CN220480112U

CN220480112U - Machine tool for forging and forming stainless steel workpiece

Info

Publication number: CN220480112U
Application number: CN202322144311.2U
Authority: CN
Inventors: 胡志常
Original assignee: Zhejiang Huayi Steel Co ltd
Current assignee: Zhejiang Huayi Steel Co ltd
Priority date: 2023-08-10
Filing date: 2023-08-10
Publication date: 2024-02-13
Anticipated expiration: 2033-08-10

Abstract

The utility model discloses a machine tool for forging and forming a stainless steel workpiece, which comprises a base, wherein four corners of the upper end of the base are fixedly provided with supporting columns, the upper ends of the supporting columns are fixedly provided with top plates, the center of the lower end of the base is fixedly provided with a first motor, the output end of the first motor passes through the base and is fixedly connected with the lower end face of a rotating plate, the upper end of the rotating plate is provided with a bottom plate, two sides of the upper end of the bottom plate are fixedly provided with upright posts, the upper ends of the upright posts are fixedly provided with annular plates, two sides of the upper end face of the annular plates are fixedly provided with second motors, the output ends of the second motors pass through the annular plates and are fixedly connected with one end of a threaded column, the other end of the threaded column passes through a movable plate and is in rotary connection with the bottom plate, the upper ends of the top plates are fixedly provided with cylinder devices, and the telescopic ends of the cylinder devices pass through the top plates and are fixedly connected with forging and pressing structures; the utility model can realize uniform forging and pressing of the workpiece and can realize automatic front and back replacement of the workpiece.

Description

Machine tool for forging and forming stainless steel workpiece

Technical Field

The utility model relates to the technical field of forging machine tools, in particular to a machine tool for forging and forming a stainless steel workpiece.

Background

The forging is a processing method for applying pressure to a metal blank by using forging machinery to enable the metal blank to generate plastic deformation so as to obtain a forging piece with certain mechanical properties, a certain shape and a certain size, the defects of cast loosening and the like generated in the smelting process of metal can be eliminated by forging, the microstructure is optimized, and the multidirectional realization of uniform forging and pressing on a workpiece is very important in the forging processing process.

A year-round high-performance forging machine tool with the publication number of CN211413519U in the prior art drives a rotating rod to rotate through the meshing effect between a second gear and a first gear, so that a supporting plate is driven to rotate, a cylinder is started to drive a sliding block to move up and down along a guide post, a punch is driven to forge a machined workpiece in the moving process through the sliding block, and the supporting plate drives the machined workpiece to forge the machined workpiece in the rotating process, so that the punch can forge the machined workpiece in multiple directions; however, when the workpiece is forged, the front and back sides of the workpiece are required to be forged, and after one side of the workpiece is required to be forged, the workpiece is manually turned over, so that the machine tool for forging and forming the stainless steel workpiece is very inconvenient.

Disclosure of Invention

The utility model aims to provide a machine tool for forging and forming a stainless steel workpiece, which can realize uniform forging and pressing of the workpiece and can realize automatic front and back replacement of the workpiece.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a lathe is used in forging forming of stainless steel work piece, includes the base, the fixed a plurality of stabilizer blades that are equipped with in base lower extreme, base upper end four corners is all fixed and is equipped with the support column, the support column upper end is fixed and is equipped with the roof, base lower extreme center is fixed and is equipped with motor one, motor one's output passes base and rotating plate lower terminal surface fixed connection, the rotating plate upper end is equipped with the bottom plate, bottom plate upper end both sides are fixed and are equipped with the stand, the fixed annular slab that is equipped with of stand upper end, annular slab up end both sides are all fixed and are equipped with motor two, motor two's output passes annular slab and threaded column one end fixed connection, threaded column one other end pass the movable plate with the bottom plate rotates to be connected, the movable plate with threaded column one threaded connection, the one end of threaded column one is kept away from to the movable plate up end is fixed and is equipped with the curb plate, curb plate one side is fixed and is equipped with motor three, motor three's output all passes the curb plate respectively with connecting piece fixed connection, be equipped with the mould between the connecting piece, roof fixed device passes with the fixed cylinder of device with the roof one end.

By adopting the technical scheme, the utility model has the following advantages:

the motor I and the rotating plate are arranged to drive the die to rotate, so that the forging structure can realize multidirectional uniform forging and pressing on the metal blanks in the die, and the quality of finished products is effectively improved; according to the utility model, the motor II and the motor III are arranged, so that the motor II can drive the threaded column to rotate, thereby driving the movable plate to move up and down, and then the motor III is started to drive the die to turn over automatically, so that manual turn-over is not needed, and the use is very convenient.

Further, the mould comprises left template and right template, the connecting piece includes fixed column and screw thread post two, left side template with right side template is close to motor three's one end is all fixed be equipped with the fixed column, the fixed column is kept away from left side template with right side template's one end all is equipped with the screw thread groove, the screw thread inslot is equipped with through threaded connection is fixed screw thread post two, screw thread post two with motor three's output fixed connection.

the fixing column and the threaded column II are arranged, so that the die can be spirally arranged on the threaded column II to be connected with the motor III, and the die is convenient to replace and maintain.

Further, the forging structure comprises a forging plate, a connecting column and a thread column III, wherein the connecting column is fixedly arranged at the upper end of the forging plate, a thread groove is formed in one end, far away from the forging plate, of the connecting column, the thread column III is arranged in the thread groove through threaded connection, and one end, far away from the forging plate, of the thread column III is fixedly connected with the telescopic end of the air cylinder device.

the arrangement of the connecting column and the threaded column enables replacement and maintenance of the forging plate to be more convenient.

Further, the bottom plate comprises a left auxiliary plate and a right auxiliary plate, a plurality of clamping blocks I are fixedly arranged on one surface, contacted with the left auxiliary plate, of the left auxiliary plate, clamping grooves I are formed in positions, corresponding to the clamping blocks I, of the clamping blocks I, sealing plates are fixedly arranged at the upper ends of the left auxiliary plate and the right auxiliary plate, the sealing plates are propped against each other, and the upper end faces of the sealing plates are propped against the lower end faces of the templates.

according to the utility model, the left auxiliary plate and the right auxiliary plate are arranged, so that when a forged workpiece is required to be taken out, the separation of the die can be realized through the separation of the left auxiliary plate and the right auxiliary plate, and the subsequent workpiece is convenient to take out.

Further, the annular plate comprises a left annular plate and a right annular plate, clamping blocks II are fixedly arranged at ports at two ends of the right annular plate, clamping grooves II are formed in positions, corresponding to the right annular plate, of the left annular plate, and the clamping blocks II are clamped in the clamping grooves II.

the left annular plate and the right annular plate are arranged, so that when the left auxiliary plate and the right auxiliary plate are separated, the annular plates can be separated to two sides, and the subsequent workpiece can be taken out conveniently.

Further, the left auxiliary plate with the terminal surface is all fixed down and is equipped with the regulating block, the fixed plate that is equipped with is all fixed to rotating plate upper end both sides, be equipped with screw thread post four and screw thread post five between fixed plate and the fixed plate, screw thread post four with screw thread post five one end respectively with corresponding the fixed plate rotates to be connected, screw thread post four with fixed connection between the five other ends of screw thread post, screw thread post four with screw thread post five runs through respectively corresponding regulating block and regulating block threaded connection, one side the fixed plate is kept away from screw thread post five one side is fixed and is equipped with motor four, motor four's output passes fixed plate and screw thread post five one end fixed connection, screw thread post four with screw thread post five's screw thread sets up relatively.

according to the utility model, the motor IV, the threaded column IV and the threaded column V are arranged, so that when the motor IV is started, the two adjusting blocks can be driven to move close to or away from each other, thereby realizing the separation and combination of the left auxiliary plate and the right auxiliary plate, and facilitating the subsequent taking out of workpieces.

Further, the regulating block lower terminal surface both sides all are equipped with the slot, all be equipped with the roller in the slot, the roller both ends are all fixed and are equipped with the principal post, the principal post respectively with correspond the slot both ends rotate and are connected, both ends all run through around the regulating block and are equipped with spacing post, the rotating plate up end is located spacing post both ends are all fixed and are equipped with the limiting plate, the limiting post respectively with corresponding limiting plate fixed connection.

according to the utility model, the roller is arranged, so that the friction force between the adjusting block and the rotating plate is effectively reduced, the adjusting block can move better when moving, the adjusting block is not easy to wear and damage, and the limiting plate and the limiting post are arranged, so that the adjusting block can only move left and right and cannot deviate from the direction.

Further, the lower end face of the rotating plate is provided with a plurality of embedded grooves in a surrounding mode, a plurality of rollers are arranged in the embedded grooves, rotating columns are fixedly arranged at two ends of each roller, and the rotating columns are respectively connected with the two ends of the corresponding embedded grooves in a rotating mode.

the roller is arranged, so that the roller plays a role in supporting the rotating plate, the stability of the roller is improved, and the rotating plate can rotate on the base better.

Drawings

The utility model will be further described with reference to the drawings and examples.

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

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present utility model;

FIG. 3 is a schematic cross-sectional view of the present utility model looking down on the annular plate;

FIG. 4 is an enlarged schematic view of the structure of FIG. 1 at C according to the present utility model;

fig. 5 is an enlarged schematic view of the structure of fig. 1 at B according to the present utility model.

Reference numerals: 1. a base; 101. a support leg; 2. a right sub-plate; 201. a clamping block I; 3. a left sub-plate; 301. a clamping groove I; 4. a left ring plate; 401. a clamping groove II; 5. a right ring plate; 501. a clamping block II; 6. a second motor; 601. a first threaded column; 7. a rotating plate; 701. a fixing plate; 702. an embedded groove; 8. a roller; 801. a rotating column; 9. a moving plate; 901. a side plate; 10. a support column; 11. a column; 12. a top plate; 13. a threaded column IV; 14. a screw column V; 15. a first motor; 16. an adjusting block; 17. a fourth motor; 18. forging a pressing plate; 19. a connecting column; 20. a threaded column III; 21. a cylinder device; 22. a sealing plate; 23. a second threaded column; 24. a left template; 25. a right template; 26. fixing the column; 27. a third motor; 28. rolling grooves; 29. a roller; 30. a limiting plate; 31. and a limit column.

Detailed Description

As shown in fig. 1 to 3, in the specific embodiment, a machine tool for forging and forming a stainless steel workpiece comprises a base 1, a plurality of supporting legs 101 are fixedly arranged at the lower end of the base 1, supporting columns 10 are fixedly arranged at four corners of the upper end of the base 1, a top plate 12 is fixedly arranged at the upper end of the supporting columns 10, a motor one 15 is fixedly arranged at the center of the lower end of the base 1, an output end of the motor one 15 penetrates through the base 1 and is fixedly connected with the lower end face of a rotating plate 7, a bottom plate is arranged at the upper end of the rotating plate 7, upright posts 11 are fixedly arranged at two sides of the upper end of the bottom plate, an annular plate is fixedly arranged at the upper end of the upright posts 11, two sides of the upper end face of the annular plate are fixedly provided with a motor two 6, the output end of the motor two 6 penetrates through the annular plate and is fixedly connected with one end of a threaded column one 601, the other end of the threaded column one 601 penetrates through a movable plate 9 and is in rotary connection with the bottom plate, one end of the threaded column one 601 of the movable plate 9 is fixedly provided with a side plate 901, one side plate 27 is fixedly arranged at one side of the side plate 901, the output ends of the motor three 27 penetrates through the side plates 901 and is fixedly connected with connecting pieces respectively, a die is fixedly arranged between the connecting pieces, an upper end 12 upper end 21 is fixedly connected with a cylinder forging and pressing device 21, and the upper end 21 penetrates through the telescopic structure of the cylinder 12 and is fixedly connected with the top plate 12; the die consists of a left die plate 24 and a right die plate 25, the connecting piece comprises a fixed column 26 and a threaded column II 23, the fixed column 26 is fixedly arranged at one ends of the left die plate 24 and the right die plate 25, which are close to a motor III 27, the threaded grooves are respectively arranged at one ends of the fixed column 26, which are far away from the left die plate 24 and the right die plate 25, the threaded column II 23 is fixedly arranged in the threaded grooves through threaded connection, and the threaded column II 23 is fixedly connected with the output end of the motor III 27; the forging structure comprises a forging plate 18, a connecting column 19 and a threaded column III 20, wherein the connecting column 19 is fixedly arranged at the upper end of the forging plate 18, a threaded groove is formed in one end, far away from the forging plate 18, of the connecting column 19, the threaded column III 20 is arranged in the threaded groove through threaded connection, and one end, far away from the forging plate 18, of the threaded column III 20 is fixedly connected with the telescopic end of the air cylinder device 21.

Through the arrangement, the motor I15 and the rotating plate 7 play a role in driving the die to rotate, so that the forging structure can realize multidirectional uniform forging and pressing on the metal blanks in the die, and the quality of finished products is effectively improved; according to the utility model, the second motor 6 and the third motor 27 are arranged, so that the second motor 6 can drive the first threaded column 601 to rotate, thereby driving the movable plate 9 to move up and down, and then the mold can be driven to automatically turn over by starting the third motor 27, so that manual turn-over is not required, and the use is very convenient; the fixed column 26 and the threaded column II 23 are arranged, so that the die can be spirally arranged on the threaded column II 23 to be connected with the motor III 27, and the die is convenient to replace and maintain; the arrangement of the connecting post 19 and the threaded post three 20 of the utility model makes the replacement and maintenance of the forging plate 18 more convenient.

As shown in fig. 1, 3 and 4, the bottom plate comprises a left auxiliary plate 3 and a right auxiliary plate 2, one surface of the right auxiliary plate 2, which is contacted with the left auxiliary plate 3, is fixedly provided with a plurality of clamping blocks I201, the position of the left auxiliary plate 3 corresponding to the clamping blocks I201 is provided with clamping grooves I301, the clamping blocks I201 are clamped in the corresponding clamping grooves I301, the upper ends of the left auxiliary plate 3 and the right auxiliary plate 2 are fixedly provided with sealing plates 22, the sealing plates 22 are propped against the sealing plates 22, and the upper end surfaces of the sealing plates 22 are propped against the lower end surfaces of the templates; the annular plate comprises a left annular plate 4 and a right annular plate 5, two end ports of the right annular plate 5 are fixedly provided with clamping blocks II 501, the positions of the left annular plate 4 corresponding to the right annular plate 5 are provided with clamping grooves II 401, and the clamping blocks II 501 are clamped in the clamping grooves II 401; the lower end surfaces of the left auxiliary plate 3 and the right auxiliary plate 2 are fixedly provided with adjusting blocks 16, two sides of the upper end of the rotating plate 7 are fixedly provided with fixing plates 701, a threaded column IV 13 and a threaded column V14 are arranged between the fixing plates 701 and the fixing plates 701, one ends of the threaded column IV 13 and the threaded column V14 are respectively connected with the corresponding fixing plates 701 in a rotating mode, the other ends of the threaded column IV 13 and the threaded column V14 are fixedly connected, the threaded column IV 13 and the threaded column V14 respectively penetrate through the corresponding adjusting blocks 16 and are in threaded connection with the adjusting blocks 16, one side, far away from the threaded column V14, of the fixing plates 701 is fixedly provided with a motor IV 17, the output end of the motor IV 17 penetrates through the fixing plates 701 and is fixedly connected with one end of the threaded column V14, and threads of the threaded column IV 13 and the threaded column V14 are oppositely arranged; the regulating block 16 lower terminal surface both sides all are equipped with the slot 28, all are equipped with roller 29 in the slot 28, and roller 29 both ends all are fixed and are equipped with the principal post, and the principal post rotates with corresponding slot 28 both ends respectively to be connected, and regulating block 16 front and back both ends all run through and are equipped with spacing post 31, and the locating plate 30 that all fixes in spacing post 31 both ends of the up end of revolving plate 7, spacing post 31 respectively with corresponding spacing plate 30 fixed connection.

Through the arrangement, the left auxiliary plate 3 and the right auxiliary plate 2 are arranged, so that when a forged workpiece is required to be taken out, the left auxiliary plate 3 and the right auxiliary plate 2 can be separated to realize the separation of a die, and the subsequent workpiece is convenient to take out; according to the utility model, the left annular plate 4 and the right annular plate 5 are arranged, so that when the left auxiliary plate 3 and the right auxiliary plate 2 are separated, the annular plates can be separated to two sides, and the subsequent workpiece can be taken out conveniently; according to the utility model, the motor IV 17, the threaded column IV 13 and the threaded column IV 14 are arranged, so that when the motor IV 17 is started, the two adjusting blocks 16 can be driven to move close to or away from each other, thereby realizing the separation and combination of the left auxiliary plate 3 and the right auxiliary plate 2, and facilitating the taking out of subsequent workpieces; the roller 29 effectively reduces the friction force between the regulating block 16 and the rotating plate 7, so that the regulating block 16 can move better when moving, the regulating block 16 is not easy to wear and damage, and the limiting plate 30 and the limiting post 31 are arranged, so that the regulating block 16 can only move left and right and cannot deviate from the direction.

As shown in fig. 1 and 5, the lower end surface of the rotating plate 7 is provided with a plurality of embedded grooves 702 in a surrounding manner, a plurality of rollers 8 are arranged in the embedded grooves 702, rotating columns 801 are fixedly arranged at two ends of the rollers 8, and the rotating columns 801 are respectively connected with two ends of the corresponding embedded grooves 702 in a rotating manner.

Through the arrangement, the roller 8 is arranged, so that the roller plays a role in supporting the rotating plate 7, the stability of the roller is improved, and the rotating plate 7 can rotate on the base 1 better.

Working principle: firstly, according to the requirements of a forged workpiece, a left template 24 and a right template 25 with required shapes are manufactured so that the left template and the right template can be combined to form a die, fixed columns 26 are fixedly arranged at two ends of the die, then a forging plate 18 matched with the die is manufactured, a connecting column 19 is fixedly arranged on the forging plate 18, the connecting column 19 is screwed into a threaded column III 20, then the fixed columns 26 are respectively screwed into a threaded column II 23, the threaded column III 601 drives a movable plate 9 to move downwards through a starting motor II 6, the lower end surface of the template abuts against the upper end surface of a sealing plate 22, then a metal blank to be forged is placed in the template, the starting motor I15 drives a rotating plate 7 to move at the moment, so that the forging plate 18 can realize full-scale uniform forging and pressing of the metal blank, the quality is effectively improved, and when the reverse side of the metal blank is required to be forged, only the starting motor II 6 is needed, the threaded column III 601 is driven to rotate to control the movable plate 9 to move upwards, and finally the motor III 27 is driven to drive a die rotating surface to move downwards, the lower end surface of the movable plate 9 is enabled to abut against the upper end surface of the sealing plate 22, and finally, the left template and the right template can be separated from the left template and the right template can be conveniently moved through the left template and the right template through a starting cylinder device 21, and the left template is conveniently and the left template is separated from the right template and the right template is conveniently and the left template is 14 and the left template is required to be moved, and the left and the front and the left template is 14 and the front and is required to be separated to be moved and the screw-screwed and the front side 14 to be moved; the motor one 15, the motor two 6, the motor three 27, the motor four 17 and the cylinder device 21 are all disclosed in the prior art, so that redundant description is not needed in the present application.

The above is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. The utility model provides a lathe for stainless steel work piece forging forming, includes base (1), base (1) lower extreme is fixed to be equipped with a plurality of stabilizer blades (101), base (1) upper end four corners is all fixed to be equipped with support column (10), support column (10) upper end is fixed to be equipped with roof (12), its characterized in that, base (1) lower extreme center is fixed to be equipped with motor one (15), the output of motor one (15) passes base (1) and rotating plate (7) lower extreme fixed connection, rotating plate (7) upper end is equipped with the bottom plate, bottom plate upper end both sides are fixed to be equipped with stand (11), stand (11) upper end is fixed to be equipped with the annular slab, annular slab upper end both sides are all fixed to be equipped with motor two (6), motor two (6) output passes annular slab and threaded column one (601) one end fixed connection, threaded column one (601) other end is passed moving plate (9) and bottom plate rotation connection, moving plate (9) and threaded column one (601) threaded connection, motor one end (901) is equipped with motor three (901) from moving plate (27) one side of being equipped with respectively, the die is fixedly arranged between the connecting pieces, an air cylinder device (21) is fixedly arranged at the upper end of the top plate (12), and the telescopic end of the air cylinder device (21) penetrates through the top plate (12) to be fixedly connected with the forging structure.

2. The machine tool for forging and forming the stainless steel workpiece according to claim 1, wherein the die consists of a left die plate (24) and a right die plate (25), the connecting piece comprises a fixing column (26) and a second threaded column (23), one ends, close to a third motor (27), of the left die plate (24) and the right die plate (25) are fixedly provided with the fixing column (26), one ends, far away from the left die plate (24) and the right die plate (25), of the fixing column (26) are respectively provided with a threaded groove, the second threaded column (23) is fixedly arranged in the threaded grooves through threaded connection, and the second threaded column (23) is fixedly connected with the output end of the third motor (27).

3. The machine tool for forging and forming the stainless steel workpiece according to claim 1, wherein the forging structure comprises a forging plate (18), a connecting column (19) and a threaded column III (20), the connecting column (19) is fixedly arranged at the upper end of the forging plate (18), a threaded groove is formed in one end, far away from the forging plate (18), of the connecting column (19), the threaded column III (20) is arranged in the threaded groove in a threaded connection mode, and one end, far away from the forging plate (18), of the threaded column III (20) is fixedly connected with the telescopic end of the cylinder device (21).

4. The machine tool for forging and forming the stainless steel workpiece according to claim 1, wherein the bottom plate comprises a left auxiliary plate (3) and a right auxiliary plate (2), one surface of the right auxiliary plate (2) contacted with the left auxiliary plate (3) is fixedly provided with a plurality of clamping blocks I (201), the positions of the left auxiliary plate (3) corresponding to the clamping blocks I (201) are respectively provided with clamping grooves I (301), the clamping blocks I (201) are clamped in the corresponding clamping grooves I (301), sealing plates (22) are fixedly arranged at the upper ends of the left auxiliary plate (3) and the right auxiliary plate (2), the sealing plates (22) are propped against each other, and the upper end faces of the sealing plates (22) are propped against the lower end faces of the templates.

5. The machine tool for forging and forming the stainless steel workpiece according to claim 4, wherein the annular plate comprises a left annular plate (4) and a right annular plate (5), two end ports of the right annular plate (5) are fixedly provided with clamping blocks II (501), two clamping grooves 401 are formed in positions, corresponding to the right annular plate (5), of the left annular plate (4), and the clamping blocks II (501) are clamped in the clamping grooves II (401).

6. The machine tool for forging and forming the stainless steel workpiece according to claim 5, wherein the lower end faces of the left auxiliary plate (3) and the right auxiliary plate (2) are fixedly provided with adjusting blocks (16), two sides of the upper end of the rotating plate (7) are fixedly provided with fixing plates (701), a threaded column IV (13) and a threaded column V (14) are arranged between the fixing plates (701) and the fixing plates (701), one ends of the threaded column IV (13) and the threaded column V (14) are respectively connected with the corresponding fixing plates (701) in a rotating mode, the threaded column IV (13) and the other ends of the threaded column V (14) are fixedly connected, the threaded column IV (13) and the threaded column V (14) respectively penetrate through the corresponding adjusting blocks (16) and the adjusting blocks (16), one side of the fixing plates (701) away from one side of the threaded column V (14) is fixedly provided with a motor IV (17), and the output end of the motor IV (17) penetrates through the fixing plates (701) and is fixedly connected with one end of the threaded column V (14) in a threaded mode.

7. The machine tool for forging and forming the stainless steel workpiece according to claim 6, wherein rolling grooves (28) are formed in two sides of the lower end face of the adjusting block (16), rollers (29) are arranged in the rolling grooves (28), main columns are fixedly arranged at two ends of the rollers (29), the main columns are respectively and rotatably connected with two ends of the corresponding rolling grooves (28), limit columns (31) are respectively and rotatably arranged at the front end and the rear end of the adjusting block (16), limit plates (30) are fixedly arranged at two ends of the limit columns (31) on the upper end face of the rotating plate (7), and the limit columns (31) are respectively and fixedly connected with the corresponding limit plates (30).

8. The machine tool for forging and forming the stainless steel workpiece according to claim 1, wherein a plurality of embedded grooves (702) are formed in the lower end face of the rotating plate (7) in a surrounding mode, a plurality of rollers (8) are arranged in the embedded grooves (702), rotating columns (801) are fixedly arranged at two ends of each roller (8), and the rotating columns (801) are respectively connected with two ends of the corresponding embedded grooves (702) in a rotating mode.