With ball end mills there is zero cutting speed in the centre with little chip clearance. Cutting this way gives a constant cutting speed on the whole profile. The feed rate was 3500 mm min and could be much faster which may be comparable to live tooling. There is only 1 chip per pass, 32 chips instead of tens of thousands. It is clean, quick, quiet and saves energy by not spinning the tool. Maybe not a perfect solution for everybody.
@@machinists-shortcuts Only a small portion of the cutting in this operation occurs in the middle of the tool. It's not really an issue, but the much higher and more efficient operation of live tooling verses single point tooling is significant. You're basically using your mill as a shaper. While this might be necessary for some internal operations, it's painfully slow for cutting external features. It also imposes greater loads on the mill which will increase deflection and wear. You've developed a solution for a problem that doesn't exist.
@EDesigns_FL Thanks for the reply. Generally you are correct, especially with face milling vs shaping a flat face. In this case the feed was 3500mm/min although I could have easily used the machines max feed of 5080mm/min. Chip to chip @87 secs no too bad. For comparison use it has a 6000 rpm spindle. Could you please post a comparison feedrate with a 2 flute ball nose endmill of any size you like using my machine limits. It would be interesting to compare the two mmr's to see how much slower this method is. FYI the diameter of the insert was 6.35mm so maybe this could also be the diameter of the ball nose cutter to replicate the cutting steps & finish. This is not portrayed as a replacement technique or as a better one, it is for information only & may be useful in certain situations. I have several CNC shaping videos including internal keyways and knurling. There's one titled CNC profile shaping that is probably a better example of the versatility of the technique. Here is the link - th-cam.com/video/lwd4GXhXmjw/w-d-xo.htmlsi=AWMrLZT-78F_fBbO The machine has overload sensors so any excess strain stops the machine therefore protecting it.
I entered a 1/4" ball nose end mill into the FS wizard app and it calculated the ideal feedrate at 737mm/min with my max spindle speed. This is almost 5x slower than the video method at 3500mm/min which is still well under the ideal surface speed. Here is a link to the results - app.fswizard.com/?share=%5B0.25,0.625,0.125,0.25,2,0.5,30,90,5,24,1,%22UNC%22,%221/4-20%22,null,null,0,0.019685,0.134666,null,null,null,64.442715,0.061438,100,100,6000,0,1,0,0,13%5D
![เปิดบ้าน เปิด Supercar อั๋นโอกิ เคยเอา rolls Royce เเลกพระ องค์ละ 100 ล้าน l [Nickynachat]](http://i.ytimg.com/vi/FeGwJwXauZ0/mqdefault.jpg)
You invented the CNC shaper machine!
That tool holding solution is hilarious
Glad you liked it. I was surprised it worked but still risked it for the craic.
Why didn't you just use a ball endmill?
With ball end mills there is zero cutting speed in the centre with little chip clearance. Cutting this way gives a constant cutting speed on the whole profile. The feed rate was 3500 mm min and could be much faster which may be comparable to live tooling. There is only 1 chip per pass, 32 chips instead of tens of thousands. It is clean, quick, quiet and saves energy by not spinning the tool. Maybe not a perfect solution for everybody.
@@machinists-shortcuts Only a small portion of the cutting in this operation occurs in the middle of the tool. It's not really an issue, but the much higher and more efficient operation of live tooling verses single point tooling is significant. You're basically using your mill as a shaper. While this might be necessary for some internal operations, it's painfully slow for cutting external features. It also imposes greater loads on the mill which will increase deflection and wear. You've developed a solution for a problem that doesn't exist.
@EDesigns_FL Thanks for the reply. Generally you are correct, especially with face milling vs shaping a flat face.
In this case the feed was 3500mm/min although I could have easily used the machines max feed of 5080mm/min. Chip to chip @87 secs no too bad. For comparison use it has a 6000 rpm spindle.
Could you please post a comparison feedrate with a 2 flute ball nose endmill of any size you like using my machine limits. It would be interesting to compare the two mmr's to see how much slower this method is. FYI the diameter of the insert was 6.35mm so maybe this could also be the diameter of the ball nose cutter to replicate the cutting steps & finish.
This is not portrayed as a replacement technique or as a better one, it is for information only & may be useful in certain situations. I have several CNC shaping videos including internal keyways and knurling. There's one titled CNC profile shaping that is probably a better example of the versatility of the technique.
Here is the link - th-cam.com/video/lwd4GXhXmjw/w-d-xo.htmlsi=AWMrLZT-78F_fBbO
The machine has overload sensors so any excess strain stops the machine therefore protecting it.
There is always several ways to do things you know ? This is just one of them and it is pretty cool
I entered a 1/4" ball nose end mill into the FS wizard app and it calculated the ideal feedrate at 737mm/min with my max spindle speed. This is almost 5x slower than the video method at 3500mm/min which is still well under the ideal surface speed.
Here is a link to the results - app.fswizard.com/?share=%5B0.25,0.625,0.125,0.25,2,0.5,30,90,5,24,1,%22UNC%22,%221/4-20%22,null,null,0,0.019685,0.134666,null,null,null,64.442715,0.061438,100,100,6000,0,1,0,0,13%5D