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Method and apparatus for sheet forming a blank using a variable bead

  • US 5,901,599 A
  • Filed: 07/17/1996
  • Issued: 05/11/1999
  • Est. Priority Date: 07/18/1995
  • Status: Expired due to Fees
First Claim
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1. A method for sheet forming a blank using at least one variable point bead comprising the following steps of:

  • holding said blank between a blank holder and an opposing die so that wrinkling is essentially prevented in said blank;

    forming said blank to an objective shape with a punch; and

    selectively imposing separate individual point-like bead forces on said blank at selected positions through one or more variable point beads and only during a partial time period of said forming step,wherein said variable point beads are not line beads.

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