锻压技术

基于CTSH150型接触线拉拔模具结构的研究

英文标题：Research on drawing die structure based on contact wire CTSH150

作者：刘迪张爽宋桂秋

单位：东北大学

分类号：TG355.4

出版年,卷(期):页码：2018,43(3):128-132

摘要：

针对CSTH150型接触线拉拔工艺，以拉拔理论为基础设计了直线形的拉拔模具，并通过取点拟合的方法设计了圆弧形和指数形拉拔模具。在有限元软件平台ANSYS Workbench中，将拉拔模型对称化处理，通过结构非线性方法，分析了拉拔过程中模具和线坯塑性成形内部应力强度、最大剪应力、等效von Mises应力大小及分布。在直径Φ28 mm到直径Φ24.04 mm拉拔道次，恒定速度为8 mm·s-1时，得出直线形结构拉拔模具对线坯内部的各塑性特性应力最小，有助于提高拉拔效率；而圆弧形和指数形结构拉拔模具在拉拔过程中应力分布在模具中上区域，更利于拉拔过程中润滑剂对模具和线坯的润滑。

Aiming at the drawing process of contact wire CSTH150, drawing dies with linear shape was designed based on drawing theory, and drawing dies with circular arc and exponential shape were designed by fitting points. A symmetry treatment was applied to drawing dies in the finite element software platform ANSYS Workbench, and stress intensity, maximum shear stress and the value and distribution of equivalent von Mises stress were analyzed by nonlinear structure in the drawing process of dies and plastic deformation of wire bars. The results show that each plastic characteristic stress inside wire bars is the minimum by drawing die with linear structure under drawing diameter from Φ28 to Φ24.04 mm and constant velocity of 8 mm·s-1, which is helpful to improve drawing efficiency. However, for drawing die with circular arc shape and exponential shape, the stress distributes on upper zone of dies in the drawing process, and it is more beneficial for lubrication of dies and wire bars during drawing.

基金项目：

辽宁省重大装备制造协调创新中心项目

作者简介：刘迪（1987-），男，硕士，工程师 E-mail：liudi0216@163.com 通讯作者：宋桂秋（1960-），男，博士，教授 E-mail：song1892@sina.com

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