三次元座標測定機によるスクリュー圧縮機ロータの測定

概要

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A method for measuring a screw-compressor rotor using a coordinate measuring machine(CMM)is proposed. The profile of the rotor is constituted by a number of profile curves that are smoothly connected with each other. The position of each connecting point can be expressed with its radius in cylindrical coordinates. Such a rotor tooth surface is measured with a CMM. During the measurement, the current curves should be identified and distinguished from the rest. To do this, we compare the radius with the distance between the measured point and the Z-axis in cylindrical coordinates. The essence of the method is as follows. First, the coordinates of a number of points on the surface are measured. Second, the probable rotor surface is estimated by the method of least squares, and the errors are determined. This paper explains in some detail methods for measurement of eccentricity, of errors due to the division of the tooth space, of profile errors, and of lead errors.
社団法人日本機械学会の論文
2000-05-25