GearHeads Forum

Out of those 5 theorems, they lost me at the first. 
Cheers Damo

Actually, i'm just happy i understand the word "octoid" now.

Words just dont work..do they.

Art

Yes but will it cook the turkey on Gas MK 5 ?

Hey Art, Anything new with the bevels or are You busy working on other things?

Hi:

  Bevels will be dealt with in a waterline engraving module, but probably not till next fall.

Art

Art,

Here is another paper on spiral bevel gear generation and inspection.

http://gear-net.com/report/rep-03.html

Also Klingelnberg method is in a spread sheet with macros that create tooth form for Solid Works IGES inport.

https://www.youtube.com/watch?v=k-WdPTxinZk

Chuck in Wyoming

ArtF wrote: Hi:

  Bevels will be dealt with in a waterline engraving module, but probably not till next fall.
...

Naively, it seems like the easiest way to cut bevel gears on a 3-axis CNC machine would be to generate a gear profile numerically, and then profile cut with a ball nose end mill, but I haven't seen any discussion of that in the thread.  Is there some compelling reason not to take that approach?

Nate:

Thats the plan. Its not easy to cut bevels, but for beverls less than 45 degrees, the workbench shoudl be
able to profile them, for more than 45 degrees, he 4th axis shoudl eb able to profile them..

Art

ArtF wrote: That's the plan. Its not easy to cut bevels, but for bevels less than 45 degrees, the workbench should be
able to profile them, for more than 45 degrees, he 4th axis should be able to profile them..

A bevel gear with lots of helicity, a small pressure angle, and large teeth can have both radial and axial overhangs.  (That is to say, require a 'tilt' or 5th axis set up.)  I'm not sure whether gears like that have any practical application.

This is a section of a decorative bevel gear I  modeled.  If the pitch cone angle were larger, you can see that there would be a 'double undercut'.