高压水下环境旋转电弧焊接的断路临界频率分析  

Open circuit critical frequency analysis of rotationg arc welding under high-pressure water enviroment

作　　者：李志刚[1] 张华[2] 

机构地区：[1]华东交通大学载运工具与装备教育部重点实验室,南昌330013 [2]南昌大学江西省机器人与焊接自动化重点实验室,南昌330031

出　　处：《焊接学报》2012年第10期54-58,116,共5页Transactions of The China Welding Institution

基　　金：国家863高技术研究发展计划资助项目(2007AA04Z242);载运工具与装备省部共建教育部重点实验室开放研究项目

摘　　要：在搭建高压水环境旋转电弧焊接硬件平台进行试验的基础上,得到高压舱中焊接电流和电弧电压的信号波形,对其进行了统计分析,从中可以发现大量的短路过渡.通过建立坡口扫描单元的数学模型、逆变电源模块的数学模型、动态电压负载模型、弧长变化模型、液桥行为模型各子块模型,在大系统范围内建立了高压水环境下旋转电弧传感焊接模型.结合与高压水环境旋转电弧试验所得焊接信息,在设定焊接电流和电弧电压不变的情况下,研究了旋转电弧传感器的旋转频率对高压水环境焊接过渡过程的影响.结果表明,当坡口为一定时,旋转频率由20 Hz减少至13 Hz再减少到10 Hz时,断路现象逐渐减少.以此得到高压水下应用环境下,旋转电弧传感器焊接的断路临界频率.Based on the high-pressure water environment rotating arc welding system,the signal wave of welding current and voltage is obtained and statistically analyzed.A mass of short-circuit transten was found out.Through the groove scanning unit mathematical model,the inverter power model,the arc change model and the liquid bridge behavior model,the rotating arc sensing welding model under high pressure water environment was established.Combined with the actual welding experiment data under high pressure water environment,the influence of arc rotating frequency on the welding transition process was studied.The result shows when the groove is at a fixed degree,with the decreasing of rotating frequency from 20 Hz to 13 Hz,and then to 10 Hz,the phenomenon of open-circuit decreased gradually.The open circuit critical frequency was obtained under high-pressure water environment.

关 键 词：高压水环境 旋转电弧 短路模型 

分 类 号：TG409[金属学及工艺—焊接]