论文部分内容阅读
气割的质量是指金属的金相组织变化、材料的物理性能和零件的几何形状精度。其中前两者与材料和切割方法有关,目前都能掌握。至于零件的几何形状精度,至今仍是影响气割质量的主要原因。气割几何形状精度包括:切割断面的几何尺寸和外形的控制。它们受下列因素影响:气割嘴的式样和尺寸、氧气流量、氧气的纯度、预热焰的氧与乙炔比
Gas cutting quality refers to the changes in the metallographic structure, the physical properties of materials and parts of the geometric accuracy. The first two are related to the material and cutting methods and are currently available. As part of the geometric shape accuracy, is still the main reason affecting the quality of gas cutting. Gas cutting geometry accuracy includes: cutting section geometry and shape control. They are influenced by the style and size of the gas cutting nozzle, the oxygen flow, the purity of the oxygen, the oxygen to acetylene ratio of the preheat flame