Sinbo Precision Joint Module Heat Dissipation Shell Machining Case Study

In robotic joint modules, the machining quality of the heat dissipation shell directly affects the thermal management efficiency and long-term operational stability of the entire system. Sinbo Precision's joint module heat dissipation shell successfully addresses the heat dissipation challenges in high-power density joint modules through multiple innovative processing technologies.

The heat dissipation shell utilizes aluminum alloy materials (such as AL6061/T6 or AL7075/T6), achieving excellent thermal conductivity and structural stability through precision CNC machining and thermal management technology optimization.

The core machining challenge Sinbo Precision faced was how to achieve optimal thermal performance while ensuring the precision of complex structures. The joint module heat dissipation shell needed to meet the following technical specifications:

• Extremely high dimensional accuracy requirements: Thin-walled structure thickness tolerance must be controlled within ±0.05mm, flatness error not exceeding 0.1mm/m, and surface roughness reaching Ra0.8 or better.
• Complex internal structures: The heat dissipation shell includes complex features such as special-shaped flow channels, fin arrays, and interface slots, making machining extremely difficult.
• Thermal management performance: Ensuring complete contact between the heat dissipation shell and the joint motor surface, with thermal conductivity efficiency required to exceed 400W/(m·K).
• Material stability: Aluminum alloy is prone to deformation and stress during processing, requiring special process control measures.

Sinbo Precision adopted a series of innovative machining processes to address these technical challenges:

• Multi-axis CNC precision machining: Using 5-axis simultaneous CNC centers, generating optimal tool paths through precision programming and simulation to ensure one-time forming of complex geometric shapes. Adopting a two-stage strategy of "rough machining + finish machining," where rough machining quickly removes excess material, and finish machining refines surface roughness and dimensional accuracy.
• Elastic clamping and positioning technology: Addressing the easy deformation of thin-walled parts with precision three-jaw chucks and elastic clamping devices to reduce workpiece deformation during clamping. The specially designed fixture system controls deformation within 0.05mm.
• Preheated cutting technology: Applying electric heating or plasma arc preheating to machining areas, softening the cutting area to reduce its hardness and shear strength, thereby improving cutting performance and reducing cutting force and power consumption.

Sinbo Precision integrated multiple advanced thermal management technologies into the heat dissipation shell design:

• Phase change material application: Setting phase change heat absorption film between the joint motor and the shell to effectively absorb and disperse heat generated during operation.
• High thermal conductivity materials: Attaching thermal conductive film with thermal conductivity exceeding 400W/(m·K) to the robotic arm contact surface, significantly improving thermal conduction efficiency.
• Composite geometric structure design: The inner surface of the container cavity is equipped with several outward protruding composite geometric bodies, effectively increasing the heat exchange area and providing more contact surface for heat absorption and dissipation.
• Heat dissipation fin optimization: Adopting parallel arranged heat dissipation fin design, with precisely calculated spacing and thickness to maximize heat dissipation surface area and airflow efficiency.

Surface treatment processes are crucial to the performance and lifespan of the heat dissipation shell:

• Anodizing treatment: Forming an oxide film on the aluminum alloy surface to improve heat resistance, wear resistance, and enhance corrosion resistance.
• Nickel plating technology: Using selective nickel plating process on contact surfaces to further reduce contact thermal resistance and improve thermal conduction efficiency.
• Precision polishing process: Performing mirror polishing on contact surfaces to ensure perfect fit with chips and other heat dissipation components, reducing thermal resistance.

Sinbo Precision established a complete quality inspection system including three-coordinate measurement, thermal performance testing, and pressure testing to ensure each heat dissipation shell meets strict quality standards.

After a series of process optimizations, Sinbo Precision's joint module heat dissipation shell achieved significant performance improvements:

• Dimensional accuracy indicators: Product thickness tolerance controlled within ±0.03mm, flatness error not exceeding 0.08mm/m, and surface roughness reaching Ra0.6, far exceeding industry standards.
• Thermal performance: The heat dissipation shell's thermal conduction efficiency reached 450W/(m·K). When combined with phase change materials, it effectively reduces joint module operating temperature by more than 25%.
• Reliability data: After 1000 hours of continuous thermal cycle testing, the heat dissipation shell showed no performance degradation or structural deformation, demonstrating excellent long-term reliability.
• Production efficiency: Through process optimization, the production cycle was shortened by 35%, and the yield rate increased from initial 85% to over 98%.

Sinbo Precision's joint module heat dissipation shells have been successfully applied in industrial robots, precision servo systems, and aerospace fields, providing customers with reliable thermal management solutions. Through continuous technological innovation and process optimization, Sinbo Precision is advancing heat dissipation technology for high-power density electronic devices.

Sinbo Precision Joint Module Heat Dissipation Shell Machining Case Study - Precision Thermal Management Solutions

CNC Machining Heat Dissipation Shell

Joint Module Thermal Management

Precision Aluminum Machining

Phase Change Cooling Technology

Robotics Thermal Solutions

Explore Sinbo Precision's innovative approach to joint module heat dissipation shell machining. Learn how precision CNC processing and advanced thermal management technologies ensure optimal performance for high-power robotic applications.