CN219293481U - Part surface polisher - Google Patents

Abstract

The utility model relates to the technical field of metal surface polishing, in particular to a part surface polishing machine, which automatically changes a polishing surface by matching a rotary jacking device, a pressing device and a horizontal clamping device; the polishing area is increased by matching the polishing device with the rotary jacking device; cooling the equipment polishing area through a cooling and dedusting device, and collecting metal dust; the device comprises a table top, a first air cylinder, a rubber compression head, a second air cylinder, a motor and a polishing disc, wherein the first air cylinder is arranged on the upper side of the middle part of the table top, the moving end of the first air cylinder points to the table top, the upper end of the rubber compression head is connected with the moving end of the first air cylinder through a bearing, the second air cylinder is arranged in front of the table top, the moving end of the second air cylinder points to the rear part of the table top, the fixed end of the reducing motor is connected with the moving end of the second air cylinder through a connecting plate, and the polishing disc is connected with the output end of the reducing motor; the device also comprises a processing table, a rotary jacking device, a pressing device, a horizontal clamping device, a polishing device and a cooling and dedusting device.

Description

Part surface polisher

Technical Field

The utility model relates to the technical field of metal surface polishing, in particular to a part surface polishing machine.

Background

The part surface grinding machine is an auxiliary device for grinding the surface of a part, and is widely used in the field of metal surface grinding; the existing part surface grinding machine comprises a table top, two groups of supporting leg plates, a first air cylinder, a first rubber compression head, a third air cylinder, a third motor and a grinding disc, wherein the upper ends of the two groups of supporting leg plates are connected with the lower end face of the table top, the fixed end of the first air cylinder is arranged on the upper side of the middle part of the table top through a bracket, the movable end of the first air cylinder is directed towards the table top, the upper end of the first rubber compression head is connected with the movable end of the first air cylinder, the fixed end of the third air cylinder is arranged in the front of the table top through a bracket, the movable end of the third air cylinder is directed towards the rear part of the table top, the fixed end of the third motor is connected with the movable end of the third air cylinder, and the grinding disc is connected with the output end of the third motor; when the existing part surface grinding machine is used, firstly, a part is placed on the lower side of a first rubber pressing head, then the first cylinder is controlled to extend to enable the first rubber pressing head to press and fix the part, then a third motor is started, the third motor is controlled to rotate a grinding disc, then the third cylinder is controlled to extend to enable the grinding disc to be in contact with the part, and the rotating grinding disc can grind a workpiece; the existing part surface polisher discovers in use, and only can polish one side of a workpiece, the polishing surface needs to be replaced manually and repeatedly by multiple sides, when the polishing surface of the workpiece is large, the large polishing disc needs to be replaced just to ensure that the whole polishing surface can be covered, metal dust generated by long-term operation of equipment can be accumulated on the surface of the equipment, and the influence on an equipment circuit is easy to cause.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a device which is fixed in position by matching a rotary jacking device, a compressing device and a horizontal clamping device, and automatically replaces a grinding surface, thereby reducing the labor intensity of operators and improving the automation degree of the device; the polishing device and the rotary jacking device are matched to polish a larger plane, so that the adaptability of the device is improved; the part surface grinding machine has the advantages that the grinding area of the equipment is cooled through the cooling and dedusting device, the metal dust content in the air is reduced, most of metal dust is collected, and the safety, the environmental protection performance and the practicability of the equipment are improved.

The utility model relates to a part surface grinding machine which comprises a table top, two groups of support leg plates, a first air cylinder, a first rubber compression head, a third air cylinder, a third motor and a grinding disc, wherein the upper ends of the two groups of support leg plates are connected with the lower end face of the table top; the device also comprises a processing table, a rotary jacking device, a compacting device, a horizontal clamping device, a polishing device and a cooling and dust removing device, wherein the processing table supports the main body of the device and provides installation and processing space for the device; the rotary jacking device is arranged on the processing table, and controls the height and rotation of the workpiece to change the polishing surface of the workpiece; the pressing device is arranged on the processing table and is matched with the rotary jacking device to press the workpiece; the horizontal clamping device is arranged on the processing table, fixes the horizontal direction of the workpiece, and controls the workpiece to rotate around a horizontal direction shaft to replace the grinding surface; the polishing device is arranged on the processing table, the workpiece is polished by the polishing device, the polishing device can transversely move, the large polishing surface is polished by the polishing device in cooperation with the rotary jacking device, the cooling and dust removing device is arranged on the processing table, the temperature of the device and the metal dust content in the air are reduced in the processing process by the cooling and dust removing device, and the metal dust is discharged out of the processing area of the device; the rotary jacking device, the pressing device and the horizontal clamping device are matched to fix the position of the equipment, and the grinding surface is automatically replaced, so that the labor intensity of operators is reduced, and the automation degree of the equipment is improved; the polishing device and the rotary jacking device are matched to polish a larger plane, so that the adaptability of the device is improved; the equipment polishing area is cooled through the cooling dust collector, and meanwhile, the metal dust content in the air is reduced, most of metal dust is collected, and the safety, environmental protection and practicability of the equipment are improved.

Preferably, the processing table comprises a table top, two groups of support leg plates, a support plate and a portal frame, wherein the upper end surfaces of the two groups of support leg plates are connected with the lower end surface of the table top, the left end and the right end of the support plate are connected with the two groups of support leg plates, the lower end surfaces of the two groups of support legs of the portal frame are connected with the upper end surface of the table top, the front part of the upper end surface of the table top is provided with a track groove, the left side and the right side of the rear part are provided with symmetrical rectangular holes, and a circular groove is arranged between the two rectangular holes at the upper end of the table top; support and installation space are provided for the horizontal clamping device through the support plate and the rectangular hole, installation space is provided for the compressing device and the cooling and dust removing device through the portal, metal dust is collected through the circular groove, installation space is provided for the polishing device through the track groove, and stability of equipment is improved.

Preferably, the rotary jacking device comprises a rotary platform, a first hydraulic cylinder and a storage plate, wherein the lower end of the rotary platform is arranged at the bottom of the circular groove, the fixed end of the first hydraulic cylinder is connected with the upper end face of the rotary platform, and the storage plate is arranged on the moving end of the first hydraulic cylinder; the workpiece is driven to rotate through the rotation of the rotating platform, so that the grinding surface of the equipment is replaced, the height change of the workpiece is controlled through the expansion and contraction of the first hydraulic cylinder, and the flexibility and the practicability of the equipment are improved.

Preferably, the pressing device comprises a first air cylinder and a first rubber pressing head, wherein the fixed end of the first air cylinder is connected with the top of the portal, and the upper end of the first rubber pressing head is connected with the moving end of the first air cylinder through a bearing; the first rubber pressing head is stretched through the first air cylinder to press and fix the workpiece, the workpiece can be rotated under the condition that the upper position and the lower position of the workpiece are fixed through the cooperation of the first rubber pressing head and the rotating platform, the multiple faces of the workpiece are polished, the labor intensity of operators is reduced, and the adaptability of equipment is improved.

Preferably, the horizontal clamping device comprises two groups of sliding plates, two groups of rotating shafts, a first gear motor, a gear, a second motor and a plurality of groups of limiting columns, wherein the two groups of sliding plates are respectively fixed in the two rectangular holes through the plurality of groups of limiting columns, the sliding plates can transversely move on the limiting columns, one end of each rotating shaft is connected with the corresponding sliding plate through a bearing, a second rubber pressing head is arranged at the other end of each rotating shaft, the two second rubber pressing heads are positioned between the two sliding plates, the output end of the first gear motor is connected with the left end face of the left sliding plate and penetrates through the right end face of the left sliding plate to be connected with the left rotating shaft, racks are arranged at the lower part of the sliding plate, the racks on the left sliding plate are positioned at the front part, the racks on the right sliding plate are positioned at the rear part, limiting blocks are arranged at the tail ends of the racks, the bottom end of each second motor is connected with the upper end face of the supporting plate, the gear is sleeved on the output end of each second motor, and the front end and the rear ends of each gear are respectively meshed with the racks on the two sliding plates; the second motor is opened, the second motor drives the gear to rotate through power transmission to the gear, the gear drives the two sliding plates to transversely move in the rectangular hole through meshing transmission with the rack, the second rubber pressing head clamps or loosens the workpiece, the first gear motor is started, the first gear motor transmits power to the second rubber pressing head through the rotating shaft to drive the clamped workpiece to rotate, the machining surface of the workpiece is changed, the labor intensity of operators is reduced, the equipment is suitable for various working conditions, and the adaptability and the practicability of the equipment are improved.

Preferably, the polishing device comprises a sliding block, a second air cylinder, a third motor, a flushing plate, a liquid inlet and a polishing disc, wherein the lower part of the sliding block is arranged in a track groove, the second air cylinder is arranged on the upper end surface of a table top and is positioned on the right side of the track groove, the output end of the second air cylinder is connected with the right end surface of the sliding block, the fixed end of the third air cylinder is arranged on the upper part of the rear end of the third air cylinder through a base, the fixed end of the third motor is connected with the movable end of the third air cylinder through a mounting plate, and the polishing disc is arranged on the output end of the third motor; and the third motor is started, the third motor drives the polishing disc to rotate by transmitting power to the polishing disc, the polishing disc contacts a workpiece to polish the surface of the workpiece by controlling the extension of the third cylinder, the polishing disc has transverse movement capability by controlling the extension of the second cylinder, the polishing coverage area of equipment is increased by matching the second cylinder with the first hydraulic cylinder, and the adaptability and the practicability of the equipment are improved.

Preferably, the cooling and dedusting device comprises a water tank, a valve and a flushing plate, wherein the water tank is arranged at the upper end of a portal, the upper end of the water tank is provided with a water inlet, the bottom of the front end of the water tank is provided with a water outlet pipe, the water outlet pipe is provided with the valve, the rear end face of a third motor is connected with the flushing plate, the upper end of the flushing plate is provided with a liquid inlet, the rear end of the flushing plate is provided with a water spray port, the water outlet of the water tank is connected with the liquid inlet through a hose, the output end of the third motor passes through the flushing plate and is connected with a polishing disc, the front part of the circular groove is provided with a diversion hole, and the other end of the diversion hole extends to the front part of the lower end face of the table top; the cooling liquid is stored through the water tank, the valve is opened, the cooling liquid is input into the flushing plate through the hose and flows out from the water jet of the flushing plate, the cooling liquid cools the polishing disc, and meanwhile, metal dust generated in the processing process of the polishing disc is flushed out and flows into the circular groove, and flows out of the processing area of the equipment from the guide hole.

Compared with the prior art, the utility model has the beneficial effects that: the rotary jacking device, the pressing device and the horizontal clamping device are matched to fix the position of the equipment, and the grinding surface is automatically replaced, so that the labor intensity of operators is reduced, and the automation degree of the equipment is improved; the polishing device and the rotary jacking device are matched to polish a larger plane, so that the adaptability of the device is improved; the equipment polishing area is cooled through the cooling dust collector, and meanwhile, the metal dust content in the air is reduced, most of metal dust is collected, and the safety, environmental protection and practicability of the equipment are improved.

Drawings

FIG. 1 is a schematic view of a first cross-sectional structure of the present utility model;

FIG. 2 is a schematic diagram of a second cross-sectional structure of the present utility model;

FIG. 3 is a schematic view of the structure of the water tank of the present utility model;

FIG. 4 is a schematic diagram of a sliding plate gear drive of the present utility model;

FIG. 5 is a schematic diagram of a mesa structure of the present utility model;

FIG. 6 is a schematic view of the bottom structure of the mesa of the present utility model;

the reference numerals in the drawings: 1. a table top; 2. a leg plate; 3. a support plate; 4. a door frame; 5. a track groove; 6. a deflector aperture; 7. a rectangular hole; 8. a circular groove; 9. rotating the platform; 10. a first hydraulic cylinder; 11. a storage plate; 12. a first cylinder; 13. a first rubber compression head; 14. a sliding plate; 15. a rotating shaft; 16. a second rubber compression head; 17. a first gear motor; 18. a rack; 19. a gear; 20. a second motor; 21. a limit column; 22. a slide block; 23. a second cylinder; 24. a third cylinder; 25. a third motor; 26. a flush plate; 27. a liquid inlet; 28. polishing the grinding disc; 29. a water tank; 30. a valve; 31. and a limiting block.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. This utility model may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The utility model relates to a part surface grinding machine, which comprises a table top 1, two groups of support leg plates 2, a first air cylinder 12, a first rubber compression head 13, a third air cylinder 24, a third motor 25 and a grinding disc 28, wherein the upper ends of the two groups of support leg plates 2 are connected with the lower end surface of the table top 1, the fixed end of the first air cylinder 12 is arranged on the upper side of the middle part of the table top 1, the moving end of the first air cylinder 12 points to the table top 1, the upper end of the first rubber compression head 13 is connected with the moving end of the first air cylinder 12 through a bearing, the fixed end of the third air cylinder 24 is arranged at the front part of the table top 1, the moving end of the third air cylinder 24 points to the rear part of the table top 1, the fixed end of the third motor 25 is connected with the moving end of the third air cylinder 24 through a connecting plate, and the grinding disc 28 is connected with the output end of the third motor 25; the device also comprises a processing table, a rotary jacking device, a compacting device, a horizontal clamping device, a polishing device and a cooling and dust removing device, wherein the processing table supports the main body of the device and provides installation and processing space for the device; the rotary jacking device is arranged on the processing table, and controls the height and rotation of the workpiece to change the polishing surface of the workpiece; the pressing device is arranged on the processing table and is matched with the rotary jacking device to press the workpiece; the horizontal clamping device is arranged on the processing table, fixes the horizontal direction of the workpiece, and controls the workpiece to rotate around a horizontal direction shaft to replace the grinding surface; the polishing device is arranged on the processing table, the workpiece is polished by the polishing device, the polishing device can transversely move, the large polishing surface is polished by the polishing device in cooperation with the rotary jacking device, the cooling and dust removing device is arranged on the processing table, the temperature of the device and the metal dust content in the air are reduced in the processing process by the cooling and dust removing device, and the metal dust is discharged out of the processing area of the device; the processing table comprises a table top 1, two groups of support leg plates 2, a support plate 3 and a door frame 4, wherein the upper end faces of the two groups of support leg plates 2 are connected with the lower end face of the table top 1, the left end and the right end of the support plate 3 are connected with the two groups of support leg plates 2, the lower end faces of the two groups of support legs of the door frame 4 are connected with the upper end face of the table top 1, the front part of the upper end face of the table top 1 is provided with a track groove 5, the left side and the right side of the rear part are provided with symmetrical rectangular holes 7, and a circular groove 8 is arranged between the two rectangular holes 7 at the upper end of the table top 1; the rotary jacking device comprises a rotary platform 9, a first hydraulic cylinder 10 and a storage plate 11, wherein the lower end of the rotary platform 9 is arranged at the bottom of the circular groove 8, the fixed end of the first hydraulic cylinder 10 is connected with the upper end face of the rotary platform 9, and the storage plate 11 is arranged on the moving end of the first hydraulic cylinder 10; the compressing device comprises a first air cylinder 12 and a first rubber compressing head 13, the fixed end of the first air cylinder 12 is connected with the top of the portal 4, and the upper end of the first rubber compressing head 13 is connected with the moving end of the first air cylinder 12 through a bearing; the horizontal clamping device comprises two groups of sliding plates 14, two groups of rotating shafts 15, a first gear motor 17, a gear 19, a second motor 20 and a plurality of groups of limiting columns 21, wherein the two groups of sliding plates 14 are respectively fixed in the two rectangular holes 7 through the plurality of groups of limiting columns 21, the sliding plates 14 can transversely move on the limiting columns 21, one end of each rotating shaft 15 is connected with the corresponding sliding plate 14 through a bearing, the other end of each rotating shaft 15 is provided with a second rubber pressing head 16, the two second rubber pressing heads 16 are positioned between the two sliding plates 14, the output end of the first gear motor 17 is connected with the left end face of the left sliding plate 14 and penetrates through the right end face of the left sliding plate 14 to be connected with the left rotating shaft 15, racks 18 are arranged at the lower part of the sliding plate 14, the racks 18 on the left sliding plate 14 are positioned at the front part, the racks 18 on the right sliding plate 14 are provided with limiting blocks 31 at the tail ends, the bottom ends of the second motor 20 are connected with the upper end face of the supporting plate 3, the gear 19 is sleeved on the output end of the second motor 20, and the front and rear ends of the gears 19 are respectively meshed with the racks 18 on the two sliding plates 14; the polishing device comprises a sliding block 22, a second air cylinder 23, a third air cylinder 24, a third motor 25, a flushing plate 26, a liquid inlet 27 and a polishing disc 28, wherein the lower part of the sliding block 22 is arranged in a track groove 5, the second air cylinder 23 is arranged on the upper end surface of the table top 1 and is positioned on the right side of the track groove 5, the output end of the second air cylinder 23 is connected with the right end surface of the sliding block 22, the fixed end of the third air cylinder 24 is arranged on the upper part of the rear end of the third air cylinder 24 through a base, the fixed end of the third motor 25 is connected with the movable end of the third air cylinder 24 through a mounting plate, and the polishing disc 28 is arranged on the output end of the third motor 25; the cooling dust collector includes water tank 29, valve 30 and bath board 26, water tank 29 installs the upper end at portal 4, water tank 29 upper end is provided with the water filling port, water tank 29 is provided with the outlet pipe in front end bottom, install valve 30 on the outlet pipe, be connected with bath board 26 on the rear end face of third motor 25, bath board 26 upper end is provided with inlet 27, bath board 26 rear end is provided with the water jet, water tank 29's delivery port passes through the hose and is connected with inlet 27, the output of third motor 25 passes bath board 26 and is connected with polishing dish 28, the front portion of circular slot 8 is provided with and opens water conservancy diversion hole 6, the water conservancy diversion hole 6 other end extends to mesa 1 lower extreme face front portion.

As shown in fig. 1 to 6, in the surface grinding machine for parts according to the present utility model, when in operation, a workpiece is first placed on the upper end of the placement plate 11, then the first cylinder 12 is controlled to extend, the first rubber pressing head 13 is pressed against the workpiece, then the third motor 25 is turned on, the third motor 25 transmits power to the grinding disc 28 to drive the grinding disc 28 to rotate, then the third cylinder 24 is controlled to extend, the grinding disc 28 contacts the workpiece surface to grind the workpiece, then the valve 30 is opened to enable the cooling liquid to be flushed toward the processing area, metal dust generated during processing is flushed into the circular groove 8 and flows out of the processing area through the diversion hole 6, when the workpiece surface is large, the processing area of the grinding disc 28 cannot cover the whole area of the workpiece surface, the second cylinder 23 is controlled to extend and retract, the slider 22 is laterally moved in the track groove 5, thereby the grinding disc 28 is horizontally moved on the workpiece surface, simultaneously controlling the first hydraulic cylinder 10 to stretch out and draw back, changing the height of the workpiece, enabling the polishing disc 28 to contact with the workpiece at different heights, increasing the polishing area of the polishing disc 28, changing the workpiece processing surface through the rotation of the rotating platform 9 when the workpiece is multi-surface to be processed, starting the second motor 20 when the upper end surface and the lower end surface of the workpiece are required to be polished, transmitting power to the gear 19 through the second motor 20 to drive the gear 19 to rotate, driving the sliding plate 14 to move in the rectangular hole 7 through the meshing of the rotating gear 19 with the rack 18 by the rotating gear 19, thereby enabling the second rubber compressing head 16 to clamp the workpiece, then controlling the first cylinder 12 and the first hydraulic cylinder 10 to shrink, then starting the first reducing motor 17, transmitting power to the second rubber compressing head 16 through the rotating shaft 15 by the first reducing motor 17, driving the second rubber compressing head 16 to rotate by the rotating shaft 15, and closing the first reducing motor 17 when the upper end surface or the lower end surface rotates to the front end, and then the first air cylinder 12 and the first hydraulic cylinder 10 are controlled to extend to fix the position of the workpiece, and the second rubber pressing head 16 is controlled by the second motor 20 to loosen the workpiece and then continuously polish the workpiece.

The mounting mode, the connecting mode or the setting mode of the part surface grinding machine are common mechanical modes, and the part surface grinding machine can be implemented as long as the beneficial effects can be achieved; the first cylinder 12, the first gear motor 17, the second motor 20, the gear 19, the grinding disc 28, the third motor 25, the third cylinder 24, the second cylinder 23, the valve 30, the rotary platform 9 and the first hydraulic cylinder 10 of the part surface grinding machine are purchased in the market, and a person skilled in the art only needs to install and operate according to the attached using instruction without the creative labor of the person skilled in the art.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims (7)

1. The utility model provides a part surface polisher, including mesa (1), two sets of landing leg boards (2), first cylinder (12), first rubber compresses tightly head (13), third cylinder (24), third motor (25) and polishing dish (28), two sets of landing leg boards (2) upper end are connected with mesa (1) lower terminal surface, first cylinder (12) stiff end is installed in mesa (1) middle part upside, the removal end of first cylinder (12) is directional mesa (1), the removal end that first rubber compresses tightly head (13) upper end and first cylinder (12) are connected through the bearing, the stiff end of third cylinder (24) is installed in mesa (1) front portion, the removal end of third cylinder (24) is directional mesa (1) rear portion, third motor (25) stiff end is connected with the removal end of third cylinder (24) through the connecting plate, polishing dish (28) are connected with the output of third motor (25); the device is characterized by further comprising a processing table, a rotary jacking device, a pressing device, a horizontal clamping device, a polishing device and a cooling and dust removing device, wherein the processing table supports a main body of equipment and provides installation and processing space for the equipment; the rotary jacking device is arranged on the processing table, and controls the height and rotation of the workpiece to change the polishing surface of the workpiece; the pressing device is arranged on the processing table and is matched with the rotary jacking device to press the workpiece; the horizontal clamping device is arranged on the processing table, fixes the horizontal direction of the workpiece, and controls the workpiece to rotate around a horizontal direction shaft to replace the grinding surface; the polishing device is arranged on the processing table, the workpiece can be polished by the polishing device, the polishing device can transversely move, the large polishing surface can be polished by the polishing device in cooperation with the rotary jacking device, the cooling and dust removing device is arranged on the processing table, the temperature of the device and the metal dust content in the air are reduced in the processing process by the cooling and dust removing device, and the metal dust is discharged out of the processing area of the device.

2. The part surface grinding machine according to claim 1, wherein the processing table comprises a table top (1), two groups of support leg plates (2), a support plate (3) and a portal frame (4), the upper end faces of the two groups of support leg plates (2) are connected with the lower end face of the table top (1), the left end and the right end of the support plate (3) are connected with the two groups of support leg plates (2), the lower end faces of the two groups of support legs of the portal frame (4) are connected with the upper end face of the table top (1), the front part of the upper end face of the table top (1) is provided with a track groove (5), the left side and the right side of the rear part are provided with symmetrical rectangular holes (7), and a circular groove (8) is formed between the two rectangular holes (7) at the upper end of the table top (1).

3. A machine as claimed in claim 1, characterized in that the rotary jacking means comprise a rotary platform (9), a first hydraulic cylinder (10) and a storage plate (11), the lower end of the rotary platform (9) is mounted at the bottom of the circular groove (8), the fixed end of the first hydraulic cylinder (10) is connected with the upper end surface of the rotary platform (9), and the storage plate (11) is mounted on the movable end of the first hydraulic cylinder (10).

4. A machine for grinding surfaces of parts according to claim 1, characterized in that the compacting means comprise a first cylinder (12) and a first rubber compacting head (13), the fixed end of the first cylinder (12) being connected to the top of the mast (4), the upper end of the first rubber compacting head (13) being connected to the moving end of the first cylinder (12) by means of a bearing.

5. A part surface grinding machine according to claim 1, characterized in that the horizontal clamping device comprises two groups of sliding plates (14), two groups of rotating shafts (15), a first gear motor (17), a gear (19), a second motor (20) and a plurality of groups of limiting columns (21), wherein the two groups of sliding plates (14) are respectively fixed in two rectangular holes (7) through the plurality of groups of limiting columns (21), the sliding plates (14) can transversely move on the limiting columns (21), one end of each rotating shaft (15) is connected with the sliding plate (14) through a bearing, the other end of each rotating shaft (15) is provided with a second rubber pressing head (16), the two second rubber pressing heads (16) are positioned between the two sliding plates (14), the output end of the first gear motor (17) is connected with the left end face of the left sliding plate (14) and penetrates through the right end face of the left sliding plate (14) to be connected with the left rotating shaft (15), racks (18) on the left sliding plate (14) are arranged at the lower part, racks (18) on the left sliding plate (14) are positioned at the front part, racks (18) on the right sliding plate (14) are positioned at the front part, racks (18) are positioned at the rear ends of the right sliding plate (14) and are positioned at the second end faces (20) and are connected with the second end faces (20), the front and rear ends of the gear (19) are respectively meshed with racks (18) on the two sliding plates (14).

6. A machine for grinding surfaces of parts as claimed in claim 1, characterized in that the grinding means comprises a slide block (22), a second cylinder (23), a third cylinder (24), a third motor (25), a flushing plate (26), a liquid inlet (27) and a grinding disc (28), the lower part of the slide block (22) is arranged in the track groove (5), the second cylinder (23) is arranged on the upper end surface of the table top (1) and is positioned on the right side of the track groove (5), the output end of the second cylinder (23) is connected with the right end surface of the slide block (22), the fixed end of the third cylinder (24) is arranged on the upper part of the rear end of the third cylinder (24) through a base, the fixed end of the third motor (25) is connected with the movable end of the third cylinder (24) through a mounting plate, and the grinding disc (28) is arranged on the output end of the third motor (25).

7. A part surface grinding machine as defined in claim 1, characterized in that the cooling and dust removing device comprises a water tank (29), a valve (30) and a flushing plate (26), the water tank (29) is arranged at the upper end of the gantry (4), a water inlet is arranged at the upper end of the water tank (29), a water outlet pipe is arranged at the bottom of the front end of the water tank (29), the valve (30) is arranged on the water outlet pipe, the flushing plate (26) is connected to the rear end face of the third motor (25), a liquid inlet (27) is arranged at the upper end of the flushing plate (26), a water spray opening is arranged at the rear end of the flushing plate (26), a water outlet of the water tank (29) is connected with the liquid inlet (27) through a hose, the output end of the third motor (25) penetrates through the flushing plate (26) to be connected with the grinding disc (28), a guide hole (6) is arranged at the front part of the circular groove (8), and the other end of the guide hole (6) extends to the front part of the lower end face of the table top (1).

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