Deformation reform device and deformation reform manner

摘要

The present invention provides an insertion clamp apparatus and a straightening apparatus and a straightening method for straightening an opening part which is deformed in the radial direction of a workpiece (7). The insertion clamp apparatus (6) is inserted into an opening part (71) of a workpiece (7) for straightening the deformed opening part (71), an insertion part (61) and a minor diameter part (63) are positioned from one side of the insertion clamp apparatus (6) inserted into the opening part (71) in sequence and the periphery surface is conical in a formation that the insertion part (61) increases the external diameter of the insertion clamp apparatus (6) gradually from one side of the insertion clamp apparatus inserted into the opening part (71), the maximum outside diameter of the insertion part (61) is bigger than the interior diameter of the opening part (71), and the diameter of the minor diameter part (63) is smaller than the interior diameter of the opening part (71).