Eventos Anais de eventos
COBEF 2023
12th Brazilian Congress on Manufacturing Engineering
Investigation of Vibration in Micromilling with Minimum Quantity Lubrication: Parameter Selection
Submission Author:
Mohammad Ali , Brunei-Muara , Brunei
Co-Authors:
Mohammad Ali, Shaffiq Hussin, Wayne Nguyen Phu Hung, Abdul Mazid
Presenter: Wayne Nguyen Phu Hung
doi://10.26678/ABCM.COBEF2023.COF23-0282
Abstract
Micromilling using minimum quantity lubrication (MQL) is proven to reduce the cutting temperature and improve the cutting tool life. However, vibration remains as one of the critical issues. Thus, the objective of this research is to analyse the vibration produced during the process of micromilling with MQL. A high-precision CNC milling machine DT110 (Mikrotools Inc, Singapore) was used to machine microchannels with end milling tool (500 µm diameter, flat end, two flutes, 5 µm edge radius) on a C1100 copper alloy workpiece. The machining process was lubricated using MQL system (Bluebe FK, Fuji BC, Japan) with biodegradable vegetable-based oil. The parameters were the oil flow rate, nozzle air pressure, nozzle direction, spindle speed and depth of cut. Responses parameters were the spindle speed frequency (SSF) amplitudes and SSF chatter amplitudes. The accelerometer was attached onto the high-speed air bearing spindle (ABS-400, Nakanishi, Japan) installed onto the CNC machine DT110. The measured vibration data was recorded by the DAQ system and analysed using Graphtec GL-7000. This research showed that spindle speed, depth of cut, oil flow rate, nozzle pressure and nozzle direction are found to be influential in generating vibration in micromilling. Whereas, feed rate, tool overhang and nozzle distance are found to be not significant in generation vibration.
Keywords
micromilling, chatter vibration, Minimum Quantity of Lubrication, MQL, Design of Experiment
