CN101434002A - Method for improving quality of welding spot - Google Patents
Method for improving quality of welding spot Download PDFInfo
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- CN101434002A CN101434002A CNA2008101866311A CN200810186631A CN101434002A CN 101434002 A CN101434002 A CN 101434002A CN A2008101866311 A CNA2008101866311 A CN A2008101866311A CN 200810186631 A CN200810186631 A CN 200810186631A CN 101434002 A CN101434002 A CN 101434002A
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- Prior art keywords
- welding
- sheet material
- electrode
- welding spot
- weldment
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- 238000003466 welding Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 claims description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 22
- 229910052802 copper Inorganic materials 0.000 claims description 22
- 239000010949 copper Substances 0.000 claims description 22
- 229910000679 solder Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 abstract description 11
- 229910052751 metal Inorganic materials 0.000 abstract description 11
- 238000005476 soldering Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000010009 beating Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
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- Resistance Welding (AREA)
Abstract
The invention provides a method for improving quality of a welding spot. A welding component is attached to the surface of a component to be welded through a clamp, then applies pressure to the component to be welded through a welding gun electrode, and carries out welding by using resistance heat generated when current flows through a contact surface of a joint and an adjacent area. The method is characterized in that a high electric conducting and high heat conducting plate is arranged between the welding component and the welding gun electrode, the plane of the plate is made parallel to the surface of the welding component, and momentary contact of the electrode and the plate is in a vertical state. Through increasing the plate, the electrode does not contact a sheet metal component of a vehicle body any more, but a welding contact area is increased by the high electric conducting and high heat conducting plate, so the method ensures that the heated area of the electrode and the sheet metal component of the vehicle body reaches an ideal state, can effectively improve the appearance quality of the welding spot of the welding component, and saves cost during welding and debugging.
Description
Technical field
The present invention relates to the car load field that is welded, more particularly relate to optimize welding quality, make things convenient for welding quality control, improve the welding quality and the assembling effect of body in white outer surface spare.
Background technology
The solder joint of a coachbuilt body is between 3500～5000 according to statistics, and body of a motor car mainly connects, fixes by these solder joints, and the quality of these solder joints just becomes one of the topmost standard of bus body strength that influences so.Unavoidably have the part solder joint to expose in the outside of interior exterior trim workpiece yet still keep away after the vehicle body assembling is finished, this moment, the presentation quality of these solder joints just became one of factor that influences the moulding of vehicle body overall appearance.
Guarantee in the process of vehicle body assembling that in addition the qualified of solder joint presentation quality also is vital, then can influence assembly manipulation man-hour and assembling effect if produce problems off quality such as solder joint distortion, burr in the process of general assembly assembling inner and outer decorative parts, even cause inner and outer decorative parts to install less than the situation on the vehicle body.
Fig. 1 is a traditional welding process schematic diagram, acts directly on the weldment 1 by upper/ lower electrode 2,3, and weldment 1 is exerted pressure by electrode after fitting by anchor clamps, utilizes electric current to weld by the contact-making surface of joint and the resistance heat of adjacent domain generation.Wherein the heat that produces during spot welding is determined by following formula:
Q＝IIRt(J)————(1)
---the heat of generation (J), I---welding current (A), R---resistance between electrode (ohm), t---weld interval (s) in the formula: Q
Vertical between the upper/lower electrode that requires soldering turret on anchor clamps in the process that car body component welds and the sheet metal component that is welded, can not twist to reach solder joint, reduce the probability of welding slag, burr appearance, but because the vehicle body sheet metal component has many different profiles, therefore being welded on simultaneously has many paws and reference block to interfere to some extent soldering turret on the anchor clamps, will guarantee that the upper/lower electrode of soldering turret in the welding operation process panel beating profile corresponding with each solder joint is very difficult on vertical.
Traditional as can be seen welding manner causes when interfering welding operation at paw and reference block among Fig. 2, or the welding gun type selecting has under the situation of error, can not guarantee that solder joint welding is that electrode is when surperficial vertical with weldment, because the contact area of electrode is determining current density, the out of plumb of electrode and weldment has appreciable impact to the formation and the weldering nuclear shape of nugget in the welding process.
Certainly it is vertical with the weldment surface also to satisfy solder joint to a certain extent by other modes, and such as changing corresponding special-shaped soldering turret, still this mode has increased many costs, and the special-shaped soldering turret that more renews needs the very long cycle.Perhaps the respective pinch mechanism of anchor clamps is adjusted in redesign, but this quadrat method also is that cost is too high and debugging work load is excessive, and these methods all are difficult to satisfy rapidly produces needs.
Summary of the invention
The invention provides a kind of method that can improve the solder joint presentation quality of weldment quickly and easily, thereby effectively improve weldment solder joint presentation quality, save the cost that produces in the welding debug process.
A kind of method that improves quality of welding spot, weldment is exerted pressure by welding gun electrode after fitting to the welded part surface by anchor clamps, utilize electric current to weld by the contact-making surface of joint and the resistance heat of adjacent domain generation, it is characterized in that: the sheet material that a high conduction, high heat conduction are set between weldment and welding gun electrode, the plane that makes sheet material is surperficial parallel with weldment, guarantees that simultaneously the moment that electrode contacts with this sheet material is a plumbness.
Be welded with a connecting plate on the paw of weld jig or reference block, sheet material and this connecting plate are assembled into and can be dynamically connected.Thereby guarantee that the moment that electrode contacts with sheet material is a plumbness.
Described sheet material is copper coin, and thickness is 3～12mm.When the plane that can not guarantee sheet material and weldment surperficial parallel, guarantee to have between sheet material and the weldment surface gap of 1～3mm.
Adopt technical scheme of the present invention, increase sheet material rear electrode no longer directly contacts with the vehicle body sheet metal component but welds contact area by the material increase of this high conduction, high heat conduction, guarantees that the heating surface area of electrode and vehicle body sheet metal component reaches perfect condition.Saved and relied on the work that special-shaped soldering turret remedies the quality of welding spot defective of changing in the past, the corresponding debugging work that has reduced anchor clamps, reduced the welding operation difficulty, quality of welding spot problems such as solder joint distortion have obviously been solved, the welding slag that produces during to welding splashes and also improves significantly, and the vehicle body presentation quality is improved great meaning, and has saved the complicated procedures that more renews soldering turret, can improve the security of quality of welding spot and welding process simultaneously, promote the efficient of debugging clamper.
Description of drawings
Fig. 1: traditional welding process schematic diagram;
Fig. 2: electrode and weldment surface off plumb welding schematic diagram;
Fig. 3: electric resistance welding increases the copper coin schematic diagram.
Fig. 4: increase copper coin method schematic diagram.
Description of reference numerals:
The 1-weldment; 2-welding gun top electrode; 3-welding gun bottom electrode;
4-welding pressure direction; 5-welding pressure direction; The 6-welding current;
The 7-weld nugget; 8-sheet material (copper coin); The 9-connecting plate.
The specific embodiment
As shown in Figure 4, the connecting plate 9 of burn-oning and being used for fixing on corresponding paw of weld jig or reference block with the sheet material 8 of high conduction, high heat conduction, is connected on the connecting plate 9 with bolt and nut as copper coin then.
Be example with copper coin 8 below, the thickness of copper coin 8 is 3～12mm, and the bolts assemblies that connects copper coin is for being dynamically connected, to guarantee that the moment that electrode 2 contacts with copper coin 8 is a plumbness.
As shown in Figure 3, make copper coin 8 during welding between vehicle body panel beating outer surface and welding gun top electrode 2 as weldment 1, the plane that guarantees copper coin 8 simultaneously must be parallel with vehicle body sheet metal component outer surface, if do not guarantee, then guarantees to have between copper coin 8 and the vehicle body sheet metal component gap of 1～3mm.
The second, the surface area of copper coin must be greater than the surface area of 3～5 solder joints, not landing when contacting with copper coin to reach the assurance electrode.
Three, when the solder joint of continuous adjacent appears in vehicle body sheet metal component surface, can make bigger copper coin, on same copper coin, these solder joints be welded.When vehicle body sheet metal component surface is complicated, anchor clamps are interfered when serious, can considers to make less copper coin and solder joint is dispersed on the different copper coins welds.
Four, when the quality of welding spot precision prescribed is high, considering increases copper coin simultaneously on positive and negative two surfaces of sheet metal component, to guarantee quality of welding spot.
Five, welding current must adjust accordingly to guarantee that the quality of welding spot defective that dry joint, rosin joint, puncture etc. cause because of welding parameter does not appear in solder joint behind the increase copper coin.
By maintenance to copper billet surface area cleannes, can reduce splashing of electrode generation, reduce the loss of electrode, reduce the unsafe factor that produces in the welding operation process.
Claims (8)
1, a kind of method that improves quality of welding spot, weldment (1) is exerted pressure by welding gun electrode (2,3) after fitting to the welded part surface by anchor clamps, utilize electric current (6) to weld by the contact-making surface of joint and the resistance heat of adjacent domain generation, it is characterized in that: the sheet material (8) that a high conduction, high heat conduction are set between weldment (1) and welding gun electrode, the plane that makes sheet material is surperficial parallel with weldment, guarantees that simultaneously the moment that electrode contacts with this sheet material is a plumbness.
2, the method for raising quality of welding spot as claimed in claim 1 is characterized in that: sheet material (8) is assembled into and can be dynamically connected by bolt and nut and weld jig, thereby guarantees that the moment that electrode (2) contacts with sheet material (8) is a plumbness.
3, the method for raising quality of welding spot as claimed in claim 2 is characterized in that: be welded with a connecting plate (9) on the paw of weld jig or reference block, sheet material (8) is assembled into and can be dynamically connected with this connecting plate (9).
4, as the method for each described raising quality of welding spot of claim 1-3, it is characterized in that: described sheet material (8) is copper coin, and thickness is 3～12mm.
5, as the method for each described raising quality of welding spot of claim 1-4, it is characterized in that: when the plane that can not guarantee sheet material (8) and weldment (1) surperficial parallel, guarantee to have between sheet material (8) and weldment (1) surface gap of 1～3mm.
6, as the method for each described raising quality of welding spot of claim 1-5, it is characterized in that: make the surface area of the surface area of sheet material (8), to guarantee electrode and sheet material (8) not landing when contacting greater than 3～5 solder joints.
7, as the method for each described raising quality of welding spot of claim 1-6, it is characterized in that: when the solder joint of continuous adjacent appears in weldment (1) surface, adopt bigger sheet material (8), go up at same sheet material (8) these solder joints are welded.
8, as the method for each described raising quality of welding spot of claim 1-7, it is characterized in that: when the quality of welding spot precision prescribed is high, increase sheet material (8) simultaneously on positive and negative two surfaces of weldment, to guarantee quality of welding spot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101866311A CN101434002A (en) | 2008-12-11 | 2008-12-11 | Method for improving quality of welding spot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101866311A CN101434002A (en) | 2008-12-11 | 2008-12-11 | Method for improving quality of welding spot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101434002A true CN101434002A (en) | 2009-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101866311A Pending CN101434002A (en) | 2008-12-11 | 2008-12-11 | Method for improving quality of welding spot |
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| Country | Link |
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| CN (1) | CN101434002A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102366855A (en) * | 2011-10-18 | 2012-03-07 | 奇瑞汽车股份有限公司 | Welding spot protective device |
| CN102430851A (en) * | 2010-09-08 | 2012-05-02 | 富士重工业株式会社 | Spot-welding method and spot-welding device |
| CN104411441A (en) * | 2012-06-29 | 2015-03-11 | 株式会社神户制钢所 | Spot welding method |
| CN107262892A (en) * | 2017-06-16 | 2017-10-20 | 建科机械（天津）股份有限公司 | A kind of bar-mat reinforcement welds main frame |
| CN110125526A (en) * | 2019-04-26 | 2019-08-16 | 西安交通大学 | A kind of eyelet pointing titanium valve electric resistance welding method of molybdenum strainer laminated construction |
-
2008
- 2008-12-11 CN CNA2008101866311A patent/CN101434002A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430851A (en) * | 2010-09-08 | 2012-05-02 | 富士重工业株式会社 | Spot-welding method and spot-welding device |
| CN102430851B (en) * | 2010-09-08 | 2015-06-03 | 富士重工业株式会社 | Spot-welding method and spot-welding device |
| CN102366855A (en) * | 2011-10-18 | 2012-03-07 | 奇瑞汽车股份有限公司 | Welding spot protective device |
| CN102366855B (en) * | 2011-10-18 | 2015-04-29 | 奇瑞汽车股份有限公司 | Welding spot protective device |
| CN104411441A (en) * | 2012-06-29 | 2015-03-11 | 株式会社神户制钢所 | Spot welding method |
| CN104411441B (en) * | 2012-06-29 | 2017-05-24 | 株式会社神户制钢所 | Spot welding method |
| CN107262892A (en) * | 2017-06-16 | 2017-10-20 | 建科机械（天津）股份有限公司 | A kind of bar-mat reinforcement welds main frame |
| CN110125526A (en) * | 2019-04-26 | 2019-08-16 | 西安交通大学 | A kind of eyelet pointing titanium valve electric resistance welding method of molybdenum strainer laminated construction |
| CN110125526B (en) * | 2019-04-26 | 2020-08-18 | 西安交通大学 | Resistance welding method for molybdenum filter screen laminated structure by filling titanium powder into holes |
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Open date: 20090520 |