This is a cross section of a sealed hinge, as you can see I can't mate it like a standard hinge because it has multiple radii in both parts. Is there an interference mate or something similar I can use to turn this into a working assembly?
Could you upload a small sample model of the two parts?? and I think I can get it from there, but need to mess with it ...
Here you go John
Is this how they are connected?? - And how far is the swing??
Yes, the flats start parallel on the same side of the pivot area, and the opening degree is limited by the interference of the multiple radii that make up each piece. In application it will only open to about 100deg due to outside limiters.
So, like a lot of mechanical components these move due to surfaces contacting and sliding against each other. I haven't downloaded your parts, but what about concentric mates, tangent mates, and even a cam mate? Wouldn't these constrain the parts similar to their real world situation?
I've never really messed with cam mates. I have it constrained with coincident and tangent mates but it's not quite right, and the tangent mates are sloppy. They're always jumping to the "other side" of its tangent circle and messing everything up.
Shane Kozlowski take a look at the sample file - hopefully with the attached sample it'll be brain stimulation for a Friday - I'm sure there are more ways to do this, but I still think you need an ellipse or a spline sketch so the pivoting part follows, but the key here is the small domed pc in the one part and a sphere in the other part, that keeps the hinges from jumping - let your mind wonder from there, but let me know what you ended up with. You could also tie in a distant mate that it only opens so far, but I am running out of time..
I never was a fan of the cam mates, they would keep flipping from one side to the other.
I don't have a good solution, these path mates are all I could come up with. I feel like its pretty close, BTW the open end of the hinge goes down in application, Just so you may understand the path physicality a little.
A spline sketch mated to a sketch point has a lot of possibilities
Cam mates are extremely handy once you figure them out. The SWX help is generally pretty good, even though there are plenty of times I'm still not getting "it", i.e., the help needs more help.
A lot of times when I set up a cam mate I'll have right next to it one or more other mates to use when the cam mate is suppressed. Since the cam mate and tangent mate can flip this has become a necessity. See: Provide Controls to Prevent Tangent and Other Mates from Flipping
If I were you I would simply add an axis at the center of rotation of each component and mate the two axes coincident.
That is what I tried as well, but I thought that's not what he was asking for, if Shane Kozlowski needs to have the hinge move and show it within the window of motion, then it takes a different approach...
Scott Stuart, Good advice. Very practical, especially since the geometry is a bit complicated for other mates. This might not give a perfect representation of the motion, but it will be pretty close and very stable.
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