Fatigue tests have been run on actual molded gears in order toprovide design data, using fully lubricated, plastic on plasticspur gears in a temperature controlled experiment. The purpose ofthe testing is to see if there is a good correlation betweenfatigue data, generated in a lab on test bars, versus the actualfatigue performance in a gear. In order to do this, the theories ofgear calculations to get root stresses also had to be examined.Advanced FEA showed that there are corrections needed to accountfor high loading or high temperatures in plastic gears. Thechemistry of various nylons used in gears is explained. A highcrystalline nylon has been found which is an excellent material forgears in demanding applications and can withstand high torques andoperating temperatures. The material has very good wear propertiesand excellent retention of mechanical properties (strength,stiffness, and fatigue) especially at elevated temperatures.Several commercial gear applications are currently utilizing theseproperties. These will be shown to demonstrate the benefits andmanufacturability of this material.
- Edition:
- 07
- Published:
- 10/01/2007
- Number of Pages:
- 8
- File Size:
- 1 file , 500 KB
Reviews
There are no reviews yet.