氧气汽油火焰切割机理与试验

Mechanism and Test of Oxygen Gasoline Flame Cutting

针对在大口径厚壁钢管内氧气汽油火焰切割过程中经常出现熄火、切割不透以及切割稳定性差等问题,设计了氧气汽油火焰切割系统,并研究了氧气汽油火焰切割机理。利用氧气汽油切割系统对?1219 mm×25.4 mm的X80管线钢管进行了火焰切割试验,以切割角度、切割标距、预热时间、切割速度为因素,以切割效率为优化指标进行了正交试验研究。结果表明,切割角度对切割效率具有显著影响性;最优切割参数方案为:切割角度90°,预热时间120 s,切割标距12 mm,切割速度280 mm/min。该氧气汽油火焰切割参数对其他类型厚壁钢材的切割加工有参考借鉴作用。

In order to solve the problems of flameout, impenetrability and poor cutting stability in the process of oxygen gasoline flame cutting in large diameter thick wall steel pipe, an oxygen gasoline flame cutting system was designed and the oxygen gasoline flame cutting mechanism was studied. The flame cutting test of X80 pipeline steel with size of ?1219 mm×25.4 mm was carried out by using the oxygen gasoline cutting system. The orthogonal experiment was carried out with cutting angle, cutting distance, preheating time and cutting speed as factors, and cutting efficiency as optimization index. The results show that the cutting angle has a significant effect on the cutting efficiency. The optimal cutting parameter scheme is the cutting angle of 90°, the preheating time of 120s, the cutting distance of 12 mm, and the cutting speed of 280 mm/min. The oxygen gasoline flame cutting parameters can be used as a reference for the cutting of other types of thick wall steel.