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割炬的设计和制造对获得良好切割质量产生着重要影响
 

喷嘴的选用不当或保养不当造成的污染或损坏,或由于喷嘴圆度不好或由于金属飞溅造成的局部堵塞,会形成喷嘴内的涡流,导致切割性能严重恶化。有时,喷嘴的喷嘴和聚焦光束不同轴,形成的光束的切割边缘,也影响切边质量,增加切口宽度和切割尺寸错位。

割炬的设计和制造对获得良好切割质量产生着重要影响

(1)喷嘴直径的影响。喷嘴尺寸对切割速度有一定的影响,喷嘴尺寸也影响出口的压力分布。喷嘴直径的增大,射流冷却效果强贱金属切削区,热影响区变窄,但也会导致切缝宽度,而喷嘴尺寸会导致定位困难,喷嘴是在危险中,光束截断和狭缝太窄,会阻碍高切削速度渣顺利排出。


(2)喷嘴与工件表面距离的影响。喷嘴与工件之间的直接影响喷嘴气体流量和工件的切缝之间的耦合距离。喷嘴太接近工件的表面,会有一个镜头上的强反压,使切割生产材料点分散能力的溅射,对切割质量的影响是不利的,但距离太远,会造成不必要的能量损失,为有效切削也不利。一般来说,喷嘴间距和工件控制在1~2mm是合适的,现代激光切割割炬系统配有感应或电容式传感器反馈装置,自动调节预定高度之间的距离。


The nozzle such as the selection of inappropriate or poor maintenance caused by pollution or damage, or because the nozzle roundness is not good or because of the hot metal spatter caused by partial blockage, will form a vortex in the nozzle, resulting in cutting performance significantly worse. Sometimes, the nozzle nozzle and the focusing beam are different shafts, forming the edge of the cutting edge of the light beam, and also influencing the cutting edge quality, increasing the kerf width and making the cutting size malposition.


(1) the influence of nozzle diameter. The nozzle size has a certain influence on the cutting speed, and the nozzle size also affects the pressure distribution at the outlet. The nozzle diameter increases, the jet flow strong cooling effect to the cutting area of base metal to heat affected zone narrowed, but also will cause the slit width, while the nozzle size will cause the alignment difficulties, the nozzle is in danger, the beam truncation and the slit is too narrow, will hinder the smooth discharge of slag in high the cutting speed.


(2) the influence of the distance between the nozzle and the workpiece surface. The distance between the nozzle and the workpiece directly influences the coupling between the nozzle air flow and the kerf of the workpiece. The nozzle is too close to the surface of the workpiece, will have a strong back pressure on the lens, weaken the cutting production material point disperse ability of sputtering, have an adverse effect on cutting quality, but the distance is too far away and will cause unnecessary loss of energy, it is also bad for the effective cutting. In general, the nozzle spacing and the workpiece is controlled in 1 ~ 2mm is appropriate, the modern system of laser cutting torch is equipped with inductive or capacitive sensor feedback device to automatically adjust the distance between the height of a predetermined range.


合肥钣金加工官方网站:http://www.hfzbjg.com/

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