METHOD FOR CONTROLLING UP-SET PRESSURE OF FLASH BUTT WELDER ACCORDING TO STRIP THICKNESS AND STEEL TYPE

摘要

PURPOSE: A control method is provided which is capable of improving welding quality and productivity by automatically calculating proper up-set pressure value according to type of steel and thickness of strip to be welded, thereby controlling the calculated up-set pressure value so as to perform welding. CONSTITUTION: The method for controlling up-set pressure of flash butt welder according to strip thickness and steel type comprises the steps of setting a data table according to steel type by receiving data on strip thickness and steel type to compute an up-set pressure required during welding between strips by flash butt welder; calculating thickness of the front head of representative strip; calculating the proper up-set pressure by regression analyzing a proper up-set pressure for steel type and strip thickness on the calculated thickness of the front head of representative strip; controlling pressure in valve stand, potentiometer and amplifier based on the calculated up-set pressure value; and displaying the proper pressure value controlled through a pressure control part into a digital value.