Machine Vice Jaw Mechanism

Machine Vice Jaw Mechanism

seankerslake67
Explorer Explorer
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Machine Vice Jaw Mechanism

seankerslake67
Explorer
Explorer

As in a machine vice with a fixed rotating screw and a sliding jaw, what's the best combination of joints and motion link to move the jaw as the screw is rotated? Cheers

 

seankerslake67_0-1643046764365.png

 

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Joshua.Aigen
Autodesk
Autodesk

Hi @seankerslake67, I did get a simplified version of what your looking for the work with just a block and a coil/thread that will move only with the thread rotating though. This used contact sets on the block and thread, these types of joints use a lot of my computers resources. So it's 100% possible but you may run into performance issues, I've linked my file so you can check it out. A motion link may work better or there maybe an easier way.


Joshua Aigen
Workshop Supervisor
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etfrench
Mentor
Mentor

I would use two hidden dummy components: one cylinder to use in a slider joint and one block to use in a revolute joint.  The cylinder is rigid jointed to the base.  The carriage is slider jointed to the cylinder.  The leadscrew is revolute jointed to the hidden block.  A motion link is created between the revolute and the slider.  Adjust the travel in each joint. Adjust the ratio between them in the motion link.

 

ETFrench

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etfrench
Mentor
Mentor

Here's the file.

ETFrench

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TrippyLighting
Consultant
Consultant

The first thing you should do is to remove the two position capture features. In most assemblies they are not needed.

 

TrippyLighting_0-1643052247712.png

 

Then your slider will be located at the end of the frame, but aligned with the threaded spindle.

Now the temptation is of course to create a slider joint between the slider and the spindle, but then the part would rotate as you rotate the spindle.

Create a as-built slider joint between the slider and the frame. You can still pick a snap point on the spindle.

Then create a motion link between the slider joint and the revolve joint. 


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