Title: Experimental investigation on the efficiency of the wrap around nozzle as coolant delivering system for ultra high speed grinding

Authors: Naoufel Ben Moussa; Farhat Ghanem; Nizar Ben Salah; Nabil Ben Fredj

Addresses: Laboratoire de Mécanique, Matériaux et Procédés LR99ES05, Ecole Nationale Supérieure d'Ingénieurs de Tunis, 5 Avenue Taha Hussein, Montfleury, 1008, Tunis, Université de Tunis, Tunisia ' Laboratoire de Mécanique, Matériaux et Procédés LR99ES05, Ecole Nationale Supérieure d'Ingénieurs de Tunis, 5 Avenue Taha Hussein, Montfleury, 1008, Tunis, Université de Tunis, Tunisia ' Laboratoire de Mécanique, Matériaux et Procédés LR99ES05, Ecole Nationale Supérieure d'Ingénieurs de Tunis, 5 Avenue Taha Hussein, Montfleury, 1008, Tunis, Université de Tunis, Tunisia ' Laboratoire de Mécanique, Matériaux et Procédés LR99ES05, Ecole Nationale Supérieure d'Ingénieurs de Tunis, 5 Avenue Taha Hussein, Montfleury, 1008, Tunis, Université de Tunis, Tunisia

Abstract: In recent years, attention has been given to develop efficient and optimised cooling systems for grinding to reduce the process cost and to limit the health hazards of operators. In ultra-high speed grinding this issue is particularly complex because the thick air barrier rotating with the grinding wheel prevents the fluid from reaching the grinding zone. In this paper, results of experiments conducted to characterise the application of the wrap around nozzle (WRN) to the ultra high speed plunge surface grinding are presented. Experiments were conducted in a peripheral wheel speed ranging from 50 to 380 m/s and the effects of the nozzle position. This efficiency was compared to a cooling system composed of double air scrapper and a conventional jet type system. Experiments showed that the WRN has higher and much stable cooling efficiency in the ultra-high-speed range of the grinding wheel.

Keywords: ultra high speed grinding; wrap around nozzle; air scraping; useful flow rate; cooling efficiency.

DOI: 10.1504/IJSURFSE.2020.105883

International Journal of Surface Science and Engineering, 2020 Vol.14 No.1, pp.34 - 47

Received: 15 Apr 2019
Accepted: 18 Aug 2019

Published online: 10 Mar 2020 *

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