摘要
TC4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TC4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TC4钛合金锥形环辗轧过程。
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 .
出处
《塑性工程学报》
CAS
CSCD
北大核心
2014年第2期25-31,共7页
Journal of Plasticity Engineering
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)
