• Title/Summary/Keyword: NC(Numerical control)

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Goldstar distributed numerical control system (NC군 관리시스템 (GDDNC))

  • 성재기;홍철기;백운보;김필성
    • 제어로봇시스템학회:학술대회논문집
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    • 1988.10a
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    • pp.268-272
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    • 1988
  • In this paper, we introduce the supermicro computer- based nonreal-time BTR type DNC system, which can provide valuable datas for production and management by monitoring the operation of NC equipments. (upto 48 NC machine) In accordance with manual job schedulinq, part program is combined with tool presetting datas and enables rapid downloading and uploading. An application to the production system of die & Mold plant is presented.

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Study on the Development of Post-Processor for 5-Axis NC Machining (5축 가공용 Post-Processor 개발에 관한 연구)

  • Jo, E.J.;Hwang, J.D.;Jung, Y.G.
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.15 no.3
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    • pp.53-58
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    • 2006
  • This study deals with the method of post-processing in the automatic tool path generation for 5-axis NC machining. The 5-axis NC machining cannot only cope with the manufacturing of complicated shapes, but also offers numerous advantages such as reasonable tool employment, great reduction of set-up process and so on. Thus 5-axis NC machining has been used for aircraft parts, mold and die as well as for complicated shapes such as impeller, propeller and rotor. However, most of the present CAM systems for 5-axis NC machining have limited functions in terms of tool collision, machine limits and post-processing. Especially 5-axis machine configurations are various according to the method which the rotational axes are adapted with the table and spindle. For that reason, In many cases the optimal numerical control (NC) data cannot be obtained or considerable time is consumed. To solve this problem, we applied a general post-processor for 5-axis NC machining. The validity of this post-processor should be experimentally confirmed by successfully milling to a helix shaped workpiece.

Study on the Development of Post-Processor for 5-Axis NC machining (5축가공용 Post-Processor 개발에 관한 연구)

  • Hwang J.D.;Jung Y.G.;Jung J.Y.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.10a
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    • pp.370-374
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    • 2005
  • This study deals with the method of post-processing in the automatic tool path generation for 5-axis NC machining. The 5-axis NC machining cannot only cope with the manufacturing of complicated shapes, but also offers numerous advantages such as reasonable tool employment, great reduction of set-up process and so on. Thus 5-axis NC machining has been used fur aircraft parts, mold and die as well as for complicated shapes such as impeller, propeller and rotor. However, most of the present CAM systems for 5-axis NC machining have limited functions in terms of tool collision, machine limits and post-processing. Especially 5-axis machine configurations are various according to the method which the rotational axes are adapted with the table and spindle. For that reason, in many cases the optimal numerical control (NC) data cannot be obtained or considerable time is consumed. To solve this problem, we applied a general post-processor fur 5-axis NC machining. The validity of this post-processor should be experimentally confirmed by successfully milling to a helix shaped workpiece.

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A Study on the PC-Based Motion Controller Design for Multi-Axis Control (다축 제어용 PC-Based Motion Controller 설계에 관한 연구)

  • 안호균
    • Proceedings of the KIPE Conference
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    • 2000.07a
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    • pp.641-644
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    • 2000
  • Recently As the performance of the personal computer has been improving rapidly lots of research for the pc-based numerical computer actively progress in an easy repair maintenance and improving the performance with less cost. This paper presents the design using complex programmable logic device(CPLD). The CPU of Motion Controller that function as the real time control of the independent multi-axis motion the error-detect module and external I/O control made use of 80C196KC, In this paper The PC-NC effectively distributed to the load of NCK(numerical computer kernel) and have the advantage of high speed and precision.

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-A Study on the DNC System with the Function of Process Monitoring and Control- (공정관리 기능을 강화한 DNC 시스템 구현에 관한 연구)

  • 김채수;심문보
    • Journal of the Korea Safety Management & Science
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    • v.5 no.2
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    • pp.87-98
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    • 2003
  • With the development of CNC(Computer Numerical Control) and communication technology, the connotation and functions of Distributed Numerical Control have been greatly enlarged. In this study, we develop and implement a Distributed Numerical Control system that has real time and multi-tasking operation capability for the machining cell with various NC(Numerical Control) and CNC machines. With the consideration of economy, generalization and extension, this system is interfaced with Shop Floor Control System, Machine Control System and Tool Preparation System using advanced networking method. In the implementation phase, we use the ORACLE DBMS (Database Management System) as the DBMS and Microsoft Visual C++ as the programming tools.

Development of a Ddistributed Numerical Control System (DNC 시스템 개발)

  • Kim, S.H.;S.W.;S.B.;J.H.
    • Journal of the Korean Society for Precision Engineering
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    • v.12 no.12
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    • pp.19-29
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    • 1995
  • The basic technology for a production system represented by design, machining, assembly, and inspection, is machining technology such as CNC machine tools. etc. Direct Numerical Control, that effeciently manages NC programs is developing into Distributed Numerical Control that increases the utilization of the machining cell. It has the ability of monitoring and control, in real time, for CNC and periperial equipment. In this study, we develop a Distributed Numerical Control system that has real time and multitasking operation capability for the machining cell with various CNC's. With the consideration of economy, generalization and extension, the system is interfaced with CNC machine tools and periperial device using RS-485 network and RS-232C communication methods.

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A Study on the Spherical Lens Manufacturing by Simultaneous 3-Axis for NC Lathe (NC 선반에서 동시 3축을 이용한 구면 렌즈 가공 연구)

  • Lee, Min-Ki;Lee, Eung-Suk;An, Dong-Youl
    • Proceedings of the KSME Conference
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    • 2004.11a
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    • pp.956-961
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    • 2004
  • This paper proposes a study on the spherical lens manufacturing by simultaneous 3 axis for NC lathe. We use friction drive system for moving system in experimental diamond turing machine. The diamond turning machine use manufacturing for high quality lens, mirror and many optics products. Especially, the high tech industry require a lot of lens. For example, optical engineering. medical science, space engineering and material engineering etc. The friction drive system is very simple and quiet, compared to ball screw system. We find a problem at the simultaneous 3 axis and suggest a solution. Also, when we manufactured a micro lens. find a problem and solution.

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Development of Optical NC-Scales Fabrication Process (광학식 NC-스케일 제조기술의 개발)

  • 김희식;박준호
    • Korean Journal of Optics and Photonics
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    • v.3 no.4
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    • pp.273-279
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    • 1992
  • Position reading devices such as optical encoders are most essential components in numerical control (NC) machines and robots. Fabrication process of optical NC-scales was developed for domestic production. The whole process using photo-lithographic techniques consists of about 10 steps. The process parameters were to be carefully determined through many trial experiments. The scale marks of metal film was printed on a glass substrate. The optimum values of various process parameters were extrilcted. The quality of scale marks was attributed to the each process parameters.

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A Real-Time Monitoring System Model for Reducing Manufacturing Lead-Time in Numerical Control Process - Focusing on the Marine Engine Block Process - (제조 리드타임 단축을 위한 NC 가공공정에서의 실시간 모니터링 시스템 모형 - 선박용 엔진블록 가공공정을 중심으로 -)

  • Kong, Myung-Dal
    • Journal of the Korea Safety Management & Science
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    • v.20 no.3
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    • pp.11-19
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    • 2018
  • This study suggests a model of production information system that can reduce manufacturing lead time and uniformize quality by using DNC S/W as a part of constructing production information management system in the industrial field of the existing marine engine block manufacturing companies. Under the effect of development of this system, the NC machine interface device can be installed in the control computer to obtain the quality information of the workpiece in real time so that the time to inspect the process quality and verify the product defect information can be reduced by more than 70%. In addition, the reliability of quality information has been improved and the external credibility has been improved. It took 30 minutes for operator to obtain, analyze and manage the quality information when the existing USB memory is used, but the communication between the NC controller computer and the NC controller in real time was completed to analyze the workpiece within 10 seconds.

A unified rough and finish cut algorithm for NC machining of free form pockets with general polygon - Part 1. Simulation (일반적인 내벽을 가진 자유바닥 곡면 파켓의 NC 가공을 위한 단일화된 황삭과 정삭 알고리즘 - Part 1. Simulation)

  • Park, Yong-hoon;Cho, Chi-woon;Kim, Sang-jin
    • 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.

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