Machining method for eliminating buckling deformation of sheet parts

The invention relates to a machining method for eliminating buckling deformation of a thin plate type part. The problem of machining deformation existing in an existing machining method is solved. The method comprises the following steps: firstly, analyzing the stress condition of a part milling molded surface, milling a stress groove in the milling molded surface according to the stress condition, longitudinally and indirectly cutting a material and dividing an internal stress module by the stress groove according to a composite angle molded surface, dividing the internal force of the molded surface into independent small composite molded surfaces, and reducing stress concentration to generate film force; then, an end face milling cutter is adopted for cutting the molded surface, the feeding direction of the cutter is perpendicular to the direction of the stress groove, transverse shearing force generated by milling the molded surface and transverse shearing force of the stress groove counteract each other,