大重型轧辊磨床顶尖承载能力影响因素分析

Analysis on Influence Factors of Center Bearing Capacity in Heavy-Duty Roll Grinder

在大重型轧辊磨床顶磨机床中,顶尖直接承受轧辊重力,是整个机床中受力和变形最大的部件。顶尖的承载能力决定着轧辊外圆面的磨削精度,因此设计合适的顶尖成为磨床设计的重要部分。利用有限元软件、运用控制变量法、通过多组实验研究顶尖角度、配合长度和摩擦因数对顶尖承载能力的影响,得到了多组分析数据,并拟合出了应力、变形和接触力等变化趋势曲线,从曲线可以直观地看出各因素对各指标的影响灵敏度,这可为顶尖的设计和选用提供一定的理论参考依据。

In the heavy-duty roll grinder, the center bears directly the gravity of the roll. It is the largest stress and deformation part in the roll grinder. The center＇s bearing capacity determines the cylindrical grinding precision the roll, so an appropriate center is important for a roll grinder. By using the finite element software, adopting the control variable method analyzes the influence of the center angle, the contact area and the friction factor to the bearing capacity of the center through a series of simulation experiments. Multiple sets of analysis data were obtained and the stress, deformation and contact force changing trend curves were fitted. The influence sensitivity of various factors on the various indexes can be figured out easily from these curves. It can provide theoretical reference for the design and choice of the center.