What exactly are you trying to achieve? Do you want to show a cosmetic thread, real thread or an FEA Simulation on threaded hole? Please explain your problem with a little more detail so we can help you
Best Regards,
Heckler
Sr. Mechanical Engineer
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the proble is i assembled a construcction but when i wanna try to simulate ist i don't know how to do it, the thread i wanna simulate is like a screw and a nut
i just need to know how to simulae a mechnisme of a bolt and an nut and when the bolt turns the nut need to follow the thread, it's something like translate and rotate that i have to give it on the same time when i simulate a mechanism but i don't know how to do it?
Isn't there a advanced tutorial that demonstrates averything about assembly and mechanism or something?
i need to know how to simulate is the thread not a animation expecialy how can i rotate and slide a part with theard on the same time an the mechanism application mayby by servo
If you have created thread geometry, make a datum curve through an edge on one of the parts, and a datum point on the other part at the very end of the thread (so that the point would be directly on the edge/curve while the nut is turning).
Then when in Mechanism mode, create a Slot connection between the curve and the point. This will allow you to move the nut as it would be moved in real life.
If you don't have thread geometry, search back through this forum for tips on making helical curves.
The nut has to be assembled using a cylinder connection first.
There is an easier way, actually. I just tried it and it worked.
A cylinder connection makes 2 degrees of freedom: one rotational joint axis and one translational joint axis.
You can get the same effect as the nut threading on by creating a gear connection between the two joint axes created by the cylinder connection. The gear connection is a Rack and Pinion type connection, however.
Assemble the nut onto the screw using a cylinder connection (when you assemble it, press the "Connect" tab at the top of the assembly dialog).
Go into Mechanism mode, and create a gear connection using Mechanism-->Gears.
Change the type to Rack and Pinion, and pick on the joint axis icon between the nut and screw for both the rack and pinion settings. It will automatically choose the correct one for each. Under the Pinion tab, you have to enter the pitch circle diameter. Since it thinks this is a rack and pinion, it will translate the rack axis by:
3.142*Pitch_Circle_Dia (for every full turn of the pinion)
So, work backwards and take the pitch of your screw and divide it by 3.142 to get the pitch circle diameter to use.
i.e.) For a M8x1 thread, the pitch circle diameter is:
Dp = 1 mm / 3.142
= 0.318 mm
It sounds more complicated but its actually much easier since you don't need thread geometry or helical curves.
