CN113770569B - Machining process for rear torsion beam of automobile - Google Patents
Machining process for rear torsion beam of automobile Download PDFInfo
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- CN113770569B CN113770569B CN202110919015.8A CN202110919015A CN113770569B CN 113770569 B CN113770569 B CN 113770569B CN 202110919015 A CN202110919015 A CN 202110919015A CN 113770569 B CN113770569 B CN 113770569B
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- welding
- torsion beam
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- mounting plate
- bushing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to the field of automobile rear suspension, in particular to a processing technology of an automobile rear torsion beam, which comprises the following specific steps: OP10: welding the left longitudinal arm, the right longitudinal arm and the cross beam body of the torsion beam by adopting an arc welding process; OP20: welding the beam body and the reinforcing plate by adopting an arc welding process; OP30: welding the spring disc and the shock absorber mounting bracket by adopting an arc welding process; OPX: performing primary high-precision laser on four key matching points abcd of the torsion beam; OP40: the torsion beam process parts of which four places have been subjected to laser finish machining are accurately positioned on a welding fixture, a left bushing, a right bushing, a left brake mounting plate and a right brake mounting plate are welded, and after the torsion beam OP30 is welded in an assembly process, high-precision laser is performed on the torsion beam key matching points abcd at four places in comparison with the existing welding process, accumulated deformation errors generated in the former three welding processes of OP10, OP20 and OP30 can be removed through one-time processing in the process, and the size precision requirement of the assembly key mounting points is guaranteed.
Description
Technical Field
The invention relates to the field of automobile rear suspension, in particular to a processing technology of an automobile rear torsion beam.
Background
As one of rear suspension types of automobiles, a torsion beam type suspension is also called a torsion beam type dependent suspension, wherein two ends of a torsion beam are connected with left and right wheels, and the up-and-down jumping of the left and right wheels is balanced through certain torsion rigidity of the torsion beam, so that the stability of the automobile is improved. Besides the setting of parameters and the like in the product design stage, the machining precision of the key installation dimension of the torsion beam in the later stage also has important influence on the assembly and the performance of the whole automobile.
As shown in fig. 2, the currently widely used machining process for the torsion beam is to sequentially weld the left and right trailing arm bodies OP10, the beam body, the reinforcing plate OP20, the spring disc and the damper mounting bracket OP30 of the torsion beam by using an arc welding process, and such a process has the disadvantage that after three processes are performed for welding, the accumulated welding deformation of the key matching points of the torsion beam sub-assembly OP30 is large, and the welding matching and the precision guarantee of the front bushing sleeve and the brake mounting plate of the lower process OP40 are affected. The problem to be solved is to eliminate the accumulated welding deformation caused by the former three welding processes OP10, OP20 and OP30 of the torsion beam and reduce the influence of the contour error in a dotted frame at four positions of the OP30 sub-assembly on the welding precision of the key fourth-process OP 40.
Disclosure of Invention
In order to solve the problems, the invention provides a machining process for an automobile rear torsion beam.
A processing technology of an automobile rear torsion beam comprises the following specific steps:
OP10: welding the left longitudinal arm, the right longitudinal arm and the cross beam body of the torsion beam by adopting an arc welding process;
OP20: welding the beam body and the reinforcing plate by adopting an arc welding process;
OP30: welding the spring disc and the shock absorber mounting bracket by adopting an arc welding process;
OPX: performing primary high-precision laser on four key matching points abcd of the torsion beam;
OP40: and precisely positioning the parts of the abcd in the torsion beam process after laser finish machining on a welding fixture, and welding the left bushing, the right bushing, the left brake mounting plate and the right brake mounting plate.
The line outline at the position a is the welding line outline of the left bushing mounting sleeve and the left trailing arm.
And the line contour at the position b is the contour of a welding line of the right bushing mounting sleeve and the right trailing arm.
And the line contour at the position c is the contour of a welding line of the left brake mounting plate and the left trailing arm.
And the line outline at the position d is the welded line outline of the right brake mounting plate and the right trailing arm.
The specific steps of the step OPX are as follows:
a. precisely positioning the OP30 welding subassembly on a processing clamp of a laser workstation, and presetting a laser track according to a data theoretical value;
b. precisely laser processing the contour of the four abcd lines of the OP30 welding sub-assembly to remove redundant materials, and uniformly performing one-time laser cutting processing correction on accumulated errors of the contour of the four abcd lines caused by all welding procedures before the OP30 welding sub-assembly;
c. the outline precision of four side lines of an OPX process part which is precisely laser-machined is high, and the influence of positioning errors possibly brought to a later key process OP40 by accumulated welding deformation of processes OP10, OP20 and OP30 is eliminated;
d. the OPX process part is positioned on the welding fixture, the left bushing, the right bushing, the left brake mounting plate and the right brake mounting plate are freely welded in a positioning mode, the welding deformation influence of the previous process is avoided, and the size precision requirements of the left bushing, the right bushing, the left brake mounting plate and the right brake mounting plate of the assembly can be met by single-process positioning adjustment.
The invention has the beneficial effects that: compared with the existing welding process, after the torsion beam OP30 is welded and sub-assembled, high-precision laser is performed on the key matching points abcd of the torsion beam at four positions, accumulated deformation errors generated in the previous three welding processes of OP10, OP20 and OP30 can be machined and removed at one time, and the requirements of dimensional precision of the left and right bushings and the left and right brake mounting plates at the key mounting points of the assembly are met.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a first perspective view of the present invention;
FIG. 2 is a flow chart of a prior art process of the background of the invention;
FIG. 3 is a flow chart of the process of the present invention;
fig. 4 is a schematic perspective view of the second embodiment of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below.
As shown in fig. 1 to 4, a process for machining a rear torsion beam of an automobile comprises the following specific steps:
OP10: welding a left trailing arm 1, a right trailing arm 2 and a cross beam body 3 of the torsion beam by adopting an arc welding process;
OP20: welding the beam body 3 and the reinforcing plate 4 by adopting an arc welding process;
OP30: welding the spring disc 5 and the shock absorber mounting bracket 6 by adopting an arc welding process;
OPX: performing primary high-precision laser on four key matching points abcd of the torsion beam;
OP40: and precisely positioning the parts of the abcd in the torsion beam process after laser finish machining on a welding fixture, and welding the left bushing, the right bushing, the left brake mounting plate 9 and the right brake mounting plate 10.
The line outline at the position a is the welding line outline of the left bushing mounting sleeve 7 and the left trailing arm 1.
The line outline at the position b is the welding line outline of the right bushing mounting sleeve 8 and the right trailing arm 2.
The line outline at the position c is the welding line outline of the left brake mounting plate 9 and the left trailing arm 1.
The line profile at the position d is the welding line profile of the right brake mounting plate 10 and the right trailing arm 2.
Compared with the existing welding process, after the torsion beam OP30 welding sub-assembly 13 process, high-precision laser is performed on four key matching points abcd of the torsion beam, accumulated deformation errors generated by the former OP10, OP20 and OP30 welding processes can be machined and removed in one step, and the requirements of dimensional precision of a left bushing, a right bushing and a left brake mounting plate of the key mounting point of the assembly are met.
The specific steps of the step OPX are as follows:
a. the OP30 welding sub-assembly 13 is accurately positioned on a processing clamp of a laser workstation, and a laser track is preset according to a data theoretical value;
b. performing accurate laser processing on the four-point line profile of the abcd of the OP30 welding subassembly 13 to remove redundant materials, uniformly performing one-time laser cutting processing correction on accumulated errors of the four-point line profile of the abcd caused by all welding procedures before the OP30 welding subassembly 13, and ensuring that the four-point line profile meets the requirement of the next key procedure OP40 on welding positioning accuracy;
c. the outline precision of four side lines of an OPX process part which is precisely laser-machined is high, and the influence of positioning errors possibly brought to a later key process OP40 by accumulated welding deformation of processes OP10, OP20 and OP30 is eliminated;
d. the OPX process part is positioned on the welding fixture, the left bushing, the right bushing, the left brake mounting plate 9 and the right brake mounting plate 10 can be freely welded in a positioning mode, the welding deformation influence of the previous process is avoided, and the size precision requirements of the left bushing, the right bushing, the left brake mounting plate 9 and the right brake mounting plate 10 of the assembly can be met only by single-process positioning adjustment.
As the most important 4 mounting points of the torsion beam, the position precision requirements of the left bushing, the right bushing, the left brake mounting plate 9 and the right brake mounting plate 10 of the torsion beam are high, and the precision of the key mounting points and the use performance of the torsion beam are ensured by a method for optimizing a processing technology.
The invention eliminates the accumulated welding deformation caused by the former three welding processes OP10, OP20 and OP30 of the torsion beam in FIG. 2, and reduces the influence of the contour error in a dotted frame at four positions of the OP30 sub-assembly on the welding precision of the key fourth process OP40 by OPX as shown in FIG. 3.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A processing technology of an automobile rear torsion beam is characterized in that: the method comprises the following specific steps:
OP10: welding Zuo Zongbei (1), a right trailing arm (2) and a cross beam body (3) of the torsion beam by adopting an arc welding process;
OP20: welding the beam body (3) and the reinforcing plate (4) by adopting an arc welding process;
OP30: welding the spring disc (5) and the shock absorber mounting bracket (6) by adopting an arc welding process;
OPX: performing primary high-precision laser on the torsion beam key matching points a, b, c and d;
OP40: accurately positioning the parts of the abcd in the torsion beam process after laser finish machining on a welding fixture, and welding a left bushing, a right bushing, a left brake mounting plate (9) and a right brake mounting plate (10); the line outline at a position is the welding line outline of the left bushing mounting sleeve (7) and the left trailing arm (1); the line outline at the b position is the welding line outline of the right bushing mounting sleeve (8) and the right trailing arm (2); the line outline at the position c is the welding line outline of the left brake mounting plate (9) and the left trailing arm (1); the line profile at the position d is the welding line profile of the right brake mounting plate (10) and the right trailing arm (2);
performing accurate laser processing on the four-point line profile of the abcd of the OP30 welding subassembly to remove redundant materials, and uniformly performing one-time laser cutting processing correction on accumulated errors of the four-point line profile of the abcd caused by all welding procedures before the OP30 welding subassembly; the outline precision of the four side lines of the OPX process piece which is precisely processed by laser is high, and the influence of positioning errors possibly brought to a later key process OP40 by accumulated welding deformation of the process OP10, the OP20 and the OP30 is eliminated.
2. The automobile rear torsion beam machining process according to claim 1, characterized in that: the specific steps of the step OPX are as follows:
a. the OP30 welding sub-assembly (13) is accurately positioned on a machining clamp of a laser workstation, and a laser track is preset according to a data theoretical value;
b. carrying out precise laser processing on the contour of four abcd lines of the OP30 welding sub-assembly (13) to remove redundant materials, and uniformly carrying out one-time laser cutting processing correction on accumulated errors of the contour of the four abcd lines caused by all welding procedures before the OP30 welding sub-assembly (13);
c. the outline precision of four side lines of an OPX process part which is precisely laser-machined is high, and the influence of positioning errors possibly brought to a later key process OP40 by accumulated welding deformation of processes OP10, OP20 and OP30 is eliminated;
d. the OPX process part is positioned on the welding fixture, the left bushing, the right bushing, the left brake mounting plate (9) and the right brake mounting plate (10) are freely welded in a positioning mode, the welding deformation influence of the previous process is avoided, and the size precision requirements of the left bushing, the right bushing, the left brake mounting plate (9) and the right brake mounting plate (10) of the assembly can be met by single-process positioning adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110919015.8A CN113770569B (en) | 2021-08-11 | 2021-08-11 | Machining process for rear torsion beam of automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110919015.8A CN113770569B (en) | 2021-08-11 | 2021-08-11 | Machining process for rear torsion beam of automobile |
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| Publication Number | Publication Date |
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| CN113770569A CN113770569A (en) | 2021-12-10 |
| CN113770569B true CN113770569B (en) | 2023-02-17 |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070014326A (en) * | 2005-07-28 | 2007-02-01 | 현대자동차주식회사 | Torsion beam of coupled torsion axle suspension |
| KR20130034108A (en) * | 2011-09-28 | 2013-04-05 | 현대자동차주식회사 | Bonding method of torsion beam axle and trailing arm using flash butt welding |
| CN102785059B (en) * | 2012-06-26 | 2015-07-15 | 慈溪市宏迪纺织机械有限公司 | Process for manufacturing bolster of spinning machine |
| CN103273292B (en) * | 2013-06-14 | 2016-04-20 | 沈阳飞机工业（集团）有限公司 | The control of the T-shaped part deformation of a kind of elongated complexity and compensation method |
| CN204278967U (en) * | 2014-11-18 | 2015-04-22 | 上海汇众汽车制造有限公司 | A kind of rear axle crossbeam |
| JP2017178250A (en) * | 2016-03-31 | 2017-10-05 | ダイハツ工業株式会社 | Torsion beam type suspension |
| CN106312381B (en) * | 2016-07-27 | 2018-04-17 | 上海汇众汽车制造有限公司 | Torsion beam rear axle welding procedure |
| CN208558934U (en) * | 2018-07-27 | 2019-03-01 | 四川建安工业有限责任公司 | Upper reinforcement structure for rear torsion beam suspension |
| CN208664875U (en) * | 2018-09-11 | 2019-03-29 | 海马新能源汽车有限公司 | A kind of automobile torsion beam and mounting structure |
| CN109591539A (en) * | 2018-11-29 | 2019-04-09 | 奇瑞商用车（安徽）有限公司 | A kind of automobile rear torsion beam assembly and its manufacturing method |
| CN212637077U (en) * | 2020-04-20 | 2021-03-02 | 重庆长安汽车股份有限公司 | Automobile torsion beam rear axle |
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