approximation of tredgold

[Martakynghi]

Hi, guys, I wanted to ask you if there's someone who can explain the approach of tredgold, on the internet I can't find anything about this and the prof's notes I don't understand. what I understand is that the conical wheel is approximated to a partial cylindrical wheel.

 

[meccanicamg]

I didn't know it.
But I think it's just the speech that if you take the average width of the conical gear, on it you can do all the checks as if they were two coupled cylindrical wheels.
the wheels for really are like this:In fact, to switch to this fake cylindrical gear you need to calculate the virtual parameters.

then virtual parameters are:and with these you do pressure and bending verification.

look that is explained here. 45 e din tower.