Method for cryogenic treatment of aluminium alloy 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 low development cost, increased working life, and improved surface quality of solder joints
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[0022] 1. Take 3 pairs / group of cryogenically treated electrodes and 3 pairs / group of electrodes that have not been cryogenically treated;
[0023] 2. The electrode materials are Cu-Cd and Cu-Zr respectively;
[0024] 3. Spot-welded aluminum alloy: the aluminum alloy LF2 cleaned by pickling method is used.
[0025] 4. Process parameters of spot welding: spot welding current 20000A, welding time 0.08s, electrode pressure 2500N, water flow 3 liters / minute;
[0026] 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.
[0027]
Electrode type
Working life (number of solder joints)
Electrodes not cryogenically treated
cryogenic electrode
cryogenic electrode
Cu-Cd
180
300
about 2 times
Cu-Zr
275
600
about 2 times
[0028] The above examples show that after the cr...
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