Pipe flange, how to time slotted features
Pipe flange, how to time slotted features
(OP)
Hi All,
Hoping you can help with a question.
I have a part as shown in the attachment. I want to control the rotational orientation of the slots with respect to the holes in the base flange. I'm not sure of the best way to achieve this, can anyone offer some suggestions? The parts mounts via the flange and holes, an additional part is then located in the end via the top slots.
I was thinking something like the shown datum scheme.
Thanks.
Hoping you can help with a question.
I have a part as shown in the attachment. I want to control the rotational orientation of the slots with respect to the holes in the base flange. I'm not sure of the best way to achieve this, can anyone offer some suggestions? The parts mounts via the flange and holes, an additional part is then located in the end via the top slots.
I was thinking something like the shown datum scheme.
Thanks.





RE: Pipe flange, how to time slotted features
RE: Pipe flange, how to time slotted features
RE: Pipe flange, how to time slotted features
I should probably have mentioned that you'll want another position tolerance on the two holes that create datum B, similar to Figure 4-39.
Once you have a fully constrained part, you can locate just about anything using the proper GD&T symbols (in your case, position).
RE: Pipe flange, how to time slotted features
RE: Pipe flange, how to time slotted features
The pattern of 4 holes as a datum feature will yield two perpendicular planes that are also mutually perpendicular to datum plane A. The intersection of these two planes can be considered a datum axis. However, it is not the axis of the shaft. The OD of the shaft will also need to be positioned to your datum scheme, as will the OD of the flange. The shaft OD and the flange OD are RFOS (regular features of size). They need to be controlled for size, shape, orientation, and location. Your size limits will give you size and shape control. The position FCF will cover the orientation and location control.