Fly cutter instead of surface grinder ? And other things.

Kosa_PL

Kosa_PL

Joined
Aug 25, 2013
Messages
1,220
Hello,

Can I use Fly-Cutter with carbide inserts instead of Surface grinder ?
Don't have space to place grinder in workshop :(

Now I have ZX7045 milling maschine and thinking to buy for this a 300m x 150mm magnetic chuck with 140Nm force.
To work max with 290mm blades, 2,5-5mm thick.
0,05mm / 0,2mm cutting deph.

Fly cutter with 11* angle, S12M-SCLCL09 Boring bar + CCMT09T304-HF YBC252 carbide inserts.

If I can use this for surface milling, this can make my work on folders faster :)

S12M-SCLCL09.jpg



Just finished, but shank need to be turned from 25mm to 20mm to get this in the ER32 collet.






Best Regards,
Konrad
 
Last edited:
the finish wont be great but your parts will be flat. you could also use angle grinder wheels(the thick ones) in your mill.
 
With this inserts at 955 RPM , radius 150mm, and fn| 0.28mm/rev from that what I know I can obtain almost mirror finish.
But this need a nice trammed mill. ( tramming ZX7045 is nightmare...)

This parameters give me 2.34Mc|Nm , 0.23 Pmot|KW process of milling 300mm blade would take 1 minute 7 seconds.
 
the finish will be shiny, but it will be a machine finish. on folders without bearings you will still need to sand the pivot pin area.
 
Even after surface grinder knife need to be sanded.

For me the goal is to get this super flat, and different thickness.
And get rid of brute de mill, and technology layer from uPowder steels.
 
it will work for that purpose. you will want to get under the mill scale on the first pass to save on inserts, and as you know tram will be important.
 
Btw. to not make another topic.

Next Spring I will be building new workshop :D
Then I will have moreee space for tools.
I have some questions.

I was thinking about to get MAZAK Vertical Center Primos 400S for leasing to make more better knives and folders.
But, then this will be production knives in many eyes.

As a 1man company just a knifemaker should I go more into handmaking ? ( and only CNC will be to watercut out blanks [ better material use] )

Then I will go into Viking 3MA universal milling machine, Łucznik SPH-1 surface grinder, TSB-20 Lathe or Optimum OPTIturn TU 2406V.
Plus: 2 heavy grinders, 1 grinder only to sharpening knives on wet trizact belts. Stuff for putting and baking cerakote.
Now also I building TWO knife kilns 150x100x400mm chamber 3kW 240V 1 phase power with LUMEL RE72 controllers.

And lot of small tools.
 
I mill my flats all the time. You'll find there is a minimum cut needed to cut and not rub. You may find yourself feeding more than you want to prevent BUE and work hardening and subsequent warping of your work piece. It can be done, but you'll find it's not trivial to do well.


edit to add:

12_zpse2946521.jpg


14_zpsfa6e68f2.jpg


^ that's about as good as I can get it. It's not ground, but it's not bad either. It's perfect if you're just going to tumble anyway. Otherwise, you'll need to hand sand.
 
Thank you Nathen for a reply with example :)

Mostly I doing Stonewash, Acid Stonewash, 2tone, finish.
And later I will add Cerakote coating for my knives.
Knives also mostly are machine satined.
But to do this ok I need flats to be flat, and also I need to remove technological layer from M390 etc.

Now I also thinking about to back to hand cutting blanks out. And on water jet I will just have cut out a flat stripes. and I will mark all stuf with steel "stencils" cut out by water, and also good positioning of holes.

Milling flats will be also ok for folders?
 
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