• Proceedings of the Korea Information Processing Society Conference
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• 2013.05a
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• pp.1113-1115
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• 2013

NC 포스트프로세서는 CAD/CAM시스템에서 생성된 공구경로데이터 파일을 입력받아 NC공작기계를 구동시킬 수 있는 공작기계 제어데이터 파일로 변환해 주는 소프트웨어이다. 본 논문에서는 범용 NC 포스트프로세서를 웹에서 실행될 수 있도록 구현한 내용을 기술하고 있다. 사용자가 웹에 접속하여 NC 콘트롤러의 사양 및 매개변수를 설정해주면 절단에 사용할 NC파일이 자동 생성된다. 개발된 본 시스템을 사용하면 고가의 전용 NC 포스트포로세서 구입에 소요되는 비용을 줄일 있어 생산성 향상에 기여할 수 있다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.591-594
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• 2002

Generating NC-code from 3D part model needs a lot of effort to make many decisions, including machining area, tool change data, tool data, cutting condition, etc., by using either manual or computer aided method. This effort can be reduced by integration of automated process planning and NC-code generation. In case of generating NC code with a help of the process planning system, many data mentioned from the process planning can be used. It means that we can create NC-code about a full part. In this study, integration of FAPPS(Feature based Automatic Process Planning) with a NC-code generating module is described and additional data to adapt NC-code for machine shop is discussed.

• Transactions of the Korean Society of Mechanical Engineers
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• v.16 no.1
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• pp.156-161
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• 1992

In this research a monitoring system for turning using NC information and the current of feed motor as a monitoring signal was developed. The overall system consists of modules such as learning process, NC data transmission, generation of forecast information, signal acquisition, monitoring and post process. In the learning process, the reference data and the cutting force equation necessary for monitoring are obtained from the accumulated monitoring results. In the generation of forecast information, the information of forecasted cutting forces is acquired from the cutting force equation and NC program and appended to each NC block as a monitor code. Reliability of monitoring is improved by using the monitor code in the real-time monitoring. Monitoring module is divided into two parts : the off-line monitoring where errors of NC program are checked and the on-line monitoring where the level of motor current is monitored during cutting operations. If the actual current level exceeds the limit value provided by the monitor code in the level monitoring, it is recognized as abnormal. In the event of abnormal status, the post processor sends the emergency stop signal to NC controller to stop the operation. Actual experiments have shown that the developed monitoring system works well.

• Journal of the Korean Society for Precision Engineering
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• v.19 no.2
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• pp.26-32
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• 2002

• Journal of Korea Society of Industrial Information Systems
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• v.12 no.1
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• pp.46-53
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• 2007

NC (Numerical Control) code for the tool path needs to be generated efficiently for machining of free form pockets with arbitrary wall geometry on a three axis CNC machine. The unified rough and finish cut algorithm and the tool motion is graphically simulated in Part 1. In this paper, a grid based 3D navigation algorithm simulated in Part 1 for generating NC tool path data for both linear interpolation and a combination of linear and circular interpolation for three-axis CNC milling of general pockets with sculptured bottom surfaces is experimentally performed and verified.

• Journal of Korea Society of Industrial Information Systems
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• v.9 no.1
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• pp.7-16
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• 2004

The tool path needs to be determined in an efficient manner to generate the final NC (numerical control) code for efficient machining. This is particularly important in machining free form pockets with an arbitrary wall geometry on a three-axis CNC machine. Many CAD/CAM systems use linear interpolation to generate NC tool paths for curved surfaces. However, this needs to be modified to improve the smoothness of the machined bottom surface, reduce machining time and CL (cutter location) file size. Curved machining can be a solution to reduce these problems. The unified rough and finish cut algerian and the tool motion is graphically simulated. In this paper, a grid based 3D navigation algorithm for generating NC tool path data for both linear interpolation and a combination of linear and circular interpolation for three-axis CNC milling of general pockets with sculptured bottom surfaces is developed.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.05a
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• pp.257-264
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• 2004

분산 제조 시스템간의 협업을 가능케 하는 e-Manufacturing paradigm 의 성공을 위해서는 CAD-CAM-CNC chain 의 제조 분야뿐만 아니라 SCM, ERP, CRM 등의 상위 시스템과의 제품 및 가공 정보의 원활한 흐름이 필수적이다. STEP 과 STEP-NC 는 이를 해결할 표준으로 자리매김 할 것으로 기대되고 있다. 본 논문은 STEP-NC 의 국내 promotion 차원에서 참고문헌 [1]의 밀링용 파트프로그래밍 소개에 이어: 1) 선반용 데이터 모델, 2) 선반용 파트 프로그램의 작성 방법, 3) XML 을 이용한 파트 프로그램의 표현 방법들을 소개하고, 4) STEP-NC 기반의 생산 환경 구축을 위한 방안을 기술하였다.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.512-515
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• 2006

This paper proposes the solution of compatibility problem between heterogeneous by converting automatically CAD data into proper data for the PCB board production process by using IC item information. This paper has a purpose of maximizing work efficiency with NC Programming automation and contributing to maximize productivity by NC program conversion of different Mounters and Mounter Data & Line Balance optimization.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.691-692
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• 2014

본 논문에서는 전용의 NC 포스트프로세서를 범용의 NC포스트프로세서로 설계하고 이를 클라우드 컴퓨팅환경에서 기업에 서비스 하는 방법을 제안한다. NC 포스트프로세서를 인터넷 기반의 클라우드 환경으로 이행하는 것은 사용자 인터페이스와 프로세서 엔진이 분리되어 각각이 사용자 PC, 그리고 클라우드 환경에 설치되고, 이 두 모듈 사이를 네트워크로 묶어주는 구조이다. 이러한 구조는 기존의 서버-클라이언트 구조 혹은 데스크탑 가상화 등에 따른 어플리케이션의 네트워크와는 차별화되며, 사용자 인터페이스의 배포 및 이를 운용하기 위한 웹환경의 구축, 그리고 클라우드 컴퓨팅 환경에서의 NC 포스트프로세서 엔진의 운용 등이 플랫폼적으로 통합된 시스템 형태를 갖도록 설계하였다.

• Transactions of the Korean Society of Mechanical Engineers
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• v.12 no.5
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• pp.1092-1096
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• 1988

This paper presents a research on the development of a system which manages be tool data for the factory using NC machines. The tool information concerning each production stages of the industry is studied in the CIM(Computer Integrated Manufacturing) view point. The system gives the characteristics of the easy and reliable processing of the tool data by the help of menu and graphic functions. The DBMS(Data Base Management System) having relational model is used for the system build-up and is interfaced with CAD system for display of the tool geometry.