ガス切断における切断酸素圧力と切断可能板厚との関係についての研究

抄録

Relating to cutting oxygen pressure P₀ and maximum cutting thickness T_m, cutting tests were made using several kinds of nozzles with the following results.
a) In case of applying proper pressure on divergent nozzle, T_m is increased with an increasing P₀, and the increasing degree of T_m is in proportion to oxygen energy density at nozzle exit.
b) In case of applying excess pressure on both straight bore and divergent nozzle, T_m reaches a limit value with an increasing P₀, and the limit value of T_m depends on design of nozzle.
c) Occurrence of shock wave in the oxygen jet with excess pressure is a cause of existence of the limit value of Tm.
d) Greater limit value of T_m is obtained with oxygen curtain nozzle than with conventional nozzle. The function of the shock wave in the cutting phenomena is discussed and made clear.