CN105269138A - Novel metal welding method - Google Patents
Novel metal welding method Download PDFInfo
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- CN105269138A CN105269138A CN201410285506.1A CN201410285506A CN105269138A CN 105269138 A CN105269138 A CN 105269138A CN 201410285506 A CN201410285506 A CN 201410285506A CN 105269138 A CN105269138 A CN 105269138A
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Abstract
Provided is a novel metal welding method. The method comprises: firstly, welding a bulge on a to-be-welded position of a first metal material, and then using a resistance welding machine or an electrode holder whose upper electrode and lower electrode are flat electrodes to weld the first metal material with the bulge with a second metal material. The design enlarges application range, improves strength of a welded joint and surface quality, and reduces production cost and prolongs service life of the electrodes.
Description
Technical field
The present invention relates to metal solder field, particularly relate to a kind of novel metal welding methods, be specifically applicable to the service life expanding the scope of application, the intensity promoting welding point and surface quality, prolongation electrode.
Background technology
At present, bus body generally adopts rectangular tube as skeleton, and thin plate, as the structure of covering, relates to a large amount of tubing and sheet material connectivity problem.Along with the extensive use of shaped by fluid pressure pipe in automotive light weight technology, in the vehicle such as car, truck, also relate to the problem that some tubing are connected with sheet material, as positions such as roof gusset crossbeam, roof rail, chassis runners.Because mostly sheet material in these structures is to be used as appearance member, therefore, while guarantee strength of joint, also surface quality should be improved as much as possible.
Resistance spot welding is welding method most widely used in current body of a motor car, its automaticity is high, cost is lower, quality is comparatively reliable, but in the connection of tubing and sheet material, because the inside of pipe does not support, in pinpoint welding procedure, under the effect of electrode force, generation is out of shape, especially traditional pneumatic welding gun impulsive force is larger, in tube sheet spot welding pressure process, make tube sheet produce distortion in advance, also tube failure can be made time serious, cause being difficult to welding, or there is depression in various degree and crackle after welding, therefore when tubing adopts resistance spot welding to be connected with sheet material at present, joint quality is comparatively difficult to ensure.Have data to show and adopt the quality of servo torch to tube sheet spot welding to have some improvement, but effect is still not very good, and cost is higher, be difficult to promote.
Chinese patent application publication No. is CN103737191A, Shen Qing Publication day is that the patent of invention on April 23rd, 2014 discloses a kind of sheet metal component projection-welding structure and projection welding process thereof, comprise sheet metal component and the projection welding part of welding mutually, projection welding part is the part of circle shell-like, sheet metal component is provided with through hole at projection welding position, multiple convex tendon towards projection welding part projection is provided with around through hole, during welding, first projection welding part is enclosed within the electrode tip of special projection welding electrode, then the sheet metal component with the projection welding of projection welding part is positioned on projection welding part, convex tendon and projection welding part end face are fitted, place steadily and carry out projection welding.Although this invention achieves the projection welding of non-standard product, but still there is following defect:
1, the projection welding that this invention adopts is mainly used in the welding of round shell-like axis of workpiece direction perpendicular to thin plate, and the scope of application is narrower;
2, the projection in this invention on sheet metal component is that punching press obtains, and need in preparation process to adopt corresponding mould, cost is higher, is only suitable for batch production, meanwhile, when metal material is blocked up, and protruding prefabricated difficulty, complex process.
Summary of the invention
The object of the invention is to overcome that the scope of application existed in prior art is narrower, cost is higher, the problem of complex process, provide that a kind of scope of application is wider, with low cost, the novel metal welding methods of technique flexible and convenient.
For realizing above object, technical scheme of the present invention is as follows:
A novel metal welding methods, the method comprises protruding precasting process, resistance-welding process successively;
The place to be welded that the precasting process of described projection is included in a metal material is welded out projection;
Described resistance-welding process refers to and adopts resistance welder or soldering turret to be welded out a protruding metal material and No. two Metal Material Weldings.
In the precasting process of described projection, protruding penetration rate be 20% ?80%, protruding height be 1 ?8mm.
Described projection is dots structure, and its basal diameter is
, wherein, k be span 4 ?7 constant coefficient, t is the thickness of metal material thinner in a metal material, No. two metal materials.
In the precasting process of described projection, before the place to be welded of a metal material is welded out projection, first determine according to the size of projection and required precision the welding method that prefabricated projection adopts, then select wlding according to the material of the welding method determined and a metal material, No. two metal materials.
In described resistance-welding process, top electrode, the bottom electrode of resistance welder or soldering turret are flat electrodes.
Compared with prior art, beneficial effect of the present invention is:
1, a kind of novel metal welding methods of the present invention is first welded out projection at the place to be welded of a metal material, this method flexible and convenient operation, without the need to adopting the extra means such as mould, with low cost, and the thickness of the position of butt welding point and a metal material is unrestricted, can be used for welding between sheet material with sheet material, between sheet material with tubing, between tubing with tubing, the scope of application is wider.Therefore, the present invention not only scope of application is comparatively wide, and with low cost.
2, the top electrode of resistance welder or soldering turret in a kind of novel metal welding methods of the present invention, bottom electrode is flat electrodes, on the one hand, the wearing and tearing of flat electrodes and the impact by coating less, make current stabilization, not only ensure that the reliable and stable of welding quality, and be conducive to the life-span extending electrode, on the other hand, when a metal material or No. two metal materials are tubing, employing flat electrodes can reduce the pressure in electrode pair tubing unit are, avoid tubing to be heated after pressurized and occur darker load mould or crackle, thus ensure that very even curface quality and reliable and stable Joint Strength.Therefore, the present invention not only ensure that stability of the welding quality, extend the service life of electrode, improve intensity and the surface quality of welding point, and solve the problem that sheet material and the sheet material that tubing, tubing differ larger with tubing, thickness of slab is comparatively difficult to adopt electric resistance welding.
Accompanying drawing explanation
Fig. 1 is the electric resistance welding schematic diagram of embodiment 1.
Fig. 2 is the structural representation of Fig. 1 protrusions.
In figure: metal material 1, protruding 2, top electrode 3, bottom electrode 4, No. two metal materials 5, height H, basal diameter D.
Detailed description of the invention
Illustrate that the present invention is further detailed explanation with detailed description of the invention below in conjunction with accompanying drawing.
See Fig. 1, Fig. 2, a kind of novel metal welding methods, the method comprises protruding precasting process, resistance-welding process successively;
The place to be welded that the precasting process of described projection is included in a metal material 1 is welded out protruding 2;
Described resistance-welding process refers to and adopts resistance welder or soldering turret to be welded with No. two metal materials 5 by the metal material 1 being welded out protruding 2.
In the precasting process of described projection, the penetration rate of protruding 2 be 20% ?80%, protruding 2 height H be 1 ?8mm.
Described protruding 2 is dots structure, and its basal diameter D is
, wherein, k be span 4 ?7 constant coefficient, t is the thickness of metal material thinner in a metal material 1, No. two metal materials 5.
In the precasting process of described projection, be welded out at the place to be welded of a metal material 1 before protruding 2, first according to protruding 2 size and required precision determine the welding method that prefabricated projection adopts, then select the wlding matched with it according to the material of the welding method determined and a metal material 1, No. two metal materials 5.
In described resistance-welding process, top electrode 3, the bottom electrode 4 of resistance welder or soldering turret are flat electrodes.
Principle of the present invention is described as follows:
When adopting conventional resistance spot welding to weld passenger car barrel, plate, along with the rising of temperature there will be ruckbildung after the energising of solder joint place, easily subside under larger electrode pressure, be difficult to form nugget, in order to concentrated current density, control temperature field and position, nucleating center, the present invention proposes the method precasting salient point at metal material surface to be welded, during energising, current density will concentrate on the contact site of salient point and metal material, make this place's temperature the highest, become the center of forming core.
In the conventional spot welding of sheet material, along with thickness of slab gap becomes large, joint quality can significantly decline, Thickness Ratio once close to or exceed a certain ratio, property of welded joint greatly reduces, surface quality sharply declines, the high strength steel plate of extensive use gradually at present, band clad steel sheet, the problems such as also ubiquity stability of the welding quality is poor, electrode life is short.Adopt the inventive method, not only can break through the restriction of thickness of slab ratio, and more easily ensure intensity and the surface quality of welding point.
The present invention by the size Control of protruding 2 in suitable scope, be conducive to the reliable in quality ensureing welding point, the shape of protruding 2 can be designed to point-like, linear, arc or annular etc. as required, generally adopting when replacing general point Welding point-like protruding, the welding point being similar to spot welding can be obtained.
In protruding precasting process, the welding method that prefabricated projection adopts is determined in the first size according to projection 2 and required precision, and as arc welding, built-up welding etc., general employing arc welding can obtain the projection meeting average operating at a lower cost.
In resistance-welding process, select universal resistance welder or soldering turret can realize a metal material 1 and weld with the reliable of No. two metal materials 5, simple and practical, be suitable for produced on-site.
When metal material is tubing, the thickness of metal material of the present invention is the wall thickness of tubing, and when metal material is sheet material, the thickness of metal material of the present invention is sheet metal thickness.
Embodiment 1:
See Fig. 1, Fig. 2, a kind of novel metal welding methods, the method comprises following technique successively:
Protruding precasting process: the first size according to projection 2 and required precision determine that the welding method that prefabricated projection adopts is arc welding, again according to arc welding and a metal material 1, the material of No. two metal materials 5 selects wlding metal material 1, the material of No. two metal materials 5 selects the wlding matched, then arc welder is adopted to go out protruding 2 in the place to be welded arc-welding of a metal material 1, wherein, metal material 1 for size be the rectangular tube of 40mm × 30mm × 1.5mm, No. two metal materials 5 for thickness be the thin plate of 1mm, the fusion penetration of protruding 2 is 0.8mm, penetration rate is 53%, height H is 1.8mm, basal diameter D is 5mm,
Resistance-welding process: adopt top electrode 3, bottom electrode 4 to be the resistance welder of flat electrodes or the metal material 1 precasting protruding 2 welds with No. two metal materials 5 by soldering turret, wherein, electrode pressure is 3000N, and welding current is 8000A, and conduction time is 8cyc.
The strength of welded joint adopting the present embodiment to obtain is reliable, and surfacing is without impression.
Claims (5)
1. a novel metal welding methods, the method comprises protruding precasting process, resistance-welding process successively, it is characterized in that:
The place to be welded that the precasting process of described projection is included in a metal material (1) is welded out projection (2);
Described resistance-welding process refers to that the metal material (1) adopting resistance welder or soldering turret will be welded out projection (2) is welded with No. two metal materials (5).
2. a kind of novel metal welding methods according to claim 1, is characterized in that: in the precasting process of described projection, the penetration rate of protruding (2) be 20% ?80%, the height (H) of protruding (2) be 1 ?8mm.
3. a kind of novel metal welding methods according to claim 2, it is characterized in that: described projection (2) is dots structure, its basal diameter (D) is
, wherein, k be span 4 ?7 constant coefficient, t is the thickness of metal material thinner in a metal material (1), No. two metal materials (5).
4. according to claim 1 ?a kind of novel metal welding methods according to any one of 3, it is characterized in that: in the precasting process of described projection, before the place to be welded of a metal material (1) is welded out projection (2), first determine according to the size of protruding (2) and required precision the welding method that prefabricated projection adopts, then select wlding according to the material of the welding method determined and a metal material (1), No. two metal materials (5).
5. according to claim 1 ?a kind of novel metal welding methods according to any one of 3, it is characterized in that: in described resistance-welding process, top electrode (3), the bottom electrode (4) of resistance welder or soldering turret are flat electrodes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410285506.1A CN105269138B (en) | 2014-06-24 | 2014-06-24 | A kind of metal welding methods |
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| CN201410285506.1A CN105269138B (en) | 2014-06-24 | 2014-06-24 | A kind of metal welding methods |
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| CN105269138A true CN105269138A (en) | 2016-01-27 |
| CN105269138B CN105269138B (en) | 2018-10-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782355A (en) * | 2016-08-25 | 2018-03-09 | 中国第汽车股份有限公司 | A kind of sheet metal component detection method based on robot servo soldering turret |
| CN108747064A (en) * | 2017-04-18 | 2018-11-06 | 上海交通大学 | Resistance projection-welding composite connecting method and its system |
| CN110449716A (en) * | 2019-08-03 | 2019-11-15 | 南京好龙电子有限公司 | A kind of electric resistance welding structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797878A (en) * | 1980-12-08 | 1982-06-17 | Honda Motor Co Ltd | Partial welding method for steel sheets |
| US20040112872A1 (en) * | 2002-12-17 | 2004-06-17 | Chih-Chang Chen | Method for single sided spot welding |
| CN1791489A (en) * | 2003-03-31 | 2006-06-21 | 三菱电机株式会社 | Projection welding equipment and its projection welding method |
| CN101234453A (en) * | 2007-01-30 | 2008-08-06 | 通用电气公司 | Projection weld and method for creating the same |
| JP2009095881A (en) * | 2007-10-19 | 2009-05-07 | Sumitomo Metal Ind Ltd | Method of manufacturing welded structural member |
| CN102962644A (en) * | 2012-11-26 | 2013-03-13 | 遂宁华能机械有限公司 | Preparation method of thin roller breaking barrel of wear-resistant crusher |
-
2014
- 2014-06-24 CN CN201410285506.1A patent/CN105269138B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797878A (en) * | 1980-12-08 | 1982-06-17 | Honda Motor Co Ltd | Partial welding method for steel sheets |
| US20040112872A1 (en) * | 2002-12-17 | 2004-06-17 | Chih-Chang Chen | Method for single sided spot welding |
| CN1791489A (en) * | 2003-03-31 | 2006-06-21 | 三菱电机株式会社 | Projection welding equipment and its projection welding method |
| CN101234453A (en) * | 2007-01-30 | 2008-08-06 | 通用电气公司 | Projection weld and method for creating the same |
| JP2009095881A (en) * | 2007-10-19 | 2009-05-07 | Sumitomo Metal Ind Ltd | Method of manufacturing welded structural member |
| CN102962644A (en) * | 2012-11-26 | 2013-03-13 | 遂宁华能机械有限公司 | Preparation method of thin roller breaking barrel of wear-resistant crusher |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782355A (en) * | 2016-08-25 | 2018-03-09 | 中国第汽车股份有限公司 | A kind of sheet metal component detection method based on robot servo soldering turret |
| CN108747064A (en) * | 2017-04-18 | 2018-11-06 | 上海交通大学 | Resistance projection-welding composite connecting method and its system |
| CN110449716A (en) * | 2019-08-03 | 2019-11-15 | 南京好龙电子有限公司 | A kind of electric resistance welding structure |
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| CN105269138B (en) | 2018-10-30 |
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