• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2001.06a
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• pp.73-84
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• 2001

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2001.06a
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• pp.39-52
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• 2001

• 기계와재료
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• v.15 no.3 s.57
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• pp.84-89
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• 2003

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.05a
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• pp.94-99
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• 2002

KS and ISO have proposed several evaluation methods of conventional machine tools. Even though the accuracy of the tools can be evaluated with these methods, there are still no proper evaluation methods of high speed machining. Because it is hard to evaluate characteristics of high speed machining such as decrease of cutting temperature, cutting force, and reduced machining time. Therefore, new evaluation method for high speed machine should be developed. In this paper, several shapes of model have been proposed to evaluate cutting accuracy of high speed machine.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.9 no.2
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• pp.1-5
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• 2010

According to the high demand of hybrid components, the hybrid materials development and processing technology were increased in the industry field. Although hybrid materials have various machining technologies, the research about them has rarely been proceed. This study is to carry out results about design technology of miniaturized high-speed air spindle and machining characteristics of hybrid materials using that. We studied machining characteristics in Nickel-Chrome alloy(Ni-Cr) according to change rotating speed using miniaturized high-speed air spindle. As the following results, the change of surface shape and roughness was investigated as the processing conditions such as rotating speed of miniaturized high-speed air spindle.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.992-995
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• 2001

Several evaluation methods of conventional machine tools have been proposed by KS and ISO. Even though the accuracy of the tools can be evaluated with those methods, there are still no proper evaluation method of high sped machining. Because it is hard to evaluate characteristics of high speed machining such as decrease of cutting temperature, cutting force, and reduced machining time. Therefore, new evaluation method for high speed machine should be developed. In this paper, several shape of model have been proposed to evaluate cutting accuracy of high speed machine.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.04a
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• pp.965-969
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• 1997

Due to the high feed rate,high speed machining (HSM) provide a great potential of rationalization for the machining Dies and Moulds. But determination of cutting condition is very difficult, because cutting mechanism of high speed machining is very complicated,especially using ball end-mill. This paoer gives a report on selection of the optimal cutting condition to improve the machining efficiency, And optimal machining condition is determined through the cutting force, FFT analysis of cutting force and surface roughness according to the cutting condition. Based on this experiment result,wear process and machining characteristics are evaluated.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.3 no.3
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• pp.32-38
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• 2004

Recently, the system of high speed milling(HSM) is widely used for reducing the operation time and maximizing efficiency of work. The most research of high speed milling system is still leaves much to be desired. Specially the research of mass pocket high speed processing with high precision is the first and probably the last. So this paper showed mass pocket processing of high precision with a duralumin and then confirmed a cause of inferior goods through the CAD/CAM pattern simulation and experimentation. And this paper showed high speed processing system reduce the rate of inferior from this optimal pattern.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.13 no.6
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• pp.111-118
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• 2014

Aluminum lithium alloys are new materials developed for lightweight aircraft parts. However, as compared with conventional aluminum alloys in high-speed machining, problems such as tool wear, machining distortion, and cutting ability arise. This study presents the machining distortion characteristics of an Al-Li alloy wing tip in relation to the cutting heat in high-speed machining. A machining experiment was conducted with high-speed machining equipment for an evaluation of the machining distortion characteristics, with each machining stage temperature change of the workpiece machining surface, and the inside and outside temperature changes of the equipment measured. By measuring the amount of distortion of the workpiece before and after machining, the cutting heat was analyzed with regard to its effect on machining distortion in the product.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1993.04b
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• pp.117-120
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• 1993

기게공업의 근간이라고 할 수 있는 공작기계산업은 첨단산업과 관련한 소재공업의 고도화에 따라 고속 고능률화 및 고정밀화 하여 가는 추세에 있으며 이에대한 성능향상 요구는 앞으로도 계속적으로 이어질것이다. 여기서 공작기계의 가공정밀도 및 가공 능률에 결정적인 영향을 주는 요소는 대부분 주축유닛트 부분이며 최근과 같이 고속 고정밀과 유연성을 추구하는 공작기계에서 주축 시스템이 수행하는 역할이란 매우 중요한 위치를 갖는다. 본 연구는 모터내장형 주축시스템에 관해 정.동적측면에서의 구조설계와 시제품에 대한 평가를 수행하여 활용측면에서의 신뢰성을 높일 수있도록 하는 것을 주요 내용으로 하였다. 즉 연구의 첫단계로서 정적인 측면에서의 구조설계를 하여 연구모델을 결정하였으며 다음단계로서 설정된 구조모델에 대해 유한요소 법(FEM)을 이용한 동적해석을 실시하고 실험해석에 의한 이론해석 과정의 수학적모델을 수정,보완한후 고속회전에서의 동적특성을 실제 현상에 가깝도록 예측하여 설계단계에서의 고속운전특성이 주축계의 동적안정성에 미치는 여러 영향등에 관해 고찰하였다.