| 摘要 |
A C-type frame is movable in a direction in which the C-type frame is adjacent to and away from a workpiece having an outer panel and an inner panel assembled with each other. After the C-type frame is advanced and a pre-hemming punch is advanced by a swing cylinder provided at the C-type frame, a hemming die is raised by a lifter hydraulic cylinder provided on a lower portion of the C-type frame and a flange of the outer panel is provisionally hemmed. Then, after retreat of the pre-hemming punch following lowering of the hemming die, the hemming die is raised again and final hemming is conducted between the hemming die and the hemming punch.
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