PRODUCTION OF LASER WELDED PARTS

摘要

PROBLEM TO BE SOLVED: To omit stages for washing, shape management and press fitting load management necessary for press fitting work by plastically deforming the ends of metallic parts on an inner side or outer side and cold plastically bonding these ends as a tack welding method of the metallic parts to be bonded by laser welding. SOLUTION: The upper part of a plunger rod 2 is inserted into the bore part of an anchor 1 and the flange part of the rod 2 is bonded by laser welding 3. A die is embedded into the guide of metal molds so as to sandwich the plunger rod 2 and the anchor 1 is inserted into the upper flange part of the plunger rod 2 in order to tack weld these parts. A punch is then slidably inserted to comply with the bore of the guide. The part 4 near the fitting part at the top end of the plunger rod 2 is locally pressurized by the punch to induce plastic flow. The part 4 near the fitting part cold plastically bonds the anchor 1 and the plunger rod 2 as the top end of the plunger rod 2 induces plastic deformation in the outer diametral direction and compresses the bore part of the anchor 1.