Multi Objectives Performance Optimisation Of Ultrasonic Assisted Drilling Parameter For Gorilla Glass: Parameters Investigation

Heng, Wei Zuan (2019) Multi Objectives Performance Optimisation Of Ultrasonic Assisted Drilling Parameter For Gorilla Glass: Parameters Investigation. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays, chemically strengthened glasses are highly demanded in various industries due to their superior properties. The demands for micromachining of glass are growing for the manufacture of micro devices. Nevertheless, micromachining of glass is a big challenge due to the properties of high hardness and brittleness of the glass. These properties lead to some problems during machining such as generate large amount of burr, reduce tool life, surface roughness and accuracy of machining. To tackle this challenge, a new drilling technique ultrasonic assisted vibration combine with rotary drilling tool was introduced aim to increase the drilling performance. This technique uses intermittent motion mechanism for removing material which produces a smooth cutting process and improves the chip evacuation process. The main objective of this research is to investigate the optimal input parameters for drilling of chemically strengthened glass. In order to optimize the drilling process, the correlation between the combined parameters namely the frequency, amplitude, cutting speed and feed rate on drilling performances were investigated in this research. The main process responses that have be taken into account are cutting force, delamination area at entry and exit. The expected results of this study is to produce small delamination area at entry and exit, low value of cutting force and also a good surface finish without formation of burr surround the machined hole by using ultrasonic assisted drilling.

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