In other words, you can say that the total length of the flanges of the bent sheet is always greater than the length of the flat sheet or flat pattern. So my point here is to establish the fact that it is necessary to design the flat pattern also, along with the design of your final or finished component.Īnd, the interesting and surprising thing is that the total length of the bent sheet is always greater than the length of the unfolded piece of the sheet. Then how will he fabricate the final component? If you just provide the design of the final component, it will not be possible for the fabricator to create or produce a flat pattern for your component. After that, he will make all the forming operations, whether it is punching, bending, or any other. He will have to create a flat pattern first. But this is not enough for the fabricator to fabricate your component. And, you have all the dimensions of the final component in your design. Suppose that you have designed a sheet metal component for fabrication. First of all, let me explain why and where you need to use this Bend Deduction. Just like BA and K-factor, Sheet Metal Bend Deduction is also a very crucial part of sheet metal design terminology. In today’s post, I am going to discuss Bend Deduction.

In my previous post, I discussed the Bend Allowance ( BA).