非对称件的拉延——介绍上海-50型拖拉机仪表罩壳的拉延

• 作 者: 钟云芳
• 机 构: 上海拖拉机厂,
• 出 处: 模具技术
• 发表日期: 1984年05期
• 关键词: 拖拉机仪表 罩壳 非对称 胀形 压料力 失败原因分析 拉延力 圆角半径 产时 盒形件

一、问题的提出非对称零件的拉延,若不准确地选择拉延的方向,在很多场合下是不能成功的。例如我厂生产的上海-50型拖拉机的仪表罩壳(图1),1971年试产时,曾因考虑不周,采用V形单只拉延(图2),尽管同志们日夜苦战,试压了近百次,浪费模具十余副,最后还是以失败告终。V形单只拉延模失败原因分析如下:拉延时,开始接触是R30的尖角,且胀形的程度很大,四

First, the question put forward Asymmetrical parts of the drawing, if not accurately select the direction of drawing, in many cases can not be successful. For example, I plant the Shanghai -50 tractor instrument shell (Figure 1), pilot production in 1971, had due to ill-considered, using only V-shaped drawing (Figure 2), although the comrades day and night bitter battle, try Press nearly a hundred times, wasting more than 10 molds, and finally ended in failure. V-shaped pull model failure analysis of the reasons are as follows: Drawing, the beginning of the contact is R30 sharp corners, and bulging a large extent, four