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Method and apparatus for controlling forging force during flash butt welding of railway rails

  • US 6,163,003 A
  • Filed: 06/12/1998
  • Issued: 12/19/2000
  • Est. Priority Date: 06/12/1998
  • Status: Expired due to Term
First Claim
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1. A method of weld joining adjacent rail ends comprising the steps of:

  • applying electrical power to the adjacent rail ends while simultaneously effecting relative closing movement between the rail ends through actuating means so as to bring the rail ends into position to effect current flow between the rail ends;

    determining a force necessary to move the adjacent rail ends into a welding position as the adjacent rail ends close and during flashing of the adjacent rail ends due to the current flow;

    selecting an upset force per unit area, and establishing a predetermined upset force by multiplying the upset force per unit area by a cross-sectional area of the adjacent rail ends;

    adding the determined force to said predetermined upset force to determine a total forging force; and

    forging the adjacent rail ends into a weld joint using the total forging force.

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