锻压技术

基于正交试验的热冲压冷却过程数值模拟分析

英文标题：Numerical simulation of hot stamping cooling process based on orthogonal experiment

作者：张渝丁波马军伟

单位：重庆交通大学

分类号：TG386

出版年,卷(期):页码：2015,40(3):105-109

摘要：

以热冲压模具为研究对象，针对超高强度钢板热冲压成形中的冷却过程，建立热成形模具冷却系统的有限元模型，对热冲压模具的热应力与热变形大小和分布进行研究。采用ABAQUS软件对其保压淬火阶段进行热力耦合模拟仿真，并基于正交试验设计，考查了管道直径、与上型面距离、两管道间距、与侧型面距离四因素对模具热应力与热变形大小及其分布的影响。分析研究了多指标因素不同水平下，影响热冲压模具的热应力与热变形大小及其分布规律，最终确定了最优冷却水管道排布为A3B1C3D2，即管道直径为Ф10 mm，与上型面距离为4 mm，两管道间距为5 mm，与侧型面距离为5 mm。

For the cooling process of ultra-high-strength steel in hot stamping, a finite element model of the cooling system in thermoforming mold was established，the size and distribution of thermal stress and thermal deformation of hot stamping mold were studied. The stage of holding pressure quenching was simulated by ABAQUS with thermal-mechanical coupling. Based on orthogonal design, the influences of the pipe diameter，the distance to the up profile，the distance between two pipes and the distance to side profile on the size and distribution of thermal stress and thermal deformation of hot stamping mold were examined. Furthermore, their impact regulations under different levels of the multi-index factors were analyzed. The optimum cooling water piping arrangement A3B1C3D2 was ultimately determined，namely, the pipeline diameter is 10 mm，the distance to the up profile is 4 mm，the distance between two pipes is 5 mm，and distance to side profile is 5 mm.

基金项目：

重庆市科委自然科学基金“冷锻模具非线性预应力加载机制及结构优化研究”（CSTC2012jjA70001)

张渝（1975-），男，博士，副教授通讯作者：丁波（1990-），男，硕士研究生

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