CN108145031B - Forming tool and process method for three-dimensional curved beam of aluminum profile - Google Patents
Forming tool and process method for three-dimensional curved beam of aluminum profile Download PDFInfo
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- CN108145031B CN108145031B CN201810088500.3A CN201810088500A CN108145031B CN 108145031 B CN108145031 B CN 108145031B CN 201810088500 A CN201810088500 A CN 201810088500A CN 108145031 B CN108145031 B CN 108145031B
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000000712 assembly Effects 0.000 claims abstract description 6
- 238000000429 assembly Methods 0.000 claims abstract description 6
- 238000005452 bending Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013585 weight reducing agent 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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a forming tool and a process method of an aluminum profile three-dimensional bent beam, wherein the forming tool has high automation degree, reduces the working strength of operators and improves the product quality and the production efficiency; the female die is fixed on the tool mounting platform; the male die is movably connected to the tool mounting platform; the two groups of stretching assemblies are symmetrically arranged at two ends of the tool through a stretching assembly mounting table, and the two groups of stretching assemblies are respectively used for fixing two ends of a workpiece; the stretching assembly applies a stretching force and a torsion force to the workpiece. The forming tool and the process method for the three-dimensional curved beam of the aluminum profile realize the automatic production of asymmetric three-dimensional forming of the longer aluminum profile, greatly lighten the working strength of the pressure regulating type of an operation worker, and improve the production efficiency and the finished product quality.
Description
Technical Field
The invention relates to the technical field of processing of streamline workpieces of motor train units, in particular to a forming tool and a forming process method of a long asymmetric three-dimensional aluminum profile bent beam at the top of a streamline head of a motor train unit.
Background
In recent years, with the development of the railway passenger car industry, the requirements for the appearance design of the passenger car and the weight reduction of the whole car are continuously improved. The aluminum profile is widely applied to the body structures of rail coaches such as high-speed motor train units due to the characteristics of light weight, easy molding and the like, and the streamline headstock of the high-speed motor train unit also needs the molding and welding of a large-sized three-dimensional aluminum profile, so that the three-dimensional molding process of the aluminum profile becomes the research direction of the industry.
In the parts formed by streamline heads, the forming process of the long aluminum profile three-dimensional asymmetric bent beam (with the length of 8 meters) becomes an industry difficulty, and most of the three-dimensional aluminum profile bent beam large-length parts at the present stage adopt a process of welding after sectional forming, so that the integral strength of the bent beam is reduced, and the welding process is increased. Meanwhile, the large-sized aluminum profile three-dimensional bent beam forming die is less in frequency, and no mature theory or experience is used for supporting.
Disclosure of Invention
The invention aims to provide a forming tool and a process method for an aluminum profile three-dimensional bent beam, which have high automation degree, reduce the working strength of operators and improve the product quality and the production efficiency.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention discloses a forming tool of an aluminum profile three-dimensional bent beam, which mainly comprises the following components:
a tool mounting platform;
the female die is fixed on the tool mounting platform;
the male die is movably connected to the tool mounting platform;
the two groups of stretching assemblies are symmetrically arranged at two ends of the tool through a stretching assembly mounting table, and the two groups of stretching assemblies are respectively used for fixing two ends of a workpiece;
the stretching assembly applies a stretching force and a torsion force to the workpiece;
during processing, the workpiece is attached to the female die and the male die.
Further, the stretching assembly comprises a stretching machine mounting plate movably connected to the inner side surface of the stretching assembly mounting table and a stretching machine fixedly connected to the stretching machine mounting plate, the output end of the stretching machine is provided with a clamp, and the stretching machine clamps the end part of the workpiece through the clamp.
Furthermore, the inner side surface of the stretching assembly mounting table is provided with two slide ways, namely a transverse slide way and a longitudinal slide way;
the stretcher mounting plate drives the stretcher to slide along any slide way and is fixed at any position of the slide way.
Furthermore, a male die sliding rail extending along the width direction of the tool mounting platform is arranged on the contact surface of the male die and the tool mounting platform, a male die hydraulic cylinder assembly is arranged on the side surface of the male die, and the male die hydraulic cylinder assembly is fixedly connected to the tool mounting platform and pushes the male die to move along the male die sliding rail.
Furthermore, the male die hydraulic cylinder assembly comprises three groups of male die hydraulic cylinders which are uniformly distributed on the side face of the male die, and the output end of each male die hydraulic cylinder is fixedly connected with the side face of the male die.
Furthermore, three groups of male die hydraulic cylinders adopt a synchronous design loop to realize synchronous action.
Further, the clamp is a hydraulic chuck.
Further, the tool mounting platform is connected with the working platform of the stretcher through the ground feet.
Further, the female die is a female die made of plastic-wood composite materials.
The invention discloses a forming process method of an aluminum profile three-dimensional bent beam, which comprises the following steps:
s1, detecting and selecting a workpiece: the relative position of the tool and the stretcher is adjusted, the hardness of the workpiece is detected, and the workpiece with the hardness meeting the requirement is selected;
s2, positioning a workpiece: clamping the two ends of the qualified workpiece by using clamps, and ensuring enough clamping force;
s3, two-dimensional bending forming of the workpiece: starting a stretcher, stretching the workpiece obliquely downwards by clinging to the shape of the female die, and completing two-dimensional bending forming of the workpiece;
s4, one-time three-dimensional forming of the workpiece: starting a hydraulic cylinder of the clamp to output torsion action, so that the workpiece is attached to the torsion curved surface of the female die, and completing one-time three-dimensional forming of the workpiece;
s5, secondary three-dimensional forming of the workpiece: after the workpiece is completely attached to the female die, starting a male die hydraulic cylinder to push the male die to slide on a male die sliding rail, completing die assembly of the male die and the female die, and performing bending forming on the workpiece to complete secondary three-dimensional forming of the workpiece;
s6, molding and holding: keeping the torsion force of the stretcher unchanged, and increasing and adjusting the parameters of the stretching force for 3-5 minutes;
s7, resetting: and returning all the hydraulic cylinders, taking down the molded workpiece, cutting the lengthened section, and detecting.
In the technical scheme, the forming tool and the process method for the aluminum profile three-dimensional bent beam realize the automatic production of asymmetric three-dimensional forming of longer aluminum profiles, greatly reduce the working strength of pressure regulating type of operation workers, and improve the production efficiency and the finished product quality;
secondly, the product quality is ensured, welded joints are avoided, and the overall strength of the product is improved;
finally, in industries such as railway coaches and aviation, a technical scheme for solving the three-dimensional asymmetric molding of the aluminum profile with the irregular cross section is provided, and a substantial breakthrough is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a forming tool for an aluminum profile three-dimensional curved beam, which is disclosed by the embodiment of the invention;
fig. 2 is an enlarged schematic diagram of a forming tool for an aluminum profile three-dimensional curved beam, which is disclosed by the embodiment of the invention.
Reference numerals illustrate:
1. a workpiece; 2. a female die; 3. a male die; 4. a male die hydraulic cylinder; 5. a tool mounting platform; 6. a clamp; 7. a stretching assembly mounting table; 8. a stretcher; 9. a male die slide rail; 10. a transverse slideway; 11. a longitudinal slideway; 12. a foot margin; 13. a stretcher mounting plate.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
See fig. 1-2;
the invention relates to a forming tool of an aluminum profile three-dimensional curved beam, which mainly comprises the following components:
a tool mounting platform 5;
the female die 2 is fixed on the tool mounting platform 5;
the male die 3 is movably connected to the tool mounting platform 5;
the two groups of stretching components are symmetrically arranged at two ends of the tool through the stretching component mounting tables 7, and the two groups of stretching components are respectively fixed at two ends of the workpiece 1;
the stretching assembly applies a stretching force and a torsion force to the workpiece 1;
during processing, the workpiece 1 is attached to the female die 2 and the male die 3.
Specifically, this embodiment discloses a degree of automation is high, shaping effectual shaping frock of aluminium alloy (work piece 1) three-dimensional curved beam, and it mainly includes frock mounting platform 5 and punch 3 and die 2, other subassembly on this frock mounting platform 5. Wherein, the tensile force and the torsional force can be applied to the workpiece 1 by the tensile assembly. The stretching assembly comprises a stretching machine mounting plate 13 movably connected to the inner side surface of the stretching assembly mounting table 7 and a stretching machine 8 fixedly connected to the stretching machine mounting plate 13, wherein a clamp is arranged at the output end of the stretching machine 8, and the stretching machine 8 clamps the end part of the workpiece 1 through the clamp 6. Since the stretcher 8 applies a large force during operation, in order to prevent the workpiece 1 from falling off and to improve the product quality, it is necessary to ensure that the clamp 6 has a large clamping force. In addition, in this embodiment, the inner side surface of the stretching assembly mounting table 7 is provided with two sliding ways, namely a transverse sliding way 10 and a longitudinal sliding way 11; the stretcher mounting plate 13 drives the stretcher 8 to slide along any slideway and be fixed at any position of the slideway. The slide is also designed to allow movement during processing.
Preferably, in this embodiment, a contact surface between the male die 3 and the tool mounting platform 5 is provided with a male die sliding rail 9 extending along the width direction of the tool mounting platform 5, and a male die hydraulic cylinder assembly is provided on a side surface of the male die 3 and fixedly connected to the tool mounting platform 5 and pushes the male die 3 to move along the male die sliding rail 9. The male die hydraulic cylinder assembly of the embodiment comprises three groups of male die hydraulic cylinders 4 uniformly distributed on the side face of the male die 3, and the output end of each male die hydraulic cylinder 4 is fixedly connected with the side face of the male die 3. In the last process, after the workpiece 1 finishes stretching operation, the clamp 6 twists the workpiece 1 under the rotation effect, and after the workpiece 1 and the female die 2 are completely attached, the male die hydraulic cylinder 4 starts to work, so that the male die 3 is pushed to move along the male die sliding rail 9, and the final bending is performed. In order to ensure that the die 3 and the die 2 have uniform die closing time gaps, three groups of die hydraulic cylinders 4 need to be ensured to adopt synchronous design loops to realize synchronous actions.
Preferably, in order to enable the clamp 6 to perform a twisting operation, the clamp 6 is a hydraulic chuck in this embodiment.
In order to improve the stability of the tooling installation platform 5, in this embodiment, the tooling installation platform 5 is connected with the stretcher working platform through the anchor 12.
Because the die 2 of this frock is great in volume, can reach under the prerequisite of operation requirement, the die 2 of this embodiment is the plastic-wood composite material die, so both can lighten frock weight, save material cost, also reducible processing degree of difficulty, practice thrift processing cost, energy-concerving and environment-protective.
The invention discloses a forming process method of an aluminum profile three-dimensional bent beam, which comprises the following steps:
s1, detecting and selecting a workpiece 1: the relative position of the tool and the stretcher 8 is adjusted, the hardness of the workpiece 1 is detected, and the workpiece 1 with the hardness meeting the requirement is selected;
s2, positioning the workpiece 1: clamping the two ends of the qualified workpiece 1 by using a clamp 6, and ensuring enough clamping force;
s3, two-dimensional bending forming of the workpiece 1: starting a stretcher 8, stretching the workpiece 1 obliquely downwards by clinging to the shape of the female die 2, and completing two-dimensional bending forming of the workpiece 1;
s4, one-time three-dimensional forming of the workpiece 1: starting a hydraulic cylinder of the clamp 6 to output torsion action, so that the workpiece 1 is attached to the torsion curved surface of the female die 2, and finishing one-time three-dimensional forming of the workpiece 1;
s5, secondary three-dimensional forming of the workpiece 1: after the workpiece 1 is completely attached to the female die 2, starting a male die hydraulic cylinder 4 to push the male die 3 to slide on a male die sliding rail 9, closing the dies of the male die 3 and the female die 2, and performing press bending forming on the workpiece 1 to finish secondary three-dimensional forming of the workpiece 1;
s6, molding and holding: the torsion force of the stretcher 8 is kept unchanged, the parameters of the stretching force are increased and adjusted, and the stretching force is kept for 3-5 minutes;
s7, resetting: and returning all the hydraulic cylinders, taking down the molded workpiece 1, cutting out the lengthened section, and detecting.
In the technical scheme, the forming tool and the process method for the aluminum profile three-dimensional bent beam realize the automatic production of asymmetric three-dimensional forming of longer aluminum profiles, greatly reduce the working strength of pressure regulating type of operation workers, and improve the production efficiency and the finished product quality;
secondly, the product quality is ensured, welded joints are avoided, and the overall strength of the product is improved;
finally, in industries such as railway coaches and aviation, a technical scheme for solving the three-dimensional asymmetric molding of the aluminum profile with the irregular cross section is provided, and a substantial breakthrough is achieved.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (6)
1. Shaping frock of three-dimensional curved beam of aluminium alloy, its characterized in that mainly includes:
a tool mounting platform (5);
the female die (2) is fixed on the tool mounting platform (5);
the male die (3) is movably connected to the tool mounting platform (5);
the two groups of stretching assemblies are symmetrically arranged at two ends of the tool through stretching assembly mounting tables (7), and the two groups of stretching assemblies are respectively used for fixing two ends of a workpiece (1);
the stretching assembly applies a stretching force and a torsion force to the workpiece (1);
during processing, the workpiece (1) is attached to the female die (2) and the male die (3);
the stretching assembly comprises a stretching machine mounting disc (13) movably connected to the inner side surface of the stretching assembly mounting table (7) and a stretching machine (8) fixedly connected to the stretching machine mounting disc (13), the output end of the stretching machine (8) is provided with a clamp (6), and the stretching machine (8) clamps the end part of the workpiece (1) through the clamp (6);
the inner side surface of the stretching assembly mounting table (7) is provided with two slide ways, namely a transverse slide way (10) and a longitudinal slide way (11);
the stretcher mounting plate (13) drives the stretcher (8) to slide along any slideway and be fixed at any position of the slideway;
a male die sliding rail (9) extending along the width direction of the tool mounting platform (5) is arranged on the contact surface of the male die (3) and the tool mounting platform (5), a male die hydraulic cylinder assembly is arranged on the side surface of the male die (3), and is fixedly connected to the tool mounting platform (5) and pushes the male die (3) to move along the male die sliding rail (9);
the male die hydraulic cylinder assembly comprises three groups of male die hydraulic cylinders (4) which are uniformly distributed on the side face of the male die (3), and the output end of each male die hydraulic cylinder (4) is fixedly connected with the side face of the male die (3).
2. The tool for forming the three-dimensional curved beam of the aluminum profile according to claim 1, wherein three groups of male die hydraulic cylinders (4) realize synchronous actions by adopting a synchronous design loop.
3. The tooling for forming the three-dimensional curved beam of the aluminum profile according to claim 1, wherein the clamp (6) is a hydraulic chuck.
4. The tooling for forming the three-dimensional curved beam of the aluminum profile according to claim 1, wherein the periphery of the tooling mounting platform (5) is provided with a foundation (12) connected with a workbench of a stretcher.
5. The tooling for forming the three-dimensional curved beam of the aluminum profile according to claim 1, wherein the female die (2) is a female die made of plastic-wood composite materials.
6. The forming process method of the three-dimensional curved beam of the aluminum profile is characterized by comprising the following steps of:
s1, detecting and selecting a workpiece (1): the relative positions of the tool and the stretcher (8) are adjusted, the hardness of the workpiece (1) is detected, and the workpiece (1) with the hardness meeting the requirement is selected;
s2, positioning a workpiece (1): clamping the two ends of the qualified workpiece (1) by using clamps (6), and ensuring enough clamping force;
s3, two-dimensional bending forming of the workpiece (1): starting a stretcher (8), tightly attaching the workpiece (1) to the shape of the female die (2), stretching the workpiece obliquely downwards, and completing two-dimensional bending forming of the workpiece (1);
s4, one-time three-dimensional forming of the workpiece (1): starting a hydraulic cylinder of the clamp (6) to output torsion action, so that the workpiece (1) is attached to the torsion curved surface of the female die (2), and completing one-time three-dimensional forming of the workpiece (1);
s5, secondary three-dimensional forming of the workpiece (1): after the workpiece (1) is completely attached to the female die (2), starting a male die hydraulic cylinder (4) to push the male die (3) to slide on a male die sliding rail (9), closing the die by the male die (3) and the female die (2), and performing press bending forming on the workpiece (1) to finish secondary three-dimensional forming of the workpiece (1);
s6, molding and holding: keeping the torsion force of the stretcher (8) unchanged, increasing and adjusting the parameters of the stretching force, and keeping for 3-5 minutes;
s7, resetting: and returning all the hydraulic cylinders, taking down the molded workpiece (1), cutting off the lengthened section, and detecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810088500.3A CN108145031B (en) | 2018-01-30 | 2018-01-30 | Forming tool and process method for three-dimensional curved beam of aluminum profile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810088500.3A CN108145031B (en) | 2018-01-30 | 2018-01-30 | Forming tool and process method for three-dimensional curved beam of aluminum profile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108145031A CN108145031A (en) | 2018-06-12 |
| CN108145031B true CN108145031B (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810088500.3A Active CN108145031B (en) | 2018-01-30 | 2018-01-30 | Forming tool and process method for three-dimensional curved beam of aluminum profile |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054918A (en) * | 1991-04-12 | 1991-10-02 | 秦皇岛经济技术开发区科技开发总公司 | Three dimensional bending machine for automobile door and window frames |
| JPH08132142A (en) * | 1994-11-02 | 1996-05-28 | Aisin Keikinzoku Kk | Bending forming device |
| CN2269911Y (en) * | 1995-06-24 | 1997-12-10 | 东北重型机械学院南校 | Section 3-D bending machine of vertical and horizontal composite shaping |
| JP2000237825A (en) * | 1999-02-17 | 2000-09-05 | Shinpo Kogyo:Kk | Stretch bender with automatic setting machine for tensile force |
| CN101628309A (en) * | 2008-07-15 | 2010-01-20 | 上海德真工贸有限公司 | Processing technique for right-upper bracket of cross beam of automotive instrument panel framework |
| CN102151728A (en) * | 2011-05-09 | 2011-08-17 | 江苏同力机械有限公司 | Cold bending forming process for camber beam of car body of passenger car |
| CN204503909U (en) * | 2015-01-30 | 2015-07-29 | 长春市恒丰客车装备有限公司 | Digitally controlled multifunctional metal stretching machine |
| CN105598227A (en) * | 2016-03-29 | 2016-05-25 | 王志中 | Integrated draw bender |
| CN105983607A (en) * | 2015-01-30 | 2016-10-05 | 长春市恒丰客车装备有限公司 | Numerical-control multifunctional metal stretching and drawing machine |
| CN106270155A (en) * | 2016-09-29 | 2017-01-04 | 天津天锻航空科技有限公司 | Convex-concave multi-curvature class aircraft skin product shaping frock and combined forming process |
| CN207787550U (en) * | 2018-01-30 | 2018-08-31 | 长春城际轨道客车配件有限公司 | The forming frock of aluminium section bar three-dimensional camber beam |
-
2018
- 2018-01-30 CN CN201810088500.3A patent/CN108145031B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054918A (en) * | 1991-04-12 | 1991-10-02 | 秦皇岛经济技术开发区科技开发总公司 | Three dimensional bending machine for automobile door and window frames |
| JPH08132142A (en) * | 1994-11-02 | 1996-05-28 | Aisin Keikinzoku Kk | Bending forming device |
| CN2269911Y (en) * | 1995-06-24 | 1997-12-10 | 东北重型机械学院南校 | Section 3-D bending machine of vertical and horizontal composite shaping |
| JP2000237825A (en) * | 1999-02-17 | 2000-09-05 | Shinpo Kogyo:Kk | Stretch bender with automatic setting machine for tensile force |
| CN101628309A (en) * | 2008-07-15 | 2010-01-20 | 上海德真工贸有限公司 | Processing technique for right-upper bracket of cross beam of automotive instrument panel framework |
| CN102151728A (en) * | 2011-05-09 | 2011-08-17 | 江苏同力机械有限公司 | Cold bending forming process for camber beam of car body of passenger car |
| CN204503909U (en) * | 2015-01-30 | 2015-07-29 | 长春市恒丰客车装备有限公司 | Digitally controlled multifunctional metal stretching machine |
| CN105983607A (en) * | 2015-01-30 | 2016-10-05 | 长春市恒丰客车装备有限公司 | Numerical-control multifunctional metal stretching and drawing machine |
| CN105598227A (en) * | 2016-03-29 | 2016-05-25 | 王志中 | Integrated draw bender |
| CN106270155A (en) * | 2016-09-29 | 2017-01-04 | 天津天锻航空科技有限公司 | Convex-concave multi-curvature class aircraft skin product shaping frock and combined forming process |
| CN207787550U (en) * | 2018-01-30 | 2018-08-31 | 长春城际轨道客车配件有限公司 | The forming frock of aluminium section bar three-dimensional camber beam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108145031A (en) | 2018-06-12 |
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