26/03/2025 By admin Off

What is Orbital Head Forming System?

A Orbital Head Forming System is a precision metal forming technology used primarily to deform or shape the heads of cylindrical components—such as tubes, pins, rivets, or fasteners—using a controlled orbital motion. It is commonly found in aerospace, automotive, medical device, and precision manufacturing industries for creating strong, consistent, and repeatable head forms.


🔧 Technical Definition:

Orbital head forming is a cold-forming process that uses a conical forming tool (called an orbital head) that presses against a stationary or rotating workpiece at a shallow angle (~3–6°), while moving in an orbital (circular) path. This results in gradual, controlled deformation of the material to form a specific shape, such as a dome, flange, or rivet head.


⚙️ Key Components of the System:

ComponentDescription
Orbital Head/ToolConical forming tool that rotates at a controlled angle and applies pressure to the part.
Spindle AssemblyDrives the orbital head in a pre-defined circular path, usually with low RPM (~100–1500).
Actuator or RamApplies vertical forming force using hydraulic, pneumatic, or servo-electric power.
Fixture or AnvilHolds the workpiece securely in place to prevent misalignment or slippage.
Control Unit (CNC/PLC)Controls forming time, force, orbital angle, head speed, and stroke position.
Force/Displacement SensorsUsed for process monitoring and real-time quality control.

🌀 How It Works (Step-by-Step):

  1. The part (e.g., a tube or pin) is loaded into the fixture.
  2. The orbital head begins rotating at a shallow angle (typically ~5°).
  3. Downward force is applied gradually as the orbital head rolls around the periphery of the part.
  4. The head is formed uniformly without excessive impact, heat, or material waste.
  5. The final shape (e.g., dome, mushroom, flare) is achieved through controlled plastic deformation.

📐 Typical Forming Applications:

  • Rivet and stud head forming
  • Sealing and flaring tube ends
  • Automotive ball joint or bushing assembly
  • Fastening dissimilar materials (metal to plastic)
  • Crimping medical devices and connectors

✅ Advantages (Technically):

FeatureTechnical Benefit
Low Force, High ControlReduces stress and cracking vs. traditional pressing.
RepeatabilityIdeal for precision components (±0.01 mm tolerance).
No Vibration or ShockMinimizes tool wear and damage to delicate assemblies.
Cold FormingNo heat zones or metallurgical changes to the part.
Customizable ProfilesTooling can be shaped for domes, flares, or special forms.
Quiet OperationLower noise levels than impact forming or press riveting.

🏭 Typical Industries Using It:

  • Aerospace: Rivet forming on aircraft panels or turbine components
  • Medical: Precision crimping of surgical tools or catheters
  • Automotive: Shock absorber or bearing housing formation
  • Electronics: Forming connectors, terminals, battery caps

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