The invention does not need molds, can realize the purpose of twisting and processing rod pieces of different lengths at any angle, and has the advantage of quick and convenient processing.
优点是不需要模具，可实现任意角度、不同长度杆件的扭转加工，且加工快捷方便。
2
The significance of the hexagonal pass diagonal disign in (he twisting rolling, selection of the diagonal angle are introduced. The allocation of the pass and the disign example are introduced too.