Calculating Unfolded Lengths

SpaceClaim can use sheet metal bend deduction to calculate unfolded lengths. You can set the default Sheet Metal Options in the SpaceClaim Options window.

You can change the default bend properties for a specific component or bend by selecting the component or bend and modifying the values in the Properties panel:

• The Bend Allowance property contains the length of the arc through the bend at the neutral axis of the sheet metal wall being bent. Adding the Bend Allowance and the lengths of the two sides give the unfolded length.

• The Bend Deduction value for the selected bend represents 2 times the Outside Set Back (OSSB) minus the bend allowance.

Bend Allowance (BA) and Bend Deduction (BD) are linked. Modifying one value causes the other to be automatically recalculated as follows.

BD = 2 x OSSB - BA