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윤영식(Young Sik Yoon),신동우(Dong Woo Shin) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
A ballscrew-linear motion(LM) guide is well-described by its name: it is a LM guide that runs by ballscrew. It consists of LM rail, LM block, end plate, screw, nut and bearing balls. The ballscrew-LM guide has many advantages compared with conventional LM guide. The high efficiency achieved with rolling contact devices permits the employment of antibacklash methods. The balls provide the only physical contact between nut rail and block and ball screw and nut replacing the sliding friction with a rolling motion. The life of the ballscrew-LM is determinated by the balls. The objective of this paper is to introduce the design of the ballscrew-LM with the safety working load.
윤영식 동명정보대학교 1998 東明情報大學校論文集 Vol.1 No.-
The study is concerned in description and analysis of the residential environment of Haeundae New town in Pusan. It aims how the neighborhood is formed through commercial facilities and public facilities, in terms of their location, sort and size, distribution of space, approachment. Those elements have influence on the formation of community area and residential environment. Finally, this study identifies the concepts and elements in the community area in the new-built residential environment for improving the quality of the life.
윤영식(Youngsik Yoon),유승을(Seungeul Yoo),한범석(Beomsuk Han) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
Friction and wear characteristics of two different automotive brake drum materials; conventional cast iron and AI-MMC, were experimentally studied. Friction stability and changes in temperature and torque during drags and stops test were measured by inertial brake dynamometer and wear test system. Brake dynamometer was used to obtain the amount of wear. And wear surfaces were observed by SEM and analyzed by XRD. Also the changes in friction coefficients, temperature and torque were measured by wear test setups under various load conditions. In this study, AI-MMC was shown to be more stable than cast iron in changes of temperature, friction coefficient and torque values; these experiments have been done under various sliding speed or load conditions.