Joethesephy
Plastic
- Joined
- Nov 17, 2021
Hello there,
I am having quite the hard time breaking chips and maintaining tolerances with a part im trying to make. I am using a half inch boring bar with a CCGT 060204 AS IC20 Iscar insert that has a .016 radius. I am trying to bore the inside of a hole from .750 to 1.419, at a z depth of about 2.203, but since i can't get enough space to finish the hole on the side closest me, Im turning upside down. I am currently running from 700-1200 SFM, my spindle speed shouldn't go above 3200. The aluminum 6061 T6 is cutting like long spiral spears, and also getting nested on the part, each one has to be manually removed before finished the sequence. I've tried everything from increasing the spindle, to decreasing it, to increasing the feed rate to about .012" IPM to decreasing it to .005" IPM. I have a lot of luck when the insert is running at 3200, with .0105 IPM and depth of cut is about .050" each time, but im still not breaking chips each and every time AND im getting that really nerve racking "CRUNCHING" nose, and i have to change my insert every 50th peice. (see my part space and Z depth for an idea of how big the part is). Does anyone have any suggestions?
Thanks!
I am having quite the hard time breaking chips and maintaining tolerances with a part im trying to make. I am using a half inch boring bar with a CCGT 060204 AS IC20 Iscar insert that has a .016 radius. I am trying to bore the inside of a hole from .750 to 1.419, at a z depth of about 2.203, but since i can't get enough space to finish the hole on the side closest me, Im turning upside down. I am currently running from 700-1200 SFM, my spindle speed shouldn't go above 3200. The aluminum 6061 T6 is cutting like long spiral spears, and also getting nested on the part, each one has to be manually removed before finished the sequence. I've tried everything from increasing the spindle, to decreasing it, to increasing the feed rate to about .012" IPM to decreasing it to .005" IPM. I have a lot of luck when the insert is running at 3200, with .0105 IPM and depth of cut is about .050" each time, but im still not breaking chips each and every time AND im getting that really nerve racking "CRUNCHING" nose, and i have to change my insert every 50th peice. (see my part space and Z depth for an idea of how big the part is). Does anyone have any suggestions?
Thanks!
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