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合肥激光切割钣金加工浅谈辅助气体压力对切割质量的影响

一般来说,辅助气体的使用是物料切割所必需的,而涉及辅助气体的类型和压力的问题。通常,辅助气体与激光束同轴喷射,以保护透镜不受污染,并将切割区底部的炉渣吹走。对于非金属材料和金属材料零件,采用压缩空气或惰性气体除去、熔化和蒸发材料,同时抑制切削区的过度燃烧。

合肥激光切割钣金加工

In general, the use of auxiliary gas is necessary for material cutting, and involves the type and pressure of the auxiliary gas. In general, the auxiliary gas is injected coaxially with the laser beam to protect the lens from contamination and to blow away the slag at the bottom of the cutting zone. For non-metallic materials and metal materials, compressed air or inert gas is used to remove, melt and evaporate the material, while inhibiting excessive combustion in the cutting zone.


对于大多数金属,激光切割使用活性气体(只要O2)与热金属形成放热反应。附加热量的这一部分可以使切削速度提高1/3到1/2。


For most metals, laser cutting uses active gas (as long as O2) to form exothermic reactions with hot metals. This part of the additional heat can increase the cutting speed by 1/3 to 1/2.


合肥激光切割钣金加工浅谈辅助气体压力对切割质量的影响

煤气压力大小是保证辅助煤气的一个重要因素。在高速切削薄材料时,需要较高的气体压力,以防止熔渣粘在切削的背面(热量、炉渣对工件的损坏和切削刃)。当材料厚度增加或切削速度慢时,应适当减小气体压力,以防止塑料刃口结霜,同时也应降低气体压力切割。


The size of the gas pressure is an important factor to ensure the auxiliary gas. In high speed cutting of thin materials, higher gas pressure is needed to prevent the slag from sticking to the back of the cutting (heat, slag, damage to the workpiece and cutting edges). When the material thickness increases or the cutting speed is slow, should reduce the gas pressure suitably, in order to prevent the plastic edge frost formation, simultaneously also should reduce the gas pressure cutting.


激光切割实践表明,辅助气体纯度对辅助气体的切割质量有明显影响。氧纯度降低2%,切割速度降低50%,切口质量显著下降。


The practice of laser cutting shows that the purity of auxiliary gas has obvious influence on the cutting quality of auxiliary gas. The purity of oxygen decreased by 2%, the cutting speed decreased by 50%, and the quality of cut decreased remarkably.




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