阅读说明：本技术 一种带平面轴承的主轴结构 (Main shaft structure with plane bearing ) 是由 朱振强 王新 于 2021-09-28 设计创作，主要内容包括：本发明公开了一种带平面轴承的主轴结构,涉及数控机床技术领域,包括底座、主轴和第一平面轴承,所述底座的顶部外侧设置有工作台,所述主轴设置于工作台的内侧中端,所述第一平面轴承安置于底座和工作台之间,所述主轴的底部外侧连接有隔套,且隔套的顶部外侧安置有双列圆柱滚子轴承,所述双列圆柱滚子轴承的顶部外侧设置有压环,且压环的顶部外侧设置有锁紧螺母,所述锁紧螺母的外侧表面连接有第二平面轴承。本发明通过采用第一平面轴承和第二平面轴承对主轴和工作台的旋转进行支撑和引导,能有效提升两者的转动稳定性和转动精度,与此同时,通过采用平面轴承代替静压轴承,能避免工作台因为压力的不稳定导致工作台的精度浮动的情况发生。(The invention discloses a main shaft structure with a plane bearing, which relates to the technical field of numerical control machines and comprises a base, a main shaft and a first plane bearing, wherein a workbench is arranged on the outer side of the top of the base, the main shaft is arranged at the middle end of the inner side of the workbench, the first plane bearing is arranged between the base and the workbench, a spacer bush is connected to the outer side of the bottom of the main shaft, a double-row cylindrical roller bearing is arranged on the outer side of the top of the spacer bush, a pressing ring is arranged on the outer side of the top of the double-row cylindrical roller bearing, a locking nut is arranged on the outer side of the top of the pressing ring, and a second plane bearing is connected to the outer side surface of the locking nut. The invention can effectively improve the rotation stability and the rotation precision of the main shaft and the workbench by adopting the first plane bearing and the second plane bearing to support and guide the rotation of the main shaft and the workbench, and meanwhile, the invention can avoid the condition that the precision of the workbench floats due to the instability of pressure by adopting the plane bearing to replace a hydrostatic bearing.)

1. The main shaft structure with the plane bearing is characterized by comprising a base (1), a main shaft (3) and a first plane bearing (4), wherein a workbench (2) is arranged on the outer side of the top of the base (1), the main shaft (3) is arranged at the middle end of the inner side of the workbench (2), the first plane bearing (4) is arranged between the base (1) and the workbench (2), a spacer bush (5) is connected to the outer side of the bottom of the main shaft (3), a double-row cylindrical roller bearing (6) is arranged on the outer side of the top of the spacer bush (5), a pressing ring (7) is arranged on the outer side of the top of the double-row cylindrical roller bearing (6), a locking nut (8) is arranged on the outer side of the top of the pressing ring (7), a second plane bearing (9) is connected to the outer side surface of the locking nut (8), and a flange plate (10) is arranged on the outer side of the top of the main shaft (3), and the top outside of ring flange (10) is connected with first bolt (11), the bottom of ring flange (10) is provided with encoder (12), and the outside surface connection of ring flange (10) has adjusting pad (13), the top outside of main shaft (3) is connected with shaft coupling (14), and the top outside of shaft coupling (14) is provided with end cover (15), settle shaft coupling (14) and encoder (12) junction has oil blanket (16), settle the top outside of main shaft (3) has clamp plate (17), and the left part outside of clamp plate (17) is provided with second bolt (18), the top middle-end of workstation (2) is provided with apron subassembly (19), and the outside of apron subassembly (19) is connected with third bolt (20) all around.

2. The main shaft structure with the planar bearing is characterized in that the first planar bearing (4) comprises a lower bearing seat (401), bearing steel balls (402), an upper bearing seat (403), an oil inlet (404), an oil storage cavity (405), a lubricating pipe (406) and a valve (407), wherein the bearing steel balls (402) are arranged on the outer side of the top of the lower bearing seat (401), the upper bearing seat (403) is connected to the outer side of the top of the bearing steel balls (402), the oil inlet (404) is formed in the outer end of the upper bearing seat (403), the oil storage cavity (405) is formed in the tail end of the oil inlet (404), the lubricating pipe (406) is formed in the outer side of the bottom of the oil storage cavity (405), and the valve (407) is arranged at the middle end of the inner side of the lubricating pipe (406).

3. The main shaft structure with the plane bearing as claimed in claim 2, wherein the oil inlet (404) is communicated with the lubricating tube (406) through an oil storage chamber (405), and a vertical center line of the lubricating tube (406) is coincident with a vertical center line of the bearing steel ball (402).

4. The main shaft structure with the plane bearing as claimed in claim 2, wherein the angle between the lubrication tube (406) and the oil storage chamber (405) is 45 degrees, and the lubrication tube (406) is fixedly connected with the valve (407).

5. The main shaft structure with the plane bearing as claimed in claim 1, wherein the double-row cylindrical roller bearing (6) is connected with the main shaft (3) in a clamping manner, and the vertical center line of the double-row cylindrical roller bearing (6) and the vertical center line of the main shaft (3) are coincident with each other.

6. A spindle arrangement with a flat bearing according to claim 1, characterized in that the lock nut (8) is screwed to the spindle (3), and the lock nut (8) is snap-fitted to the second flat bearing (9), and the outer surface of the second flat bearing (9) is in contact with the inner surface of the table (2).

7. The spindle structure with the flat bearing according to claim 1, wherein the cover plate assembly (19) includes a plate body (1901), a sliding groove (1902), a sliding seat (1903), a threaded rod (1904), and an engaging plate (1905), the sliding groove (1902) is opened on an outer side of a top of the plate body (1901), the sliding seat (1903) is disposed on an inner side surface of the sliding groove (1902), the threaded rod (1904) is disposed on an inner side of the sliding seat (1903), and the engaging plate (1905) is disposed on a side of the threaded rod (1904) close to a vertical center line of the plate body (1901).

8. The spindle structure with the flat bearing according to claim 7, wherein the sliding slot (1902) is arc-shaped, and the sliding seat (1903) has an arc shape corresponding to the arc shape of the sliding slot (1902).

9. The spindle structure with the plane bearing as claimed in claim 7, wherein the abutting plate (1905) is arc-shaped, and the abutting plate (1905) is symmetrically distributed along a vertical center line of the coupling (14).

10. The spindle structure with the flat bearing according to claim 7, wherein the plate body (1901) is fixedly connected with the coupling (14), and the plate body (1901) is connected with the working table (2) through a third bolt (20).

Technical Field

The invention relates to the technical field of numerical control machine tools, in particular to a spindle structure with a plane bearing.

Background

The numerically controlled machine tool is an automatic machine tool with program control system, and the control system can logically process the program with control code or other symbol command, decode it, use coded digital representation, input it into the numerical control device through information carrier, and send out various control signals through the numerical control device after operation, and control the action of the machine tool, and automatically process the parts according to the shape and size required by the drawing.

The main shaft structure on the market usually uses a hydrostatic bearing to perform self-lubrication of the main shaft, and the hydrostatic bearing can cause the precision of the workbench to float due to the instability of pressure in the working process, so that the machining precision is subjected to error.

Disclosure of Invention

The present invention is directed to a spindle structure with a flat bearing to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme: a main shaft structure with a plane bearing comprises a base, a main shaft and a first plane bearing, wherein a workbench is arranged on the outer side of the top of the base, the main shaft is arranged at the middle end of the inner side of the workbench, the first plane bearing is arranged between the base and the workbench, a spacer sleeve is connected to the outer side of the bottom of the main shaft, a double-row cylindrical roller bearing is arranged on the outer side of the top of the spacer sleeve, a pressing ring is arranged on the outer side of the top of the double-row cylindrical roller bearing, a locking nut is arranged on the outer side of the top of the pressing ring, a second plane bearing is connected to the outer side surface of the locking nut, a flange is arranged on the outer side of the top of the main shaft, a first bolt is connected to the outer side of the top of the flange, an encoder is arranged at the bottom of the flange, an adjusting pad is connected to the outer side surface of the flange, a coupler is connected to the outer side of the top of the main shaft, and an end cover is arranged on the outer side of the top of the coupler, the oil seal is arranged at the joint of the coupler and the encoder, the pressing plate is arranged on the outer side of the top of the main shaft, the second bolt is arranged on the outer side of the left portion of the pressing plate, the cover plate assembly is arranged at the middle end of the top of the workbench, and the third bolt is connected to the periphery of the outer side of the cover plate assembly.

Preferably, the first plane bearing comprises a lower bearing seat, bearing steel balls, an upper bearing seat, an oil inlet, an oil storage cavity, a lubricating pipe and a valve, the bearing steel balls are arranged on the outer side of the top of the lower bearing seat, the upper bearing seat is connected to the outer side of the top of the bearing steel balls, the oil inlet is formed in the outer end of the upper bearing seat, the oil storage cavity is formed in the tail end of the oil inlet, the lubricating pipe is formed in the outer side of the bottom of the oil storage cavity, and the valve is arranged at the middle end of the inner side of the lubricating pipe.

Preferably, the oil inlet is communicated with the lubricating pipe through an oil storage cavity, and the vertical center line of the lubricating pipe is overlapped with the vertical center line of the bearing steel ball.

Preferably, the lubricating pipe and the oil storage cavity form an included angle of 45 degrees, and the lubricating pipe is fixedly connected with the valve.

Preferably, the double-row cylindrical roller bearing is connected with the main shaft in a clamping manner, and the vertical center line of the double-row cylindrical roller bearing is overlapped with the vertical center line of the main shaft.

Preferably, the locking nut is in threaded connection with the main shaft, the locking nut is in clamping connection with the second planar bearing, and the outer surface of the second planar bearing is attached to the inner surface of the workbench.

Preferably, the apron subassembly includes plate body, spout, sliding seat, threaded rod, and the binding plate, the spout has been seted up in the top outside of plate body, and the inboard surface of spout is provided with the sliding seat, the inboard of sliding seat is provided with the threaded rod, the threaded rod is close to plate body vertical center line one side and is provided with the binding plate.

Preferably, the sliding groove is arc-shaped, and the radian of the sliding seat is consistent with that of the sliding groove.

Preferably, the attaching plate is arc-shaped and symmetrically distributed along the vertical center line of the coupler.

Preferably, the plate body is fixedly connected with the coupler, and the plate body is connected with the workbench through a third bolt.

The invention provides a main shaft structure with a plane bearing, which has the following beneficial effects: adopt the flat bearing to replace hydrostatic bearing, can avoid the workstation to lead to the condition that the precision of workstation floated to take place because of the unstability of pressure, bolster bearing housing is at rotatory in-process, and the lubricating oil in the oil storage intracavity can break through the inboard valve of lubricated pipe and trickle to the bearing steel ball because of the effect of centrifugal force, and this makes first flat bearing can carry out the self-lubricating like hydrostatic bearing at rotatory in-process, and this makes the machining precision of lathe can further rise.

1. The invention can effectively improve the rotation stability and the rotation precision of the main shaft and the workbench by adopting the first plane bearing and the second plane bearing to support and guide the rotation of the main shaft and the workbench, and meanwhile, the invention can avoid the condition that the precision of the workbench floats due to the instability of pressure by adopting the plane bearing to replace a hydrostatic bearing.

2. According to the invention, lubricating oil is injected into the inner side of the oil inlet, so that the lubricating oil enters the inner side of the oil storage cavity to be stored, and in the rotating process of the upper bearing seat, the lubricating oil in the oil storage cavity breaks through a valve on the inner side of the lubricating pipe under the action of centrifugal force and flows to the steel balls of the bearing, so that the first plane bearing can perform self-lubricating in the rotating process like a hydrostatic bearing, and the processing precision of the equipment can be further improved.

3. The inner circular surface of the double-row cylindrical roller bearing can be clamped on the surface of the main shaft through the spacer bush and the pressing ring, after the main shaft and the workbench are assembled, the outer circular surface of the double-row cylindrical roller bearing can be clamped with the inner surface of the workbench, so that the friction force between the main shaft and the workbench can be reduced in the rotating process of the main shaft, meanwhile, the double-row cylindrical roller bearing can limit the main shaft, the radial circular run-out of the main shaft can be reduced, and the main shaft can rotate more stably.

4. According to the invention, after the cutter is inserted into the top end of the coupler, the coupler and the cutter can be fixed, the threaded rod can drive the attaching plate to move by screwing the threaded rod, so that the attaching plate can be attached to the outer surface of the cutter, the probability of inclination or shaking caused by external force influence in the cutting process of the cutter can be reduced by the protection of the attaching plate, the cutter can be driven to rotate when the spindle drives the coupler to rotate, so that the coupler can drive the cutter to perform cutting operation, when the cutter rotates, the attaching plate on the outer side can slide in the sliding groove through the sliding seat to synchronously rotate, and the interference of the attaching plate on the rotation of the cutter can be avoided.

Drawings

FIG. 1 is a schematic overall structure diagram of a spindle structure with a flat bearing according to the present invention;

FIG. 2 is an enlarged schematic view of the spindle structure with a flat bearing shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view of a first flat bearing of the spindle structure with a flat bearing according to the present invention;

FIG. 4 is a schematic diagram of an internal structure of a first planar bearing of the spindle structure with a planar bearing according to the present invention;

FIG. 5 is a schematic top view of a cover plate assembly of a spindle structure with a flat bearing according to the present invention.

In the figure: 1. a base; 2. a work table; 3. a main shaft; 4. a first planar bearing; 401. a lower bearing seat; 402. bearing steel balls; 403. an upper bearing seat; 404. an oil inlet; 405. an oil storage chamber; 406. a lubrication tube; 407. a valve; 5. a spacer sleeve; 6. a double-row cylindrical roller bearing; 7. pressing a ring; 8. locking the nut; 9. a second planar bearing; 10. a flange plate; 11. a first bolt; 12. an encoder; 13. an adjustment pad; 14. a coupling; 15. an end cap; 16. oil sealing; 17. pressing a plate; 18. a second bolt; 19. a cover plate assembly; 1901. a plate body; 1902. a chute; 1903. a sliding seat; 1904. a threaded rod; 1905. attaching a plate; 20. and a third bolt.

Detailed Description

Referring to fig. 1-5, the present invention provides a technical solution: a main shaft structure with a plane bearing comprises a base 1, a main shaft 3 and a first plane bearing 4, wherein a workbench 2 is arranged on the outer side of the top of the base 1, the main shaft 3 is arranged at the middle end of the inner side of the workbench 2, the first plane bearing 4 is arranged between the base 1 and the workbench 2, a spacer 5 is connected on the outer side of the bottom of the main shaft 3, a double-row cylindrical roller bearing 6 is arranged on the outer side of the top of the spacer 5, a press ring 7 is arranged on the outer side of the top of the double-row cylindrical roller bearing 6, a locking nut 8 is arranged on the outer side of the top of the press ring 7, a second plane bearing 9 is connected on the outer side surface of the locking nut 8, a flange 10 is arranged on the outer side of the top of the main shaft 3, a first bolt 11 is connected on the outer side of the top of the flange 10, an encoder 12 is arranged on the bottom of the flange 10, an adjusting pad 13 is connected on the outer side surface of the outer side of the flange 10, and a coupler 14 is connected on the outer side of the top of the main shaft 3, an end cover 15 is arranged on the outer side of the top of the coupler 14, an oil seal 16 is arranged at the joint of the coupler 14 and the encoder 12, a pressing plate 17 is arranged on the outer side of the top of the main shaft 3, a second bolt 18 is arranged on the outer side of the left part of the pressing plate 17, a cover plate assembly 19 is arranged at the middle end of the top of the workbench 2, and third bolts 20 are connected to the periphery of the outer side of the cover plate assembly 19;

concrete operation is as follows, the tail end of main shaft 3 can link up with the motor, carry out work through the motor, can make main shaft 3 rotate, 3 rotatory in-processes of main shaft, accessible shaft coupling 14 drives apron subassembly 19 and rotates, links up through third bolt 20 because of apron subassembly 19 and workstation 2, and this makes main shaft 3 can drive workstation 2 and rotate at base 1's top at rotatory in-process to enable equipment and carry out normal operation.

Referring to fig. 1, 3 and 4, the first planar bearing 4 includes a lower bearing seat 401, a bearing steel ball 402, an upper bearing seat 403, an oil inlet 404, an oil storage cavity 405, a lubricating tube 406 and a valve 407, the bearing steel ball 402 is disposed on the outer side of the top of the lower bearing seat 401, the upper bearing seat 403 is connected to the outer side of the top of the bearing steel ball 402, the oil inlet 404 is disposed on the outer end of the upper bearing seat 403, the oil storage cavity 405 is disposed at the end of the oil inlet 404, the lubricating tube 406 is disposed on the outer side of the bottom of the oil storage cavity 405, the valve 407 is disposed on the middle end of the inner side of the lubricating tube 406, the oil inlet 404 is communicated with the lubricating tube 406 through the oil storage cavity 405, the vertical center line of the lubricating tube 406 and the vertical center line of the bearing steel ball 402 coincide with each other, an included angle of 45 ° is formed between the lubricating tube 406 and the oil storage cavity 405, and the lubricating tube 406 is fixedly connected with the valve 407;

the operation is as follows, the lower bearing seat 401 of the first planar bearing 4 is attached to the base 1, the upper bearing seat 403 of the first planar bearing 4 is attached to the workbench 2, the workbench 2 rotates to drive the upper bearing seat 403 to roll on the bearing steel balls 402, so that the first planar bearing 4 can support and guide the rotation of the workbench 2, lubricating oil can enter the inner side of the oil storage cavity 405 to be stored by injecting the lubricating oil into the inner side of the oil inlet 404, during the rotation of the upper bearing seat 403, the lubricating oil in the oil storage cavity 405 breaks through the valve 407 on the inner side of the lubricating pipe 406 due to the effect of centrifugal force and flows to the bearing steel balls 402, so that the first planar bearing 4 can perform self-lubrication in the rotation process like a static pressure bearing, and the processing precision of the device can further increase.

Referring to fig. 1 and 2, the double-row cylindrical roller bearing 6 is connected with the main shaft 3 in a clamping manner, the vertical center line of the double-row cylindrical roller bearing 6 is overlapped with the vertical center line of the main shaft 3, the lock nut 8 is in threaded connection with the main shaft 3, the lock nut 8 is connected with the second planar bearing 9 in a clamping manner, and the outer surface of the second planar bearing 9 is attached to the inner surface of the workbench 2;

the operation is as follows, the inner circle surface of the double-row cylindrical roller bearing 6 can be clamped on the surface of the main shaft 3 through the spacer 5 and the press ring 7, after the main shaft 3 is assembled with the workbench 2, the outer circle surface of the double-row cylindrical roller bearing 6 can be clamped with the inner surface of the workbench 2, so that the friction force between the main shaft 3 and the workbench 2 can be reduced in the process of rotating the main shaft 3 of the double-row cylindrical roller bearing 6, meanwhile, the double-row cylindrical roller bearing 6 can limit the main shaft 3, so that the radial circular runout of the main shaft 3 can be reduced, the rotation of the main shaft 3 can be more stable, after the locking nut 8 is screwed into the top outer side of the main shaft 3, the second planar bearing 9 can be nested on the outer surface of the locking nut 8, after the main shaft 3 is arranged on the inner side of the workbench 2, the lower surface of the second planar bearing 9 can be attached to the inner wall of the workbench 2, at this time, the top of the second planar bearing 9 is covered with the press plate 17, the second bolt 18 is screwed into the top end of the pressure plate 17, so that the pressure plate 17 and the spindle 3 can be fixed, when the spindle 3 rotates, the pressure plate 17 can drive the second plane bearing 9 to rotate, the second plane bearing 9 can support and guide the rotation of the spindle 3, in addition, the second plane bearing 9 is also provided with a lubricating structure as the first plane bearing 4, so that the second plane bearing 9 can carry out self-lubrication in the rotating process, the first plane bearing 4 and the second plane bearing 9 are adopted to support and guide the rotation of the spindle 3 and the workbench 2, the rotating stability and the rotating precision of the spindle and the workbench can be effectively improved, meanwhile, the plane bearing is adopted to replace a static pressure bearing, the condition that the precision of the workbench 2 floats due to the unstable pressure can be avoided, and the flange plate 10 can be connected with the encoder 12, after the flange plate 10 connected with the encoder 12 is arranged on the inner side of the adjusting pad 13, the adjusting pad 13 can limit the flange plate 10, at the moment, the first bolt 11 is screwed into the top end of the flange plate 10, the flange plate 10 can be connected with the spindle 3, so that the encoder 12 can be fixed on the inner side of the spindle 3, the rotation of the spindle 3 can be connected with the feeding motion of a processing machine tool, one end of the coupler 14 can be connected with the encoder 12 through the oil seal 16, the other end of the coupler can be fixed on the inner side of the plate 1901, the plate 1901 is connected with the workbench 2 through the third bolt 20, and the workbench 2 can be driven to rotate together by the spindle 3 in the rotating process.

Referring to fig. 1 and 5, the cover plate assembly 19 includes a plate body 1901, a sliding groove 1902, a sliding seat 1903, a threaded rod 1904, and an engaging plate 1905, where the sliding groove 1902 is formed on an outer side of a top of the plate body 1901, a sliding seat 1903 is disposed on an inner side surface of the sliding groove 1902, the threaded rod 1904 is disposed on an inner side of the sliding seat 1903, the engaging plate 1905 is disposed on one side of the threaded rod 1904 close to a vertical center line of the plate body 1901, the sliding groove 1902 is arc-shaped, the sliding seat 1903 has a same radian as the sliding groove 1902, the engaging plate 1905 is arc-shaped, the engaging plate 1905 is symmetrically distributed along the vertical center line of the coupler 14, the plate body 1901 is fixedly connected to the coupler 14, and the plate body 1901 is connected to the workbench 2 through a third bolt 20;

the specific operation is as follows, through opening end cover 15, can make the shaft coupling 14 of plate 1901 inboard expose, insert the top of shaft coupling 14 with the cutter after, can make shaft coupling 14 and cutter fix, through twisting threaded rod 1904, enable threaded rod 1904 to drive attaching plate 1905 and remove, this makes attaching plate 1905 can laminate with the surface of cutter mutually, through attaching plate 1905's protection, can reduce the cutter in the cutting process, because of the probability that external force influence takes place to incline or tremble, when main shaft 3 drives shaft coupling 14 and rotates, can drive the cutter and rotate, thereby can make shaft coupling 14 drive the cutter carry out the cutting operation, when the cutter rotates, attaching plate 1905 in the outside can slide in the spout through sliding seat 1903 and carry out synchronous revolution, this can avoid attaching plate 1905 to cause the interference to the rotation of cutter 1902.

To sum up, when the spindle structure with the plane bearing is used, firstly, the inner circular surface of the double-row cylindrical roller bearing 6 is clamped with the spacer 5 and the pressing ring 7, so that the inner circular surface of the double-row cylindrical roller bearing 6 can be fixed on the surface of the spindle 3, after the locking nut 8 is screwed into the outer side of the top of the spindle 3, the second plane bearing 9 can be nested on the outer surface of the locking nut 8, after the spindle 3 is arranged on the inner side of the workbench 2, the lower surface of the second plane bearing 9 can be attached to the inner wall of the workbench 2, at the moment, the top of the second plane bearing 9 is covered with the pressing plate 17, and the second bolt 18 is screwed into the top end of the pressing plate 17, so that the pressing plate 17 and the spindle 3 can be fixed;

then, the flange 10 is connected with the encoder 12, after the flange 10 connected with the encoder 12 is arranged on the inner side of the adjusting pad 13, the adjusting pad 13 can limit the flange 10, at the moment, the first bolt 11 is screwed into the top end of the flange 10, so that the flange 10 can be connected with the spindle 3, the encoder 12 can be fixed on the inner side of the spindle 3, one end of the coupler 14 can be connected with the encoder 12 through the oil seal 16, and the other end of the coupler can be fixed on the inner side of the plate 1901;

then, after the main shaft 3 and the workbench 2 are assembled, the outer circular surface of the double-row cylindrical roller bearing 6 can be clamped with the inner surface of the workbench 2, so that the friction force between the main shaft 3 and the workbench 2 can be reduced in the rotating process of the main shaft 3 by the double-row cylindrical roller bearing 6, meanwhile, the main shaft 3 can be limited by the double-row cylindrical roller bearing 6, the radial circular runout of the main shaft 3 can be reduced, and the main shaft 3 can rotate more stably, and the plate 1901 is connected with the workbench 2 through the third bolt 20, so that the main shaft 3 can drive the workbench 2 to rotate together in the rotating process;

then, when the main shaft 3 rotates, the pressure plate 17 can drive the second plane bearing 9 to rotate, this allows the second plane bearing 9 to support and guide the rotation of the main shaft 3, the lower bearing seat 401 of the first plane bearing 4 is attached to the base 1, and the upper bearing seat 403 of the first plane bearing 4 is attached to the worktable 2, and is rotated by the worktable 2, the upper bearing seat 403 can be driven to roll on the bearing steel balls 402, which enables the first plane bearing 4 to support and guide the rotation of the worktable 2, the first plane bearing 4 and the second plane bearing 9 are adopted to support and guide the rotation of the main shaft 3 and the workbench 2, so that the rotation stability and the rotation precision of the main shaft and the workbench can be effectively improved, and simultaneously, by adopting the plane bearing to replace a hydrostatic bearing, the condition that the precision of the workbench 2 floats due to the instability of the pressure of the workbench 2 can be avoided;

lubricating oil is injected into the inner side of the oil inlet 404, so that the lubricating oil can enter the inner side of the oil storage cavity 405 to be stored, in the rotating process of the upper bearing seat 403, the lubricating oil in the oil storage cavity 405 breaks through a valve 407 on the inner side of the lubricating pipe 406 under the action of centrifugal force and flows to the bearing steel balls 402, so that the first planar bearing 4 can perform self-lubricating in the rotating process like a hydrostatic bearing, the processing precision of the equipment can be further improved, in addition, the second planar bearing 9 is the same as the first planar bearing 4, a lubricating structure is also arranged in the second planar bearing 9, and the second planar bearing 9 can perform self-lubricating in the rotating process;

finally, by opening the end cover 15, the coupling 14 inside the plate 1901 can be exposed, after a cutter is inserted into the top end of the coupling 14, the coupling 14 can be fixed with the cutter, by screwing the threaded rod 1904, the threaded rod 1904 can drive the attaching plate 1905 to move, so that the attaching plate 1905 can be attached to the outer surface of the cutter, through the protection of the attaching plate 1905, the probability that the cutter tilts or shakes due to the influence of external force can be reduced in the cutting process, when the spindle 3 drives the coupling 14 to rotate, the cutter can be driven to rotate, so that the coupling 14 can drive the cutter to perform cutting operation, when the cutter rotates, the attaching plate 1905 outside can slide in the sliding groove 1902 through the sliding seat 1903 to synchronously rotate, and interference caused by the rotation of the attaching plate 1905 to the cutter can be avoided.