| 摘要 |
PURPOSE:To make a flawless forming article in high efficiency by forming a flange without any friction, by pushing a rotary upper die down by pressing a flash roller to the peripheral wall part of the rotary blank stock that a dropping mandrel is engaged with the lower die fitting a preformed blank stock of the upper part opening. CONSTITUTION:The spring 13 energizing mandrel 10 of the upper die 11 is fitted by its insertion by inputting the preformed blank stock A press-formed from a discoid plate onto the lower die with its opening part upward. A flash roller 12 is fitted to a peripheral wall part B to rotate the upper and lower dies 9, 11 and mandrel 10 at equal speed. A flange part C is in succession formed between the upper die 11 and roller 12 by descending the upper die 11 by pressing it against the spring 13 energizing. The titled forming article is made without flaws in high efficiency with one time of rotary press stage by forming the blank A without giving it a rotary slide friction.
|
