本文提出了一种新的二辊钢管斜轧延伸机,这种延伸机是采用带有“双减”辊型的轧辊、半浮动芯棒和导板。试验证明,这种轧机不论在产品品种上、产量上和质量上还是在消耗指标上均可和国外发展的Assel、Transval和Diesher轧机相竞争,而且有其一定的优点。文中着重阐述了新延伸机的工艺理论,即金属变形和流动、滑移问题、轧制力参数以及咬入条件等。 In this paper, a new two-roll pipe cross-rolling extension machine is proposed. The machine uses rolls with “double minus” roller type, semi-floating mandrel and guide plate. Tests show that this kind of rolling mill can compete with the Assel, Transval and Diesher rolling mills abroad, both in terms of product variety, output and quality, as well as the consumption index, and has certain advantages. This article focuses on the process theory of the new stretcher, that is, metal deformation and flow, slip problems, rolling force parameters and biting conditions.