PCB专用字符喷绘机关键技术的研究

发布时间：2018-05-05 02:15

本文选题：PCB + 字符喷印　；参考：《西华大学》2015年硕士论文

【摘要】：传统的PCB板生产在丝网印刷过程中需要大量时间和工序,随着当今电子产品的不断发展,传统丝网印刷方式已经很难满足生产要求。字符喷印技术作为一种快速发展的图像输出技术,尤其在缩短生产周期、提高生产精度、降低生产成本以及减少环境污染等方面都有着许多的优势,逐渐成为未来PCB板制作的主流方式。论文在分析了传统PCB板丝网印刷的方式以后,对字符喷绘中涉及到的喷头工作原理、喷绘机工作流程以及目前已有字符喷绘机进行了分析,给出了具体的喷绘机结构,重点研究了PCB字符喷绘机设计过程中的关键技术。PCB字符喷绘机设计过程中关键技术包括:Gerber文件解析、PCB板视觉定位以及喷头驱动控制和电机伺服控制等部分。在Gerber文件解析部分,具体对Gerber文件的结构做了了解以及对其语法标准做了分析,进而给出解析流程,利用GDI+实现图像的输出。然后在PCB板视觉定位中,分析了视觉定位相比传统定位方式的优势,就如何提高PCB定位精度和定位速度作了深入研究,提出了一种简单的定位方式。最后,在PCB喷绘控制系统中,充分利用了FPGA的优势,采用自顶向下的设计方式,结合具体设计电路,介绍了控制系统的设计构架和系统组成,以及完成了硬件部分和相关电路的设计。
[Abstract]:The traditional PCB plate production needs a lot of time and working procedure in the screen printing process. With the development of electronic products, the traditional screen printing method has been very difficult to meet the production requirements. As a rapidly developing image output technology, character printing technology has many advantages, especially in shortening production cycle, improving production precision, reducing production cost and reducing environmental pollution. Gradually become the mainstream way of PCB board production in the future. After analyzing the traditional PCB screen printing method, the paper analyzes the working principle of the nozzle, the workflow of the inkjet machine and the existing character inkjet machine, and gives the concrete structure of the inkjet machine. The key technology in the design process of PCB character inkjet machine is mainly studied. The key technologies in the design process include the visual positioning of the PCB board based on the analysis of the PCB file, the driving control of the sprinkler head and the motor servo control and so on. In the part of Gerber file parsing, the structure of Gerber file is understood and its syntax standard is analyzed, then the parsing flow is given, and the output of image is realized by GDI. Then, in the visual positioning of PCB board, the advantages of visual positioning compared with traditional positioning methods are analyzed, and how to improve the positioning accuracy and speed of PCB is deeply studied, and a simple positioning method is proposed. Finally, in the PCB inkjet control system, the advantages of FPGA are fully utilized, the top-down design method is adopted, and the design framework and system composition of the control system are introduced in combination with the specific design circuit. And completed the hardware part and related circuit design.
【学位授予单位】：西华大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN41

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