... controlled with PLC.get CE certificate H-beam Automatic Assembly Machine,H-beam production line,welding machineProcess including clamping and ... flange, automatic tack-welding is controlled with PLC. Main machine is driven by A.C.inverter, stable and reliable. ... beam production line, h-beam straiqtening machine, h-beam fabrication line, spot welding maachine for h-beam, streel structure equipment, ...