The seam (roll) welding special machine is the evolution of spot welder. It uses the roller electrode to replace the cylindrical electrode of spot welding and as the welding work piece moves between the rolling plates, the seal welding will generate weld nuggets which will overlap with each other so as to achieve welding effect.
The weld seam of roll welding is composed of welding spots. According to different overlap of the melting cores, it could be divided into roll spot welding and air-tight seam welding. There exist three stages in the forming process of welding spots: pressurization, heating fusing and cooling crystallization like spot welding.
Adopt intelligent microcomputer single piece controller which achieve pure digital setting. Online computer programming, LED digital display, stable performance, convenient modification of the program online.
Adopt intelligent microcomputer control welding system. When the voltage fluctuates, it will compensate the welding current automatically to ensure the stability of welding.
Adopt digital circuit control; select the components from famous factories in the world to ensure the equipment could operate steadily in the long run.
Adopt SEMIKRON from West Germany, IXYS and IR silicon controlled from United States. High precision, long operating life, achieve high stability control of the magnitude of current.
The transmission tile axis adopts the latest mercury conductive technology from abroad. State-of –the-art technology with good performance in transmission and conductivity.
Welding roll wheel adopts the alloy copper material from Japan. High rigidity, good conductivity.

Specification

Item Model	Maximum Short Current KA	Rated Duty Cycle %	Secondary Voilage V	Rated Power KVA	Electrode Pressure N	Electrode Stroke mm	Cooling Water Lmim
FM-20	20	50	≈9.8	≤50	4700	80	24
FM-25	25	50	≈9.8	≤70	4700	80	24
FM-40	40	50	≈11.6	≤120	7300	80	30
FM-60	60	50	≈11.6	≤160	12000/18000	100	50
FM-80	80	50	≈11.6	≤240	12000/18000	100	50
FM-120	120	50	≈11.6	≤300	18000	100	60