Abstract
The workpiece surface obtains the fine machining during the grinding as well as the impacting effect of grinding wheel, which causes the changing of its hardness. In order to predict the hardness of structural steel workpiece after grinding, the paper established an approximate hardness model of workpiece after grinding by establishing a calculating method for the cooling condition, the model of grinding strain, and the correlation between the equivalent strain and hardness. The hardness value and distribution of hardness field of grinding were predicted by the method with accuracy relatively. The variation and influencing mechanism of hardness along with grinding parameters were studied. And dynamic hardness field of the model revealed the dynamic recovery and recrystallization during grinding. A grinding experiment verified the accuracy of the model approximately.
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