Method and Apparatus for Highly Strengthening Metal Member

Author:  T Suzuki; T Kanno; T Taoka, all of Japan
Source:  US Patent 6,099,391
Doc ID:  2000018
Year of Publication:  2000
A mixture of water and glass beads is ejected to a root of a gear which has been cut to form gear teeth. The glass beads are oriented so as to be ejected to the root, and the glass beads and the water impart compressive stresses to the surface of the root and grind the surface of the root.

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