I have a metal door, just a flat piece with formed edges for rigidity. The prototype had an issue with concave bowing. Concave bowing is not acceptable, but x-amount of convex bowing is ok...I'm not quite sure how to call this out on the drawing. I immediately think of a straightness...
No tertiary datum is needed for the second pattern since D establishes 2 planes at once. If pattern D were to be clocked in one way or the other, the second pattern would clock with it. As far as I can tell, your example looks fine.
Please take a look at the attached image.
Do the hole centerlines imply that the outer edges are square with the hole pattern? Or do I need a clocking datum (one of the widths) to line everything up correctly?
Thanks!
Please see the attached drawing.
I am using ASME Y14.5-2009, I think the '94 version would have "two surfaces" in place of my "2x", but anyway...
Profile of a surface requires the true profile to be established with basic dimensions. I can't find anything in the standard that overrides this...
If you have a profile with radii at corners and straight sections between them, I don't think the all-around symbol can be used on the radii dimension leader. The reason being that the dimension is only applicable on the radii - but the all-around symbol is telling you to apply it everywhere on...
Saving a little math was the only practical reason I could think of, but since I'm not experienced I figured I better consult with the masterminds. I also thought since the centerplane is what goes into establishing the DRF, technically this is what you should dimension from.
When you have a pattern of holes as a datum, do the dimensions for other features come from the centerplane derived from the pattern, or from the center of one of the holes? I've been searching around and I keep finding it done both ways, are both ways really allowed? I believe inspection is...
Defining a hole is an interesting thing. A hole dug in the ground is quite a different beast from a hole in a sweater.
I'd be inclined to think "hole" would need a definition referenced on the drawing somewhere. Or at least more specific, ex. drilled thru hole
In all my areas of CAD work (electrical, civil, architectural) I have always used, and seen, a dot for a leader to a surface, as KENAT said. A dot will read "surface" and the arrow would read "this point on the surface", but I don't know if this in a standard anywhere.
