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SolidWorks Tips & Tricks
Creating a Base Flange as a Cross Section
There are 5 bends and each has a different radii and angle of bend. Four of the bends in the sketch are inside and one is outside. The single value offered in the dialog box just won’t work to calculate the flat pattern. In fact, let’s try it so we can compare the results to the value we get later when the correct bend factor is applied to each bend area.
The flat length is 22.68968. This was based on a Bend Deduction of 0.096 for all bends. But this is not the correct value. The best method to use is the Bend Tables. Preferably a k-factor table, but even a Bend Deduction table with proper values for different radii would work better. Now let’s try the k-factor table. I created my own long ago. This is the most accurate method, but it is important to check and test the data to be certain it works in your manufacturing operation. Using my personal k-factor table, the flat length is 21.19622. Things to remember when doing this is that the radii dimension I created on four of the bends are outside values and I must account for the material thickness when dimensioning them. Also how good is the data in your table. You may want to manually calculate a few parts to test the data. You can use the Bend Calculator on our website to help with this, www.SheetMetalGuy.com/bend-calculator.htm. To learn more about sheet metal part creation, click here. |
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