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What is the production process of truck brake drums, and what about their product performance?
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Update time : 2025-06-17 11:00:00
As a core component of the truck's service braking system, the brake drum decelerates and stops the vehicle by converting its kinetic energy into heat. Its quality is crucial for driving safety. Understanding its production process and performance advantages helps in grasping the product's reliability.
Production Process
- Raw Material Preparation: Gray cast iron or ductile iron is selected. Elements such as carbon and silicon are strictly tested for their content, and then the materials are melted in proportion.
- Casting Molding: Sand casting (low cost, suitable for complex shapes) and metal mold casting (high efficiency, suitable for mass production) are commonly used. The pouring temperature and speed are strictly controlled.
- Machining: Rough machining removes excess material. Finish machining grinds the friction surface to Ra0.8 - Ra1.6μm, and the mounting holes are processed to ensure assembly accuracy.
- Heat Treatment: Annealing relieves internal stress, while quenching and tempering increase the hardness to HB200 - HB280, enhancing wear resistance.
- Quality Inspection and Surface Treatment: After passing inspections of dimensions, hardness, and flaw detection, anti-rust paint is applied or electrophoretic coating is performed to prevent corrosion.
Performance Advantages
- High Durability: Special materials and processes extend the wear life by 30% - 50%, reducing maintenance costs.
- Good Thermal Stability: Maintains stable performance at high temperatures, preventing brake failure due to thermal deformation.
- Reliable Braking: The precisely machined friction surface fits closely, providing a stable braking torque and shortening the braking distance.
- Wide Adaptability: Compatible with different vehicle models, facilitating maintenance, replacement, and reducing production and inventory costs.
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