widen and bend the blank until the edge of the platform is aligned with the two ends of the second roll curve, that is, the exposed platform is equivalent to L1, and the edge of the first milling cutter is placed on the platform.

put the wire into the pressure wire, and gradually from one end to prevent the wire from popping out suddenly, first buckle up one end, then place a buckle for a period of time, after the buckle is carried out, gently knock, it is convenient to curl the edge close to the iron wire.

The above-mentioned rolling methods are suitable for various materials, and this is the rolling operation step.