Int. J. of Nanomanufacturing   »   2013 Vol.9, No.1

 

 

Title: Development of a new grinding system for finishing of hemispherical inside surface

 

Authors: H. Kotani; J. Komotori; T. Naruse; M. Mizutani; K. Katahira; H. Ohmori; M. Wasa; K. Sumiya

 

Addresses:
Department of Mechanical Engineering, KEIO University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama-shi, Kanagawa 223-8522, Japan
Department of Mechanical Engineering, KEIO University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama-shi, Kanagawa 223-8522, Japan
Koriyama Technical Academy, 5, Uenoyama, Koriyama-shi, Fukushima 963-8816, Japan
Materials Fabrication Laboratory, RIKEN Advanced Science Institute, 2-1, Hirosawa, Wakou-shi, Saitama 351-0198, Japan
Materials Fabrication Laboratory, RIKEN Advanced Science Institute, 2-1, Hirosawa, Wakou-shi, Saitama 351-0198, Japan
Materials Fabrication Laboratory, RIKEN Advanced Science Institute, 2-1, Hirosawa, Wakou-shi, Saitama 351-0198, Japan
Mizuho Ikakogyo Co., Ktk., 30-13, Hongo 3-chome, Bunkyo-ku, Tokyo 113-0033, Japan
Mizuho Ikakogyo Co., Ktk., 30-13, Hongo 3-chome, Bunkyo-ku, Tokyo 113-0033, Japan

 

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 work piece was pressurised against the centre of the ball shaped grinder with an oscillating pressure pin during the processing. The shape and the radius of the ball shaped grinder were adjusted by using different size abrasive grains. Hemispherical cup-shaped test pieces of 20Cr-2Ni-20Co stainless steel were ground by this grinding system and their surface smoothness was improved. This result suggests that this grinding system is applicable as a surface finishing process of the sliding parts of MOM artificial hip joints.

 

Keywords: new grinding system; ELID grinding; bioimplants; surface finishing; electrolytic in-process dressing; artificial hip joints; inside surfaces; hemispherical cups; medical implants; stainless steel; surface roughness; surface quality; biomedical engineering; bioengineering.

 

DOI: 10.1504/IJNM.2013.052883

 

Int. J. of Nanomanufacturing, 2013 Vol.9, No.1, pp.77 - 86

 

Submission date: 02 Apr 2012
Date of acceptance: 03 Oct 2012
Available online: 26 Mar 2013

 

 

Editors Full text accessAccess for SubscribersPurchase this articleComment on this article