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小号工字钢孔型合理设计是一种经济合理,简单易行的宽缘钢材设计方法。这种方法的特点在于能适合轧机小钢材大或钢材大钢坯小的特殊情况。在宽缘工字钢孔型设计中,除仍遵循各部份延伸均衡而外,采用对角斜轧法作图,使钢坯进入切深孔的状态改变,接触面积增大,比直轧法咬入角减少3°—5°,对于实现顺刮轧制不打滑,很快形成宽缘,保证成品几何形状正确,腿长尺寸偏差稳定,是有其重要意义的。这种方法简便,无须受过专门训练就能掌握,故也可作为大中专专业教学的辅助教材。
The reasonable design of small I-beam hole is a kind of economical and reasonable, easy-to-design wide-edge steel design method. The special feature of this method is that it can be suitable for the special case where the rolling mill is small or large. In the design of wide-beam I-beam, except for the extension and equalization of each part, the diagonal cross-rolling method is used to make the billet enter the state of cutting deep hole, the contact area increases, Biting into the corners to reduce 3 ° -5 °, for the realization of non-slip rolling along the scratch, the formation of wide margin, to ensure that the finished product geometry is correct, leg length deviation is stable, it is of great significance. This method is simple, can be mastered without special training, it can also be used as secondary teaching of professional teaching aids.