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首页> 外文期刊>Journal oflaser Applications >Inert gas cutting of thick-section stainless steel and medium-section aluminum using a high power fiber laser
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Inert gas cutting of thick-section stainless steel and medium-section aluminum using a high power fiber laser

机译：使用高功率光纤激光器对厚截面不锈钢和中截面铝进行惰性气体切割

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摘要

Inert gas assisted laser cutting of 10 mm stainless steel plate and 4 mm aluminum sheet was performed with a 5 kW fiber laser. The effects of laser power, cutting speed, focal point position, and assist gas pres .ure on the cutting performance and cut quality were investigated. Clean cut surfaces without or with minimal dross were achieved with some combinations of process parameters and attempts were made to define parameter windows in terms of cutting speed and laser power for good quality cutting. The maximum cutting speeds for acceptable cut quality were determined at different power levels. The range at which complete through cutting could be achieved (so-called parameter window) was limited upwards by insufficient power intensity to obtain through cutting at high cutting speeds and downwards by heal conduction at slow cutting speeds. The effects of focal point position and assist gas pressure on the striation pattern (cut surface roughness) were also examined. Low surface roughness was achieved with the focal point position inside the workpiece showing the need for a wider kerf for better melt ejection in thick-section metal cutting. There was also a reduction in surface roughness wilh increase in assist gas pressure, but there was no significant reduction in surface roughness above the gas pressure of 16 bar, which could be due to the gas flow dynamics inside the narrow cut kerf at high assist-gas pressures.
机译：用5 kW光纤激光器对10 mm不锈钢板和4 mm铝板进行惰性气体辅助激光切割。研究了激光功率，切割速度，焦点位置和辅助气体压力对切割性能和切割质量的影响。通过工艺参数的一些组合，可以得到无渣或渣渣最少的干净切割表面，并尝试根据切割速度和激光功率定义参数窗口，以实现高质量切割。在不同功率水平下确定可接受的切割质量的最大切割速度。可以实现完全穿透切割的范围（所谓的参数窗口）由于功率强度不足而向上限制，无法以高切割速度进行穿透，而向下则通过低速修复时的恢复传导来实现。还检查了焦点位置和辅助气压对条纹图案（切割表面粗糙度）的影响。通过在工件内部的焦点位置显示出需要更宽的切槽以实现厚截面金属切削中更好的熔体喷射，可以实现较低的表面粗糙度。辅助气体压力的增加也降低了表面粗糙度，但是在16 bar的气体压力以上，表面粗糙度没有明显降低，这可能是由于在高辅助压力下窄切缝内部的气流动力学所致。气压。

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  • 来源
    《Journal oflaser Applications》 |2009年第3期|154-161|共8页
  • 作者

    Catherine Wandera; Antti Saiminen; Veli Kujanpaa;

  • 作者单位

    Department of Mechanical Engineering, Lappeenrunta University of Technology, Tuotantokatu 2, Lappeenranta FIN-53850, Finland;

    Department of Mechanical Engineering, Lappeenranta University of Technology, Tuotantokatu 2, Lappeenranta FIN-53850, Finland and Machine 'Technology Centre 'Turku Ltd., Lemminkciisenkatu 28, Turku F1N-20520, Finland;

    Department of Mechanical Engineering, Lappeenranta University of Technology, Tuotantokatu 2, Lappeenranta FIN-53850, Fin/and and VTT The Technical Research Centre of Finland, Tuotantokatu 2, Lappeenranta, FI-53850, Finland;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fiber laser cutting; thick-section; stainless steel; aluminum;

    机译：光纤激光切割厚截面不锈钢;铝;

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