• 제목/요약/키워드: NC 선반

검색결과 57건 처리시간 0.018초

볼나사 열변형에 따른 반복정밀도 개선에 관한 연구 (A Study on Improvement of Repeatability induced Thermal deformation of the ball screw)

  • 조규재
    • 한국공작기계학회:학술대회논문집
    • /
    • 한국공작기계학회 1997년도 추계학술대회 논문집
    • /
    • pp.31-36
    • /
    • 1997
  • Thermal expansion of the ball screw in semi-closed loop type CNC Lathe directly affects the position precision along the travel axis. In this paper, the thermal displacement of the ball screw is estimated by using macro variables. The estimated displacements of the ball screw are managed by calculating the interval of pitch error rate in the NC. The thermal behaviour of the ball screw of the CNC Lathe, under the constant operating conditions, was measured to examine the effectiveness of this compensation method. The results showed that thermal displacement of the ball screw could be maintained its accuracy better than 6${\mu}{\textrm}{m}$ while applying this method.

  • PDF

CNC 선반가공 및 자동 측정시스템 개발에 관한 연구 (A Study on the Development of Machining and Measuring System for CNC Lathe)

  • 김정순;구영회
    • 한국산업융합학회 논문집
    • /
    • 제3권1호
    • /
    • pp.83-90
    • /
    • 2000
  • The purpose of this study is the development of CAM system which can machine and measure any shape by CNC lathe. The overall goal of the CAM system is to achieve the CNC lathe machining, from roughing through to final measuring, The hardware of the system comprises PC, CNC lathe and measuring tools. There are three steps in the CNC lathe machining and measuring, (1) geometric modeling by the shape patterns, (2) NC commands generation by the tool path compensated for tool nose radius, (3) machining and workpiece measuring on the lathe. It is developed a software package, with which we can conduct a micro CAM system in the PC without economical burden.

  • PDF

Windows CE 기반의 CNC 선반 개발에 관한 연구 (Development Opened CNC Software Based on MS Winsows CE)

  • 임태완;이철수
    • 한국공작기계학회:학술대회논문집
    • /
    • 한국공작기계학회 2003년도 춘계학술대회 논문집
    • /
    • pp.448-453
    • /
    • 2003
  • This paper researched about technique of Opened CNC that were able to adapt themselves to rapid development of software and hardware. It is basic research what develop a scheme whereby technic make property. This paper theorized about to realize Opened CNC Software which is developing CNC Software flow from building Windows CE operating system's image that is possible realtime acting and multitasking. And Opened CNC Software's component designed independent classified modules. Classify Opened CNC Software's component which was consisted of basic OS Kernel, NC Code parser, Servo Motor Control, Software PLC, MMI(Man-Machine Interftce). And show there's functional example

  • PDF

선반 가공자동화를 위한 공구관리 시스템의 개발 (Development of a Tool Management System for Turning Machine)

  • 김철한;김은엽;김광수;김선호;이춘식
    • 산업공학
    • /
    • 제3권2호
    • /
    • pp.13-22
    • /
    • 1990
  • The efficient and economical use of an FMS presupposes a good capability : flexibility, reliability, maintainability and built-in quality assurance. One subsystem of an FMS, which often increases capability, is the tooling management. The main problems associated with tooling in an FMS are large variety of tools, many setups, insufficient use of presetted tools, tool condition control, tool shortages, errors in tooling data and maintainence. This paper presents a reseach on the development of a system which manages the tool data for the factory using NC turning machines. The tool information concerning each production stages of the industry is studied in the CIM(Computer Integrated Manufacturing) view point.

  • PDF

CNC 선반의 열적 거동 해석 (Thermal Behavior Analysis of a CNC Lathe)

  • 안경기;조동우
    • 한국정밀공학회:학술대회논문집
    • /
    • 한국정밀공학회 1994년도 추계학술대회 논문집
    • /
    • pp.778-783
    • /
    • 1994
  • In operating automated manufacturing system, the long term stability and reliability of NC machine tools become most critical issues. Especially the machining accuracy is dominated by the thermal deformation of machine tools which remains still unsolved and causes troubles in manufacturing operations. Although researches have been carried out on the thermal behavior of a machine tools to minimize or control the thermal deformation of machine tools, the computer models for an analysis of the thermal behacior in machine tools has yet to appear in the open literature. The object of the paper is to present a method of modeling the thermal behavior of a machine tool. The method will make use of finite elements ad be capable of modeling whole machine structures as well as of heat generation processes in the kinematic system components. And temperature distributions and thermal deformations of a CNC lathe are analyzed using the finite element method and are compared with those measured in practice.

  • PDF

선반작업(旋盤作業)에서의 FFT Analyzer에 의한 표면(表面)거칠기 해석(解析) (Analysis of Surface Roughness by FFT Analyzer in Turning Operation)

  • 김경연;최은순
    • 비파괴검사학회지
    • /
    • 제12권3호
    • /
    • pp.12-19
    • /
    • 1992
  • This paper shows that the identified and unidentified components of surface roughness in NC turning lathe which can not be analyzed in time domain such as $R_{max},\;R_a$ can be isolated in frequency domain by FFT analyzer. By interfacing FFT analyzer with stylus surface roughness instrument, surface roughness on change of working condition, especially tool feed, such as 0.1, 0.15, 0.2, 0.25, 0.3(mm/rev) can be analyzed in frequency domain as follows. 1. By frequency analysis of surface roughness profile, the basic wave length of surface roughness can be obtained to isolate the identified and unidentified components of surface roughness. 2. With increase of tool feed, the unidentified components of surface roughness increase. 3. Since $R_{max}$, which can be obtained by stylus surface roughness is proportion to the output voltage of FFT analyzer, FFT analyzer also can be used to measure surface roughness in time domain such $R_a,\;R_{max}$.

  • PDF

국도 4차로 곡선부에서 주행속도의 특성 및 모형 (Characteristics and Modeling of Operating Speed at Horizontal Curves on Rural Four-Lane Highways)

  • 고종대;장명순;정준화
    • 대한교통학회지
    • /
    • 제20권7호
    • /
    • pp.95-105
    • /
    • 2002
  • 특정 설계속도 기준에 따라 도로의 선형 조건이 주어졌을 때, 설계자가 기대했던 것만큼의 속도로 운전자가 차량을 주행하는지는 도로의 안전성을 좌우하는 기본 틀을 형성한다. 본 연구는 국도 4차로 평면 단곡선부의 1차로를 공간적 범위로 설정하고, 진입부 직선도로∼곡선부도로∼진출부 직선도로로 구분하여 선행차량에 의해 영향을 받지 않는 승용차의 주행속도를 NC-97장비를 이용하여 조사하였다. 다양한 곡선부 기하조건 하에서 직선부 85백분위 주행속도(Vt)와 곡선부 85백분위 주행속도 (Vc) 특성을 분석한 결과, 곡선부에서 평균 S3∼65%정도의 많은 운전자들이 제한속도(80kph) 보다 평균14∼20kph 정도 높게 주행하고, 곡선부 85백분위 주행속도가 낮은 지점은 곡선반경이 작을 때는 곡선부 중앙(2L/4)이었으나 곡 선반경이 커지면 곡선부 L/4지점으로 이동(단, L=곡선장)하고, 곡선반경에 따른 직선부·곡선부 85백분위 주행속도 차이는 곡선반경이 작을수록 커지고 곡선반경이 클수록 작아진다는 연구 결과가 도출되었다. 또, 현장조사결과와 개발한 모형을 통하여 곡선부 주행속도에 영향을 미치는 중요한 인자로는 곡선반경과 직선부 85백분위 주행속도라는 연구결과가 도출되었다.