NEW BASIC OIL FOR THE LUBRICATION INDUSTRY.

摘要

THIS INVENTION REFERS TO A METHOD FOR AUTOMATICALLY CONTROLLING THE CURRENT AND TENSION OF ARC WELDING TO PERFORM A PROPER ARC WELDING. A PROCESSOR CALCULATES (106, 112) THE ERRORS (EPSILONI, EPSILONV) BETWEEN THE VALUES (I, V) OF THE CURRENT AND THE PERIODICALLY MEASURED REAL WELDING VOLTAGE AND ITS BLANK VALUES (IO, VO). WHEN THE ERROR OF THE WELDING CURRENT IS OUTSIDE THE PERMITTED VALUE, IT CALCULATES (109) A CORRECTION AMOUNT OF THE WIRE FEED SPEED (DELTAFW) BASED ON SUBSTITUTING THE MAIN VALUE (I) OF THE WELDING CURRENT CORRECTION VALUE OF THE WELDING CURRENT (DELTAI) EQUAL TO THE PRODUCT OF THE WELDING CURRENT ERROR CALCULATED BY THE CURRENT GAIN IN A FORMULA INCLUDING A LINEAR POLYNOMIUM (G '' (I)) OF THE WELDING CURRENT AND THE AMOUNT OF CHANGE OF WELDING CURRENT (DELTAI) AS VARIABLES AND SEND THE AMOUNT (DELTAFW) TO A WELDING MACHINE. WHEN THE WELDING VOLTAGE ERROR IS OUTSIDE THE PERMITTED VALUE, THE PROCESSOR CALCULATES (115) A POWER SUPPLY CORRECTION AMOUNT (DELTAV) BASED ON SUBSTITUTING A WELDING POWER CORRECTION AMOUNT ( ) AND AN AMOUNT OF WELDING VOLTAGE CORRECTION (DELTA V) EQUAL TO THE PRODUCT OF THE WELDING VOLTAGE ERROR CALCULATED BY THE VOLTAGE GAIN IN A FORMULA CONTAINING THE CORRECTION VALUES OF THE WELDING CURRENT AND THE WELDING (DELTAI, DELTAV) AS VARIABLES AND SENDS THE CORRECTION AMOUNT (DELTA U) TO THE WELDING MACHINE. THE WELDING MACHINE OPTIMIZES THE WELDING CURRENT AND VOLTAGE BY REGULATING THE FEED SPEED OF THE WIRE AND THE OUTPUT OF THE POWER SUPPLY.