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Volume 47 Issue 1
Jan.  2021
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Journal of Beijing University of Aeronautics and Astronautics  > 2021  >  47(1): 132-139.
ZHANG Pu, HUANG Chuanzhen, ZHU Hongtao, et al. Experimental investigation on micro milling holes of high-strength elastic alloy[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(1): 132-139. doi: 10.13700/j.bh.1001-5965.2019.0650(in Chinese)
Citation: ZHANG Pu, HUANG Chuanzhen, ZHU Hongtao, et al. Experimental investigation on micro milling holes of high-strength elastic alloy[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(1): 132-139. doi: 10.13700/j.bh.1001-5965.2019.0650(in Chinese)
shu

Experimental investigation on micro milling holes of high-strength elastic alloy

doi: 10.13700/j.bh.1001-5965.2019.0650
  • 1.

    Center for Advanced Jet Engineering Technologies(CaJET), School of Mechanical Engineering, Shandong University, Jinan 250061, China

  • 2.

    Key Laboratory of High efficiency and Clean Mechanical Manufacture, Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China

  • 3.

    National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China

  • 4.

    School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney NSW 2052, Australia

Funds:

National Natural Science Foundation of China 51375276

National Natural Science Foundation of China 51675312

  • Received Date: 29 Dec 2019
  • Accepted Date: 13 Mar 2020
  • Publish Date: 20 Jan 2021
    Abstract

  • In this study, several sets of experiments were carried out to evaluate the characteristics of micro milling holes in high-strength elastic alloy 3J33B material using an ultra-precision machine tool. The milling forces were measured using a Kistler 9119AA2 dynamometer, and the sizes and surface burrs on the machined holes were measured using a Keyence 3D laser scanning microscope. Furthermore, tool wear was examined using a Scanning Electron Microscope (SEM) and an Energy Dispersive Spectrometer (EDS). Experimental results indicate that the force in Y direction is always greater than the force in X direction regardless of the cutting speed variation. High cutting speeds or high spindle speeds may affect the machining dimensional accuracy during micro milling holes. The most serious region of tool wear is the tool tip of cutting edge in micro milling holes, and the wear is mainly concentrated on the whole cutting edge roundness and the flank which is near the cutting edge roundness. Abrasive wear is the main form of tool wear at a low cutting speed, and the effect of oxidation wear on tool wear increases with the increase in the cutting speeds. The elastic recovery of the machined surface aggravates the wear of the flank wear and affects the cutting stability.

     

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