Rapid measurement and identification method for structural part machining deformation

The invention discloses a rapid measurement and identification method for structural part machining deformation, belongs to the field of machinery, and has the characteristics of high measurement speed, small calculated amount and high measurement precision. The method comprises the steps that firstly, dividing a structural part into N sub-regions, the structures of the sub-regions are equivalentto thin plates, calculating a pure bending deformation function and a pure free torsional deformation function of the sub-regions, and calculating and determining coefficients of the deformation functions after being measured; secondly, setting measuring points on the surfaces of the sub-regions of the freely-placed structural member, and calculating undetermined coefficients of deformation functions of the sub-regions by utilizing least square fitting according to pure bending deformation functions and pure free torsional deformation functions by measuring spatial position data of the measuring points; then establish