Patent ID: 9289812
Filing Date: 2016-03-22
CPC Classification: B21D

Claim Text:
1. An apparatus for forming a sheet metal blank into a pot including a bottom, a wall and a drawn edge, said apparatus comprising: a punch with a bottom forming area forming the bottom and a wall forming area forming the wall; an annular blank holder surrounding said punch and having a supporting surface for placing the drawn edge; an inner die with a bottom forming area; an outer die with a wall forming area and a clamping area for gripping the drawn edge and for pressing the drawn edge against the supporting surface of said annular blank holder; and a drive respectively associated with at least two parts including the punch, the annular blank holder, the inner die and the outer die, all of which are involved in a drawing process, wherein said drive moves said at least two parts simultaneously with different respective speeds in the drawing direction during a specific phase of the forming.