Development of Measurement for Motion Accuracy of 5 Axis NC Machine Tool

Abstract

In recent years， the demand for five − axis colltrol machining centers is getting higher and higher to achieve pr （ ⊃ cess integration and high accuracy ． On the uther hand ， it量 s generany difHcult for five − axis control machining centers to realize the same Inotion accuracy as or higher moti 叩 accuracy than three − axis control ones due to the increase ill tw rotary feed axes in addition to three linear feed axes ． Various five − axis Gon 亡rol madhining centers with suitab 工 e constructiens have been developed for their effective purposes ． At that time ， it has beell considered that Trunniorl type 且ve − axis control mach 正 ning centers canrealize the high motion accuracy relatively easily ， based on actual evaluation data and experience ． To make surc this fact ， a five − axis centrol machining center which has Table on − Table type colユstruction ， different from Trunnion type ， was planned in terms of good Qpe 職 bility ． Its mQtion accuracy was measured and con ユpared with the TTunnion type olle by use of DBB 5 meth ｛｝ d． As a result ， it is confinmed that Table − orTab 】 e type five − axis control machining center has higher motion accuracy than Trunnion type one as well as good operability

Indirect Measurement of Volumetric Accuracy for Three-Axis and Five-Axis Machine Tools: A Review

“…Ushio et al [83,84] presented a serial link mechanism of three orthogonal linear axes for machine tool calibration. Serial links with rotary joints [85][86][87] and parallel link mechanisms [88,89] were also studied for machine tool calibration.…”

Volumetric error measurement and compensation of three-axis machine tools based on laser bidirectional sequential step diagonal measuring method

“…Indirect measurement focuses on the superposed errors of these single errors, which can increase efficiency. Geometric errors of translational axes can be measured indirectly by circular test [11], laser interferometer [12,13], specific artifacts measurement [14,15], passive links [16], tracking interferometer [17,18], etc. In the indirect measurement of geometric errors of translational axes, the laser interferometer is also widely used by designing particular paths, such as the 9-line test, 12-line test [19], 15-line test [19], 22-line test [20], etc.…”