Re: Fixturing large stock for facing?
Originally Posted by
CadRhino
Steve,
I just ordered some Permacel double sided tape.
One question for you is how to release my part from the fixture plate.
Here is the scenario - I have a 1" thick by 9" Diameter aluminum fixture plate bolted to the face of my 8" rotary table (using the T-slots/bolts on the face of the RT).
I will have the 1/4" thick x 14" aluminum plate taped to the top of this 9" fixture plate.
After fly cutting the top, I want to flip it over to fly cut and machine the other side.
I have read that denatured alcohol is used to break the bond of the tape.
Since my fixture plate is smaller than the plate I am machining and it is bolted to the face of the rotary table, my challenge is how do I get under the machined plate to 'break' the bond of the tape between the part plate which overhangs the rotary fixture plate by 2 1/2" on each side.
I think typically fixture plates are larger than the parts but I would have to take out a second mortgage to buy a big enough fixture plate and I already had the 1" x 9" diameter round stock.
I could tilt my RT but it is heavy and I will have to re-align it.
Thanks,
Nathan
Couple of thoughts on releasing Nathan -
You could use a little heat to soften the bond (heat gun).
Also, might have already been suggested, but waxed dental floss may allow you to saw along and break the bond. Might take a bit, but would eliminate any tweaking/bending of the plate caused by trying to pry it free.
Bill
Manufacturing & Development
ThermaeCooling.com