How Are Brake Drums Made?

Overview

• Brake drums are made through a meticulous process involving specific materials and methods.
• Thickness variation and weight are key considerations; manufacturers aim for consistency to avoid scrap costs.

Exhibits

• Brake drums have a non-pitched tone similar to an anvil, varying in weight.
• Manufacturing process involves a computer-based controller and pneumatic drive mechanisms.
• Conventional method uses a steel ring with molten grey iron cast and bonded to the ring, followed by machining.

Manufacturing Process

• Drum ring is fabricated from steel stock and machined to precise dimensions.
• After machining, the drum back is positioned and tack-welded to the ring.
• Process repeated until desired diameter is achieved.
• Importance of maintaining specific distances in small factories to ensure quality and minimize porosity.

Sensors

• Electromechanical drum brakes have potential in electromobility and automated driving.
• Integrated brake torque sensors explored for preventing variations in torque and friction.
• Brake sensors increase safety but require replacement alongside brake pads.

Materials

• Common materials: steel, cast iron, aluminum, ceramics.
• Composite materials used to enhance friction properties and safety.
• Backplate absorbs torque and must be strong and wear-resistant.

Location of Manufacture

• Annular steel drum jacket and central back are key components.
• Balance and weight distribution important for performance.
• Six parts: adjuster mechanism, brake shoes, emergency braking mechanism.

Santa Brake

• Chinese manufacturer with over 15 years of experience.
• Exports to more than 20 countries with over 50 satisfied customers.

Conclusion

• Brake drums are crucial for vehicle safety and performance.
• Attention to material, manufacturing process, and installation ensures effective braking.