共查询到19条相似文献,搜索用时 62 毫秒
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提出了近红外波段取像的思路,设计了基于不同取像机理的两种复合窄带滤光系统,在脉冲TIG焊的电弧加热下,采用普通CCD传感器从正面对重熔自动TIG堆焊铜熔池进行了传感采集,对1064nm、980nm、520nm和405nm滤光条件下的取像结果进行了比较分析,找到了相对较好的取像窗口,获得了清晰的铜熔池图像。由传感试验结果得出,采用TIG弧热源,近红外波段易于获得较清晰的熔池图像;脉冲TIG弧基值期间利用四种滤光波段都可获得清晰的熔池图像。并对重熔自动TIG堆焊铜熔池的特征和熔深的控制进行了分析和试验研究。 相似文献
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采用电涡流传感,步进式TIG焊方法,对低碳钢平板堆焊进行了焊缝熔透控制的研究,利用建立的暂态控制方法,实现了各焊点输入量的实时控制。 相似文献
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双钨极TIG电弧具有低电弧压力特性,能够在大电流下避免驼峰、咬边等缺陷,提高熔敷效率。为将其应用于增材制造,采用单丝输送和双丝输送两种模式,针对200 A以上的大电流双钨极TIG电弧,研究熔敷电流、送丝速度、行走速度对熔敷成形的影响。结果表明,在单丝输送模式下,200~350 A电流范围内,送丝速度过快会导致熔敷道铺展不良,而在350 A以上,送丝速度过快会导致插丝缺陷;采用双丝输送模式,能提高电弧熔丝热效率,有效降低插丝倾向,提高熔敷效率。最终得出200~650 A电流下的最大许用送丝速度和行走速度范围,为双钨极TIG电弧增材制造提供了成形良好的工艺窗口。双钨极TIG电弧增材在650 A熔敷电流下依然能够成形良好,熔敷效率达到5.36 kg/h。 相似文献
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The variation of joint groove size during tungsten inert gas (TIG) welding will result in the non-uniform fill of deposited metal. To solve this problem, an adaptive fill control system was developed based on laser vision sensing. The system hardware consists of a modular development kit (MDK) as the real-time image capturing system, a computer as the controller, a D/A conversion card as the interface of controlled variable output, and a DC TIG welding system as the controlled device. The system software is developed and the developed feature extraction algorithm and control strategy are of good accuracy and robustness. Experimental results show that the system can implement adaptive fill of melting metal with high stability, reliability and accuracy. The groove is filled well and the quality of the weld formation satisfies the relevant industry criteria. 相似文献
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The arc spectrum of TIG welding in high pressure was analyzed by Stark broadening.Using the characteristic line of ArI in welding arc,a study of electron density in high pressure revealed that the electron density of the welding arc had an upward trend with the pressure increase.According to data analysis,a curve of relationship between electron density and environmental pressure was established.It has a universal significance for change of electron density in high pressure.Through the analysis of electron density changing in time-domain in different pressure,a theoretical basis was provided for the problem of poor arc stability in high pressure. 相似文献