CN114749556B - Aluminum-magnesium-zinc roll forming frame profile forming device - Google Patents
Aluminum-magnesium-zinc roll forming frame profile forming device Download PDFInfo
- Publication number
- CN114749556B CN114749556B CN202210532809.3A CN202210532809A CN114749556B CN 114749556 B CN114749556 B CN 114749556B CN 202210532809 A CN202210532809 A CN 202210532809A CN 114749556 B CN114749556 B CN 114749556B
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- Prior art keywords
- hydraulic cylinder
- rotating
- section bar
- rod
- roll forming
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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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- -1 Aluminum-magnesium-zinc Chemical compound 0.000 title claims abstract description 17
- 238000005452 bending Methods 0.000 claims abstract description 35
- 238000003825 pressing Methods 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 8
- 238000007747 plating Methods 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003068 static effect Effects 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- 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
- B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
- B21D47/01—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars
Abstract
The invention belongs to the field of aluminum magnesium zinc roll forming frame profile forming devices, and particularly relates to an aluminum magnesium zinc roll forming frame profile forming device which comprises a machine body, wherein a roll forming group is arranged on one side of the top of the machine body, a bending box is fixedly arranged on one side of the machine body, which is far away from the roll forming group, flat wheels are respectively arranged on the upper side and the lower side of the side wall of the bending box, which is far away from the roll forming group, the bending box and the interior of the roll forming group are slidably provided with profiles, a first hydraulic cylinder is fixedly arranged in the bending box and is positioned on one side of the profiles, a concave groove wheel is rotationally arranged at the output end of the first hydraulic cylinder to form grooves on the surfaces of the profiles, a reversing valve is fixedly arranged on one side of the first hydraulic cylinder and is connected with the exterior of the bending box through a hydraulic hose, and the reversing valve is far away from one side of the first hydraulic cylinder and is communicated with the exterior of the bending box through the hydraulic hose, so that surface plating layers can not be damaged in the whole course in the process of forming the frame profiles.
Description
Technical Field
The invention belongs to the field of aluminum-magnesium-zinc roll forming frame profile forming devices, and particularly relates to an aluminum-magnesium-zinc roll forming frame profile forming device.
Background
The aluminum-magnesium-zinc section is a novel high corrosion-resistance coating material, improves the corrosion inhibition effect, has high coating hardness and has excellent damage resistance.
When the aluminum-magnesium-zinc profile is used as a frame profile at present, the surface of a coating film can be damaged through multiple processes in the forming process, so that the corrosion resistance and the frame strength of the frame profile are reduced, and the use of the profile is affected.
Therefore, there is an urgent need for an aluminum-magnesium-zinc roll forming frame profile forming device capable of avoiding damaging the surface coating in the whole process of forming the frame profile.
Disclosure of Invention
The invention aims at solving the problems in the prior art and provides an aluminum-magnesium-zinc roll forming frame profile forming device which can not damage a surface coating in the whole process of forming a frame profile.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides an aluminium magnesium zinc roll forming frame section bar forming device, includes the organism, organism top one side is equipped with the roll extrusion group, the organism is kept away from roll extrusion group one side has set firmly the case of bending, the case of bending is kept away from both sides about roll extrusion group one side lateral wall rotate respectively and are equipped with the level and smooth wheel, the case of bending with the inside slip of roll extrusion group is equipped with the section bar, the case of bending is inside to be located section bar one side has set firmly first pneumatic cylinder, first pneumatic cylinder output rotates and is equipped with the concave groove wheel pair the section bar surface carries out the recess shaping, first pneumatic cylinder one side has set firmly the switching-over valve and is connected through hydraulic hose, the switching-over valve keep away from first pneumatic cylinder one side through hydraulic hose with the outside intercommunication of case of bending.
Preferably, the bottom of the bending box is located at the section bar, a sliding groove is fixedly formed in the section bar, a rotating shaft is arranged in the sliding groove in a sliding mode, a rotating seat is arranged on the outer portion of the rotating shaft in a rotating mode, a friction plate is fixedly arranged on one side of the rotating seat, the rotating seat is far away from the section bar, a second hydraulic cylinder is arranged on one side of the section bar, and the output end of the second hydraulic cylinder is connected with the rotating shaft in a rotating mode.
Preferably, two sliding seats are respectively and fixedly arranged on two side edges of the second hydraulic cylinder, each sliding seat is provided with a ball in a rotating mode, one end, away from the section bar, of the second hydraulic cylinder is provided with a guide wheel in a rotating mode, the bottom of the bending box is away from the direction of the first hydraulic cylinder, and the guide rail is in rolling contact with the guide wheel.
Preferably, the second hydraulic cylinder rotates towards the rolling group, a second rotating rod is arranged at one end of the second hydraulic cylinder, which is close to the second hydraulic cylinder, a first rotating rod is arranged at one end of the second hydraulic cylinder in a rotating mode, the first rotating rod is connected with the second rotating rod through a first spring, a supporting wheel is arranged at one end, away from the second rotating rod, of the first rotating rod in a rotating mode, and the supporting wheel is in rolling contact with the second hydraulic cylinder.
Preferably, a side pull rod is fixedly arranged on one side of the output end of the second hydraulic cylinder, and a bending wheel is rotatably arranged at one end, away from the second hydraulic cylinder, of the side pull rod to perform bending action.
Preferably, a push rod is fixedly arranged at the bottom of the rotating shaft, and one end, far away from the rotating shaft, of the push rod is in sliding connection with the inside of the reversing valve to control the hydraulic direction.
Preferably, the middle of the inside of the rotating seat is close to one side of the section bar and is slidably provided with a pressure pin, the pressure pin is connected with the rotating seat through a second spring, hydraulic liquid is filled in the position of the pressure pin, two sides of the position of the pressure pin are respectively slidably provided with a push rod, the push rod is far away from one end of the pressure pin and fixedly provided with a magnet, the magnet is far away from the direction of the push rod and is slidably provided with a pressing plate, the pressing plate is close to one side of the push rod and fixedly provided with a magnet, the pressing plate is close to the direction of the rotating seat and is slidably provided with a push plate, and the push plate is connected with the rotating seat through a third spring.
Advantageous effects
The invention provides a device for forming aluminum-magnesium-zinc roll forming frame section by improving, which has the following improvement and advantages compared with the prior art:
1. through setting up the recess wheel, can carry out recess shaping to the profile surface and handle, reinforcing profile compressive strength.
2. Through setting up the wheel of bending, can carry out right angle roll extrusion with the section bar under the cooperation of guide rail and buckle.
3. Through setting up the top board, can provide the external stay guide when the section bar is bent for the section bar is buckled according to the regulation position, and for the subsequent levelling round carries out the level and smooth condition that creates.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a partial cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is a partial cross-sectional view taken at B-B in FIG. 3;
FIG. 5 is a partial cross-sectional view taken at C-C of FIG. 3;
FIG. 6 is a partial enlarged view of FIG. 3 at D;
FIG. 7 is a partial cross-sectional view taken at E-E of FIG. 6;
fig. 8 is a partial cross-sectional view taken at F-F in fig. 7.
In the figure: 10. a body; 11. a bending box; 12. a leveling wheel; 13. rolling the group; 14. the method comprises the steps of carrying out a first treatment on the surface of the 15. A reversing valve; 16. a first hydraulic cylinder; 17. a groove wheel; 18. a bending wheel; 19. a section bar; 20. a second hydraulic cylinder; 21. a sliding seat; 22. a guide wheel; 23. a guide rail; 24. a support wheel; 25. a first rotating lever; 26. a second rotating rod; 27. a first spring; 28. a pressure pin; 29. a second spring; 30. a rotating seat; 31. a friction plate; 32. a rotating shaft; 33. a chute; 34. a push rod; 35. a ball; 36. a top pressing plate; 37. a magnet; 38. a push rod; 39. a third spring; 40. a push plate; 41. side tie rods.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
In the description of the present invention, it should be noted that, the azimuth or positional relationship indicated by the terms "inner", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Referring to fig. 1-8, an aluminum-magnesium-zinc roll forming frame profile forming device comprises a machine body 10, a roll forming group 13 is arranged on one side of the top of the machine body 10, a bending box 11 is fixedly arranged on one side of the machine body 10, far away from the roll forming group 13, leveling wheels 12 are respectively arranged on the upper side and the lower side of the side wall of the roll forming group 13 in a rotating mode, the bending box 11 is provided with a profile 19 in a sliding mode, a first hydraulic cylinder 16 is fixedly arranged on one side, located inside the profile 19, of the bending box 11, a groove wheel 17 is rotatably arranged at the output end of the first hydraulic cylinder 16 to form grooves on the surface of the profile 19, a reversing valve 15 is fixedly arranged on one side of the first hydraulic cylinder 16 and is connected through a hydraulic hose, and one side of the reversing valve 15, far away from the first hydraulic cylinder 16, is communicated with the outside of the bending box 11 through the hydraulic hose.
Further, a chute 33 is fixedly arranged at the bottom of the bending box 11 and located at the section bar 19, a rotating shaft 32 is slidably arranged in the chute 33, a rotating seat 30 is rotatably sleeved outside the rotating shaft 32, a friction plate 31 is fixedly arranged on one side, close to the section bar 19, of the rotating seat 30, a second hydraulic cylinder 20 is arranged on one side, far away from the section bar 19, of the rotating seat 30, and the output end of the second hydraulic cylinder 20 is rotatably connected with the rotating shaft 32.
Further, two sliding seats 21 are respectively and fixedly arranged on two side edges of the second hydraulic cylinder 20, a ball 35 is rotatably arranged on each sliding seat 21, a guide wheel 22 is rotatably arranged at one end, far away from the section bar 19, of the second hydraulic cylinder 20, a guide rail 23 is fixedly arranged at the bottom of the bending box 11 in the direction far away from the first hydraulic cylinder 16, and the guide rail 23 is in rolling contact with the guide wheel 22.
Further, the second hydraulic cylinder 20 is rotatably provided with a second rotating rod 26 facing the rolling group 13, one end of the second rotating rod 26, which is close to the second hydraulic cylinder 20, is rotatably provided with a first rotating rod 25, the first rotating rod 25 is connected with the second rotating rod 26 through a first spring 27, one end of the first rotating rod 25, which is far away from the second rotating rod 26, is rotatably provided with a supporting wheel 24, and the supporting wheel 24 is in rolling contact with the second hydraulic cylinder 20.
Further, a side pull rod 41 is fixedly arranged at one side of the output end of the second hydraulic cylinder 20, and a bending wheel 18 is rotatably arranged at one end, away from the second hydraulic cylinder 20, of the side pull rod 41 to perform bending operation.
Further, a push rod 34 is fixedly arranged at the bottom of the rotating shaft 32, and one end, far away from the rotating shaft 32, of the push rod 34 is in sliding connection with the inside of the reversing valve 15 to control the hydraulic direction.
Further, a pressure pin 28 is slidably arranged on one side, close to the section bar 19, of the middle inside the rotating seat 30, the pressure pin 28 is connected with the rotating seat 30 through a second spring 29, hydraulic fluid is filled in the pressure pin 28, ejector rods 38 are slidably arranged on the upper side and the lower side of the pressure pin 28, a magnet 37 is fixedly arranged at one end, far away from the pressure pin 28, of the ejector rods 38, a pressing plate 36 is slidably arranged in the direction, far away from the ejector rods 38, of the magnet 37, a magnet 37 is fixedly arranged on one side, close to the ejector rods 38, of the pressing plate 36, a push plate 40 is slidably arranged in the direction, close to the rotating seat 30, of the pressing plate 40, and the rotating seat 30 is connected through a third spring 39.
Principle of operation
When the aluminum-magnesium-zinc roll forming frame profile forming device starts to start under the static state, the roll forming group 13 starts, a material plate is placed into the roll forming group 13 for preliminary roll forming, the preliminarily formed profile 19 enters the bending box 11, and the profile 19 contacts the groove wheel 17 and is extruded out of the groove to further increase the strength of the profile.
After the profile 19 moves for a set length, the second hydraulic cylinder 20 is started, the output end of the second hydraulic cylinder 20 drives the rotating seat 30 to move towards the direction of the profile 19, the rotating shaft 32 drives the push rod 34 to move so as to change the direction of hydraulic fluid in the reversing valve 15, the first hydraulic cylinder 16 starts to drive the grooved pulley 17 to move and separate from the profile 19, meanwhile, the rotating seat 30 contacts the profile 19, the friction plate 31 contacts the profile 19 to prevent relative sliding, the pressure pin 28 is extruded to move towards the direction of the second spring 29, the hydraulic fluid ejects out the push rods 38 at two sides, the push rods 38 push the push plate 36 to move, and the tip of the push plate 36 struts the upper side and the lower side of the profile 19. Simultaneously, the second hydraulic cylinder 20 continues to stretch, the cylinder body of the second hydraulic cylinder 20 rotates around the rotating seat 30 under the action of the guide wheel 22 and the guide rail 23, the bending wheel 18 contacts the section bar 19 and gradually bends the section bar 19, the upper side and the lower side of the bending position of the section bar 19 are folded under the support guide of the top pressing plate 36, and simultaneously, the bending position of the upper side and the lower side of the section bar 19 drives the top pressing plate 36 to move, and the top pressing plate 36 contacts the push plate 40 and pushes the push plate 40 to move.
When the section bar 19 is bent at right angles, the rolling group 13 continues to drive the section bar 19 to move, meanwhile, the second hydraulic cylinder 20 contracts, the pressure pin 28 resets under the action of the second spring 29, the rotating seat 30 is separated from contact with the section bar 19, the ejector rod 38 resets, the top pressing plate 36 is separated from contact with the section bar 19, the push plate 40 moves under the action of the third spring 39 and pushes the top pressing plate 36 to move to the ejector rod 38, and the top pressing plate 36 moves towards and contacts the ejector rod 38 under the action of the magnet 37. Simultaneously, the second rotating rod 26 and the first rotating rod 25 are unfolded and reset under the action of the first spring 27, the supporting wheel 24 pushes the second hydraulic cylinder 20 to reset, and the balls 35 roll at the bottom of the bending box 11 to reduce friction.
At this time, the profile 19 continues to move, the protruded folds at the upper side and the lower side of the profile 19 contact the leveling wheel 12, the folds are rolled and attached to the side surfaces of the profile 19 under the action of the leveling wheel 12, the profile 19 is folded at a right angle once to form a frame, the profile 19 has no process of damaging surface plating layers, such as cutting and the like, in the whole process of processing and forming, and the corrosion resistance and strength of the frame profile are ensured.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the invention.
Claims (3)
1. The utility model provides an aluminium magnesium zinc roll forming frame section bar forming device, includes organism (10), its characterized in that, organism (10) top one side is equipped with roll extrusion group (13), organism (10) are kept away from roll extrusion group (13) one side has set firmly bend case (11), bend case (11) keep away from roll extrusion group (13) one side lateral wall upper and lower both sides rotate respectively and are equipped with leveling wheel (12), bend case (11) with roll extrusion group (13) inside slip is equipped with section bar (19), bend case (11) inside be located section bar (19) one side has set firmly first pneumatic cylinder (16), first pneumatic cylinder (16) output rotates and is equipped with concave groove wheel (17) to section bar (19) surface carries out the recess shaping, first pneumatic cylinder (16) one side has set firmly reversing valve (15) and is connected through hydraulic hose, reversing valve (15) keep away from first pneumatic cylinder (16) one side with bend case (11) outside intercommunication through hydraulic hose;
the bottom of the bending box (11) is positioned at the section bar (19) and fixedly provided with a chute (33), a rotating shaft (32) is arranged in the chute (33) in a sliding way, a rotating seat (30) is sleeved outside the rotating shaft (32) in a rotating way, a friction plate (31) is fixedly arranged on one side, close to the section bar (19), of the rotating seat (30), a second hydraulic cylinder (20) is arranged on one side, far away from the section bar (19), of the rotating seat (30), and the output end of the second hydraulic cylinder (20) is in rotating connection with the rotating shaft (32);
two sliding seats (21) are respectively and fixedly arranged on two side edges of the second hydraulic cylinder (20), a ball (35) is rotationally arranged on each sliding seat (21), a guide wheel (22) is rotationally arranged at one end, far away from the section bar (19), of the second hydraulic cylinder (20), a guide rail (23) is fixedly arranged at the bottom of the bending box (11) in the direction, far away from the first hydraulic cylinder (16), and the guide rail (23) is in rolling contact with the guide wheel (22);
a side pull rod (41) is fixedly arranged at one side of the output end of the second hydraulic cylinder (20), and a bending wheel (18) is rotatably arranged at one end, far away from the second hydraulic cylinder (20), of the side pull rod (41) to perform bending action;
the bottom of the rotating shaft (32) is fixedly provided with a push rod (34), and one end, far away from the rotating shaft (32), of the push rod (34) is in sliding connection with the inside of the reversing valve (15) to control the hydraulic direction.
2. The aluminum-magnesium-zinc roll forming frame profile forming device according to claim 1, wherein a second rotating rod (26) is rotatably arranged on the second hydraulic cylinder (20) facing the direction of the roll forming group (13), a first rotating rod (25) is rotatably arranged on one end, close to the second hydraulic cylinder (20), of the second rotating rod (26), the first rotating rod (25) is connected with the second rotating rod (26) through a first spring (27), a supporting wheel (24) is rotatably arranged on one end, away from the second rotating rod (26), of the first rotating rod (25), and the supporting wheel (24) is in rolling contact with the second hydraulic cylinder (20).
3. The aluminum-magnesium-zinc roll forming frame profile forming device according to claim 1, wherein a pressure pin (28) is slidably arranged in the middle of the inside of the rotating seat (30) and close to one side of the profile (19), the pressure pin (28) is connected with the rotating seat (30) through a second spring (29), hydraulic fluid is filled in the position of the pressure pin (28), ejector rods (38) are slidably arranged on the upper side and the lower side of the position of the pressure pin (28) respectively, a magnet (37) is fixedly arranged at one end of the ejector rod (38) away from the pressure pin (28), a pressing plate (36) is slidably arranged at the position, close to one side of the ejector rod (38), of the pressing plate (36), a push plate (40) is slidably arranged at the position, close to the rotating seat (30), of the pressing plate (36), and the pressing plate (40) is connected with the rotating seat (30) through a third spring (39).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210532809.3A CN114749556B (en) | 2022-05-17 | 2022-05-17 | Aluminum-magnesium-zinc roll forming frame profile forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210532809.3A CN114749556B (en) | 2022-05-17 | 2022-05-17 | Aluminum-magnesium-zinc roll forming frame profile forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114749556A CN114749556A (en) | 2022-07-15 |
| CN114749556B true CN114749556B (en) | 2024-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210532809.3A Active CN114749556B (en) | 2022-05-17 | 2022-05-17 | Aluminum-magnesium-zinc roll forming frame profile forming device |
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| Country | Link |
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| CN (1) | CN114749556B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102847764A (en) * | 2011-06-28 | 2013-01-02 | 第一高周波工业株式会社 | Bending processing device for metal tube |
| JP2013107117A (en) * | 2011-11-22 | 2013-06-06 | Kobe Steel Ltd | Bending method of hollow extruded shape made of aluminum alloy, hollow extruded shape made of aluminum alloy using the method, method for manufacturing battery frame for automobile, battery frame for automobile, method for manufacturing frame structure of seat, and frame structure of seat |
| WO2014020741A1 (en) * | 2012-08-02 | 2014-02-06 | 日軽金アクト株式会社 | Manufacturing method for curved members and bending devices |
| CN105377461A (en) * | 2013-05-20 | 2016-03-02 | Mep意大利美普机械制造有限公司 | Machine for bending metal products and corresponding bending method |
| CN208033418U (en) * | 2018-01-04 | 2018-11-02 | 广州贝友特机械设备有限公司 | A kind of arc making punching bending integral machine |
-
2022
- 2022-05-17 CN CN202210532809.3A patent/CN114749556B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102847764A (en) * | 2011-06-28 | 2013-01-02 | 第一高周波工业株式会社 | Bending processing device for metal tube |
| JP2013107117A (en) * | 2011-11-22 | 2013-06-06 | Kobe Steel Ltd | Bending method of hollow extruded shape made of aluminum alloy, hollow extruded shape made of aluminum alloy using the method, method for manufacturing battery frame for automobile, battery frame for automobile, method for manufacturing frame structure of seat, and frame structure of seat |
| WO2014020741A1 (en) * | 2012-08-02 | 2014-02-06 | 日軽金アクト株式会社 | Manufacturing method for curved members and bending devices |
| CN105377461A (en) * | 2013-05-20 | 2016-03-02 | Mep意大利美普机械制造有限公司 | Machine for bending metal products and corresponding bending method |
| CN208033418U (en) * | 2018-01-04 | 2018-11-02 | 广州贝友特机械设备有限公司 | A kind of arc making punching bending integral machine |
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| Publication number | Publication date |
|---|---|
| CN114749556A (en) | 2022-07-15 |
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