Method and manufacturing of ball bearing rings

Abstract

Method of manufacturing of ball bearing's rings by rolling-out of the blanks from bearing's steel using a roll-out machine where the blank is heated at the temperature between 600° C. and 800° C. advantageously between 700° C. and 720° C. before being rolled-out.

1 . A method of manufacturing ball bearing rings comprising the step of:
 rolling-out a blank from bearing steel using a roll-out machine;   wherein the blank is heated at the temperature between  600 ° C. and  800 ° C. before being rolled-out.   
   
   
       2 . The method according to the  claim 1 , wherein the blank is heated at the temperature between 700° C. and 720° C. before being rolled-out. 
   
   
       3 . The method according to the  claim 1 , wherein the rolled-out blanks are blanks from hammer forging or die forging. 
   
   
       4 . The method according to the  claim 1 , wherein the rolled-out blanks are lathe-turned blanks. 
   
   
       5 . The method according to the  claim 1 , wherein the rolled-out blanks are rings divided from thick-walled tubes. 
   
   
       6 . The method according to the  claim 2 , wherein the rolled-out blanks are blanks from hammer forging or die forging. 
   
   
       7 . The method according to the  claim 2 , wherein the rolled-out blanks are lathe-turned blanks. 
   
   
       8 . The method according to the  claim 2 , wherein the rolled-out blanks are rings divided from thick-walled tubes.