Research on the Micro Pattern forming of Spiral Grooves in a Dynamic Thrust Bearing

Authors: Sol-Kil Oh, Hye-Jin Lee, Jung-Han Song, Kyoung-Tae Kim, Nak-Kyu Lee, Jong-Ho Kim

Abstract:

This paper deals with a novel technique for the fabrication of Spiral grooves in a dynamic thrust bearing. The main scheme proposed in this paper is to fabricate the microgrooves using desktop forming system. This process has advantages compared to the conventional electro-chemical machining in the viewpoint of a higher productivity. For this reason, a new testing apparatus is designed and built for press forming microgrooves on a surface of the thrust bearing. The material used in this study is sintered Cu-Fe alloy. The effects of the forming load on the performance of micro press forming are experimentally investigated. From the experimental results, formed depths are closed to the target ones with increasing the forming load.

Keywords: Desktop forming system, Fluid dynamic bearing, Thrust bearing, Microgroove.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1058267

References:

[1] Hong, J. H., 2004, "Technical Trends of Intelligent Microfactory for Next Generation,"Journal of Research Institute of Industrial Technology, Vol.19, No. 1, pp. 39~51.
[2] Lee, H. J., Lee, N. K. and Choi, S. G., 2007, "Development of Miniaturized Micro Metal Forming Manufacturing System," Materials Science Forum, Vol. 544-545, pp. 223~226.
[3] Lee, H. J., Lee, N. K., Lee, S. M., Lee, G. A. and, Kim, S. S., 2006, "Development of Micro Metal Forming Manufacturing System," Materials Science Forum, Vol. 505-507, pp. 19~24.
[4] Lee, N. K., Choi, T. H., Lee, H. J., Choi, S. G., Park, H. J. and La, W. K., 2005, "Development of Micro Metal Forming Manufacturing System," Proceedings of the KSME Spring Conference, pp. 383~388.
[5] Yoon, J. H., Ahn, B. W. and Park, S. J., 2004, "A Deburring Characteristics of Small Punching Holes using Micro Press," Trans. Of KSMTE, Vol. 13, No.3, pp. 61~67.
[6] Lee, H. J., Lee, N. K., Lee, H. W., 2007, "Development of Micro press for Forming the Micro Thin Foil Valve," Trans. Of KSTME, Vol. 16, No.5, pp. 166~171.