| 摘要 |
According to the present invention, a progressive metallic mold for drawing works produces a hollow column type part of which a top and a bottom have different thickness through drawing works; reduces shock lines and scratches; and improves an efficiency and uniformity of forming. The progressive metallic mold for drawing works comprises: a first notching metallic mold group; a first drawing mold group; a second notching metallic mold group; a forming mold; a bending mold group; a second drawing mold group; a main piercing mold; and a cam forming mold. |
