resistance butt Welder refers to the resistance welding method opposite-place the end surface of weldments and heat with the resistance heat from welding current through weldment for pressurized welding.Double discharge resistance buttwelder aims at welding of meldium-carbon steel,is of function like preheating,trimming and flashback,and applies not only to butt joint of compact wire rod,but also to butt joint of expanding sheet material(soft steel,medium-carbon steel and stainless steel,etc). It is specially equipped with level straight sliding track for time and accurate upset force forwarding during welding and further level,smooth and firm butt weld joint whitout embrttlement.