摘要
热量分配比例是锯切加工中的一个重要参量，其值的大小直接影响到传入单颗磨粒的热流强度，进而影响到磨粒的失效形式。以锯切加工为对象，通过花岗石锯切实验，利用热电偶和功率计分别测量温度和功率信号。采用ANSYS有限元软件，分别将基于抛物线热源分布和三角形分布的计算温度与实验测量温度进行拟合，获得弧区内热量分配比例。研究结果表明：锯切弧区的热源更接近抛物线分布，热源按抛物线分布计算的热量分配比例约为6．08％～12．21％，比热源按三角形分布的结果约小1．61％～4．07％。
The energy partition is an important parameter in sawing, whose value directly affects the heat flux of single grain, therefore contributing largely to the failure of diamond. The temperature of the sawing contact is studied in sawing granite. The temperature and power signals are obtained by ammeter and foil thermocouples. A temperature model is established based on a parabolic heat flux distribution and a triangular heat flux distribution. Though matching the calculated temperature carves by the finite element software ANSYS with the measured temperature carves, the energy partition to the work piece are calculated. It is found that the heat flux in sawing contact zone is much nearer a parabolic distribution; and the energy partition to the work piece is about 6. 08% - 12.21% for parabolic distribution, about 1.61%-4.07% small than that of triangular distribution.
出处
《金刚石与磨料磨具工程》
CAS
2014年第2期11-15,共5页
Diamond & Abrasives Engineering
基金
华侨大学科研基金资助项目(10BS211)
国家自然科学基金(青年)资助项目(51105148)
长江学者和创新团队发展计划(IRT1063)
关键词
热源分布
热量分配比例
有限元仿真
锯切
花岗石
heat distribution
energy partition
finite element simulation
sawing
granite
