二辊周期式轧管机孔型设计  

Pass design of two-high cold rolling pilger mill

作　　者：周小芳[1] 

机构地区：[1]长治学院电子信息与物理系,山西长治046011

出　　处：《锻压技术》2012年第3期55-58,共4页Forging & Stamping Technology

基　　金：山西省高校科技开发资助项目(2010128)

摘　　要：根据轧制管材过程的变形特点,并结合单向拉伸曲线,提出设计孔型直径Dx的新方法。设计的各截面壁厚及孔型直径逐渐减小,而面缩率随着行程的增加而增加,但增量逐渐减小,以弥补金属加工硬化引起的塑性下降不足。结果表明,工作锥截面相对变形量沿轧制长度方向逐渐减小,可以充分利用金属的塑性,而且工作锥各截面的轧制压力总体变化不大,且最大压力分布在中间位置,有利于轧制变形。A new method to design the diameter of pass（Dx） was established according to the deformation characteristics of rolling and the properties of unidirectional tensile curve.The thickness of the cross-section and pass diameter were decreased,while the reduction of area increases with the process,but the increment decreases to compensate the insufficient of plasticity decreasing caused by metal hardening.The design results show that the relative deformation gradually decreases along the rolling direction,which can make full use of metal plasticity.The rolling force almost unchangeds during rolling,and the maximum force is located in the middle part,which is convenient to rolling deformation.

关 键 词：轧制 管材 孔型设计 

分 类 号：TG333[金属学及工艺—金属压力加工]