Title: An investigation on effect of characteristics of the peanut oil MQL on tool life in hard turning 9CrSi steel

Authors: Thai-Son Le; Minh-Duc Tran; Dang-Binh Nguyen; Van-Cuong Nguyen

Addresses: Department of Mechanical Engineering, Vinh University of Technology Education, Nguyen Viet Xuan Street, Vinh City, Vietnam ' Thai Nguyen University of Technology, 3-2 Street, Thai Nguyen City, Vietnam ' Viet Bac University, No. 45, Hoang Van Thu Street, Thai Nguyen City, Vietnam ' Department of Mechanical Engineering, Vinh University of Technology Education, Nguyen Viet Xuan Street, Vinh City, Vietnam

Abstract: In this study, the hard turning steel 9CrSi prepared with CBN tool using minimum quantity lubrication (MQL) of peanut oil with a focus on effects of fluid characteristics. The peanut oil MQL fluid was first formed by varying pressure from 4 atm, 5 atm and 6 atm then introduced into working area with a rate of 0.5, 1.0, and 1.5 ml/min. As a result, the peanut oil MQL achieved longer tool life than its dry cutting and emulsion MQL counterparts confirming the cooling and lubrication roles of peanut oil in machining. Additionally, the optimal set of cutting condition for tool life, surface appearance and dimensional accuracy was found at a fluid forming pressure of 5 atm accompanied with a fluid flow speed of 1.0 ml/min. The analysis process of affected mechanisms with the optimal results was also addressed herein.

Keywords: peanut oil MQL; minimum quantity lubrication; tool life; hard turning; peanut oil; steel machining; cooling; coolants; surface appearance; dimensional accuracy; fluid forming pressure; fluid flow speed.

DOI: 10.1504/IJMMM.2013.054275

International Journal of Machining and Machinability of Materials, 2013 Vol.13 No.4, pp.428 - 438

Received: 21 Jan 2012
Accepted: 04 Oct 2012
Published online: 26 Dec 2013 *

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