Study of Preheating Flame on Oxygen Cutting (Report 3)

Effect of Preheating Flame on Material Thickness to be Cut

Abstract

In the previous reports. Author indicated that preheating flame has the function to keep purityy and momentum of cutting oxygen stream.
It may be supposed that the function of this kind of preheating flame should give an influence on the material thickness to be cut.
Experiment was done about relation between maximum cutting thickness and flame position to cutting oxygen stream using several types of cutting torch, and following results, were obtained.
1) The function of gas flame to keep momentum of oxygen stream was reconfirmed, and the keeping effect was found to be related to flame position to oxygen stream.
2) The momentum of oxygen stream has close relation to maximum cutting thickness (T_m) and therefore preheating flame affects cutting thickness.
3) Position of flame to oxygen stream has relation to T_m-log ν characteristics.
4) Cutting of thinner material is affected by oxygen purity and a thicker material affected by oxygen momentum.
5) Some other functions of preheating flame will be made clear by introducing the keeping effect of, oxygen purity and momentum in analizing the cutting phenomena.