摘要
在厚壁管、压力容器及电站锅炉的窄间隙全位置焊接中 ,钨极运动轨迹是动态的。根据窄间隙全位置焊接工艺要求 ,从钨极运动轨迹角度 ,提出了钨极运动轨迹综合控制方案 ,通过对钨极柔性接触引弧轨迹上的各参数作用机理研究 ,提出钨极柔性接触引弧控制方法 ;根据钨极摆动轨迹分析 ,提出基值电压控制弧长和基、峰值电压值分别控制弧长两种方案 ;为避免在窄间隙U形坡口两侧壁出现”爬弧现象” ,设计了焊缝横向运动轨迹计算机控制自动跟踪系统 ;根据全位置焊接重力对钨极纵向运动轨迹影响特点 。
The synthesizing control scheme is put forward based on the requilement of narrow-gap all-position welding technology in terms of the moving track of tungsten electrode. Soft touch-striking arc of the tungsten electrode has been made through researching the mechanism of parameters effect on tungsten track. Two projects of arc length adjusted by backgroud and pulse vohage or backgroud voltage have been obtained by analysing the track of swing tungsten electrode. Autonomously tracing system controlled by computer on transversely moving track has been designed in order to avoid the climbing arc phenomena on two side walls of narrow gap U groove. The changeable gain proportional integral differential controller of arc length , based on arc voltage sensor and the single chip microcomputer , is developed on the characteristic of the influence of gravity on tungsten electrode vertical moving track during all-position welding .
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2004年第5期17-21,共5页
Transactions of The China Welding Institution
基金
黑龙江省青年基金资助项目 (QC0 1C3 1)
哈尔滨市科技攻关项目 ( 0 1112 11118-4 )
关键词
可变增益PID控制器
引弧轨迹
摆动轨迹
多自由度控制
窄间隙全位置焊接
changeable gain proportional integral differential controller
tungsten touch-striking arc track
tungsten swinging track
multifreedom controlling
narrow-gap all-position welding
