Heat treatment and machining is a very important in Transformer corrugated fin wall making machine manufacturing process. transformer tank wall machine body be heat treated What is Welding Stress and Welding Deformation? Welding stress is the internal stress existing in the weldment during and after the welding process. Welding deformation is the change of weld size caused by welding. Which reasons cause Welding Stress and Deformation? 1. Non-uniform Heating of Welds (1) The stress and deformation of unconstrained rods during uniform heating belong to free deformation, so there will be no internal stress during heating and no residual stress and deformation after cooling. (2) The stress and deformation of the restrained bar under uniform heating. If the heating temperature is higher and reaches or exceeds the material yield point temperature (T>TS=600), compressive plastic deformation will occur in the bar. The internal deformation consists of elastic deformation and