Thread interference

This has probably been discussed before, but I was too lazy to go to google
to search the old threads.

If using the hole wizard to put in tapped holes the actual geometry that is
represented is the minor diameter of the threads (cosmetic thread show the
major dia.). When you put a Toolbox created screw (or any hardware) into the
hole the screw represents the major diameter of the threads. This causes an
obvious interference.

How are people managing interference checking if you have a lot of fasteners
in your assembly? Do you actually have to look at each interference listed
to determine whether it is a hardware interference or a real-deal design
interference problem. TIA for any info you can share.

-Jeff

 

Yep, been discussed before...

Yep, looking at each interference in the list is just about the only way
to "filter" out your fastener interferences.

I think someone here once mentioned they made a macro that would do an
interference detection and then filter the results automatically to
eliminate known fastener interference pairs.

 

I put hardware that is subject to this kind of "acceptable" interference
into an assembly folder. If you suppress the folder, none of the included
items will show in an interference detection listing.

Art W.

 

Respectfully, you should take the time to search. There was an extensive
discussion about a week ago. I am too lazy to rehash it for you.
JJ

 

Jeff,

I make a copy of all fasteners and drill out the bolts. I only use these
bolts.

I do this because I always add fasteners at the lowest sub-assembly level
possible. That way as I add sub-assemblies to my main assembly everything
is already fastened. This prevents me from having to add 1500+ fasteners
later.

I haven't tried the filter them out trick. It does sound promising.

Tom Chasteen

 

Jeff,

That should read drill out the NUTS, not the bolts.

Tom

 

Art,

That's a great idea, with one issue I can envision though. If you have
multiple subassemblies several levels deep you'd have to make configurations
in each subassembly to suppress out the hardware. That could be pretty
intensive managing all the configurations being referenced. I guess the real
catch 22 is that you don't want typical bolt "thread"/mating "thread"
interference to show up but you would want other fastener interference to be
recognized. I'll look up the 'old' thread regarding this topic.

Dreaming: real thread modeling that somehow isn't super resource intensive.
Smart mates would automatically mate the real threads as well (no more
underconstrained fasteners!).....ah maybe one day. Hey, wait. Maybe
SolidWorks could somehow incorporate cosmetic threads to ignore
interference.

 

Use the advanced selection filter in the configuration manager to hide
all the non-fasteners. Then select the fasteners and suppress them.