Processing principle of high precision spiral bevel gear

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

The processing principle of high-precision spiral bevel gear: the simulation wheel is the processed gear, and the unified chuck is the tooth of the profiling wheel. When the simulated wheel incorporates this breaking element, the cutter head cuts through the gear teeth. How to process the big wheel and the small wheel, and calculating the correct value after processing is the main problem that needs to be solved. Many experts and scholars at home and abroad have done a lot of research and published many papers and professional works, especially for spiral bevel gears and reduced tooth hypoid gears. Since the large and small wheels are processed into flat-top production wheels, their orientation and curvature need to be calculated, and the contact analysis is very complicated, and it is difficult to obtain ideal results when applied to reality. With the popularization of controllable gear machine tools and grinding technology, the processing methods of gear systems in my country have developed rapidly. All use cycloid contour teeth, the calculation is simple, and the contact area is better than shrinkage. The research results show that in the processing of small batch products, especially in the processing of high-precision spiral bevel gears, the use of circular arc contour teeth is an ideal choice.

The machining of high-precision spiral bevel gears is completely universal in theory, so in theory, there is no need for a computer to send the direction and curvature of the vector. Gears are also called arc wheels. When viewed from the side, it has a flat gear shape. The principle of its development is to polish the high teeth on the basis of the swing arc. In the process of processing, the factory usually cuts a small amount of gears according to the plane of the gears in the production method, and takes the "contact area" of each part as the starting point to combine the cutting machine with the shaft to realize the processing of the shrinking gears.