METHOD FOR MONITORING MOVING STATE OF STEEL SHEET LAP PART FOR NARROW LAP SEAM WELDING

摘要

PURPOSE: To quantitatively monitor a moving state in the running direction of steel sheet lap parts when steel sheets of a steel process manufacturing line are subjected to narrow lap seam welding. ;CONSTITUTION: When a steel sheet 1 of the steel process manufacturing line is subjected to narrow lap seam welding, a rear end part 1a of the preceding steel sheet 1 is superposed on the tip part 2a of a succeeding steel sheet 2 and while those lap parts P are welded in the cross direction in a stationary state, the movement in the traveling direction of the specified surfaces of the respective steel sheets 1a and 2a close to the lap parts P is detected by laser beam feed monitoring sensor heads 3a, 3b, 3c and 3d of a laser beam detector 3 as the quantity of movement. The signal is inputted to a controller 4 where the quantity of movement in each traveling direction is calculated and further, the relative quantity of movement in the traveling direction is calculated and a relative moving state in the traveling direction of the lap parts P is monitored thereby.;COPYRIGHT: (C)1993,JPO&Japio