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本文推荐一种测定过渡熔滴尺寸的方法,即62年英国电弧物理会议上石崎敬三提出的d_(50)法。这种方法可以较准确地定量测定过渡熔滴尺寸,再现性很好,方根差为0.059,误差系数为2.1％。本文就此方法做的一些验证性试验研究,结论如下: Ⅰ、d_(50)法把统计理论应用于随机量的测定,具有较科学的理论基础,实验证明它可以对各种影响熔滴尺寸的因素进行定量评定,因而不失作为一般焊条厂测定过渡熔滴尺寸的有效手段。 Ⅱ、焊条与碳棒之间夹角越大,熔滴尺寸越大。 Ⅲ、电流强度增大,熔滴尺寸是减小的,只是由于药皮类型不同,减小的趋势不同而已。 Ⅳ、极性对过渡熔滴尺寸亦有影响,通常正极性施焊要比反极性施焊时熔滴尺寸大。但变化趋势相同。 Ⅴ、能增加电弧析出的气体量或减小表面张力及界面张力的成份均能使过渡熔滴尺寸减小,如大理石、长石等。 上述试验研究表明:用d_(50)这个量来评定过渡熔滴尺寸是较为合理的,因为这个尺寸的熔滴也是出现频率最高的。因而适合没有特殊手段的工厂作为评定过渡熔滴尺寸大小的方法。
In this paper, we propose a method for determining the size of transitional droplet, the d_ (50) method proposed by Ishizaki Ohmi at 62-year British Arc Physics Conference. This method can be more accurately quantitative determination of transitional droplet size, good reproducibility, root mean square error of 0.059, the error coefficient of 2.1%. In this paper, some confirmatory experimental research is done on this method, the conclusions are as follows: Ⅰ, d_ (50) The statistical theory applied to the determination of random amount, with a more scientific theoretical basis, the experiment shows that it can affect the droplet size Quantitative evaluation of factors, so as a general measure of the transition electrode droplet size an effective means of size. Ⅱ, the larger the angle between the electrode and the carbon rod, the larger droplet size. Ⅲ, the current intensity increases, droplet size is reduced, only because of the different types of coating, reduce the trend is different. Ⅳ, the polarity of the size of the transitional droplet also have an impact, usually positive polarity welding than reverse polarity welding droplet size. But the trend of change is the same. Ⅴ, can increase the amount of arc deposition gas or reduce the surface tension and interfacial tension components can make the transition droplet size decreases, such as marble, feldspar and so on. The experimental study shows that: d_ (50) this amount to assess the size of the transitional droplet is more reasonable, because the size of the droplet is also the most frequent occurrence. It is suitable for factories without special measures as a measure of the size of the transitional droplet size.