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고속주축의 냉각조건과 후반부 냉각 유무에 따른 열특성 연구
최대봉(Dae-Bong Choi),김수태(Soo-Tae Kim),이석준(Seog-Jun Lee),김창용(Chang-Yong Kim) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.1
The important problem in high speed spindle is to reduce and minimize the thermal effect by motor and bearing. This paper presents the thermal characteristic analysis for a high speed spindle with and without cooling at the rear part, considering the viscosity and the flow rate of cooling oil. A high speed spindle is composed of angular contact ceramic ball bearings, high speed built-in motor, oil jacket cooling and so on. The thermal analyses of high speed spindle need to minimize the thermal effect and maximize the cooling effect and they are carried out under the various cooling conditions. Heat generations of the bearing and the high speed motor are estimated from the theoretical and experimental data. This result can be applied to the design and manufacture of a high speed motor spindle.
최대봉(Dae-Bong Choi),노승국(Seung-Kook Ro),신영재(Young-Jae Shin),김수태(Soo-Tae Kim) 한국기계가공학회 2006 한국기계가공학회 춘추계학술대회 논문집 Vol.2006 No.-
The rubber rollers for color print must be cut precisely. The special purpose cylindrical grinding machine with a wide width grinding wheel is used to get the high-quality and productivity increasing for the rubber rollers. It is important to know the characteristics of the rubber roller grinding machine for more the high-quality rubber rollers. The special purpose rubber roller grinding machine has the compact structure and the spindle easy to assemble after balancing for high-speed grinding. Therefore, the dynamic and thermal characteristics of the rubber roller grinding machine are measured and evaluated. The surface configuration of the grinded rubber rollers was compared to the raw rubber rollers.
최대봉(Dae-Bong Choi),김수태(Soo-Tae Kim),노승국(Seung-Kook Ro),조현택(Hyun-Taek Cho) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.2
High speed machining is the core technology that influences the performance of machine tools, and the high speed motor spindle is widely used for the high speed machine tools. The important problem in high speed spindle is to minimize the thermal effect by motor and bearing and frequency effect. This paper presents the thermal characteristic analysis and frequency experiment for a high speed spindle considering the flow rate of cooling oil. A high speed spindle is composed of angular contact ceramic ball bearings, high speed built-in motor, oil cooling jacket and so on. The thermal analyses of high speed spindle need to minimize the thermal effect and maximize the cooling effect and they are carried out under the various cooling conditions. Heat generations of the bearing and the high speed motor are estimated from the theoretical and experimental data. To find out the characteristic of vibration, the high speed spindle is excited in operational range. This result can be applied to the design and manufacture of a high speed tapping spindle.
최대봉(Dae-Bong Choi),유기한(Ki-Han Yu),김수태(Soo-Tae Kim) 한국기계가공학회 2008 한국기계가공학회 춘추계학술대회 논문집 Vol.2008 No.-
High speed machining is the core technology that influences the performance of machine tools, and the high speed motor spindle is widely used for the high speed machine tools recently. The important problem in this spindle is to reduce and minimize the thermal effect by motor and bearing. This paper presents the thermal characteristics analysis of a high speed motor spindle system consisted of angular constant ball bearings and built-in motor with oil-jet lubrication. The analysis of thermal characteristic of spindle is performed according to the oil-jet lubrication by using finite element method. This result can be applied to the design and manufacture of the high speed spindle.