Title: Experimental investigation on drilling of borosilicate glass using micro-USM with and without tool rotation: a comparative study
Authors: Sandeep Kumar; Akshay Dvivedi
Addresses: Mechanical and Industrial Engineering Department, Indian Institute of Technology Roorkee, Uttarakhand, 247667, India ' Mechanical and Industrial Engineering Department, Indian Institute of Technology Roorkee, Uttarakhand, 247667, India
Abstract: The application of microproducts is increasing rapidly in various fields such as automobiles, electronics, microfluidics, bio-MEMS, etc. These microproducts are generally made of hard and brittle materials, e.g., glass, quartz, ceramics and silicon, etc. The machining of these materials in micro-domain is a difficult task. Micro-ultrasonic machining (micro-USM) is a preferred process for machining of hard and brittle materials. But high tool wear and low aspect ratios limits its industrial use. This investigation compares the effect of tool rotation on material removal rate and hole overcut. Additionally, aspect ratio was measured. The variable process parameters for the investigation were power rating, static load, slurry concentration and abrasive size. Imaging was used for qualitative analysis of tool wear. The experimental results reveal that micro-USM with tool rotation resulted in higher material removal rate, lesser hole overcut, high aspect ratios and lesser tool wear in compared with micro-USM without tool rotation.
Keywords: micro-ultrasonic machining; micro-USM; microfluidics; hole overcut; HOC; tool rotation; microholes; glass.
International Journal of Additive and Subtractive Materials Manufacturing, 2017 Vol.1 No.3/4, pp.213 - 222
Received: 10 Apr 2017
Accepted: 29 Sep 2017
Published online: 25 Feb 2018 *