Re: 316 stainless
- From: Steve Walker <res6nlr2@xxxxxxxxxxx>
- Date: Wed, 07 Sep 2005 03:36:54 GMT
I am making the assumption that this is straight turning
And your DOC is a radius.
I would suggest you
switch to a more wear resistant grade like 1025 or 1525. If your edge is actually wearing away and not failing because of a built up edge then switching to a more wear resistant grade should help. Drop your feedrate a little if you switch grades.
I have available CNMG-432 PR grade 4035 CNMG-432 QM grade 4015
The only 1525 available (in house) is a PF geometry.
Also have TCMP?(single sided)-433 UR grade 4025
You might try using a roughing tool for ripping off the main part of the stock and a finishing tool for a light final pass if you not already doing that.
Already doing that, using a CNMG-432 in a S05 grade for finishing. .03 D.O.C.
The feed and speed numbers that are given on the insert package represent a calculated cutting life of 20 minutes of actual cutting time. Sounds like you got pretty close to the theorectical.
If you go through the math and look at the total cost for 128 parts its still better to change the insert more often at the higher feedrate.
I made these assumptions, 10 min = 18 pcs Higher rate (1 used insert edge) 18 min = 18 pcs Slower rate ( 1 used insert edge) You didn't say how many parts were completed at the lower feedrate. Insert edge change 5 min 15 pcs per edge (safe) Insert cost $3.75 per edge ($15 insert cost) Shop rate at $100/Hr
High feedrate comes in at $240 total cost for 128 pcs Low feedrate comes in at $333 total cost for 128 pcs.
The Sandvik tech help is excellent. So lean on these guys. 1-800-726-3845
In a perfect world one edge would do all the parts which is what I always wish for. I hate to babysit a machine to change tools.
That's my problem. It's a gantry fed double spindle Mazak. I need to get 128 pcs before the rougher fails. I may have to go to a tool life grouping, but I hate to because the off shift derelicts (I mean operators) don't understand much but change the roughers every pallet.
a stable running machine myself. It allows me to do my work in parallel which the math here does not take into account. I will take a guy doing two jobs at once over one job at once any day.
Hope this helps
-- Steve Walker res6nlr2@xxxxxxxxxxxxxxxxx (remove wallet to reply) .