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전태옥,배춘익,Jun, Tae-Ok,Bae, Choon--Eak 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.1
Temperature distribution on the flank face in orthogonal turning with cutting tool of high speed steel is studied by using a finite element method and experiments. Experiments are carried out to verify the validity of the temperature measurement by using a thermoelectric couple junciton imbedded in a cutting tool of high speed steel. Good agreement is obtained between the analytical results and the experimental ones for the temperature distributions on flank face of cutting tool with igh speed steel. The analytical results show that the temperature on the top flank face of a tool is higher because of the difference of the friction velocity on each face of the tool.
전태옥,박흥식,예규현,Jun, Tae-Ok,Park, Heung-Sik,Ye, Guoo-Hyeon 한국정밀공학회 1992 한국정밀공학회지 Vol. No.
This study was undertaken to investigate the cutting behaviour of super duralumin (A2024-T3) with sintered carbide tool(P20). The cutting test was carried out under different conditions such as cutting speed, cutting depth and rake angle, etc. The specific cutting force Kc and Kt of vertical and radial forces decreases as cutting speed increases, especially the decrease rate of Kt becomes larger than of Kc as cutting speed increases. Kc and Kt in small cutting depth are much affected by work-hardening of surface layer. The chip width and shear angle become layer as cutting depth increases, especially chip width at feed of 0.1mm almost approaches cutting width. Relation between the friction coefficient of chip side and tool rake angle side can make the modelization studying the built-up edge size. The shear angle model equation of super duralumin generally agree with theory of Ernst-Merchant.
G.F.R.P체소시(切素時) 공구마모(工具摩耗)에 관한 연구(硏究)
전태옥 ( Tae Ok Jun ),전철호 ( Chul Ho Jun ),주원식 ( Won Sik Ju ) 東亞大學校附設 石堂傳統文化硏究院 1980 石堂論叢 Vol.4 No.-
G.F.R.P. is widely used in the industry as materials of parts of various precesion instruments because of excellent mechanical properties, water proof, endurance of drugs, corrosion resisting, heat insulation and separation. Therefore it is recently demanded the necessary of cutting work as well as forming in the extreme, but the tool wear greatly occurs in cutting of G.F.R.P. and it is depended upon the cutting conditions; cutting speed, cutting distance and too angle. This study has analysised and examined the tool wear measured by the model formular of tool wear and experiments. The main results obtained are as follows. 1. Approximate wear value of the model formular of tool wear almost approaches to value measured by experiments. 2. The edge wear is varied with the direction of Glass Fiber. 3. The wear of cutting edge is nearly increased proportion to the cutting distance.
싱글튜브시스템 BTA공구에 의한 박용부품소재의 CNC 심공가공 특성에 관한 연구
전태옥(Tae-Ok Jun),전언찬(Eun-Chan Jun),심성보(Sung-Bo Sim),장성규(Sung-Gyu Jang) 한국해양공학회 1994 韓國海洋工學會誌 Vol.8 No.1
The BTA(boring and trepanning association) deep hole machining has an increasing demands because of its wide applications and its good productivity.<br/> The main feature of the BTA tools is that the tool cutting edges are unsymmetrically located on the boring head. This provides a stabilizing cutting force resultant necessary for self guidance of the boring head. The BTA tools are capable of machining for having a large length to diameter ratio in single pass.<br/> A study of the accuracy and surface finish of holes produced would reveal quite useful information regarding the process. This study deals with the experimental results obtained during BTA machining on SM55C, SM45C steel under different machining conditions.