Bend Allowances and Deductions

[KB7GP]

If I begin a sheet metal project, where do I enter my known BD (bend deductions) and BA (bend allowances) or view the build in constants? These are, of course, important when flattening the sheet metal to represent the material dimensions necessary. I see nothing about or a reference to these settings.

Dave KB7GP 

[jhackney1972]

Add materials and associated sheet metal rules as shown.  The screen shot was taken for the new UI Preview.

[Anonymous · Accepted solution]

This only allows you to enter K factor, I would like to use bend deduction.  How do I select that option?

[jhackney1972 · Accepted solution]

The ability to add bend deductions is not available in Fusion 360 at this time.  You will have to calculate backwards and come up with a K-Factor.  There is a free shareware application that will allow reverse calculation of K-Factor called BendWorks on the web if it helps you out.

[KB7GP]

Thank you for the response. This will make the calculations much easier. I have all the formulas, it's just a hassle to go through them. Before I retired, the company always used "air-bends". The never wanted to "bottom out the dies". Therefore, the calculations were often off. They generated a chart from actual data for our most commonly used brake angles and metal thicknesses as well as metal type (aluminum, galvanized and several grades of Stainless). From that chart I could choose any of the various results. I mostly used the BD or BA since that was the most expedient for me in SolidWorks. Wish I still could have a copy of that software... simply TOO expensive for my private use.

Again thank you

Dave Robinson, KB7GP