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Technical Brief

Numerical investigation of micro-texture cutting tool on hydrodynamic lubrication

[+] Author and Article Information
Zhengyang Kang

School of Mechanical Engineering, Jiangsu University, Jiangsu 212013, China
kzy_blue@yeah.net

Yonghong Fu

School of Mechanical Engineering, Jiangsu University, Jiangsu 212013, China
fyh@ujs.edu.cn

Jinghu Ji

School of Mechanical Engineering, Jiangsu University, Jiangsu 212013, China
andyjee@163.com

Liang Tian

Chendu Tool Research Institute Co., Ltd Sichuan 212013, China
tl825@163.com

1Corresponding author.

ASME doi:10.1115/1.4035506 History: Received July 05, 2016; Revised December 13, 2016

Abstract

The aim of this technical brief is to provide a numerical approach to investigate the lubricity enhancement effect of micro grooves texture on tools rake face. The key parameters related to cutting condition and grooves morphology were considered in the analytical model of tool-chip friction pair. The fully textured surfaces with the periodic micro-grooves were systematically studied by solving the non-dimensional Reynolds equation with the multi-grid method. The results indicated that the micro-grooves texture generates extra carrying capacity comparing to the flat tool; the optimum grooves direction is vertical to the chip sliding; also, higher area density and optimum grooves width can promote hydrodynamic lubrication. By modifying the tool rake face geometry to restrict the tool-chip slope angle, efficient region of surface texture could be greatly extended. In addition, the film's average pressure was nearly proportional to the chip velocity. Hence, the textured tool is more effective in high-speed cutting.

Copyright (c) 2016 by ASME
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