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TC4钛合金锥形环辗轧坯料仿真优化设计

ISSN号：1007-2012
期刊名称：塑性工程学报
时间：2014
页码：25-31
分类：TG33[金属学及工艺—金属压力加工]
作者机构：[1]西北工业大学凝固技术国家重点实验室,西安710072
相关基金：国家自然科学基金资助项目（51175427，51135007）；国家自然科学优秀青年科学基金资助项目（51222509）；金属挤压与锻造装备技术国家重点实验室（中国重型机械研究院有限公司）基金资助项目（2011MEFETKF＿03）；国家科技重大专项“高档数控机床与基础制造装备”课题资助项目（2010ZX04004-131-07）。
相关项目：塑性加工工艺、模具与设备

关键词： TC4钛合金, 锥形环, 环件轧制, 坯料优化设计, 有限元建模仿真, TC4 titanium alloy, conical ring parts, ring rolling, optimal design of blank, FE simulation

中文摘要：

T C4钛合金锥形环辗轧坯料对成形环件的几何（圆度、壁厚均匀性）、温度与应变分布等具有重要影响。该文针对T C4钛合金锥形环件热辗轧过程设计了“芯辊基准型”和“驱动辊基准型”两种不等壁厚锥形环坯，对传统“等壁厚型”锥形环坯进行优化；采用基于ABAQUS软件平台的建模仿真方法，模拟并揭示了辗轧过程中轧制力、成形环件圆度、壁厚均匀性及温度与应变场对3种不同环坯的响应规律。结果表明，“芯辊基准型”和“驱动辊基准型”两种锥形环坯下，辗轧过程中的轧制力较“等壁厚型”锥形环坯下的轧制力小；“芯辊基准型”、“驱动辊基准型”和“等壁厚型”锥形环坯下，成形环件表面质量、圆度、壁厚均匀性及温度分布均匀性依次变差，但应变分布均匀性依次变好。综合考虑，“芯辊基准型”锥形环坯更适合于该文T C4钛合金锥形环辗轧过程。

英文摘要：

The ring blank plays an important role in the geometric accuracy , temperature and strain fields during the conical ring rolling process for TC4 titanium alloy . In this paper , we have first designed two kinds of ring blanks with unequal thickness to optimize the traditional blank with equal thickness .One is based on the mandrel geometry and the other is based on the main roll geometry . And then the response rules and mechanism of the roundness , thickness uniformity and temperature and stain fields of the rolled ring for the three kinds of blanks have been revealed through numerical simulation based on ABAQUS . The results show that , under the above three types of blanks , namely blanks based on mandrel geometry , based on the main roll geometry and with equal thickness , the rolling force orderly tends to be bigger ;the roundness and thickness uniformity of the rolled ring orderly tend to be worse ;the temperature distribution of the rolled ring orderly becomes more inhomogeneous ;and the equivalent plastic strain distribution orderly becomes more homogeneous . So the blank contacting with the mandrel is the best selection a-mong the above three types of blanks for the conical ring rolling process of TC 4 titanium alloy billets .

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