文档介绍：摘要
激光切割是一种能够实现自动化、高精度和高速度的切割方法。本文以深圳
木森科技有限公司生产的光纤激光切割机开展实验研究,主要内容包括以下几方
面:
(1)通过实验探究激光切割中起刀线对切割质量的影响。实验结果表明:
起刀线切入角θ接近 90°时切口质量最好,并且发现在情况允许的条件下,切割
线长度应适当延长。
在确定起刀线位置的基础上通过单因素实验方法,探究了激光功率、脉宽和
辅助气体对切割质量的影响。实验结果表明:采用激光功率 39W,脉冲宽度 45μs,
气压 的工艺参数对 厚的 316L 低碳不锈钢进行切割,得到较好的
宏观形貌。
(2) 针对 SMT 激光模板切割中常见的问题产生的原因,进行了详细的分
析,并从工艺的角度提出了改进措施。
(3)通过实验研究了激光切割技术参数对加工孔的质量的影响关系。激光
打孔实验表明:孔径随激光能量的增加而增大;窄脉宽可得到较大的孔径;要获
得最小孔径的孔,焦点的具体位置因材料的不同而已;辅助气体也是影响激光打
孔质量的一个重要参数,它起到吹除熔融金属及冷却工件的作用,对于不锈钢材
料来说,用氧气作为辅助气体效果最佳。
(4)对氧化铝陶瓷的切割和划片进行了对比实验研究。实验结果表明,与
切透切割相比,划片切割后的切边光滑平整,无挂渣产生,在切割精度要求高的
情况下,宜进行激光划片切割。
关键词:激光切割;精密加工;光纤激光器;工艺参数
I
Abstract
Laser cutting is an automated, high precision and high speed cutting method. In
this paper, We use fiber laser cutting machine produced by Shenzhen Musen
technology Co., Ltd. to carry out experimental research. The main contents are as
follows:
(1) The influence of the auxiliary line to cutting quality was explored through
experiment. We found that when the cutting angle closed to 90 °, the incision
appeared the best quality. If circumstances condition permited, the length of the
auxiliary should be extended.
Single factor experiments were done on the basis of the location of the auxiliary
line was determined. The effects of laser power, pulse width and assist gas for cutting
quality were investigated. The experimental results showed that by using laser power
39W, pulse width 45us, the air pressure to cut 316L low carbon stainles stell
of thick could get a better macro-morphology.
(2) mon problems of the SMT laser stencil cutting were analyzed in detail,
and the solving measures were put forward.
(3) In this paper, the relationship of the laser cutting process parameters on the
quality of the processing hole was expored. Laser drilling experiments showed that
the hole diameter increases with laser energy increasing; Narrow pulse width
availabled to