Research on plastic deformation behaviors and process parameters of dieless clinching joints
To overcome the shortcomings of complex die structure and high alignment requirements of traditional clinching joining process,a new type of dieless clinching joining connection process was proposed.The plastic deformation behaviors and process parameters of dieless clinching joints of AA5052-H32 aluminum alloy sheet with thickness of 2 mm were investigated.The material model of alumi-num alloy was obtained by uniaxial tensile experiment and parameters fitting,based on this material data,the finite element model of the forming process of dieless clinching joints was built.In addition,the equivalent plastic strain,equivalent stress,and material flow of the sheet metal during the forming process were analyzed,and the effect laws of the punch process parameters on the plastic deformation be-haviors of joints were investigated.The experimental and simulation results show that the established finite element model has good accura-cy and can effectively predict the joints forming process.The prediction errors of neck thickness,interlock value and bulge height of the joints are all within 10％,which are 9.4％,1.8％and 0.1％,respectively.The four punch process parameters,namely punch diameter,punch fillet radius,punch height and punch draft slope,have important effects on the plastic deformation behaviors and the final shape of the joints.
万方数据
维普
