Improving Productivity at the press brake

Press Brake optimized Nesting

PEP can help with Press Brake optimized operations.  

Because of the unique nesting requirements of the press brake, the rotation of parts can dramatically increase the number of required head raises.  Using the PEP “Soft Grain” feature will automatically nest parts that are ready for the press brake without "built in" accuracy issues.

PEP can also create "mini nests", which are a set of small parts destined for the press brake, that PEP leaves 'tabbed' together as a single part.  This allows the press brake operator to fabricate multiple parts in one operation. Bending multiple simultaneously improves the productivity of the press brake operator, improves the accuracy of the bend, and makes the press brake safer. 

 

Accuracy

The rotation of nested parts can effect the accuracy of parts if the same part cut at different rotations is fabricated using the same reference location. It is common for parts cut at different rotations to deviate in accuracy of the part by as much as 3 degrees when bending ordinary everyday parts that are not nested correctly on the sheet. A three degrees bend error can cause a hole alignment error of .25” as well as other accuracy problems.

The three degree error is induced into the part by the brake at the time of bending when a part is cut on a sheet of material at 90 degrees to the rotation of the parts that the operator used to setup the brake.

In PEP logic, you'll see the parts are always nested at 180 degrees to each other. The 180 degree rotation eliminates the 3 degree issue and the parts will bend correctly, as if the parts were all nested at zero degrees.

Be wary of nesting products that will nest press brake parts at four rotations of 0, 90, 180, 270  creating an issue for bending.  If the end user tries to fab up the parts some of the parts will have the bend error of 3 degrees.  Some nesting products have a work around, but they typically reduce the number of parts nested on a plate.