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二、板轧机液压压下系统液压压下系统是现代高速轧机自动化的关键环节,其功用是不管引起板厚偏差的各种干扰因素如何变化,都能自动调节压下机构,保持实际辊缝恒定,使板厚不变。压下系统是电液位置伺服系统,特点是调节对象复杂,负载对系统的影响复杂,干扰因素多,而精度和快速性要求高,因此系统复杂。国内目前处于试验研究阶段。这里借用某试验轧机设计方案的例子,简介压下系统的控制原理、设计程序及分析方法,着重说明对于复杂的系统,如何通过分析和试验得到一个简化而又合理的轧机物理数学模型,进而获得系统结构图;并说明在系统分析中如何应用结构图这一得力工具,通过结构图的耦合与变换,直观而简便地求取系统的传递函数,并获得简要的分析结果,而避免繁复的公式推导。
Second, the plate mill hydraulic pressure system Hydraulic pressure system is the key to modern high-speed mill automation, its function is caused regardless of the thickness of the deviation caused by various interference factors, can automatically adjust the pressure mechanism to maintain the actual roll gap constant , So that the same plate thickness. The press-down system is an electrohydraulic position servo system, which is characterized by complex objects to be adjusted, complex load impact on the system, many disturbing factors, and high accuracy and rapidity requirements. Therefore, the system is complex. At present, China is in the stage of experimental research. In this paper, an example of the design of a test rolling mill is borrowed. The control principle, design procedure and analysis method of the rolling reduction system are introduced. The simplified and reasonable mathematical mathematical model of rolling mill is obtained through analysis and experiment. System structure diagram; and explains how to apply the structure diagram in the system analysis, which is an effective tool that can intuitively and simply calculate the transfer function of the system through the coupling and transformation of the structure diagram, and obtain the brief analysis results, avoiding the complicated formula Derived.