Hey all,
So the good news is my 4 axis gem is working well, making some nice little motorcycle parts already.
I tried to make a set of rearsets today as a pre-production run, and I was horrified at my side surface finish.
Also, a poor edge at the top and bottom of the part.
The tool marks are bad, i'm flooding the poop out of it for chip clearance which appears to be working well.
The tool marks are clearly evident along the sides of the part.
I'm running a 2.2kw AC spindle that runs between 8 and 24000 rpm, so my Feeds and speeds get a bit mental on traditional SFM as far as I can tell.
I was running I was running 2000mm/min at 2mm DOC @ 24000 rpm. I was hoping someone might give me some advice at perhaps a better RPM / doc or feed rate.
The spindle looses any reasonable torque under roughly 8k.
I was using a 6mm 2 flute HSS end mill, which broke eventually, so I switched to my carbide one which didn't...
I guess the ultimate question is should I be running a roughing pass to depth then doing a side finishing cut at full dept and taking off the last 0.25mm or something.
Im also considering using a 12mm diameter 2 flute end mill to try and clean up the surface if you think that will help, but that means a lot more wasted alloy. (That's aussie slang for aluminium- playa's.) 5083 to be exact.
I also haven't ruled out fixture vibration.
Kinda looking for some nuggets here.
Any help is appreciated.
Thanks.
SJ
Good news is the 4th axis is awesome and churning out parts like a boss.
So the good news is my 4 axis gem is working well, making some nice little motorcycle parts already.
I tried to make a set of rearsets today as a pre-production run, and I was horrified at my side surface finish.
Also, a poor edge at the top and bottom of the part.
The tool marks are bad, i'm flooding the poop out of it for chip clearance which appears to be working well.
The tool marks are clearly evident along the sides of the part.
I'm running a 2.2kw AC spindle that runs between 8 and 24000 rpm, so my Feeds and speeds get a bit mental on traditional SFM as far as I can tell.
I was running I was running 2000mm/min at 2mm DOC @ 24000 rpm. I was hoping someone might give me some advice at perhaps a better RPM / doc or feed rate.
The spindle looses any reasonable torque under roughly 8k.
I was using a 6mm 2 flute HSS end mill, which broke eventually, so I switched to my carbide one which didn't...
I guess the ultimate question is should I be running a roughing pass to depth then doing a side finishing cut at full dept and taking off the last 0.25mm or something.
Im also considering using a 12mm diameter 2 flute end mill to try and clean up the surface if you think that will help, but that means a lot more wasted alloy. (That's aussie slang for aluminium- playa's.) 5083 to be exact.
I also haven't ruled out fixture vibration.
Kinda looking for some nuggets here.
Any help is appreciated.
Thanks.
SJ
Good news is the 4th axis is awesome and churning out parts like a boss.