At present, the parameters to control the welding deformation of the basic welding joints have been made almost clear and, to some extent, they can be estimated from the welding conditions. However, the welding deformation is expected to depend on welding operators because it is affected by the welding conditions such as welding heat input, leg length, and the restraint of weld joint. Therefore, it is desirable to treat the weld deformations statistically. In this report, as a result of the semiautomatic MAG welding experiment by welding operators having the specified welding skills, the following have been obtained for the angular distortion and transverse shrinkage of the fillet welding tee joint flanges;
(1) The distribution characteristics of the welding heat input and actual leg length when the desired leg length is specified have been made clear.
(2) The distribution characteristics of the angular distortion and transverse shrinkage when the target length is specified have been made clear.
(3) The distribution characteristics of the angular distortion and transverse shrinkage to the welding heat input have come to be presumed from the welding conditions.
