CN113198873B - Aluminum plate leveling device - Google Patents
Aluminum plate leveling device Download PDFInfo
- Publication number
- CN113198873B CN113198873B CN202110667567.4A CN202110667567A CN113198873B CN 113198873 B CN113198873 B CN 113198873B CN 202110667567 A CN202110667567 A CN 202110667567A CN 113198873 B CN113198873 B CN 113198873B
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- Prior art keywords
- leveling
- support
- mounting frame
- limiting
- rollers
- Prior art date
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims description 14
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 11
- 230000000712 assembly Effects 0.000 description 7
- 238000000429 assembly Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/05—Stretching combined with rolling
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/14—Particular arrangements for handling and holding in place complete dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Working Implements (AREA)
Abstract
The utility model relates to a leveling equipment's field especially relates to an aluminum plate leveling device, and it includes the leveling subassembly that sets gradually along vertical direction is no less than three, connects in every adjacent two sets of elastic connection spare between the leveling subassembly, is used for driving the adjustment mechanism that top leveling subassembly moved downwards, the leveling subassembly include the mounting frame of flat, along horizontal direction rotation support in a plurality of leveling rollers in the mounting frame, be used for driving a plurality of leveling rollers synchronous and homodromous drive mechanism, the leveling roller in every adjacent two sets of leveling subassemblies revolves to opposite, is located one side of its direction of delivery front end by last to lower third group and below leveling subassembly and all is equipped with guiding component. The utility model provides an effect that promotes panel flattening efficiency has.
Description
Technical Field
The application relates to the field of leveling equipment, in particular to an aluminum plate leveling device.
Background
Sheet metal such as aluminum sheet, steel sheet, etc. is subjected to flattening treatment before being subjected to stamping or the like. The core of the leveling machine is a leveling module, which generally comprises an upper seat and a lower seat, wherein two rows of compression rollers are respectively distributed on the upper seat and the lower seat, and the upper seat can be suspended above the lower seat by adopting an air cylinder, a spring or other devices. The gap between the upper seat and the lower seat is adjusted by the adjusting device, namely, the gap between the upper press roll and the lower press roll is changed. During operation, the plate to be leveled passes through the space between the upper pressing roller and the lower pressing roller, and is rolled by the upper pressing roller and the lower pressing roller, so that the leveling of the plate is realized.
However, in the existing leveling machines, the leveling mechanism is usually provided with only one set of leveling components, that is, one leveling machine only performs one leveling operation, and although the stress of the board can be eliminated to a certain extent, for some boards, the leveling needs to be performed again or even multiple times, and thus, another leveling machine or multiple leveling machines need to be adopted or one leveling machine needs to be reused for multiple times, which obviously has the defects of equipment cost and processing efficiency.
Disclosure of Invention
For promoting the flattening efficiency to panel, this application provides an aluminum plate leveling device.
The application provides an aluminum plate leveling device adopts following technical scheme:
the utility model provides an aluminum plate leveling device, includes along the leveling subassembly of three sets of not less than that vertical direction sets gradually, connect in every adjacent two sets of elastic connection spare between the leveling subassembly, be used for driving the adjustment mechanism that top leveling subassembly moved downwards, the leveling subassembly include the mounting frame of flat, along horizontal direction rotation support in a plurality of leveling rollers in the mounting frame, be used for driving a plurality of leveling rollers synchronous and homodromous drive mechanism, the leveling roller in every adjacent two sets of leveling subassemblies revolves to opposite, is located one side of its conveying direction front end by last to lower third group and below leveling subassembly and all is equipped with guiding component.
Preferably, the guide assembly comprises a guide plate and a plurality of guide rollers arranged at the top of the guide plate, and one end, far away from the leveling assembly, of the guide plate is obliquely arranged upwards.
Preferably, one end of the guide plate, which is close to the leveling component, is hinged to the side wall of the installation frame, and an elastic supporting piece is arranged between the bottom of the guide plate and the installation frame.
Preferably, the elastic support piece comprises a support sleeve, a support rod and a support spring, wherein one end of the support sleeve is hinged to the side wall of the installation frame, one end of the support sleeve is hinged to the bottom of the guide plate, the other end of the support rod is inserted into the support sleeve in a sliding mode, and the support spring is arranged between the support sleeve and the support rod.
Preferably, the adjusting mechanism comprises a plurality of connecting holes penetrating through the mounting frame in the vertical direction, a support column in the connecting holes in a one-to-one corresponding sliding manner, a limiting ring which is in threaded connection with the support column and located above the leveling components, a chain wheel which is rotationally connected with the support column and located above the limiting ring, a transmission chain sleeved outside the chain wheel, a driven gear coaxially and fixedly connected with the top surface of one chain wheel, a first driving motor fixedly connected with the support column, and a driving gear coaxially and fixedly connected with the output shaft of the first driving motor, wherein the driving gear is meshed with the driven gear, and circumferential limiting pieces are arranged between the corresponding limiting rings and the chain wheels on each support column.
Preferably, the circumferential limiting part comprises a plurality of limiting holes penetrating through the chain wheel along the length direction of the support, and a plurality of limiting rods fixedly connected with the limiting rings in a one-to-one corresponding sliding connection manner in the limiting holes along the length direction of the support.
Preferably, the elastic connecting piece comprises an adjusting spring sleeved on the support column, and the top end and the bottom end of the adjusting spring are respectively abutted to the upper side installation frame and the lower side installation frame.
Preferably, the transmission mechanism comprises fixed gears which are coaxially and fixedly connected to the leveling rollers in a one-to-one correspondence manner, a plurality of transmission gears which are meshed between every two adjacent fixed gears, and a second driving motor connected to one of the fixed gears.
In summary, the present application includes at least one of the following beneficial technical effects:
1. under the cooperation of leveling component, elastic connection piece, adjustment mechanism and direction subassembly, when the panel is level, make a plurality of leveling rollers in every group leveling component carry out synchronous syntropy rotation through drive mechanism, and the leveling roller in two adjacent groups leveling component revolves to opposite, carry panel one by one and get into between first layer and the second layer leveling component through conveyor, make the leveling component on top layer move downwards this moment through adjustment mechanism, under the elastic action of a plurality of elastic connection pieces, make the interval between every layer of leveling component reduce gradually, under the cooperation of first layer leveling roller and second layer leveling roller, the panel carries out first leveling, when the panel is on the direction subassembly that moves to one side of third layer leveling component, and through the direction effect of direction subassembly, make the panel get into between second layer and the third layer leveling component, under the cooperation of second layer leveling roller and third layer leveling roller, according to the actual conditions of panel, set up three-layer or more leveling component, with the panel carries out the second leveling or continuous operation between every layer leveling component, and the continuous operation can take the continuous operation to the lower than a plurality of layers through the continuous leveling roller, the upper and lower than the continuous operation of the roll can change the time of the upper and lower operation of the roll, the upper and lower operation of a plurality of the upper and lower layer of the upper and lower operation of the roll can change the cost is convenient, the upper and lower than the upper and lower operation of the roll is convenient, the upper and lower operation of the roll is changed;
2. the guide plates in the guide assemblies are elastically hinged to the side parts of the mounting frame through the elastic supporting pieces, so that when the plates are conveyed to the position where one ends extend out of the upper side leveling assemblies and the lower side leveling assemblies, the inclined guide plates support the end parts of the plates, bending of the plates due to self weight is reduced, after the plates completely fall onto the guide plates, impact force between the plates and the guide plates is buffered through the elasticity of the elastic supporting pieces, deformation of the plates due to overlarge impact force is reduced, and the plates are easy to move towards the leveling assemblies under the cooperation of a plurality of guide rollers;
3. under the cooperation of pillar, the spacing ring, the sprocket, driven gear, driving gear and first driving motor, when adjusting the interval between every layer of flattening subassembly, through starting first driving motor, make first driving motor drive one of them sprocket with driving gear and driven gear and carry out synchronous rotation, and make a plurality of sprockets carry out synchronous rotation through the drive chain, thereby can make a plurality of rotations connect in the sprocket of pillar drive the spacing ring through the gag lever post and carry out synchronous rotation, the spacing ring rotates the back and removes along pillar length direction, and the flattening subassembly on drive top layer moves or moves upwards through the elasticity orientation of elastic connection spare, make the pillar of connecting in a plurality of flattening subassemblies.
Drawings
Fig. 1 is a schematic overall structure of the present embodiment.
Fig. 2 is a schematic view of the structure of the leveling assembly and the guiding assembly in this embodiment.
Fig. 3 is a partial enlarged view of a portion a in fig. 1.
Fig. 4 is a partial cross-sectional view of the present embodiment.
Reference numerals illustrate: 1. leveling the assembly; 2. an elastic connection member; 3. an adjusting mechanism; 4. a guide assembly; 5. a mounting frame; 6. leveling rollers; 7. a transmission mechanism; 8. a fixed gear; 9. a transmission gear; 10. a second driving motor; 11. a connection hole; 12. a support post; 13. a limiting ring; 14. a sprocket; 15. a drive chain; 16. a driven gear; 17. a first driving motor; 18. a drive gear; 19. a circumferential limit member; 20. a limiting hole; 21. a limit rod; 22. an adjusting spring; 23. a guide plate; 24. a guide roller; 25. an elastic support; 26. a support sleeve; 27. a support rod; 28. and a support spring.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-4.
The embodiment of the application discloses aluminum plate leveling device. Referring to fig. 1, an aluminum plate leveling device includes leveling component 1, elastic connection piece 2, adjustment mechanism 3, direction subassembly 4, wherein, leveling component 1 has set gradually along vertical direction and is no less than three sets of, and the time that each adjacent two sets of leveling component 1 cooperatees each other can carry out once leveling to the panel, specific group number is adjusted according to the number of times of panel actual need flattening, every adjacent two sets of leveling component 1 all carries out elastic connection on the vertical direction through four sets of elastic connection piece 2, from top to bottom third group and below leveling component 1 is located the one side of conveying direction front end and all forms a complete set and is equipped with direction subassembly 4 for will drop to between the panel on the direction subassembly 4 is leading-in adjacent two sets of leveling component 1, adjustment mechanism 3 is used for driving top leveling component 1 orientation downward removal.
Referring to fig. 1 and 2, the leveling assembly 1 comprises a horizontally arranged rectangular mounting frame 5, a plurality of leveling rollers 6 rotatably supported in the mounting frame 5 along the horizontal direction, and a transmission mechanism 7 for driving the leveling rollers 6 to synchronously and co-rotate, wherein the leveling rollers 6 in every two adjacent leveling assemblies 1 are driven by the transmission mechanism 7 to do opposite rotation.
Referring to fig. 1 and 2, one end of the leveling roller 6 extends to the outside of the installation frame 5 through the installation frame 5, and the transmission mechanism 7 comprises fixed gears 8 coaxially and fixedly connected to the leveling roller 6 one by one and located at the outside of the installation frame 5, a plurality of transmission gears 9 co-meshed between every two adjacent fixed gears 8, and a second driving motor 10 connected to one of the fixed gears 8, wherein the transmission gears 9 are all rotatably connected to the outer side wall of the installation frame 5.
Referring to fig. 1 and 3, the adjusting mechanism 3 includes four connecting holes 11 penetrating the mounting frame 5 in the vertical direction, a pillar 12 slidably connected in the connecting holes 11 in a one-to-one correspondence manner and arranged in the vertical direction, a limiting ring 13 screwed on the pillar 12 and located above the leveling components 1, a sprocket 14 rotatably connected on the pillar 12 and located above the limiting ring 13, a driving chain 15 sleeved outside the sprockets 14, a driven gear 16 coaxially and fixedly connected on the top surface of one of the sprockets 14, a first driving motor 17 fixedly connected on the pillar 12, and a driving gear 18 coaxially and fixedly connected on the output shaft of the first driving motor 17, wherein the driving gear 18 is meshed with the driven gear 16, the four connecting holes 11 are respectively located at positions of the mounting frame 5 close to four corners, the pillars 12 are respectively correspondingly provided with four, the mounting frame 5 is slidably connected on the four pillars 12 through the four connecting holes 11, and the limiting ring 13 and the sprocket 14 are respectively provided with four corresponding four pillars 12.
Referring to fig. 1 and 3, a circumferential limiting member 19 is disposed between the corresponding limiting ring 13 and the sprocket 14 on each strut 12, the circumferential limiting member 19 includes a plurality of limiting holes 20 penetrating the sprocket 14 and the driven gear 16 along the length direction of the strut 12, and a plurality of limiting rods 21 fixedly connected to the limiting ring 13 and slidably connected to the limiting holes 20 along the length direction of the strut 12, so as to limit the circumferential rotation position between the limiting ring 13 and the sprocket 14 and enable the limiting ring 13 to axially move relative to the sprocket 14 under the cooperation of the limiting holes 20 and the limiting rods 21.
Referring to fig. 1, the elastic connection member 2 includes an adjusting spring 22 sleeved on the pillar 12, and the length of the adjusting spring 22 decreases from the lower layer to the upper layer, so that the distance between every two adjacent leveling assemblies 1 is kept consistent, and the top and bottom ends of the adjusting spring 22 are respectively abutted between the mounting frames 5 on the upper and lower sides.
Referring to fig. 1 and 3, in cooperation with the post 12, the stop collar 13, the sprocket 14, the driven gear 16, the driving gear 18 and the first driving motor 17, when the space between each leveling component 1 is adjusted, by starting the first driving motor 17, the first driving motor 17 drives one of the sprockets 14 to synchronously rotate by using the driving gear 18 and the driven gear 16, and synchronously rotates a plurality of sprockets 14 through the driving chain 15, so that the sprockets 14 connected to the post 12 can synchronously rotate by driving the stop collar 13 through the stop lever 21, the stop collar 13 moves along the length direction of the post 12 after rotating, and drives the leveling component 1 on the top layer to move downwards or upwards through the elasticity of the elastic connecting piece 2, so that the post 12 connected to the leveling components 1.
Referring to fig. 2 and 4, the guide assembly 4 includes a guide plate 23, a plurality of guide rollers 24 disposed at the top of the guide plate 23, wherein one end of the guide plate 23 far away from the leveling assembly 1 is disposed obliquely upward, one end of the guide plate 23 near the leveling assembly 1 is hinged to the side wall of the installation frame 5, and an elastic supporting member 25 is disposed between the bottom of the guide plate 23 and the installation frame 5.
Referring to fig. 2 and 4, the elastic support 25 includes a support sleeve 26 having one end hinged to a side wall of the mounting frame 5, a support rod 27 having one end hinged to a bottom of the guide plate 23 and the other end slidably inserted into the support sleeve 26, and a support spring 28 provided between the support sleeve 26 and the support rod 27.
Referring to fig. 1 and 3, when a plate is conveyed to a position where one end extends out between the upper and lower leveling assemblies 1, the end of the plate is supported by the inclined guide plate 23, bending of the plate due to self weight is reduced, after the plate falls onto the guide plate 23 completely, impact force between the plate and the guide plate 23 is buffered by the elasticity of the elastic supporting piece 25, deformation of the plate due to overlarge impact force is reduced, and the plate is easy to move towards the leveling assembly 1 under the cooperation of the guide rollers 24.
The implementation principle of the aluminum plate leveling device in the embodiment of the application is as follows:
when the panel is leveled, make a plurality of leveling rollers 6 in every group leveling subassembly 1 through drive mechanism 7 synchronous syntropy rotate, and the leveling roller 6 in two adjacent groups leveling subassembly 1 revolve to opposite, carry the panel one by one and get into between first layer and the second floor leveling subassembly 1 through conveyor, make the leveling subassembly 1 on top layer move downwards through adjustment mechanism 3 this moment, under the elastic action of a plurality of elastic connection piece 2, make the interval between every layer of leveling subassembly 1 reduce gradually, under the cooperation of first layer leveling roller 6 and second floor leveling roller 6, carry out primary leveling to the panel.
When the panel is moving to the terminal of second floor's flattening subassembly 1, support panel tip through deflector 23 that inclines, reduce the condition that the panel was buckled because of the dead weight takes place, after the panel drops on deflector 23 completely, cushion the impact force between panel and the deflector 23 through the elasticity of elastic support piece 25, reduce the panel and receive the too big and take place the condition of deformation of impact force, under the cooperation of a plurality of guide rolls 24, make the panel remove towards the direction of flattening subassembly 1, the panel gets into between second floor and the third floor's flattening subassembly 1, under the cooperation of second floor's flattening roller 6 and third floor's flattening roller 6, carry out the secondary flattening to the panel.
According to the actual conditions of panel, set up three-layer or more layer flattening subassembly 1 to carry out secondary or many times flattening to panel, and panel can carry out continuous flattening operation, promote the machining efficiency of panel, from top to bottom second floor and below flattening subassembly 1 can be practical as last roller and lower roller simultaneously, under the cooperation of direction subassembly 4, panel every decline one deck, automatic change its direction of delivery, reduced the cost and the occupation space of equipment, and through a set of adjustment mechanism 3, can change the whole interval of a plurality of layer flattening subassemblies 1 simultaneously, it is more convenient to operate.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (5)
1. An aluminum plate leveling device, its characterized in that: the leveling device comprises at least three leveling components (1) which are sequentially arranged along the vertical direction, elastic connecting pieces (2) connected between every two adjacent leveling components (1), and an adjusting mechanism (3) for driving the topmost leveling component (1) to move downwards, wherein the leveling components (1) comprise a horizontally arranged mounting frame (5), a plurality of leveling rollers (6) which are rotatably supported in the mounting frame (5) along the horizontal direction, and a transmission mechanism (7) for driving the plurality of leveling rollers (6) to synchronously and synchronously rotate in the same direction, the leveling rollers (6) in each two adjacent leveling components (1) are opposite in rotation direction, and one side, from top to bottom, of the leveling components (1) of a third group and below, which are positioned at the front end in the conveying direction, is provided with a guide component (4);
the adjusting mechanism (3) comprises a plurality of connecting holes (11) penetrating through the mounting frame (5) along the vertical direction, support posts (12) which are in one-to-one correspondence sliding connection in the connecting holes (11), limiting rings (13) which are in threaded connection with the support posts (12) and are positioned above the leveling components (1), chain wheels (14) which are rotatably connected with the support posts (12) and are positioned above the limiting rings (13), a transmission chain (15) sleeved outside the chain wheels (14), driven gears (16) which are coaxially and fixedly connected with the top surfaces of one chain wheel (14), a first driving motor (17) which is fixedly connected with the support posts (12), and a driving gear (18) which is coaxially and fixedly connected with the output shaft of the first driving motor (17), wherein the driving gear (18) is meshed with the driven gears (16), and circumferential limiting pieces (19) are arranged between the corresponding limiting rings (13) on each support post (12) and the chain wheel (14);
the circumferential limiting piece (19) comprises a plurality of limiting holes (20) penetrating through the chain wheel (14) along the length direction of the support column (12), and a plurality of limiting rods (21) fixedly connected with the limiting rings (13) and correspondingly connected in the limiting holes (20) in a sliding manner along the length direction of the support column (12);
the elastic connecting piece (2) comprises an adjusting spring sleeved on the support column (12), the top end and the bottom end of the adjusting spring (22) are respectively abutted to the upper side and the lower side of the mounting frame (5), and the length of the adjusting spring (22) is gradually decreased from the lower layer to the upper layer.
2. An aluminum plate leveling device as recited in claim 1, wherein: the guide assembly (4) comprises a guide plate (23) and a plurality of guide rollers (24) arranged at the top of the guide plate (23), and one end, far away from the leveling assembly (1), of the guide plate (23) is obliquely arranged upwards.
3. An aluminum plate leveling device as recited in claim 2, wherein: one end of the guide plate (23) close to the leveling component (1) is hinged to the side wall of the mounting frame (5), and an elastic supporting piece (25) is arranged between the bottom of the guide plate (23) and the mounting frame (5).
4. An aluminum plate flattening apparatus in accordance with claim 3, wherein: the elastic support piece (25) comprises a support sleeve (26) with one end hinged to the side wall of the mounting frame (5), a support rod (27) with one end hinged to the bottom of the guide plate (23) and the other end slidably inserted into the support sleeve (26), and a support spring (28) arranged between the support sleeve (26) and the support rod (27).
5. An aluminum plate leveling device as recited in claim 1, wherein: the transmission mechanism (7) comprises fixed gears (8) which are coaxially and fixedly connected to the leveling rollers (6) in a one-to-one correspondence manner, a plurality of transmission gears (9) which are meshed between every two adjacent fixed gears (8), and a second driving motor (10) which is connected to one of the fixed gears (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110667567.4A CN113198873B (en) | 2021-06-16 | 2021-06-16 | Aluminum plate leveling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110667567.4A CN113198873B (en) | 2021-06-16 | 2021-06-16 | Aluminum plate leveling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113198873A CN113198873A (en) | 2021-08-03 |
| CN113198873B true CN113198873B (en) | 2024-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110667567.4A Active CN113198873B (en) | 2021-06-16 | 2021-06-16 | Aluminum plate leveling device |
Country Status (1)
| Country | Link |
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| CN (1) | CN113198873B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117324424B (en) * | 2023-11-29 | 2024-02-09 | 甘肃志特新材料科技有限公司 | Shaping device and method for producing and processing building aluminum templates |
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| GB1041849A (en) * | 1962-09-13 | 1966-09-07 | Siemag Siegener Masch Bau | Improvements in or relating to roller levellers |
| US4313322A (en) * | 1978-06-02 | 1982-02-02 | Schloemann-Siemag Aktiengesellschaft | Straightening machine for metal plate and strip |
| US5189896A (en) * | 1992-03-02 | 1993-03-02 | Mesta International | Single stand roller leveller for heavy plate |
| CN200977532Y (en) * | 2006-12-04 | 2007-11-21 | 蔡昌益 | Multiple die holder steel plate correction machine |
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| Publication number | Publication date |
|---|---|
| CN113198873A (en) | 2021-08-03 |
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