基于PLC与伺服的枕式包装机电子凸轮特性设计
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摘要
目的分析枕式包装机横封旋转轴的运动特点和规律,提出一种基于PLC、伺服放大器和伺服电机的电子凸轮系统,用于代替现有凸轮机械结构。方法研究枕式包装机横封轴的机械结构和运动轨迹,采用物理建模法建立运动模型,重点论述电子凸轮的运动过程、模型建立和关键参数的求取。结果与传统高阶次数学模型相比,该模型简单且易于编程实现,同时提高了横封旋转轴运动过程中不同时间点速度的可控性,实现了柔性变速旋转。结论解决了因机械凸轮长期磨损造成精度损失而导致裁剪效果、包装精度变差等问题,从而提高了包装精度,增加了横封切刀的寿命,减小了设备机械振动。
The work aims to analyze the movement characteristics and rules of the transverse sealing rotation shaft of pillow packer, and put forward an electronic cam system based on PLC, servo amplifier and servo motor, which is used to replace the existing cam mechanical structure. The mechanical structure and motion track of the transverse sealing shaft of the pillow packer were studied, and the motion model was established in the physical modeling method. The motion process, the model establishment and solution to key parameters of the electronic cam were emphatically discussed. Compared with the traditional high order sub mathematical model, the model was simple and easy to program. Meanwhile, it improved the controllability of the speed at different time points in the course of motion of the transverse sealing rotation shaft, and realized the flexible variable speed rotation. The model solves the problems of worsened cutting effect and packaging accuracy due to the loss of accuracy caused by the long-term wear of the mechanical cam. Thus, the packaging accuracy is improved, the service life of the transverse sealing cutter is increased, and the mechanical vibration of the equipment is reduced.
The work aims to analyze the movement characteristics and rules of the transverse sealing rotation shaft of pillow packer, and put forward an electronic cam system based on PLC, servo amplifier and servo motor, which is used to replace the existing cam mechanical structure. The mechanical structure and motion track of the transverse sealing shaft of the pillow packer were studied, and the motion model was established in the physical modeling method. The motion process, the model establishment and solution to key parameters of the electronic cam were emphatically discussed. Compared with the traditional high order sub mathematical model, the model was simple and easy to program. Meanwhile, it improved the controllability of the speed at different time points in the course of motion of the transverse sealing rotation shaft, and realized the flexible variable speed rotation. The model solves the problems of worsened cutting effect and packaging accuracy due to the loss of accuracy caused by the long-term wear of the mechanical cam. Thus, the packaging accuracy is improved, the service life of the transverse sealing cutter is increased, and the mechanical vibration of the equipment is reduced.
引文
[1]赵燕,陈秋霞,文凯.枕式包装机控制系统设计[J].包装与食品机械,2015,33(2):42—45.ZHAO Yan,CHEN Qiu-xia,WEN Kai.Design of Control System for Pillow Type Packaging Machine[J].Packaging and Food Machinery,2015,33(2):42—45.
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[12]赖宋红.电子凸轮控制技术的应用[J].仪器仪表用户,2014(6):84—85.LAI Song-hong.Application of Electronic CAM Control Technology[J].Instruments and Meters,Users,2014(6):84—85.
[13]WU X,HUANG X H,HUANG W G,et al.The Working Methods of the Servo Cam Grinder and Its Accuracy Compensation Strategy[J].Advanced Materials Research,2012,1898(542):1176—1181.
[14]王程,贺炜.凸轮机构CAD/CAM研究的回顾与展望[J].机械传动,2008,32(6):119—121.WANG Cheng,HE Wei.Review and Prospect of CAD/CAM Research on CAM Mechanism[J].Mechanical Transmission,2008,32(6):119—121.
[15]董伟良.凸轮的变异研究和电子凸轮发展[J].上海应用技术学院学报(自然科学版),2004,4(3):190—194.DONG Wei-liang.Study on Variation of CAM and Development of Electronic CAM[J].Journal of Shanghai Institute of Technology(Natural Science Edition),2004,4(3):190—194.
[2]唐善华,仲淇生.枕式包装机横切机构的传动问题分析及对策[J].食品与机械,2003(3):27—28.TANG Shan-hua,ZHONG Qi-sheng.Pillow Packaging Machine and Cutting Device of Transmission Problem Analysis and Countermeasure of[J].Food and Machinery,2003(3):27—28.
[3]刘丽兰,刘宏昭,吴子英,等.机械系统中摩擦模型的研究进展[J].力学进展,2008,38(2):201—213.LIU Li-lan,LIU Hong-zhao,WU Zi-ying,et al.Progress in The Study of Friction Models in Mechanical Systems[J].Advances in Mechanics,2008,38(2):201—213.
[4]卫光,郭坤.三伺服枕式包装机电子凸轮控制系统的研究与应用[J].包装与食品机械,2012,30(6):57—59.WEI Guang,GUO Kun.Research and Application of Electronic CAM Control System for Three Servo Pillow Packaging Machine[J].Packaging and Food Machinery,2012,30(6):57—59.
[5]曾斌,韩志彬.基于伺服直线电机的无机械凸轮的研究[J].电子制作,2013(24):29.ZENG Bin,HAN Zhi-bin.Research on Non Mechanical CAM Based on Servo Linear Motor[J].Electronic Manufacture,2013(24):29.
[6]裴静,尹曙辉.机械凸轮开关的电子化改造[J].科技经济导刊,2016(28):74.PEI Jing,YIN Shu-hui.Technology Economic Transformation of Electronic Mechanical[J].CAM Switch,2016(28):74.
[7]王兆义,杨新志.三菱FX3U系列PLC技术特点[J].电世界,2007,48(9):1—3.WANG Zhao-yi,YANG Xin-zhi.MITSUBISHI FX3U Series PLC Technical Features[J].Electric World,2007,48(9):1—3.
[8]林瑶瑶,仲崇权.伺服驱动器转速控制技术[J].电气传动,2014,44(3):21—26.LIN Yao-yao,ZHONG Chong-quan.Servo Drive Speed Control of Electric Transmission Technology[J].2014,44(3):21—26.
[9]SARAVANAKUMAR D,MOHAN B,MUTHURAMALINGAM T.A Review on Recent Research Trends in Servo Pneumatic Positioning Systems[J].Precision Engineering,2017,49:481—492.
[10]柴敬,袁强,汪志力,等.物理模型试验方法的应用分析[J].西安科技大学学报,2013,34(5):505—511.CHAI Jing,YUAN Qiang,WANG Zhi-li,et al.Application Analysis of Physical Model Test Method[J].Journal of Xi'an University of Science and Technology,2013,34(5):505—511.
[11]PENG Bi,GONG Shi-hua,HUANG Yu,et al.Research on Tension Control of Winding Systems Using Electronic CAM[J].Advanced Materials Research,2012,2075(590):272—278.
[12]赖宋红.电子凸轮控制技术的应用[J].仪器仪表用户,2014(6):84—85.LAI Song-hong.Application of Electronic CAM Control Technology[J].Instruments and Meters,Users,2014(6):84—85.
[13]WU X,HUANG X H,HUANG W G,et al.The Working Methods of the Servo Cam Grinder and Its Accuracy Compensation Strategy[J].Advanced Materials Research,2012,1898(542):1176—1181.
[14]王程,贺炜.凸轮机构CAD/CAM研究的回顾与展望[J].机械传动,2008,32(6):119—121.WANG Cheng,HE Wei.Review and Prospect of CAD/CAM Research on CAM Mechanism[J].Mechanical Transmission,2008,32(6):119—121.
[15]董伟良.凸轮的变异研究和电子凸轮发展[J].上海应用技术学院学报(自然科学版),2004,4(3):190—194.DONG Wei-liang.Study on Variation of CAM and Development of Electronic CAM[J].Journal of Shanghai Institute of Technology(Natural Science Edition),2004,4(3):190—194.