• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.737-738
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• 2016

현재 CNC 공작기계의 대부분은 20~30년 된 구형 가공기가 대부분이며, 이러한 구형 CNC 가공기를 통하여 전산화된 생산관리 시스템의 구현할 수 없다. 때문에 본 연구에서는 구형 CNC 가공기를 전산화할 수 있도록 CNC 가공기에 MSPS(Multi Sensor Processing Station)을 설치하여 구형 CNC 가공기를 전산화 하도록 시스템을 구성하였다. 그러나 기존의 신형 CNC 가공기의 대부분은 FANUC사의 FOCAS Library를 기반으로 구성되어 있다. 본 논문에서는 기존의 FANUC사의 FOCAS Library 기반으로 개발되어 있는 생산관리 시스템에 추가로 적용할 수 있도록 MSPS 기반의 구형 CNC 가공기 통신 프로토콜을 설계하여 신형 및 구형 CNC 가공기도 동시에 전산화 하여 관리할 수 있는 시스템을 제안하고자 한다.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2001.04a
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• pp.393-398
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• 2001

This paper aims to work process of connecting rod die using CAD/CAM/CNC systems. CAD/CAM/CNC systems are consist of CAD(MDT4.0), CAM(Z-MASTER) software and CNC milling machine. CAM software is purpose to G-code generation for CNC programming. Then CAM software and CNC milling machine are connect to RS-232-C cable for data network.

• The Journal of Korean Institute for Practical Engineering Education
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• v.2 no.1
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• pp.58-63
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• 2010

The purpose of this study is to establish a knowledge based system for education of CNC machining. The program is made based on various educational courses, teaching methodology and teaching medium etc. and has a good accessibility which can be used anywhere if computer is available. For the system, various variables according to materials, tools or shapes for machining are reviewed and analyzed. Also, the intelligent educational program is developed using Visual Basic language. It can be used to help trainees who want to refer cutting conditions for actual cutting process and also can be useful for beginner who wants to learn and to practice for CNC machining.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.06a
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• pp.101-102
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• 2009

• Journal of the Korea Convergence Society
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• v.13 no.2
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• pp.249-255
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• 2022

This study proposed an analysis framework for real-time prediction of CNC processing defects using machine learning-based models that are recently attracting attention as processing defect prediction methods, and applied it to CNC machines. Analysis shows that the XGBoost, CatBoost, and LightGBM models have the same best accuracy, precision, recall, F1 score, and AUC, of which the LightGBM model took the shortest execution time. This short run time has practical advantages such as reducing actual system deployment costs, reducing the probability of CNC machine damage due to rapid prediction of defects, and increasing overall CNC machine utilization, confirming that the LightGBM model is the most effective machine learning model for CNC machines with only basic sensors installed. In addition, it was confirmed that classification performance was maximized when an ensemble model consisting of LightGBM, ExtraTrees, k-Nearest Neighbors, and logistic regression models was applied in situations where there are no restrictions on execution time and computing power.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.04b
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• pp.463-470
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• 1995

설계, 가공, 조립, 검사기술로 대표되는 생산시스템의 근간 기술은 공작기계에 의한 부품가공 소위, 기계 가공 기술이다. 가공에 필요한 NC 프로그램의 효율적인 관리를 위해 이용되던 종래의 DNC(Direct Numerical Control) 는 가공 Cell 의 효율을 높이기 위해, CNC 가공기 및 주변기기에 대한 실시간 감시/제어기능을 가진 분산제어시스템( DNC(Distributed Numerical Control)으로 발전하고있다. 본 연구에서는 이기종 CNC로 이루어진 가공 Cell에 적합 하고, 경제성, 범용성 및 확장성을 고려하여 RS485 Network 및 RS232C를 이용하여각 CNC 공작기계 및 주변기기와 연결 해서 실시간(Real Time) 동시작업(Multi Tasking) 가능한 DNC 시스템을 개발하였다.

• Proceedings of the KAIS Fall Conference
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• 2003.06a
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• pp.129-132
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• 2003

CNC가공의 절삭공정에 대하여 명료한 분석이 되어있지 않아서 다양한 절삭조건에서의 가공결과를 예측하기가 힘들기 때문에, 최적의 절삭조건 결정 및 공구선택에 대한 체계적인 기술이 정립되어 있지 않다. 따라서, 본 연구에서는 CNC 가공기인 머시닝센터 및 고속가공기를 이용한 엔드밀 절삭가공시 요구되는 일반적인 사항들을 고찰하고, 엔드밀 공정의 가공성능 향상을 위한 절삭조건결정 방식을 지적인 결정에 의하여 선택하도록 하는 사용자 친화적 지적결정 시스템을 개발하였다.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.19 no.5
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• pp.678-683
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• 2010

The drum cam with rotational follower is used to apply the ATC and index table of machine tools and it has the merit of minimizing the backlash. In general, to machine the drum cam with rotational follower, 5-axis CNC machine must be used and its kinematic principle must be included in modeling on CAM. So, the commercialized CAM software can't be applied to this machining of drum cam. Though some special software for machining drum cam was developed, it could be applied to special 5-axis CNC machine tools and the finish machining module was not applied. To solve this problem, this study includes the induction of the post processing algorithm for the rough machining of drum cam on several 5-axis CNC machine tools, type AC, AB and Be. The finish machining software will be treated in next study. A sample drum cam was machined on 5-axis CNC machine tool of AC type. The designed geometric profile of drum cam consist to the measured profile after machining well. This post processing algorithm for rough machining of the drum cam was clearly verified.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 1999.10a
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• pp.269-274
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• 1999

This paper aims to DNC application of car fuel tank die working. DNC system is consist of CAD, CAM software and CNC milling machine. CAM software is purpose to G-code generation for CNC programming. Then CAM software and CNC milling machine are connect to RS-232-C cable for networking.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2001.04a
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• pp.83-88
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• 2001

In order to suggest the proper optimal conditions of the CNC milling machining for the Thin-wall surface, some experiments were carried out. The process was applied in the aerospace industry for the machining of light alloys, notably aluminium. In recent year, however, the mold and die industry has begun to use the technology for the production of components, including those manufactured from hardened tool steels. And the end mill is an important tool in the milling process. A typical example for the end mill is the milling of pocket and slot in which a lot of material is removed from the workpiece. Therefore the proper selection of cutting parameter for end milling is one of the important factors affecting the cutting cost. In this paper, we choose the optimal parameters(cutting forces) to cut thin-walled Al part by experiment.