H-beam Automatic Assembly Machine,H-beam production line,welding machine Process including clamping and alignment of web and flange, automatic tack-welding is controlled with PLC. Main machine is driven by A.C.inverter, stable and reliable. Upper press-beam is guided thru left and right four rails, ensuring steady clamping of long time use. h-beam machine, h-beam steel, h-beam welding line, h-shape steel, h-beam production machine, h-beam production line, h-beam straiqtening machine, h-beam fabrication line, spot welding maachine for h-beam, streel structure equipment, steel welding line, weiding line, weiding production line, steel welding productin line, steel production line, I-beam production line.