Patent ID: 7093481
Filing Date: 2006-08-22
Classification: G01N,Y10T

Abstract:
1. A method of roller burnishing out the tooling marks on the central portion of a lathe-turned heater tube blank for use in a machine for testing fuel quality, said method of roller burnishing being applied to a roller burnishing machine having three tapered rollers equally spaced around the central portion of the lathe-turned heater tube blank having tooling marks thereon and driven by a rotating mandrel, said method of roller burnishing out the tooling marks from the central portion of the lathe-turned heater tube blank comprising the steps of: setting the pressure of the three burnishing rollers on the central portion of the lathe-turned heater tube blank so that the overall length of the finished heater tube has increased by no more than about 0.002 inches per inch of length of the central portion of the heater tube; and setting the speed of the burnishing rollers with respect to the lathe-turned surface of the central portion of the heater tube blank so that no tooling marks are visible with a magnification of the surface finish of substantially ten times.