双动力驱动枕形包装机控制系统设计与研究

发布时间：2019-04-02 12:46

【摘要】：枕形包装机是一种通过使用挠性包装材料对产品进行三面封口的包装设备，在食品、医药、生活用品等领域得到了广泛应用。枕形包装机的控制系统程度决定其自动化发展水平，因而深入研究枕形包装机的控制系统，对实现枕形包装机可靠控制、简便操作、更高的智能化水平、更广泛的应用领域是很有必要的。通过分析枕形包装机的生产工艺要求，提出了基于PLC的电气控制方案：双动力驱动控制系统，并结合软、硬件进行研究并加以实现，从而满足了针对枕形包装机提出的要求：①包装能力可连续调节，②一定范围内包装袋长可连续调节，③包装袋长实时显示，④切断包装袋时，确保图案的完整性。本文所设计的控制系统，能实现色标追踪补偿、袋长实时显示、生产能力可调、热封温度可控等控制要求：利用编码器、光电开关和触摸屏等设备，实时显示制袋袋长；利用变频调速原理，，实现包装能力连续可调；选用智能温控仪表来控制温度，精度得到很大提高；接着提出了一种色标追踪策略，更加准确可靠地实现了追踪补偿，确保切断包装袋时的色标图案完整。对PLC与个人计算机、触摸屏、伺服驱动器等硬件间的通信连接、格式和参数进行设置，并编写了PLC控制程序，制作了相应的触摸屏控制画面。最后，在实验室条件下进行系统调试，对变频调速以及色标追踪进行测试，实现主电机连续调速控制以及伺服电机色标追踪补偿控制。
[Abstract]:Pillow packing machine is a kind of packaging equipment which uses flexible packaging materials to seal products on three sides. It has been widely used in the fields of food, medicine, household products and so on. The level of control system of pillow packing machine determines its automation development level. Therefore, a thorough study on the control system of pillow packing machine can achieve reliable control, simple operation and higher intelligent level of pillow packing machine. A wider range of applications is necessary. Based on the analysis of the production process requirements of pillow packing machine, the electric control scheme based on PLC is put forward: dual power drive control system, and it is researched and realized in combination with software and hardware. Thus the requirements of pillow packing machine are satisfied: 1 continuous adjustment of packing capacity, 2 continuous adjustment of packing bag length within a certain range, 3 real-time display of packing bag length, and 4 ensuring the integrity of the pattern when the packing bag is cut off. The control system designed in this paper can realize color tracking compensation, real-time display of bag length, adjustable production capacity, controllable heat seal temperature and other control requirements: using encoder, photoelectric switch and touch screen equipment, the bag length can be displayed in real time; By using the principle of variable frequency speed regulation, the packaging ability can be adjusted continuously, and the precision is greatly improved by selecting intelligent temperature control instrument to control the temperature. Then a color label tracking strategy is proposed to realize the tracking compensation more accurately and reliably so as to ensure the integrity of the color label pattern when the bag is cut off. The communication connection, format and parameters between PLC and personal computer, touch screen, servo driver and so on are set, and the PLC control program is programmed, and the corresponding touch screen control screen is made. Finally, the system is debugged under the laboratory condition, and the frequency conversion and color tracking are tested to realize the continuous speed control of the main motor and the compensation control of the color tracking of the servo motor.
【学位授予单位】：武汉轻工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP273;TB486

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