... hydraulic hole punching, reinforcing bid pressing---material feeding--- roll forming--- straightening--- hydraulic cutting off---- material unloading, ... Inner diameter φ450-530mm, out diameter φ1200mm.4) Racka. One piece construction, the roll forming device, straightening device, ... line equipped with 15T hydraulic punching machine.7) Roll Forming MachineRoll Forming rollers: material GCr15, hardness ...