series of long narrow slots in copper

Started by neurosis, June 08, 2021, 06:56 AM

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neurosis

June 08, 2021, 06:56 AM Last Edit: December 31, 1969, 04:00 PM by Guest
We're about to have to put a series of long narrow slots in some 110 copper plates.  

The 'management' would like to do this on a cnc machine.  The slots are pretty narrow.  .03 wide, 3.3 long with a .03 spacing between and there are approx 30 per part.  Does anyone know if they possible make a modular type cutter that you could machine multiple slots at once in these things?  

I should probably add that the max diameter of the cutter is 1.5".



https://i.postimg.cc/90sZDCw8/ts.png">
I'll go back to being a conservative, when conservatives go back to being conservative.

gcode

#1
June 08, 2021, 07:19 AM Last Edit: December 31, 1969, 04:00 PM by Guest
I've stacked up small carbide slitting saws on an arbor with spacers between the saws many times
You may  have to make the spaces a couple of thou wider than the desired slot spacing because
the slitting saws will be hollow ground (thinner in the middle than at the teeth)

Here's Johnny!

#2
June 08, 2021, 07:25 AM Last Edit: December 31, 1969, 04:00 PM by Guest
Slitting saws are the best option IMHO.

neurosis

#3
June 08, 2021, 07:29 AM Last Edit: December 31, 1969, 04:00 PM by Guest
Quote from: JFord post_id=12120 time=1623162325 user_id=140Slitting saws are the best option IMHO.


I agree. What I'm hoping, is that I can find something stackable so we can do multiple slots at once. There are a LOT of these things and if we have to machine the slots one at a time it's going to take a while.
I'll go back to being a conservative, when conservatives go back to being conservative.

gcode

#4
June 08, 2021, 08:23 AM Last Edit: December 31, 1969, 04:00 PM by Guest
RobbJack is your friend for work like this

https://robbjack.com/products/carbide-slitting-saws/">https://robbjack.com/products/carbide-slitting-saws/

neurosis

#5
June 08, 2021, 08:50 AM Last Edit: December 31, 1969, 04:00 PM by Guest
Those look pretty nice. I'm going to have to bookmark that page.
I'll go back to being a conservative, when conservatives go back to being conservative.

RobertELee

#6
June 08, 2021, 11:20 AM Last Edit: December 31, 1969, 04:00 PM by Guest
Anybody else try to grab the screenshot and rotate it?

No....?

Just me....?

 :help:


BTW that looks sucky sucky...
Hopefully your tolerances give you some wiggle room.

I'd probably make up my own arbor to stack ground spacers between with appropriate sized slitters.

neurosis

#7
June 08, 2021, 11:33 AM Last Edit: December 31, 1969, 04:00 PM by Guest
I did a time study and it wouldn't take 'too' much longer if we had to do them one at a time.  

It would be nice if there weren't 29 slots. That causes a stacking issue.  lol. Prime numbers suck!  :realmad:
I'll go back to being a conservative, when conservatives go back to being conservative.

crazy^millman

#8
June 08, 2021, 02:16 PM Last Edit: December 31, 1969, 04:00 PM by Guest
https://3hytkr1l37jl3m61e5w2fznf-wpengine.netdna-ssl.com/wp-content/uploads/2019/09/UH-3.jpg">

Here is what we use to do these on when we could use bigger saws. I have stacked 60 1/32 blades with .0305 shim on one before and cut some 1/2" deep slots. Took about 6 hours of cutting, but back then we would just hit the feed button and come back every hour and clean out chips.
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