【摘要】 在总结各种直齿圆柱齿轮精锻工艺的基础上 ,设计了一种直齿圆柱齿轮镦挤精锻工艺和模具 ,并进行了实验和上限模拟。实验模拟证明采用该工艺可以获得满意的直齿圆柱齿轮锻件 ,并表明在变形过程中坯料芯部存在一轴对称变形区。上限模拟通过所设计的简便精确的动可容速度场 ,获得了变形力和轴对称变形区的变化规律。两种模拟结果较为吻合。更多还原

【Abstract】 Based on summing up different kinds of technological process of precision forging of spur gear,a new upsetting extrusion process and pattern die are designed.Experimental simulation is conducted and an analysis is made with Upper Bound Method(UBM).Experimental simulation verifies that a satisfactory forging piece is available,and demonstrates that there exists a axisymmetrical deformation zone in the center of the billet throughout the deformation.Through an easy to use and accurate enough kinematically permissible velocity field designed with UBM,the magnitude of deformation force and the regularities of axisymmetrical deformation zone are obtained.The achievements of UBM simulation are coincident with the outcome of experimental simulation.更多还原