【作者】 褚晓珂；

【导师】 黄颖为； 赵庆海；

【作者基本信息】 西安理工大学 ， 食品科学， 2007， 硕士

【摘要】 目前,我国印刷行业中印刷机的进口额明显大于出口额,这反映了国产印刷机与国际六大知名品牌的印刷机相比综合性能较差。造成这一现象的主要是因为国产印刷机在经过一段时间的使用后,其内部某些部件之间就会产生有害振动,这种振动严重影响了印品质量、降低了印刷效率并缩短了印刷机的使用寿命。要想消除印刷机印刷过程中的有害振动,就必须先正确认识这些振动情况。本文从实验的角度出发,以国产胶印机为研究对象,以采样并分析该国产胶印机中的振动信号为研究目的,设计并开发了胶印机振动测试系统。文章的主要内容分为三个方面:首先介绍了搭建胶印机振动测试系统所需掌握的基础理论。其次详细介绍了搭建该测试系统中的硬件设备、采样软件和分析软件三部分所需的原理和方法。最后,使用该测试系统采样了胶印机中的振动信号,并通过组合分析和单组分析两种分析方法,对实测数据进行了分析。通过组合分析,比较了胶印机整机与递纸滚筒部件的振动情况;通过单组分析,分离出了该组主要振动频率的信号。本文最后根据实验数据的分析结果,总结归纳了实验中所选国产胶印机的操作速度范围及造成其内部振动的主要振源,进而验证了该测试系统的可行性,为研究胶印机的振动性能提供了一种实验手段。更多还原

【Abstract】 Nowadays in the nation printing industry, printing machine’s imports are much more than its exports. It shows that the general performances of homemade printing machine, relative to the world’s six leading nameplates, are worse than theirs. The main reason is that the inside parts of some homemade printing machines will be bad vibrations after them are used with period of time. The quality of the presswork , the efficiency of the printing and the time of the use will be badly effected by the vibrations. We should find out the bad vibrations on the priting machine before we want to avoid them.With an eye to experiment, on the purpose of the sampling and analysis the vibrations of homemade offset machine, I design and empolder the testing system of offset machine. This article has three parts. Firstly, introduce the basic knowledge and how to bulid the testing system. Secondly, talk about the three parts of the testing system in deail, hardware, sampling software and analysis softwar, with the thesis and methods. Lastly, use the testing system to sample the signals of vibration of the homenade offset machine and analyse those datas with two methods.Through the several-group analysis, I compare the vibrant circs of the whole machine with the sending roller. Through the single-group analysis, I filter the vibration signal which is main frequency. In the end of the thesis I sum up the seemly operation speed of this offset machine and analyse the main reason which causes the vibration. The testing system has been proved right with the result of an experiment. This method offers a effective experiment mean which can help to research the offset machine’s vibrant performance.更多还原