锻压技术

坯料形状对多排链轮半精锻成形过程影响的数值模拟

英文标题：Numerical simulation of influence of billet shape on the forming of

作者：程旺军池成忠王永祯林鹏赵日红梁伟

单位：太原理工大学

分类号：

出版年,卷(期):页码：2015,40(1):130-136

摘要：

提出了多排链轮半精锻成形的新工艺，设计了实心和空心坯料半精锻成形模具，运用三维有限元模拟技术，对多排链轮半精锻成形过程进行数值模拟，分别得到了空心和实心两种坯料填充凹模型腔的损坏程度场和等效应力场，并分析了两种坯料成形过程的基本特点。结果表明：相同模拟条件下，空心坯料齿顶处的损坏程度最大，实心坯料芯轴孔处损坏程度最大，最大损坏因子分别为 1.52 和 0.98；空心坯料齿顶处的应力集中最大，实心坯料芯轴孔和齿顶处的应力集中最大，最大等效应力值分别为 167和 110 MPa，因此采用实心坯料成形多排链轮优于空心坯料。

A new deformation process of semi-precision forging for multi-row sprocket was put forward and the die structures for the solid and the hollow billets of semi-precision forging were designed accordingly. The semi-precision forging process was simulated by three-dimensional finite element technology. The damage fields and the equivalent stress fields of die cavity filled with the solid and the hollow billets were obtained respectively and finally the basic characteristics of deformation processes for two billets were analyzed. The results show that under the same simulative conditions, the maximum damage extent is on the teeth top of the hollow billets and the mandrel hole of the solid billet, their maximum damage factors are 1.52 and 0.98 respectively. The maximum stress concentration is on the teeth top of the hollow billets, and the mandrel hole and the teeth top of the solid billet, their maximum equivalent stresses are 167 and 110 MPa respectively. Therefore, forming multi-row sprocket with solid billet has more advantages than that of the hollow billet.

基金项目：

国家自然科学基金资助项目 (51175363; 51274149)

程旺军 (1987-), 男，硕士研究生

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