冷镦螺母是一种比较先进的工艺,其材料利用率、螺母的机械强度以及机器的生产率都比较高。但冷镦方法多因螺母材料和螺母形状(单面倒角或双面倒角、普通螺母或异形螺母)而异。这里选出几种国内、外较先进的冷镦方法分别介绍如下: 一、多工位冷镦工艺一般分为四工位和三工位两种(都不包括切断工位)。前者是苏修A412型螺母多工位自动冷镦机所采用的工艺(见图1)。后者是我国 Cold forging nut is a more advanced technology, its material utilization, the mechanical strength of the nut and the productivity of the machine is relatively high. However, the cold heading method is mostly due to the nut material and the shape of the nut (one-side chamfering or double chamfering, normal nut or alien nut). Here are selected several domestic and foreign more advanced cold heading methods are described below: First, the multi-station cold heading process is generally divided into four and three three-bit station (do not include the cutting station). The former is the Soviet Union repair A412 nut multi-station automatic cold heading machine used in the process (see Figure 1). The latter is my country