Spiral Bevel Gear Tooth Surface Coordinate Measuring Machine To Measure The Key Technologies And Measurement Data Applications

Spiral bevel gear is important transmission fundamental component applied in modern gearing. As the marked development of manufacture technology, the acquire for high-precision of the spiral bevel gear is increasing accuracy. With the need of the ability of the high-load bearing, the performance which contains smooth-transmission, low-noise and low-vibration and so forth should be satisfied. So the tooth surface measurement technology playing an increasingly important role in the processing of gears. Nowadays, the measurement have evolved from the traditional contact precision control to the real tooth surface geometrical precision control used on the coordinate measuring machine, to implement digitization technology based on tooth surface geometrical control technology. Presently, the geometric information of the spiral bevel gear is usually measured by the specialized gear measuring center internationally. As the measuring center is high-price and the measurement technique is kept secret, wich prevent the advancement of the digital manufacturing of our national gear industry. Therefore, it is very important to control the geometric precision of tooth for and improving the quality of the gear that research the technology of gear tooth measurement on the coordinate measuring machine which is the universal dimensional measuring equipment. Then, the measurement result will be used to analyze the information of tooth contacting and correct the machine-settings, which would put forth in this paper has theoretical consequences and better applicable value in engineering.1. According to the manufacturing theory of spiral bevel gear, the mathematic model of tooth surface is established. And the solid model is build after the spots of tooth surface accounted by MATALB. They are the theoretical foundation for the surface measurement, the analyze of the real tooth contact and the correction the machine-settings.2. Researched the measurement of spiral bevel gear in the coordinate measuring machine. The measuring grid is programmed on the theoretical tooth surface which is projected vortically. The coordinate value of the measuring grid and the unit normal vector coordinates are calculated and imported in the coordinate measuring machine. The contents including the component and the function of the coordinate measuring machine, the conversion between the gear coordinate system and the measurement coordinate system, the tooth rotational position and concrete step of measuring are studied in detail. The measuring experiment is performed. And it is found that the normal errors between the theoretical date and real-test date are calculated in the errors map. Those dates are the reliable basis of fitting the real tooth surface and correcting the machine-settings.3. Discussed the technology of fitting real tooth surface based on the real-test dates and the finite element analysis. The mathematic model of the real surface is built, and the contact analyze of real gears is complete by the finite element software.4. The Sequential Quadratic Programming method is advanced to solve the over determined set of the machine tool regulation parameter and the normal error of the tooth. Some instances of real tooth surface measurement and machine-settings correction calculation are experimented on the coordinate measuring machine...