AGMA 98FTM9

It is very difficult to precisely finish agear tooth surface tothe extent of a few sub-micron with grinding. Even if possible, thegrinding time of the tooth surface will be very long and a grindingbum may often occur. The authors have adopted a barreling processas a final finish process in order to improve the ground and/orshot peened surface. Though the barrelling process is economicalfrom the viewpoint of the manufacturing process, there was a veryimportant question whether or not the process is applicable togears with complex configurations. The authors have found that thebarrelling process is very effective for the improvement of geartooth surface roughness without changes in tooth profiles and toothtraces, which may have small tooth tip relief and/or crowning. Inthe present research, the surface durability of the high qualitygear manufactured by a proposed new method was also investigatedusing a gear testing machine, which can measure the condition ofoil film formation between a pair of gears during running. As theresults of durability test, it was confirmed that the configurationof tooth surface of the barrelled gear scarcely changed afterrunning, but that of the shot peened gear remarkably changed. Thecondition of the oil film formation in a running test conductedusing barrelled gears was very good even during start-up. Also, theduration of oil film formation in the case of the barrelled gearwas superior to the one in the case of the ground orshot peenedones, because of the difference of metallic contact condition.

Edition:

98

Published:

10/01/1998

Number of Pages:

11

File Size:

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