標(biāo)準(zhǔn)號：BS 6740-1987
中文標(biāo)準(zhǔn)名稱：通過測量半徑變化測定不圓度偏差的方法
英文標(biāo)準(zhǔn)名稱：Method for determining departures from roundness by measuring variations in radius
標(biāo)準(zhǔn)類型：J04
發(fā)布日期：1987/2/27 12:00:00
實施日期：1987/2/27 12:00:00
中國標(biāo)準(zhǔn)分類號：J04
國際標(biāo)準(zhǔn)分類號：17.040.30
適用范圍：This International Standard specifies a method for determining departures from roundness by measuring variations in radius by means of contact (stylus) instruments.It establishes a) types of instruments and general requirements;b) recommendations for the use of instruments;c) procedures for calibration of instruments and verification of their characteristics.This International Standard applies to the assessment of the departures from ideal roundness of a workpiece through the medium of a profile transformation, obtained under reference conditions, expressed with respect to any one of the following centres:a) centre of the least squares circle;b) centre of the minimum zone circle; c) centre of the minimum zone circumscribed circle;d) centre of the maximun inscribed circle.Each of these centres may have its own particular application. The position of the least squares centre can be calculated from a simple explicit equation given in annex F.Departures from roundness of the measured profile, procedure, calibration and determination of systematic errors of rotation are dealt with in annexes A to D, respectively. Annex E gives rules for plotting and reading polar graphs.