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Patent Searching and Data


Title:
パイプおよび管状材料を矯正する装置
Document Type and Number:
Japanese Patent JP2007537874
Kind Code:
A
Abstract:
Apparatus for reducing the diameter, rounding or straightening of pipe or tubing by rolling comprising a plurality of cylindrical rollers arranged in a parallel-cylindrical array through which the pipe or tubing is passed, the rollers being skewed to displace their central contact zones radially inwards bringing them into forceful contact with the external surface of the pipe or tubing, and being rotated to cause the central contact zones to describe helical paths along the external surface of the pipe or tubing. Thereby to progressively apply locally to the whole of the external surface of the pipe or tubing a compressive force in excess of the yield strength of its material, causing the pipe or tubing to adopt a set at a smaller diameter.

Inventors:
Castropill Anthony
Application Number:
JP2006515533A
Publication Date:
December 27, 2007
Filing Date:
June 01, 2004
Export Citation:
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Assignee:
Polaskey, Anthony, David
International Classes:
B21C3/08; B21C3/12; B21C37/30; B21D3/04; B21D3/14; B21B19/10
Domestic Patent References:
JPS52111740U1977-08-25
JPS6376315U1988-05-20
JPS502389B11975-01-25
JPH07246403A1995-09-26
Attorney, Agent or Firm:
Shinki Global IP Patent Corporation