Temporary Vibration Damping Material
Temporary Vibration Damping Material
(OP)
I am machining through slots w/ 10mm endmill in 1/8" wall 2" ID steel tubing of various lengths. Parts are ID chucked on index table on one end & supported w/ tailstock on the other. Parts are as long as 13" so chatter & deflection become a problem.
I inhereted this & company is reluctant to change holding system (I'd like to put it on an expanding mandrel!) Cell takt time does not allow rough & finish passes. I have to finish one side of slot from solid then other side is almost a skim cut.
Have already gone to asymetric flute endmill which helped a great deal, but now I need to attack the part/setup.
Years ago, I machined impeller tips while space between blades was filled with wax. Something like this, or an expanding foam MIGHT help me with my problem, but I don't know what to look for.
Whatever I use must set up quickly (one-piece flow with a takt time of about a minute!), be easily and quickly removable, and prefeerably, either resuable or VERY inexpensive (ah the joys of modern industry!)
Any ideas?
I inhereted this & company is reluctant to change holding system (I'd like to put it on an expanding mandrel!) Cell takt time does not allow rough & finish passes. I have to finish one side of slot from solid then other side is almost a skim cut.
Have already gone to asymetric flute endmill which helped a great deal, but now I need to attack the part/setup.
Years ago, I machined impeller tips while space between blades was filled with wax. Something like this, or an expanding foam MIGHT help me with my problem, but I don't know what to look for.
Whatever I use must set up quickly (one-piece flow with a takt time of about a minute!), be easily and quickly removable, and prefeerably, either resuable or VERY inexpensive (ah the joys of modern industry!)
Any ideas?





RE: Temporary Vibration Damping Material
In space applications we would discuss using "urinal salt" as temporary fixturing for flexible parts during launch (paradichlorobenzene, now a banned chemical; think mothballs) because they would evaporate away... For your part, removal would require you to pull a vacuum on the chips/parts...but dunno if it would work with whatever urinal cakes are made from today. And it still takes time to pour/set/remove the cores.
A laser or waterjet cut would eliminate the chatter/vibration issue, if you can live with the tolerances of the processes...and if you have acce$$ to them.
Hmm. A little more thought: what if you slipped a wax plug into the i.d. that was a bit longer than needed, then compressed the wax by pushing on the ends, causing it to expand to fit the tube. It wouldn't adhere that well, but might offer enough support to be useful.
RE: Temporary Vibration Damping Material
One thing that happened to me on project where we were slotting tubes with a little heaver wall was to us an opposite hand cutter from the one we had been using.
Outside the box:
At one time we use lead putty, since outlawed.
Similar to the wax we used low melting alloys on very critical parts. The could be moulded to take in account your slots.
You try a machinable wax round insert. Not to machine into but act a dampener.
Actually anything inserted in the tube will help like plastic or wood.
Can you build a jig to contact the tube on the opposite side from the milling.
RE: Temporary Vibration Damping Material
RE: Temporary Vibration Damping Material