METHOD FOR CONTROLLING WORK FUSION QUANTITY OF BUTT WELDING AND BUTT WELDING MACHINE

摘要

PURPOSE:To stabilize the quantity of fusion of works even if work dimensions are changed for ever welding and to improve welding quality by setting welding conditions to maintain the quantity of fusion of the works at a proper value based on a measured values. CONSTITUTION:The works 1 and 2 are first mounted on lower side electrodes 6 and 8. Upper side electrodes 5 and 7 are then pressurized to the lower side electrodes 6 and 8 side by pressurizing force P and the works 1 and 2 are clamped on a fixed electrode 3 and a mobile electrode 4 and in that state, the mobile electrode 4 is energized to the fixed electrode 3 side by energizing force Q and the end faces of both works 1 and 2 are pressurized. A resistance value of the works is then measured by a resistance value measuring means 9 and the measured value is outputted to a welding condition setting means as a signal and the most desirable welding conditions for the measured value are set automatically in order to obtain the proper quantity of fusion. Accordingly, the quantity of fusion is stabilized even if each work has dimensional variance.