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Sheet Metal GD&T Questions

Sheet Metal GD&T Questions

Sheet Metal GD&T Questions

(OP)
Hi, I'm Justin and I'm an alc... err... umm... I'm new to GD&T.

I have a U-shaped sheet metal component, approx 1.5" wide, 1.25" tall, and 8" long.  It's .09" aluminum.  Along each vertical side is a series of .094" holes for solid rivets and three .625" x .375" cutouts.  

I want to relate the features from one side to the next and also to each other without having to create a second DRF or duplicating annotations unnecessarily.

Thanks for the help.

RE: Sheet Metal GD&T Questions

rltw,

   I doubt you can eliminate the extra views.  How valuable is your time, and how many times is someone going to have to read the drawing?  With 3D CAD software like SolidWorks, extra views, including 3D views, are easily applied.  They help make things clear.

   Take the case that I have a U-shaped piece with identical eight hole patterns on each side.  I can show both sides on my drawing, apply dimensions only to one side, and specify the holes are 16X.  If everything on the views line up, I would regard this as unambiguous.

   You can cut holes with the specification THRU ALL, however, this is not mentioned in the standard anywhere, and it may not understood by a non-english speaking fabricator.  I would prefer the extra drawing view.

                           JHG

RE: Sheet Metal GD&T Questions

Put a centerline down the middle of the part with symmetry symbols on the ends. Detail only one side of the part.

David

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