Method for cryogenic treatment of galvanized steel sheet resistance spot welding electrode
A technology of cryogenic treatment and resistance spot welding, applied in the direction of electrode characteristics, welding medium, welding equipment, etc., to achieve the effects of being conducive to environmental protection, improving working life and low development cost
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[0021] 1. Take 3 pairs / group of cryogenically treated electrodes and 3 pairs / group of electrodes that have not been cryogenically treated;
[0022] 2. The electrode materials are Cu-Cr and Cu-Cr-Zr respectively;
[0023] 3. Spot-welded galvanized steel sheet: The spot-welded galvanized steel sheet is a hot-dip galvanized steel sheet. The spot welding performance of this steel sheet is poorer among various galvanized steel sheets, and the splash is also larger, so the use of this steel sheet is more targeted , plate thickness δ=0.8mm;
[0024] 4. Process parameters of spot welding: spot welding current 10050A, welding time 0.1s, electrode pressure 2500N, water flow 3 liters / minute;
[0025] 5. See Table 2 for the comparison results of the working life of the spot welding cryogenic electrode of the present invention and the spot welding electrode of the prior art.
[0026]
Electrode type
Working life (number of solder joints)
Electrodes not cryoge...
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