摩擦圧接挙動による継手性能の評価と最適圧接条件の選定 : 摩擦圧接における圧接条件の最適化と継手性能に関する研究(第2報)

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This paper discussed the posibility of selection of optimum welding condition by adopting the estimating equation for welding consisting of some welding behaviours to responce surface method using a 12 mm diameter SUS304 stainless steel. First, by analysing the relation between the welding behaviour and the tensile strength of welded joint using multiple regression analysis, an estimating equation for welding capable to estimate non-destructively was obtained. Next, by setting up the joining evaluation value obtained by the estimating equation for welding as a dependent variable and the welding condition as an independent variable, the optimum welding condition was selected using the responce surface method, namely, the posibility of selection of optimum welding condition without tensile strength was confirmed. The optimum welding condition obtained was the friction pressure P_1=30 MPa, the upset pressure P_2=170 MPa, the friction time t_1=3.5 s and the rotating speed N=2425 rpm, and the joint efficiency was 102% with a satisfaction.
1998-02-05