How to select materials for gears in gear reducer?

Gear is a kind of mechanical transmission part that must be used in hard tooth surface reducer. Gear transmission transmits the motion and power between any two shafts in space through the meshing of gear teeth, and can change the form and speed of motion. Gear transmission has a wide application range, constant transmission ratio, high efficiency and long service life. In the design and manufacturing process of mechanical parts, it is not only necessary to consider that the performance of materials can adapt to the working conditions of the parts, making the parts durable, but also require that the materials have better processing performance and economy, so as to improve the productivity of parts, reduce costs and reduce consumption. If the gear material is not properly selected, the parts will be damaged prematurely or even fail. Therefore, how to reasonably select and use metal materials is a very important work.

The mechanical properties of materials that meet the mechanical properties of hardened gear reducer include strength, hardness, plasticity and toughness, reflecting the characteristics of materials in use. When the gear is engaged, there is contact stress at the contact of the tooth surface, and there is maximum bending stress at the root of the tooth, which may cause strength failure of the tooth surface or the tooth body. Each point of the tooth surface has relative sliding, which will cause wear. The main failure forms of gears are pitting, gluing, plastic deformation and tooth fracture. Therefore, gear materials are required to have high bending fatigue strength and contact fatigue strength, sufficient hardness and wear resistance of the tooth surface, and certain strength and toughness of the core.

For example, when determining the hardness of large and small gears, it should be noted that the tooth surface hardness of small gears is 30-50HBS higher than that of large gears. This is because small gears are loaded more times than large gears, and the tooth root of small gears is thinner and the strength is lower than that of large gears. In order to make the teeth of the two gears approach equal strength, the tooth surface of the small gear should be harder than that of the big gear.

For more information, please pay attention to Zhengming gear reducer. Hotline: 0512-57970709. Zhengming gear reducer focuses on gear motor, helical gear reducer, hard tooth surface gear reducer and Chengbang gear reducer.