EVALUATION METHOD OF DAMAGE DEGREE OF FRETTING WEAR OF ROLLING BEARING, ESTIMATION METHOD OF ANDERON VALUE AND ESTIMATION METHOD OF ANTI-FRETTING PROPERTY OF ROLLING BEARING AND GREASE

• Main Authors: YOKOUCHI ATSUSHI, SAKAGAMI KENTARO, NAKA MICHIHARU
• Format: Patent
• Language: English
• Published: 26.10.2006
• Subjects: BEARINGS; BLASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MECHANICAL ENGINEERING; PHYSICS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; TESTING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To allow the damage degree of a damaged part at an inner ring raceway 2 caused by fretting to be appropriately indexed and the damage degree can be easily and accurately evaluated even in the case of a ball bearing of small diameter. SOLUTION: In the damage part including an irregular damage part with a raised part which is equal to or higher than 0.05 μm included inside, a square frame 8 is the smallest of square frames consisting of four edges in an axial direction and circumference direction of an inner ring 3 in the case of seeing the damage part from a direction vertical to a face including the damage part. An inside area A of the smallest square frame 8 and the maximum height B of the raised part in the square frame 8 are measured. Then, damage degree of fretting wear is calculated as (A×B)1/3. COPYRIGHT: (C)2007,JPO&INPIT