Press Brake Bending Force calculation

Hydraulic press brake bending capacity is max bending force can be applied for sheet bending. Normally when we select press brake, we shall use high capacity than our max force needed. It will be good for machine life and future machine capacity attenuation with parts wear.

So first we shall know how much bending force will be needed for our job. The bending force is related with following parameters:

  • Sheet Material (mild steel / Stainless steel /Al /copper or others);
  • Sheet thickness ;
  • Sheet length;
  • Hydraulic press brake bottom die opening width;

For example: mild steel yield strength is 450Mpa, we can us following formula to calculate. while for Stainless plate, the yield strength will be higher, hardness will be higher, spring back rate will be bigger. we can use same formula but time some rate. The force can be 1.5 times of mild steel plate.

According to Plate thickness (S), Opening width of the bottom die (V), we can quickly find estimate bending force need for mild steel plate according to following table.
press brake bending force form