Deformations caused by cutting and edge welding have been measured in order to make clear an equation estimating the deforamation of cutting. The deformation was calculated from distributions of inherent strain obtained from the sequential removal of layers. Many reserachers believed that the deformation of cutting is estimated by the predictive equation for the deformation of edge welding. However, it is shown that deformation occured by cutting is smaller than one of edge welding in the same rise of average temperature. The difference in deformation is caused by thermal cycles in the vicinity of heat souce derived from the cutting process in which melting parts sprays into the air.
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