Profile tolerance on a surface with a draft

[cm_eng]

I'm currently working on the part shown below. I want to control the profile of the surface shown in red to +/- 0.002". The part is to be injection molded, and consequently the surface has a draft. Because of the draft, I'm not sure how to apply the profile tolerance, since the surface is not completely perpendicular to the top view. I could potentially do a profile of a line at several cross sections, but that is difficult to inspect, and it seems there must be a better solution. Anyone know a good approach to this? Cheers

 

[chez311]

cm eng,

Profile of a surface may be applied to a drafted surface without issue. In fact this is the preferable way to tolerance such complex surfaces - profile of a surface may be applied to a surface of any inclination or curvature imaginable.

 

[greenimi]

ASME Y14.8-2009 (casting standard) has figure B1 and surface profile is shown on drafted features (section A-A and outside surfaces)

 

[chez311]

To add to that, one could consider an even more simple example: ASME Y14.5-2009 shows several examples of profile applied to a cone (ie: fig 4-45) which is essentially a single drafted feature.