河南理工大学学报（自然科学版）2024，Vol.43Issue(4)：103-110,8.DOI:10.16186/j.cnki.1673-9787.2022040037
薄橡胶层改善喷丸质量机理研究
Study on mechanism of thin rubber layer in improving shot peening quality
摘要
Abstract
Objectives To reduce the surface roughness of metal caused by shot peening,Methods a novel approach was proposed to apply a thin rubber layer on the metal surface.This process aimed to homogenize the impact pressure of particles through the deformation of the rubber layer,hereby mitigating the increase in roughness resulting from particle impacts.The feasibility and underlying mechanism of this new process were investigated.The simulation models of traditional shot peening,adhesive thin rubber shot peeing,and free laid thin rubber shot peeing were established by the finite element software Abaqus.The particle was modeled as a spherical rigid body with a radius of 0.5 mm and an initial velocity of 50 m/s.The workpiece material was Q235,and the Johnson-Cook constitutive model was adopted.For the thin layer rubber,the two-parameter Mooney-Rivlin constitutive model was employed.The friction coefficient between different compo-nents in the simulation model was set to 0.2.All the models were solved by the explicit method.Results The residual compressive stress at the impact point of particles on the workpiece surface was 96,343,252 MPa under traditional shot peening,adhesive thin rubber shot peeing,and free laid thin rubber shot peeing re-spectively.Similarly,the maximum residual compressive stress around the workpiece surface was 391,426,373 MPa respectively.There was a significant increase in the residual compressive stress on the workpiece surface with the thin rubber layer.The impact indentations resulting from shot peening processes was 56.2,26.1,35.4 μm,respectively.The application of a thin rubber layer on the workpiece surface effectively miti-gated its roughness.The distribution of residual stress on the workpiece surface exhibited a close correlation with the thickness of the employed rubber layer.Specifically,when utilizing rubber layers with 0.05,0.20 mm in thickness,maximum compressive residual stresses of 329,373 MPa respectively at distances of 256,141 μm beneath the workpiece surface were achieved.Conclusions The large deformation characteristic of rubber enhanced the impact area of particles and extended the duration of impact,thereby serving as the fundamental reason for the improved shot peening quality achieved by a thin rubber layer.关键词
喷丸/薄橡胶/粗糙度/残余压应力/有限元方法Key words
shot peening/thin rubber layer/roughness/residual compressive stress/finite element method分类
矿业与冶金引用本文复制引用
范俊锴,刘帅,赵武..薄橡胶层改善喷丸质量机理研究[J].河南理工大学学报（自然科学版）,2024,43(4):103-110,8.基金项目
国家自然科学基金资助项目(51405136) （51405136）
河南省科技攻关项目(212102210004) （212102210004）
河南理工大学青年骨干教师资助计划项目(2020XQG-01) （2020XQG-01）
河南理工大学机械工程重点学科资助项目 （）
