锻压技术

钛合金L型材电辅助热绕弯工艺仿真

英文标题：Simulation on electric assisted hot draw-bending process for titanium alloy L profile

作者：王杨杨李小强郭贵强金朝海李东升

单位：北京航空航天大学

关键词：钛合金 L型材电辅助热绕弯成形回弹

分类号：TG306

出版年,卷(期):页码：2021,46(4):136-142

摘要：

针对小截面大包角钛合金型材零件的弯曲成形，提出了一种新型热绕弯成形工艺。为了研究该工艺的成形特点，基于ABAQUS软件建立了钛合金L型材电辅助热绕弯成形的有限元模型，并对TC2钛合金弯曲构件在700 ℃条件下的热绕弯过程进行了数值模拟，分析了侧压力、摩擦系数、成形角速度及应力松弛时间等工艺参数对成形回弹的影响规律。结果表明：在采用新型热绕弯成形工艺成形小截面大包角型材零件的过程中，当侧压力和摩擦系数增大时，型材回弹量显著减小；当成形角速度增大时，型材回弹量随之增大；当应力松弛时间增加时，应力松弛后的型材回弹量呈现先显著减小、后趋于稳定的变化规律。

For the bending of titanium alloy profile part with small section and large wrap angle, a new hot draw-bending process was proposed. In order to explore the forming characteristics of the process, the finite element model of electric assisted hot draw-bending for titanium alloy L profile was established based on software ABAQUS, and the hot draw-bending process of TC2 titanium alloy curved component at 700 ℃ was simulated numerically. Then, the influence laws of process parameters such as side pressure, friction coefficient, forming angular velocity and stress relaxation time etc. on the forming springback were analyzed. The results show that in the process of forming profile parts with small section and large wrap angle, using the new hot draw-bending process, the springback of profile decreases significantly with the increasing of side pressure and friction coefficient, the springback of profile increases when the forming angular velocity increases, and when the stress relaxation time increases, the springback of profile after stress relaxation shows a significant decrease first and then tends to be stable.

基金项目：

国家重点研发计划资助项目(2017YFB0306200）；国家自然科学基金资助项目(51775023)；航空科学基金资助项目(2016ZE51040)

王杨杨（1995-），男，硕士研究生 E-mail：1747668646@qq.com 通讯作者：李小强（1979-），男，博士，副教授 E-mail：littlestrongcn@163.com

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