Powder Metallurgy Double Gear
Powder metallurgy double gears are composite parts with two gear structures manufactured through powder metallurgy technology. They are widely used in fields such as automobiles, home appliances, and office equipment, and have advantages such as high precision, high strength, and low cost.
- Product Introduction
product Details
|
Commodity |
Factory customized high precision strong wear resistance powder metallurgy double gear |
| Accuracy | ±0.02mm |
| Density | 6.7-7.4g/cm³ |
| Hardness | HRC30-40 (after heat treatment ) |
| Sintering Temperature | 1050-2000℃ |
| MOQ | 2000 PCS |
Performance Advantage
| Advantage | Instructions |
| High material utilization rate | Near net forming technology results in minimal material waste (traditional cutting processes have a material utilization rate of about 40%, while powder metallurgy can reach over 95%). |
| Integration of complex structures | Complex parts such as double gears, wheel hubs, or keyways can be formed in one go, reducing assembly processes. |
| Controllable performance | By adjusting the powder composition and sintering process, high strength (tensile strength up to 800-1200MPa), wear resistance and other characteristics can be achieved. |
| Cost-effectiveness | Suitable for large-scale production, reducing mold sharing costs and eliminating some machining steps. |
Typical application areas
1.Automotive industry: used for transmissions, engine timing systems, seat adjustment mechanisms, etc., such as synchronizer gears and oil pump gears.
2.In the field of household appliances: washing machine clutches, air conditioning compressor gear components.
3.Office equipment: transmission gears for printers and copiers.
4.Electric tools: reducer gear set, requiring high torque and wear resistance.
Producing
Manufacturing process of powder metallurgy double gears
1. Powder preparation: Select iron-based, copper based and other alloy powders, and produce them through atomization or reduction methods to ensure uniform powder particle size and composition.
2. Mixing and Forming: After mixing the powder with lubricants and binders, the green body of the double gear is pressed by cold isostatic pressing or compression molding in the mold.
3. Sintering: The green body is sintered at high temperatures (usually 1100-1300 ℃) in a protective atmosphere (such as nitrogen or hydrogen) to combine the powder particles and form a dense metal structure.
4. Subsequent processing: Precision machining, heat treatment (such as carburizing and quenching), machining (such as tooth surface grinding) or surface treatment are carried out according to the requirements to improve accuracy and performance.
Design considerations
1. Structural feasibility: Avoid deep cavities, thin walls, or sharp corners to ensure even powder filling. For example, it is recommended that the gear module be ≥ 1 and the tooth width not exceed one-third of the diameter.
2. Density uniformity: Different parts of the double gear (such as teeth and hub) need to be designed with reasonable pressing density to prevent sintering deformation.
3. Accuracy control: The size shrinkage rate after sintering is about 1-3%, and compensation should be reserved in the mold design. Key dimensions can achieve IT7-IT8 level accuracy through subsequent finishing.
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