... is controlled with PLC.get CE certificate H-beam Automatic Assembly Machine,H-beam production line,welding machineProcess including clamping and alignment ... and flange, automatic tack-welding is controlled with PLC. Main machine is driven by A.C.inverter, stable and reliable. Upper ... rails, ensuring steady clamping of long time use. h-beam machine, h-beam steel, h-beam welding line, h-shape steel ...