Analysis for surface quench cracks of big bearing ring;

The final mechanical property of bearing ring depends on the deformation, In order to make bearing ring have good quality and obtain high prouction efficieny, this paper analyzes multiple rolling range in the machining,rang of the equipment, considers the equipment capacity and the deformation of ring blank, and then sets a mathematical model of process parameter in rolling.

To validate the FEM calculations of the cylinder block of a six-cylinder in-line diesel engine,the dynamic strain-stress and temperatures of the main bearing walls and caps were measured on engine testbed with strain-gauge and resistance thermometer.

Since the boost pressure of a diesel engine is increased,the FEM analysis of the main bearing wall to evaluate the structural strength was conducted.