| 摘要 |
PURPOSE:To prevent jumping by controlling press-welding time, rotation and frictional pressure so as to change the same in conformity with the kind, shape and size of the material to be press-welded and press welding the materials while the frictional torque and twisting allowance generated on the friction surfaces near the friction surfaces to be press-welded are non-steady. CONSTITUTION:Two materials to be press-welded are rotated relatively and the two materials are press-welded in the axial direction of rotation to fluidize plastically the material in the joint part by the friction heat thereof by which the two materials are joined. The press-welding time, rotating speed and frictional pressure are controlled so as to be freely changed in conformity with the kind, shape and size of the materials to be press-welded in said press-welding stage. The rotation is stopped and press contact force is exerted to the materials to fluidize plastically said materials while the frictional torque and twisting allowance generated on the firction surfaces near the friction surfaces to be press- welded are non-steady, by which the change in the fiber direction of the material in the press-welding part is made gentle. |
