윤활유 종류에 따른 주축 열변위의 특성 평가

강순준,이갑조,김종관 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.2

High speed precision machines have been introduced to the CNC industry in order to improve productivity, shorten the appointed date of delivery and reduce the prime cost. High speed machines have more functions then general maches, and they were proved in performance. The production and sales of the high speed machines have been increased not only in domestic market but also all over the world. Accordingly, machines are faster, there are lots of problems to be solved. One of the most difficult problems is the thermal displacement on the main spindle due to generated heat while the spindle is rotated in high speed. Since the thermal displacement directly effects the quality of the machined parts, utmost efforts to minimize the thermal displacement have to be given from the beginning of designing machines. In practice, variety of methods are attempted and practiced to minimize the thermal displacement such as design of symmetrical lime, adoption of high speed bearings. application of compensation system using non-contact sensor and use of forced circulating lubrication system with oil cooler. Even if these variable methods have been practically used in the industrial field, generated heat has not been perfectly prevented. Hence, in this pager, the characteristics of thermal displacement were investigated when several kinds of oil were tested for a high speed machine with forced circulating lubrication system within the same atmosphere and under the same conditions.

윤활유 종류에 따른 주축 열변위의 특성 평가

강순준,이갑조,김종관 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-

High speed precision machines have been introduced to the CNC industry in order to improve productivity, shorten the appointed date of delivery and reduce the prime cost. High speed machines have more functions then general machines, and they were proved in performance. The production and sales of the high speed machines have been increased not only in domestic market but also all over the world. Accordingly, machines are faster, there are lots of problems to be solved. One of the most difficult problems is the thermal displacement on the main spindle due to generated heat while the spindle is rotated in high speed. Since the thermal displacement directly effects the quality of the machined parts, utmost efforts to minimize the thermal displacement have to be given from the beginning of designing machines. In practice, variety of methods are attempted and practiced to minimize the thermal displacement such as design of symmetrical frame, adoption of high speed bearings, application of compensation system using non-contact sensor and use of forced circulating lubrication system with oil cooler. Even if these variable methods have been practically used in the industrial field, generated heat has not been perfectly prevented. Hence, in this paper, the characteristics of thermal displacement were investigated when several kinds of oil were tested for a high speed machine with forced circulating lubrication system within the same atmosphere and under the same conditions.

초정밀 절삭가공에서 표면거칠기 특성 평가

강순준,이갑조,김종관 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-

In this study, experiments were conducted with an ultra-precision machine, developed in domestic, to find the characteristics and the most suitable cutting conditions of ultra-precision machining. To maximize the performance of the machine, the machine was installed in a room that is protected from vibration and is maintained constant temperature and constant humidity. Selected work pieces are an aluminum-alloyed material, which has excellent corrosion resistance and has low deformation. The used tool is synthetic poly crystal diamond, which has excellent abrasion resistance and has low affinity. Four types of tool nose radius were used such as 0,0.1, 0.2 and 0.4㎜. Machining is performed with cutting speed of 500, 800 and 1000m/min., feed rate of 0.005, 0.008, 0.010㎜/rev. and cutting depth of 0.0005, 0.0025 and 0.005㎜ respectively which can generally be used in the field as a cutting condition. As a method of evaluation, surface roughness was measured for each cutting condition, and reciprocal characteristics are computed for each tool nose radius, cutting speed, feed rate and cutting depth. As a result, the most suitable cutting condition and characteristics of ultra-precision machining were identified which can usefully be applied in the industrial field.

SEM 측정법에 의한 초정밀 표면가공 특성연구

강순준,오상록,이갑조,김종관 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-

The purpose of this paper is to look at the characteristics of surface finishing which is one of the form accuracies and to obtain the fundamental technical data from the process of machining with diamond tool through experiment and theoretical analysis. The experiments were conducted with domestic made ultra-precision machine and MCD·PCD tool, with aluminum alloyed material and brass being used for the work pieces. The goal of the size accuracy was set to 100nm. The most suitable tool nose radius and machining conditions were selected, and the variations of the surface roughness were observed using SEM method while machining the distance of up to 500km. These data were evaluated and they examined the variation of the machined surfaces while cutting up to 500km of machining distance. At the same time, the state for the wear of diamond tool nose was analyzed and carefully examined through the newest measuring device. Additionally, the characteristics of ultra-precision machining technology were studied through visual analysis.

초정밀 절삭가공에서 표면거칠기 특성 평가

강순준,김종관 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.1

In this study. experiments were conducted with an ultra-precision machine. developed in domestic. to find the characteristics and the most suitable cutting conditions of ultra-precision machining. To maximize the performance of the machine, the machine was installed in a room that is protected from vibration and is maintained constant temperature and constant humidity. Selected work pieces are an aluminum-alloyed material, which has excellent corrosion resistance and has loll deformation. The used tool is synthetic poly crystal diamond, which has excellent abrasion resistance and has low affinity, Four types of tool nose radius were used such as 0. 0.1, 0.2 and 0.4mm. machining is performed with cutting speed of 500, 800 and 1000m/min. feed rate of 0.005, 0.008, 0.01mm/rev. and cutting depth of 0.0005, 0.0025 and 0.005mm respectively which can generally be used in the field as a cutting condition. As a method of evaluation, surface roughness was measured for each cutting condition. and reciprocal characteristics are computed for each tool nose radius. cutting speed, feed rate and cutting depth. As a result. the most suitable cutting condition and characteristics of ultra-precision machining were identified which can usefully be applied in the industrial field.

초정밀 절삭가공에서 표면거칠기 특성 평가

강순준(Kang Soon Joon),이갑조(Lee Kab Jo),김종관(Kim Jong Kwan) 한국생산제조학회 2003 한국생산제조시스템학회 학술발표대회 논문집 Vol.2003 No.10

SEM 측정법에 의한 초정밀 표면가공 특성연구

강순준(Soon-Joon Kang),오상록(Sang-Lok Oh),이갑조(Gab-Jo Lee),김종관(Jong-Kwan Kim) 한국생산제조학회 2004 한국생산제조시스템학회 학술발표대회 논문집 Vol.2004 No.4

The purpose of this paper is to look at the characteristics of surface finishing which is one of the form accuracies and to obtain the fundamental technical data from the process of machining with diamond tool through experiment and theoretical analysis. The experiments were conducted with domestic made ultra-precision machine and MCDㆍPCD tool, with aluminum alloyed material and brass being used for the work pieces. The goal of the size accuracy was set to 100㎚. The most suitable tool nose radius and machining conditions were selected, and the variations of the surface roughness were observed using SEM method while machining the distance of up to 500㎞. These data were evaluated and they examined the variation of the machined surfaces while cutting up to 50㎞ of machining distance. At the same time, the state for the wear of diamond tool nose was analyzed and carefully examined through the newest measuring device. Additionally, the characteristics of ultra-precision machining technology were studied through visual analysis.

윤활유 종류에 따른 주축 열변위의 특성 평가

강순준(Kang Soon Joon),이갑조(Lee Gab Jo),김종관(Kim Jong Kwan) 한국생산제조학회 2003 한국생산제조시스템학회 학술발표대회 논문집 Vol.2003 No.4

AFM 측정법에 의한 황동의 초정밀 가공면 특성 연구

이갑조(Gab-Jo Lee),정종수(Jong-Soo-Jung),강순준(Soon-Joon Kang),김상복(Sang-Bok Kim),김종관(Jong-Kwan Kim) 한국기계가공학회 2006 한국기계가공학회 춘추계학술대회 논문집 Vol.2006 No.-

The machining parts must be produced within the specification of drawing and those will be able to meet function and efficiency. At that time, it is very important not only precision machine and machining technique but also the measurement technique. So, the improvement of measurement technique is to be joined together at once with improvement of machining technique. Finally, the quality and value of the parts are decided by precision measurement. This paper aims to study on the machined surfaces characteristics of brass by AFM measurement. The objective is contribution to ultra-precision machining by exhibit foundation data of surface roughness and tool wear when parts are cutting with diamond tool at the factory.