摘要
基于三维热力耦合的有限元模拟和高速切削试验研究了亚微米陶瓷刀具和普通陶瓷刀具切削H13淬硬钢的过程,建立了高速切削的三维有限元模型、磨损模型及求解条件,进行了高速切削试验并对刀尖的磨损形貌进行分析,分析了亚微米陶瓷刀具和普通陶瓷切削过程中的切削力、切削温度和刀具磨损的演化规律。研究表明:经亚微米陶瓷刀具切削上的最高温度随着切削速度的增加而增加,但是当切削到达稳态时温度不再升高;切削力随切削速度的增大而增大;亚微米陶瓷刀具的磨损形态主要是月牙形;工件在切削后的最高温度远小于熔点温度,因此可保证H13钢表面的光洁度;普通陶瓷刀具和亚微米陶瓷刀具相比磨损形态包括后刀面月牙形洼型磨损和前刀面磨损,并易造成崩刃。
3D thermo-mechanical coupled finite element numerical computational models with wear model and solution conditions for turning process of alloy steel H13 by submicron A1203 and common ceramic tool were studied. Three-dimensional finite element models, high speed cutting wear model and solution conditions were established, high speed cutting test and morphology observations were carried. The cutting force, cutting temperature and tool wear behavior for submicron ceramic cutting tools and common ceramic tools were examined. The results of numerical simulation indicate that the maximum temperature of tool increases with the cutting speed rising during cutting by the submicron ceramic tool to a steady value during the steady cutting. Cutting force increases with cutting speed. The highest temperature of the workpiece is far less than the melting temperature, so the metal surface finish could be guaranteed. Wear modes and cutting forces for submicron A12O3 and common ceramic tool in the process of cutting are compared, submicron ceramic cutting tool can improve the surface quality of workpiece signific＇antly and decrease the tool wear.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第11期195-200,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(50975302)
重庆市自然科学基金计划重点项目(CSTC
2008BA4037)
关键词
亚微米陶瓷刀具
三维有限元模型
高速切削
磨损
Submicron ceramic tool
3D computational modeling
high speed turning
wear
