GCr15轴承钢比磨削力建模

Modelling of Specific Grinding Force for GCr15 Bearing Steel

比磨削力不受砂轮宽度或工件宽度的影响,在磨削力研究中具有普适性。为精确预测磨削力,采用中心组合试验设计,以非线性模型线性化后的线性编码为原则,结合工艺手册中磨削参数的常用取值范围(磨削深度a_(p)=10~30μm,磨削速度v_(s)=20~30 m/s,进给速度v_(w)=6~15 m/min),对磨削参数进行非线性编码,通过最小二乘法建立GCr15轴承钢平面磨削时比磨削力的统计模型。试验表明,该模型的平均预测精度达到88%。

The specific grinding force is unaffected by the width of grinding wheel or the width of workpiece,so it can be applied universally for research of grinding force.In order to accurately predict grinding force,the central composite experiment design is adopted,and the linear coding after linearization of nonlinear model is taken as principle,combing with common value range of grinding parameters in process manual(grinding depth a_(p)=10~30μm,grinding velocity v_(s)=20~30 m/s and feed velocity v_(w)=6~15 m/min),the grinding parameters are nonlinearly coded,and least square method is used to build statistical model of specific grinding force during surface grinding of GCr15 bearing steel.The experiments show that the average prediction accuracy of the model is 88%.