Experimental and Finite Element Study of Steady State Micro-cutting Characteristics of Aluminum Alloy (2A12)  

作　　者：陈光 任成祖 靳新民 郭韬 

机构地区：[1]Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education,Tianjin University

出　　处：《Transactions of Tianjin University》2011年第5期344-350,共7页天津大学学报（英文版）

基　　金：Supported by the National High Technology Research and Development Program of China ("863" Program, No.2008AA042509)

摘　　要：This paper studies the micro-cutting characteristics of aluminum alloy (2A12) based on a series of orthogonal experiments and finite element method (FEM) simulations. An energy-based ductile failure law was proposed in the FEM simulation. The simulated cutting forces and chip morphology were compared with experimental results. The simulation result indicates that there is a close relationship between the cutting force and cutting heat. The micro-cutting force decreases as the heat flux vector increases. Both the cutting heat and the micro-cutting force need a finite time to achieve a steady state. It is observed that with the cutting speed of 169.95 m/min and uncut chip thickness of 6 μm, the heat flux vector in the workpiece increases to a stable value after 0.06 ms; meanwhile, the principal cutting force decreases to a steady state correspondingly, i.e., the micro-cutting process achieves the steady state. It is concluded that the steady state micro-cutting simulation can reflect the cutting process accurately.This paper studies the micro-cutting characteristics of aluminum alloy （2A12） based on a series of orthogonal experiments and finite element method （FEM） simulations. An energy-based ductile failure law was proposed in the FEM simulation. The simulated cutting forces and chip morphology were compared with experimental results. The simulation result indicates that there is a close relationship between the cutting force and cutting heat. The micro-cutting force decreases as the heat flux vector increases. Both the cutting heat and the micro-cutting force need a finite time to achieve a steady state. It is observed that with the cutting speed of 169.95 m/min and uncut chip thickness of 6 μm, the heat flux vector in the workpiece increases to a stable value after 0.06 ms; meanwhile, the principal cutting force decreases to a steady state correspondingly, i.e., the micro-cutting process achieves the steady state. It is concluded that the steady state micro-cutting simulation can reflect the cutting process accurately.

关 键 词：MICRO-CUTTING aluminum alloy steady state finite element method 

分 类 号：TG146.21[一般工业技术—材料科学与工程] O241.82[金属学及工艺—金属材料]