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METHOD OF AND APPARATUS FOR MAKING PIPE FROM A TUBULAR WORKPIECE

  • US 20100199740A1
  • Filed: 02/01/2010
  • Published: 08/12/2010
  • Est. Priority Date: 02/11/2009
  • Status: Active Grant
First Claim
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1. A method of making pipe from a tubular workpiece having a throughgoing bore, the method comprising the steps of:

  • holding the tubular workpiece in a handler having a passage alignable with the bore and of a predetermined inside passage diameter;

    providing a rod carrying a mandrel and of an outside rod diameter with a guide having an outside guide diameter slightly smaller than the inside passage diameter but greater than the outside rod diameter;

    aligning the passage by means of the handler with the workpiece bore and inserting the mandrel through the handler passage into the workpiece bore while sliding the guide along the passage and centering the rod in the passage by means of the guide out of contact with an inner surface of the passage; and

    externally engaging the workpiece around the mandrel with forging tools and thereby forging the workpiece around the mandrel.

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