Method of forming a joint between aluminum workpieces with curab

Details Method of forming a joint between aluminum workpieces with curab Method of forming a joint between aluminum workpieces with curab

1988-05-12

1990-05-08

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

B23K 1118

Patent

active

049240579

ABSTRACT:
The invention concerns a method of forming a joint between aluminium workpieces. These carry an artifically applied e.g. chromate or anodic oxide coating on their surface. A curable adhesive containing up to 40% by weight of particulate filler having a maximum particle size of 300 microns is provided between the workpieces to be joined. Resistance welding is performed using a welding electrode whose tip has a surface with an average roughness depth of at least 10 microns. This increases electrode life and makes it possible to use lower welding currents than previously recommended.

REFERENCES:
patent: 4591687 (1986-05-01), Urech
patent: 4633054 (1986-12-01), Patrick et al.
patent: 4661675 (1987-04-01), Guthrie et al.
"Guidelines to Resistance Spot Welding Aluminum Automotive Sheet" the Aluminum Association, Inc.

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