With the rapid development of the automotive transmission industry, the demands for gears, which are core components, are increasing. Requirements such as lightweight, low cost, low energy consumption, and new materials have become new challenges in its development.
This article discusses the application of powder metallurgy helical gears in automotive transmissions, elaborating on their advantages, disadvantages, and application limitations from the perspectives of design, process, and validation of powder metallurgy gears.
As the automotive transmission industry develops rapidly, the demands for gears as core components are also increasing. Requirements for lightweight, low cost, low energy consumption, and new materials have become new challenges in its development. A decision was made to attempt producing involute helical gears using powder metallurgy technology.In powder metallurgy technology, there is a potential opportunity to reduce gear weight by 8% to 20%, which can also lower the inertia of synchronizing mechanisms within transmissions such as MT, AMT, and DCT. Meanwhile, the product process chain will be shortened, and there will be savings in terms of factory area, equipment investment, and energy consumption compared to traditional steel gear machining processes.
This technology may bring significant changes to future gear manufacturing.Advantages of powder metallurgy gear technology:
1) Overall material utilization can reach over 95%;
2) No or very little cutting processing is needed;
3) Part dimensions are stable, consistency is good, and precision is high;
4) Production efficiency is high, suitable for mass production, and the required cost is lower than cutting machining.
