研究的目的是根据卷取带钢规格的要求，力图从理论上确定地下卷取机夹送辊与卷筒的相互位置。
The purpose of the article is to study the correlation between mandrel and pinch rolls of down-coiler according to the requirement coiling strip.
国内卷取机卷筒涨缩液压缸设计的主要方法是参照国外同类设计，其计算公式计算结果与实际工程相差甚远。
The domestic design of the expanding cylinder of tension reel mostly is done consulting to similar foreign design and the results, generally, are far from the actual work conditions.
简述了原有的卷取机卷筒的特点及不足，探讨了改善卷取机卷筒性能的一些途经。
The characteristics and disadvantages of the existing coiler mandrel were described and how to improve the property of the coiler mandrel is discussed in the paper.
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