By MetalShavings
2" Shell Mill With 4 HSS TIN Coated Inserts
I might be looking right at the answer and just not seeing it in the software but, I'm not really sure how I'd enter or select this particular type of cutting tool. Filling out all of the other text fields is fairly simple in order to get the Feeds and Speeds I'm looking for but without entering the specific cutting tool correctly it's hard to proceed any further and expect the software to generate the correct cutting calculation. How would you go about entering this type of tool as your selected cutting tool. I'm sure the answer is a simple one; I just don't know what the answer is. I've filled in the pertinent text fields using, 2" as my diameter and four flutes as the number of flutes and HSS Tin coated insers as the material that the cutter is made of but I can tell by looking at the numbers being generated that my mill will bog down if I use them. I tried running it using those ultra low feeds and speeds and it did in fact bog down to a stall. I've also actually tried the trial and error method of tweaking my Feeds and Speeds and I can get it to work but I'd feel more comfortable allowing HSMAdvisor do its work by correctly entering the description of the Shell Mill I'm using. As it is, the numbers I originally generated by entering a 2", 4FL HSS TIN Coated-Inserted end mill are not even close to the numbers I had to tweak it to in order to give me a half way decent cut or surface finish. I know this software will do better because it does it all the time when I use conventional end mills. I just don't think the tool description I'm using is correct for the software to understand. Any suggestions?
MetalShavings
I think it's a Shell=Mill. Some folks refer to them as a Face-Mill. I don't really know the difference. I don't know if it really matters in this instance because whether it's one or the other, I'm still not sure how to correctly enter it as my cutting tool in the appropriate text fields. MetalShavings
Eldar Gerfanov (Admin)
Updated by: Eldar Gerfanov (Admin)January 19, 2018, 9:23 am
MetalShavings
Hi Eldar: I finally figured it out by manually tweaking my feeds and speeds. I checked out the screen shot and noticed that the numbers being generated were for a Haas Mill. Sorry about the lack of information on my part. My machine is just a little Tormach 770. It has no where near the power of the Haas; or just about any other milling machine for that matter. I was using this Shell-Mill or whatever it's called to face off some 1018 steel. Once I dialed in the right feeds and speeds it worked out real well. I think you are correct in that these must be Tin coated carbide inserts; not HSS inserts. In my search for the correct cutting recipe I managed to dull the crap out of the initial cutting tips so once I turned them around to some new tips it seemed to cut like butter with a minimum of trouble. All I wanted to do was to even out the uneven spots on the face of my stock so I used 2400 RPM with 3.0 on a very shallow depth of cut. It worked out perfect. The HSMAdvisor software is excellent for this kind of stuff but there's no substitute for experience, which I don't have enough of. Thanks for your post. Next time I'll make it a point to include a little more information. MetalShavings.