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Registration 오차감소를 위한 3차원 비접촉식 측정용 Fixture 개발
김연술(Yeun Sul Kim),진영주(Young Ju Jin),이희관(Hi Koan Lee),양균의(Gyun Eui Yang) Korean Society for Precision Engineering 2005 한국정밀공학회지 Vol.22 No.10
This paper presents a method to reduce errors in registration, which is used in transformation coordinate system of the multiple measuring data. In general, the ICP algorithms and feature-based approaches are used for registration. In order to measure wrap-around object, it is necessary to change the scanning direction or set-up of the object. A fixture is made to reduce registration errors caused by inaccurate center point of tooling balls, providing the more accurate registration method. And, the motorized fixture controls rotation and tilting to get precise the measuring data and registration. The proposed motorized fixture and registration method have advantages in accurate registration and precise measurement, compared with the conventional methods.
이희관,김연술,김도형,노상흡,양균의,Lee, Hi-Koan,Kim, Yeun-Sul,Kim, Do-Hyung,Roh, Sang-Heup,Yang, Gyun-Eui 한국기계가공학회 2003 한국기계가공학회지 Vol.2 No.4
This paper presents the formed tool to machine a milli-structure mold. The formed tool is used to machine the geometrical shape of bearing rubber seal for precision machining. The bearing rubber seal has milli-sized complex geometry. Because it is difficult to machine the unique shape exactly by the conventional tool, the formed tool is used in machining die of the bearing seal. In this paper, it is performed to investigate properties of the formed tool; tool wear, cutting force and machined surface roughness. Tool wear increases rapidly with clearance angle Increase. Thus, the dimension accuracy is affected by the clearance angle.
툴링볼을 이용한 레지스트레이션시 오차 감소에 관한 연구
홍성균(Sung-Kyun Hong),김연술(Yeun-sul Kim),이희관(Hi-Koan Lee),공영식(Young-Sik Kong),양균의(Gyun-Eui Yang) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
This study proposes a method to reduce errors in registration using tooling balls. The method consists of 2 stages. First the data loss of the tooling ball affects calculating the tooling ball center. A z-direction compensation is given to calculate more accurate registration points. Second, three points are used to determine a transformation matrix on each frame. As merging, the maximum error usually lies on the third tooling ball in the conventional method selecting a point among three points randomly. We find the centroid of 3 points and apply it to determine a new transformation matrix.
Insert type 총형공구 여유각 영향에 따른 베어링 Rubber Seal 금형의 가공성 평가
Li-Hai Li,김연술(Yeun-Sul Kim),김도형(Do-Hyung Kim),양균의(Gyun-Eui Yang),문상돈(Sang-Don Moon) 한국생산제조학회 2004 한국생산제조시스템학회 학술발표대회 논문집 Vol.2004 No.4
Formed insert type tool satisfy both the surface roughness and geometric accuracy, so that cutting edge of formed tool can duplicate final feature. For experiment, the formed tools with various clearance angles are machined. And the tools are evaluated with respect cutting force, flank wear and surface roughness to optimistic condition.
총형공구를 이용한 베어링 Rubber Seal 금형가공에 관한 연구
노상흡(Sang-Heup Roh),이희관(Hi-Koan Lee),김연술(Yeun-Sul Kim),김도형(Do-Hyung Kim),양균의(Gyun-Eui Yang) Korean Society for Precision Engineering 2004 한국정밀공학회지 Vol.21 No.2
The formed tool is used to machine the geometrical shape of bearing rubber seal efficiently. The bearing rubber seal has complex geometry for the complicated geometrical shape to prevent leakage of lubricant oil and influx of the dust effectively. Because it is difficult to machine the unique shape exactly by the conventional tool, the formed tool is used in machining a rubber seal die. In this paper, It is performed to investigate machining characteristic of the formed tool; cutting edge wear, cutting force, and surface quality. Also, an efficient precision machining condition is proposed, and the inspection results of rubber seal with CAl are discussed.
Insert type 총형공구 여유각 영향에 따른 베어링 Rubber Seal 금형의 가공성 평가
Li, Li-Hai,김연술,김도형,양균의,문상돈 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
Formed insert type tool satisfy both the surface roughness and geometric accuracy, so that cutting edge of formed tool can duplicate final feature. For experiment, the formed tools with various clearance angles are machined. And the tools are evaluated with respect cutting force, flank wear and surface roughness to optimistic condition.