不同参数钢和铝TIG焊电弧光谱辐射分析

通过调整焊接参数,对不同焊接参数下(弧长、电流、气流量),钢(直流正接)和铝(直流反接)TIG焊电弧的光谱分布信息进行了采集,研究不同焊接参数下焊接电弧光谱信息的变化规律.结果表明,钢TIG焊过程中,不同谱段辐射强度会随弧长增加而增加,但在弧长较长时与较短时变化规律不同;其中线谱较少区域与弧长变化之间的线性度最好;辐射随焊接电流的增加成正比增加;在气流量较大时,随气流量变化不明显,气流量较小时存在明显影响.铝在TIG焊中,随弧长变化,光谱辐射强度没有明显变化;辐射随焊接电流的增加成正比增加;在气流量较大时随气流量变化不明显,气流量较小时存在明显影响.

Analysis on arc spectral radiation of TIG welding process of steel and aluminum with different parameters

Through adjusting welding parameters such as welding current, arc length and gas flow rate, the spectral distributions of TIG welding arcwere collected.In order to explore the variation of arc radiation in different spectral zone, TIG welding processes of steel and aluminum were studied for spectral distribution analy sis, respeetively.For TIG welding of steel, the light radiation increases with the arc length in different spectral zone, among which the radiation intensity in spectral zones with less line spectrum increase linearly with the arc length.However, the change law is different for long arc and short arc.The light radiation increases with the growth of welding current.The light radiation is nearly the same when the gas flow rate was in a rather large value.When the gas flow rate was low which can not provide enough protection for the welding arc, the light radiation is affected obviously.For TIG welding of aluminum, the light radiation does not change a lot with the arc length variation. The radiation increases with the growth of welding current.The gas flow rate has great effect on the light radiation of arc when it is low, while has less effect on the light radiation of arc when it is high.