| 摘要 |
PROBLEM TO BE SOLVED: To suppress the occurrence of spring-back by uniformizing the working density of each inclined surface even when steeply inclined surfaces of a large forming angle and gently inclined surfaces of a small forming angle coexist. SOLUTION: Gently inclined surfaces 3 of a small forming angle and steeply inclined surfaces 4 of a large forming angle are made to coexist on a surface 2 which is sequentially formed from a plate 1 by a bar-shaped pressing member 5. The sequential forming is performed by repeatedly and continuously depicting one contour line 6 by the bar-shaped pressing member 5 and again depicting the contour line after performing the relative movement of the bar-shaped pressing member 5 in the direction shown in the figure at a predetermined height pitch. The height pitch is small on the gently inclined surfaces 3 of a small forming angle and large on the steeply inclined surfaces 4 of a large forming angle. The transverse pitch of each inclined surface is uniformized, and spring-back is hardly caused. COPYRIGHT: (C)2003,JPO
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