Blank optimization method for controlling machining deformation of long beam parts

The invention discloses a blank optimization method for processing deformation control of long beam parts, which comprises the following steps: S1, selecting samples from different blanks, and detecting the initial residual stress of the samples along the thickness direction; s2, calculating the strain energy density of the blank, and proposing a blank processing safety evaluation standard based on the strain energy density; s3, establishing a solution function of the minimum deformation of the part, analyzing the minimum deformation of the part after all residual blanks are processed, and removing the blanks with the minimum deformation greater than the part processing tolerance; s4, the blank with the minimum thickness is selected from the remaining blanks with the minimum deformation larger than the part machining tolerance; and S5, in the different batches of blanks, the blanks of the corresponding batches with the minimum deformation fluctuation of the parts at different positions are selected as prefera