pipe, an air nozzle and a one-way valve, the first mounting column is provided with the telescopic air cylinder which is used for inflating in a sliding mode, the first grinding machine is provided with the telescopic air cylinder which is extruded when moving downwards, the third mounting column is provided with the telescopic air cylinder which is extruded when moving downwards, the two telescopic air cylinders are respectively and fixedly connected with the air guide boxes, one sides of the two air guide boxes, which are close to each other, are respectively and fixedly connected with the air guide pipes, the other ends of the two air guide pipes are respectively and fixedly connected with the air nozzle which is used for evenly spraying air, and one sides of the two air guide boxes, which are close to each other, are respectively and fixedly provided with the one-way valve which is used for controlling the air flow direction.

Optionally, the polishing machine further comprises a stop block, and each polishing table is symmetrically and fixedly provided with the stop block.

Compared with the prior art, the invention has the following advantages: according to the invention, the first ejector rod pushes the second limiting block to push the workpiece to be processed to the first limiting block when the rotary table rotates, the stop block is used for assisting in workpiece alignment, so that the accuracy of the workpiece placement position is ensured, and meanwhile, the ejector rod pushes the wedge block to move when the rotary table rotates, so that the workpiece is fixed in the polishing process, the workpiece is prevented from shifting in the polishing process, and the polishing precision of the workpiece is ensured.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of a polishing assembly according to the present invention.

Fig. 3 is a schematic perspective view of a limiting assembly according to the present invention.

Fig. 4 is a schematic perspective view of the dust collecting mechanism of the present invention.

Fig. 5 is a schematic view of a partial perspective structure of the dust collecting mechanism of the present invention.

Fig. 6 is a schematic perspective view of the fixing mechanism of the present invention.

Fig. 7 is a schematic perspective view of a guide post according to the present invention.

Fig. 8 is a schematic cross-sectional perspective view of the fixing mechanism of the present invention.

Fig. 9 is a schematic partial perspective view of the fixing mechanism of the present invention.

Fig. 10 is a schematic perspective view of the ash removing mechanism of the present invention.

FIG. 11 is a schematic cross-sectional view of the ash removal mechanism of the present invention.

The marks of the components in the drawings are as follows: 1: a housing, 2: integrated controller, 3: mounting block, 401: mounting post one, 402: number one sander, 403: mounting post two, 404: no. two polisher, 405: mounting post three, 406: no. three polisher, 501: step motor, 502: rotating table, 503: polishing table, 601: stopper one, 602: limiting block II, 603: guide bar one, 604: return spring one, 701: guide plate, 702: electric putter, 703: top plate, 704: blade, 705: return spring two, 706: dust box, 801: top block one, 802: connecting block, 803: guide post, 804: guide groove, 805: ejector pin, 806: guide bar two, 807: return spring one, 808: top block two, 809: wedge block, 810: reset spring two, 901: telescoping cylinder, 902: air guide box, 903: airway tube, 904: air nozzle, 905: check valve, 10: and a stop block.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1: 1-3, including shell 1, integrated control ware 2, the installation piece 3, the subassembly of polishing, step motor 501, revolving stage 502, the platform 503 and spacing subassembly polish, the preceding left side of shell 1 is installed integrated control ware 2 through the bolt, install installation piece 3 through the bolt in the shell 1, be equipped with the subassembly of polishing that is used for polishing the work piece on the installation piece 3, step motor 501 is installed through the bolt in the middle department of installation piece 3 top surface, step motor 501 and integrated control ware 2 electric connection, revolving stage 502 is installed in the top surface rotation of installation piece 3, step motor 501's output shaft passes through the shaft coupling with the center department of revolving stage 502 bottom surface, step motor 501 will drive revolving stage 502 and carries out 90 degrees rotations in proper order, install four platform 503 of polishing through the bolt along circumference on the revolving stage 502, treat that the machined part will place on polishing bench 503, be equipped with the spacing subassembly that is used for spacing the work piece on every platform 503 respectively.

As shown in fig. 1 and 3, the limiting component includes a first limiting block 601, a second limiting block 602, a first guiding rod 603 and a first return spring 604, the first limiting block 601 is symmetrically installed on one side of each grinding table 503, which is close to each other, through bolts, the first limiting block 601 limits the position of a workpiece to be processed, the second limiting block 602 is symmetrically installed on one side of each grinding table 503, which is far away from each other, respectively, the first guiding rod 603 is symmetrically connected on one side of each grinding table 503, the second limiting block 602 is located right above the corresponding guiding rod 603, the second limiting block 602 is slidably connected with the corresponding guiding rod 603, the second limiting block 602 moves along the corresponding guiding rod 603, and the first return spring 604 is fixedly arranged between the connecting part of each second limiting block 602 and the corresponding grinding table 503.

As shown in fig. 1, fig. 6, fig. 7, fig. 8 and fig. 9, the device further comprises a fixing mechanism, the fixing mechanism comprises a first ejector block 801, a connecting block 802, guide posts 803, ejector rods 805, a second guide rod 806, a first return spring 807, a second ejector block 808, wedge-shaped blocks 809 and a second return spring 810, the first ejector block 801 is mounted on the inner front side of the shell 1 through bolts, the second limiting block 602 on the left side of each polishing table 503 is sequentially contacted with the first ejector block 801 when the rotary table 502 rotates, connecting blocks 802 are respectively connected between the two limiting blocks 602 on the same side through bolts, guide posts 803 are mounted on the inner front side of the shell 1 in a bilateral symmetry manner through bolts, guide grooves 804 are respectively symmetrically arranged on the upper portion of each guide post 803, ejector rods 805 are respectively connected with the guide grooves 804 in a sliding manner, the ejector rods 805 are contacted with the guide grooves 804 when the guide rods 503 rotate, the guide posts 805 are respectively contacted with the wedge-shaped blocks 805 on the guide rods 503, the wedge-shaped blocks 808 are respectively connected with the two adjacent polishing blocks 503 in a sliding manner when the two guide rods 809 are respectively connected with the two wedge-shaped blocks 803 in a sliding manner.

As shown in fig. 1 and 8, the polishing machine further comprises a stop block 10, wherein the stop block 10 is symmetrically arranged on the rear part of the top surface of each polishing table 503 through bolts, and the stop blocks 10 are used for being matched with a to-be-processed workpiece.

In the initial state, the guide post 803 pushes the corresponding ejector rod 805 on the polishing table 503 in front through the guide groove 804, the ejector rod 805 moves backward along the corresponding second guide rod 806, the first return spring 807 is in a compressed state, the ejector rod 805 pushes the corresponding second ejector block 808 to move downward, the second ejector block 808 drives the corresponding wedge block 809 to move downward synchronously, and the second return spring 810 is in a compressed state, so that the workpiece to be processed is conveniently placed on the polishing table 503.

When the workpiece is required to be polished, the workpiece to be processed is slidably placed on the polishing table 503 until the first limiting block 601 is propped up, and the stop block 10 also assists a worker in accurately placing the workpiece to be processed on the polishing table 503, so that the workpiece to be processed is prevented from being deviated.

Example 2: on the basis of embodiment 1, as shown in fig. 1 and 2, the polishing assembly comprises a first mounting column 401, a first polishing machine 402, a second mounting column 403, a second polishing machine 404, a third mounting column 405 and a third polishing machine 406, wherein the first mounting column 401 is mounted on the left part of the top surface of the mounting block 3 through bolts, the first polishing machine 402 is slidably mounted on the right side of the first mounting column 401, the first polishing machine 402 is electrically connected with the integrated controller 2, the second mounting column 403 is mounted on the rear part of the top surface of the mounting block 3 through bolts, the second polishing machine 404 is slidably mounted in front of the second mounting column 403, the second polishing machine 404 is electrically connected with the integrated controller 2, the third mounting column 405 is mounted on the right part of the top surface of the mounting block 3 through bolts, the third polishing machine 406 is slidably mounted on the left side of the third mounting column 405, and the third polishing machine 406 is electrically connected with the integrated controller 2.

As shown in fig. 1, fig. 4 and fig. 5, the dust collecting device further comprises a dust collecting mechanism, the dust collecting mechanism comprises a guide plate 701, electric push rods 702, top plates 703, scraping plates 704, return springs II 705 and dust collecting boxes 706, the guide plate 701 is mounted between two adjacent grinding tables 503 through bolts, four electric push rods 702 are mounted on the rotating table 502 along the circumferential direction through bolts, the electric push rods 702 are respectively located right below the corresponding guide plates 701, the top plates 703 are respectively connected to telescopic rods of each electric push rod 702 through bolts, the top plates 703 face the circle center of the rotating table 502, the electric push rods 702 can drive the corresponding top plates 703 to push the circle center of the rotating table 502, the scraping plates 704 are respectively symmetrically and slidingly connected with the return springs II 705 are fixedly arranged between the two scraping plates 704, the dust collecting boxes 706 are slidingly mounted at the center of the rotating table 502, and the polishing chips fall into the dust collecting boxes 706 along the inclined planes of the guide plates 701.

As shown in fig. 1, 10 and 11, the dust removing device further comprises a dust removing mechanism, the dust removing mechanism comprises a telescopic air cylinder 901, an air guide box 902, an air guide tube 903, an air nozzle 904 and a one-way valve 905, wherein the telescopic air cylinder 901 is installed on the right surface of the first mounting column 401 in a sliding mode, the telescopic air cylinder 901 is extruded when the first grinding machine 402 moves downwards, the telescopic air cylinder 901 is installed on the left surface of the third mounting column 405 in a sliding mode, the telescopic air cylinder 901 is extruded when the third grinding machine 406 moves downwards, the air guide boxes 902 are respectively and hermetically connected to the bottoms of the two telescopic air cylinders 901, one sides of the two air guide boxes 902, which are close to each other, are respectively and hermetically connected with the air guide tubes 903, the other ends of the two air guide tubes 903 are respectively and fixedly connected with the air nozzle 904 through bolts, during extrusion, air in the telescopic air cylinder 901 is extruded into the air guide boxes 902, then is sprayed out from the air nozzle 904 to the corresponding grinding table 503 through the air guide tubes 903, when the telescopic air guide boxes, the side, which is close to each other, the one side, which is respectively, the one-way valve 901 is installed through bolts, and when the telescopic air cylinder 901 is reset upwards, the corresponding one-way valve 905 is again, air outside the air cylinder 901, and the air is sucked into the air cylinder, so that circulation is realized.

After finishing placing the workpiece, the integrated controller 2 starts a polishing program, the integrated controller 2 starts the stepping motor 501 to rotate 90 degrees clockwise, the stepping motor 501 drives the rotary table 502 to rotate 90 degrees synchronously, the polishing table 503 after placing the workpiece is moved to the position right below the first polishing machine 402, in the rotating process of the rotary table 502, the first top block 801 moves the second top-moving limiting block 602 towards the first limiting block 601, the connecting block 802 ensures that the second two limiting blocks 602 can synchronously push the workpiece to the first limiting block 601, so that the position of the workpiece is guaranteed, meanwhile, the guide groove 804 of the guide post 803 also loses the state of being in contact with the corresponding ejector rod 805, the first reset spring 807 resets to drive the ejector rod 805 to move outwards, and the second reset spring 810 resets to drive the second top block 808 and the corresponding wedge block 809 to move upwards after losing the top movement of the ejector rod 805, so as to clamp the workpiece to be clamped, and the fixing of the workpiece to be machined is completed.

When the polishing table 503 for placing a workpiece is moved to the position right below the first polishing machine 402, the first polishing machine 402 is started by the integrated controller 2, the first polishing machine 402 moves downwards along the first mounting column 401 so as to start polishing the workpiece, the telescopic air cylinder 901 is extruded in the process of moving downwards the first polishing machine 402, air in the telescopic air cylinder 901 is extruded into the air guide box 902, and then is sprayed out from the air nozzle 904 to the corresponding polishing table 503 through the air guide pipe 903, so that scraps generated during polishing fall on the rotary table 502 along the inclined plane of the corresponding guide plate 701, the telescopic air cylinder 901 synchronously resets upwards when the first polishing machine 402 moves upwards, the corresponding one-way valve 905 is used for pumping outside air into the telescopic air cylinder 901 again so as to realize circulation of air, and during polishing, the integrated controller 2 starts the electric push rod 702 so that the corresponding top plate 703 is pushed to the direction of the dust collecting box 706 along 502, the elasticity of the return spring II 705 can ensure that the scraping plate 704 is always attached to the corresponding polishing table, so that the fallen scraps are pushed into the dust collecting box 706 to be cleaned, and the dust collecting box 706 can be cleaned after the dust collecting is completed.

After polishing of the first polishing machine 402 is completed, the integrated controller 2 starts the stepping motor 501 to rotate clockwise by 90 degrees, so that the workpiece is driven to move to the position right below the second polishing machine 404, the integrated controller 2 starts the second polishing machine 404 to polish the workpiece at different angles, after polishing of the second time is completed, the integrated controller 2 starts the stepping motor 501 to rotate clockwise by 90 degrees again, so that the workpiece is driven to move to the position right below the third polishing machine 406, the integrated controller 2 starts the third polishing machine 406 to polish the workpiece at different angles, and during the period, the third polishing machine 406 can repeat the step of the first polishing machine 402 to squeeze the corresponding telescopic air cylinder 901, so that scraps generated by polishing are blown down, the effect of polishing is prevented from being influenced by the scraps, and the polishing quality of the workpiece is ensured.

After the workpiece is polished three times, the controller starts the stepping motor 501 to rotate clockwise for 90 degrees, so that the polished workpiece is driven to move to an initial position, the guide post 803 can push the corresponding ejector rod 805 on the polishing table 503 again through the guide groove 804, the ejector rod 805 moves backwards along the corresponding guide rod II 806, the first return spring 807 is compressed, the ejector rod 805 pushes the corresponding second ejector block 808 to move downwards, the second ejector block 808 drives the corresponding wedge block 809 to move downwards synchronously, the second return spring 810 is compressed, and therefore the fixation of the polished workpiece is relieved, the workpiece is conveniently taken down by a worker, and polishing processing steps of one workpiece are completed.

It is to be understood that the above description is intended to be illustrative only and is not intended to be limiting. Those skilled in the art will appreciate variations of the present invention that are intended to be included within the scope of the claims herein.

Claims (8)

1. The utility model provides a numerically controlled grinder, including shell (1), integrated control ware (2), installation piece (3) and polishing assembly, fixed mounting has integrated control ware (2) on shell (1), and fixed mounting has installation piece (3) in shell (1), is equipped with on installation piece (3) and is used for polishing the subassembly, characterized by to the work piece: still including step motor (501), revolving stage (502), platform (503) and spacing subassembly polish, fixed mounting has step motor (501) that are used for driving the rotation on installation piece (3), step motor (501) and integrated controller (2) electric connection, revolving stage (502) are installed to the rotation on installation piece (3), the output shaft and revolving stage (502) fixed connection of step motor (501), fixed mounting has platform (503) of polishing that are used for placing the work piece on revolving stage (502), be equipped with on every platform (503) of polishing respectively and be used for carrying out spacing subassembly to the work piece.

2. A numerically controlled grinder as set forth in claim 1, wherein: the polishing assembly comprises a first mounting column (401), a second mounting column (403), a second polishing column (404), a third mounting column (405) and a third polishing column (406), wherein the first mounting column (401) is fixedly mounted on the mounting block (3), the first polishing column (402) for polishing a workpiece for the first time is slidably mounted on the first mounting column (401), the second mounting column (403) is fixedly mounted on the mounting block (3), the second polishing column (404) for polishing the workpiece for the second time is slidably mounted on the second mounting column (403), the third mounting column (405) is electrically connected with the integrated controller (2), the third polishing column (406) for polishing the workpiece for the third time is slidably mounted on the third mounting column (405), and the third polishing column (406) is electrically connected with the integrated controller (2).

3. A numerically controlled grinder as set forth in claim 2, wherein: the limiting component comprises a first limiting block (601), a second limiting block (602), a first guide rod (603) and a first return spring (604), wherein the first limiting block (601) is symmetrically and fixedly installed on one side, close to each other, of each grinding table (503), the second limiting block (602) is symmetrically and slidingly installed on one side, far away from each other, of each grinding table (503), the first guide rod (603) for guiding is symmetrically and fixedly connected on one side, far away from each other, of each grinding table (503), the second limiting block (602) is located right above the corresponding first guide rod (603), the second limiting block (602) is slidably connected with the corresponding first guide rod (603), and the first return spring (604) is fixedly arranged between the connecting part of each second limiting block (602) and the corresponding grinding table (503).

4. A numerically controlled grinder as set forth in claim 3, wherein: still including dust collection mechanism, dust collection mechanism is including deflector (701), electric putter (702), roof (703), scraper blade (704), return spring two (705) and dust collecting box (706), fixed mounting has deflector (701) that are used for carrying out the direction to the piece of polishing between two adjacent polishing tables (503) respectively, revolving stage (502) fixed mounting has electric putter (702), electric putter (702) all with integrated control ware (2) electric connection, electric putter (702) are located respectively under corresponding deflector (701), be used for promoting roof (703) of piece of polishing on the telescopic link of every electric putter (702) respectively fixedly connected with, centre of a circle department of roof (703) all orientation revolving stage (502), every roof (703) are connected with scraper blade (704) respectively symmetrical sliding type, be equipped with return spring two (705) between two scraper blades (704) fixedly, install dust collecting box (706) on revolving stage (502) sliding type.

5. A numerically controlled grinder as set forth in claim 4, wherein: each guide plate (701) is inclined towards the dust collection box (706).

6. A numerically controlled grinder as set forth in claim 5, wherein: the polishing device also comprises a fixing mechanism, the fixing mechanism comprises a first ejector block (801), a connecting block (802), a guide post (803), a push rod (805), a second guide rod (806), a first return spring (807), a second ejector block (808), a wedge block (809) and a second return spring (810), the first ejector block (801) is fixedly arranged in a shell (1), a second limiting block (602) on the left side of each polishing table (503) is sequentially contacted with the first ejector block (801) when the rotary table (502) rotates, the connecting blocks (802) are respectively and fixedly connected between the two limiting blocks (602) on the same side, the guide post (803) is fixedly arranged in the shell (1), the upper part of each guide post (803) is respectively provided with a guide groove (804), the push rod (805) is respectively and slidably connected with the push rod (805) on each polishing table (503), the push rod (805) is respectively and fixedly connected with the first guide rod (503) when the push rod (806) rotates, a second return spring (810) is arranged between the connection part of each wedge block (809) and the polishing table (503), a second top block (808) is fixedly connected below each wedge block (809), and the ejector rod (805) is contacted with the corresponding second top block (808) when moving.

7. A numerically controlled grinder as set forth in claim 6, wherein: still including deashing mechanism, deashing mechanism is including flexible inflator (901), air guide box (902), air duct (903), air nozzle (904) and check valve (905), install on erection column one (401) slidingtype and be used for inflated flexible inflator (901), will extrude flexible inflator (901) when being moved down by mill number one (402), also slidingtype is installed on erection column three (405) flexible inflator (901), also will extrude flexible inflator (901) when being moved down by mill number three (406), fixedly connected with air guide box (902) on two flexible inflator (901) respectively, one side that two air guide boxes (902) are close to each other is fixedly connected with air duct (903) respectively, the other end of two air guide pipes (903) is fixedly connected with air nozzle (904) that are used for the even blowout of air respectively, one side that two air guide boxes (902) are close to each other is fixedly installed check valve (905) that are used for controlling the air flow direction.

8. A numerically controlled grinder as set forth in claim 7, wherein: the polishing machine further comprises a stop block (10), and each polishing table (503) is symmetrically and fixedly provided with the stop block (10) respectively.