Resistance spot welding method for welding plate group

A technology for resistance spot welding and welding of plates, applied in resistance welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of short electrode life and LME cracks on the surface of welded joints of coated steel plates, so as to improve electrode life and avoid LME. Cracks, the effect of saving welding time
CN113134671AActive Publication Date: 2021-07-20SHOUGANG CORPORATION
9 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHOUGANG CORPORATION
Publication Date
2021-07-20

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a resistance spot welding method for a coated steel plate, and is applied to welding of a resistance spot welding device on a welding plate group. The method comprises the following steps that first-section welding is conducted on the welding plate group by adopting a first current to form a welding nugget with an initial diameter on the welding plate group, the first current being smaller than a maximum welding current; and after first interval time, a second current is adopted for conducting second-section welding with a duration being preset time on the welding plate group, so that a diameter of the welding nugget is increased to a target diameter, the target diameter being smaller than a maximum nugget diameter, the preset time being welding time required when welding is conducted by using the maximum welding current so as to enable the formed nugget to reach the target diameter, and the second current being smaller than the maximum welding current. According to the method, a welding process has a lower welding temperature and shorter high-temperature retention time, and the technical problems that in the prior art, the service life of an electrode is short, and LME cracks exist on the surface of a welding spot of the coated steel plate are solved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The present invention relates to the technical field of resistance spot welding, and more particularly to a resistance spot welding method of a weld plate group. Background technique

[0002] Resistance spot welding is to fit the solder into a lap joint, and press the upper and lower electrodes (usually, the upper and lower electrodes are identical), and the material is used to melt the material metal to form a solder joint resistance welding. method. Spot welding is mainly used for thin plate welding, and has a wide range of applications in industries such as automobiles, home appliances.

[0003] With the increasing corrosion resistance of the modern manufacturing, the application range of galvanized plates, galvanized iron alloy steel plates, galvanized aluminum magnesium steel plates and other welding plates are gradually expanded. The main problems faced by the weld plate resistance point welding include:

[0004] 1) Short electrode life; 2) The surfac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More