Taikan Robot Structural Parts Machining Solutions

High-Precision CNC Machine Tools for Humanoid Robots and Quadruped Robots

Humanoid robots and quadruped robots are entering commercial production faster than ever. As manufacturers move from prototypes to volume production, machining consistency and production efficiency become as important as product design.

A typical humanoid robot includes hundreds of precision robot structural parts. These range from hip frames and thigh housings to finger joints, center shafts, flanges, and other critical components. Most robot structural parts are machined from 6061 or 7075 aluminum alloys, while selected transmission components are made from 40Cr or 45# steel.

For manufacturers, achieving micron-level accuracy while maintaining production efficiency has become one of the biggest challenges.

As a leading CNC machine tool manufacturer, Taikan Machine supports robot manufacturers with machining solutions for every stage of production—from prototype development to mass production. Our solutions help improve machining quality, reduce setup time, and increase manufacturing efficiency.

Manufacturing Challenges in Robot Structural Parts

Robot structural parts are markedly different from traditional industrial components. They combine lightweight designs, tight tolerances, and complex geometries in a single workpiece, making machining much more demanding.

High-Mix, Low-Volume Production

The robot industry is still evolving rapidly. Most projects involve engineering validation, pilot production, or continuous design iterations. Frequent model updates require flexible cnc machining center capable of handling numerous part variations while minimizing programming time.

Tight Dimensional Accuracy

Most structural parts require machining accuracy within 0.02 mm. Critical joint components demand tolerances as tight as ±0.005 mm. Every setup must maintain that accuracy to ensure reliable assembly. Maintaining this level of precision throughout multiple machining operations is essential for final assembly performance.

Complex Multi-Face Geometry

Components such as hip frames feature multiple mounting holes, locating surfaces, deep pockets, lightweight cavities, and compound angles.

Traditional 3-axis machining often requires multiple setups. Each repositioning may introduce 0.005–0.008 mm of deviation. After several setups, the accumulated error can exceed 0.03 mm.

Thin-Wall Deformation

Many aluminum alloy structural frames incorporate wall thicknesses below 1 mm to reduce weight. Maintaining rigidity during cutting is critical to minimizing chatter, tool deflection, and dimensional distortion.

Process Planning Gap

Since the humanoid robot industry remains in an early development stage, manufacturing specifications are still evolving. In some cases, unnecessarily conservative design requirements increase machining costs without delivering measurable performance improvements.

Five-Axis Is Not Always Necessary

A common misconception is that all complex robot components require simultaneous 5-axis machining. In reality, 3+2 machining configurations already meet the needs of most robot structural-part applications, offering an excellent balance of flexibility, productivity, and investment.

Four Major Categories of Robot Structural Parts

Robot structural components can generally be classified into four machining categories.

1. Cavity-Type Components

Typical parts include:

• Clamps

• Flanges

• Mounting plates

• Support plates

• Heat dissipation covers

• Connecting links

These components primarily involve planar milling, drilling, tapping, and pocket machining.

2. Dexterous Hand Components

Including:

• Fingertips

• Finger bases

• End caps

• Palm housings

Although relatively small, these components contain highly intricate geometries and require excellent machining stability.

3. Multi-Angle Freeform Structural Components

Typical examples include:

• Hip frames

• Lower leg structures

• Waist frames

These parts feature complex freeform surfaces, multiple angular features, and intersecting holes that benefit from multi-axis machining.

4. Shaft, Pin and Disc Components

Including:

• Gear center shafts

• Bushings

• Flanges

• Precision pins

These rotational parts are ideally suited for a cnc swiss type automatic lathe or turn-mill machining, especially when producing small-diameter shafts, pins, bushings, and sleeves in consistent batches.

Together, these four categories cover almost every structural part of a humanoid robot. They range from the main body frame to precision finger assemblies.

CNC Machining Strategy for Different Production Stages

Selecting the right machining solution depends not only on part geometry but also on production volume.

Prototype and Small-Batch Production

During product development, machining flexibility is the highest priority.

Recommended solutions include:

• Cavity-type parts: T-500S Tapping Center with touch probe for in-machine inspection

• Complex freeform components: T-500U 5-Axis Tapping Machining Center for complete multi-face machining in a single setup

• Medium-sized structural components: T-V856H Vertical Machining Center equipped with a 4th-axis or 3+2 rotary table

High-Volume Production

As robot manufacturing enters large-scale production, machining priorities shift toward cycle time, consistency, and cost efficiency.

Typical production strategies include:

• Integrated die-casting blanks with CNC finishing of critical mounting surfaces and precision holes

• Three-axis and 3+2 machining centers as the primary production equipment

• Swiss-type lathes and turn-mill centers for one-step machining of shafts and pin components

Taikan Machine Solutions for Robot Manufacturing

Taikan Machine offers a complete CNC equipment portfolio covering virtually every machining requirement within the robot manufacturing industry.

High-Speed Tapping Centers

Designed for high-speed production of small and medium precision components.

Key advantages include:

• 24,000 rpm spindle

• 1.0-second tool change

• Lightweight moving structure

• BT30 spindle interface

• Optional touch probe for in-machine measurement

  
  

Ideal for high-efficiency production of aluminum robot structural parts.

Vertical Machining Centers

Designed for long-term stability and precision, Taikan vertical machining centers provide the rigidity required for demanding robot structural parts.

Features include:

• BT40 spindle

• One-piece cast iron machine structure

• C3-grade precision ball screws

  
  

The S Series provides an economical machining solution, while the H Series features hollow cooling ball screws for enhanced thermal stability.

When equipped with a 4th-axis or 3+2 rotary table, these machines efficiently process multi-angle structural components.

5-Axis Tapping Machining Centers

Designed specifically for complex multi-face machining.

Key features include:

• DD direct-drive A/C rotary table

• Large-diameter C3-grade precision ball screws

• 48 m/min rapid traverse

• Full simultaneous 5-axis configuration

Ideal for complex robot structural parts requiring multiple machining orientations.

5-Axis Vertical Machining Centers

For larger structural components and demanding materials, a 5-axis vertical machining center can complete multiple surfaces, angled holes, deep cavities, and complex contours in fewer setups.

Highlights include:

• Dual direct-drive 5-axis rotary table

• BT40 high-power spindle with 22.5 kW peak output

• Roller linear guideways for high rigidity

Suitable for one-setup machining of larger multi-face robot components while maintaining excellent surface quality and dimensional accuracy.

Additional Manufacturing Solutions

Beyond standard machining centers, Taikan Machine also provides specialized equipment for diverse robot manufacturing applications.

These include:

• High-end gantry and moving-column 5-axis machining centers for larger workpieces with machining capacities up to Ø650–Ø1000 mm

• Profile machining centers for long-frame structures and base components

• Multi-spindle, multi-channel machining systems for high-volume production

• CNC lathes, Swiss-type lathes, and turn-mill centers for shafts, bushings, flanges, and other rotational components

Why Manufacturers Choose Taikan Machine

Robot manufacturing demands more than precision machining. It requires the right equipment, proven application expertise, and reliable long-term support.

Taikan Machine helps manufacturers meet those demands with complete CNC machining solutions for robot structural parts. From prototype development to mass production, our solutions improve machining accuracy, reduce setup time, and increase production efficiency.

Backed by more than 20 years of CNC machine tool manufacturing experience, five production bases, over 785,000 m² of manufacturing facilities, and an annual production capacity of 32,000 CNC machine tools, Taikan Machine is ready to support robot manufacturers around the world.

Explore Taikan Machine Robot Manufacturing Solutions

Looking for the right CNC solution for robot structural parts?

Discover how Taikan Machine can help improve machining efficiency, accuracy, and production scalability for your robotics manufacturing projects. Visit our website to explore our complete portfolio of CNC machining solutions for the robotics industry.

Wayne Zhao

Chief Technical Expert, Taikan Machine

 

A CNC expert with 10+ years of experience in control systems and machining. 

Formerly with Siemens and FANUC, Wayne specializes in system commissioning, 5-axis programming, and integrated machining applications. He is dedicated to transforming technical expertise into actionable industry insights.