New steels have required a change in die design, necessitating more durable die steels and overbending
of panels due to their greater tendency to spring back.
The spring back angle also has to be calculated for overbending
at final step.
This prevents overbending
and provides enough wire for strain relief.
Correction methods include overbending
a metallic sheet compensates for springback by bending it farther than what is required for the finished product.
Some parts also require overbending
and additional operations that must be built into the CAD data.
Half rounds, ellipses and cathedral shapes of high accuracy can be laminated, the company says, and overbending
for springback, unlimited extended legs and fine tuning of shapes from 6-in.
Low-voltage boxes allow you to push the extra length of wire into the wall cavity without overbending
Likewise, heavy weight in the blank can produce overbending
in the area of contact with the bending die, which will be reflected in the final part.