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在查坡罗什钢厂冷弯型钢的冶弯机组上,掌握了以单件生产方式大批量生产标准尺寸的冷弯型钢。在用此种方法时,坯料的前端必须准确地送入孔型,并由孔型稳定夹持。由于在开口孔型中,轧件的腰部不受轧辊的限制,在轧件送入孔型引起轴向串动时,开口孔型的结构就不能保证它对中孔型。当弯曲度很小,也即是腰部抬高量不很大以及断面刚性差、弯曲处不够明显时,很可能使轧件产生轴向串动和在弯曲处”走样”,此外,上辊和下辊相对偏移也能引起“走样”。总之,上述种种均会导致轧件腰部不相等。
In the check slope Roche steel cold-formed steel smelting units, mastered the single-piece production of large-scale production of standard-size cold-formed steel. In this method, the front end of the billet must be accurately fed into the hole and held by the hole. Since in the open-hole type, the waist of the rolling stock is not limited by the rolls, the structure of the opening type can not guarantee its centering type when the rolling stock feeding hole type causes the axial stringing. When the bending is very small, that is, the amount of waist lift is not large and poor section stiffness, bending is not obvious enough, it is likely to produce axial movement of rolling pieces and bending in the “sample”, in addition, the upper roller and The relative offset of the lower roll can also cause “aliasing”. In short, all of these will lead to unequal rolling waist.