液压活套控制机理研究

The Research of Hydraulic Control System for Looper

在热连轧精轧机组中,活套是极其重要的核心设备,具有很重要的两项功能:①活套能维持一定板带套量功能,避免拉钢和堆钢,保证轧机轧制正常;②活套张力自动控制功能,能保持机架间张力恒定,提高产品尺寸精度,保证产品质量。而液压活套以其高灵敏性和快速性在现代热连轧工艺中得到广泛应用。该文对液压活套的几何结构和四通伺服阀控制系统进行分析梳理,首次揭示活套角和活套缸输出力的图形函数关系,列出活套伺服阀四通控制的静态方程。

In the hot rolling mills, looper is the extremely core equipment, which has two functions: first, it is important to maintain a certain set of live in with a set of functions, to avoid drawing steel and steel pile, ensure normal rolling;two, automatic control of looper tension, can keep the tension constant, improve product precision and ensure the quality of products. The hydraulic looper is widely used in the modern hot continuous rolling process because of its high sensitivity and rapidity. In this paper, the geometric structure of hydraulic looper and the four way servo valve control system are analyzed and combed. For the first time, reveal the graphical function relation between looper angle and looper cylinder output force, and list the static equation of four way control of looper servo valve.