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Apparatus for manufacturing a metal pipe

  • US 4,491,004 A
  • Filed: 04/16/1982
  • Issued: 01/01/1985
  • Est. Priority Date: 08/18/1980
  • Status: Expired due to Term
First Claim
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1. An apparatus for fabricating a tubular article from a metal sheet, comprising a base, a top support mounted for movement with respect to said base, a support tool mounted on the base and comprising at least two spaced parallel rotatable support rolls, bending tool means mounted on said top support and comprising at least one bending roll disposed parallel to said support rolls, drive means for moving a metal sheet between said bending roll and said support rolls in a direction transverse to the longitudinal dimension of said rolls wherein said metal sheet is bent into tubular shape by applying a bending force through said bending roll along a longitudinal line located between said support rolls, first spring roller means supporting said bending roll from said top support, second spring roller means for mounting each of said support rolls with respect to said base, said first and second spring roller means permitting rotation of said rolls and corresponding transverse movement of said sheet, means for applying a force to said bending roll sufficient magnitude to overcome the force of said first and second spring means and provide a rigid mounting for both said support rolls and said bending roll during the bending operation to bend said sheet to form said tubular article, and actuator means for moving said bending roll into contact with the outer surface of said tubular article whereby the article is supported for rotation for subsequent processing by said support rolls and said bending roll.

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