论文部分内容阅读
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。
According to the deformation characteristics of the pipe during rolling process, and combined with the uniaxial tensile curve, a new method of designing the hole diameter Dx is proposed. The designed wall thickness and hole diameter gradually decrease, while the surface shrinkage increases with the increase of stroke, but the increment decreases gradually to make up for the lack of ductility caused by metal work hardening. The results show that the relative deformation of working cone decreases along the length of the rolling direction, which can make full use of the plasticity of the metal. The rolling pressure of each section of working cone does not change much in general, and the maximum pressure distributes in the middle position, Deformation.