Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Evaluation of Plunge Cylindrical Grinding of AISI 4340 steel under the application of the Minimum Quantity Lubrication coolant technique assisted with wheel cleaning system
Submission Author:
Eduardo Carlos Bianchi , SP
Co-Authors:
Rafael Lemes Rodriguez, Rodolfo Hildebrandt, José Claudio Lopes, Hamilton José de Mello, Paulo Aguiar, Eduardo Carlos Bianchi
Presenter: Rafael Lemes Rodriguez
doi://10.26678/ABCM.COBEM2017.COB17-1589
Abstract
The MQL coolant delivery method promotes the substantial reduce of amount of cutting fluid employed in machining tests, mitigating of risks to people´s health. This technique is also related to environmental sustainability and economic benefits. Nevertheless, one of common problems related to the MQL usage is wheel clogging phenomenon. The final quality and finishing is impaired by the accumulation of a lubricant mist on the wheel surface intrinsic to an inefficient chip removal. On this way, this study evaluated the plunge grinding of AISI 4340 steel with aluminium oxide wheel under application of the Minimum Quantity Lubrication coolant technique assisted with wheel cleaning jet with the main purpose of reducing risks to health and environment. This method carried out with the following flow rates: 30, 60 and 120 ml/h. The results recorded were compared with the ones obtained in tests under application of MQL without wheel cleaning and the conventional coolant method; all tests occurred at the same grinding conditions. The output variables analyzed were: roughness, roundness, diametrical wheel wear, acoustic emission and microhardness. The MQL technique assisted with wheel cleaning jet outperformed the MQL technique without cleaning system showed performance similar to the conventional method with flow rates of 60 and 120 ml/h in terms of the results obtained for all output parameters investigated. Through the optical microscopy, it could be attested the non-occurrence of thermal damages and cracks on the machined surface and sub-surfaces after grinding AISI 4340 steel irrespective of the technique.
Keywords
cutting fluid, MQL technique, Flow rate, Cylindrical grinding, Alumina Oxide wheel
