CN102069284B - Method for composite spot welding of galvanized plate and stainless steel plate - Google Patents
Method for composite spot welding of galvanized plate and stainless steel plate Download PDFInfo
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- CN102069284B CN102069284B CN 201110028353 CN201110028353A CN102069284B CN 102069284 B CN102069284 B CN 102069284B CN 201110028353 CN201110028353 CN 201110028353 CN 201110028353 A CN201110028353 A CN 201110028353A CN 102069284 B CN102069284 B CN 102069284B
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Abstract
The invention discloses a method suitable for the composite spot welding of a galvanized plate and a stainless steel plate, which takes a resistance spot welding machine as welding equipment, and the galvanized plate and stainless steel plate the thickness of which is in the range of 0.5-2.5mm as processing objects. The method provided by the invention successively comprises the following steps: carrying out surface cleaning; carrying out baking treatment; overlapping and combining the galvanized plate with the stainless steel plate; and welding through spot welding, thus, the diameter d1 of a first electrode end of the spot welding in contact with the galvanized plate is larger than the diameter d2 of a second electrode end in contact with the stainless steel plate. The invention is mainly characterized in that the utilized welding current is 10-20% higher than the standard current of the resistance spot welding machine, and the invention has the characteristics of simple and reasonable method, no damage to the surfaces of the galvanized plate and the stainless steel plate, good welding quality and the like.
Description
Technical field
The present invention relates to a kind of method that is applicable to galvanized sheet and the compound spot welding of corrosion resistant plate, belong to solder technology.
Background technology
The product of modern steel enterprise is expanded to flat cold-rolled sheet, galvanized sheet and colored steel, uses the demand of plate with plate and household electrical appliances to satisfy growing high-quality automobile.
Manufacturing enterprise saves in the process of production cost when promoting product quality, be specifically related to the composite welding of a large amount of galvanized sheet and corrosion resistant plate, such as furnace shell of color coating line etc., make its corrosion resistant plate inwall have resistant to elevated temperatures ability, and its galvanized sheet outer wall have corrosion resistance and aesthetic in appearance.For this reason, present suchlike product or product all are to adopt the method for corrosion resistant plate inwall and galvanized sheet outer wall composite welding to prepare.
Yet the thickness of the common corrosion resistant plate that adopts and galvanized sheet is all thinner, and its thickness is in 1 ~ 2mm scope, and its welding method adopts is traditional spot-welded on method, so that in actual production process, has produced many particular problems.The particular problem that produces has following 3 points at least: the one, and the galvanized sheet at solder joint place burns or produces the plating zinc on surface pull-up to fall easily, thereby very easily produces corrosion and directly influence its outward appearance burning or break away from the position; The 2nd, there is the tempering impression at corrosion resistant plate solder joint place, thereby easily produces corrosion; The 3rd, welding deformation is bigger, and postwelding needs to proofread and correct, thereby directly influences production efficiency and aesthetic in appearance.And usually adopt coating at the galvanized sheet place that comes off to be coated with the way of mending antirust paint, overcome the deficiency of corrosion, but this way not only influences product appearance, and the time-consuming increase production cost of taking a lot of work.Especially at the tempering impression place of corrosion resistant plate, being coated with and mending antirust paint is the effect that do not have of no avail under hot conditions.
For this reason, research and develop a kind of welding method that can overcome the prior art deficiency, just become general in the industry expectation.
Summary of the invention
The present invention aims to provide the existing resistance spot weld of a kind of employing and welding conditions thereof, and can not produce that galvanized sheet spot welding place is burnt or the plating zinc on surface pull-up from, corrosion resistant plate spot welding place can not produce the tempering impression, welding method is easy rationally, the method that is applicable to galvanized sheet and the compound spot welding of corrosion resistant plate that welding quality is good is to overcome the deficiency of prior art.
Realize the technical though of the object of the invention, the one, according to the physical and chemical performance of galvanized sheet and corrosion resistant plate, by adopt with galvanized sheet electrodes in contact termination diameter greater than with the frame mode of corrosion resistant plate electrodes in contact termination diameter, make it the operating current (magnitude of current of unit are) with galvanized sheet electrodes in contact termination, less than with the operating current of corrosion resistant plate electrodes in contact termination, and under the condition of the rated operational current that meets the corrosion resistant plate welding requirements that resistance spot weld is exported, reduce the welding heat energy that produces with galvanized sheet electrodes in contact termination, effectively to avoid being burnt of galvanized sheet or coming off of zinc coat; The 2nd, under the condition of resistance spot weld welding conditions (described welding conditions are providing with the machine by resistance spot weld manufacturer) rated operational current, suitably strengthen its operating current (improving 10 ~ 20%), with its spot welding time of suitable shortening, avoid corrosion resistant plate spot welding place to produce the tempering impression, thereby fundamentally guarantee its welding quality, realize purpose of the present invention.
Based on above-mentioned technical though, the present invention realizes that the technical scheme of its purpose is:
A kind of method that is applicable to galvanized sheet and the compound spot welding of corrosion resistant plate, be welding equipment with the resistance spot weld, be processing object with galvanized sheet and the corrosion resistant plate of thickness in 0.5 ~ 2.5mm scope, in turn include the following steps: the surface clean of galvanized sheet and corrosion resistant plate, oven dry preliminary treatment; Pretreated galvanized sheet and corrosion resistant plate are required overlapping being combined with each other according to product design; Adopt resistance spot weld, by technological requirement the galvanized sheet and the corrosion resistant plate that are combined with each other are implemented spot-welded on, its innovative point is:
The diameter of a, first electrode tip that contacts with galvanized sheet is greater than the diameter of second electrode tip that contacts with corrosion resistant plate;
B, described resistance spot weld standard welding current the basis on, the welding job electric current is heightened 10 ~ 20%.
Can be understood by above given technical scheme, technical scheme imbody of the present invention the technical though of above-mentioned its purpose of realization, thereby realized its purpose that will realize.
The present invention also advocates, when galvanized sheet and corrosion resistant plate need weld, the joint of described galvanized sheet and corrosion resistant plate was joint form and connects.
The present invention is according to repeatedly testing repeatedly and contrasting, be familiar with and galvanized sheet electrodes in contact termination diameter, with with the relation of corrosion resistant plate electrodes in contact termination diameter, it is the diameter of described first electrode tip that contacts with galvanized sheet, relation with the second electrode tip diameter that contacts with corrosion resistant plate, satisfy following calculating formula:
d
1＝1.2~2.0×
×d
2
In the formula: δ
1Be the thickness of galvanized sheet (1), and its thickness is in 0.5 ~ 2.5mm scope;
δ
2Be the thickness of corrosion resistant plate (2), and its thickness is in 0.5 ~ 2.5mm scope;
And 0.5≤δ
2/ δ
1≤ 2.
Under the condition of above-mentioned calculating formula, can calculate the diameter with galvanized sheet electrodes in contact termination according to the thickness of existing resistance spot weld electrode tip diameter (namely with corrosion resistant plate electrodes in contact termination diameter) and galvanized sheet and corrosion resistant plate.
After technique scheme was implemented, all following characteristics of the present invention were apparent:
1. postwelding galvanized sheet plating zinc on surface layer can not come off, and surface-brightening is not seen solder joint as before, more can not burnt.
2. corrosion resistant plate surface and galvanized sheet surface, equal solderless takes back the brand trace.
3. strength of welded joint is solid and reliable, and by the tearing test, welded unit is bent to 90 °, and solder joint does not all ftracture.
4. the welded unit surfacing after the welding is attractive in appearance.
Description of drawings
Fig. 1 is Fundamentals of Welding figure of the present invention.
The specific embodiment
One of specific embodiment, as shown in Figure 1.
A kind of method that is applicable to galvanized sheet and the compound spot welding of corrosion resistant plate, be welding equipment with the resistance spot weld, be processing object with galvanized sheet 1 and the corrosion resistant plate 2 of thickness in 1 ~ 2mm scope, in turn include the following steps: the surface clean of galvanized sheet 1 and corrosion resistant plate 2, oven dry preliminary treatment; Pretreated galvanized sheet 1 and corrosion resistant plate 2 are required overlapping being combined with each other according to product design; Adopt resistance spot weld, by technological requirement the galvanized sheet 1 and the corrosion resistant plate 2 that are combined with each other are implemented spot-welded on, and the diameter d of first electrode, 3 terminations that it contacts with galvanized sheet 1
1, greater than the diameter d of second electrode, 4 terminations that contact with corrosion resistant plate 2
2
Described resistance spot weld standard welding current the basis on, the welding job electric current is heightened 10 ~ 20%.
When galvanized sheet 1 and corrosion resistant plate 2 needs welding, the joint of described galvanized sheet 1 and stainless plate 2 all adopts joint form to connect.
Wherein, the diameter d of described first electrode, 3 terminations that contact with galvanized sheet 1
1=11mm; The diameter d of second electrode, 4 terminations that contact with corrosion resistant plate 2
2=6mm.The thickness δ of the galvanized sheet 1 of this specific embodiment
1Be 1 mm, the thickness δ of corrosion resistant plate 2
2Be 2 mm.
Two of the specific embodiment, as shown in Figure 1.
A kind of method that is applicable to galvanized sheet and the compound spot welding of corrosion resistant plate, be welding equipment with the resistance spot weld, be processing object with galvanized sheet 1 and the corrosion resistant plate 2 of thickness in 0.5 ~ 2.5mm scope, in turn include the following steps: the surface clean of galvanized sheet 1 and corrosion resistant plate 2, oven dry preliminary treatment; Pretreated galvanized sheet 1 and corrosion resistant plate 2 are required overlapping being combined with each other according to product design; Adopt resistance spot weld, by technological requirement the galvanized sheet 1 and the corrosion resistant plate 2 that are combined with each other are implemented spot-welded on, and its:
The diameter d of first electrode, 3 terminations that contact with galvanized sheet 1
1, greater than the diameter d of second electrode, 4 terminations that contact with corrosion resistant plate 2
2
B, described resistance spot weld standard welding current the basis on, the welding job electric current is heightened 10 ~ 20%.
When galvanized sheet 1 and corrosion resistant plate 2 needs welding, the joint of described galvanized sheet 1 and corrosion resistant plate 2 all adopts joint form to connect.
Wherein, the diameter d of described first electrode, 3 terminations that contact with galvanized sheet 1
1=8mm; The diameter d of second electrode, 4 terminations that contact with corrosion resistant plate 2
2=6mm.The thickness δ of the galvanized sheet 1 of this specific embodiment
1Be 2 mm, the thickness δ of corrosion resistant plate 2
2Be 1 mm.
Adopt the color coating line oven shell of spot welding method of the present invention preparation, on probation more than 1 year on No. 2 color coating lines of certain steel mill at home, do not find that zinc coat comes off or problem such as solder joint disengagement, operation conditions is very good always.
The scope of application of the present invention, the restriction that not described by this specification.
Claims (3)
1. method that is applicable to galvanized sheet and the compound spot welding of corrosion resistant plate, be welding equipment with the resistance spot weld, be processing object with galvanized sheet (1) and the corrosion resistant plate (2) of thickness in 0.5 ~ 2.5mm scope, in turn include the following steps: the surface clean of galvanized sheet (1) and corrosion resistant plate (2), oven dry preliminary treatment; Pretreated galvanized sheet (1) and corrosion resistant plate (2) are required overlapping being combined with each other according to product design; Adopt resistance spot weld, by technological requirement the galvanized sheet (1) and the corrosion resistant plate (2) that are combined with each other implemented spot-welded on, it is characterized in that:
Diameter (the d of first electrode (3) termination that a. contacts with galvanized sheet (1)
1), greater than the diameter (d of second electrode (4) termination that contacts with corrosion resistant plate (2)
2);
B. described resistance spot weld standard welding current the basis on, the welding job electric current is heightened 10 ~ 20%.
2. the method that is applicable to galvanized sheet and the compound spot welding of corrosion resistant plate according to claim 1, it is characterized in that, when galvanized sheet (1) and the welding of corrosion resistant plate (2) needs, the joint of described galvanized sheet (1) and corrosion resistant plate (2) is joint form and connects.
3. the method that is applicable to galvanized sheet and the compound spot welding of corrosion resistant plate according to claim 1 is characterized in that, the diameter (d of described first electrode (3) termination that contacts with galvanized sheet (1)
1), with second electrode (4) termination diameter (d that contacts with corrosion resistant plate (2)
2) relation, satisfy following calculating formula:
d
1＝1.2~2.0×
×d
2
In the formula: δ
1Be the thickness of galvanized sheet (1), and its thickness is in 0.5 ~ 2.5mm scope;
δ
2Be the thickness of corrosion resistant plate (2), and its thickness is in 0.5 ~ 2.5mm scope;
And 0.5≤δ
2/ δ
1≤ 2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110028353 CN102069284B (en) | 2011-01-26 | 2011-01-26 | Method for composite spot welding of galvanized plate and stainless steel plate |
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|---|---|---|---|
| CN 201110028353 CN102069284B (en) | 2011-01-26 | 2011-01-26 | Method for composite spot welding of galvanized plate and stainless steel plate |
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| CN102069284A CN102069284A (en) | 2011-05-25 |
| CN102069284B true CN102069284B (en) | 2013-07-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014208377A (en) * | 2013-03-29 | 2014-11-06 | シロキ工業株式会社 | Method for welding galvanized steel sheet and raw steel sheet, and method for welding vehicular door sash |
| CN106425070B (en) * | 2016-12-07 | 2018-10-19 | 上汽大众汽车有限公司 | The welding method of galvanized steel plain sheet |
| CN108581159B (en) * | 2018-04-28 | 2020-06-02 | 东北大学 | Welding method of stainless steel plate for thermal neutron shielding |
| CN113146007B (en) * | 2021-04-27 | 2022-09-13 | 东风柳州汽车有限公司 | Method and device for determining welding lap amount of resistance spot welding |
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2011
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| CN1128192A (en) * | 1994-11-08 | 1996-08-07 | 渡边统市 | Automatic assemblying system of galvanized steel sheet by spot welding |
| US5793011A (en) * | 1994-11-08 | 1998-08-11 | Toichi Watanabe | Automatic assembling system of galvanized steel sheet by spot welding |
| CN1435505A (en) * | 2002-01-30 | 2003-08-13 | 天津大学 | Method for cryogenic treatment of galvanized steel sheet resistance spot welding electrode |
| JP2005088029A (en) * | 2003-09-16 | 2005-04-07 | Nissan Motor Co Ltd | Spot welding method and device for galvanized steel sheet |
| CN1586784A (en) * | 2004-08-12 | 2005-03-02 | 上海交通大学 | Once flattening and energy storage capacitor welding method for broad band type thin steel plate connection |
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