Gear Hobbing Attachment (milling machine) Part 2
ฝัง
- เผยแพร่เมื่อ 4 ก.ค. 2021
- Finishing the build of the gear hobbing spindle and experimenting with what it can do.
00:20 Quick recap
00:46 Keying pulley and spindle
01:49 Nut
03:28 Fitting bearings and assembling spindle
06:13 Stepper motor bracket
06:30 Adding graduations
07:27 Etching numbers (electro-chemical etching)
09:18 Painting and final assembly
11:22 Spindle control/division
--
14:21 Cutting spur gears
18:07 Cutting helical gears
19:10 BONUS Gear skiving internal helical gears
Music used in this video: 'Industry' by 'E-Shine' eshine.bandcamp.com/music - วิทยาศาสตร์และเทคโนโลยี
Thank You for not only providing a veritable course in metal working, but for taking the time to document it in such a professional manner. Best Gear Video Ever!
All I can say mate is, thank you for your beautiful expertise. You are truly a craftsman. Cheers.
That nut design is the smartest thing I've seen. Brilliant! Self locking and non slipping, brilliant!
You very obviously can't hear what I'm thinking because I was completely in awe of that plastic gear. To then do it in steel is mindblowing! I hope I get the chance to play around with stuff like this one day. I'm allowed to play around with my mentor's mini lathe and I'm planning to get myself a micro lathe (like a clockmaker's lathe) when I find one in good condition. It's a long road between that and gear hobbing but that ain't gonna stop me!
I’ve been in the trade for 40 years.
I’m impressed by your gear cutting.
And your electronic gear indexing
Thanks very much! 😁
@@AndysMachines can you do splines this way too? or that's broaching altogether?
Yes you can hob splines, there are special hobs for doing this. internal splines need to be cut with another method though (broaching, shaping, skiving).
if there is ever an apocalypses machinists will rebuild the world.
Well, yeah, they built the current one.
they built the one where living in now
Ya that will work great with no power to run their lathe and mill.
@@matthewmoilanen2413 we used to run those off giant pulleys run by water wheels
@@matthewmoilanen2413 Think there are enough other tech's around to sort them some power.
The amount of engineering steps to making gears is intense. I have a new appreciation of the little things that makes life easy.
🤖🍖me2
Hi Andy
How to sync the index head with machine spindle?
Is it possible to use closed loop stepper motor with harmonic drive for hobbing instead of belt drive?
Thanks in advance.
A stunning presentation by every measure. Excellent close-up photography with perfect lighting. Very well thought out and clear dialog...no "um...er...ahh" to waste time. Superb!!
It was a huge pleasure to watch someone did a project from A to Z without any default. It shows lot of things: Solid theoretical background decades experiences in manufacturing and perseverance accumulated behind this excellent realisation. Thanks for sharing every details.
I bet it’s very satisfying to be able to produce such a fine instrument with hobby machines.
What are you, some sort of genius?
I’m now a subscriber.
Well done sir.
I'm only here to just watch, but I got to say, TH-cam was made for people like you, which I can't say for many others.
Great Video 👍🏼👍🏼👍🏼
Genius, you just explained how gear hobbling works. I watched your video 5 times, now I understood how hobbling cutter works. Thank you !
Hobbing ... not hobbling...
😎👍☘🍺
It's one thing to make a part and the entirely another thing to instrument it and bring the whole thing to life.
I many times people only know the part that they know it can take four or five people to build a simple machine only years of experience can make this possible if you're willing to step out of your comfort zone.
The builder of the machine that lets you build endlessly is the True genius, and you Sir are truly gifted! Thank you so much for this. Now I must build my own mill. 😁😁😁😁😁 5 Stars!!!
Very nice work! I used to cut gears using hobs way back, brings back memories! So awesome to see what has mostly been an industrial process done with specialized machines attainable for the home shop! Thank you so much for sharing sir! ❤️
Ok, had to subscribe. I’m a professional mechanical engineer, and I have taught the machine design course at my local university, which includes a couple chapters on gears. But your explanation of how gear hobbing works (including a perfect animated illustration) was masterful and eye-opening. And how (relatively) simply a hobbing setup can be made…. wow. This just went on my last of projects for when I can finally build my garage shop.
wow - such an amazing tool! I especially enjoyed your attention to the mechanical fit and alignment of all the parts, use of locating features, etc. Turely impressive work in every aspect. This is definitely in my bucket list of projects now. :)
I was in awe watching your videos! Such precision made look so easy. My mind is boggled!
Highly impressed.
Thank you for sharing your considerable skills and knowledge.
That's beautiful work. My father was a machinist and fabricator, this is like watching him work again.
Great fun 😎
I have watched thousands of machining videos and this was without any doubt the most interesting I have ever seen
I cant wait to explore the rest of your channel
You have inspired me to get back out in my own shed and dust off my own Colechester Student
Thank you so much
Bloody brilliant.
When you need something, how do I do it with whats on hand.
This Guy takes it to the next level.
Best explanation of gear hobbing that I've seen yet. And also thanks for demystifying cutting helicals. I always thought there was a lot more magic to it than just "tip the gear, then do the same thing" :P
There's a little more to helicals than 'just tip the gear', the calculations for correct pitch circle diameter are a bit more complex, but nothing too scary. Now hypoid bevel gears, they mystify me!
@@AndysMachines Haha, fair enough :P Still less magic than I originally imagined.
what a great display of ingenuity, outstanding work!! Louis
Thanks for this Mr Andy! Very inspiring, lots of interesting solutions. And a huge amount of fine work on your part.
I was blown away when you started skiving on the damn thing. SUBBED!
I have been waiting so much for this final video to come out. Absolutely brilliant bit of kit you have put together. I specifically liked the pre-tension nut for the angle bearings.
What would also be great to see is these gears in use. For example to make a planetary set of gears and then run it at relatively high speed.
Yes, this hobbing attachment (and gears made with it) will certainly feature in future videos and I can think of a couple of applications for planetary gearboxes. It may be a while before I get round to it though (never enough time!)
@@AndysMachines Well done on this overall.
It would be great if you could do a more in depth take on the spindle. A lot of people don't know what it takes to make a shaft rotate with high accuracy and very low run out. There are more than a few people doing their own CNC mills and lathes here on YT and its obvious to me they don't understand the concept of mounting a shaft that will maintain its precision over time.
I don't know your background but its more than just precision machining. That part of the first vid when you checked the run out on the collet mount was scary for how accurate it was. The fact you know how to make and install a quadrature encoders is super impressive and I wished more people would pay attention to that concept.
I've done 30+ years of automation and very few people are even taught what you know to design and build. Robin Renzetti is one of the very few TH-camrs I have seen who knows how to design and build high precision hardware. I have worked with precision tool makers and instrument makers and they have a different mindset to normal machinists.
About the only thing I would have done differently would have been to use a servo instead of a stepper but that's my bias from robotics and I know how to use them.
@@AndysMachines You're absolutely right about the mechanical part. No amount of software can ever truly fix a bad mechanical setup. It might improve what ahs been built but it can never solve. That's a very hard lesson I see way too many mechanical engineers NOT EVER LEARN.
I hope Robin is back doing regular vids soon. I really want to see how that hyper precision indexer turns out.
Its not that dissimilar to what you did. Its a very simple system capturing a rotating shaft in fixture to rotate accurately. Its just he's taken it to a whole different level of precision.
impressive! looking forward to watching a stepper motor electric control system building video for details. thank you so much
Another outstanding project, superbly done-entertaining and educational-Thank You Very Much, excellent ✅👍
Time taken to cut this gear 2 minutes, time taken to know how to make and use these tools, a lifetime
Very very impressive. I've learnt a lot from your gear cutting videos. Thanks very much for taking the time to put them together and explain all the little details in such an understandable manner. Mart in Solihull.
Excellent two part series. I learned a ton! Thank you
thank you very much for sharing this piece of art with us!
Wow you have done some very nice work sir.
Thank you for this incredible video. I am going to have to get a lathe now, as I want to try this! Looking forward to seeing more.
Magnificent job and magnificent video. I saw a great commitment and a great skill, I have a lot to learn from people like you
Thanks. Ambivalence in decision making on mill upgrade has now been overcome!
Very interesting build, thank you. Skiving was a new one to me.
This was a fantastic build. I’m inspired ! Please may we have more !
Amazing work Andy!
This is outstanding!
I love how you put the slot for the key right through the part number.
But hey, I missed the important number (no. teeth)!
Incredible skills and superb editing! So interesting!
beautiful craftsmanship.
Awesome project, and very inspiring to DIY'ers. Thanks for posting this video!
What a cool project, really impressing! I like the etching technique. And what a cool idea to use this assembly for skiving internal gears. Great content. Thanks for sharing.
Thanks! I use this etching technique quite a lot on things like control panels, this wasn't actually a particularly good example, there were a lot of scratches left on the milled area by the endmill I used which spoiled the look a bit.
@@AndysMachines Anyway, the technique is ingenious :)!
@@AndysMachines Where do you get your electroetch masks, please ?
OK. I saw the answer lower down. It sounds like I should visit my local advertising sign maker as I´m not likely to get enough use out of a dedicated vinyl cutter. I´m familiar with electroetching and used to have an electroetch machine where the supplier did masks, too, but it is 40 years ago. Thank you for reminding me of it !
@@peterellis6556 You could use the same technique as what hobbyists use to make their own printed circuit boards. In order to make those they coat copper clad PCB's with UV sentitive photoresist, print a negative of their design on overhead transparency sheets, place the sheet over the photoresist clad PCB and then expose it with UV light from some UV LEDs or UV tubes. After exposing it the required amount of time the board is dunked into a soda or weak lye solution to dissolve the bits of photoresist which were hidden behind the black ink of the printed design on the transparency sheets and as result didn't polymerise by the UV, and then the plate is removed from the solution and rinsed with some tap or preferably demineralised water. Then the board is placed in a tub with etchant solution (ferric chloride, sodium/potassium persulphate, or diluted hydrochlorid acid with a small amount of dilute hydrogen peroxide) to etch away the exposed bits of copper of the PCB, and hey presto, you have a developed PCB with all the copper traces and pads just where you want them. The same technique can be used with other metals as well, including steel and I would assume aluminium. And its probably a fair bit cheaper than the vinyl method.
Great design, very neat and compact
This has been fantastic to watch. Thank you!
Great video! That answers a lot of questions I've always had about hobbing and this sort of coordinated moves that's necessary to make it work. I love the way you're able to get that ring gear cut. It seems that that's broaching it though, rather than actually milling it.
Yes, the cut is taken in the downward direction by the relative movement of part and cutter, it's similar to rotary broaching.
from my humble point of view, that was fantastic
Love the slomo, it's relaxing
It's nice to look at the work of the Master! Especially without using the archaic imperial measurement system.
Careful they still use whitworth fasteners 55 degree thread angle unless you're at or under a quarter inch 54 and 1/2 included angle.
I noticed he uses metric good for him. You know there five different metric standards.
I made parts to mount a Garrett turbine TFE 731 high bypass engine on a pair of Desalt Falcon and Condor Business jets to get FAA certification in flight by removing the one of the existing engines replacing it with a Garrett model as most modern twin engine aircraft are certified to fly with a single engine it saves hundreds of thousands of dollars testing etc we did all the engineering made all the parts even installed everything, next thing you know I'm getting a call from an engineer desperately wanting to know what the hell I did wrong they were trying to add something the ISO metric bolts they had would not fit.
I told him I used the French standard he was puzzled it's a French aircraft dude I wrote it down on the blueprints if he would have bothered to read them.
Here in the US we must deal with all of it I've made many an adapter to go from certain British taper pipe sizes to American taper pipe. On regular Straight pipe most of their threads are off by one pitch we add extra pipe snot and use a bigger wrench
On one project because somebody cheaped out on the gearboxes for the Central Arizona Project bringing water from the Colorado to Phoenix the size of pipe plugs used doesn't exist here like not even close.
Some of the Indians didn't feel they got their fair share of water so they were loading the gearboxes with gravel, the solution was to put locking pipe caps on the gearboxes right up until they couldn't find pipe nipples that would fit to screw said locking pipe caps onto priceless.
More like about 60 adapters at around $50 each.
Not sure why they would call it imperial that's what they should call the British whitworth system.
Here in America we use inches which have nothing to do with a damn thing.
Why you got me not divisible by anything makes computers insane only thing worse is when people try to convert metric to inches when they're trying to hold tenths of a thousands of an inch on CNC machines.
The control turns the motors that turn the screws.... you guessed it! Metric Screws so you end up with a double error someone asked me why don't they make inch ball screws Id like to smack them with a ball peen hammer idiots.
What would you use for a conversion factor how many places would you take that out and still be wrong unbelievable.
Some of the bolt patterns on jet engines make me crazy.
I use the dividing head with a plate you still have to put a fudge Factor in by adding or subtracting a hole in The mask plate, and if you're smart you'll break that up by some amount equally which is impossible I always try to break them four if not five times depending on the tolerance typically as I cross an axis if you looked at it that way even though I'm turning it radially.
What division plate would you use for 109 holes on a 762mm diameter on a Bridgeport that only has 225mm of travel in Y.
Be careful one hole at 12:00 is offset from it's normal calculated position, only in the x-axis by 1.25 millimeter now imagine if you look at the part the first hole at the top now at 9:00 your left hand is now zero you're at zero because you're using the x-axis as your radius adjustment Y axis remains at zero except for this first hole the offset is made in Y.
you get .002 inch tru position tolerance, regardless of feature size how many tenths of 1/1000 inches can you be off and maintain this position tolerance?
How many Arabs can you fit in a tent-h anyway, it really depends on how big the Tent is.
I live in microns thank you.
Sorry bad joke I got a better one though
Your setting up a machine you make the first part and send it to inspection.
The inspector comes out and says you need to move over a couple Mills, that way.
So you unbolt everything move down the line 2 machines and begin to set your parts up again there.
Soon he comes back to check on things and says, What the hell are you doing?
@@chauvinemmons It must be frustrating to work on vehicles of projects that cost upwards of millions, only for it not to work, or even worse, utterly get destroyed because someone used the wrong type of bolt. Hopefully one day the last few countries will join the rest of the world in using the metric system and nothing else, it would save a lot of people a lot of headaches and money the world over...
Amazing work! Love everything you're doing, incredibly impressive, keep it up!
Thanks for sharing this valuable information, love to watch this video. Great job.
Amazing Job!!
Congratulations 👏👏
Thank you so much for devoting your time to making this "Absolutely Outstanding Video" not to mention the cutter.........WOW!!!!!!
I hope I can become as good of a machinist as you are, that is some solid skill right there
Absolutely fantastic video, thank you so much. Would love to have a machine like that.
Amazing craftsmanship.
Muito bom! Obrigado por postar esse vídeo. Havia meses que eu estava procurando sobre como fazer essas engrenagens. Nunca vi algo assim parabéns pelo conteúdo. Like e inscrito. Brasil BR
You are an amazing engineer!
Simply amazing
Beautiful!!! Enjoyed watching, thanks.
Super interesting and impressive! I would love to see a video of the encoder build!
Hats off to you! Very well thought out and executed! It is a bit of a mind bender at first . I seems like gear sciving is a kind of rotary broaching technique. Outstanding!
Yes, actually it is a very similar process to rotary broaching (the way it cuts)
I learned something today. And it's still early.
Absolutely beautiful stuff!
Ottima esecuzione, complimenti!!👏👏
Very ingenious way to cut gears, or whatever else that requires precision timing.
Yes, good point. It can not only cut gears, but also splines, toothed pulleys, sprockets, graduation marks, very precise knurling, in fact almost anything you want to repeat uniformly around the circumference of a part.
These videos are some of the best machining I've seen on youtube. So much knowledge here.
I will try and steal a lot of those designs ;)
I’ve some manufacturing background too and studying engineering, I LOVE your video. Amazing skills, and man, that workshop🖤 really wish I can have something like that one day…well…maybe if I would study(as I planned), instead of watching youtube videos…immediately subscribed 👍
Wow ok, that's seriously impressive. Top job!
Impressive! I've only cut spur gears. The stepper seems like it could be applied to a semi-universal indexing head. Great video quality!
A great like for this job! Thank You!
I am Spanish I was impressed by your excellent work, thank you for sharing. It could provide the schematic of the electronic part, or failing that, the program that relates the milling machine speed and the pap motor speed. Thanks a lot
Bloody brilliant!!
Amazing work, thank you!
I used to study machining. However, I would be happier if I were your student
Congratulations! Very interesting. We want more information!
Just ordered some parts to modify a dividing head like this so I suspect that in a month or so everything in my house will have teeth hobbed :) Interesting video, I've never heard of skiving so it will definitely be a useful trick someday
Beautiful! No more words.👍👍👍
Subbed ....great lesson, thank you for enriching our lives
Wow! This is spectacular.
Can't believe this only has 3.1K likes, out of 303,600+ views!!!
Awesome work!
Impressive, amazing , I want to have those skills 👌
That diamond drag tool was pretty neat. Didn't even think something like that existed. Great video!
Also, really great idea on etching the graduations.
High satisfying and amazing work !! Congratulations !! Louis. Oostende.
Really nice work my friend.
Felicidades sr excelente trabajo y su diceño es increíble mi admiración saludos desde México
Wow - you’re incredibly talented. Can’t wait to see what you’re up to next. 👍👍😎👍👍.
imagine a Gear-Hobber at home back 20 years ago
i love what creative people with talent can do this days, with some "cheap" Arduinos and Steppermotors
Very impressive capability with this tool you built! Or maybe I should say "set" as you have the spindle assembly and also the counting stepper controller.
Dam, I miss building and trying this is a true master piece I do the welding and miss playing
You are genius.
Thanks to your great idea for sharing to all
First of all- subbed, because this is the best example of a homemade hobber I've ever seen. Second- skiving is impressive, but poor results (wonder if it was because of heat treat on cutter?)- I'd love to see more of how the cutter geometry and centering of it is done. I'm aware of skiving before this, but was surprised when you pulled that out of the bag!
Lastly- if you have a tool steel blank gear, and cut it to an exact length, with 2 deg. of relief on backsides of form from face- you could make a Hemingway rotary broaching tool- and broach external & internal gear teeth on things. That would be better result than your skiving. Running an MDF disk through the teeth charged with fine diamond paste after hardening would give excellent finish and make the cutter work better too
Thanks! The skiving was really just a bonus feature and not the main reason for building the attachment. I wasn't sure how well it would work, if at all. I don't think the heat-treat was the problem, the cutter didn't dull at all and cut plastic and steel with virtually identical results. I think the main problem was that the geometry of the cutting tool was not correct, skiving seems to be somewhere between hobbing and broaching and calculating the optimal tooth profile for the cutter. Chip clearance was also a problem, and probably other issues too I haven't identified. But it did work well enough to make a usable gear if only for light duty.
Rotary broaching an internal gear is an interesting idea, I could make and harden a cutter easily enough (it would actually be an 'inverted' gear, with addendum and dedendum reversed). But I think it would require more force than my machine could apply except for a very small gear, as it would need to be done in a single pass. I might actually try this with the same 8-tooth cutter used in this video, making an 8-tooth internal gear, perhaps in plastic.
@@AndysMachines Rotary broaching doesn't require tons of force- you just need things roughed out first. If you trace the pattern and mill out most of the stock by hand, it takes a lot of the pressure off. The wobble is around 1 degree, so it shaves very little but quickly with each rotation.
For internal gear- yeah, you'd need a weird hob to make essentially the inverse gear form.
I love this project, and really love how you showed the hobbing of helical spur gears simply. The video really made many things clear.
I won't lie- I really really hope you cover the construction of this in every detail going forward- I really want to make one of these. I've done traditional gear cutting, but would love to get into proper hobbing.
I wonder how you make those cool animation like at 2:51
I am binge watching your videos :) you are truly a master and I wish someday to have your culture, thank you very much for this content you are making
Great video. Thanks!
Wow! That was worth waiting for. Thanks for not making us wait too long. I want one ☺️. BTW, your voice at times reminds me of Eric Thompson (of Magic Roundabout fame) - don't ask why, it just does!
I vaguely remember the Magic Roundabout from my childhood, I'll have to check that out, thanks!