Milling time in CS

[jimboux]

Hi,

I'm looking to come up with a machining time estimate to mill some CS Plate (A516-70). I need to face/shoulder mill off a "1/4 moon" shape of about 104 sq. in. by 1" deep. The only shoulder milling is around a 5" radius for about 270 degrees. The rest is all face mill. If it make it easier for estimating, it the equivalent to a diameter of 11.5" fully milled down 1". This would be done on an Okuma Milliac 561V, I'm not sure of the cutter type but I think it's Sandvik Coromill 390, exact tooling is unknown. I'm not looking for an exact time, just one that will let me know if someone is blowing smoke. Thanks much.

 

[MikeHalloran]

Sandvik can probably give you a Metal Removal Rate in volume per unit time for a given insert cutting a given alloy, or at least starting parameters.

Mike Halloran
Pembroke Pines, FL, USA

 

[jimboux]

Thanks, I'll give that a try

 

[racookpe1978]

Hmmmn. Show a sketch of the "half-moon" - and pay particular attention to the corner details and fillets and edges. You may find you'll spend a significant amount of time lost trying to do "the last 5%" of the job. Or, by getting a cutter and insert with the proper radius in the first tool, you'll see that extra time vanish.

 

[jimboux]

Thanks - I used Mike's suggestion and talked to Sandvik. We have to get a new tool and inserts but the time is down to 16 minutes!