DIMPLE-FORMING BURNISHING TOOL AND DIMPLE-FORMING BURNISHING METHOD
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United States of America Patent
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Issued Date -
Aug 22, 2013
app pub date -
Feb 22, 2013
filing date -
Feb 22, 2012
priority date (Note) -
Abandoned
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Abstract
A burnishing tool includes a mandrel; and a frame fitted to the mandrel and holding balls contacting an outer peripheral surface on the mandrel. The outer peripheral surface has a contact surface with the balls. The contact surface is at a side of the outer peripheral surface which is closer to the work surface. The contact surface and the work surface have a distance therebetween in a direction normal to the work surface. A distance at a side of the mandrel closer to the processing machine and a distance at the opposite side of the mandrel have a distance difference therebetween. A diameter of the outer peripheral surface on the mandrel is set in such a way that the distance difference with the mandrel flexed during formation of the dimples becomes smaller than that before flexing of the mandrel.
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