砂带恒压磨削的有限元热学模型及实验验证  

Finite Element Thermal Model and Experimental Verification for Constant Pressure Belt Grinding Process

作　　者：张毅[1,2] 张伟文[2] 郭钢[2] 

机构地区：[1]重庆大学软件学院,重庆400044 [2]重庆大学机械工程学院,重庆400044

出　　处：《四川大学学报（工程科学版）》2011年第6期238-242,247,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：重庆市科技攻关计划资助项目(2008AB3014)

摘　　要：为了研究恒压砂带磨削的磨削温度与磨削参数之间的关系,改善磨削加工工艺,提高磨削质量,从磨削接触区域的弹性接触分析入手,研究了恒压砂带磨削区域上热源分布规律,建立了恒压砂带磨削的有限元热学模型,分析了磨削过程中的热现象,并进行了磨削温度的实验验证。结果表明,磨削热大部分集中于中间较宽的接触区域,单点磨削温度前期升温速度较快,而后期阶段降温速度则较为缓慢,磨削区面积较大时,磨削热分布较为平均。恒压砂带磨削实验采用热电偶露头埋设和浅埋设2种测温方式,分别测量了磨削区表面磨削温度和表层磨削温度,实验结果和模拟结果基本吻合,因此,所建立的恒压砂带磨削的有限元热学模型是有效的。In order to study the relationships between the grinding temperature and grinding parameters for constant pressure grinding process,a finite element thermal model was derived and expressed.So the grinding process and quality was improved.Based on the elastic contact analysis in the grinding contact area,the heat distribution of the grinding contact area was studied for the constant pressure belt grinding process.A finite element thermal model was implemented.Thermal phenomena were analyzed in the constant pressure belt grinding process.The experiments of grinding temperature were completed.The results showed that most of grinding heat concentrates in the middle of a wide contact area.Grinding temperature rises faster in the heating stage,and drops slow in the cooling stage.When the grinding area is large,the grinding heat distribution is more average.Experiments of the constant pressure grinding process used two temperature measurement methods of buried outcrop and shallow buried.The grinding temperature was measured on the surface and under the surface in grinding area.Experiment results and simulation results were probably consistent.

关 键 词：砂带磨削 恒压磨削 有限元分析 热学模型 温度场 

分 类 号：TG580.1[金属学及工艺—金属切削加工及机床]