UN Series Pneumatic AC resistance characteristics of resistance butt welding machine is two workpiece face always pressed by resistive heat to the plastic state, and then quickly forging force is applied to the top (with or without top forging force only keep welding pressure) to complete the welding method . ★ welding process is simple, put away the workpiece, foot switch to high welding efficiency. ★ process is simple, a small amount of shortening weldment, small burr, smooth welding joints. ★ welding process is simple, foot switch to high welding efficiency put away the workpiece. ★ has two or three times the discharge pulse welding function, for medium and high carbon steel with a warm-up - Integer - annealing and other functions. ★ compact design, the use of micro-processor control, for welding workpieces of varying thickness can be adjusted to ensure the quality of welding. ★ mainly for small cross section (less than 250 mm2) metal profiles (such as wire, pipes, etc.) butt. ★ can store 15 welding procedures: Different welding specifications can be stored in different welding program, very easy to achieve smooth and accurate welding of different parts. ★ equipment is simple, easy to operate. ★ Widely used in metal wire, pipe and other fields.