Mechanism of residual stress formation and controllable process in plane grinding GT35

The quality problems of steel bonded cemented carbide GT35 parts, such as gyroscope motor bearing sleeve, such as surface cracking and dimensional deformation, often occur due to the improper control of micro-stress during machining, the production of gyroscope has brought no small trouble. In order to investigate the influence of surface grinding process parameters on surface residual stress and realize the controllable process scheme of low residual stress machining, the formation mechanism of GT35 residual stress in surface grinding was analyzed, the grinding experiments were carried out with KP-36 precision grinder, and the factors such as the grinding wheel linear speed, the depth of radial grinding, the workpiece feed speed and the type of grinding wheel bond were analyzed, the residual stress was measured by X-ray diffraction. The results of the experimental study show that, in the process parameters of GT35 steel-bonded cemented carbide surface grinding, the influence degree of radial grinding depth is 49%, the feed rate of workpiece is 25%, the type of binder is 16%, and the linear speed of grinding wheel is 10% The residual stress is minimum when the workpiece feed rate is 18 m/min, and the residual stress of resin bonded grinding wheel is 10% less than that of bronze bonded grinding wheel. GT35 material parts plane grinding residual stress controllable process plan is to use bronze bond diamond grinding wheel and choose 0.002 mm radial grinding depth, 18 m/min workpiece feed speed and 30 m/s grinding wheel linear speed.