Apparatus for straightening a cylindrical member

Details Apparatus for straightening a cylindrical member Apparatus for straightening a cylindrical member

1997-02-26

1998-04-14

Larson, Lowell A.

Metal deforming

With temperature modification of tool or of specified...

Distinct temperature modifications at distinct locations of...

7234294, 72 162, 72 173, 72 3103, 21912137, B21D 3716

Patent

active

057379572

ABSTRACT:
An apparatus for straightening a cylindrical member having an imperfection. An imperfection detector is used to locate the imperfection. A plasma arc torch is used to heat a portion of the cylindrical member in the vicinity of the imperfection. The plasma arc torch has an arc extending between an anode and an electrode. Gas flows past the arc and is heated, thus expanding into a plasma jet. The plasma arc torch directs the plasma jet toward the cylindrical member, thus heating a portion thereof. A quenching device is used to quench the heated portion of the cylindrical member, thus alleviating the imperfection. A control system automates the straightening process by monitoring the detector and controlling the heating and quenching based on information within a database. Peening or burnishing may be employed in lieu of the plasma arc torch.

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"Plasmas for Joining, Cutting and Surfaces," L. O'Brien, WRC Bulletin, 131/Jul. 1968, pp. 1-19.

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