焊条典型熔滴过渡形态的判读

Evaluation of typical metal transfer modes for covered electrode

粗熔滴短路过渡,渣壁过渡,爆炸过渡和喷射过渡是焊条的基本过渡形态。过去一直采用光电示波器记录的电弧电压、焊接电流波形图,定性地描述熔滴过渡的一般特征,不可能进行精确的定量分析。通过对汉诺威弧焊质量分析仪获取的焊条四种典型熔滴过渡形态的电弧电压、焊接电流概率密度分布图的特征和短路时间t1、燃弧时间t2、加权燃弧时间t3和过渡周期tC的数据进行统计分析,可精确地描述焊条熔滴过渡形态的电弧物理特征,并能够判别焊条熔滴过渡形态。为焊条熔滴过渡形态的判定提供了一种新方法。

There are four basic metal transfer modes,globular droplet transfer,flux-wall guided transfer,explosive transfer and spray transfer for covered electrode.Photoelectrical oscillograph is traditionally employed to analyze arc voltage and welding current as two major electric parameters for the purpose of understanding the stability degree of a welding operation.Only the general characteristic of metal transfer can be qualitatively described and the quantitative analysis can't be carried out.Those parameters,such as probability density distributions of arc voltage,welding current and the data of short-circuiting time t_1,burning time t_2,weighted burning time t_3,cycle time t_c,which are existed in four kinds of typical metal transfer modes and can be added up and analyzed by ANALYSATOR HANNOVER.Four typical metal transfer modes can be evaluated by analyzing above-mentioned parameters.The arc physical characteristic of different metal transfer modes can be accurately described.The statistical analysis of electric parameters,which are collected by ANALYSATOR HANNOVER,provide a new method to determine the metal transfer mode for the covered electrodes.