PROBLEM TO BE SOLVED: To prevent generation of defect in external appearance by arranging a difference in levels to a hem bending part of thick plate side and coinciding a hem bending curvature of thick plate side to a hem bending part of thin plate side so as to eliminate unevenness of an clearance, etc., whenever there is a difference in plate thicknesses. ;SOLUTION: At the side of a thin plate panel Pi2 of inner panel Pi, pressing is executed with using a hem pad 2 arranged with a normal flat plane shaped pressing face, the curvature radius R2 of hem bending part is turned to t2/2+t3. On the other hand, at the side of a thick plate panel Pi1, because a difference in level part 2a corresponding to a plate thickness difference t1-t2 between the thick plate panel Pi1 and thin plate panel Pi2 is formed t the pressing face of a hem pad 2, the curvature radius R1 of hem bending part, resulting from that a tip part is crushed by the difference in levels part 2a of hem pad 2 to form a difference in levels D, is turned to t2/2+t3, that is equal to the curvature radius R2 of thin plate side. Thus, unevenness of clearance and incontinuousness of hemming part are eliminated.;COPYRIGHT: (C)1998,JPO
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