椭圆截面轴类零件楔横轧成形关键技术研究  

Study on key technologies of shaft parts with elliptical section formed by cross wedge rolling

作　　者：胡发国[1] 王宝雨[1] 胡正寰[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《锻压技术》2009年第5期71-74,共4页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(50675019;50435010);北京市自然科学基金资助项目(3082013);国家科技支撑计划项目(2006BAF04B03)

摘　　要：提出了用楔横轧工艺成形椭圆截面轴类零件的一种新工艺,推导了随转速比变化的模具辊形曲线,采用三维刚塑性有限元软件Deform-3D对成形过程进行了数值模拟。在轧制过程中,轧件在模具的作用下径向压缩、轴向延伸的同时椭圆轮廓在模具顶面辊形曲线的作用下,逐渐轧制成形;得到了在楔入段、展宽段变化稳定,精整段呈周期性跳动的轧辊与轧件转速比变化曲线,以及周期性波动的力能参数曲线。A new technology of shaft parts with elliptical section formed by cross wedge rolling was presented. The roller shape curve of dies changed with rotational speed ratio was derived. The forming process of shaft was simulated by using the three-dimension and rigid-plastic FEM software DEFORM-3D. During the course of roiling, while the rolled piece was radial compression and axial elongation under the action of dies, the elliptical profile was gradually generated by the roller shape curve at the top surface of dies. The change curve of rotational speed ratio presented stable at the stage of knifing and stretching, and cyclical fluctuation during finishing stage. Also periodic change mechanics parameter was obtained.

关 键 词：椭圆截面 楔横轧 转速比 数值模拟 

分 类 号：TG335.19[金属学及工艺—金属压力加工]