High frequency welding of flange and web material - by forming flange into circle, hot pressing, and hf welding flange and web

摘要

High frequency welding comprises bending flange element in a circle, heating and pressing the element, and making high frequency welding of flange material and web material in a manner to change heating degree of both elements by inducing current to the flange element and at the same time inducing properties dielectric to the web element. Deformation energy requirement for bending flange material is minimal.