【摘要】 依据文献 [4]的模拟实验结果 ,拟定了楔横轧工艺成形阶梯轴类件时轧件表面出现表面缺陷 (蛇皮状或鱼鳞状缺陷 )时的金属流动速度场。以此为基础 ,并借助于上限原理和最小能量原理 ,获得了楔横轧成形阶梯轴时轧件表面缺陷形成的必要条件。同时 ,研究了表面缺陷产生与变形程度、摩擦因数及模具整形段相对长度的关系。从而为估测楔横轧成形阶梯轴类件时轧件表面是否会产生缺陷提供理论指导。更多还原

【Abstract】 The velocity field has been designed in this article on defect of rolling workpiece surface about cross wedge rolling technique in the process of forming axial symmetry spare parts by result of simulated experiment of consult document[4].The necessary condition has been obtained on forming rolling workpiece surface defect by means of upper bound method and least energy principle.Relationship has been studied on defect to deformation degree,friction factor and relative length of mould plastic section.Theoretical direction may be provided on judging defect of rolling workpiece surface.更多还原