摘 要
随着国内饮料市场的持续扩张与消费者对产品质量要求的提升，国产饮料瓶生产行业正面临自动化升级的迫切需求。传统生产模式因效率低、精度不足等问题，已难以满足现代化生产标准。为此，本文聚焦于基于PLC（可编程逻辑控制器）的小型自动化分生产线控制系统设计，以三菱FX2N-32MR PLC为核心，针对饮料瓶自动吹塑单元提出一套完整的软硬件解决方案。
硬件设计方面，系统详细规划了PLC的外部电路布局，包括电源电路、输入输出（I/O）模块接线及传感器与执行器的接口设计，确保硬件组件的稳定性和抗干扰能力。软件部分则采用模块化编程思想，通过梯形图（LAD）实现吹塑工艺的精确控制，涵盖温度调节、压力监测、模具动作等关键环节，并设计故障诊断与报警功能以提升系统可靠性。
本设计通过仿真验证与现场调试，实现了生产效率提升20%以上、产品合格率稳定在99.5%的目标，显著降低了人工干预需求与能耗成本。研究成果不仅为国产饮料瓶生产线提供了可复制的自动化改造方案，也为PLC在轻工业领域的推广应用提供了技术参考，对推动我国工业自动化水平提升具有积极意义。
关键词：国产饮料瓶；自动吹塑；PLC控制系统；FX2N-32MR；模块化设计；生产效率
ABSTRACT
With the continuous expansion of the domestic beverage market and increasing consumer demand for product quality, the automation upgrade of China’s beverage bottle production industry has become an urgent necessity. Traditional production methods, characterized by low efficiency and insufficient precision, struggle to meet modern manufacturing standards. This paper focuses on the design of a small-scale automated sub-production line control system based on PLC (Programmable Logic Controller), proposing a comprehensive hardware-software solution for the automatic blowing unit of beverage bottles using Mitsubishi FX2N-32MR PLC as the core component.
In hardware design, the system meticulously plans the external circuit layout of the PLC, including power supply circuits, input/output (I/O) module wiring, and interface designs for sensors and actuators, ensuring stability and anti-interference capabilities. The software adopts a modular programming approach, implementing precise control of the blowing process through ladder diagrams (LAD), covering key aspects such as temperature regulation, pressure monitoring, and mold operations. Fault diagnosis and alarm functions are also integrated to enhance system reliability.
Through simulation validation and field debugging, the design achieves over 20% improvement in production efficiency and maintains a product qualification rate of 99.5%, significantly reducing manual intervention and energy consumption costs. The research findings not only provide a replicable automation solution for domestic beverage bottle production lines but also offer technical references for the broader application of PLCs in light industries, contributing positively to the advancement of China’s industrial automation level.
Keywords: Domestic Beverage Bottles; Automatic Blowing; PLC Control System; FX2N-32MR; Modular Design; Production Efficiency
目 录
1 绪论 1
1.1研究背景及意义 1
1.2研究现状 2
1.2.1 可编程序逻辑控制器 3
1.2.2 我国自动吹塑存在的问题 3
1.3研究主要内容 4
2 小型自动化分生产线控制系统总体设计 6
2.1任务的分析 6
2.2硬件方案设计 6
2.3软件方案设计 7
2.3.1经验设计法 7
2.3.2逻辑设计法 8
3 元件器件选择 10
3.1 PLC控制要求和内容及选型 10
3.1.1基础PLC 10
3.1.2可编程控制器的特点 10
3.1.3 PLC的安装与接线 11
3.1.4设计PLC控制时，应遵循以下基本原则 11
3.1.5 PLC的工作原理 12
3.1.6 PLC选型与硬件配置 13
3.1.7 PLC的性能指标 13
3.2电动机的选型 14
3.3接触器的选型 14
3.4热继电器的选型 15
3.5开关电器、熔断器的选型 15
3.6传感器的选型 15
4 硬件电路设计 17
4.1系统硬件结构框图 17
4.2主电路的设计 17
4.3控制电路的设计 17
4.4操作面板的设计 18
5 软件程序设计 20
5.1控制要求和控制过程分析 20
5.1.1 I/O端口分配 20
5.1.2梯形图 21
5.1.3初始化程序 21
5.1.4装箱选择程序 22
5.1.5流水线主控程序 24
5.1.6闪烁报警程序 25
5.1.7记数程序 25
5.1.8数据传送程序 26
6 程序仿真调试 28
6.1装箱选择程序仿真 28
6.2主控制程序的仿真 28
6.3闪烁报警程序的仿真 31
6.4记数程序的仿真 32
总 结 33
参考文献 34
致 谢 35
