三坐标测量机测量圆弧的误差分析

房兵红
中国电子科技集团公司第四十一研究所,青岛266555
摘　要:本文针对日益提高的现代制造精度，以测量圆弧为例，分别从4个方面分析了三坐标机测量圆弧过程中产生误差的原因：以椭圆弧测量代替圆弧测量引起的测量误差、零件本身制造引起的测量误差、测头半径未被修正引起的测量误差、小圆心角圆弧的敏感系数引起的测量误差，并提出了相应的解决方法，从而较大幅度地减小了测量误差，使测量值更接近真值。[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