标题：Investigation of size effect on micro hardness of machined surface in micro cutting
作者：Zhang, Tao ;Shi, Zhen Yu ;Yan, Bing ;Qi, Hou Jun
作者机构：[Zhang, Tao ;Yan, Bing ;Qi, Hou Jun ] Tianjin Key Laboratory of High Speed Cutting and Precision Machining, Tianjin University of Technology and Educa 更多
会议名称：2nd International Conference on Precision Mechanical Instruments and Measurement Technology, ICPMIMT 2014
会议日期：30 May 2014 through 31 May 2014
来源：Applied Mechanics and Materials
关键词：Machined surface; Micro cutting; Micro hardness; Size effect
摘要：Micro cutting is a promising way for manufacturing micro parts, especially micro three dimension parts. Micro hardness is an important character to evaluate surface integrity of machined surface. Micro cutting is different from macro cutting due to size effect of specific cutting energy because of the influence of the ratio of uncut chip thickness to cutting edge radius. A group of micro cutting experiments were conducted to investigate the cutting parameters on the micro hardness of machined surface. The micro hardness of machines surface decreases with the ratio of uncut chip thickness to cutting edge radius first, and then increase when the uncut chip thickness is smaller than the cutting edge radius. The micro hardness shows size effect due to the machined surface compressed twice with the round cutting edge. The micro hardness decreases with the distance increasing far away from the machined surface. © (2014) Trans Tech Publications, Switzerland.