http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
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.
오스템퍼링 처리한 구상흑연주철의 절삭시 공구마멸에 관한 연구
전태옥,박흥식,예규현,서영백 동아대학교 공과대학부설 생산기술연구소 1996 生産技術硏究所硏究論文集 Vol.1 No.-
This study was carried out to investigate the character ot cutting tool's wear by acoustic emission(AE) in machining austempered ductile iron(ADI). The following results have been obtained. (1) Ceramic tool among tools of P20, NC123K and ceramic had the best performance in machining ADI materials. (2) As cutting speed increased, the amplitude level of AE signal increased. (3) The In-process detection of cutting tool's wear in able to by use of AE signals. (4) In initial of cutting, surface roughness was large effect to the flank wear to some range.
STS 304강의 분위기온도에 따른 부식마멸기구에 관한 연구
전태옥,박흥식,주창식 대한기계학회 1990 대한기계학회논문집 Vol.14 No.2
This paper is studied to know corrosive wear mechanism of STS304 steel on atmospherical temperature against mating material as the same. The corrosive test was carried out by rubbing the annular surface of two test pieces in distilled water and NaCl aqueous solution. The corrosive wear mechanism was investigated by S.E.M. The experimental results show that there is one Lcr transferring from severe wear to mild wear on change of NaCl concentration and atmospherical temperature, and which is the other still remaining in server wear state. It was found that the critical sliding distance Lcr shorten with increasing NaCl concentration but it is longer with ascending atmospherical temperature and the mild wear state still continues under the condition of high generation rate and elimination rate of the corrosive product. Considering upon the result, the model of corrosive wear mechanism is proposed.
싱글 튜브 시스템 BTA 工具를 使用한 SM55C 鋼의 深孔 加工 特性에 관한 硏究
全泰玉,全彦燦,沈成輔,張性圭 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.2
The BTA deep hole machining has an increasing demand because of its wide applications and its good productivity. The main feature of the BTA drill 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 drills are capable of machining for having large length to diameter ratio in single pass. The study of the accuracy and surface finish of holes produced would reveal quite useful information regarding the process. This thesis deals with the experimental results obtained during single tube system BTA machining on SM55C steel for different machining conditions.
工具刃先의 損傷에 미치는 構成刀先의 生成 및 脫落擧動에 관한 硏究
전태옥,박흥식 동아대학교 공과대학 부설 한국자원개발연구소 1993 硏究報告 Vol.17 No.2
This study was attempted to investigate the effect of the behaviour of built-up edge on tool failure of high speed steel (SKH55) cutting with SS41. The cutting test was carried out with various experimental conditions. The specific cutting force K_(c) and K_(t) (the vertical and radial cutting force) had small values owing to the enlargement of the rake angle below 40m/min of the cutting velocity. The enlargement of the built-up edge affected directly the crater ratio C. The crater wear in the neighbourhood of cutting tool had nothing to do with cutting time and flaten region which had 4㎛ of depth and 0.4㎜ of width was in existence. The micro-hardness distribution in the deepest part of crater was not affected by nearly the cutting time. Through this cutting experiment it is appeared 4 kinds of tool failure according to behavior of the built-up edge in combination of cutting speed and feed.
전태옥,박흥식,예규현 동아대학교 공과대학 부설 한국자원개발연구소 1995 硏究報告 Vol.19 No.2
This study was performed to investigate cutting force characteristics for the purpose of detecting tool wear by variations in cutting force. In this experiment, austempered ductile iron(ADI) is worked by a ceramic tool under finish-machining conditions. The main results obtained are as follows ; 1) In finish machining condition, the magnitude of radial force was the greatest among 3-cutting component forces. 2) The ratio of radial force to tangential force appeared constantly in spite of the variation of cutting condition and nose radius. 3) The ratio of radial force to tangential force increased linearly with respect to tool flank wear width. Thus we knew that tool flank wear is able to detect by the ratio of radial force to tangential force. 4) If tool flank wear exceed by some range, surface roughness decreased with tool flank wear.
全泰玉 동아대학교 공과대학 부설 한국자원개발연구소 1984 硏究報告 Vol.8 No.1
In small feed high speed turning, steel chips do not break by chip breaker. New tool vibration device is developed on which tool vibration some angles periodically and using it breaking of chips is successful which is not able to be broken by usual chip breaker. when a tool vibration periodically, true feed and tool change and also flow direction of chip changes, and so, bending stress of chips goes beyond the breaking stress by bending moment caused by changing of chip flow. This is the reason why chip are broken. In this paper, mechanism of tool vibration device, analysis of periodic vibration motion experiments, flank wear, crater, and mechanism of chip breaking are discusse.
全泰玉 동아대학교 공과대학 부설 한국자원개발연구소 1986 硏究報告 Vol.10 No.1
In this paper, results of tests about practicability of the carbide tools having various tool angles on the light cutting are described. The conclusion is as follows 1. According to the increase of cutting speed, specific cutting force and chip thickness are both decreased. 2. In turning the Al, the borded line between normal and abnormal regions can be obtained in the range of ordinary cutting conditions. 3. According to the increase of rake angel, burr length and thickness are both decreased. 4. The shape of the chip have a large effect on the roughness.