响应曲面法优化球墨铸铁切削参数的研究

Optimization of Cutting Parameters of Ductile Iron by Response Surface Methodology

利用有限元技术建立了球墨铸铁QT700镗孔切削的简化模型,为响应曲面法提供试验数据。采用了中心组合设计方法,对试验数据进行多元回归分析,建立了主切削力和切削温度与切削速度、进给量及背吃刀量相关的预测模型。通过对响应面模型的分析研究,确定了各切削参数对主切削力与切削温度的影响。最后通过乘除法建立了主切削力、切削温度和去屑率的综合评价函数,求得在同时保证一定加工质量和加工效率情况下的优化切削参数值。

A simplified model for boring nodular cast iron QT700 is established by using finite element method,which is used to provide the experimental data for response surface methodology.The central combination design method is adopted.Multiple regression analysis is carried out on the test data,and the prediction models of main cutting force and cutting temperature related to the cutting speed,feed rate and cutting depth are established.By analyzing the response surface model,the influence of cutting parameters on the main cutting force and the cutting temperature is determined.Then,the comprehensive evaluation function of the main cutting force,cutting temperature and dandruff rate is established by multiplication and removal,and the optimal cutting parameters are obtained on the plemise of guaranteeing the processing quality and efficiency.