... , all the process finished automatically.2) Construction:The whole line is composed by decoiler, hydraulic punch press, feeding device, ... 5) Feeding device: synchronism adjusting rollers.6) Punching MachineThis line equipped with 15T hydraulic punching machine.7) Roll Forming MachineRoll ... , the passive rollers are driven by gears, with center distance a=75, reduction ratio i=30 worm gear case, ...