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研究了在CO2激光切割系统上切割的4130钢试样,以及功率和进给率对切缝宽度、表面粗糙度、条带频率和热影响区大小的组合影响。用回归分析研制了能描述独立工艺过程参数对激光切割质量影响的模型。对于试验的工作条件范围,观察到主要是功率影响切缝宽度和热影响区大小,而进给速率的影响是次要的。另一方面,表面粗糙度和条纹出现率受进给速率的影响最大。在低功率级时,可获得最小的切缝宽度和热影响区,并且进给速率的影响为中等。低进给速率可获得良好的表面粗糙度和低条纹出现频率。为了得到最佳的切割质量,切缝宽度、热影响区和表面粗糙度应保持最小。但是,在保持高生产率时不能满足符合这些要求的工作条件。
The 4130 steel samples cut on a CO2 laser cutting system were studied and the combined effect of power and feed rate on kerf width, surface roughness, band frequency and HAZ size was studied. A regression model was developed to describe the effect of individual process parameters on the quality of laser cutting. For the range of working conditions tested, it was observed that mainly the power affects the kerf width and the size of the HAZ, whereas the effect of feed rate is secondary. On the other hand, surface roughness and streak occurrence rates are most affected by the feed rate. At low power levels, the smallest kerf width and heat affected zone are obtained, and the effect of feed rate is medium. Low feed rate gives good surface roughness and low streak frequency. In order to get the best cutting quality, the kerf width, HAZ and surface roughness should be kept to a minimum. However, working conditions that meet these requirements can not be met while maintaining high productivity.