Development Status of High Precision Spiral Bevel Gears

The geometric characteristics of the tooth surface of the high-precision spiral bevel gear are complex, and the manufacturability is strong. From the perspective of mathematical theory, even if the modulus, pressure angle, helix angle and contact area of ​​the tooth surface of the bevel gear are known, the gear of the bevel gear cannot be completely determined. The bevel gear tooth surface has countless meshing conditions in a certain space, so the processing parameters are more complicated. It can be seen that the geometric calculation parameters of the spiral bevel gear and the additional bed structure are very complicated and cumbersome. And tooth surface generation technology, detection technology, correction technology, etc. These are generated accordingly, well behind normal gear.

There are two ways to handle gear teeth. One is the double-sided method for processing large gears, and the single-sided method for processing small gears. The other is large, and the pinion is processed by the single-sided method. When using the former method, the radius of the cutter head on both sides of the large gear tooth is different, and the helix angle at the center point is also different, so the bottom groove of the large gear will cause the cutter head of the small gear bottom groove to have a too small misalignment distance, which will affect the strength and life. The latter method will not produce the above situation when processing gears, but the processing efficiency is relatively low. Correct meshing can only be ensured through various gear correction calculations. Only when the axis of the cutter head is perpendicular to the root cone of the machined gear can the root surface be developed correctly. Therefore, the tooth profile angle of the gear is modified to be symmetrical to the pitch line, but this also results in an increase in head gauge and number.

As a key transmission component in the automotive, petroleum, energy and aerospace industries, its theory, design, processing technology and innovation capabilities are important symbols of the development level of the country's manufacturing industry. At present, the spiral bevel gear industry has begun to combine high-precision spiral bevel gear technology with computer technology and intelligent manufacturing technology. New and more mature theoretical designs, processing heat treatment technologies and new materials are constantly emerging, and the quality of spiral bevel gears is constantly improving. my country's research on spiral bevel gears is relatively late, so it is more necessary to improve domestic spiral bevel gear technology through continuous innovation to meet future challenges.