论文部分内容阅读
某工程要求我们用氧—乙炔炬切割长度达15米的A_2,16 Mn钢板,钢板厚度为6～100毫米,大多数为32毫米。时间要求紧,质量要求高。为此,我们采用了快速割咀。在进行快速气割时,常会碰到“抽风”现象,以致使气割断面产生凹凸不平,影响质量。对于产生“抽风”现象的断面须用电焊修补,然后再用砂轮磨平,方能满足用户要求。为什么会产生“抽风”现象以及如何解决它呢?就这个问题我们来谈谈多年来的观察和认识,以供参考讨论。当然对于半自动气割机的变速故障,以及由于钢板底部有氧化铁等障碍物而使气割氧流喷吐不畅,导致倒吹所引起的钢板气割断面缺陷,都不属于本文讨论的范围。
A project requires us to use an oxygen-acetylene torch to cut A2, 16 Mn steel plates up to 15 meters in length. The plate thickness is 6 to 100 millimeters, and most of them are 32 millimeters. Time requirements are tight and quality requirements are high. For this purpose, we used a quick cutting nozzle. When performing rapid gas cutting, the phenomenon of “drafting” is often encountered, so that the gas-cutting section is uneven and affects the quality. The section that produces the “drafting” phenomenon must be repaired by electric welding and then ground with a grinding wheel to meet the user’s requirements. Why is there a “spitting” phenomenon and how to solve it? On this issue, let’s talk about observations and understandings over the years for reference. Of course, for the semi-automatic gas cutting machine’s variable speed failure, and because of iron oxide and other obstructions at the bottom of the steel plate, the gas cutting oxygen flow is not smooth, resulting in blown plate caused by gas cutting section defects, are not included in the scope of this article.