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A Study on the Con-focal Microscope for the Surface Measurements  

강영준 (전북대학교 기계항공시스템 공학부)
송대호 (전북대학교 공과대학원 기계설계학과)
유원재 (전북대학교 공과대학원 기계설계학과)
백성훈 (한국 원자력 연구소)
Publication Information
Journal of the Korean Society for Precision Engineering / v.20, no.5, 2003 , pp. 73-81 More about this Journal
Abstract
In case of hollow cylinder extrusion using porthole die, the effects of extrusion parameters-temperature, the speed of extrusion, the shape of the die and mandrel-on metal flow in porthole die extrusion of aluminum have been investigated. However, there have been few studies about condenser tube extruded by porthole die. Original metal flow of condenser tube by porthole die extrusion is similar to hollow cylinder extrusion but the estimation of metal flow for extrusion parameters is different. For example, variation of chamber length in hollow extrusion only affects the welding pressure, however, the welding chamber length in condenser tube extrusion influences to the welding pressure as well as the deflection of mandrel. This study was designed to evaluate metal flow, welding pressure, extrusion load, tendency of mandrel deflection according to angular variation in the bottom of chamber in porthole die. Estimation was carried out using finite element method in as non-steady state. Analytical results can provide useful information the optimal design of porthole die.
Keywords
Surface Measurements; Con-focal Microscope(CFM);
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