How much clamping pressure is required to clamp part securely?
we recently bought a Makino wire EDM,that's our first edm of the shop.So, not many people know much about EDM in my shop. I would like to ask a stupid question. How much clamping pressure does a 6 by 6 inch part about 2inch thick ( the numbers a made up,just would like to see something in prospective ) clamping one side on about .5-.75 " of table? .one more thing I understand that having 2 clamps is great but can i get away with one clamp clamping the part?.
I am use to running Mills so I tend to tighten stuff harder than I have to.I will greatly appreciate your input.
You need very little clamping pressure to hold a part for wire EDM.
You need to clamp against the force caused by the flushing pressure: the actual cutting is a force-free non-contact process.
You also need it secure enough that you can manage slugs, measure your parts. clock your blanks in place, resist gravity if you're clamping into a vise and hanging it into the worktank etc etc.
2 clamps is always better than one, but one will often suffice if your workpiece is smooth and flat on the surface that will be in contact with the table.
It should be very smooth and very flat; fine milled or surface ground both to protect the table from being marked up and to ensure the part is nice and level in the tank.
My tank has 8mm threaded bores in it; I tighten my bolts with a standard 8mm allen key and I don't reef the snot out of them, maybe 20 foot pounds of torque at a guess.
I don't tighten a 3mm thick strap clamp enough to bend it.
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Vancouver Wire EDM -- Wire EDM Machining
very little force is required on edm machines due to virtually minimal cutting forces
Originally Posted by implmex
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