Method of reducing distortion by transient thermal tensioning

摘要

A method to minimize the distortion, such as buckling, caused in the welding of thin plate by utilizing transient thermal tensioning to induce areas of residual tensile stress. Distortion of such welded plates after stiffeners are welded to the plates is due to large areas of unsupported residual compressive stress following the tensile stress that is induced along the weld lines by the welding of the stiffeners. Application of transient thermal tensioning by moving heat sources at the time of welding of the stiffeners induces areas of residual tensile stress that minimize the tendency of the plates to buckle. Multiple heat sources of variable intensity may be utilized, and multiple stiffeners may be welded to a single panel by the method. Minimization of distortion improves the function and appearance of the finished plates and minimizes post-welding repairs.