缓磨时工件表层温度分布的计算机仿真研究  

A STUDY ON TEMPERATURE DISTRIBUTION IN WORKPIECE SURFACE LAYER DURING CREEP FEED GRINDING BY COMPUTER SIMULATION TECHNIQUE

作　　者：徐鸿钧[1] 徐西鹏[1] 许洪昌[1] 张幼桢 

机构地区：[1]南京航空航天大学,南京航空航天大学机电工程学院

出　　处：《应用科学学报》1996年第2期199-207,共9页Journal of Applied Sciences

基　　金：国家自然科学基金

摘　　要：该文在关于缓磨时的磨削热、接触弧区换热过程以及工作表层非稳态温度场的深入研究的基础上，构造了一可用于计算烧伤前后工件表层温度场畸变历程的数学模型，并据此完成了关于缓磨烧伤的数字仿真研究．仿真结果与缓磨实际烧伤过程吻合良好．文中率先阐明了缓磨烧伤的热机理，它不仅确证了缓磨烧伤是一具有明显前兆特征的典型渐变过程，同时也为今后进一步开发缓磨工艺潜力指明了方向．Creep feedgrinding has a vast reservoir of potentialities itself.However since mechanism researches fall behind the production application, its potentialities have not been fully developed. For instance in the grinding circle at home and abroad, the creep feed grinding burn restricting both machining quality and efficiency has been universally considered as one of the most elusive and troublesome problems up to now. In this paper, on the basis of deepgoing researches on grinding heat, the heat transfer process of the contact zone and the unstablestate temperature field in the workpiece surface layer during creep feed grinding,a simulation mathematicsl model which can be used to calculate the time-course of temperature field distortion in the workpiece surface layer has been structured,and on these grounds, the computer aimulation studies of the workpiece burn process during creep feed grinding have been completed. The simulation results accord well with the practice of the burn process during creep feed grinding. The results in this paper take the lead in explaining the heat mechanism of burn course during creep feed grinding, showing that the creep feed grinding burn is a typical slow changing course and has obvious premonition characteristics. Therefore it can be predicted and monitored. This creative work can be regarded as an imper-tant contribution to the basic theory of grinding.

关 键 词：缓进给磨削 磨削温度 传热 烧伤过程 计算机仿真 

分 类 号：TG580.14[金属学及工艺—金属切削加工及机床]