基于响应曲面车削加工表面粗糙度稳健性分析

Surface Roughness Robustness Analysis for Turning Operations Based on Response Surface Methodology

随着现代科学技术的发展,对零件的表面加工质量提出了越来越高的要求。但由于机械加工过程较复杂,各种参数都不同程度地影响着表面粗糙度,表面粗糙度分析时,很难建立显式的解析模型。本文提出基于响应曲面法建立表面粗糙度可靠性指标对应刀具结构影响参数的灵敏度分析模型。结果表明,表面粗糙度对刀尖圆角半径r的变化最为敏感,对主偏角κ的变化敏感次之,对前角γ变化不敏感;刀尖圆角半径、主偏角和前角对表面粗糙度的贡献率分别为56.82%,27.84%和9.75%。

With the development of science and technology, the more excellent surface quality of part is demand. But considering the complicated relation of machining parameters to surface roughness, the explicit analytical model has not been fingered out. Response surface methodology is introduced to build parameter sensitivity model corresponding to reliability of surface roughness to structure parameters of the tool. The results show that the tool nose radius and the approach angle are the dominant factors influencing the surface roughness, accounting for 56.82% and 27.84% of the surface roughness, respectively. Surface roughness is insensitive to rake angle. The rake angle only accounts for 9.75% of the surface roughness.