滚压加工中工件表层微塑性变形深度的解析分析和有限元验证

Analytic study and FEA validation of micro-plastic deformation depth on component surface in burnishing process

在简要介绍滚压工艺的基础上,对目前滚压技术的一些新发展进行了总结,并分析由此带来的对滚压加工机理研究的要求。得出了滚压过程中工件表层发生微塑性变形的深度与滚压力关系的解析公式。通过有限元分析方法采用Johnson-Cook流动应力模型就AISI1045钢和IN718耐热合金两种典型材料的滚压进行了验证,比较结果表明推理假设和解析公式的准确性,为进一步更深入研究滚压机理特别是残余应力和冷作硬化的产生提供了一定的理论依据。

The recent progress and developments of burnishing technique are present,the new requirements of study on burnishing mechanism are analyzed. The expressions describing the relation between micro-plastic deformation depth and burnishing force on component surface are derived, The AISI 1045 steel and IN718 superalloy are selected as burnishing material using FEA to test the validation of the expressions ,in which the Johnson-Cook flow stress model is used. The comparison between two methods proves the validation of the adopted assumptions and the expressions works out.