PCB刀具磨床数控系统设计与实现

发布时间：2018-06-06 08:05

本文选题：Soft型开放式数控系统 + 结构化　；参考：《电子科技大学》2013年硕士论文

【摘要】：当前的数控系统研究，已经经历了由封闭式向开放式结构发展的过程。市场需求总是不断更新，为了跟上市场需求步伐，，而进行开放式数控系统的按需求的二次开发，是目前开发应用数控技术的一个重点。二次开发可以实现知识产权自主化，要把PCB刀具磨床专用的数控功能模块集成到数控系统中去，就必须进行利用现有的数控系统进行二次开发。本课题选取了一种以工业PC机为基础，以德国BECKHOFF公司的Soft型开放式数控系统TwinCAT NCI为控制开发平台，加拿大Dragonfly软件为服务平台嵌入Visual Basic6.0开发的VBScript实现人机操作界面，PCB五轴三联动刀具数控磨床为设计对象。通过对该设计对象开发的背景以及国内外磨床行业产品的发展现状的分析，进而得出项目需要解决的主要开发问题以及应该达到的设计目标。采用结构化分析（SA）方法，对数控系统进行了需求分析，并采用结构化设计（SD）的编程方法对HMI操作、PLC逻辑控制、NCI运动控制各功能模块进行了系统设计和代码实现，实现了PCB刀具磨床数控系统。通过TwinCAT NCI中的PLC程序和CNC程序实现数控磨床的逻辑控制和插补曲线及机械手自动上下料的运动控制，通过BECKHOFF的开放式实时以太网EtherCAT与I/O模块和全数字伺服通讯，完成数控磨床的实际动作，并结合机械部分进行了整个磨床数控系统的运行及刀具加工。本数控系统把PCB磨床特有的功能模块集成到了BECKHOFF数控系统中，在Windows XP环境下运行，易于操作。并在厦门金鹭特种合金有限公司PCB生产车间得到应有，生产的PCB刀具圆度误差小于1um，跳动误差小于5um，螺旋角误差小于0.5°，沟长误差小于10um。达到国际先进水平，具有较高的精度、生产效率以及较好的刀具加工稳定性。为使数控系统的通用性、可移植性得到增强，有利于系统后期使用的功能扩展，该数控系统软件采用模块化结构设计。
[Abstract]:The research of CNC system has gone through the process of development from closed to open structure. In order to keep up with the pace of market demand, the secondary development of open CNC system according to demand is a key point in the development and application of NC technology at present. The secondary development can realize the independence of intellectual property rights. In order to integrate the special NC function module of the PCB tool grinder into the NC system, it is necessary to make use of the existing NC system to carry on the secondary development. In this paper, a kind of Soft open CNC system (TwinCAT NCI), which is based on industrial PC and developed by BECKHOFF Company of Germany, is selected as the control development platform. VBScript developed by embedding Visual Basic6.0 into Canada's Dragonfly software the man-machine interface (HCI) is designed for CNC grinder with five-axis and three-axis tools. Through the analysis of the background of the design object development and the development status of the grinding machine industry at home and abroad, the main problems to be solved and the design goals to be achieved are obtained. In this paper, the requirements of numerical control system are analyzed by using the method of structured analysis (SA), and the system design and code implementation of each function module of HMI logic control are carried out by using the method of structured design and SDD. The NC system of PCB tool grinder is realized. The logic control and interpolation curve of NC grinder and the motion control of manipulator automatic loading and unloading are realized by PLC program and CNC program in TwinCAT NCI. The I / O module and full digital servo communication are realized through BECKHOFF's open real-time Ethernet EtherCAT. The actual operation of the CNC grinder is completed, and the operation of the CNC system of the grinder and the machining of the cutting tools are carried out in combination with the mechanical part. The CNC system integrates the special function module of PCB grinder into BECKHOFF NC system, runs in Windows XP environment and is easy to operate. In the PCB workshop of Xiamen Jinlu Special Alloy Co., Ltd, the roundness error, runout error, helical angle error and channel length error of the PCB cutter are less than 1 um. less than 5 ums, 0.5 掳and 10 um. respectively. International advanced level, with high accuracy, production efficiency and good tool processing stability. In order to enhance the versatility and portability of the CNC system and to expand the function of the system in the later stage, the software of the CNC system is designed with a modular structure.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TG596

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