Patent ID: 7607209
Filing Date: 2009-10-27
Classification: B23B,F16J,Y10T

Abstract:
1. A surface roughening method, comprising: moving a cutting tool along a longitudinal axis of an article, wherein the cutting tool comprises a radial cutting head, and wherein the radial cutting head comprises a cutting blade with a leading edge and a trailing edge; rotating the cutting tool along the longitudinal axis such that the leading edge of the cutting blade forms a first pattern of peaks and valleys on a surface of the article; and applying stress to the peaks in the first pattern with the trailing edge of the cutting blade to create fracture surfaces and form a second pattern, wherein the second pattern comprises lands at the fracture surfaces separated by grooves, wherein the grooves in the second pattern correspond to the valleys in the first pattern, and wherein a first line drawn along a first wall of the grooves in the second pattern, and a second line drawn along a second wall of the grooves in the second pattern form an acute angle, and wherein a bisector of the acute angle lies above a line drawn normal to the surface of the article.