Worm gear software .
By Dr. Stepan V. Lunin.
This software was the only worm gear software in 20-th century that could visualize the motion of the worm gear tooth contact in colors in 3 - d.
The program was based on Luninís Direct Digital Simulation Method. On the picture above you can see that a very small mesh covers the worm gear tooth surface. The program calculated the x,y,z coordinates of each point of the mesh. The contact pattern is visualized by painting each triangle of the mesh in correspondence to the distance from the pinion surface.
The picture below is generated on the program in order to show how would the contact look like if you would make such of extreme enveloping worm wheel.
The program helped very much to reduce the development cost of a new worm gear. Because the program simulates the manufacturing process it was much less expensive to do gear cutting iteration on the program using a computer. For example, without the program it was very difficult to predict how much do you need to oversize the hob cutter in order to get a good localized contact pattern. The program was able to show the contact pattern for different misalignments of the hob cutter or misalignments of the pinion.
Increasing stress on worm gear mesh.
When the center distance changes the tooth contact pattern changes as well:
Sample worm gear data