Finite Element Analysis Of Rotary Forging In Straight Tooth Bevel Gear

Rotary roll is a new technology that applied in partly presswork succession plasticity forming. The cold rotary forging used in straight tooth bevel gear is an advanced technique which used in gear processing. It has a good many merits, such as high material utilization, high productivity, low manufacturing cost, high gear mechanical property, high service life and high forming dimensional accuracy etc. It widely applied in gear processing.This thesis based on the research of the rotary forging in straight tooth bevel gear technology. Finite element analysis is employed to research the process of cool rotary forging in differential satellite gear. The statuses of strain and stress, metal flow rule and force-time curve are obtained and reveal the deformation characteristic. And the essence cause of the cavity die's invalidation has been discussed.The straight tooth bevel gear's rotary roll model has been created in three-dimensional molding software UG based on its prototype. The models which will be used in DEFORM-3D have been gotten. They're the foundation of finite element analysis in straight tooth bevel gear's rotary roll.The models of finite element analysis used in straight tooth bevel gear's rotary roll have been created based on the rigid plasticity finite element theory. The statuses of strain and stress, metal flow rule have been gotten based on the three-dimensional simulation software DEFORM-3D by the use of rigid plasticity finite element analysis. The deformation process, equivalent stresses, equivalent strains are showed by figure and curve. And the deformation rulers have been gotten.Invalidation form of straight tooth bevel gear of rotary roll cavity die has been analyzed, and the finite element simulation method is employed to change the processing parameter of rotary roll. The effect of feed rate of cavity die, friction factor and inclination of rotary head on die stress and die invalidation form have been analyzed and discussed based on the manufacture experiences and finite element analysis. Stress contrastive curve in different processing parameter have been gotten.