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近年来,在ХПТ和ХПТР轧机上冷轧钢管时,机架正、返行程前采用坯料送进和迴转的做法得到了广泛的应用。在这种情况下,金属的变形条件与普通过程中所见到的情况大不相同,也就是在机架正行程之前才送进金属。为了计算工具的孔型和保证产品的质量,我们着重研究了确定金属压下量的方法和金属在机架行程中的纵向移动。在返行程情况下,对于过程的分析,由于轧辊的旋转方向和金属纵向(直线)移动
In recent years, ХПТ and ХПТР mill cold-rolled steel, the positive rack, back and forth before the use of blank feed and rotation has been widely used. In this case, the deformation conditions of the metal are very different from those seen in the normal process, that is, the metal is fed into the rack just before the stroke. In order to calculate the tool hole and to ensure the quality of the product, we focused on the method of determining the metal reduction and the longitudinal movement of the metal in the rack stroke. In the case of the return stroke, for the analysis of the process, due to the direction of rotation of the rolls and the longitudinal (linear) movement of the metal