Title: Experimental evaluation on tribological properties of nano-particle jet MQL grinding

Authors: Changhe Li; Dongkun Zhang; Dongzhou Jia; Sheng Wang; Yali Hou

Addresses: School of Mechanical Engineering, Qingdao Technological University, 266033 Qingdao, China ' School of Mechanical Engineering, Qingdao Technological University, 266033 Qingdao, China ' School of Mechanical Engineering, Qingdao Technological University, 266033 Qingdao, China ' School of Mechanical Engineering, Qingdao Technological University, 266033 Qingdao, China ' School of Mechanical Engineering, Qingdao Technological University, 266033 Qingdao, China

Abstract: Tribological properties of nano-particle jet minimum quantity lubrication (MQL) grinding were mainly evaluated in K-P36 NC surface grinder. Under dry grinding, flood grinding, MQL grinding and nano-particle jet MQL grinding working conditions, the tribological properties were evaluated from the perspectives of grinding force, frictional coefficient, G-ratio, grinding temperature and surface roughness. The results showed that nano-particle jet MQL grinding improved the heat exchange capability; the temperature reduced by nearly 150°C compared with that in dry grinding. Compared with dry grinding, frictional coefficient in MQL grinding, nano-particle jet MQL grinding and flood grinding was decreased successively and respectively by 11.22%, 29.21% and 32.18%. The surface roughness Ra of workpiece prepared by dry grinding was 1.2 µm, and the Ra value of nano-particle jet MQL grinding was 0.58 µm. The G ratio of nano-particle jet MQL grinding was 33, the highest of all four conditions. The G-ratio of dry grinding was only 12, which was about twice the value in other conditions.

Keywords: dry grinding; nanoparticles; nanoparticle jet MQL grinding; flood grinding; minimum quantity lubrication; G-ratio; grinding force; frictional coefficient; grinding temperature; tribological properties; surface roughness; surface quality; tribology; NC grinding.

DOI: 10.1504/IJSURFSE.2015.068243

International Journal of Surface Science and Engineering, 2015 Vol.9 No.2/3, pp.159 - 175

Received: 28 Dec 2013
Accepted: 20 Oct 2014
Published online: 26 Mar 2015 *

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