6kW大功率光纤激光器切割6mm不锈钢工艺  

Cutting process of 6 mm stainless steel plate with a 6 kW fiber laser

作　　者：王威[1] 上媛媛[1] 王旭友[1] 雷振[1] 林尚扬[1] 

机构地区：[1]哈尔滨焊接研究所,黑龙江哈尔滨150080

出　　处：《机械制造文摘（焊接分册）》2011年第2期16-19,共4页Welding Digest of Machinery Manufacturing

摘　　要：采用6kW光纤激光器切割6mm不锈钢,分析了不同的激光切割工艺参数,如激光功率、切割速度、切割气体种类及压力、焦点位置以及激光倾斜角度对切割质量的影响。以切缝背部的挂渣情况作为评判切缝质量的标准,结果表明:增大切割气体压力可以降低底部挂渣以及粗糙度,但是压力达到一定程度后,挂渣和粗糙度没有明显变化;在切割厚板时,焦点位置位于工件的下部并且越靠近底表面,效果越好;光束入射倾角超过25°,切割质量变差,甚至切不透。通过大量的切割工艺试验得到在切割气体为N2,激光功率为3.3kW,切割速度为2.0m/min,离焦量为-4mm,气体压力为1.7MPa,喷嘴到工件表面距离为1.0mm时,切割质量最佳。A Gas assisted laser cutting of 6 mm stainless steel plate was performed with a 6 kW fiber laser. The effects of laser power, cutting speed, assist gas and pressure, focal point position and angle on the cutting performance and quality were investigated. The dross of cut surface was investigated to evaluate cutting quality. The result showed that the increment of gas pressure could reduce the dross at the bottom of the plate, but when the gas pressure be reached a certain degree, the dross and roughness didn＇ t reduce significantly. The focus position was located in the subsurface the plate when the thick plate was cut, and the better quality can be obtained. If the laser incident angle was more than 25°, cutting quality deteriorated and even can＇t be completely cut through the plate. A large number of tests indicated that the best cutting quality was achieved when assisted gas was N2 , laser pow- er was 3.3 kW, cutting speed was 2.0 m/min, defocus amount was -4 mm, assisted gas pressure was 1.7 MPa, and distance be- tween cutting head and plate was 1.0 mm.

关 键 词：光纤激光 激光切割 不锈钢 

分 类 号：TG485[金属学及工艺—焊接]