12架微张力减径机壁厚变化数学模型的研究

Study of the Math Model of WT Variation in 12-stand Mini-stretch Reducing Mill

摘要: 在12架三辊式微张力减径机上,实测了增壁率、减径率、壁厚系数、减径温度、减径速度、张力等主要参数,分析研究了这些参数对生产典型品种无缝钢管壁厚精度的影响程度,通过计算机回归处理得出壁厚不均数学模型公式,经现场实践证明该数学模型是有效的。

Abstract: The parameters such as wall thickness upset rate, diameter reduction rate, wall thickness coefficient, diameter reduction temperature, stretch force are measured in practice on 12-stand 3-roll mini-stretch reducing mill and the effects of these parameters on the wall thickness accuracy of typical varieties of seamless steel pipes are analyzed and studied. The math model formula for the calculation of non-uniform wall thickness is derived from the computer-aid regressive processing and the math model proves to be effective on the spot in practice.