Real-time monitoring of weld penetration quality in roboticarc welding process

It is of great significance to develop an intelligent monitoring system for weld penetration defects such as incomplete penetration and burn-through in real-time during robotic arc welding process. In this paper, robotic gas metal arc welding experiments are carried out on the mild steel test pieces with Vee-type groove. Through-the-arc sensing method is used to capture the transient values of the welding voltage and current. The raw data of the captured welding current and voltage are processed statistically, and the feature vector S10 is extracted to correlate the welding conditions to the weld penetration information. It lays foundation for intelligent monitoring of weld quality in robotic arc welding.     

基于考虑含气量变化浆体水击模型的复合管道水击数值计算

作者在提出了考虑含气量变化的同液两相流浆体水击基本方程的基础上，建立了考虑含气量变化的浆体水击模型。运用该模型对某电厂除灰系统管道进行了水击数值计算，根据计算结果提出了合理的建议，该建议已被采纳和应用。同时将计算结果与原有清水水击模型和浆体水击模型的计算结果进行比较，结果表明：该水击计算模型在进行同液两相流水击计算时精度高，可用于工程计算。     

浅析电力企业抄核收中的常见问题与解决措施

供电营业抄核收管理作为电力营销工作的关键环节,是供电企业生产经营成果的重要体现,也是影响企业经济效益的重要因素。近几年来宁夏吴忠市供电公司积极推行营销改革,统一和规范供电营业市场秩序,取得了良好成效。根据多年的基层供电营业管理实践经验,探讨了供电营业抄核收工作差错出现的问题及解决措施。     

弧焊机器人摆动跟踪时摆幅与频率的模糊模式识别

针对10 mm厚钢板V形坡口接头的弧焊机器人摆动跟踪焊接,实时测量电弧电压和焊接电流的瞬时值,对其进行两次统计处理,构建不同摆幅和摆动频率时的焊接电参数特征矢量,采用模糊模式识别技术,建立了焊接电参数特征矢量与摆动焊接摆幅和频率的内在联系,为定量研究摆幅和频率对V形坡口焊缝成形的影响提供依据。