Making gears commonly used material
Making gears commonly used steel has the tempering steel, hardened steel, carburizing harden steel and seepage nitrogen steel. The strength of the cast steel than forging steel is a bit low, often used for large size of gear; The mechanical properties of the gray cast iron is bad, and can be used in the light load open gear transmission; Nodular cast iron can be partially instead of steel manufacturing gear; Used for plastic gears light load and requirements of low noise place, and the pairing of gear generally with the thermal conductivity good steel gear.
The future is overloaded, high speed, gear high accuracy and efficiency and the development direction, and makes every effort to small size, light weight, long service life and economic and reliable.
And gear theory and the development of the manufacturing process will be further research gear mechanism of injury, this is to establish a reliable strength calculation method basis, is improve the capacity and prolong the service life of the gear theoretical foundation; Development with circular arc tooth profile, as a representative of the new tooth shape; The new type of gear materials and manufacturing new process of gear; Study of the gear elastic deformation, manufacturing and installation error, and the temperature field distribution, the gear tooth shape, in order to improve the functioning of the gear stability, and with the increase in gear contact area, so as to improve the bearing capacity of the gear.
Friction and lubrication theory and lubrication technology is the basic work gear research, the elastohyddrodynamic lubrication theory, the synthetic lubricants and promotion in oil properly join extreme pressure additives, not only can improve the bearing capacity of the teeth, but also can improve the transmission efficiency.
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