期刊
出版社
ASME
DOI: 10.1115/1.4042307
关键词
cryogenic machining; tool life; computational fluid dynamics (CFD); finite element method (FEM)
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Aerospace Manufacturing Technology Center (AMTC) of the National Research Council of Canada (NRC)
A hybrid modeling approach based on computational fluid dynamics (CED) and finite element method (FEM) is presented to simulate and study cryogenic machining (CM) of Ti-6Al-4V alloy. CFD analysis was carried out to study the characteristics of the fluid flow and heat transfer process of liquid nitrogen (LN2) jet used as a coolant in turning operation. The velocity, turbulence, gas volume fraction, and temperature of the impingement jet were investigated. Based on the analysis results, the coefficient of heat transfer (CHT) between the LN2 and cutting toollinsert was obtained and used in the FEM analysis to model the heat transfer process between the LN2 and the tool/chip/workpiece. A three-dimensional (3D) finite element (FE) model was developed to simulate a real CM operation. CM tests were carried out to validate the 3D FE model by comparing cutting forces and chip temperature. To evaluate LN2 cooling effect on tool temperature and tool wear, a two-dimensional (2D) FE model was developed for steady-state thermal analysis of cryogenic and dry machining. Based on the predicted temperatures, the tool wear was estimated, showing that LN2 cooling can significantly improve tool life.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据