Advantages and disadvantages of machined gear and powder metallurgy gear

Advantages and disadvantages of machined gear and powder metallurgy gear

How much do you know about the advantages and disadvantages of machined gear and powder metallurgy gear? Many people may not know the specific advantages and disadvantages of machined gears and powder metallurgy gears. Today, Qinhuangdao zhongwei Precision will tell you in detail:

1、 Advantages of powder metallurgy gear:

1. Low cost, high production efficiency, one-time molding, no need to process gear teeth after molding.

2. Due to the processing characteristics of powder metallurgy, as an oil containing part, it can be non lubricated, but the effect is still slightly worse than that of oil bath lubrication, and it is in the boundary lubrication state.

3. There is no waste in the gear forming process, and the steel resources are better utilized.

powder metallurgy

2、 Disadvantages of powder metallurgy gears:

1. Powder metallurgy is a process to recrystallize metal powder at high temperature without rolling process, forming metal fiber flow, and having non oriented mechanical properties. Therefore, the shear strength of gear teeth is worse than that of machined gears in the past.

2. Because of 1, the contact strength of P/M gear teeth is also low, so it cannot transmit large torque.

3. Although it can be made into gears with oil, the validity period of oil lubrication is short. In order to ensure normal use, oil bath lubrication is the best way to add lubrication.

4. Powder metallurgy gear has low accuracy. In the process of high-temperature sintering and forming, it is impossible to control what kind of bricks are fired like bricks, and its correct size cannot be controlled, so the stability of transmission is poor.

As mentioned above, in some unimportant mechanisms, powder metallurgy gears such as toys, precision transmission, large torque transmission and other gears that are still preferentially machined can be considered. The precision of gears manufactured by powder metallurgy is not very high, but it is generally about 10 wires, which is not suitable for precision transmission. Now you know what the advantages and disadvantages of machined gear and powder metallurgy gear are! Friends in need can consult zhongwei precision.