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Avoiding Cross-Threading

Question asked by John Wayman on Nov 17, 2017
Latest reply on Nov 17, 2017 by Kevin Chandler

Not strictly to do with Modelling & Assemblies, or even Solidworks at all, but there are lots of clever people on this forum, so I thought it was worth asking:

I have seen videos of manufacturing plants, such as car plants, where multiple spindles are used to drive a number of nuts simultaneously. For example, I have seen a 5-spindle nut-runner fit all 5 wheel nuts at once.

How do these systems prevent cross-threading of the nuts?

I can see how getting all the nuts on the end of the studs aligned in X and Y could work, but I struggle to see how to avoid a small angular misalignment between the axes of the nut and the stud, particularly when there are several such pairs being aligned at the same time.

I know there are thread forms that are impossible to cross-thread, but wheel nuts are just common-or-garden M10 threads, I think.

Any tips from the experts on how to automatically fit nuts to studs without cross-threading?

 

John

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