薄壁型材轧机定长锯切控制系统

Fixed Length Cutting Control System for Thin Rolled Section Mill

在型材生产中，由于过程的连续性，因而必须将型材在行进的动态中截断。本文首先分析了薄壁型材加工对定长切割的特殊要求，进而介绍了一个基于ＳＴＤ总线的定长切割计算机控制系统。系统的受控对象为一个可往返运动的截锯小车，该小车在控制作用下对型材切点进行跟踪，并由飞据将型材锯断，选用１６位单片机Ｉｎｔｅｌ８０９８作为控制用的ＣＰＵ，型材长度与小车位置分别用光电码盘和旋转变压器进行测量。该系统适用的最大轧制速度为３６ｍ／ｍｉｎ，精度为±０．１％，一个锯切循环的时间为１０Ｓ。文中阐述了系统的工作原理，并给出了硬件和软件的构成与实现方法。

Because of the continuity of manufacture process,section product must be cut off when it is moving for hard' First special technical requirement of fiXed-length cutting for rolled section rolling is discussed. A computer controlled fixed-lenth cutting system based on STD bus is introduced. The plant of the system is a back-and-forth movable cart with a flying saw mounted. The cart is controlled to followup the point to be cutted,and section is cut off by the flying saw, 16 bit single-chip microcomputer Intel 8098 is selected as control CPU' An opticalencoder and a rotating transformer are used to measure rolled section length and cart positionrespectively The maximum velocity of the system is up to 36 m/min with ± 0. 1 % relativeaccuracy. One cycling time is about 10 s. Working principles of the system are presented. Theconstruction of hardware and software together with their application is given.