How does a pipe bending machine work?

1. The Pipe Is Clamped

The straight pipe or tube is placed into the machine and held tightly by:
Clamp die
Pressure die
Bending die
Mandrel
This prevents slipping during bending.

2. The Bend Die Rotates
   A round bending die rotates and pulls the pipe around its radius.
   This creates the bend angle:
   45°
   90°
   180°
   custom angles
   The bend radius depends on the tooling size.
3. Mandrel Support (Optional)

For thin-wall tubes, a mandrel is inserted inside the pipe.
The mandrel helps:
prevent collapse
reduce wrinkles
maintain roundness
This is important for:
automotive exhaust pipes
furniture tubes
aerospace tubing
hydraulic tubes

4. CNC Control System
   Modern CNC pipe bending machines use computer control to automate:
   bend angle
   rotation
   feed length
   multiple bends
   The operator inputs the program, and the machine performs repeatable bending automatically.
   Typical CNC axes include:
   Axis Function
   Y Feed pipe length
   B Rotate pipe
   C Bend angle
5. Finished Bent Pipe
   After bending, the finished part may be used in:
   automotive parts
   furniture
   construction
   HVAC
   medical equipment
   shipbuilding
   aerospace