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1、摘摘 要要烟草行业进入 20 世纪以来，得到了迅猛的发展。尤其卷烟生产，已逐渐上升到了烟草工业的主导地位。卷烟生产自动化程度也成为了烟草行业发展的重要指标。本文以徐 州众凯机械生产的新式烟梗预处理生产线为研究对象，实现烟梗预处理生产自动化。设计前期通过对烟梗预处理生产线工艺流程的分析，得出了控制流程与控制方案。经 过对徐州众凯机械厂的实际调研、考察之后，对设备类型的分析得出控制系统的控制方 法。进而分析该设备的运行特点，完成检测仪表、执行元件的选型。以西门子 S7-200 系 列 PLC 为控制系统核心。完成了控制系统的整体设计及 PLC 的选型。在此基础上，进一步 完成了控制柜板面及柜内设计
2、，绘制了 PLC 接线图、端子接线图、仪器仪表接线图等相关 工程图纸。系统软件基于 v4.0 STEP-7 MicroWIN SP4 进行开发。结合烟梗预处理生产线的运行 实际情况，用顺序功能图法进行软件的设计分析。通过对顺序功能图和软件梯形图之间 的转换，完成软件的开发。软件实现了烟梗预处理生产线自动控制系统设计，并能实现 过载保护、自动报警、信息记录等附属功能。最终系统设计实现自动上包、自动开包、烟梗在线称重、在线分选除杂、烟梗湿度自动控制等功能。关键词：烟梗预处理；自动控制；PLC；系统设计ABSTRACTThe tobacco industry has been rapid devel
3、opment since the beginning of the 20th century. In particular, cigarette manufacturing, and has gradually risen to dominance of the tobacco industry. Cigarette production automation has become an important indicator of the tobacco industry. In this paper, for the study of Xuzhou ZhongKai machinery m
4、anufacturings tobacco stems pretreatment production line, in order to achieve automation of pretreatment of tobacco stems. Design early on tobacco stems pretreatment production line process, and analyze the control flow and control program. After the actual research and investigation of ZhongKai mac
5、hinery manufacturing in Xuzhou, we analysis of the type of equipment control system derived control, further analysis of the operational characteristics of equipment, complete testing instruments, the implementation of component selection. The control system is based on Siemens S7-200 series PLC. Co
6、mplete control system for selection of the overall design and PLC. On this basis, further complete the control cabinet panel face and cabinet design, rendering the PLC wiring diagram, terminal connection diagram, wiring diagrams and other related instrumentation engineering drawings. System software
7、 is based on v4.0 STEP-7 MicroWIN SP4 for development. Combined operation of the actual situation of production lines, with sequential function chart method of software design analysis. To complete the software development by conversion between sequential function chart and software and ladder. Soft
8、ware implementation of the tobacco stems pretreatment production line automatic control system design, and to achieve overload protection, automatic alarm functions, information recording and so on. The final system design to package automatically, automatic unpacking, weighing tobacco stems online,
9、 online sorting cleaning, tobacco stems and humidity control functions.Keywords：Pretreatment of tobacco stems； Automatic control； PLC； System Design目目 录录 1 绪论.1 1.1 烟草行业现状.1 1.2 烟草发展历史.2 1.3 烟草生产自动化要求.3 1.4 烟草生产自动化意义.4 2 烟草加工工艺.6 2.1 原料周转、备料及叶组配方 .6 2.2 制丝工艺.6 2.2.1 预回潮.7 2.2.2 制叶片工艺.7 2.2.3 制叶丝工艺.7 2.2.4 制梗丝工艺.8 2.3 烟丝混合工艺.9 2.4 卷接包及滤棒成形.9 2.5 本章小结.10 3 烟梗预处理生产线简介.11 3.1 烟梗预处理过程存在问题 .
