Mastering Dimensional Tolerancing for Enclosure Assembly: Tips and Tricks

[jmech]

I am in the process of dimensioning a drawing set of an enclosure assembly, and I am struggling to figure out how to tolerance the part correctly. The assembly is essentially a rectangular prism with rounded corners, it consists of two parts: the main enclosure and the face plate which must fit inside the enclosure.

I attached a simplified version of the enclosure I am talking about.

As I said the faceplate has to sit inside the enclosure, I was hoping to achieve a fit similar to a H7h6 clearance fit, but since this is not a shaft I don't know how to annotate it, or if this is even the right way of going about the tolerance in the first place.

I am still a student so forgive my lack of understanding, tolerancing is something I don't think was taught to my class well.

 

[nilesh_pat]

Any help is much appreciated. The best way to go about the tolerance on this assembly will be to use a maximum material condition (MMC) symbol. This will allow you to specify how much material can be removed from the faceplate and still fit into the enclosure. You would then need to specify the size of the clearance between the two parts (H7h6). The MMC symbol would look like this: "Ø D1 max". The "max" indicates the maximum material condition which is the most restrictive tolerance for the feature. This will ensure that the faceplate fits correctly into the enclosure.