Adjusting materials

[davidSWEUU]

I have been struggling with this for a while. I work primarily in the sheetmetal area of Fusion. After I create my part and generate the flat layout, the cut size is always different from what we would normally use in the shop. for example, I have attached a 16ga stainless counter top that we would cut at 144" based on my dimensions and the shop calculations.  the stretch out in fusion is 144.05 (1/16" bigger than I want)  What parameters should I be changing?  I want a tight corner, no relief and adding a single metal thickness to the bend.  Any help is appreciated and would save me time in the future going over all the dimensions in the drawings.

[g-andresen]

Hi,

please share a sample file

günther

[jhackney1972 · Accepted solution]

The K-Factor for the material is what you want to recalculate.  This setting governs how the much the metal will bend in relation to the neutral axis of the material.  Out of the box, Fusion 360 uses a K-factor of 0.44 so if you want to shorten your flat pattern you will decrease this number.  The amount of material change is also determined by the bending process used in your shop so you may have to use different K-Factors depending on the process.  There is an free application out there that may help you determine the correct K-Factor for your material and process.  It is called Bendworks.  Here is the documentation included with the application and here is a link to download it.

[davidSWEUU]

Thanks!

For some reason I didn't consider the K factor since this isn't something used down on the floor.  For the record, to make the material grow just a single material thickness without accounting for any shrinkage/growth, I used a k factor of 0 to remove it from the equation. works exactly like I want now!  (I know some engineers would frown on this, but our tolerances and equipment work well with this method and we get near exact overall dimensions this way.)

David.