Ball Nose End Mills & Effective Diameter: In The Loupe TV Short
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- เผยแพร่เมื่อ 3 ต.ค. 2024
- In this episode of In the Loupe TV, take a deeper dive into ball nose end mills and surface footage. In the previous episode, Don explained what scallop height is and how to manipulate it so you can achieve the best finish possible with a Ball Nose End Mill. In this episode, join In The Loupe TV’s “Cutting Tool Counselor,” Don Grandt, as he explains how you can utilize effective diameter when programming, so you can run your tooling faster and smarter.
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Keep on making em
This can be remedied on a 5 axis machine. If your surfacing with a ball and have the opportunity to increase your lead/tilt angle in your CAM software you can essentially do a .005 finish pass and use close to your full effective diameter.
Obviously dependent on part geomety / clearances
You are spot on. We are going to get into 5 axis soon. But when you tilt you have a greater diameter to use and therefore can utilize the benefits of a ball. Great comment!! Ctc
Don..
Great as usual.. Fine finish with effective dia.. Superb and simple explanation and very easy to understand..
And One doubt..
What about the cutting speed, when finishing very very less material with the tip of the ball nose in 3 axis machine..? At the tip dia is almost Zero..
You are correct. Almost like dragging the tip along the material. There are ways to combat some of that. We are going to discuss a tilt and effective teeth in the next episode. As always thanks for watching. Ctc
Thank u so much don..
And We can tilt with 5 axis..
My question is concerned with 3 axis..
Waiting eagerly for your next episodes..
Thanks in advance.. 🙏
Nice video. But what happens when you cut 6061-T6 aluminum and your Haas machine has 12,000 RPM? It is impossible to achieve the RPM for a cutter less than 1/4 inch in diameter because you need alot of SFM (1000). And now, if you are machining a surface with a ball nose of 1/4in of diameter. The efective diameter is useless. In this case I assume that I use all the RPM that my machine has. but do I have to reduce the IPT?
Here is the thing with aluminum and SFM/RPM. The reason we can run the SFM up so high is because of the properties of that material to form a chip and not put any heat at the cutting edge. Just because we can run 1000-2500 SFM does not mean it will run just as good at 300-600 SFM.. ( obviously Slower) So yes you are bound by the limitations of your machines capability with aluminum. But your Chip load is calculated by the RPM you use. So say you want a .003 IPT for a 1/4 tool. Just Take your 12k ( MAX) and multiply 12000x.003x Flutes of endmill and get IPM. Use the scale for any RPM to keep chip load constant. This will ensure that there is no extra stress on your tool. And yes it is exaggerated by effective diameter. Hope this helps and great question! ctc
Then run 12000 rpm
Thank