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Resistance spot welding device and method for unequal thickness plate

A technology of resistance spot welding and thick plates, which is applied in the direction of resistance welding equipment, pressure electrodes, electrode characteristics, etc., can solve problems affecting joint connection strength, weld nugget offset, etc., to improve nugget offset phenomenon, increase The effect of analyzing heat and increasing the current density

Inactive Publication Date: 2020-04-17
JILIN UNIV
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Problems solved by technology

[0004] The object of the present invention is to provide a resistance spot welding device and method for unequal thickness plates, which solves the problem that the above-mentioned traditional unequal thickness plate spot welding process easily leads to nugget shift of the weldment and thus affects the joint connection strength

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  • Resistance spot welding device and method for unequal thickness plate
  • Resistance spot welding device and method for unequal thickness plate
  • Resistance spot welding device and method for unequal thickness plate

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Embodiment Construction

[0033] The detailed content of the present invention and its specific implementation will be further described below in conjunction with the accompanying drawings.

[0034] see Figure 1 to Figure 3 As shown, the resistance spot welding device and method of the unequal thick plate of the present invention comprise small cross-section equal pressure annular cross-section copper electrode, circular cross-section copper electrode, workpiece thin plate and workpiece thick plate; Wherein, small cross-section equal pressure annular cross-section copper The electrode is composed of a copper electrode part and a ceramic part; when welding, use a small cross-section equal-pressure annular cross-section copper electrode on the thin plate side of the workpiece, and use a circular cross-section copper electrode on the thick plate side of the workpiece; by increasing the current density of the thin plate of the workpiece, increase the current density of the thin plate of the workpiece Heat...

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Abstract

The invention relates to a resistance spot welding device and method for an unequal thickness plate, and belongs to the field of resistance spot welding. The resistance spot welding device comprises asmall-section equal-pressure annular section copper electrode, a circular-section copper electrode, a workpiece sheet and a workpiece thick plate; the small-section equal-pressure annular section copper electrode is composed of a copper electrode part and a ceramic part; during welding, the small-section equal-pressure annular section copper electrode is used on the workpiece sheet, and the circular-section copper electrode is used on the workpiece thick plate; the current density of the workpiece sheet is increased, so that the heat segregation of the workpiece sheet is increased; and partial ceramic materials are used on an electrode of the sheet, so that heat generation of the workpiece sheet is reduced, and therefore the fusion core center offset is avoided. Meanwhile, the ceramic materials are used to enable the upper electrode and the lower electrode to have the same diameter, the pressure is reduced, the welding deformation is reduced, and the surface of a welding spot is smoother.

Description

technical field [0001] The invention relates to the field of resistance spot welding, in particular to a resistance spot welding device and method for unequal thickness plates. Background technique [0002] Faced with increasingly complex industrial production requirements, spot welding between plates of unequal thickness has gradually become a widely used welding process. The traditional spot welding method of unequal thickness plates is limited by the misalignment of the joint surface and the geometric center plane of the two weldments, and the problem of nugget offset often occurs. In actual production, the spot welding nuggets of unequal thick plates tend to be biased towards the thick plate side, which greatly reduces the penetration rate of the thin plate side and seriously affects the bearing capacity of the solder joints. If the penetration rate of the thin plate side is lower than the production specified value, it may bring a huge safety hazard to the product. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/11B23K11/30B23K11/36
CPCB23K11/115B23K11/3009B23K11/36
Inventor 徐国成王心笛董娟尤小龙谷晓鹏
Owner JILIN UNIV
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