气体火焰切割中的后拖量是一个耐人寻味的問题。后拖量的大小,直接影响到切割質量,且与各种切割参数有密切关系。本文所述及的試驗結果,都是利用氧—乙炔焰切割的。 [后拖量的形成与特性] 鋼板被切割后,在截口上可以看到一些曲綫(見图1)。这些曲綫称为拖 The amount of trailing drag in gas flame cutting is an intriguing issue. After drag the size of a direct impact on cutting quality, and with a variety of cutting parameters are closely related. The test results described in this article are all cut using oxy-acetylene flame. [Post drag formation and characteristics] After the steel is cut, you can see some curves on the cut (see Figure 1). These curves are called drag