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Is a relief slot needed for this sheet metal bend?

Question asked by Stephen Reed on Jan 9, 2017
Latest reply on Jan 9, 2017 by Bernie Daraz

I have this sheet metal part that has a down 90° tab.  There is some discussion whether or not a relief is needed (see picture below). I haven't worked in sheet metal in a number of years but I seem to recall that this relief was needed by our shop to create the bend.  My problem is I can't recall why.  I am hoping some of you sheet metal experts can confirm if this is needed to make the part and if so why?

 

Thanks,

Steve

 

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