The causes producing wall thickness difference in a same pierced shell are expounded and the influences of piercing, rolling and mandrel drawing on the difference are studied.
阐述了穿孔毛管产生同管壁厚差的原因，研究了穿孔和轧管工艺对钢管同管壁厚差的影响。
And also a rolling optimum controller, which keeps the mandrel feed in rate as requirement, is designed and relative formulas are given.
介绍了一种环轧过程最优控制器的设计方法，该控制器可以使压力辊按要求的进给速率运动。
Working principles: Tool using a self-centering theory, generated through the mandrel roller adjustment hitting, rolling motion.
工作原理：工具采用自定心原理，通过芯轴调节滚柱产生击打、滚压运动。
The relative problems such as designing continuous rolling pass system and optimizing mathematical model operation are solved after practice and utilization rate of the mandrel is increased.
实施后，解决了连轧孔型系统设计、优化数模运算等相关问题，提高了芯棒利用率。
Types of and causes for the surface defects of the CC round billet for pipe - rolling with mandrel mill are analyzed, and quality improvement measures proposed.
简要分析了连铸连轧圆管坯表面缺陷的类别和形成原因，提出了改进圆管坯质量的措施。
The paper gives a brief introduction to three types of mandrels used for the two-high pilger cold-rolling mill, namely, mono-cone mandrel, dual-cone mandrel and parabolic mandrel.
本文简要介绍了周期式二辊冷轧管机所使用的单锥度芯棒、双锥度芯棒及抛物线芯棒。
A hydraulic limiter for the mandrel of a pipe mill relates to the hot rolling pipe mill of seamless steel pipe.
一种轧管机芯棒液压限动装置，涉及无缝钢管热轧管机。
At present, the ring rolling technology roll one ring in one process, and the technology can't deal with stress focus on the sharp taper Angle of mandrel roller.
目前锥形套圈辗扩技术只能一次成形一件，而且由于锥形套圈锥角使得芯辊应力集中严重。
At present, the ring rolling technology roll one ring in one process, and the technology can't deal with stress focus on the sharp taper Angle of mandrel roller.
目前锥形套圈辗扩技术只能一次成形一件，而且由于锥形套圈锥角使得芯辊应力集中严重。
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