车削参数和滚挤压参数对滚轮滚挤压表面质量影响分析

滚挤压是一种金属表面微塑性连续变形精加工工艺,现在日益被用作切削加工后的表面强化终处理工艺以获得具有压缩残余应力的高性能低粗糙度的镜面零件表面。本文分析了车削前处理工艺对后续滚挤压加工效果的影响,采用考虑交互作用的L27(313)正交试验设计与分析方法研究了车削滚挤压复合工艺中车削三要素(即车削速度v、车削进给量f、车削深度ap)和滚挤压三要素(即滚挤压速度vb、滚挤压进给量fb、滚挤压深度ab)对滚轮滚挤压45号钢的滚挤压效果(即表面粗糙度Ra、小负荷维氏硬度Hv的影响规律),其中考虑了对滚挤压效果影响最显著的车削进给量f、滚挤压深度ab与滚挤压进给量fb两两之间的交互作用,分析得出了对滚挤压效果影响最显著的主要因素及其规律。从试验的角度发现车削进给量对滚挤压效果有显著影响,与理论分析和预测相吻合。

Research on Influence of Turning Parametersand Burnishing Parameters on Roller Burnished Surface Quality

Burnishing,an ultra-precision superficial micro-plastic deformation process,is used increasingly as a surface enhancement finishing treatment after machining operations not only to give a mirror-like and work-hardened surface but also to introduce favorable compressive residual stress in it. The aim of this study was to analyze the influence of the initial turning process on the burnishing effects by utilizing the Taguchi's L27(313) orthogonal array method,three turning parameters,namely the turning speed,turning depth and turning feed,three burnishing parameters,namely the burnishing speed,burnishing depth and burnishing feed were selected as the experimental factors in the Taguchi's design of experiments to determine which one has the dominant influence and how it works on burnishing effects,namely the surface roughness and surface microhardness,the pairwise interaction between turning speed,burnishing depth and burnishing feed were also considered. The experimental data agreed well with the theoretical analysis made before and the result is turning feed has dominant influence on the burnished surface quality.