MAZAK 5-Axis CNC Machining for Complex Parts: Achieving Mirror Finish on 7075 Aluminum

Precision CNC Machining of Complex Robotic Components in 7075 Aluminum.

When your engineering design calls for lightweight, high-strength robotic components with complex contours and micron-level tolerances, standard 3-axis machining falls short. This case study details the 5-axis CNC machining of a critical robot main joint housing, demonstrating how we transformed a solid block of 7075 aluminum into a finished, mirror-quality part—all in a single setup.

We specialize in the custom CNC machining of complex parts for the robotics, aerospace, and automation industries. If your project requires precision machining of aluminum, stainless steel, or titanium alloys with complex geometries and stringent surface finish requirements, we have the solution.

Why 5-Axis Machining is Non-Negotiable for Complex Parts

The robotic joint housing in this case features undercuts, angled mounting faces, and deep internal cavities that make 3-axis or even 3+2 axis machining impractical. These conventional methods would require multiple repositioning setups, each introducing a chance for positional deviation and tolerance stacking.

Our MAZAK simultaneous 5-axis machining eliminates this risk entirely. We machine the entire component in a single clamping operation. This provides several critical benefits for your project:

Design Advantages

• Monolithic Complex Structure - Multi-feature integration in one piece eliminates assembly errors and enhances overall rigidity.
• Internal Channels & Conduits - Internal cooling channels and cable conduits are directly machined, resulting in a clean exterior and high reliability.
• Optimal Strength-to-Weight Ratio - Topology-optimized lightweight design combined with 7075 material delivers superior dynamic performance.
• Datum-Free Assembly - All critical mounting surfaces and bearing seats are finished in a single setup, guaranteeing exceptional geometric tolerances and coaxiality.

Process Control

• 5-Axis Dynamic Milling
• On-machine Probing for Automatic Compensation
• Residual Stress Control Process
• Full-process Temperature-controlled Machining

Quality Reports

• Full 3D Scan Inspection Report (CAD Comparison)
• Material Test Report (MTR) - Chemical & Mechanical
• Critical Bore Roundness / Diameter Special Report