共查询到19条相似文献,搜索用时 203 毫秒
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由于液压油缸外缸筒在对焊前已镗孔,内孔精度很高,表面质量好,而外表面却不加工,属毛坯面,设计以内孔为定位基准的工装和焊接止口、坡口,使缸筒合件在旋转中自动对中,定位精度高,无需点焊。根据油管接头与缸筒马鞍形焊缝的数学模型,设计自动焊机,关键是控制焊枪的转动和移动,并在焊接马鞍形环焊缝时作变位和插补,实现自动跟踪控制,焊缝成形好。结果表明:焊接工程液压油缸外缸筒,设计以内孔定位的焊接工装和马鞍形自动焊接机,焊接质量好、效率高,焊缝整齐、均匀、美观。 相似文献
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针对接管、筒体的正交马鞍形曲线焊接,为了定量分析五轴联动马鞍形焊接系统(θr,,h,α,β)简化为四轴联动系统(θr,,h,β)的焊枪姿态误差,建立了马鞍形焊接运动系统的数学模型,运用空间解析几何原理推导出了简化后的焊枪前后倾角的误差公式。利用Matlab进行作图分析,得到了最大焊枪前后倾角与接管、筒体筒径比以及焊枪旋转角度之间的关系曲线。结果表明,正交马鞍形曲线焊接时,焊枪旋转角度和筒径比对最大的枪姿误差有直接影响,可为生产中合理选用四轴联动马鞍形焊接系统提供参考。 相似文献
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对筒体法兰焊接坡口加工的专用机床进行研究,就筒体加工马鞍形焊接坡口孔的特点,对坡口曲 面进行了深入分析,设计了一种适合筒体加工平面坡口及马鞍形焊接坡口的镗削加工装置.为筒体焊接法兰时使用自动化焊接设备提供了较理想的坡口结构. 相似文献
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对于像马鞍形这样复杂的空间曲线焊缝,一般采用手工方式进行焊接,焊后一致性差,废品率高,对工人技术水平要求也较高。随着工业自动化程度的发展,研制马鞍形空间曲线的自动焊接设备具有较大的实用价值。依据马鞍形焊缝的主要特点和焊接工艺,设计了基于三菱高性能PLC Q02H为主要控制中心,辅以焊机、SSCNETⅢ总线位置控制模块、伺服驱动器及电机、参数设置人机界面、自动焊接机架等单元构成的马鞍形自动焊接设备。经过试验,该系统自动化程度高、控制精度高、焊缝成型良好,在锅炉、石油管道、核电、造船与海洋工程等普遍存在马鞍形焊缝需求的行业中具有较高的实用价值。 相似文献
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介绍了大直径筒体马鞍形曲线自动切割机的结构、组成、工作原理以及设计的主要特点,分析了该切割机的运动精度。该机已成功地应用于锅炉筒体的自动切割生产中,并取得了良好的效果,是一种低成本的马鞍形曲线自动切割通用设备。 相似文献
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介绍了各种罐体椭圆形环焊缝全自动焊接系统的结构、组成和工作原理以及设计的主要特点。生产实践证明:该自动焊接系统在液体储罐的焊接生产应用中取得了良好的效果,是一种代成本自动化的椭圆形接缝专用焊接设备。 相似文献
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The characteristics of welding currents in a rotating arc lead tandem GMAW process and the weld-seam tracking
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Tandem gas metal arc welding (T-GMAW) process shows a high deposition rate that up to three times of the single electrode GMAW,so the welding speed could be significantly increased in this process.However,the majority of this process applications are based on the pre-programmed robotic welding,which does not allow them to track the seam real-time during welding.Rotating arc sensor,sensing the seam position by detecting the changing of welding currents,has been widely adopted in the automatic robot welding process.It is proposed in this paper to integrate the rotating arc sensor with a trailing torch to develop a new approach of rotating arc lead tandem gas metal arc welding (RLT-GMAW) process.The characteristics of the welding currents in the proposed new welding process were firstly studied,and then a self-turning fuzzy control seam tracking strategy was developed for the mobile robot automatic welding.The experimental results showed that the proposed RLT-GMAW process had an excellent seam tracking performance and high welding deposition rate.Even if there were some electromagnetic interactions between the two arcs,the deviation of the welding seam could also be reflected by the fluctuation of the welding currents on the leading arc once the correct welding parameters were selected.Based on the detected deviation,the welding tracking experiments showed that the proposed self-turning fuzzy controller had a good performance for the RLT-GMA W process seam tracking. 相似文献
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《Science & Technology of Welding & Joining》2013,18(3):271-277
AbstractManual underwater welding is usually time consuming, expensive and hard to perform because of the rigorous underwater environment. Automatic underwater welding can be performed faster at less cost and with higher quality. An automatic seam tracking system for underwater flux cored arc welding has been developed. It consists of a vision sensing module, a seam recognition module, a fuzzy controller (FC) and an X–Y travel platform. The vision sensing module can capture clear seam images during welding, successfully resolving the problem of welding arc interference during underwater flux cored arc welding. The seam recognition module filters, enhances and thresholds the seam images and then recognises the seam deviation angle with a three layer back propagation neural network. The FC outputs the control parameters according to the seam deviation angle and then controls the X–Y platform to drive the torch to the centre of the seam. In this study, three different welds were considered: a straight line, a kinked straight line and an S curved line. These welds were tracked real timely during underwater flux cored arc welding. The results show that this seam tracking system can meet the requirements of the automatic underwater flux cored arc welding. 相似文献
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全面分析了减震器储油缸两端端盖的焊接特点。论述了用电阻缝焊焊接减震器的主要技术问题,从热特性和电流分布的角度讨论了减小热变形和热影响区、降低分流系数k伍的意义和方法。比较电阻焊与弧焊在减震器焊接中的优劣。介绍FN—160S减震器专用自动缝焊机和焊接规范。 相似文献
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设计了一种基于旋转电弧传感的弯曲焊缝轮式移动焊接机器人机构,采用中间两轮差速驱动,前后对称布置一万向轮的结构,增加了机构的灵活性并降低了控制的难度;用两个直流伺服电机控制十字滑块实现左右与上下运动,采用旋转电弧传感器使焊枪与传感器一体,不仅结构紧凑,而且具有实时性。支撑焊枪的支板采用组合装配方式,对于折角变化频繁或折角较大的焊缝使用增加一转动关节的支板。该机器人结构紧凑、灵活,可实现对平面弯曲船形焊缝及各种平面弯曲角焊缝的自动焊接。 相似文献