Effect of Machining Parameters on BK7 Optical Glass Using Conventional and Rotary Ultrasonic Machines

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  • HAMZAH Esah
    Department of Materials Engineering
  • SUDIN Izman
    Department of Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia
  • KHOO Chun-Yong
    Department of Materials Engineering
  • ZAINAL ABIDIN Nor Najwa
    Department of Materials Engineering
  • TAN Ming-Jiun
    Department of Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia

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Abstract

This paper studies the machinability of BK7 optical glass by using conventional ultrasonic machining (USM) and rotary ultrasonic machining (RUM). For USM, the finer grit size gives low MRR, good surface finish, small chipping size and low opaqueness. In RUM, higher spindle speed gives good MRR, excellent surface finish, high opaqueness and small chipping size. Whilst higher feedrate gives high MRR, low surface finish, low opaqueness and small chipping size. The edge chipping size could be decreased with backing material.

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