导　　师： 史步海

学科专业： 081101

授予学位： 硕士

作　　者： ;

机构地区： 华南理工大学

摘　　要： 折弯机是钣金行业中的一种精密加工设备，它采用成套模具在冷态下将金属板料折制成一定角度，已在众多领域得到广泛应用。随着用户对加工精度与能耗要求的提高，传统液压式折弯机因其固有缺点已不能满足要求，使用伺服电机直接驱动的全电动折弯机成为该类设备新的发展方向。辅以实时多任务数控系统，折弯机在提高运动控制性能的同时，大幅提升与其它设备的互联互通能力，使其作为一个节点参与到整个生产加工过程的设计与数据交换中，提高智能化与网络化程度。 本课题在综合研究国内外数控折弯机发展现状与市场需求的基础上，提出一种基于开放式数控系统的全电动折弯机总体设计方案，重点进行电气控制部分的硬件设计与数控系统的软件设计，并对相关折弯控制技术作进一步深入研究。该方案具有响应快、精度高、环保节能等优点的同时，还具有操作简便、性价比高的特点。 本课题研究的主要工作内容如下： 1、根据国内外研究现状与市场需求，制定系统总体设计方案，提出4轴同步驱动滑块的方法，并对各数控轴功能、传动机构设计及具体控制方式作了说明； 2、提出电气控制部分硬件设计框架，对电源、工业控制计算机、运动控制板卡与安全保护装置的设计及工作原理进行详细分析； 3、采用实时多任务Linux操作系统与EMC2.4.3数控系统搭建软件平台，并详细分析其软件架构与工作原理，采用Tcl//Tk语言进行操作界面设计，并对系统进行定制； 4、设计基于偏差耦合结构的4轴伺服电机位置同步控制算法，并结合模糊PID控制策略，实现Y轴方向的运动与同步性能要求，并进行实机测试； 5、在研究金属板料弹性形变特性的基础上，针对角度编程技术，设计基于经验公式与LMBP神经网络的折弯回弹补偿预测算法，并进行仿真试验。 Press brake is a kind of precision sheet metal processing equipment, which is widelyused in many fields. It uses complete sets of moulds to bend sheet metal into certain angle innormal temperature. As the users’ increasing requirements of machining accuracy and energyconsumption, the traditional hydraulic press brake can’t meet these for its inherent defect.All-electric press brake directly driven by servo motor becomes the new developmentdirection in this field. Supported by real-time multitasking CNC system, press brake canincrease motion control performance and improve the ability of interconnection to otherequipments significantly. It can art as a node participate design and data exchange of thewhole production process, what can improve intelligent and networking degree. According to comprehensive research on domestic and foreign CNC press brakedevelopment situation and market demand, this project proposes an all-electric press brakeoverall design scheme based on open CNC system. The hardware design of electrical controlpart and software design of CNC system are the key contents; further research on relativebending control technology is done at the same time. This scheme has following advantages:fast response, high precision, environmental protection and energy saving. It’s simple andeasy for operator and has cost effective advantage. The main contents of this project are as follows. 1. According to domestic and foreign research situation and market demand, formulatethe whole system design scheme, propose using4motors to drive slider synchronously, andexplain the function of all axes, transmission mechanism design and specific control methods; 2. Put forward the hardware design framework of electrical control part, and do detailedanalysis on working principle of power supply subsystem, industrial control computer, motioncontrol card and safety protection device; 3. Real-time multitasking Linux operating system and EMC2.4.3CNC system are usedto build the software platform, its software architecture and working principle is analysesdetailedly; Tcl//Tk language is used to design operation interface, and do system customizationby configuration scripts; 4. Design relative coupling synchronization control structure of4servo motors,combining fuzzy PID control strategy to achieve the Y axis movement and synchronizationperformance requirements, and do actual test on sample machine; 5. According to sheet metal elastic deformation characteristics, aim at angleprogramming technique, design bending springback compensation prediction algorithm basedon empirical formula and LMBP neural network, and do simulation experiment.

关 键 词： 全电动折弯机 数控系统 界面设计 同步控制 折弯回弹补偿

分 类 号： [TP273]

领　　域： [自动化与计算机技术] [自动化与计算机技术]