| 摘要 |
<p>A method for forming a precision groove in a cylindrical surface of an article such as a sleeve-shaft hydrodynamic journal bearing system includes the steps of: aligning a groove-forming machine to an axial datum plane (20) of the article defined in a spaced-apart relation with the cylindrical surface (16,18) by a predetermined nominal first dimension, translating the groove-forming machine in an axial direction toward and upon a first edge of the cylindrical surface by an amount equal to the predetermined nominal first dimension and thereupon forming a first groove axial step segment (38) in the cylindrical surface until a second predetermined axial datum plane (d2) is reached, simultaneously axially translating and rotating the groove-forming machine from the second axial datum plane until a third predetermined axial datum plane (d3) is reached and thereupon forming the precision groove pattern (36) in the cylindrical surface between the second axial datum plane and the third axial datum plane, and axially translating the groove-forming machine from the third predetermined axial datum plane until a second edge of the cylindrical surface is reached and thereupon forming a second groove axial step segment (40) in the cylindrical surface from the third axial datum plane to the second edge. A hydrodynamic bearing system formed in accordance with the disclosed method is also claimed. <IMAGE></p> |
