Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Evaluating the grinding of AISI 4340 interrupted workpieces under abundant cooling method, using a CBN grinding wheel
Submission Author:
Eduardo Carlos Bianchi , SP
Co-Authors:
Luis Otávio Barreto de Sampaio Alves, Gilson Eduardo Torrento, José Claudio Lopes, Roberta Silveira Volpato, Hamilton José de Mello, Paulo Aguiar, Rafael Lemes Rodriguez, Lucas de Martini Fernandes, Bruno Sato, Eduardo Carlos Bianchi
Presenter: José Claudio Lopes
doi://10.26678/ABCM.COBEM2017.COB17-1683
Abstract
The grinding is a machining process designated to obtain extremely precision dimension, usually in a micrometric scale. Following this approach, it has been done a study to verify the effects of the grinding process in interrupted workpieces. It was used three feed-rate (0.25, 0.50 and 0.75 mm/min), and four workpiece geometries, considering pieces with continuous geometry and with two, six and twelve grooves. A CBN wheel was applied on the tests. Roundness, Roughness, Acoustic Emission, Scanning Optical Microscopy and Grinding Wheel Wear were the Output parameters of evaluation. It was observed that increasing the feed-rate, the roughness increased too. An increasing trend of a worst roundness was obtained as a function of the feed-rate increasing. The feed-rate increasing also led to a higher level of grinding wheel wear considering all workpiece geometry, beyond provoking an elevation in the acoustic emission levels. Workpieces with interrupted geometry had a decreasing trend in the variations previously mentioned, as the number of grooves is increased, as function of more non-contact instants of interaction between the workpiece and the grinding wheel due to the interrupted geometry.
Keywords
interrupted cutting, CBN grinding wheel, Grinding
