| 摘要 |
PURPOSE:To reduce the area (product of width and pitch) of a steel plate required for working and to reduce the cost of the titled frame by providing a slit between the forming parts of each frame of a steel plate material in a sequential feeding frame working method, and applying drawing, forming, and blanking on the frame. CONSTITUTION:In the sequential feeding frame working method, the slit 29 is provided on the steel plate 15 instead of the hole of blanking 16 to reduce the width of the hole of the blanking 16 as far as possible. By adopting such constitution, it is possible to reduce the width 18 and the pitch 17 of the steel plate 15 for the size of the frame 1, and to improve the material yield of the steel plate 15. Thus, by providing the slit 20 instead of the hole of the blanking 16 for drawing, the slit 20 is spreaded by the lead-in of a material at the time of applying the drawing, and it is possible to apply the drawing by performing the role of the hole of the blanking 16 without generating any rupture of the steel plate 15.
|
