1.问题的提出本厂Φ60、Φ76高频焊管机组自投产起,一直生产低压流体输送管,设计孔型尺寸时参考了国内同类焊管生产厂家的轧辊孔型尺寸,采用圆周变形法单半径孔型系统。定径机架最末架水平辊(成品孔型)孔型是按成品钢管外径负偏差之半选取的,定径量是根 1. The problem put forward Φ60, Φ76 high-frequency welded pipe unit since its inception, has been producing low-pressure fluid pipe, the design of the hole size reference to the domestic pipe manufacturers similar to the size of roll pass, the use of circumferential deformation of a single radius hole Type system Sizing frame the last frame horizontal roller (finished hole) hole type is finished steel tube diameter deviation of the negative half selected, the amount of caliper is the root