cosmos_275
Hot Rolled
- Joined
- Jun 9, 2015
I've started a job shop in the last few months. I'm not a formally trained machinist, so I'm still learning a lot. Things are going pretty well, but I keep having issues in the corners of deep pockets. I'm getting swirl marks and the machine chatters in the corners.
Today, it's a particularly tough one, so I'm hoping you all might have some advice. The pocket is about 2.5" deep. Corner rad is .3125. The tool I have to finish it is a 3 flute 1/2" carbide end mill with a 3" LOC. Tool holder is a hydraulic. I rough out all the material and leave .004". (6061 is the material)
I thought to do multiple depths, so maybe 15mm deep passes. I plug this into HSM advisor and it says 10k rpm and 200 IPM. This seems crazy, so I knock it down to 4k RPM and 40 IPM. The results were awful, see picture.
Most of the way through, I stop and reprogram taking this time 3mm deep passes. Maybe it helped, but I don't think it's going to get the part to pass.
Can anyone help me on feed/speed for this? Should I really be going 10k RPM? [edit: machine is a 10kRPM Speedio] My instinct tells me to slow down. Thoughts?
Today, it's a particularly tough one, so I'm hoping you all might have some advice. The pocket is about 2.5" deep. Corner rad is .3125. The tool I have to finish it is a 3 flute 1/2" carbide end mill with a 3" LOC. Tool holder is a hydraulic. I rough out all the material and leave .004". (6061 is the material)
I thought to do multiple depths, so maybe 15mm deep passes. I plug this into HSM advisor and it says 10k rpm and 200 IPM. This seems crazy, so I knock it down to 4k RPM and 40 IPM. The results were awful, see picture.
Most of the way through, I stop and reprogram taking this time 3mm deep passes. Maybe it helped, but I don't think it's going to get the part to pass.
Can anyone help me on feed/speed for this? Should I really be going 10k RPM? [edit: machine is a 10kRPM Speedio] My instinct tells me to slow down. Thoughts?