Controlling flange for overbend and height

[Explorien86]

Hello,

I am trying to define a flange on a hook-type part using GD&T. The problem is the part does not maintain consistent angles throughout nor heights. I have attached am image a section from the part.

The goal is to control the main surface and the return flange height at the tangent coming off the radii, but I do not care much about the (red) radii value. After that I only want to control that the flange does not open up, only bends further inward. I have approached it with surface profiles controlling the main surface (blue edge) and a unilateral surface profile of the flange (green edge), but then nothing is controlling the height. Because the height varies throughout the part, I didn't want to dimension at each section.

Anyone have any ideas how to approach this?

Thank you in advance.

 

[drawoh]

Explorien86,

The current principle when preparing any fabrication drawing is to specify what you will accept from the fabricator. Don't tell them how to do it.

In your case, you need an accurate height and an accurate flange angle. Specify those. Put a sloppy tolerance on the bend radius. Let the fabricator figure it all out. On something like this, I generally figure there is no need for an accurate flange width.

--
JHG