CN105269138B - Metal welding method - Google Patents
Metal welding method Download PDFInfo
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- CN105269138B CN105269138B CN201410285506.1A CN201410285506A CN105269138B CN 105269138 B CN105269138 B CN 105269138B CN 201410285506 A CN201410285506 A CN 201410285506A CN 105269138 B CN105269138 B CN 105269138B
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- welding
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000004021 metal welding Methods 0.000 title claims abstract description 14
- 238000003466 welding Methods 0.000 claims abstract description 76
- 239000007769 metal material Substances 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims description 9
- 238000005476 soldering Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 230000035515 penetration Effects 0.000 claims description 5
- 150000002739 metals Chemical class 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Resistance Welding (AREA)
- Arc Welding In General (AREA)
Abstract
A metal welding method includes such steps as welding the first metal material to be welded to form a boss, and welding the first and second metal materials by a resistance welder or a welding tongs whose upper and lower electrodes are flat electrodes. The design not only enlarges the application range, improves the strength and the surface quality of the welding joint, but also reduces the production cost and prolongs the service life of the electrode.
Description
Technical field
The present invention relates to metal welding field more particularly to a kind of metal welding methods, and it is particularly applicable to expand applicable model
Enclose, promoted the intensity and surface quality, the service life for extending electrode of welding point.
Background technology
Currently, bus body generally uses rectangular tube as skeleton, structure of the thin plate as covering is related to largely managing
Material and plank connectivity problem.With extensive use of the hydro-forming pipe in automotive light weight technology, in the vehicles such as car, truck
It is related to the problem of some tubing are connect with plank, such as roof gusset crossbeam, roof rail, chassis runner position.Due to this
Plank is used as appearance member more in a little structures, therefore, while ensureing strength of joint, should also improve surface matter as far as possible
Amount.
Resistance spot welding is welding method most widely used in current body of a motor car, and high degree of automation, cost is relatively low, matter
Amount is more reliable, but in the connection of tubing and plank, since the inside of pipe does not support, in pinpoint welding procedure, in electrode force
Under the action of will be deformed, especially traditional pneumatic welding gun impact force is bigger, in tube sheet spot welding pressure process so that
Tube sheet is deformed in advance, and tube failure can be also made when serious, causes to be difficult to solder to, or different degrees of recess occurs after welding
And crackle, therefore at present tubing when being connect using resistance spot welding with plank joint quality be relatively difficult to ensure.There is data display to use
Servo torch has some improvement to the quality of tube sheet spot welding, but effect is not still very ideal, and cost is higher, it is difficult to promote.
Chinese patent application publication No. is CN103737191A, and data of publication of application is the patent of invention on April 23rd, 2014
A kind of sheet metal component projection-welding structure and its projection welding process are disclosed, including the sheet metal component and projection welding part welded mutually, projection welding part is circle
The part of shell-like, sheet metal component are equipped with through-hole at projection welding position, and multiple convex ribs towards projection welding part protrusion, weldering are equipped with around through-hole
When connecing, first projection welding part is sleeved on the electrode tip of dedicated projection welding electrode, then will be positioned over the sheet metal component of projection welding part projection welding
On projection welding part, convex ribs are bonded with projection welding part end face, place steady rear progress projection welding.Although the invention realizes non-standard product
Projection welding, but still have the following defects：
1, the projection welding that the invention uses is mainly used in welding of the round shell-like axis of workpiece direction perpendicular to thin plate, is applicable in model
It encloses relatively narrow；
2, the protrusion in the invention on sheet metal component for punching press be made, needed in preparation process use corresponding mold, cost compared with
Height is appropriate only for producing in batches, meanwhile, when metal material is blocked up, the prefabricated difficulty of protrusion, complex process.
Invention content
The purpose of the present invention is overcoming, narrow scope of application existing in the prior art, cost are higher, complex process ask
Topic, provides a kind of scope of application wider, of low cost, technique flexible and convenient metal welding methods.
In order to achieve the above object, technical scheme is as follows：
A kind of metal welding methods, this method include precasting process, the resistance-welding process of protrusion successively；
The place to be welded that the precasting process of the protrusion is included in No.1 metal material is welded out protrusion；
The resistance-welding process refers to that will be welded out raised No.1 metal material and No. two using resistance welder or soldering turret
Metal Material Welding.
In the precasting process of the protrusion, raised penetration rate is 20%-80%, and raised height is 1-8mm.
The protrusion is dots structure, and basal diameter isWherein, k is value range in the constant coefficient of 4-7, t
For the thickness of relatively thin metal material in No.1 metal material, No. two metal materials.
In the precasting process of the protrusion, before the place to be welded of No.1 metal material is welded out protrusion, first according to convex
The size and required precision risen determines the welding method that prefabricated protrusion uses, then according to determining welding method and No.1 metal
Material, No. two metal materials material select wlding.
In the resistance-welding process, the top electrode of resistance welder or soldering turret, lower electrode are flat electrodes.
Compared with prior art, beneficial effects of the present invention are：
1, a kind of metal welding methods of the present invention are first welded out protrusion at the place to be welded of No.1 metal material, method operation
Flexibly and easily, of low cost without extra means such as molds, and the thickness of the position of butt welding point and No.1 metal material
Without limitation, it can be used between plank and plank, the welding between plank and tubing, between tubing and tubing, the scope of application is wider.
Therefore, not only the scope of application is wider by the present invention, but also of low cost.
2, the top electrode of resistance welder or soldering turret, lower electrode are flat electrodes in a kind of metal welding methods of the present invention, and one
Aspect, the abrasion of flat electrodes and is influenced smaller by coating so that electric current is stablized, and not only ensure that the stabilization of welding quality can
It leans on, and is conducive to extend the service life of electrode, on the other hand, when No.1 metal material or No. two metal materials are tubing, use
Flat electrodes can reduce electrode to the pressure on tubing unit area, deeper load mould occur after avoiding tubing is heated from being pressurized or split
Line, to ensure that the extremely reliable Joint Strength of even curface quality and stability.Therefore, the present invention not only ensure that welding
Quality stability extends the service life of electrode, improves the intensity and surface quality of welding point, and solves plank
The plank for differing larger with tubing, tubing with tubing, plate thickness is relatively difficult to the problem of using electric resistance welding.
Description of the drawings
Fig. 1 is the electric resistance welding schematic diagram of embodiment 1.
Fig. 2 is the structural schematic diagram of Fig. 1 protrusions.
In figure：No.1 metal material 1, protrusion 2, top electrode 3, lower electrode 4, No. two metal materials 5, height H, basal diameters
D。
Specific implementation mode
The present invention is described in further detail with specific implementation mode for explanation below in conjunction with the accompanying drawings.
Referring to Fig. 1, Fig. 2, a kind of metal welding methods, this method includes precasting process, the resistance-welding process of protrusion successively；
The place to be welded that the precasting process of the protrusion is included in No.1 metal material 1 is welded out protrusion 2；
The resistance-welding process refers to the No.1 metal material 1 and two that protrusion 2 will be welded out using resistance welder or soldering turret
Number metal material 5 welds.
In the precasting process of the protrusion, the penetration rate of protrusion 2 is 20%-80%, and the height H of protrusion 2 is 1-8mm.
Described raised 2 be dots structure, and basal diameter D isWherein, k is constant coefficient of the value range in 4-7,
T is the thickness of relatively thin metal material in 1, No. two metal material 5 of No.1 metal material.
In the precasting process of the protrusion, before the place to be welded of No.1 metal material 1 is welded out protrusion 2, first basis
The size of protrusion 2 and required precision determine the welding method that prefabricated protrusion uses, then according to determining welding method and No.1
The material of 1, No. two metal material 5 of metal material selects matched wlding.
In the resistance-welding process, the top electrode 3 of resistance welder or soldering turret, lower electrode 4 are flat electrodes.
The principle of the present invention is described as follows：
When being welded to passenger car barrel, plate using conventional resistance spot welding, with temperature after being powered at solder joint
Raising will appear ruckbildung, be easy to collapse under larger electrode pressure, it is difficult to nugget is formed, in order to concentrate current density,
Control temperature field and nucleating center position, the present invention propose the method for precasting salient point in metal material surface to be welded,
When energization, current density will focus on the contact site of salient point and metal material so that temperature highest at this becomes in forming core
The heart.
In the conventional spot welding of plank, as plate thickness gap becomes larger, joint quality can be remarkably decreased, and thickness ratio is once close
Or be more than a certain ratio, property of welded joint is greatly lowered, and surface quality drastically declines, at present gradual widely applied high-strength steel
The problems such as plate, band clad steel sheet, also generally existing stability of the welding quality is poor, electrode life is short.Using the method for the present invention,
The limitation of plate thickness ratio can be not only broken through, but also is easier to ensure that the intensity and surface quality of welding point.
The size Control of protrusion 2 in suitable range, is advantageously ensured that the reliable in quality of welding point by the present invention, convex
Dotted, linear, arc or annular etc. can be designed to as needed by playing 2 shape, generally be adopted when replacing common spot-welding technology
With dot bulge, the welding point for being similar to spot welding can get.
In the precasting process of protrusion, the welding side of prefabricated protrusion use is first determined according to the size of protrusion 2 and required precision
Method, such as arc welding, built-up welding generally can obtain the protrusion for meeting average operating at a lower cost using arc welding.
In resistance-welding process, select universal resistance welder or soldering turret that No.1 metal material 1 and No. two metals can be realized
The reliable welding of material 5, it is simple and practical, it is 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, works as metal material
For plank when, the thickness of metal material of the present invention is plate thickness.
Embodiment 1：
Referring to Fig. 1, Fig. 2, a kind of metal welding methods, this method includes following technique successively：
The precasting process of protrusion：The welding method of prefabricated protrusion use is first determined according to the size of protrusion 2 and required precision
For arc welding, wlding No.1 metal material is selected further according to the material of 1, No. two metal material 5 of arc welding and No.1 metal material
1, the material of No. two metal materials 5 selects matching wlding, then uses arc welder in the to be welded of No.1 metal material 1
The place's of connecing arc-welding goes out protrusion 2, wherein No.1 metal material 1 is the rectangular tube that size is 40mm × 30mm × 1.5mm, No. two metals
Material 5 is the thin plate that thickness is 1mm, and the fusion penetration of protrusion 2 is 0.8mm, and penetration rate 53%, height H is 1.8mm, basal diameter D
For 5mm；
Resistance-welding process：It is the resistance welder of flat electrodes using top electrode 3, lower electrode 4 or soldering turret will precasts protrusion 2
No.1 metal material 1 and No. two metal materials 5 weld, wherein electrode pressure 3000N, welding current 8000A are powered
Time is 8cyc.
The strength of welded joint obtained using the present embodiment is reliable, and surfacing is without impression.
Claims (3)
1. a kind of metal welding methods, this method includes precasting process, the resistance-welding process of protrusion successively, it is characterised in that：
The precasting process of the protrusion is：The welding of prefabricated protrusion use is first determined according to the size of raised (2) and required precision
Then method selects wlding according to the material of determining welding method and No.1 metal material (1), No. two metal materials (5), then
It is welded out raised (2) using arc welding or built-up welding at the place to be welded of No.1 metal material (1), wherein the protrusion (2) is point
Shape structure, basal diameter areK is constant coefficient of the value range in 4-7, and t is No.1 metal material (1), No. two metals
The thickness of relatively thin metal material in material (5)；
The resistance-welding process refers to the No.1 metal material (1) and two that raised (2) will be welded out using resistance welder or soldering turret
The welding of number metal material (5).
2. a kind of metal welding methods according to claim 1, it is characterised in that：It is convex in the precasting process of the protrusion
The penetration rate for playing (2) is 20%-80%, and the height of raised (2) is 1-8mm.
3. a kind of metal welding methods according to claim 1 or 2, it is characterised in that：In the resistance-welding process, resistance
The top electrode (3) of welding machine or soldering turret, lower electrode (4) are flat electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410285506.1A CN105269138B (en) | 2014-06-24 | 2014-06-24 | Metal welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410285506.1A CN105269138B (en) | 2014-06-24 | 2014-06-24 | Metal welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105269138A CN105269138A (en) | 2016-01-27 |
| CN105269138B true CN105269138B (en) | 2018-10-30 |
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| CN201410285506.1A Active CN105269138B (en) | 2014-06-24 | 2014-06-24 | Metal welding method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782355B (en) * | 2016-08-25 | 2021-08-13 | 中国第一汽车股份有限公司 | Sheet metal part detection method based on robot servo welding tongs |
| 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 for manufacturing welded structural member |
Family Cites Families (3)
| 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 |
| US6765170B2 (en) * | 2002-12-17 | 2004-07-20 | General Motors Corporation | Method for single sided spot welding |
| CN102962644B (en) * | 2012-11-26 | 2015-11-25 | 遂宁华能机械有限公司 | Wear-resisting disintegrating machine thin broken roller preparation method |
-
2014
- 2014-06-24 CN CN201410285506.1A patent/CN105269138B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 for manufacturing welded structural member |
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| CN105269138A (en) | 2016-01-27 |
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