Best way to create a gear from profiles?

[tadej001]

Hello everybody!

I'm trying to make a gear with a spline(helix curve) between two or more sections(profiles).
First I made a model with one profile and a helix with the swept option. But when I look at the sketch from which the swept was made and a profile that ends the model. I see that the profile isn't write(It is not anymore in the center of the model).

I attached the model, so you can see how it was made.

I would like, that someone shows me, how to do it...or give me some directions.

thanks,
Tadej

 

[mmauldin]

Maybe this can help:

http://www.eng-tips.com/viewthread.cfm?qid=217094&page=5

 

[jerry1423]

I am not certain, but I think this topic has been brought up previously. Try doing a quick search in this forum and see what you come up with.

 

[hudson888]

This is another recent thread I would be looking at for profile information

http://www.eng-tips.com/viewthread.cfm?qid=229554&page=6

We have delved into helical gears in the past and I think your design intent is basically correct. Another and possibly better way to create the helical twist is a sweep using the axis if determinate length as the single guide curve the gear sketch as the section and an angular law of linear type to describe the helix. In that case you require as inputs to the angular law two angles in degrees being zero at the start and the calculated number of degrees that the helix turns through over the actual width of the gear as defined by its axis being used as the single guide curve.

I think that with thought and a knowledge of gear designs that you could probably even create gear part families based on such a construction method.

Cheers

Hudson