摘要
为寻求装配式空心凸轮轴结构设计和材料选择的理论依据,应用弹塑性力学分析了弹性模量和流动应力对液力胀接的影响.将内外管的变形过程简化为平面应变问题,根据典型点应力-应变曲线分析了液力胀接过程,并给出了不同材质套管的连接条件.研究结果表明:影响液力胀接的主要因素是内外管弹性模量和流动应力,这两个材料参数决定胀后内外管弹性回复量的大小;实现液力胀接内外管应满足的条件是: 内外管弹性模量的比值大干内外管流动应力的比值.
Hydro-joining of assembled hollow camshaft is a new technology applicable for manufacturing hollow camshaft of automobile engine with different materials. The keys of the technology is reasonable materials match and proper hydro-joining pressure. Based on elastic-plastic theory, the effect of Youngg modulus and flow stress on the hydro-joining was analyzed in order to provide theoretical basis for structure design and materials match of assembled hollow camshaft. Assuming the deformation of joined pairs as a plane strain model, the process of hydro-joining was analyzed with the stress-strain curves, consequently the joining conditions of different materials were presented. It is concluded that： the core factors in hydro-joining are Youngg modulus and flow stress of joined pairs because of their crucial effects on elastic recovery of the joined pairs ; a necessary condition for hydro-joining is that the ratio of Youngg modulus of inner one to the outer one should be higher than the ratio of flow stress between them.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2005年第4期420-422,426,共4页
Materials Science and Technology
