轧钢厂飞剪自动剪切控制系统设计

电气自动化论文编号:ZD1106    论文字数:18234,页数:46

目 录
摘要……………………………………………………………………………..….………..…..Ⅰ
Abstract………………………..………………………………………………………………Ⅱ
目 录…………………………..………………………………………………………………...Ⅲ
1 前言…………………………..………………………………………………………………..1
   1.1  飞剪的简介…………………..………………………………………...........................1
   1.2  直流控制系统的介绍………..………………………………………............................3
       1.2.1硬件配置……..………………………………………........................4
     1.2.2软件组态及功能……………………………………...................................5
     1.2.3 SIMOREG DC Master 6RA70的特点………………..................................6
2  飞剪动作控制方案设计..………………………………………………………...…….8
 2.1 飞剪结构及工作方式要求…………………….………………….……………..…..…8
2.2  起停式飞剪的控制方案………………………………………………………….........9
 2.2.1 定位控制……………….………………………………………………….…….9
 2.2.2飞剪速度控制：数学建模…………………………………………….………..12
 2.2.3棒材成品长度预测…………………………………………………….……….16
 2.2.4 优化剪切……………………………………………….. ………….………….16
3数字化直流控制系统…………………………………………………………...………...17
 3.1直流控制系统的构成….………………………………………………….………….17
 3.2直流控制系统的功能特点…………………………………………………….………19
4 飞剪现行控制方案…………………………..…………………….…………….………..23
 4.1  现行控制工艺说明………………………………………………….……….………23
 4.2  系统的总体构成……………………………………………………….….…………26
 4.3  浙西轧钢厂起停式飞剪的主要工艺技术参数………………………….………….27
 4.4  PLC控制器的软件设计……………………………………………….….…………28
 4.5 起停式飞剪触摸屏…………………………………………………….…….………..30
5 总结……………………………………………………………………………….………….37
致谢………………………………………………………………………………….………….38
参考文献………………………………………………………………………….…………....39
附录：飞剪动作的程序…………………………………………………………….………….40

摘  要
 为了降低生产能耗，提高棒材生产的产量和质量，现在全连续、全自动化的棒材生产线已经从过去的继电逻辑控制系统发展到了PLC控制系统，全数字化的西门子6RA70系列全数字直流调速装置已经彻底替代了原来模拟控制的直流供电装置。本文设计的就是棒材生产线中最关键的起停式飞剪自动控制系统。
 起停式飞剪是棒线材生产工艺线上的关键设备，其功能对棒材进行倍尺剪切，提高产品质量，提高成材率。由于成品钢材通过起停式飞剪的速度很高，因此对起停式飞剪的控制精度要求非常高；论文较系统地论述了启停式飞剪设计的理论基础。详细地论述了启停式飞剪精确定位、启动延时计算、剪切速度的确定及速度校正和飞剪剪切优化。
 本文论述选用西门子6RA70直流调速装置作为飞剪的控制系统，对控制系统进行了改进，西门子STEP7-300的PLC对飞剪进行控制，大大提高了飞剪工作的可靠性和自动化程度。
 本文以浙西轧钢厂棒材生产线的起停式飞剪控制系统改造为背景，通过起停式飞剪实践运行结果表明，电气装置运行可靠、控制灵活方便，达到了设计目标，解决了制约企业生产发展的难题，实现了良好的经济效益。
关键词：起停式飞剪；全数字直流调速装置；STEP7-300PLC；自动控制

Abstract
 In order to reduce energy consumption and improve the yield and quality of the bar production, complete continuation and full automatization of the bar steel production line has developed to PLC control system, which was used to be relay logic control system, and at the same time, SIMOREG DC master 6RA70 has completely replaced the original analog control of DC power supply unit
 Up-stop flying shears is the important device of the process line of the bar steel. The main function of flying shear is to act double-ruler cunning and to improve product quality and yield. Because the speed of the bar steel is very high when it passes through the up-stop flying sheers, the accurate demand on control of the up-stop flying sheers is very high. The paper discusses the system up-stop flying shears design rationale, the control of the up-stop flying steers mainly concentrate on precise positioning, startup delay calculation, shear velocity and speed correction and flying shear optimization.
 The paper discusses SIMOREG DC master 6RA70 as shear control system, improves the control system. Siemens STEP7-300 of PLC controls the flying shear, and greatly enhances the flying shear work’s reliability and automation level
  The background of the paper is western Zhejiang Province bar rolling mill production line from the up-stop flying shears control system，The practice of this bar steel line shows：electrical installation functions reliably, control reactively and conveniently and it achieves the design goals, solves the problems of restricting the development of production and achieves good economic returns.

Keywords：up-stop flying sheers；full digital DC master；STEP7-300PLC ；control system