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Hemming machine and method

  • US 5,150,508 A
  • Filed: 06/28/1991
  • Issued: 09/29/1992
  • Est. Priority Date: 06/28/1991
  • Status: Expired due to Term
First Claim
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1. A machine for forming a unitary structure from a first steel panel having an upturned flange and a second steel panel having a flat edge portion, comprising:

  • (a) a support surface unit including a support surface for receiving said first panel and said second panel in a superimposed relation with said edge portion of said second panel proximate to said flange of said first panel;

    (b) a plurality of first flange engaging members having bevelled engaging surfaces, said first flange engaging members being located at a pre-hem position;

    (c) a plurality of second flange engaging members having substantially right-angled engaging surfaces, said second flange engaging members being located at a final-hem position;

    (d) means for moving said support surface unit to said pre-hem position such that said flange of said first panel is pressed against said bevelled engaging surfaces of said first flange engaging members, wherein said flange of said first panel is bent by approximately 45°

    with respect to the plane of said first panel to form a pre-hemmed flange;

    (e) means for moving said support surface to said final hem position such that said pre-hemmed flange is pressed against said substantially right-angled engaging surfaces of said second flange engaging members, wherein said pre-hemmed flange of said first panel is bent to fully clinch said edge portion of said second panel to form said unitary structure.

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