CN114985563A - Plate stamping device - Google Patents
Plate stamping device Download PDFInfo
- Publication number
- CN114985563A CN114985563A CN202210915523.3A CN202210915523A CN114985563A CN 114985563 A CN114985563 A CN 114985563A CN 202210915523 A CN202210915523 A CN 202210915523A CN 114985563 A CN114985563 A CN 114985563A
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- China
- Prior art keywords
- plate
- rotating shaft
- stamping
- workbench
- pulley
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 abstract description 10
- 238000004080 punching Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003031 feeding effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/13—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by linearly moving tables
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention relates to the technical field of plate stamping, and discloses a plate stamping device which comprises a workbench, a stamping mechanism and an intermittent feeding mechanism, wherein the stamping mechanism comprises a stamping mechanism body and a feeding mechanism body; the stamping mechanism comprises a sliding rod which is connected with the top plate in a sliding manner, one end of the sliding rod, which is close to the workbench, is provided with a mounting plate, and a punch matched with the stamping die is arranged on the mounting plate; intermittent type feed mechanism, including setting up in the first backup pad of workstation both sides, first backup pad rotates connects first pivot, and first pivot is close to the one end fixed connection rotor plate at workstation center, can dismantle on the rotor plate and be connected with the double-screw bolt, and the one end that the double-screw bolt is close to the workstation center rotates and is connected with the layer board with cushion complex, and the one end that workstation center was kept away from to first pivot is connected with synchronous runner assembly. The invention is suitable for a plate stamping device, so that the stamping operation of the plate is realized in the intermittent moving process, and the safety of the whole device is improved without the need of an operator to contact the plate in the whole processing process.
Description
Technical Field
The invention relates to the technical field of plate stamping, in particular to a plate stamping device.
Background
The stamping is a forming method in which a press and a die are used to apply external force to a plate, a strip, a pipe, a profile, etc. to cause plastic deformation or separation, thereby obtaining a workpiece (stamped part) of a desired shape and size. In particular, in the processing of a plate material, a press machine is often used for press processing.
However, in some existing punching devices, during the process, an operator needs to hold the plate for punching to achieve the feeding effect, which results in lower safety of the device, and therefore needs to be improved.
Disclosure of Invention
The invention provides a sheet material stamping device, which solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a sheet stamping device comprises a workbench, wherein a cushion block is arranged on the workbench, a stamping die is arranged on the cushion block, support frames are arranged on two sides of the workbench, one end, far away from the ground, of each support frame is fixedly connected with a top plate, and the sheet stamping device further comprises a stamping mechanism and an intermittent feeding mechanism;
the stamping mechanism comprises a sliding rod which is connected with a top plate in a sliding manner, one end of the sliding rod, which is close to the workbench, is provided with a mounting plate, a punch matched with the stamping die is arranged on the mounting plate, and the top plate is provided with a reciprocating driving assembly which drives the sliding rod to move;
intermittent type feed mechanism, including setting up in the first backup pad of workstation both sides, first backup pad rotates connects first pivot, and first pivot is close to the one end fixed connection rotor plate at workstation center, can dismantle on the rotor plate and be connected with the double-screw bolt, and the one end that the double-screw bolt is close to the workstation center rotates and is connected with the layer board with cushion complex, and the one end that workstation center was kept away from to first pivot is connected with synchronous runner assembly.
As a preferable technical scheme of the invention, two sides of the mounting plate are slidably connected with guide rods, one end of each guide rod, which is close to the workbench, is provided with a pressing plate, a spring is arranged between each pressing plate and the mounting plate, and one side of each sliding rod, which is far away from the workbench, is slidably connected with a top plate.
As a preferred technical scheme of the present invention, the workbench is provided with a driving motor, an output shaft of the driving motor is fixedly connected to a first belt pulley, the first belt pulley is connected to a second belt pulley through a first belt, the second belt pulley is fixedly connected to a third rotating shaft, the workbench is provided with a second supporting plate, and the second supporting plate is rotatably connected to the third rotating shaft.
As a preferable technical scheme of the invention, the reciprocating driving component comprises a third supporting plate fixedly connected with the top plate, the third supporting plate is rotatably connected with a fourth rotating shaft, a crank is arranged in the middle of the fourth rotating shaft, the middle of the crank is rotatably connected with one end of a supporting rod, and the other end of the supporting rod is rotatably connected with a sliding rod.
As a preferable technical solution of the present invention, a sixth belt wheel is provided on the third rotating shaft, the sixth belt wheel is connected to a seventh belt wheel through a third belt, and the seventh belt wheel is fixedly connected to an end of the fourth rotating shaft.
As a preferable technical scheme of the invention, the synchronous rotating assembly comprises a third rotating shaft which is rotatably connected with the second supporting plate, a third belt wheel is arranged on the third rotating shaft, the third belt wheel is connected with a fourth belt wheel through a second belt, and the fourth belt wheel is fixedly connected with the first rotating shaft.
As a preferable technical scheme of the invention, a second rotating shaft is arranged on the side wall of the workbench, and a fifth belt wheel matched with the second belt is arranged on the second rotating shaft.
As a preferred technical scheme of the invention, the rotating plate is provided with a limiting hole, the limiting hole penetrates through the connecting stud, and the stud is in threaded connection with a locking nut.
The invention has the following advantages:
the plate stamping device is suitable for a plate stamping device, the plate can be moved intermittently by the supporting plate through the synchronous rotating assembly, the plate stamping operation is realized in the intermittent movement process, an operator does not need to contact the plate in the whole processing process, and the safety of the whole device is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a sheet material stamping device.
Fig. 2 is a schematic structural view of an intermittent feeding mechanism in a sheet punching device.
Fig. 3 is a front view of an intermittent feed mechanism in a sheet punching apparatus.
Fig. 4 is a schematic structural view of the bottom of an intermittent feed mechanism in a sheet punching device.
Fig. 5 is a schematic structural view of a punching mechanism in a sheet punching device.
Fig. 6 is a schematic structural view of a reciprocating drive assembly in a sheet punching apparatus.
Fig. 7 is an elevation view of a reciprocating drive assembly in a sheet punching device.
In the figure: 1. a base plate; 2. supporting legs; 3. a work table; 4. a support frame; 5. a top plate; 6. cushion blocks; 7. punching a die; 8. a yielding groove; 9. a rotating plate; 10. a first support plate; 11. a first rotating shaft; 12. a limiting hole; 13. locking the nut; 14. a stud; 15. a support plate; 16. a fourth pulley; 17. a fifth pulley; 18. a second rotating shaft; 19. a second belt; 20. a third pulley; 21. a third rotating shaft; 22. a second support plate; 23. a drive motor; 24. a first pulley; 25. a first belt; 26. a second pulley; 27. a sixth pulley; 28. a third belt; 29. a seventh pulley; 30. a fourth rotating shaft; 31. a third support plate; 32. a crank; 33. a support bar; 34. a slide bar; 35. mounting a plate; 36. a punch; 37. pressing a plate; 38. a spring; 39. a guide rod; 40. a reciprocating drive assembly; 41. a synchronous rotation assembly; 42. a stamping mechanism; 43. an intermittent feeding mechanism.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In one embodiment, please refer to fig. 1 to 7, a sheet stamping apparatus includes a workbench 3, a pad 6 is disposed on the workbench 3, a stamping die 7 is disposed on the pad 6, the pad 6 is of a hollow structure, and the pad 6 is detachably connected to the stamping die 7, different stamping dies 7 can be replaced according to different stamping requirements, support frames 4 are disposed on two sides of the workbench 3, one end of each support frame 4, which is far away from the ground, is fixedly connected to a top plate 5, support frames 4 are disposed on the left and right sides of the upper surface of the workbench 3, the support frames 4 are of a U-shaped structure, and the upper end of each support frame 4 is fixedly connected to the left and right ends of the top plate 5, and further includes a stamping mechanism 42 and an intermittent feeding mechanism 43;
the stamping mechanism 42 comprises a sliding rod 34 connected with the top plate 5 in a sliding manner, one end of the sliding rod 34 close to the workbench 3 is provided with a mounting plate 35, a punch 36 matched with the stamping die 7 is arranged on the mounting plate 35, the top plate 5 is provided with a reciprocating driving assembly 40 for driving the sliding rod 34 to move, the middle part of the top plate 5 is connected with the sliding rod 34 in a vertical sliding manner, the lower end of the sliding rod 34 is fixedly connected with the middle part of the mounting plate 35, the lower surface of the mounting plate 35 is detachably connected with the punch 36, the punch 36 is matched with the stamping die 7 to complete stamping processing operation, and the reciprocating driving assembly 40 can drive the sliding rod 34 to move vertically;
the intermittent feeding mechanism 43 comprises first supporting plates 10 arranged at two sides of a workbench 3, the first supporting plates 10 are rotatably connected with first rotating shafts 11, one ends of the first rotating shafts 11, which are close to the center of the workbench 3, are fixedly connected with rotating plates 9, studs 14 are detachably connected on the rotating plates 9, one ends of the studs 14, which are close to the center of the workbench 3, are rotatably connected with supporting plates 15 matched with cushion blocks 6, one ends of the first rotating shafts 11, which are far away from the center of the workbench 3, are connected with synchronous rotating assemblies 41, the front side and the rear side of the workbench 3 are both provided with the abdication groove 8, the left side and the right side of the abdication groove 8 are both provided with the first supporting plate 10, the rotating plate 9 is provided with the stud 14, the stud 14 is rotatably connected with the left side and the right side of the supporting plate 15, thereby, the supporting plate 15 rotates around the first rotating shaft 11, and the synchronous rotating assembly 41 can realize the synchronous rotation effect of the two first rotating shafts 11 on the front side or the rear side.
In one aspect of this embodiment, the two sides of the mounting plate 35 are slidably connected with guide rods 39, one end of each guide rod 39 close to the workbench 3 is provided with a pressing plate 37, a spring 38 is arranged between the pressing plate 37 and the mounting plate 35, and one side of each slide rod 34 far away from the workbench 3 is slidably connected with the top plate 5. When the sliding rod 34 moves up and down, the pressing plate 37 is driven to move up and down, and the left side and the right side of the plate are pressed tightly through the pressing plate 37, so that the plate cannot slide when the punch 36 and the die 7 complete the punching operation, and the punching precision is improved.
In one aspect of this embodiment, a driving motor 23 is disposed on the worktable 3, an output shaft of the driving motor 23 is fixedly connected to a first belt pulley 24, the first belt pulley 24 is connected to a second belt pulley 26 through a first belt 25, the second belt pulley 26 is fixedly connected to a third rotating shaft 21, a second supporting plate 22 is disposed on the worktable 3, and the second supporting plate 22 is rotatably connected to the third rotating shaft 21. The front and back both ends on workstation 3 lower surface right side have set up second backup pad 22, driving motor 23 drives third pivot 21 and rotates, it carries out work to drive reciprocal drive assembly 40 and synchronous rotating assembly 41 through third pivot 21, single drive unit, make the control of the work rhythm of this device more convenient, only need through the diameter change between the band pulley can, after selecting suitable band pulley size, driving motor 23 only need carry out power take off can, the control of whole device also only needs opening of control driving motor 23 and stops.
In one aspect of the present embodiment, the reciprocating driving assembly 40 includes a third supporting plate 31 fixedly connected to the top plate 5, the third supporting plate 31 is rotatably connected to a fourth rotating shaft 30, a crank 32 is provided at a middle portion of the fourth rotating shaft 30, the middle portion of the crank 32 is rotatably connected to one end of a supporting rod 33, and the other end of the supporting rod 33 is rotatably connected to a sliding rod 34. Third supporting plates 31 are arranged on the front side and the rear side of the middle part of the top plate 5, the upper ends of the third supporting plates 31 are rotatably connected with a fourth rotating shaft 30, and the middle part of the fourth rotating shaft 30 drives a sliding rod 34 to move up and down through a crank 32 and a supporting rod 33, so that a punch 36 moves up and down. A sixth belt wheel 27 is arranged on the third rotating shaft 21, the sixth belt wheel 27 is connected with a seventh belt wheel 29 through a third belt 28, and the seventh belt wheel 29 is fixedly connected with the end part of a fourth rotating shaft 30. The fourth shaft 30 and the third shaft 21 can be rotated synchronously by the third belt 28, that is, the driving motor 23 can move the punch 36 up and down.
In one aspect of the present embodiment, the synchronous rotating assembly 41 includes a third rotating shaft 21 rotatably connected to the second support plate 22, a third pulley 20 is disposed on the third rotating shaft 21, the third pulley 20 is connected to a fourth pulley 16 through a second belt 19, and the fourth pulley 16 is fixedly connected to the first rotating shaft 11. And a second rotating shaft 18 is arranged on the side wall of the workbench 3, and a fifth belt pulley 17 matched with a second belt 19 is arranged on the second rotating shaft 18. The fifth pulley 17 can realize the effect of a tension pulley, so that the second belt 19 can stably transmit the rotation of the third rotating shaft 21 to the first rotating shaft 11, thereby rotating the supporting plate 15.
In one aspect of this embodiment, the rotating plate 9 is provided with a limiting hole 12, the limiting hole 12 penetrates through a connecting stud 14, and a locking nut 13 is screwed on the stud 14. The stud 14 is inserted into the proper limiting hole 12, and the stud 14 is fixed with the limiting hole 12 through the lock nut 13, so that the rotating radius of the stud 14 is adjustable, namely the moving height of the supporting plate 15 is adjustable, and the length of each feeding of the plate is changed.
In the implementation process, the supporting legs 2 are arranged at four corners of the lower surface of the workbench 3, the base plate 1 is arranged at the lower end of each supporting leg 2, so that the whole device can be stably placed on the ground, a proper stamping die 7 and a proper stamping head 36 are selected according to the size requirement of stamping, plates are placed on the two supporting plates 15, and the supporting plates 15 can support the plates.
The driving motor 23 is started, the driving motor 23 enables the reciprocating driving assembly 40 and the synchronous rotating assembly 41 to start to rotate, the first rotating shaft 11 drives the supporting plate 15 to rotate, for example, the supporting plate 15 rotates clockwise, when the supporting plate 15 moves upwards, the plate can be lifted from the cushion block 6, at the moment, the plate moves towards the right side along with the supporting plate 15, when the supporting plate 15 moves to the lower side of the cushion block 6, the plate falls on the cushion block 6, so that the plate can intermittently move towards the right side along with the continuous clockwise rotation of the supporting plate 15, and in a clearance of each movement, the reciprocating driving assembly 40 can push the punch 36 to move downwards, the punch 36 and the punch die 7 are matched to complete the punching processing of the plate, and therefore, the plate completes the whole punching processing in the intermittent right movement process.
The invention is suitable for a plate stamping device, the plate can be intermittently moved by the supporting plate 15 by arranging the synchronous rotating assembly 41, so that the stamping operation of the plate can be realized in the intermittent moving process, an operator does not need to contact the plate in the whole processing process, and the safety of the whole device is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. A sheet stamping device comprises a workbench, wherein a cushion block is arranged on the workbench, a stamping die is arranged on the cushion block, support frames are arranged on two sides of the workbench, and one end, far away from the ground, of each support frame is fixedly connected with a top plate;
the stamping mechanism comprises a sliding rod which is connected with a top plate in a sliding manner, one end of the sliding rod, which is close to the workbench, is provided with a mounting plate, a punch matched with the stamping die is arranged on the mounting plate, and the top plate is provided with a reciprocating driving assembly which drives the sliding rod to move;
intermittent type feed mechanism, including setting up in the first backup pad of workstation both sides, first backup pad rotates connects first pivot, and first pivot is close to the one end fixed connection rotor plate at workstation center, can dismantle on the rotor plate and be connected with the double-screw bolt, and the one end that the double-screw bolt is close to the workstation center rotates and is connected with the layer board with cushion complex, and the one end that workstation center was kept away from to first pivot is connected with synchronous runner assembly.
2. The sheet stamping device according to claim 1, wherein the two sides of the mounting plate are slidably connected with guide rods, one end of each guide rod close to the workbench is provided with a pressing plate, a spring is arranged between the pressing plate and the mounting plate, and one side of each slide rod far away from the workbench is slidably connected with the top plate.
3. The sheet stamping device as claimed in claim 1, wherein the worktable is provided with a driving motor, an output shaft of the driving motor is fixedly connected with a first belt wheel, the first belt wheel is connected with a second belt wheel through a first belt, the second belt wheel is fixedly connected with a third rotating shaft, the worktable is provided with a second supporting plate, and the second supporting plate is rotatably connected with the third rotating shaft.
4. The sheet stamping device according to claim 3, wherein the reciprocating driving assembly includes a third supporting plate fixedly connected to the top plate, the third supporting plate is rotatably connected to a fourth rotating shaft, a crank is disposed in a middle portion of the fourth rotating shaft, the middle portion of the crank is rotatably connected to one end of the supporting rod, and the other end of the supporting rod is rotatably connected to the sliding rod.
5. The sheet stamping device as claimed in claim 4, wherein a sixth pulley is disposed on the third shaft, the sixth pulley is connected to a seventh pulley through a third belt, and the seventh pulley is fixedly connected to an end of the fourth shaft.
6. The sheet stamping device according to claim 3, wherein the synchronous rotating assembly includes a third rotating shaft rotatably connected to the second support plate, the third rotating shaft is provided with a third pulley, the third pulley is connected to a fourth pulley through a second belt, and the fourth pulley is fixedly connected to the first rotating shaft.
7. The sheet stamping device according to claim 6, wherein a second rotating shaft is provided on the sidewall of the worktable, and a fifth belt wheel engaged with the second belt is provided on the second rotating shaft.
8. The sheet stamping device according to claim 1, wherein the rotating plate is provided with a limiting hole, the limiting hole penetrates through the connecting stud, and a locking nut is connected to the stud through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210915523.3A CN114985563A (en) | 2022-08-01 | 2022-08-01 | Plate stamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210915523.3A CN114985563A (en) | 2022-08-01 | 2022-08-01 | Plate stamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114985563A true CN114985563A (en) | 2022-09-02 |
Family
ID=83022136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210915523.3A Pending CN114985563A (en) | 2022-08-01 | 2022-08-01 | Plate stamping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114985563A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117862354A (en) * | 2023-04-03 | 2024-04-12 | 山东润成建材有限公司 | A punching device and method for mechanical processing |
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| CN210943717U (en) * | 2019-10-25 | 2020-07-07 | 百能数控设备（福建）有限公司 | Turnover positioning mechanism for glass processing center |
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| CN113104673A (en) * | 2021-03-17 | 2021-07-13 | 三峡大学 | Ear belt feeding and swinging device of mask machine and using method |
| CN113245425A (en) * | 2021-06-23 | 2021-08-13 | 浙江易锻精密机械有限公司 | Automatic feeding and discharging device for stamping |
| CN215090300U (en) * | 2021-05-11 | 2021-12-10 | 湖北卓冠交通设施有限公司 | Stamping equipment is used in traffic facilities processing |
| CN113787139A (en) * | 2021-09-04 | 2021-12-14 | 李考 | Three-dimensional punching machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103231886A (en) * | 2013-05-14 | 2013-08-07 | 成都晨晖弹簧制造有限公司 | Spring conveying frame with variable height |
| CN107187808A (en) * | 2017-06-30 | 2017-09-22 | 宝鸡银康机械设备有限公司 | Spacing feed arrangement with eccentric lifting transfer organization |
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| CN210943717U (en) * | 2019-10-25 | 2020-07-07 | 百能数控设备（福建）有限公司 | Turnover positioning mechanism for glass processing center |
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| CN113245425A (en) * | 2021-06-23 | 2021-08-13 | 浙江易锻精密机械有限公司 | Automatic feeding and discharging device for stamping |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117862354A (en) * | 2023-04-03 | 2024-04-12 | 山东润成建材有限公司 | A punching device and method for mechanical processing |
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