JOINING METHOD FOR MEMBERS

摘要

PROBLEM TO BE SOLVED: To suppress lowering in joint strength which is caused by heat. SOLUTION: A non-heat-treated aluminum alloy steel plate which has a small calorific value compared with the second joining member W2 is arranged as a member on a side where a rotation direction R of a rotary tool 1 goes in a traveling direction V to the traveling direction V of the rotary tool 1 of the first joining member W1, and a heat-treated aluminum alloy steel plate which has a large calorific value cam-pared with the first joining member W1 is arranged as a member on a side where the rotation direction R of the rotary tool 1 goes opposite to the traveling direction V to the traveling direction V of the rotary tool 1.