METHOD FOR PREVENTING CRACKING AT WELD ZONE OF SHEET FOR PRESSING AND ELECTRIC HEATING/ANNEALING DEVICE OF WELD PART

摘要

PURPOSE: To prevent the cracking of the weld zone by electrically heating and annealing the welded part in a long-sized coil or a traverse coiling product by welding the sheet for pressing. ;CONSTITUTION: The sheet 5 for pressing is fixed by applying the pressure, and a joined part is annealed by the Joule heating of the inner resistance by sending a specified current to the weld zone. The electric heating of the weld zone of the sheet for pressing allows the uniform recrystalized structure, and the material characteristics capable of withstanding the cutting and bending in the pressing process can be obtained.;COPYRIGHT: (C)1994,JPO&Japio