• Journal of the Korean Society for Precision Engineering
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• v.19 no.12
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• pp.150-157
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• 2002

This paper presents an effective cutting force model that enable us to predict the instantaneous cutting force in face milling from a knowledge of the work material properties and cutting conditions. The development of the model is based on the orthogonal machining theory with the effective rake angle which is defined in the plane containing the cutting velocity and chip flow vectors. Face milling testes are performed at different feeds and, a fairly good agreement is shown between the predicted cutting forces and test results.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.252-252
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• 2004

새로운 공작기계나 절삭공구의 설계 및 개선을 위하여 절삭 공정 중 발생되는 절삭력 성분을 정확히 예측하는 것이 필요하다. 절삭 과정에서 절삭력 정보의 중요성은 그동안 공작기계 분야에서 익히 강조되어 왔다. 특히 주 절삭력 정보는 공구 파손을 예측하고 마모를 감지하여 그 밖의 다른 오동작을 검출해 내는 것에 있어서 매우 중요한 것으로 잘 알려져 있다. 최근 공작기계 강성 및 성능의 향상, 고속절삭용 공구의 발전, 금형 산업의 생산성과 정밀도 향상의 요구로 머시닝센터를 중심으로 고속가공에 관한 연구가 활발히 진행되고 있다. (중략)

• Transactions of the Korean Society of Mechanical Engineers
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• v.10 no.6
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• pp.906-915
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• 1986

This study reviewed the theory of acoustic emission applying generation of acoustic emission in metal cutting and proposed a relationship between fundamental cutting parameters and the root mean square (RMS) voltage of the acoustic emission on the basis of the mechanics of the orthogonal cutting operation. Experimental results are presented for 6063-T5 Auminum and the validity of this relationship is evaluated by a series of tests varying cutting speed, feed rate and rake angle in orthogonal cutting. The original formula derived theoretically has been modified in order to utilize independent of fundamental cutting parameters. RMS voltage of acoustic emission depends on cutting speed and strain rate, but it is not much affected by feed rate. Applying lubricant, the drop of RMS level has been observed.

• Transactions of the Korean Society of Mechanical Engineers
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• v.17 no.5
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• pp.1041-1053
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• 1993

A theoretical model to predict the triangular chip formation in cutting with a self-propelled rotary tool is developed. The model is based on the model of transient chip formation in two dimensional orthogonal cutting. The predicted results are found to be in good agreement with the experimental observations and suggest that transient charcteristics of work material, which depend on both cutting conditions and material properties, have the significant influence on triangulation.

• Transactions of the Korean Society of Mechanical Engineers
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• v.17 no.12
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• pp.2926-2935
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• 1993

Chip breaker selection analysis, only being possible through experimental process, was obtained by a applied equation which used an orthogonal cutting model and a basic chip deformation. This equation could present an analysis of the chip breaking phenomena without the use of an actual experimetal method, and it was applied to computer simulation and proved the validity of theory through actual experiments. From these results, an efficient method for finding the optimum conditions of chip breaking was found through an optimized theory being applied to basic program. A finite element model for simulating chip breaking in orthogonal cutting was developed and discussed. By simulation the animation of chip breaking is observed in process on the computer screen.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.270-273
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• 2002

This paper presents an effective cutting force model that enable us to predict the instantaneous cutting force in milling process from a knowledge of the work material properties and cutting conditions. The development of the model is based on the orthogonal machining theory with the effective rake angle which is defined in the plane containing the cutting velocity and chip flow vectors. Face milling tests are performed at different feeds and, a fairly good agreement is shown between the predicted cutting forces and test results.

• Transactions of the Korean Society of Mechanical Engineers
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• v.15 no.1
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• pp.139-144
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• 1991

Chip flow angle is one of the important factors to be determined for the scheme of Chip Control. Up to now, however, a dependable way to predict the chip flow angle in practical cutting has not been established satisfactorily. In this paper a rather simple theoretical prediction of chip flow angle is tried based on some already widely confirmed hypotheses. The developed equation of chip flow angle contains the parameters of depth of cut d, feed rate f, nose radius $r_{n}$ side cutting edge angle $C_{s}$, side rake angle .alpha.$_{s}$ and back rake angle .alpha.$_{b}$. Theoretical results of chip flow angle given by this study bas been shown in a good agreement with experimental ones.s.s.s.s.