CN102728744A - Forming method of car rear cover elbow and positioning fixture special for welding - Google Patents
Forming method of car rear cover elbow and positioning fixture special for welding Download PDFInfo
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- CN102728744A CN102728744A CN2012102292645A CN201210229264A CN102728744A CN 102728744 A CN102728744 A CN 102728744A CN 2012102292645 A CN2012102292645 A CN 2012102292645A CN 201210229264 A CN201210229264 A CN 201210229264A CN 102728744 A CN102728744 A CN 102728744A
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- bending
- bend pipe
- automobile bonnet
- positioning component
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Abstract
The invention discloses a forming method of a car rear cover elbow and a positioning fixture special for welding. The method comprises the steps of unfolding, shaping, U-shaped bending, cutting and so on, wherein in view that the raw material of the car rear cover elbow is a square sectional material and belongs to long and thin strip-shaped raw material, the raw material cannot be pressed by adopting the traditional stamping die forming method as the edge-pressing force is excessively small. However, by adopting the forming method disclosed by the invention, sufficient edge-pressing force is provided, simple mold is utilized to form the product; and the traditional idea that the bending is formed from inside to outside during the normal stamping and forming process is changed according to the characteristic that the size precision requirement of the car rear cover elbow is low; according to the method, bending from outside to inside is adopted, so as to avoid the problem of bending avoiding, simplify the structure of the mold, save production cost and satisfy requirement that the mold shape needs to be changed continuously during the development of the car rear cover elbow.
Description
Technical field
The invention belongs to auto parts shaping field, specifically just relate to a kind of automobile bonnet bending tube forming method and welding special fixture.
Background technology
In recent years, along with China's rapid economy development, fast-developing track has been reached in the auto industry of China, especially car industry, and car progresses in huge numbers of families the general common people's the family, becomes the vehicles that people often use in the daily life.In order to satisfy the thriving demand of car; Each big automobile production producer constantly enlarges the production output of car; Continue to release various car brands, generally all take material behavior and shape facility for various automobile metal structural members traditionally, according to the requirement establishment Sheet Metal Forming Technology of forming materials according to the automobile metal structural member; Make the hardware stamping mould according to Sheet Metal Forming Technology, on mould, raw material are shaped to obtain required automobile metal structural member.
It is automobile bonnet bend pipe that a kind of part is arranged in the automobile metal structural member, and it is that cubic steel pipe section bar with hollow is made, and comprises bending and the bigger bending shape of angle that radius is bigger in its shape and structure.At present, a lot of automobile vendors all adopt large-scale automated production equipment to produce automobile bonnet bend pipe in order to enhance productivity; But an automation equipment cost is very high, and in the automobile R&D process, the shape of various parts is uncertain; Yet automation equipment all is to carry out work according to being scheduled to good program in advance; The cost of change is higher, so it is with high costs to adopt automation equipment to make automobile bonnet bend pipe in the test manufacture stage, is unfavorable for the carrying out that produces.
Summary of the invention
In the small batch production process to above-mentioned automobile bonnet bend pipe; Utilize the automation equipment cost higher, can't adapt to the characteristics that the development needs are constantly revised product design, the automobile bonnet bending tube forming method of the present invention's design; With bending mould innermost crooked making the in the automobile bonnet bend pipe is shaped earlier; And then the bending shape in the outside is carried out bending and molding processing with Bending Mould, and obtaining required shape of product at last, this hardware stamping mould that utilizes can be changed mould fast according to the material behavior and the way of shape facility making automobile bonnet bend pipe; Satisfy in the automobile bonnet bend pipe small lot research and development production process; Need the constantly requirement of change product design, low price, simple in structure.Technical scheme
In order to realize above-mentioned technical purpose, the present invention works out a kind of automobile bonnet bending tube forming method, it is characterized in that it comprises following step:
(I) at first with square cutting of material, promptly calculate raw-material development size, will calculate and carry out the blanking operation after the gained development size compensates, obtain the required square profile size that is shaped according to product size;
(II) then carry out the bending first time according to the position of bending for the first time in the development size, in the process of bending for the first time, the doubling bending angle compensates;
(III) continue to the first time bending angle carry out shaping according to product net shape size;
(IV) then product is carried out the U-shaped bending;
(V) then the product through the U-shaped bending is carried out shaping according to product net shape size;
(VI) termination cuts off, and guarantees that product two ends length dimension meets the requirements.
Bending angle compensation value is 2 degree in the said step (II).
Behind the above-mentioned automobile bonnet bending tube forming, also need carry out the annex weld job, present weld job is on automated machine tool, to carry out; The annex welding position is fixed, and the debugging maintenance difficult is unfavorable for small lot test manufacture operation; In order to solve this attachment technique difficult problem; The present invention designs a kind of automobile bonnet bend pipe welding special positioning fixture, and it is characterized in that: it comprises pedestal, and the benchmark positioning component is contained in the pedestal upper surface left side; The first cylinder positioning seat and the second cylinder positioning seat lay respectively at pedestal upper surface front and back two side positions; The Elastic Sliding positioning component is positioned at the pedestal upper surface right positions, and spacing positioning component is between position, pedestal upper surface lower right side second cylinder positioning seat and Elastic Sliding positioning component, and the guide-localization assembly is between pedestal upper surface upper right side first cylinder positioning seat and Elastic Sliding positioning component.
Relative position between said benchmark positioning component, the first cylinder positioning seat, the second cylinder positioning seat, Elastic Sliding positioning component, spacing positioning component and the guide-localization assembly is automobile bonnet bend pipe reference dimension position.
The said first cylinder positioning seat and the second cylinder positioning seat short transverse adjustable positions.
Said spacing positioning component comprises limit base, and the U-lag piece is housed on the limit base.
The slip locating piece of said Elastic Sliding positioning component can horizontally slip.
Said guide-localization assembly is portable guide-localization assembly.
Above-mentioned automobile bonnet bend pipe welding special positioning fixture; Automobile bonnet bend pipe finished product in conjunction with the simple die making; Product orientation is welded on special positioning fixture at this; Be positioned at place, automobile bonnet bend pipe welding position to annex, annex welded on it with welding machine, can be according to bend pipe Adjusting Shape positioning tool structure beneficial effect
The method of above-mentioned employing simple die shaping automobile bonnet bend pipe considers that automobile bonnet bend pipe raw material are square section bars, belongs to a kind of elongated strip shaped raw material; Adopt traditional diel forming method, can cause pressure-pad-force too small, can't push down raw material; The drawback of enough pressure-pad-force is provided, directly utilizes simple die, product is formed; According to the not high characteristics of automobile bonnet bend pipe dimension precision requirement, changed in the common stamping process crooked conventional thought of from inside to outside carrying out simultaneously; What take is to carry out the bending operation from outside to inside, and a difficult problem of having avoided bending to step down has been simplified the structure of mould; Practice thrift production cost, satisfied the requirement that needs in the automobile bonnet bend pipe R&D process are constantly changed die shape.
Description of drawings
Accompanying drawing 1 is a bonnet bending tube forming process chart of the present invention.
Accompanying drawing 2 is bonnet bend pipe welding special positioning fixture user mode structural representations among the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is explained further details.
Shown in accompanying drawing 1, a kind of automobile bonnet bending tube forming method, it comprises following step: at first with square cutting of material; Promptly calculate raw-material development size according to product size; Carry out the blanking operation after will calculating the compensation of gained development size, obtain the required square profile size that is shaped, then carry out the bending first time according to the position of bending for the first time in the development size; In the process of bending for the first time; The doubling bending angle compensates, and bending angle compensation value is 2 degree, continue to the first time bending angle carry out shaping according to product net shape size; Then product is carried out the U-shaped bending; Then the product through the U-shaped bending is carried out shaping according to product net shape size, last termination cuts off, and guarantees that product two ends length dimension meets the requirements.
The manufacturing process of above-mentioned automobile bonnet bend pipe considers that automobile bonnet bend pipe raw material are square section bars, belongs to a kind of elongated strip shaped raw material; Adopt traditional diel forming method, can cause pressure-pad-force too small, can't push down raw material; The drawback of enough pressure-pad-force is provided, directly utilizes simple die, product is formed; According to the not high characteristics of automobile bonnet bend pipe dimension precision requirement, changed in the common stamping process crooked conventional thought of from inside to outside carrying out simultaneously; What take is to carry out the bending operation from outside to inside, and a difficult problem of having avoided bending to step down has been simplified the structure of mould; Practice thrift production cost, satisfied the requirement that needs in the automobile bonnet bend pipe R&D process are constantly changed die shape.
Behind the above-mentioned automobile bonnet bending tube forming, also need carry out the annex weld job, present weld job is on automated machine tool, to carry out; The annex welding position is fixed, and the debugging maintenance difficult is unfavorable for small lot test manufacture operation; In order to solve this attachment technique difficult problem; Shown in accompanying drawing 2, the present invention designs a kind of automobile bonnet bend pipe welding special positioning fixture, wherein; It comprises pedestal 1; Benchmark positioning component 2 is contained in pedestal 1 upper surface left side, and the first cylinder positioning seat 3 and the second cylinder positioning seat 4 lay respectively at pedestal 1 upper surface front and back two side positions, and Elastic Sliding positioning component 5 is positioned at pedestal 1 upper surface right positions; Spacing positioning component 6 is between pedestal 1 upper surface lower right side position second cylinder positioning seat 4 and Elastic Sliding positioning component 5, and guide-localization assembly 7 is between pedestal 1 upper surface upper right side, first cylinder positioning seat 3 and Elastic Sliding positioning component 5.
Relative position between said benchmark positioning component 2, the first cylinder positioning seat 3, the second cylinder positioning seat 4, Elastic Sliding positioning component 5, spacing positioning component 6 and the guide-localization assembly 7 is automobile bonnet bend pipe reference dimension position.
Said first cylinder positioning seat 3 and the second cylinder positioning seat, 4 short transverse adjustable positions.
Said spacing positioning component 6 comprises limit base 601, and U-lag piece 602 is housed on the limit base 601.
The slip locating piece 501 of said Elastic Sliding positioning component 5 can horizontally slip.
Said guide-localization assembly 7 is portable guide-localization assemblies.
Above-mentioned automobile bonnet bend pipe welding special positioning fixture; Automobile bonnet bend pipe finished product in conjunction with the simple die making; Product orientation is welded on special positioning fixture at this; Be positioned at place, automobile bonnet bend pipe welding position to annex, annex welded on it with welding machine, can be according to bend pipe Adjusting Shape positioning tool structure.
The automobile bonnet bending tube forming method of the present invention's design; With bending mould innermost crooked making the in the automobile bonnet bend pipe is shaped earlier; And then the bending shape in the outside is carried out bending and molding processing with Bending Mould, and obtaining required shape of product at last, this hardware stamping mould that utilizes can be changed mould fast according to the material behavior and the way of shape facility making automobile bonnet bend pipe; Satisfy in the automobile bonnet bend pipe small lot research and development production process; Need the constantly requirement of change product design, low price, simple in structure.
Mention all around in the present technique scheme, the just relative position of each part in the embodiment of the invention, rather than absolute position of the present invention, the technical scheme that any the present invention of receiving inspires all falls within protection scope of the present invention.
Claims (8)
1. automobile bonnet bending tube forming method is characterized in that it comprises following step:
(I) at first with square cutting of material, promptly calculate raw-material development size, will calculate and carry out the blanking operation after the gained development size compensates, obtain the required square profile size that is shaped according to product size;
(II) then carry out the bending first time according to the position of bending for the first time in the development size, in the process of bending for the first time, the doubling bending angle compensates;
(III) continue to the first time bending angle carry out shaping according to product net shape size;
(IV) then product is carried out the U-shaped bending;
(V) then the product through the U-shaped bending is carried out shaping according to product net shape size;
(VI) termination cuts off, and guarantees that product two ends length dimension meets the requirements.
2. a kind of automobile bonnet bending tube forming method as claimed in claim 1 is characterized in that: bending angle compensation value is 2 degree in the said step (I I).
3. an automobile bonnet bend pipe welds special positioning fixture; It is characterized in that: it comprises pedestal (1); Benchmark positioning component (2) is contained in pedestal (1) upper surface left side; The first cylinder positioning seat (3) and the second cylinder positioning seat (4) lay respectively at pedestal (1) upper surface front and back two side positions; Elastic Sliding positioning component (5) is positioned at pedestal (1) upper surface right positions, and spacing positioning component (6) is positioned between position, pedestal (1) upper surface lower right side second cylinder positioning seat (4) and the Elastic Sliding positioning component (5), and guide-localization assembly (7) is positioned between pedestal (1) upper surface upper right side first cylinder positioning seat (3) and the Elastic Sliding positioning component (5).
4. a kind of automobile bonnet bend pipe welding special positioning fixture as claimed in claim 3, it is characterized in that: the relative position between said benchmark positioning component (2), the first cylinder positioning seat (3), the second cylinder positioning seat (4), Elastic Sliding positioning component (5), spacing positioning component (6) and the guide-localization assembly (7) is automobile bonnet bend pipe reference dimension position.
5. a kind of automobile bonnet bend pipe welding special positioning fixture as claimed in claim 3 is characterized in that: the said first cylinder positioning seat (3) and second cylinder positioning seat (4) the short transverse adjustable positions.
6. a kind of automobile bonnet bend pipe welding special positioning fixture as claimed in claim 3, it is characterized in that: said spacing positioning component (6) comprises limit base (601), and U-lag piece (602) is housed on the limit base (601).
7. a kind of automobile bonnet bend pipe welding special positioning fixture as claimed in claim 3, it is characterized in that: the slip locating piece (501) of said Elastic Sliding positioning component (5) can horizontally slip.
8. a kind of automobile bonnet bend pipe welding special positioning fixture as claimed in claim 3, it is characterized in that: said guide-localization assembly (7) is portable guide-localization assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102292645A CN102728744A (en) | 2012-07-04 | 2012-07-04 | Forming method of car rear cover elbow and positioning fixture special for welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102292645A CN102728744A (en) | 2012-07-04 | 2012-07-04 | Forming method of car rear cover elbow and positioning fixture special for welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102728744A true CN102728744A (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102292645A Pending CN102728744A (en) | 2012-07-04 | 2012-07-04 | Forming method of car rear cover elbow and positioning fixture special for welding |
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| CN (1) | CN102728744A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104827226A (en) * | 2015-05-14 | 2015-08-12 | 广西梧州运龙港船机械制造有限公司 | Welding jig for inner wallboard of draft tube |
| CN104972258A (en) * | 2015-08-04 | 2015-10-14 | 无锡博进精密机械制造有限公司 | Welding positioning tool of bent-arc plate |
| CN111659779A (en) * | 2020-06-04 | 2020-09-15 | 上海诺玛液压系统有限公司 | Jet pipe servo valve thin-wall small pipe bending tool |
Citations (5)
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|---|---|---|---|---|
| JPH0930345A (en) * | 1995-07-18 | 1997-02-04 | Nissan Motor Co Ltd | Tubular member for car body structure and its manufacture |
| EP0955107B1 (en) * | 1998-05-07 | 2002-12-04 | Benteler Ag | Mehod of deforming a circular shaped tube in a U-shaped profile and apparatus for executing this method |
| CN201105298Y (en) * | 2007-10-10 | 2008-08-27 | 中国海洋石油总公司 | U-shaped pipe bending tool |
| CN101972914A (en) * | 2010-05-17 | 2011-02-16 | 浙江天兴管业有限公司 | Manufacture method for bending crooked pipe |
| CN102294571A (en) * | 2010-06-25 | 2011-12-28 | 上海月月潮钢管制造有限公司 | Method for manufacturing high-temperature and high-pressure steel pipe |
-
2012
- 2012-07-04 CN CN2012102292645A patent/CN102728744A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0930345A (en) * | 1995-07-18 | 1997-02-04 | Nissan Motor Co Ltd | Tubular member for car body structure and its manufacture |
| EP0955107B1 (en) * | 1998-05-07 | 2002-12-04 | Benteler Ag | Mehod of deforming a circular shaped tube in a U-shaped profile and apparatus for executing this method |
| CN201105298Y (en) * | 2007-10-10 | 2008-08-27 | 中国海洋石油总公司 | U-shaped pipe bending tool |
| CN101972914A (en) * | 2010-05-17 | 2011-02-16 | 浙江天兴管业有限公司 | Manufacture method for bending crooked pipe |
| CN102294571A (en) * | 2010-06-25 | 2011-12-28 | 上海月月潮钢管制造有限公司 | Method for manufacturing high-temperature and high-pressure steel pipe |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104827226A (en) * | 2015-05-14 | 2015-08-12 | 广西梧州运龙港船机械制造有限公司 | Welding jig for inner wallboard of draft tube |
| CN104827226B (en) * | 2015-05-14 | 2017-01-04 | 广西梧州运龙港船机械制造有限公司 | Mozzle inside panel weld jig |
| CN104972258A (en) * | 2015-08-04 | 2015-10-14 | 无锡博进精密机械制造有限公司 | Welding positioning tool of bent-arc plate |
| CN111659779A (en) * | 2020-06-04 | 2020-09-15 | 上海诺玛液压系统有限公司 | Jet pipe servo valve thin-wall small pipe bending tool |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 201518 dry Lane Town, Shanghai, Jinshan District Applicant after: SHANGHAI METALSA AUTO PARTS CO., LTD. Address before: 201518 Heping Industrial Zone, lane town, Shanghai, Jinshan District Applicant before: ISE Industries Shanghai Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: ISE INDUSTRIES SHANGHAI CO., LTD. TO: SHANGHAI MENGTASA AUTOMOBILE PARTS CO., LTD. |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121017 |