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扁钢孔型设计不是特殊困难的,问题在于合理分配变形系数和确定立压孔数目。某些扁钢的孔型设计之所以不能令人满意是由于对产量的影响,基本原因在于这种扁钢边长之差很小,因此只能用很小的延伸进行轧制。我厂b/h>2的扁钢(b——扁钢宽度;h——扁钢厚度)传统用图1a所示轧制方法,b/h≤2用带凹边方孔型轧制,如图1b所示。我厂扁钢在横列式φ410x2/φ310x5轧机上生产。所轧扁钢规格繁多(在4～40x12～130mm范围内共400多个规格),对质量要求不断提高,上述传统轧法不能完全地适应产品需要,所以需重新研究探讨能满足产品要求的轧制方法。
Flat steel hole design is not particularly difficult, the problem lies in the rational allocation of deformation coefficient and to determine the number of pressure hole. The reason why the hole design of some flat steel is unsatisfactory is due to the influence on the yield. The basic reason is that the difference between the side lengths of the flat steel is very small, so the rolling can only be carried out with a very small extension. I plant b / h> 2 of the flat steel (b - flat steel width; h - flat steel thickness) Traditionally shown in Figure 1a rolling method, b / h ≤ 2 with concave square pass rolling, As shown in Figure 1b. I flat steel plant in the horizontal φ410x2 / φ310x5 mill production. The specifications of the rolled flat steel (in the 4 ~ 40x12 ~ 130mm range of more than 400 specifications), the quality requirements continue to increase, the traditional rolling method can not be fully adapted to product needs, it is necessary to re-study to meet the product requirements of the rolling System method.