A Study on Measuring of Motion Accuracy of NC Machine Tools(No.1) -about Measuring of Linear Cycle Positioning Accuracy of NC Lathe

NC 공작기계의 운동정도 측정에 관한 연구(제1보) - NC 선반의 직선 사이클 위치결정정도 측정에 관하여 -

  • Published : 1998.02.01

Abstract

It is very important to test linear cycle positioning accuracy of NC lathes as it affect all other machines machined by them in industries. For example, if the linear positioning accuracy of x or z-axis directions is bad, the size of works will be wrong and the change-ability will be bad in the assembly of machine parts. In this paper , measuring systems are organized to measure linear displacement of ATC(Automatic tool changer) of NC lathe using laser interferometer, magnescale and tick pulses coming out from computer in order to get data at constant time intervals from the sensors, And each set of data gotten from test is expressed to a plots by computer treatment and the results of linear positioning error motion is estimated to numerics by statistical treatments.

Keywords

References

  1. Test code for performance and accuracy of machining centers JIS B6336
  2. Acceptance code of machine tools, part 1, Geometric accuracy of machines operating under no-load or finishing conditions ISO 230-1
  3. Acceptance code of machine tools. part 2. determination of accuracy and repeatability of positioning of numerically controlled machine tools ISO 230-2
  4. 한국정밀공학회. '94년도 추계학술발표대회 논문집 볼 스크류 전구간 피치오차 측정시스템(Precision Measurement System for Ball Screw Pitch Error) 박희재;김인기
  5. DBB法による NC工作機械の精度評價法 垣野義昭;井原之敏;藻原章翁