Based on the above measurement principle, the milling involute enveloping hourglass worm sample shown in Figure 1 is tested in the klingelberg P26 gear measurement center, as shown in Figure 2. Take the distance angle between measurements θ C is 60 °， The measured data are imported into the 3D software, and the data are fitted according to the fifth order spline curve. The comparison between the measured tooth profile curve and the theoretical 3D model is shown in Figure 3.
According to the process, the measured data are processed to get the maximum deviation of the left and right tooth surfaces Δ Fmax and mean deviation Δ f∑。 The maximum deviation of left tooth surface of hourglass worm is 24.7% μ m. The average deviation is 12 μ m; The maximum deviation of right tooth surface of hourglass worm is 17.2 μ m. The average deviation is 9.3% μ m; The accuracy of the right flank of worm is higher than that of the left flank.
In dmu60 mono block 5-axis vertical machining center, the tooth surface of variable tooth thickness involute gear enveloping hourglass worm was milled, and the tooth surface was detected in klingelberg P26 gear measuring center
(1) the method of detecting the tooth surface error of hourglass worm based on topological graph is proposed, and the method of detecting and processing the tooth surface error of hourglass worm based on gear measuring center is analyzed.
(2) the tooth surface error of the milling hourglass worm sample is detected, and the maximum deviation of the left tooth surface of the worm is 24.7% μ m. The average deviation is 12 μ m; The maximum deviation of right tooth surface of hourglass worm is 17.2 μ m. The average deviation is 9.3% μ m; The accuracy of the right flank of worm is higher than that of the left flank.