CNC milling tool collision!

This is a High Speed rough milling on my CNC.
It is not a very high tech cnc machine, it is an EAGLE 1000 made in taiwan.
I have a toungaloy tool clamped for this work, it is parametarized at Spindle=1400 RPM and Feed=7000 mm/min it cuts 1mm per pass.
During this operation in the beggining due a wrong proccesing strategic plan we had an impact at this video http://www.youtube.com/watch?v=QwZMSt6GdfY where instead of 1mm it tried to cut 3mm at one pass and had collide

www.noukaris.gr

see also http://www.youtube.com/group/cncs

Category:

Howto & Style

Tags:

• CNC
• milling
• High
• Speed
• roughing
• collision
• machining
• engineering
• machine
• tools
• linear
• motor

[nodnarbnoob]

exactly why you dont use coolant on a high feed mill

this was a classic case of thermal shock,

[mikenuke]

but there is a coolant running...

[R1pperB]

Μπραβο μεγαλε! :P

[mikenuke]

Ευχαριστω, Δασκαλε! :Ρ

[MRELPARKO]

the problem is that machine is a 2 dollar piece of shit i run a matrix 6 axis and it can turn a 1 metre cube of mild steel into swarf in about 10 mins

[mikenuke]

Everybody has to deal with his shit! Relax man! Halara!

[LongIslandEddie]

I think that the Taiwanese should stick to manufacturing clothing and leave the machine building to the Europeans.

[szym86]

sounds like judgement day

[deepwoodtickles]

If anyone bothers to read, the reason was not coolant, it was trying to cut 3 mm instead of 1 mm, ie a brainfart in the programing, not the fault of the machine being taiwanese either, a good ole american machine would break if programmed wrong.

[Duckyistrippin]

@mikenuke like he said. thats why you DONT run coolant. because cold coolant plus hot bit = kaboom. get it?

[nuthinbuttrubl89]

@mikenuke what he means is you shouldn't be running coolant on a high feed mill. there is too much heat generated in the chip with those types of tools. your best bet is to run them dry or with an air blast. you never run coolant on a high feed mill.

[MyMIXmedia]

its moving rate is to fast

[Baderluck]

@mikenuke he means that is exactly the reason why you should not use coolant:)

[ExtremeDeathman]

@nodnarbnoob

You don't use coolant at HSC, cause the thermal stress is inthe Workpiece, not the cutter itself

[packleader38]

this is classic( i forget to read my cutting plan before i started the system) fail

[TeeWeeQcKsteel]

you can hear the cutter how it is toiling...to much torsional reaction because of the feed

[arthoriusTHEking]

@nodnarbnoob you dont use a coolant BECAUSE of thermal shocks! the tool and the workpiece wouldnt heat up with the right strategy.... only the swarf may be hot!

[MPAH1981]

@junkymagi No one is right and no one is wrong, however you will achieve better roughing at those speeds and feeds without coolant. Removing that much metal, you will keep a majority of the heat in the chip with the right cutting tips. I am a tool maker myself, I've machined many a piece with dry, heavy roughing cuts, then I change my inserts, take a minimal cleanup cut with coolant, measure and go from there. There are a lot of dependencies that determine how you do it. But you know that.