Micro Pattern Forming of Spiral Grooves in a Fluid Dynamic Bearing Using Desktop Forming System

Jung Han Song; Jeanho Park; Jong Sup Lee; Seo Gou Choi; Hye Jin Lee; Jeong Ho Hwang

doi:10.4028/www.scientific.net/AMR.538-541.1203

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 538-541Micro Pattern Forming of Spiral Grooves in a Fluid...

Micro Pattern Forming of Spiral Grooves in a Fluid Dynamic Bearing Using Desktop Forming System

Abstract:

This research explores the micro-forming process of spiral groove pattern on Fluid Dynamic Bearing(FDB), which is utilized in precision driving part of the hard disk drive(HDD), using micro desktop forming system. While EDM and ECM process has been widely used to engrave the precision pattern which generates dynamic pressure on FDBs, micro forming process is newly proposed in this study to increase the productivity and to reduce the product costs. At first, desktop forming system is designed for spiral groove pattern forming. FE simulations are followed in order to evaluate the feasibility of micro-forming. The simulation results show that forming loads of 1,500Kgf is required to fabricate micro patterns with the depth of 15 μm. Finally the formability test is carried out with various forming loads. Deformed shapes and forming loads obtained from the test are compared with those from the analysis. The results fully demonstrate that micro pattern forming techniques are available to fabricate micro spiral groove patterns in FDB.

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Periodical:

Advanced Materials Research (Volumes 538-541)

Pages:

1203-1207

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.538-541.1203

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Online since:

June 2012

Authors:

Jung Han Song, Jeanho Park, Jong Sup Lee, Seo Gou Choi, Hye Jin Lee, Jeong Ho Hwang

Keywords:

Desktop Forming System, Fluid Dynamic Bearing, Micro-Forming, Spiral Groove

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References

[1] H.W. Lee, J.H. Song, G.A. Lee, H.J. Lee and K.D. Park, Thread Forming of a Micro Screw for Storage Devices using Finite Element Analysis, Adv. Mater. Res. 264-265 (2011) 1613-1618.

DOI: 10.4028/www.scientific.net/amr.264-265.1613

Google Scholar

[2] Y. Kao, H. Cheng and C. She, Development of an Integrated CAD/CAE/CAM System on Taper-tipped Thread-Rolling Die-plates, J. Mater. Process. Technol. 177 (2006) 98-103.

DOI: 10.1016/j.jmatprotec.2006.04.082

Google Scholar

[3] R. A. Walsh: Handbook of Machining and Metalworking Calculations (McGraw-Hill Professional, NY 2001).

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