Timeline for Inconel drilling with titanium drill bits rpm
Current License: CC BY-SA 4.0
23 events
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| Jan 22, 2023 at 21:42 | comment | added | Bart | Alright, I assume thats no issue then | |
| Jan 22, 2023 at 21:41 | comment | added | DKNguyen | @Bart That's oil. Metal doesn't smoke when it burns. It discolours. | |
| Jan 22, 2023 at 21:30 | comment | added | Bart | I think to fast, smoke was also released from drilling, but I was not sure if that was the burning of oil or the actual burning of Inconel/drill bit | |
| Jan 22, 2023 at 21:25 | comment | added | DKNguyen | @Bart I'd experiment with the feed. 1600RPM vs 600RPM is a significant difference in the linear feed to maintain the same feed per revolution. You may be feeding too slow or too fast when moving from 1600RPM to 600RPM. Hard to say which. I'm guessing too fast if the wheel felt similar in your hands. You may also be experiencing work hardening if you are doing successive drills. It's worth it to see if you aren't able to do it in one go. | |
| Jan 22, 2023 at 21:18 | comment | added | Bart | I have used HSS before, 1.5mm and 2mm, those went good (rpm 1600), and 4.5 but the 4.5mm one was pretty badly condition after 5 holes (of 17 total). used a rpm of 600 on that. | |
| Jan 22, 2023 at 21:07 | comment | added | DKNguyen | @Bart Slow down your SFM I guess to compensate and do the shatter tests...with cheaper HSS drills to start, | |
| Jan 22, 2023 at 21:06 | comment | added | Bart | Only issue is, the Z-axis is very heavy to turn around, with the mill I use, needs me to press the wheel in, and then turn it around, which is quite heavy, so I am afraid the feed will be slow anyway | |
| Jan 22, 2023 at 20:51 | comment | added | DKNguyen | @Bart Calculate the linear feed and practice rotating the hand wheel at the appropriate turns per second to get that feed. But inconsistent feed is probably what will shatter it rather than not getting the feed bang on to your calculated number. Or vibration but vibration is kind of beyond your control. | |
| Jan 22, 2023 at 20:51 | comment | added | DKNguyen | @Bart In that case you might try and go with a carbide tipped drill. I mean...you could try solid carbide and since it is a drill it might fare better than a solid carbide endmill since the force is being applied axially rather than radially. But at 3mm...I think there is still high probability of shattering. Use stub or machine screw length if you can find it. | |
| Jan 22, 2023 at 20:35 | comment | added | Bart | Thanks for the long answer, I do have access to a milling machine, I am not doing this with a press drill or hand drill. The hex drive does fit in the mill. It is not a cnc mill though. I need Inconel because it is heat resistant, it will deal with 500-800° c and high air pressure together. I wanted to use stainless steel, but I have gotten the Inconel sheet from a friend, so I am going to use that. Also to mention, the mill does not have an antomaticly feet on the Z-axis. | |
| Jan 22, 2023 at 0:52 | history | edited | DKNguyen | CC BY-SA 4.0 |
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| Jan 21, 2023 at 22:48 | history | edited | DKNguyen | CC BY-SA 4.0 |
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| Jan 21, 2023 at 20:52 | history | edited | DKNguyen | CC BY-SA 4.0 |
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| Jan 21, 2023 at 20:34 | history | edited | DKNguyen | CC BY-SA 4.0 |
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| Jan 21, 2023 at 20:29 | history | answered | DKNguyen | CC BY-SA 4.0 |