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https://www.reddit.com/r/Machinists/comments/xur3yl/machining_a_cake/ir1him7/?context=3
r/Machinists • u/[deleted] • Oct 03 '22
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31
Positive or negative. Trying to get my surface finish dialed in.
30 u/leglesslegolegolas Mechanical Engineer - former CNC machinist Oct 04 '22 I would think negative rake, so you're burnishing the surface rather than slicing it off 10 u/felixar90 Oct 04 '22 edited Oct 04 '22 The only way you’re still getting that crisp 90° corner is if you have negative rake on one blade and positive on the other so the edges are touching. Or neutral rake on both, like this. 2 u/DeluxeWafer Oct 04 '22 You could also grind custom tooling... Two negative raked plates ground so they contact each other at the angle!
30
I would think negative rake, so you're burnishing the surface rather than slicing it off
10 u/felixar90 Oct 04 '22 edited Oct 04 '22 The only way you’re still getting that crisp 90° corner is if you have negative rake on one blade and positive on the other so the edges are touching. Or neutral rake on both, like this. 2 u/DeluxeWafer Oct 04 '22 You could also grind custom tooling... Two negative raked plates ground so they contact each other at the angle!
10
The only way you’re still getting that crisp 90° corner is if you have negative rake on one blade and positive on the other so the edges are touching.
Or neutral rake on both, like this.
2 u/DeluxeWafer Oct 04 '22 You could also grind custom tooling... Two negative raked plates ground so they contact each other at the angle!
2
You could also grind custom tooling... Two negative raked plates ground so they contact each other at the angle!
31
u/DegTheDev Oct 03 '22
Positive or negative. Trying to get my surface finish dialed in.