I must be having an off day, but I could use some help. Ihave a very plain U-channel piece. It's bent out of .1046" sheetmetal and is 2.500" OD across the flanges that are equal length(6.00").
It's my understanding that when you dimension across two bends,which are assummed to be bent at 90° (undimensioned), thatthat dimension is carried all the way down the part. So, my part isdimensioned 2.500±.015 across the flanges and i would assumethat diminsion would be held at the bend and on the open end. Myvendor is saying they can only hold that at the bend, which I'mperfectly fine with, but then how do I properly control thedimension on the open end of the u-channel.
Secondly, our standard tolerance block say the tolerance on a bendis ±0.5°. Because the flange is 6.00" long, that wouldtechically allow the flange to be .052" off the true position. Sowhich dimension trumps. keep in mind the 90° isn't actuallydiminsioned, but just understood.
This image might help.
Thanks for review this post!SolidworksSheet Metal
It's my understanding that when you dimension across two bends,which are assummed to be bent at 90° (undimensioned), thatthat dimension is carried all the way down the part. So, my part isdimensioned 2.500±.015 across the flanges and i would assumethat diminsion would be held at the bend and on the open end. Myvendor is saying they can only hold that at the bend, which I'mperfectly fine with, but then how do I properly control thedimension on the open end of the u-channel.
Secondly, our standard tolerance block say the tolerance on a bendis ±0.5°. Because the flange is 6.00" long, that wouldtechically allow the flange to be .052" off the true position. Sowhich dimension trumps. keep in mind the 90° isn't actuallydiminsioned, but just understood.
This image might help.
Thanks for review this post!SolidworksSheet Metal
