For automatic transmissions equipped in cars, planetary gears are essential components. The shift of mainstream automobiles from manual transmission to automatic transmission has put forward a strong demand for improving the production efficiency of planetary gears, especially spiral inner ring gears.
After eight years of arduous research and development, the "automatic transmission spiral puller" that can cut internal gears with high precision in just one sequence from rough machining to precision machining has emerged. The zipper was awarded the National Innovation Fund and was named the first (set) in a key field in 2010.
At present, spiral cutters for processing planetary internal gears of automatic transmissions have been mass-produced.
Technical Features
The automatic transmission spiral puller adopts high-performance materials, with a special coating added to the surface to enhance the cutting performance of the product and extend the service life of the puller;
The zipper adopts a combination structure, and a precision zipper sleeve is installed on the blade body. The blade body can be a circular front angle or a spiral front angle, and the precision zipper sleeve is a spiral front angle with a spiral tooth shape and a tooth profile with tooth lift;
Using internationally advanced equipment for processing and manufacturing, and conducting trial pulling on imported spiral lathes; We use Gleason and Klineberg gear measurement centers to provide comprehensive accuracy testing of parts, ensuring that the precision of the factory cutting tool is qualified.
application
duration
Cutting site
case
The effect of spiral internal gear hobbing process with a modulus of 1.0 or above
Gear parameters: mn1.265 z89 an18.5 °β 20 °
Material of parts: 20CrMo HB170~210
Part length: 15
Accumulated tooth pitch, tooth profile shape, and helix deviation are around the 6th level gear accuracy level;
The accuracy of the tooth profile shape depends entirely on the actual tooth profile of the precision cutting of the die (with strong adaptability to the material and hardness of the parts).
Comparison with international enterprises
From the above table, it can be seen that the spiral puller has fully reached the level of international benchmark enterprises in terms of various technical indicators and usage effects.