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I'm having trouble wrapping my remaining brain cells around this one.
How does it do that?
- posted
10 years ago
I'm having trouble wrapping my remaining brain cells around this one.
How does it do that?
Drill square holes in metal?
I'm having trouble wrapping my remaining brain cells around this one.
How does it do that?
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- posted
10 years ago
I drill triangular holes.
- posted
10 years ago
Ok, I'll be your Huckleberry.
How?
How?
- posted
10 years ago
I don't know why, it just happens.
Your video link is outside my reach, but maybe the drill is really a broach?
Your video link is outside my reach, but maybe the drill is really a broach?
- posted
10 years ago
- posted
10 years ago
We've all seen triangular holes from
standard jobber bits.
The bit flexes a little while drilling
causing the hole to resemble a Reuleaux triangle.
--Winston
--Winston
- posted
10 years ago
I don't think so....
- posted
10 years ago
From the Reuleaux Triangle link you posted,
"Because it can be rotated inside a square, as illustrated above, it is
the basis for the Harry Watt square drill bit."
- posted
10 years ago
yeahbut...
I still think it implies a gearbox inside the drill bit.
I still think it implies a gearbox inside the drill bit.
- posted
10 years ago
I don't think that's the deal here, Winston.
It's making nice square holes, albeit with radiused corners.
the few brain cells I have left are complaining madly about that.
the few brain cells I have left are complaining madly about that.
- posted
10 years ago
A 3-tooth gearwheel on the drill chuck, engaging the inside of a
stationary (fixed) 4-tooth inside gear.
The drill motor in this instance only makes the drill "orbit"--the motor does not spin the drill directly, the gear engagement does that.
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Now MY question is,,,,, can you drill different-sized holes with one of these setups? Or is each head just fixed to use one bit, to make one size?,,,,
If it was adjustable at all, I'd think the range would need to be kept pretty small. Like maybe 1/4-inch to 1/2-inch?
The drill motor in this instance only makes the drill "orbit"--the motor does not spin the drill directly, the gear engagement does that.
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Now MY question is,,,,, can you drill different-sized holes with one of these setups? Or is each head just fixed to use one bit, to make one size?,,,,
If it was adjustable at all, I'd think the range would need to be kept pretty small. Like maybe 1/4-inch to 1/2-inch?
- posted
10 years ago
-Unless the whole thing is not just CNC, with servos controlling the
motions. Which I think would be more likely with a modern setup. That
way you could drill holes with any number of corners you wanted, down to
three corners....
- posted
10 years ago
Check these out too:
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- posted
10 years ago
Watch the collet area REAL close. Notice that it has LOT of motion.
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shows how it works.- posted
10 years ago
(...)
I was addressing your 'Huckleberry' question about the triangular holes. The two are related. The cutters in both cases oscillate as well as rotate. In the 'jobber drill' instance, the oscillation occurs as the long, spindly bit ricochets around the center, bouncing off the walls of the hole.
The square cutter does have a gearbox to carefully control the additional displacement of the cutter to create a square hole. See how:
I was addressing your 'Huckleberry' question about the triangular holes. The two are related. The cutters in both cases oscillate as well as rotate. In the 'jobber drill' instance, the oscillation occurs as the long, spindly bit ricochets around the center, bouncing off the walls of the hole.
The square cutter does have a gearbox to carefully control the additional displacement of the cutter to create a square hole. See how:
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--Winston- posted
10 years ago
Doesn't Mazda use those?
-- Worry is a misuse of imagination. -- Dan Zadra
-- Worry is a misuse of imagination. -- Dan Zadra
- posted
10 years ago
I think you are stretching it by trying to call a cam inside a box guide a
"gear box". :)
This link is interesting:
The original link on this thread seems to be cutting corners that are more square than a standard Harry James Watts Reuleaux triangle drill.
If you look at the drill at the opening of the video it looks far more triangular with flatter sides and truncated corners so maybe they figured out yet another cam shape that does a better job? The noise it makes when drilling however makes it sound like it's a box cam flapping around so it doesn't look like they used special gears to do the work.
This link is interesting:
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It shows that with a slightly different shape, you can make it trace a true
square instead of one with rounded corners. But the drawback, is that only
one point is tracing the square, instead of three, so you could only have
one cutting edge using that technique.The original link on this thread seems to be cutting corners that are more square than a standard Harry James Watts Reuleaux triangle drill.
If you look at the drill at the opening of the video it looks far more triangular with flatter sides and truncated corners so maybe they figured out yet another cam shape that does a better job? The noise it makes when drilling however makes it sound like it's a box cam flapping around so it doesn't look like they used special gears to do the work.
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- posted
10 years ago
(...)
Should I have said 'gear in a box'? :)
Yes but still less time in handwork to sharpen up the corners if that is necessary.
Very cool. Thanks!
--Winston
Should I have said 'gear in a box'? :)
Yes but still less time in handwork to sharpen up the corners if that is necessary.
Very cool. Thanks!
--Winston