Mirror surface finishing of hemispherical inside surface by newly developed ELID grinding system

Masayoshi Mizutani, Hiroshi Kotani, Tetsuya Naruse, Jun Komotori, Kazutoshi Katahira, Hitoshi Ohmori, Kenji Sumiya, Motoki Wasa, Masahiro Fujita, Tadashi Hasegawa

Research output: Contribution to journalArticle

Abstract

In this study, in order to apply electrolytic in-process dressing (ELID) grinding for surface finishing process of the sliding parts of metal on metal (MOM) artificial hip joints, a new grinding system to grind the inside surface of a hemispherical cup was developed. In this system, the workpiece was pressurized against the centre of the ball shaped grinding wheel with an oscillating pressure pin during the processing. The shape and the radius of the ball shaped grinding wheel were adjusted by using different size abrasive grains. Hemispherical cup-shaped samples of Cobalt-Chromium (Co-Cr) alloy were ground by this grinding system and their surface smoothness was improved. In addition, the roundness of the specimens was the same as or superior to that of the commercially available sliding parts. This result suggests that this grinding system is applicable as a surface finishing process of the sliding parts of MOM artificial hip joints.

Original languageEnglish
Pages (from-to)576-580
Number of pages5
JournalSeimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering
Volume77
Issue number6
DOIs
Publication statusPublished - 2011 Jun
Externally publishedYes

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Keywords

  • Artificial hip joint
  • Biomaterial
  • Co-Cr alloy
  • ELID grinding
  • Metal on metal (MOM)

ASJC Scopus subject areas

  • Mechanical Engineering

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