APPARATUS FOR CONTROLLING MOTION OF WELDING ELECTRODE Russian patent published in 2003 - IPC

FIELD: apparatuses for angular welding of dressed and angular seams by gas shield welding and under flux. SUBSTANCE: inlet of voltage pickup is connected with power source of electric arc and outlet of pickup is connected with inlet of Schmitt flip-flop whose outlet through inverter is connected with first inlet of three-inlet AND- gate. Second inlet of AND-gate is connected with clock pulse generator and third inlet of AND-gate is connected with outlet of second pickup of scanning phase. Second outlet is connected with inlet of counter. Reset inlet of counter through single shot multivibrator is connected with outlet of first pickup of scanning phase, its outlet is connected with inlet of digital-analog converter whose outlet is connected with inlet of smoothing filter. Outlet of said filter is connected with first inlet of comparator whose outlet through third inverter is connected with inlet of amplifier of drive unit for correcting oscillations of electrode. Inlet of pickup measuring amplitude of electrode oscillation is connected with outlet of correction drive unit whose outlet through second inverter is connected with inlet of amplifier with variable gain and with inlet of adder. Second inlet of adder is connected with setter of welding speed; outlet of setter is connected with inlet of amplifier of drive unit for moving head across butt. Outlet of said amplifier is connected with inlet of drive unit for moving head across butt. Outlet of adder through amplifier of lengthwise motion of head is connected with drive unit for lengthwise motion of head. EFFECT: improved design allowing to enhance quality of welded joint due to higher accuracy of tracking butt. 2 dwg