correction teeth on planetary gearbox

[ansyolitico]

I followed your advice to correct satellites with x=0.1845
I also played heavily with head(-0.2) and blacklash(0.06) parameters for satellite,
solar blacklash(0.06),
crown head(0.4) blacklash(-0.05) clearence (0) (of which I have doubts about this last parameter if it is correct)

and I performed a further truncature of the tooth extruding a circle of diameter 44.8 (I had to reason on the contrary being the crown a negative).... put in print, assembled, turns very well

because of the absurd values of head and blacklash are due to the fact that by printing you increase by about a tenth profile, in practice if you print an outside circle 10 and inside 5 the real values will be 10,2 and 5,2....and this worries me a little for the relationships

It's not a university project but an extra thing of mine, because I think until you do, you can study how many books you want, but you'll always have partial knowledge of things.

I have no idea how it can be done to touch the parameters of the gear profile in 2d... I think you have to go directly to touch the code in python to do so... .


I have read several times in your interventions that you mention those books... you don't know what I want to find a copy... but I know that they are introvabile... an alternative of the same modern level?

I thank you so much for your availability and advice

 

[meccanicamg]

the clarence value must be greater than or equal to 0.25 and is the radial game. practically moves the tooth bottom of about 0.25•m leaving that air there compared to the tip of the gear to which it ungrates.
If you have modified head, it means that you have truncated on the outside doing about the same work as clarence, but you risk not having sufficiently evolving to gear without pointing.
Unfortunately, there are many books for gears, but there is no one left alone. and they are all books of the last century, when the gears used them heavily.

some useful books:

niemann - machine elements 1-2-3
henriot - theoretical and practical treated gears 1-2
bonfiglioli - manual of the reducer
charchut (new techniques) - Gears theory calculation design
gitin m. maitra - handbook of gear design
...and then a lot of regulations, reports etc.

definitely having a 3d printer that is not sufficiently precise is a mess and you must definitely increase the values in an abnormal way.
is it a good job?

 

[volaff]

All well done tests.
thanks for mechanical suggestionsmg, as usual!

 

[Filo]

I know that with this dirty message the discussion, but I can not thank you for this beautiful confrontation and for sharing it. Thank you.

 

[meccanicamg]

for those who want to learn how to design an evolving and therefore the profile of gears, without using specific workbench or special commands, perhaps with freecad qui It's a nice video.

 

[+forte]

for those who want to learn how to design an evolving and therefore the profile of gears, without using specific workbench or special commands, perhaps with freecad qui It's a nice video.

è in Russian o_o