Multi-objective genetic optimization on matrix structure of ultra-high speed grinding wheel
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摘要: 针对砂轮基体在超高速磨削状态下膨胀变形的问题,以控制砂轮基体膨胀变形和降低旋转应力为目的,对超高速磨削砂轮基体进行结构优化。在分析砂轮基体截面形状对砂轮性能影响的基础上,以直线和样条曲线为基本的构造线建立砂轮基体的参数化模型,进而实现了对砂轮基体结构的多目标遗传优化,优化后的砂轮基体在250 m/s的磨削速度下,其膨胀变形和等效应力分别降到30.827 μm和94.97 MPa,与原有砂轮相比分别降低了25.67%和6.44%。Abstract: In order to control expanding deformation in ultra-high speed grinding and reduce the rotation stress,the matrix of grinding wheel is optimized.Based on the analysis of cross section of the matrix,the parameterized model of grinding wheel matrix is established by straight line and spline curve and thus the multi-objective genetic optimization of grinding wheel matrix is realized.The results show that under grinding speed of 250 m/s,expansion deformation and equivalent stress of the optimized grinding wheel matrix respectively decrease to 30.827 μm and 94.97 MPa.Comparing with the original grinding wheel they are respectively reduced by 25.67% and 6.44%.
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