钢管斜轧延伸的金属变形研究及孔型设计(下)

Study on Metal Deformation of Steel Tube with Cross-rolling /Elongation and Related Roll Groove Design(PartⅡ)

简要分析了斜轧延伸轧管技术的发展。通过对AccuRoll轧管机变形区中金属变形的理论分析和试验研究,探讨了轧制工艺特征和工具对轧制变形的影响。并将计算机技术应用于变形区模拟分析和钢管主变形分析,提出了斜轧延伸孔型设计的基本原则。试验研究表明,通过AccuRoll轧管机的孔型设计,可实现减径、等径和扩径3种轧制形式。通过优化孔型设计,用AccuRoll轧管机轧制薄壁管,其D/S值已达到41。该工艺技术的发展将进一步提高轧制薄壁管的稳定性和轧制速度。

Development of the steel tube cross-rolling/elongation technology is discussed briefly. And the in- fluence on workpiece deformation by the rolling process characteristics and the process tools is discussed on the basis of the theoretic analysis concerning the metal deformation in Accu-roll mill deformation zone and related ex- perimental research. Simulation analysis of the deformation zone and the analysis of the steel tube main deforma- tion are carried out by means of relevant computer technology. Basic principle concerning roll groove design for cross-rolling/elongation process is put forward. Relevant experimental research demonstrates that the three rolling modes, i.e., diameter reduction, equal-diameter and diameter expansion can be obtained by means of proper roll groove design for Accu-roll pipe mill. Furthermore, the optimized roll groove has ensured Accu-roll mill to produce light-wall tube with D/S up to 41. The development of this technology will further improve the rolling of light-wall tube in terms of operation consistence and rolling speed.