一、短应力轧钢机械概述

　　工作机的应力回线短的型材轧机，工作机座的应力回线是指轧机受轧制力后，轧机中受力零件弹性变形断面的中性线的联线，应力回线的长度就是轧机中受力零件长度之和。轧钢机座中各受力零件所产生的弹性变形量与其断面积成正比，与其长度成反比，机座中应力回线越短，所产生的弹性变形量越小，则轧机的刚度(见轧机刚度系数)越大，所轧制产品的精度越高。

一.Overview of Short-Stress Steel Rolling Machinery

For profile rolling mills with short stress loops of the working machine, the stress loop of the working machine base refers to the connection line of the neutral lines of the elastic deformation sections

 of the stressed parts in the rolling mill after the rolling force is applied. The length of the stress loop is the sum of the lengths of the stressed parts in the rolling mill. The elastic deformation of each 

force-bearing part in the steel rolling mill base is directly proportional to its cross-sectional area and inversely proportional to its length. The shorter the stress loop in the base, the smaller the elastic 

deformation produced, and the greater the stiffness of the rolling mill (see the stiffness coefficient of the rolling mill), and the higher the precision of the rolled product.

二、缩短轧机应力回线有两个途径

　　一是改变轧机承载结构的形式，即减少轧钢机座中承载件的数量，如无牌坊(机架)轧机，通过缩短受力零件的长度缩短应力回线；二是改变力的传递路径，如使轧制力不直接作用在牌坊窗口的上方，而使其作用在靠近轧机立柱上，使应力回线缩短。一般轧机同短应力线轧机应力线的比较如图。

短应力线轧机主要用于改造横列式轧机，研制复二重式短应力线轧机(见复二重短应力线精轧机组)和研究立式短应力线轧机，建在平一立交替布置的连轧生产线上。

二.There are two ways to shorten the stress loop of the rolling mill

One is to change the form of the load-bearing structure of the rolling mill, that is, to reduce the number of load-bearing parts in the rolling mill base. For example, for a rolling mill without a frame, 

the stress loop can be shortened by shortening the length of the force-bearing parts. The second is to change the transmission path of the force, such as making the rolling force not directly act on

 the upper part of the archway window, but act on the area close to the rolling mill column, thereby shortening the stress loop. The comparison of stress lines between general rolling mills and short

 stress line rolling mills is shown in the figure.

The short stress line rolling mill is mainly used to transform the horizontal rolling mill, develop the double short stress line rolling mill (see the double short stress line finishing rolling mill group) 

and study the vertical short stress line rolling mill, which is built on the continuous rolling production line with alternating horizontal and vertical arrangements.