CNC Bending Process Tips for Copper Tubes — Prevent Flattening and Cracking

Target Keywords：CNC bending copper tube, copper pipe bending, copper tube flattening defect 

Copper tubes serve refrigeration and heatexchange systems. Copper features good ductility yet is soft and prone to flattening and indentation during CNC bending.

Key process points: Use copperalloy dies to avoid indentations from steeldie contact. Maintain proper bending radius. Mandrel internal support is mandatory for thinwall copper tubes.

Adopt moderate bending speed. Apply coppercompatible forming lubricant. Copper shows relatively low springback but still requires firstarticle angle check per material batch.

Annealed copper tubes deliver much better bendability than hardtemper copper. Select annealed grade if design permits; hard copper has high cracking risk. Regulate clamping force; excessive clamping crushes outer tube surface.