共查询到19条相似文献,搜索用时 169 毫秒
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提出以电弧作为可控的“超声发射源”的工作原理,开发了具有一定带宽的激励电源用以激发电弧超声,通过传输线耦合方式与常规弧焊电源进行联机试验。在焊接过程中发现了激发电弧超声的若干谐振频段,记录了电弧超声的频率、幅度和相移。该原理表明,电弧不仅可作为“产热机构”,同时也可作为“超声发射机构”,开拓了电弧在焊接过程自动控制、质量检测等方面应用的新途径。 相似文献
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分析仪在焊接电参数测试中的应用 总被引:1,自引:0,他引:1
采用焊接质量分析系统,对焊接过程电参数进行精确的统计分析,自动生成电弧电压、焊接电流的波形图,电弧电压和焊接电流概率密度分布曲线,以及熔滴短路时间T1、电弧的燃弧时间T2、加权燃弧时间T3和短路周期Tc频数分布图,并且精确地得出相关数据.试验结果表明,汉诺威焊接质量分析系统能够对焊接工艺参数进行评估,为科学评价焊接材料工艺性,提供了新的手段. 相似文献
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针对当前对CO2焊机电源测试及其焊接过程分析的需要,开发出一套能自动测试弧焊电源性能的系统.通过对焊接过程中电弧电压、电源电流信号进行采集、处理,实现了对电焊机外特性的测试,同时可对焊接工艺性能做出实时评价.该系统具有智能化程度较高、人机界面友好、测试及数据处理功能齐全等特点,为以后焊机工艺技术的提高带来一定的推动作用. 相似文献
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介绍了一种先进的基于虚拟仪器的弧焊电参数测试仪.以电弧电压和焊接电流为信号源,采用LabVIEW7.1作为软件开发平台,开发了集试验参数设置、数据采集及处理和数据回放及分析三大模块为一体的测试系统.试验结果表明:该弧焊参数虚拟测试分析仪具有良好的灵活性和实用性,人机界面友好. 相似文献
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本文从焊接电弧光谱信息内容及其应用实例两个方面揭示了光谱信息与弧焊过程物理现象之间的本质联系,同时说明光谱诊断法在弧焊过程测控中的意义和应用潜力。对焊接电弧光谱信息的开发利用提供了一些有益的经验。 相似文献
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研究激光和Ar+He混合气体中He气体体积分数对激光+双丝脉冲MAG复合焊焊接稳定性的影响。搭建激光+双丝脉冲熔化极活性气体保护(Metal active-gas, MAG)复合焊焊接系统,利用LabVIEW信号采集系统采集焊接电流和电弧电压波形,借助高速摄像系统同步拍摄电弧形态和熔滴过渡过程,实时监测焊接过程。观察后丝短路和前丝断弧情况并对前丝电弧电压进行单因素方差分析,研究Ar+He混合气体中He气体体积分数对焊接稳定性影响;比较焊接过程中激光的有无对熔滴过渡的影响,分析激光对焊接稳定性影响。结果发现随着He气体体积分数增大,后丝对应短路次数增多,当He气体体积分数为50%时,前丝出现断弧现象,大于50%,断弧时间随之增加,焊接稳定性变差;激光+双丝脉冲MAG复合焊和双丝脉冲MAG复合焊相比,加入激光可稳定电弧,为熔滴提供一附加力,该力促进熔滴过渡,使熔滴过渡尺寸减小,加大过渡频率,改善熔滴过渡,提高焊接稳定性。 相似文献
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该文设计了一套基于STM32的双单片机控制系统对模拟控制式埋弧焊设备进行数字化改造。该系统包括电源控制系统和过程控制系统,2个系统之间采用串行异步通信方式,实现命令和参数交换。可以实现焊接电源多种外特性输出,满足埋弧焊、焊条电弧焊、气体保护焊、碳弧气刨工艺需要。设计双闭环控制系统对送丝速度进行调节,设计单闭环控制对小车驱动电机进行控制。测试表明,改造后的焊机用途拓宽,人机界面丰富,引弧、焊接、收弧的稳定性和可靠性均大幅提升,具有很好的实用价值。 相似文献
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Xiaoyu Cai Huan Li Huiliang Wei Lijun Yang Ying Gao 《The International Journal of Advanced Manufacturing Technology》2014,75(9-12):1829-1836
In this paper, the effect of laser on the welding process in metal inert gas (MIG) welding of aluminum alloys was studied exploiting high-speed imaging and welding electrical signals collecting. Bead-on-plate welding experiments were conducted using conventional short-circuiting transfer MIG welding and laser-short-circuiting transfer MIG hybrid welding. The obtained results point out that it took less time to strike the arc in laser-MIG hybrid welding, and the stability of arc striking was increased. When the laser was introduced into the arc atmosphere, the arc was compressed, and the welding energy was more concentrated. The arc cathode spot was fixed to the laser beam impinging spot, so the arc could burn stably. In laser-MIG hybrid welding, the droplet short-circuiting transfer stability and the weld appearance were improved significantly. Moreover, an analysis method of judging droplet transfer stability which bases on statistical techniques was proposed. By this method, it can be concluded that the short-circuiting transfer process became more stable in laser-MIG hybrid welding. 相似文献
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在分析螺柱送进过程的基础上,对步进式电弧螺柱焊过程中螺柱送进深度的控制问题进行了研究。以焊接过程中螺柱与工件之间的相对位移为控制量,采用位移传感器检测螺柱送进过程中焊枪弹簧压缩位移,以此获知螺柱与工件之间的接触状态,实现对螺柱送进深度的控制。试验结果表明,步进式电弧螺柱可以实现螺柱送进深度的自动控制,无需在焊前预先设置螺柱送进深度;采用不同螺柱提升高度进行焊接时,控制系统可以做出相应的调整,保证合适的螺柱送进深度。将此方法用于螺柱穿透焊,能够有效减小间隙对焊接过程的影响,保证焊接过程的顺利实现。 相似文献
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Prevention of humping bead associated with high welding speed by double-electrode gas metal arc welding 总被引:2,自引:0,他引:2
C. S. Wu Z. H. Hu L. M. Zhong 《The International Journal of Advanced Manufacturing Technology》2012,63(5-8):573-581
Manufacturing productivity can be improved by increasing the welding speed. However, humping bead will occur when welding speed is beyond a certain value. An experimental system of double-electrode gas metal arc welding (DE-GMAW) was developed to implement high speed welding and prevent from humping bead formation. The DE-GMAW appropriately partition the heat energy between the wire and the base metal so that higher deposition rate of filler wire and suitable shape and size of weld pool are ensured. The arc images captured during DE-GMAW process were used to optimize the geometric parameters between the gas tungsten arc welding and the gas metal arc welding (GMAW) torches. The main arc and bypass arc integrated well and satisfactory weld bead formation was obtained. Through observing the weld pool behaviors from side view during DE-GMAW process, it was found that the height of both solidified and molten region at the pool tail is almost flat so that no humping bead was formed during DE-GMAW with the welding speed up to 1.7?m/min. The side view images of weld pool in DE-GMAW were compared with those in conventional GMAW, and the reason why DE-GMAW can suppress humping bead is shortly discussed. 相似文献
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《Measurement》2016
During welding, random variations in current and voltage occur, which cannot be recorded with ordinary ammeter and voltmeter. Acquisition of voltage and current signals while welding is in progress at a very high speed using Digital Storage Oscilloscope (DSO) and subsequent analysis of the stored data can be very useful to understand the arc welding process. In the present study, welding data were acquired for two inverter and two generator power sources while welding with two different electrodes using a DSO at the sampling rate of 40,000 samples/s. This data was filtered using the Fast Fourier Transform (FFT) low pass filter and subjected to time domain and statistical analysis. Probability Density Distributions (PDDs) were used to evaluate performance of power sources and consumables. Results clearly differentiate between the arc characteristics for different power sources and consumables. 相似文献
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Chenxiao Zhu Xinhua Tang Yuan He Fenggui Lu Haichao Cui 《The International Journal of Advanced Manufacturing Technology》2017,90(9-12):2513-2525
As an efficient process, narrow gap gas metal arc welding (NG-GMAW) was employed to join thick plates of 5083 Al-alloy. In this paper, arc characteristics in NG-GMAW of 5083 Al-alloy and their influence on the weld bead geometry were studied with synchronous acquisition system for various groove types, welding modes, welding current levels, and swing frequencies. The arc profiles were measured and appear to be entirely different compared with that in bead-on-plate GMAW process, meanwhile the arc size changes with varied welding mode, welding current, and arc swing frequency. Arc characteristics highly affect the weld bead geometrical parameters such as bead width, welding penetration, sidewall penetration, and weld surface concavity. Linear regressions were made between the arc characteristics and the weld bead geometrical parameters both in swing and non-swing arc process. It showed that a negative linear correlation exists between welding penetration and arc length, sidewall penetration, and arc warpage, while a positive linear correlation exists between weld surface concavity and arc warpage in non-swing arc process. In contrast, a non-linear correlation exists among them and the variation tendency remains the same in swing arc process. 相似文献