Investigation on Cutting Performance of Micro-Textured Cutting Tools.

Qinghua Li,Kaixing Hu,Chen Pan,Yuxin Jiao

doi:10.3390/mi10060352

Qinghua Li, Kaixing Hu + Show 2 more

Open Access

https://doi.org/10.3390/mi10060352

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Journal: Micromachines	Publication Date: May 28, 2019
Citations: 21	License type: CC BY 4.0

Affiliation: Changchun University

Abstract

This paper explores the influence of micro textures on cutting performance of polycrystalline cubic boron nitride (PCBN) tools from two aspects, that is, tool wear and machined surface roughness. By designing micro-hole textures with different forms and scales on the rake face of tools when PCBN tools turn hardened steel GCr15, and combining finite element analysis (FEA) technology and cutting experiments, the cutting performance of micro-textured tools is simulated and analyzed. This paper analyses the influence of micro textures on tool wear and machined surface roughness by analyzing cutting force, Mises stress and maximum shear stress of tool surface. Results of finite element analysis (FEA) and cutting experiments show that the reasonable micro-hole textures can significantly alleviate tool wear and improve machined surface quality when compared with the non-textured tools. Besides, the size of micro-hole textures on the rake face play an important role in reducing the cutting force and tool wear. This is mainly because micro-hole textures can reduce cutting force and improve tool surface stress. Finally, by designing reasonable micro-hole textures on the rake face, the problems of bad roughness of machined workpiece and severe tool wear of PCBN tools in cutting GCr15 material are solved. Consequently, the paper shows that micro-hole textures have a positive effect on improving the cutting performance of tool.

Highlights

As for studying surface micro textures, many scholars [1,2,3,4] first applied micro textures to the motion pairs which contacted each other and produced friction relative motion, and studied the effect of micro textures on friction performance
The results showed that micro textures could reduce friction between moving components, and reduce friction coefficient, and improve wear resistance of components
Yin et al [5,6] used fluid dynamics (CFD) technology and found that the bearing capacity of sliding bearings was related to the distribution of micro textures in the bearing position, and reasonable micro textures design could effectively improve the performance of sliding bearings

Summary

Introduction

As for studying surface micro textures, many scholars [1,2,3,4] first applied micro textures to the motion pairs which contacted each other and produced friction relative motion, and studied the effect of micro textures on friction performance. Micro textures provides a new method to study the cutting force and tool wear produced in the cutting process. Yang et al [15] found that reasonable micro textures of tool surface could effectively reduce friction coefficient, reduce cutting force and improve the surface quality of the workpiece. Qi et al [17] had proven that micro grooves could improve the friction between the rake face and chips of cemented carbide tools, and reduce the cutting temperature and the cutting force, on this account, micro grooves effectively improved the bonding phenomenon of titanium alloys and the heat transfer ability of tools, and improved the wear resistance of tools. By means of finite element analysis (FEA) and cutting experiments, the influence of micro textures on tool wear of PCBN tools and machined surface roughness of workpiece in cutting GCr15 were studied and investigated

Design Experiments

Analysis of Experiment Results

Analyzing the Effect of Micro-hole Textures on Tool Wear

Analyzing Tool Wear of Cutting Experiments

Analyzing Machined Surface Roughness of Workpiece

Conclusions