Entity

Time filter

Source Type


Duchosal A.,National School of Engineering, Saint-Etienne | Serra R.,INSA Val de Loire | Leroy R.,Center Detude Et Of Recherche Sur Les Outils Coupants Ceroc | Hamdi H.,National School of Engineering, Saint-Etienne
Journal of Cleaner Production | Year: 2015

This paper focuses on a numerical optimization of the minimum quantity lubrication (MQL) design parameters outside a rotating tool with the Taguchi method under finishing conditions in order to get enough oil on the cutting edge before removing materials. This environmental-friendly technique is suitable for cleaner manufacturing for a wide context of production. Parameters as particle sizes for different oil mist input device parameters (inlet pressures) as function of different canalization geometries have been determined on a previous experimental part. The evaluated parameters are: different inlet pressures, inner oriented canalizations, cutting speeds and feed rates. The simulations highlighted the impingement of the different oil particle sizes on the tool carbide inserts as function as these different parameters. The main goal of the MQL process is to spray the cutting edge to ensure a good lubrication on the tool-chip contact area depending on the feed rate and the cutting depth. Thus, criteria such as volume per unit area (oil amount) and an average distance of the oil scatter from droplet impingements (oil impingement to the cutting edge) relative to a global virtual area from tool/chip interface are considered. The Taguchi method for the "design of experiments" (DOE) is applied in order to optimize numerical design parameters in finishing conditions as function of those criteria. The analysis shows that doe approach is suitable to solve this numerical problem. The results show that the optimal combination for a high lubrication performance at high cutting speed is based on small feed rate, with high canalization orientations and inlet pressure. © 2015 Elsevier Ltd. Source


Duchosal A.,National School of Engineering, Saint-Etienne | Serra R.,INSA Val de Loire | Leroy R.,Center Detude Et Of Recherche Sur Les Outils Coupants Ceroc | Hamdi H.,National School of Engineering, Saint-Etienne
Journal of Cleaner Production | Year: 2015

This paper focuses on a numerical optimization of the minimum quantity lubrication (MQL) design parameters outside a rotating tool with the Taguchi method under finishing conditions in order to get enough oil on the cutting edge before removing materials. This environmental-friendly technique is suitable for cleaner manufacturing for a wide context of production. Parameters as particle sizes for different oil mist input device parameters (inlet pressures) as function of different canalization geometries have been determined on a previous experimental part. The evaluated parameters are: different inlet pressures, inner oriented canalizations, cutting speeds and feed rates. The simulations highlighted the impingement of the different oil particle sizes on the tool carbide inserts as function as these different parameters. The main goal of the MQL process is to spray the cutting edge to ensure a good lubrication on the tool-chip contact area depending on the feed rate and the cutting depth. Thus, criteria such as volume per unit area (oil amount) and an average distance of the oil scatter from droplet impingements (oil impingement to the cutting edge) relative to a global virtual area from tool/chip interface are considered. The Taguchi method for the "design of experiments" (DOE) is applied in order to optimize numerical design parameters in finishing conditions as function of those criteria. The analysis shows that doe approach is suitable to solve this numerical problem. The results show that the optimal combination for a high lubrication performance at high cutting speed is based on small feed rate, with high canalization orientations and inlet pressure. © 2015 Elsevier Ltd. Source


Duchosal A.,National School of Engineering, Saint-Etienne | Werda S.,Center Detude Et Of Recherche Sur Les Outils Coupants Ceroc | Serra R.,INSA Val de Loire | Leroy R.,Center Detude Et Of Recherche Sur Les Outils Coupants Ceroc | Hamdi H.,National School of Engineering, Saint-Etienne
International Journal of Machine Tools and Manufacture | Year: 2015

This paper compares experimental and numerical simulations of liquid film formation for different rotating velocities of a milling tool. The numerical model used was based on an unsteady Reynolds-Average Navier-Stokes (RANS) formulation and multiphase Lagrangian model for liquid film formation by the droplet impingement model on a solid surface. The details of spray-wall interaction are presented and the model was used to simulate the liquid film formation in the Micro-Quantity Lubrication (MQL) coolant process for different milling tool velocities. The shape and the size of the liquid film obtained by the calculation and the experiments were compared to improve understanding of the MQL cooling process. Overall, good agreement was observed between the numerical and the experimental measurements of liquid film size from an estimated numerical film thickness border. This study provided greater understanding of oil mist behavior. The impingement analyses predicted better lubrication when highly oriented channels and high inlet pressure were used, especially in High Speed Machining. © 2015 Elsevier Ltd. Source

Discover hidden collaborations