主参数：成品管外径（毫米）

Main specifications: max finished tube outer dia（mm）

1）二辊式环孔型冷轧管机工作原理：

该机型是一种周期工作的机械，其主要特点：在轧制过程中，工作机架连同上下轧辊由曲柄连杆机构带动从A点向B点滚压，使管坯在芯的减径和定径段上产生轧制变形，由于机架作往复运动，管坯不断地送进和回转后形成所要求规格的成品管材。

1）double-rollers cycle hole cold rolling mill It is the machine of cycle wording: The working table and the rollers running with the crank rolling from point A to B,make Blank tube adjust with the mandrel. Owing to the working table repeated moving and blank tube feeding and turning, the blak tube rurn into the finished tube with reguired specifications at last

2）多辊式冷轧管机工作原理：

轧机传动系统驱动曲柄连杆加杆机构使机头套筒及轧罪保持架作往复运动，轧辊在斜面滑道上滚动，使孔型从大到小，再大小到大周朗性变化，当孔型至时，回转送时机构动作使坯管实现定量转动及送进，这便是多冷轧管的轧制过程

2） Multi-rollers cold rolling tubing mill

The had sleeve and roller-frame be movedrecip locally by rocker system, The hole cycle changes from little to big and from big to little perodicly. When the hole is maximal blank tube return to the mechanism, turn and feed in limit