11FTM20-2011

Case Study Involving Surface Durability and Improved Surface Finish

11FTM20-2011 发布历史

Gear tooth wear and micro-pitting is a very difficult phenomenon to predict analytically. The failure mode of micro-pitting is closely correlated to the lambda ratio. Micropitting can be the limiting design parameter for long-term durability. Also@ the failure mode of micropitting can progress to wear or macropitting@ and then manifest into more severe failure modes such as bending. The results of a gearbox test and manufacturing process development program will be presented to evaluate super finishing and its impact on micropitting. Testing was designed using an existing aerospace two stage gearbox with a low lambda ratio. All gears were carburized@ ground and shot peened. Two populations were then created and tested. One population was finish honed and the second was shot peened and isotropic super finished. A standard qualification test was conducted for 150hrs at maximum continuous load. The honed gears experienced micro and macro pitting during the test. The Isotropic Super Finishing (ISF) gears were also tested for 150hr under the same loading. The ISF gears were absent of any surface distress. The ISF gears were further subjected to a 2000hr endurance test. The ISF gears had less surface distress after 2000hr than the baseline honed gears after 150hrs.

11FTM20-2011由AGMA - American Gear Manufacturers Association 发布于 2011-10-01，并于 2013-01-16 实施。

11FTM20-2011的历代版本如下：

• 2011年10月01日 11FTM20-2011

非常抱歉，我们暂时无法提供预览，您可以试试： 免费下载 11FTM20-2011 前三页，或者稍后再访问。

注意： 点击下载后，生成下载文件时间比较长，请耐心等待......

标准号

11FTM20-2011

发布日期

2011年10月01日

实施日期

2013年01月16日

废止日期

无

中国标准分类号

/

国际标准分类号

/

发布单位

AGMA - American Gear Manufacturers Association

引用标准

18

适用范围

Gear tooth wear and micro-pitting is a very difficult phenomenon to predict analytically. The failure mode of micro-pitting is closely correlated to the lambda ratio. Micropitting can be the limiting design parameter for long-term durability. Also@ the failure mode of micropitting can progress to wear or macropitting@ and then manifest into more severe failure modes such as bending. The results of a gearbox test and manufacturing process development program will be presented to evaluate super finishing and its impact on micropitting. Testing was designed using an existing aerospace two stage gearbox with a low lambda ratio. All gears were carburized@ ground and shot peened. Two populations were then created and tested. One population was finish honed and the second was shot peened and isotropic super finished. A standard qualification test was conducted for 150hrs at maximum continuous load. The honed gears experienced micro and macro pitting during the test. The Isotropic Super Finishing (ISF) gears were also tested for 150hr under the same loading. The ISF gears were absent of any surface distress. The ISF gears were further subjected to a 2000hr endurance test. The ISF gears had less surface distress after 2000hr than the baseline honed gears after 150hrs.