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Compensation of Tool Deflection in Micromilling Using Workpiece Holder Control Device
허세곤,이민규,김성현,이원균,민병권 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
This paper presents a real-time tool deflection compensation technique to improve micromilling machining accuracy. Lateral and axial errors of the cutter location (CL) caused by tool deflection were estimated using the cutting force and compensated by applying an additional feed to the workpiece that is equivalent to the estimated CL errors. To evaluate the proposed method, a workpiece holder comprising a three-axis stage and a tool dynamometer was installed on the work table of a machine tool. A proportional derivative (PD) position controller with a model-based tool deflection estimator was designed and implemented on a real-time computer to control the workpiece holder. Lateral and axial machining errors in side milling and radii errors in circular slot milling are discussed to demonstrate the effect of tool deflection compensation.
허세곤(Segon Heo),김웅(Woong Kim),민병권(Byung-Kwon Min) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
Thermal analysis of electrical discharge machining (EDM) of polycrystal diamond (PCD) materials using finite element method is proposed. Material structure model for PCD were developed. Heat transfer and temperature of PCD material caused by a single discharge were simulated. The simulation results demonstrate that diamond particles are detached because of melting of the cobalt layer.