Machining of bearing trunnions of rolls by heavy lathes in conditions of repair production

Abstract

Technology has been developed, tested on plants and theoretically justified for repair of precision bearing trunnions of oversized ‘raw’ rolls in which emphasis is done on use of unusual technique in machining of such details on heavy lathes essence of which is to regulate upper slides of lathe support taking into account distances between repairing trunnions. It is not always possible to obtain required surface parameters with roughness Ra = 0.8...0.4 μm as well as surface compressive residual stress since machining on lathe is carried out using cutting tool and especially in conditions of repair production. It is proposed to use additional device for grinding in order to solve this problem.