Method of testing rotationally symmetrical bodies, especially balls, for defects
AssigneeKugelfischer Georg Schafer & Co.
InventorHans Kober
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Abstract
A method of testing rotary bodies, such as balls, for ball bearings, in which the body on a layer of a coupling liquid is subjected to ultrasonic waves transmitted through the ultrasonic liquid and the reflections are measured and displayed. According to the invention the bodies are freely movable in a seat while being immersed in the liquid and jets of the liquid open tangentially into the region between the body and the seat and are intermittently pulsed so that the body undergoes multiaxial rotation.
Claims7
In a method of testing a spheroidal workpiece body for surface and subsurface irregularities wherein a jet of a liquid is introduced tangentially into a clearance between said body and a surface spacedly juxtaposed therewith to rotate said body past a location at which the surface is subjected to scanning, the improvement which comprises intermittently varying the velocity of said jet to impart multiaxial rotation to said body during the monitoring.
The method of driving a spherical workpiece past a location at which the spherical workpiece is scanned for surface and/or subsurface defects, said method comprising hydrostatically and hydrodynamically supporting said workpiece on a layer of liquid in a clearance between a spherically concave socket and the workpiece, introducing a jet of liquid into said clearance tangentially to rotate said workpiece, and intermittently vary the velocity of said jet to induce precessional movement of the workpiece during the rotation thereof.
Dependencies are inferred from the claim text.