Taking a hypoid gear as an example, the geometric parameters of the hypoid gear and the setting parameters of the processing machine tool complete the processing of the hypoid gear according to the setting parameters of the relevant processing machine tool. The hypoid gear processed according to the parameters is installed on the rear axle testing machine for loading test. The input speed of the small wheel is 4000 R / min and the input torque is 160 n M, 2000 km and 5000 km respectively. During the test, in order to better reflect the tooth surface wear of the hypoid gear, some grinding powder was added to the lubricating oil to artificially wear the tooth surface of the hypoid gear, and the tooth surface wear results of the hypoid gear were obtained, as shown in Figure 1 (in the test, 150 mg grinding powder was added to 1.3 l lubricating oil of the tested hypoid gear).
Hyb-35 hypoid gear tooth surface measuring instrument is used for scanning measurement, and the measurement process is shown in Figure 2. The tooth surface of hypoid gear is constructed based on the proposed interpolation algorithm, and the results are shown in Fig. 3; The research method constructs the tooth surface of hypoid gear, and the results are shown in Fig. 4. By comparing the test results with the digitally constructed hypoid gear tooth surface, the proposed method has higher accuracy in terms of the maximum tooth surface error in the wear area of hypoid gear tooth surface. It can be seen that the proposed digital tooth surface construction method of hypoid gear based on non feature block interpolation technology has high accuracy.
Based on the data points on the real tooth surface Σ r of hypoid gear, the digital hypoid gear tooth surface model constructed by area weight interpolation method and through method is compared with the data points on the real tooth surface Σ R. In the error analysis of digital hypoid gear tooth surface model, according to the research content, focus on aligning the data measurement points of hyperbolic gear tooth surface wear area for data verification. According to the wear test results of hypoid gear tooth surface, the data verification area is determined, as shown in Figure 5.
It can be seen from the data that in the wear measurement area of hypoid gear tooth surface, the accuracy of verification points on the tooth surface of hypoid gear digitally constructed based on area weight interpolation method is less than 20 μ m. The accuracy of the digital hypoid gear tooth surface verification point constructed by the non characteristic block interpolation method proposed in this paper is less than 3.6 μ m。 It can be seen that the method proposed in this paper improves the tooth surface construction accuracy of real hypoid gear in wear area.
