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罗俊 《现代制造技术与装备》2014,(1):22-23,36
本文针对阀门的缝隙焊接进行分析,介绍了焊接工艺的选择原则,分析了自动焊接系统的总体设计、焊接设备的组成及自动焊接设备的控制系统,介绍了PLC的工作流程,给出了自动焊接控制系统的流程及PLC工作代码。 相似文献
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主要分析了自动焊接技术对我国机械焊接行业发展的推动作用、自动焊接设备的优势及其应用现状,并对自动焊接技术的发展前景作了简单的预测。 相似文献
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焊接自动化在石油石化装备厂内制造焊接、现场安装焊接,以及维、抢修焊接中发挥着重要作用,本文对钻杆摩擦焊机、螺旋管预精焊生产线、管道预制焊接线、压力容器自动焊接专机、管道铺设自动焊接工作站、大型储罐自动焊接设备及管道维修焊接设备等石油石化行业重要的焊接自动化技术应用现状进行了介绍,指出了石油石化焊接自动化的发展趋势。 相似文献
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采用可编程控制器进行技术改造,将现有的普通焊接设备改造成逻辑顺序控制的自动化成套焊接设备,实现磁体的低成本自动化焊接生产。研制的自动控制系统具有软硬件设计合理、性能稳定、可靠性高、操作简单等优点,能够较好地实现磁体的自动焊接要求,并保证焊缝的质量,具有一定的实用价值。 相似文献
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针对通信铁塔塔靴拼装、焊接的工艺特点,研发了铁塔塔靴自动焊接系统。焊接设备通过取板机械手与变位机相互配合完成板料精确拼装,通过取板机械手、变位机、焊接机器人的联合作业,实现塔靴自动焊接,现场试用情况表明该自动焊接系统可自动拼装焊接多种型号的塔靴,且焊接效率高、焊接质量好。 相似文献
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闪光焊接是一种专用的焊接方法,有自动闪光焊接和非自动闪光焊接,大功率连续闪光焊接方法在船舶锚链的连环焊接中采用,一般采用自动闪光焊接.典型的焊接设备自动闪光焊接由液压伺服阀和电子控制系统组成,本文介绍了自动闪光焊接的控制组成,重点介绍了闪光焊接的预热闪光与连续闪光工艺过程及作用,为了提高大截面材料闪光焊接设备的可靠性与焊接控制精度,用Q系列PLC构成自动焊接控制系统,并给出了硬件配置、控制参数及程序编制方法.通过调试,系统控制实际精度满足工艺要求,运行可靠,具有实际使用价值. 相似文献
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介绍了一种铂、铱金火花塞自动焊接设备,该设备用于将细小的铂、铱金丝焊接在火花塞的点火端上,全自动、焊接质量稳定可靠。 相似文献
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Arc welding robot system with seam tracking and weld pool control based on passive vision 总被引:3,自引:3,他引:0
Hong-yuan Shen Jing Wu Tao Lin Shan-ben Chen 《The International Journal of Advanced Manufacturing Technology》2008,39(7-8):669-678
The automatic control in square-wave alternating current (AC) gas tungsten arc welding (GTAW) is significant for a “teach and playback” robot to overcome the variation of the seam trajectory and the seam gap in the welding process. This paper presents a welding robot system based on the real-time visual measurement in the different levels of the welding current. The primary objective is to measure the offset of the torch to the seam center and the size of seam gap by passive vision, track the seam and control the weld pool in real time. A novel visual image analysis algorithm was developed for seam tracking and seam gap measuring, free from robot calibration. The control algorithm based on the knowledge base was established to control the weld formation by regulating the welding current and wire feed rate. The welding practice for the rocket storage tank demonstrates the efficiency of the proposed system. 相似文献
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Wang KezhengChen XinzhengJia GaofengDepartment of Mechanical Engineering Tsinghua University Beijing China 《机械工程学报(英文版)》2004,17(1):78-81
An automatic seam tracking system used in submerged arc welding is presented. In the system, the linear CCD vision sensor is installed in front of the welding torch. Laser structure light emitted by the semiconductor laser irradiates on a slant to work-piece surface and forms a structure light strip on work-piece surface. Scatter light of the strip is received by linear CCD on top of the seam and the image information of seam can be obtained. By way of image processing and applying Fuzzy-P controller in tracking process, automatic seam tracking has been realized accurately. Anti-disturbing ability of the system to work-piece surface status has been enhanced largely by classified microadjus-tment of torch height. 相似文献
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H.-S. Moon R. J. Beattie 《The International Journal of Advanced Manufacturing Technology》2002,19(12):867-872
A significant portion of the total manufacturing time for a pipe fabrication process is spent on the welding following the
primary machining and fit-up processes. To achieve a reliable weld bead appearance, automatic seam tracking and adaptive control
to fill the groove are urgently required. For seam tracking in the welding processes, vision sensors have been successfully
applied. However, the adaptive filling control for a multitorch system for the appropriate welded area has not yet been implemented
in the area of submerged arc welding (SAW).
This paper describes several advances in sensor and process control techniques for applications in SAW which combine to give
a fully automatic system capable of controlling and adapting the overall welding process. This technology has been used in
longitudinal and spiral pipe mills and in pressure vessel production. 相似文献
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为解决液力变矩器在焊接过程中焊件变形、焊件同轴度较差、焊接效率不高的问题,论文设计以PLC为控制核心自动控制系统,配以机械装置组成自动环缝焊机.通过实践中应用证明,此环缝焊机比传统焊接具有更高的焊接稳定性、更好的焊接质量、较高的焊接质量,具有广泛的推广价值. 相似文献
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图像的标定就是确定世界坐标系和图像坐标系的几何关系。在透视光变换模型的基础上,运用非线性方程组参数估计中的牛顿法对焊接模型进行了重新标定。通过对非线性估计法实验数据的分析可以看出,当图像有干扰时,标定的参数值能够最大限度地接近真实值,用估计法求解降低了传统标定过程中因过参数化而导致的求解结果误差较大的问题,为进一步的自动焊缝跟踪提供了准确的焊缝尺寸信息。 相似文献
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焊缝质量自动检测是实现焊接自动化的关键技术。文中在分析结构光视觉检测原理的基础上,建立了基于结构光视觉的激光拼焊焊缝质量检测系统并对检测系统的图像处理方法进行了研究。对原始图像进行了开窗处理和中值滤波,并使用迭代阈值法获得了结构光光纹。提出了一种简化的模板获得了光纹的边界点并使用几何中心法提取了光纹中心线。使用平均斜率法识别出光纹中心线的特征点。分析了激光拼焊焊缝截面轮廓的特点并建立了截面轮廓几何参数计算方法。实验结果表明该检测系统可以完成焊缝截面轮廓相关参数的计算。 相似文献