Coating stripping detection method of coating plate

The invention discloses a coating stripping detection method of a coating plate and belongs to the technical field of coating detection of coating plates. The method comprises the following process steps: shearing the coating plate to obtain a disc sample, checking and cleaning molds and a test device, performing a trial test to determine a reasonable blank holder force, pressing the disc sample between a concave mold and a blank holder, starting a convex mold to perform deep drawing for shaping after the blank holder force is applied, stripping a coating under the action of a shear force through the drawing deformation of the sample and the action of friction between the sample and the mold, and evaluating the coating stripping degree of the coating plate. The method has the advantages that the coating stripping degree of automobile plates, home appliance plates, building slabs and other coating plates can be rapidly and accurately detected, and the method is suitable for industrial wide application.