Method for increasing bearing capacity of surface-hardened rolling bearing raceway and rolling device for hard rolling thereof

• Main Authors: LUNEBURG BERND, TUCKER MATTHIAS, LEVIN, CHRISTIAN, HANDRICK THOMAS, ROLLMANN JORG
• Format: Patent
• Language: Chinese; English
• Published: 08.07.2022
• 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; MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS,WHEELS, RINGS, BARRELS, BALLS; MECHANICAL ENGINEERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

The invention relates to a method for increasing the bearing capacity of a surface-hardened rolling bearing raceway of a rolling bearing ring element, comprising: providing a rolling bearing ring element having an unhardened core region (K) and a surface layer (Ra) which is at least partially hardened with a surface hardening depth (Rht), wherein a rolling bearing raceway is formed in the region of the hardened surface layer (Ra),-hard rolling of the rolling bearing raceway with a roll,-the diameter of the roll being selected in the range of 8 to 25 times the surface hardening depth (Rht),-the surface hardening depth (Rht) being less than the surface hardening depth (Rht),-the surface hardening depth (Rht) being less than the surface hardening depth (Rht). Adjusting the surface pressure present in the rolling contact between the roll and the rolling bearing track during the hard rolling to a range between 2000 MPa and 3300 MPa, and cutting the rolling bearing track after the hard rolling, the invention furthe