CN103056536B - Frame cross welding method - Google Patents
Frame cross welding method Download PDFInfo
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- CN103056536B CN103056536B CN201110322632.6A CN201110322632A CN103056536B CN 103056536 B CN103056536 B CN 103056536B CN 201110322632 A CN201110322632 A CN 201110322632A CN 103056536 B CN103056536 B CN 103056536B
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- lower plate
- upper plate
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Abstract
The invention provides a kind of frame cross welding method, wherein, comprising: by the lower plate fixed placement of frame cross at least two positioning supports faces of fixture; By the upper plate fixed placement of frame cross in lower plate, make that upper plate is overlapping with lower plate fits; Clamping force is applied to upper plate, makes the upper plate assembled in advance and lower slab integral deflection degree be greater than upper plate and the deflection degree of lower plate under the state of not stressing; Upper plate and lower plate are welded and fixed.Frame cross welding method provided by the invention is by applying clamping force to the upper plate be assembled in advance together and lower plate, under the effect of clamping force, make the deflection degree of upper plate and lower slab integral increase to its be in normal condition under deflection degree, weld again, welding deformation amount and the deflection reserved are cancelled out each other, realize the object reducing welding deformation, improve welding quality, ensure that the installation accuracy of crossbeam.
Description
Technical field
The present invention relates to auto manufacturing technology, particularly relate to a kind of frame cross welding method.
Background technology
Automobile frame generally comprises crossbeam and longeron, Fig. 1 is frame cross structural representation of the prior art, crossbeam is welded to form by the upper plate 1 be stamped to form and the laminating of lower plate 2 overlap usually, can there is the problem of sweating heat distortion, affect the overall dimensional accuracy of frame cross in welding process.For welding deformation, at present general adopt reserved welding deformation amount or make correcting pattern eliminate, but need a large amount of engineer testing due to above two kinds of measures, also need change stamping part die and cubing, therefore the cycle is long, costly simultaneously.
Summary of the invention
The invention provides a kind of frame cross welding method, to solve defect of the prior art, reduce costs, shorten the production cycle, enhance productivity.
The invention provides a kind of frame cross welding method, wherein, comprising:
By the lower plate fixed placement of frame cross at least two positioning supports faces of fixture;
By the upper plate fixed placement of frame cross in described lower plate, make that described upper plate is overlapping with described lower plate fits;
Clamping force is applied to described upper plate, makes the upper plate assembled in advance and lower slab integral deflection degree be greater than described upper plate and the deflection degree of lower plate under the state of not stressing;
Described upper plate and lower plate are welded and fixed.
Frame cross welding method provided by the invention, by applying clamping force to the upper plate be assembled in advance together and lower plate, under the effect of clamping force, make the deflection degree of upper plate and lower slab integral increase to its be in normal condition under deflection degree, weld, welding deformation amount and the deflection reserved are cancelled out each other again, and realize the object reducing welding deformation, improve welding quality, ensure that the installation accuracy of crossbeam.
Accompanying drawing explanation
Fig. 1 is frame cross structural representation of the prior art.
The frame cross welding method schematic flow sheet that Fig. 2 provides for the embodiment of the present invention.
The fixture schematic diagram that the frame cross welding method that Fig. 3 provides for the embodiment of the present invention uses.
Reference numeral:
1-upper plate; 2-lower plate; 3-first positioning supports face;
4-second positioning supports face.
Detailed description of the invention
The frame cross welding method schematic flow sheet that Fig. 2 provides for the embodiment of the present invention, embodiments providing a kind of frame cross welding method, specifically can performing for welding the frame cross shown in Fig. 1.The method comprises the steps:
Step 110, by lower plate 2 fixed placement of frame cross on fixture positioning supports face;
Step 120, by upper plate 1 fixed placement of frame cross in lower plate 2, make that upper plate 1 is overlapping with lower plate 2 fits;
Step 130, clamping force is applied to upper plate 1, make the upper plate 1 assembled in advance be greater than upper plate 1 and the deflection degree of lower plate 2 under the state of not stressing with the overall deflection degree of lower plate 2;
In above-mentioned steps 130, operation upper plate 1 being applied to clamping force can be specifically: adopt positioning and clamping mechanism, to the two ends applying active force straight down of upper plate 1, this force transmission is to lower plate 2, the upper plate 1 of having fitted fixing when making to mate in advance and lower plate 2 integrally bending, until be bent to setting deflection degree.
Step 140, upper plate 1 and lower plate 2 to be welded and fixed.
Preferably, after step 140, the method can also comprise: remove clamping force, after naturally being cooled by weld seam.After cooling, welding deformation amount is cancelled out each other with the deflection deformation amount applied in advance, thus makes the size of crossbeam meet required precision.
In actual applications, in order to cost-saving, can transform existing fixture, after utilizing existing fixture to weld crossbeam, the distortion of crossbeam is larger, positioning supports face on fixture is processed, make its height reduction, correspondingly, clamping head length on fixture is increased, by improved fixture, clamping is positioned to crossbeam, thus make crossbeam can produce certain anti-deformation on fixture, the deflection that this deflection and postwelding produce is cancelled out each other, and can realize the object improving postwelding precision.
In the present embodiment, to upper plate 1 and the following condition of lower plate 2 overall deflection degree demand fulfillment: apply clamping force to upper plate 1, the upper plate 1 assembled in advance and the overall deflection degree of lower plate 2 and upper plate 1 and the difference of lower plate 2 between the deflection degree under the state of not stressing is made to equal the default post welding distortion amount of upper plate 1 and lower plate 2, the post welding distortion amount that this default deflection is estimation or measures, the deflection degree change of this crossbeam is post welding distortion amount.
Particularly, in order to determine that post welding distortion amount is to determine the trim amount of fixture, can utilize existing appliance special for detecting to carry out the prediction of welding deformation amount, first with glue, upper plate 1 and lower plate 2 are bonded together, put into appliance special for detecting to detect, if test passes, take off upper plate 1 and lower plate 2, implement common welding, the crossbeam that postwelding has been out of shape puts into appliance special for detecting again, the deviation of crossbeam in cubing is measured, post welding distortion amount can be obtained, thus determine the trim amount of fixture according to deflection.
Above-mentioned fixture can comprise multiple positioning supports face, and preferably, by lower plate 2 fixed placement of frame cross on fixture four positioning supports faces, four positioning supports faces are uniformly distributed with the Central Symmetry of lower plate 2, to realize more stable support to crossbeam.
Further, can transform on the basis of existing fixture, as shown in Figure 3, reduce the height in fixture first positioning supports face 3, with lower plate 2 described in described first positioning supports face 3 and the second positioning supports face 4 common support, thus realize the work to reversible deformation before above-mentioned crossbeam enforcement weldering on existing fixture.
The frame cross welding method that the embodiment of the present invention provides provides the pre-allowance of welding deformation by the height adjusting existing fixture support face, achieves the object reducing welding deformation, improves welding quality, reduce cost.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. a frame cross welding method, is characterized in that, comprising:
By lower plate (2) fixed placement of frame cross at least two positioning supports faces of fixture;
By upper plate (1) fixed placement of frame cross in described lower plate (2), make that described upper plate (1) is overlapping with described lower plate (2) fits;
Adopt positioning and clamping mechanism, to the two ends applying clamping force straight down of upper plate (1), this clamping force is passed to lower plate (2), the upper plate (1) of having fitted fixing when making to mate in advance and lower plate (2) integrally bending, make the upper plate (1) assembled in advance be greater than described upper plate (1) and lower plate (2) deflection degree under the state of not stressing with lower plate (2) overall deflection degree;
Described upper plate (1) and lower plate (2) are welded and fixed.
2. frame cross welding method according to claim 1, is characterized in that, after described upper plate (1) and lower plate (2) being welded and fixed, also comprises:
Remove described clamping force, weld seam is cooled naturally.
3. frame cross welding method according to claim 1 and 2, is characterized in that, lower plate (2) fixed placement of frame cross is specifically comprised at least two positioning supports faces of fixture:
By lower plate (2) fixed placement of frame cross on four positioning supports faces of fixture, described four positioning supports faces are uniformly distributed with the Central Symmetry of lower plate (2).
4. frame cross welding method according to claim 3, is characterized in that, after the lower plate fixed placement of frame cross is on four positioning supports faces of fixture, also comprises:
Reduce the height in fixture first positioning supports face (3), with lower plate (2) described in described first positioning supports face (3) and the second positioning supports face (4) common support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110322632.6A CN103056536B (en) | 2011-10-21 | 2011-10-21 | Frame cross welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110322632.6A CN103056536B (en) | 2011-10-21 | 2011-10-21 | Frame cross welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103056536A CN103056536A (en) | 2013-04-24 |
| CN103056536B true CN103056536B (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110322632.6A Active CN103056536B (en) | 2011-10-21 | 2011-10-21 | Frame cross welding method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109014721B (en) * | 2018-08-20 | 2021-02-09 | 中车青岛四方机车车辆股份有限公司 | Welding deformation control method and device |
| CN113649750A (en) * | 2021-08-27 | 2021-11-16 | 浙江澳冠智能装备有限公司 | Frame welding tool based on intelligent flexible welding robot |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU956195A1 (en) * | 1981-02-12 | 1982-09-07 | Днепродзержинский Ордена Трудового Красного Знамени Индустриальный Институт Им.М.И.Арсеничева | Flux retaining apparatus for automatic welding in vertical position |
| CN1927531A (en) * | 2006-09-28 | 2007-03-14 | 哈尔滨工业大学 | Clamp for controlling thin plate welding deformation and crack by bidirectional inherent stress |
| CN101121224A (en) * | 2007-08-21 | 2008-02-13 | 中国南车集团戚墅堰机车车辆厂 | Automatic assembly welding device for car frame side beam |
| CN201500869U (en) * | 2009-08-31 | 2010-06-09 | 中国北车集团大同电力机车有限责任公司 | Welding and Clamping Equipment for Longitudinal Beam of Locomotive Underframe |
-
2011
- 2011-10-21 CN CN201110322632.6A patent/CN103056536B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU956195A1 (en) * | 1981-02-12 | 1982-09-07 | Днепродзержинский Ордена Трудового Красного Знамени Индустриальный Институт Им.М.И.Арсеничева | Flux retaining apparatus for automatic welding in vertical position |
| CN1927531A (en) * | 2006-09-28 | 2007-03-14 | 哈尔滨工业大学 | Clamp for controlling thin plate welding deformation and crack by bidirectional inherent stress |
| CN101121224A (en) * | 2007-08-21 | 2008-02-13 | 中国南车集团戚墅堰机车车辆厂 | Automatic assembly welding device for car frame side beam |
| CN201500869U (en) * | 2009-08-31 | 2010-06-09 | 中国北车集团大同电力机车有限责任公司 | Welding and Clamping Equipment for Longitudinal Beam of Locomotive Underframe |
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| Title |
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| "商务车前桥横梁焊接机器人工作站关键技术研究";吕堃;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》;20070415(第04期);论文正文第11-17页 * |
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| CN103056536A (en) | 2013-04-24 |
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