Polycrystalline material plate frame finish machining method based on internal residual stress nondestructive measurement

The invention provides a polycrystalline material plate frame piece finish machining method based on internal residual stress nondestructive measurement. The problem that deformation is out of tolerance in existing polycrystalline material plate frame piece machining is solved. The method mainly comprises the steps of carrying out nondestructive testing on residual stress and distribution of the residual stress of different parts in a to-be-processed metal plate, marking a residual stress risk area causing deformation out-of-tolerance, designing and processing an envelope surface, calculating the envelope surface with the minimum deformation amount, planning a processing path and cutting the plate in sequence, and measuring and evaluating whether the deformation is out-of-tolerance or not. And the cutting machining process is optimized. The method of testing, theoretical analysis and actual measurement of machining deformation is used for solving the problem, the cost of labor, financial resources, time and t