Long beam part machining method based on technological process structure optimization design

The invention discloses a long beam type part machining method based on technological process structure optimization design. The long beam type part machining method comprises the following steps that S1, a long beam type part machining deformation analysis theoretical model is established, cross section discretization and unit division are conducted, and the expected deformation amount of a final part and the expected deformation amount of a technological process structure are calculated; s2, establishing a technological process structure section optimization model, reversely analyzing the part machining process, taking the minimum difference between the expected deformation of the technological process structure and the expected deformation of a final part as an objective function, taking section unit distribution as an optimization variable, and proposing the technological process structure optimization model and a solving method; optimal design of the structural section in the technological process is ach