Eventos Anais de eventos
COBEF 2023
12th Brazilian Congress on Manufacturing Engineering
Machining of quartz single crystal using micro grinding tool.
Submission Author:
Luis Antonio Oliveira Araujo , SP
Co-Authors:
Luis Antonio Oliveira Araujo, Carlos Eiji Hirata Ventura
Presenter: Luis Antonio Oliveira Araujo
doi://10.26678/ABCM.COBEF2023.COF23-0410
Abstract
The single crystals are attractive materials due mechanical characteristics. Comparing to steels, it has a regular atomic arrangement, dimensional stability at high temperatures and low weight. The challenges related to this material are the machinning process. It is a anisotropic material, with high surface hardness and brittleness, demanding specific cutting conditions and parameters. Piezoelectric single crystals are mainly represented by Quartz (SiO2), which currently has two major applications: resonators for electronics and sensors (load and inertial sensors). The Quartz single crystal is traditionally machined by abrasive (blade or belt/wire) and ultrasonic machining. This study aims to investigate the surface finish of Quartz single crystal plane X, using a micro grinding tool (a micro milling tip). It is not a common application for machining the Quartz, but it has advantages when applied in the construction of micro prototype piezo sensors or actuators, mostly due to the cost, because it is not necessary to invest in a ultrasonic process. In addition, the grinding tip enables the fabrication of more complex geometries when compared to other abrasive processes. The methodology to evaluate surface finish in this study starts on three process parameters: tool rotation speed, tool feed rate over the workpiece and depth of cut. The grinding tool will generate channels on the Quartz and the surface average roughness and crack dimension will be aim of the analysis. Preliminary results indicates it is not a high productivity technique. Tool cleaning and cutting lubrication play an extremely important role in tool life application for hard materiais.
Keywords
Micro Grinding Tool, Quartz, machining
