help creation tooth profile

[meccanicamg]

today I have a moment of time and I have the opportunity to verify the goodness of freecad con il workbench fcgear.
I don't normally use the game's increase but I know that unfortunately the script has triggered an order error of magnitude \(10^3 \), but knowing it is not a problem.

here setting with zero game.here under the game settings where it was actually removed 0.4mmso let's say that even this program, although free can be used for the analysis of teeth geometries.
as you see the bottom radius is not 6 mm but 9,4mm because I prefer that the bottom radius maintains the proportion according to rules of 0,375*mn which then is rounded to 0.38*mn. in this way the sensitivity to the carving of the tooth bottom decreases and the gears can increase the load capacity and fatigue resistance.

 

[spinner3000]

today I have a moment of time and I have the opportunity to verify the goodness of freecad con il workbench fcgear.
I don't normally use the game's increase but I know that unfortunately the script has triggered an order error of magnitude \(10^3 \), but knowing it is not a problem.

here setting with zero game.View attachment 57827here under the game settings where it was actually removed 0.4mmView attachment 57828so let's say that even this program, although free can be used for the analysis of teeth geometries.
as you see the bottom radius is not 6 mm but 9,4mm because I prefer that the bottom radius maintains the proportion according to rules of 0,375*mn which then is rounded to 0.38*mn. in this way the sensitivity to the carving of the tooth bottom decreases and the gears can increase the load capacity and fatigue resistance.

Unfortunately, I'm unlucky, I've inserted the same parameters that you put on, but I think the program has a bug and it comes out like this:

 

[spinner3000]

thanks to your example I managed with kissoft I set on primitive game on the sides to 0.8mm
and the result is this:I would say that now we have a correct result

the good old autocad never disappoints

 

[PIETRO2002]

thanks to your example I managed with kissoft I set on primitive game on the sides to 0.8mm
and the result is this:View attachment 57843I would say that now we have a correct result

the good old autocad never disappoints

So what I told you to take 0.4 on each side is confirmed.

 

[spinner3000]

So what I told you to take 0.4 on each side is confirmed.

tomorrow I ask official confirmation.
But I think it should be like you said.

 

[meccanicamg]

Unfortunately, I'm unlucky, I've inserted the same parameters that you put on, but I think the program has a bug and it comes out like this:
View attachment 57842

is the backlash that must be 400 nm nanometers... explained above.

 

[spinner3000]

is the backlash that must be 400 nm nanometers... explained above.

Excuse mea culpa,
I corrected and now I have the same results as kissoft!
well so, after all this I learned to better interpret the data of the teeth and have a control over the results.
tomorrow I ask if you want the game on the tooth thickness or you need the profile correction so you always get that result to drawing,
thanks to all for help and advice
the world of gears is very complicated is I noticed that it requires a study base on the topic.

 

[meccanicamg]

Excuse mea culpa,
I corrected and now I have the same results as kissoft!
well so, after all this I learned to better interpret the data of the teeth and have a control over the results.
tomorrow I ask if you want the game on the tooth thickness or you need the profile correction so you always get that result to drawing,
thanks to all for help and advice
the world of gears is very complicated is I noticed that it requires a study base on the topic.

but the most beautiful thing is that we have shared very actively and I think that each one of us has brought home something more than before?

 

[PIETRO2002]

but the most beautiful thing is that we have shared very actively and I think that each one of us has brought home something more than before?

Yes, yes, you always have to learn... But I'm also curious to know where a gear like that will be worked... Alestress? vertical lathe? Dentist? ...

 

[meccanicamg]

the international and national indications are regulated by the old norm uni 7462 of the distant 1975 (well 45 years ago) that says that for the straight teeth wheels it is necessary to indicate:
while for helical wheels...the minimum parameters to indicate are:therefore the values are nominal with the addition of tolerance and game.

going for deduction, for our 305 teeth wheel is as we said, without profile shifting and with shifting erosion to generate the game by measuring the thickness and rope height.