水下焊接脉动送丝机构的研制  

Study on the pulsed feeding wire system for underwater welding

作　　者：邓方雄[1] 钟继光[1] 石永华[1] 王国荣[1] 

机构地区：[1]华南理工大学机械工程学院,广东广州510640

出　　处：《电焊机》2006年第7期13-15,60,共4页Electric Welding Machine

基　　金：国家自然科学基金资助项目(50175027);广东省科技合作计划基金资助项目(20011654)

摘　　要：研制了一种用于水下焊接的脉动送丝机构。仿真试验表明,该机构能准确地按照“一送一停”的方式稳定送丝。同时,送丝机构的控制系统与水下焊接专用电源相配合,停止送丝时,焊接电源输出高电平,焊丝返烧并形成熔滴;开始送丝后,焊接电源输出低电平,熔滴依靠送丝动量向熔池过渡。水下焊接结果显示,采用该送丝机构能控制短路频率,焊接电流电压波形工整,焊接过程稳定,水下焊接成形美观。A pulsed-wire feeding machine for underwater welding has been developed.It is shown in simulations that this machine can feed exactly and stably by the mode of ‘run-stop＇ .The control system of the machine can work synchronously with the underwater welding power.When the wire being stopping,the welding power outputs high level voltage with wire burning back and forming a liquid weld metal drop.After the wire being fed,the welding power outputs low level voltage and the liquid weld metal drop are transferred to a liquid metal pool by the feeding momentum.Underwater welding results indicate that this machine can control short-circuit frequency and output stable current and voltage waveform with stable process and good seam profile.

关 键 词：脉动送丝 水下焊接 80C196KC单片机 

分 类 号：TG439.9[金属学及工艺—焊接]