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Ultra-High-Speed Magnetic Abrasive Surface Micro-Machining of AISI 304 Cylindrical Bar

1
Division of Mechanical Design Engineering, Chonbuk National University, 664-14, Duckjin-gu, Jeonju 761-756, Korea
2
Division of Mechanical Design Manufacturing and Automation, Shijiazhuang Rail University, Shijiazhuang 050043, China
*
Author to whom correspondence should be addressed.
Metals 2019, 9(5), 489; https://doi.org/10.3390/met9050489
Received: 4 February 2019 / Revised: 23 April 2019 / Accepted: 24 April 2019 / Published: 27 April 2019
(This article belongs to the Special Issue Advanced Surface Enhancement)
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Abstract

The ultra-high-speed magnetic abrasive machining (UHSMAM) process is a surface improvement technique, which has been widely used to minimize the surface accuracy and change the precision morphology of difficult-to-machine materials. Surface integrity plays an important role in the machining process, because it is used to evaluate the high stress and the loaded components on the machined surface. It is important to evaluate the plastically deformed layers in ultra-precision machining surface of material. However, the usual plastic strains in the ultra-precision machining surface are significantly difficult to consider. In this paper, an ultra-high-speed magnetic abrasive machining technique is used to improve the surface accuracy and dimensional accuracy of an AISI 304 bars. Additionally, the subsequent recrystallizations technique is used for measuring the plastic strain on machined surface of AISI 304 bars. The purpose of this paper is to evaluate the effects of an UHSMAM process on the plastic strains and the strain energy of the machined surface, and to evaluate the residual strain in the plastic deformation of AISI 304 bars materials by analyzing a plastically deformed layer. The results showed that the plastic strain of the material did not change after machined by an UHSMAM process. Based on the results, an UHSMAM process could significantly improve the surface roughness, micro-diameter, and removal weight of AISI 304 bars effectively. The surface roughness Ra of AISI 304 bars was improved from 0.32 µm to 0.03 µm for 40 s of machining time at 80,000 rpm of workpiece revolution speed. View Full-Text
Keywords: ultra-high-speed magnetic abrasive machining; surface accuracy; dimensional accuracy; recrystallization technique; surface integrity; plastic strain ultra-high-speed magnetic abrasive machining; surface accuracy; dimensional accuracy; recrystallization technique; surface integrity; plastic strain
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Yin, C.; Wang, R.; Kim, J.S.; Lee, S.W.; Mun, S.D. Ultra-High-Speed Magnetic Abrasive Surface Micro-Machining of AISI 304 Cylindrical Bar. Metals 2019, 9, 489.

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