A copper heat pipe bending machine is automated CNC equipment that forms sealed, fluid-charged heat pipes into the curved or angled geometries required for final product integration — without damaging the internal wick structure, breaking the hermetic seal, or causing working-fluid leakage. thermalmachinery’s mandrel-assisted heat pipe bending machine supports round pipes from Ø5 to Ø12 mm and flat vapor chambers, delivers bend angles of 90°, 120°, 135° and 180° at ±0.5 mm radius accuracy, and runs 150–400 pieces per hour in fully automated production-line operation.

Why Choose Our Heat Pipe Bending Machine

1.Precision Bending Without Kinking or Internal Collapse

Sealed copper heat pipes cannot tolerate sharp bends or internal collapse. Our machine uses servo-controlled mandrel-assisted bending to form smooth curves while maintaining internal pressure integrity. Bending radius reaches ±0.5mm precision, and internal wick structure remains undamaged throughout the forming process. Pipes exit with consistent wall thickness and no micro-cracks at the bend.

2.Maintains Sealed Integrity During Post-Production Forming

Heat pipes arrive at the bending station already sealed and filled with working fluid. Unlike traditional bending that risks seam rupture or fluid leakage, our machine applies controlled force distributed across a mandrel support region — preventing localized stress concentration at the bend point. Post-bend, helium leak testing confirms zero hermeticity loss.

3.Multiple Bending Angles & Radius Configurations

The machine supports 90°, 120°, 135°, and 180° bends with programmable bending radius (R5–R50 depending on pipe diameter). Servo motor positioning ensures repeatable accuracy across production runs. Changing bend angles or radius requires only software adjustment — no tooling change needed. Supports round pipes (Ø4–Ø12mm) and flat vapor chambers.

4.High-Speed Automated Bending for Mass Production

The machine bends, ejects, and positions the next pipe automatically — throughput reaches 150–300 pipes per hour depending on bend complexity. Integrated with upstream degassing and downstream testing, the bending station fits seamlessly into high-volume production lines without creating bottlenecks.

5.Vision-Guided Quality Control on Every Pipe

A high-resolution CCD vision system inspects every pipe before, during and after bending. Pre-bend, it detects pipe edge and opening direction at ±0.1 mm accuracy to ensure correct orientation. During bending, servo feedback continuously adjusts position to maintain the programmed radius and angle. Post-bend, the system verifies radius and angle against specification (±0.5 mm / ±1°). Any out-of-spec pipe triggers an alarm and is automatically diverted to a reject bin — no defective parts pass to the next station.

Technical Specifications

Where the Heat Pipe Bending Machine Fits in Your Production Line

The heat pipe bending machine is one of the final forming steps — it comes after sealing and working fluid injection, and before final thermal performance testing. At this stage, the heat pipe is a completed sealed thermal device, and bending shapes it for final product integration (curved cooling modules, fitted thermal paths, etc.).

In a typical heat pipe production line, the process flow looks like this:

Tube Cutting → Powder Filling → Tube Shrinking → Degassing & Fluid Injection → Sealing & Welding → Heat Pipe Bending → Flattening (if needed) → Thermal Performance Testing → Final Packaging

The bending machine sits at Step 7, after the heat pipe is fully sealed and functional. Its forming quality determines whether the heat pipe maintains performance in its final curved shape. We supply equipment for every step — the bending machine can be ordered standalone or integrated with our complete heat pipe production system.

How the Automatic Heat Pipe Bending Machine Works