紫外激光FPC切割软件的研究与开发  

Research and Application on UV Laser FPC Cutting Software

作　　者：吴浩[1] 胡兵[1] 曹三清 郑启光[1] 应花山[1] 汪传林 

机构地区：[1]华中科技大学光电子科学与工程学院,湖北武汉430074 [2]深圳光华激光技术有限公司,广东深圳518000

出　　处：《应用激光》2010年第6期508-514,共7页Applied Laser

摘　　要：搭建了紫外激光FPC(Flexible Printed Circuit)切割系统软件的整体框架结构。该切割软件突出之处在于采用振镜和工作台联合协调加工;切割过程中激光依靠受计算机控制的两个振镜实现激光的高速扫描;通过可补偿聚焦误差的聚焦镜将光束聚焦到工件表面,实现高速切割,充分发挥紫外激光的"冷"加工特性。软件通过Gerber文件获取切割路径,然后对切割路径网格化,每一个网格为一个加工单元,加工单元的大小由振镜幅面大小控制,通过移动工作台依次逐块进行加工从而完成整张FPC的切割加工。由于振镜自身的畸变误差(如枕型和桶形畸变等)以及加工过程中网格块的变换,使得如何处理好各种误差补偿是软件发开的关键技术之一;FPC生产工艺复杂,所用的材料容易产生变形;而且不同的部位由于材料不同造成变形不均匀,极大的影响切割精度,软件通过摄像机获取板材上的定位点,通过该定位点与基于射影变换的定位方法完成自动定位与变形校正。最后在Visual C++6.0环境下开发了上述所有功能模块。实践结果表明本软件系统切割速度快,定位精度高;满足了当前FPC切割加工所需要的主要功能,软件操作简单,界面良好,具有较大的应用价值。This paper introduces the integrated framework of UV laser FPC cutting system. The biggest advantage of this software lies in that it is designed to control the processing by galvanometer coordinating with the working table. In the cutting process, high-speed scanning by laser is dcpcndent on the functioning of two galvanometers controlled by the computer, Laser beam is focused on the surface of working pieces by the focus lens that can compensate the focus error. The focused laser beam then completes high-speed cutting. This fully presents the ＂cold＂ processing property of UV laser. The software gets access to the cutting path by way of Gerber file. The cutting path is then reticulated. Each grid is defined as a processing unit, the scope of which is controlled by the galvanometer field. As the working table moves, the processing of units is completed one by one. Due to distortion error such as pillow shaped and bucket shaped distortions of the galvanometer itself and conversion of grids, how to realize seamless joint between grids becomes one of the key technologies in software development. Production of FPC is a complex process because the material applied is easy to distort. Uneven distortion of different parts that apply different materials has a great impact on cutting accuracy. This software is designed to obtain the anchor point on the plate by camera. Relying on this anchor point and positioning method based on projective transformation, automatic positioning and distortion regulating can be completed. All the above function modules are designed in the framework of Visual C＋＋ 6.0. The experimental results show that this software displays fast cutting speed and high positioning accuracy, meets all the necessary functions for current FPC cutting processing, is easy for operation with good interface and great value.

关 键 词：紫外激光 软件开发 FPC激光切割 Gerber文件解析 摄像机定位 

分 类 号：TN[电子电信]