设计师在编制扁坯的轧制工艺时,对坯料的前后端轧制情况十分感兴趣,因为在坯料的厚度方面上常常形成突出部分,而在宽度方向的中部出现了内凹形状,这就是所谓的切头部分,其损耗约占总坯料重量的3%。虽然扁坯锭的连续铸造新近有了显著的进展,但是坯锭的轧制在钢铁工业中仍然是极为重要的,因为大量钢材仍要进行轧制加工,因此,在扁坯和坯锭的生产工艺中,即使有很小的改进,对减少损耗也有较大的帮助。关于测定轧制力、扭矩及轧辊与轧材沿接触弧间的压力分布、轧制的宽展、变形和分布诸问题,一直是许多研究人员进行理论和实践研究的课题,并已取得了很多成果。但是这些成果都限于稳态轧制情况,没有涉及前后端的端部条件。至今只有少数几篇文章涉及了这个问题。 Designers in the preparation of the slab rolling process, the front and rear end of the blank rolling is very interesting, because the thickness of the blank is often formed in the protruding portion, while in the width of the central concave shape, which is The so-called head part, the loss of about 3% of the total weight of the blank. Although significant progress has recently been made in the continuous casting of slabs, the rolling of billets remains of crucial importance in the steel industry, since a large amount of steel is still being rolled and therefore, in the production of slabs and billets Process, even with minor improvements, is also helpful in reducing losses. Questions about the determination of rolling force, torque, and pressure distribution along the contact arc between the roll and the rolling stock, the wide spread, deformation and distribution of the rolling have been the subject of many theoretical and practical studies by researchers and many have been made Results. However, these results are limited to steady-state rolling conditions, not related to the front and rear ends of the conditions. So far only a few articles cover this issue.