矩形管冷拔工艺的改进

Improvement of Rectangular Tube Cold-drawing Process

针对某厂矩形管生产中存在成材率低和模具使用寿命短的问题,从理论上分析了废管产生的原因,并对原生产工艺进行了改进,将初始冷拔工序改为辊轧工序后,避免了矩形管长边抖纹缺陷的产生;同时还修改了模具形状,由此提高了模具使用寿命。

Addressing the problems relating to low yield and short die service life encountered by a certain rectangular steel tube maker, relevant elements responsible for the high rejection rate are theoretically analyzed, and the existing manufacturing process is modified, involving such actions as changing the initial cold-drawing step into a rolling one to prevent development of trembling defective marks on the long side surface of the tube, and modifying the mandrel shape to enhance its service life.