Surface grinding performance of spiral bevel gear 30CrMnTi

(1) Experimental study on basic grinding of gear steel 30CrMnTi

Referring to the actual processing conditions of spiral bevel gear, the basic test of surface grinding of gear steel material 30CrMnTi is designed. The influence law of grinding parameters on grinding force per unit width in the process of grinding is dynamically measured by using precision three-way piezoelectric crystal Kistler dynamometer, and the grinding temperature field of gear steel 30CrMnTi is established based on ANSYS, The temperature nephogram of gear steel 30CrMnTi during grinding and the influence law of grinding parameters on the maximum temperature of grinding surface are obtained, which provides a theoretical basis for the subsequent grinding strengthening test and the analysis of grinding surface residual stress.

(2) Experimental study on grinding strengthening of gear steel 30CrMnTi

Under the condition of dry grinding, using a large amount of grinding heat generated by the grinding link can achieve the effect of grinding strengthening the workpiece, so as to further improve the microhardness of the grinding surface. For the gear steel 30CrMnTi material, through the grinding test, firstly analyze the microstructure changes of the strengthening layer after grinding, and then carry out the grinding strengthening test with different grinding speed and grinding depth to study the changes of the microhardness gradient of the strengthening layer, the depth of the strengthening layer and the microhardness of the grinding surface, so as to provide a theoretical reference for the grinding surface strengthening method of gear steel 30CrMnTi.

(3) Simulation study on residual stress of gear steel 30CrMnTi grinding surface

The formation mechanism of grinding surface residual stress is studied. Based on the mechanical thermal coupling theory, the surface residual stress of gear steel 30CrMnTi after grinding is obtained by ANSYS simulation. The variation trend of workpiece surface residual stress before and after grinding is measured by X-ray stress measurement combined with electrolytic polishing, and the residual stress in the grinding process is calculated Δσ Compare with the simulation data to verify the effectiveness of the simulation model. Finally, the effects of different machining parameters and cooling methods on the residual stress of grinding surface are studied.

(4) Experimental study on grinding surface integrity and process optimization of spiral bevel gear

According to the data obtained from the surface grinding test of gear steel 30CrMnTi, determine the appropriate grinding process and process parameter interval, study the variation law of tooth surface residual stress and surface roughness with grinding parameters after grinding of spiral bevel gear, and finally design orthogonal test to optimize the control of process parameters.

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