三坐標測量機測量圓弧的誤差分析

房兵紅
中國電子科技集團公司第四十一研究所,青島266555
摘　要:本文針對日益提高的現代制造精度，以測量圓弧為例，分別從4個方面分析了三坐標機測量圓弧過程中產生誤差的原因：以橢圓弧測量代替圓弧測量引起的測量誤差、零件本身制造引起的測量誤差、測頭半徑未被修正引起的測量誤差、小圓心角圓弧的敏感系數引起的測量誤差，并提出了相應的解決方法，從而較大幅度地減小了測量誤差，使測量值更接近真值。[著者文摘]

Error analysis of arc measure by CMMFang Binghong The 41^st Research Institute, CETC, Qingdao 266555Abstract:This paper analyzed the courses of measuring error in arc measurement by CMM（Coordinate Measuring Machine） from four aspects for the increasingly improved desire of manufacturing accuracy. The courses were arc measurement been instead of elliptic arc measurement, part＇s manufacturing errors,the non-corrected gauge probe radius and the sensitivity coefficient of the arc of small central angle. The corresponding solving methods were proposed for the courses. Thus these methods greatly decreased the measurement error, made measurement value more close to true value.[著者文摘]

Key words:normal vector; sensitivity coefficient; the arc of small central angle