CONTROL OF DISTORTION DUE TO WELDING AND THE ADDITIONAL COST INVOLVED

The Author details various aspects of distortion, how such faults occur, how they may be avoided, and how most easily alleviated when they do occur. The cost of alleviating or avoiding distortion is difficult to assess because it is not listed separately in many manufacturing shop records. The amount of distortion that occurs is considerably reduced by the use of automatic welding. Furthermore, the flange plate can be pre-set in a press so that after welding it finishes up level. If distortion persists, the final resort must be to post-heating correction procedures and, in some cases, actual use of force to endeavour to bring weldments back to line. It is emphasised that post-heating can be extremely costly and, unless applied with care, can be very dangerous, leaving heavy local stresses which can give rise to serious consequences. There is a good case to be made for avoiding distortion by thickening-up on material section. The tendency for many years has been to reduce the thickness of material and to rely on the fabricator's expertise to cope with the resultant problems.

  • Corporate Authors:

    Institution of Mechanical Engineers

    1 Birdcage Walk
    London SW1H 9JJ,   England 
  • Authors:
    • Thompson, J D
  • Publication Date: 1977-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00177390
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Jul 19 1978 12:00AM