Fabrication process
First, the metal powder (such as iron-based, copper-based and other alloy powder) is mixed with an appropriate amount of additives (such as lubricant, binder, etc.) evenly, and then put into the mold. Under a certain pressure, the powder is pressed into the desired shape of the body, which is called pressing.
Then the green body is put into a high temperature furnace for sintering. Under the action of high temperature, the diffusion and recrystallization processes occur between the powder particles, so that the particles are connected with each other and form a gear with certain strength and density.
In order to further improve the performance and precision of gears, it is also possible to carry out subsequent processing on sintered gears, such as finishing, oil immersion, surface treatment, etc.
Characteristic
High precision:
Can manufacture gears with high dimensional accuracy and good tooth shape accuracy, which can meet the requirements of various precision transmission.
Complex shape:
· Complex gears can be manufactured, such as gears with spokes, spline and other structures, reducing subsequent processing procedures.
· High material utilization rate: compared with traditional cutting processing methods, powder metallurgy process has almost no cutting waste, and the material utilization rate can reach more than 90%.
-Good self-lubrication: by adjusting the powder formula and porosity, the gear can have good self-lubrication performance, reduce the friction coefficient, reduce wear, improve service life.
· High cost-effectiveness: For mass production of gears, powder metallurgy process can reduce production costs and improve production efficiency.
Application area:
Automobile industry: various gears used in automobile engine, transmission, transfer case and other components, such as timing gear, synchronizer gear and so on.
• Home appliance industry: widely used in the motor and transmission system of air conditioning, refrigerator, washing machine and other home appliances.
• Electric tool: it is the key part of the gearbox in electric tools, which can withstand large torque and impact force to ensure the efficient operation of the tool.
• Office equipment: such as copiers, printers and other equipment transmission gears, require high precision, low noise, powder metallurgy gears can well meet these requirements.
