抄録
Polygonal profiles used for couplings must be precise in shape. Therefore, the following conditions must be satisfied in the measurement of this kind of profile : a. The rotation angle must be precise in the range 0°∼360° ; b. The radius must be equally correct ; c. The same degree of precision is desirable for the measurement of the shaft and the boss. Taking into consideration of the above conditions, the author adopted the feeler method apparatus on the toolmakers' microscope. In this measurement, the roundness of the measuring edge has an effect upon the accuracy of the profile measurent. In this report, the author studied the theoretical values of error in reading of the lathe-turned profile and the ground profile. And based on the correction formula, the correction chart of profile measurement was prepared for the practical use. According to this chart, the results of the close examination for the experimental polygonal shafts were indicated.
