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The shearing butt welding device welds the heads and tails of two strip steel coils after accurate shear, to make strip steel be fed into the accumulator continuously. After adjustment by centering device, a 3° angle of inclination is accurately sheared on the head and tail of strip steel. Then, the shearing butt welder moves to shear position and finishes the welding process. Double welding guns are used here for welding to reduce butt joint time.