摘要
为了研究光纤激光氮气熔化切割方式下,材料去除率与激光切割工艺参数之间的理论关系,文章采用量纲分析法建立了数学模型,然后通过功率为3000 W的光纤激光切割机对厚度为3 mm的SUS304不锈钢进行了单因素激光切割实验,确定了模型中切割综合参数的变化规律。根据实验结果及模型分析得出:去除系数对挂渣高度影响主要由焦点位置的临界值决定,当焦点位置大于此临界值时,两者正相关,反之则两者负相关;材料能否被穿透取决于激光切割综合参数,不同焦点位置存在不同的激光综合参数的临界值,对于3 mm不锈钢最小临界值出现在焦点为1 mm处,大小为42.76。
In order to study the theoretical relationship between the material removal rate and the laser cutting process parameters under the model of Fiber laser nitrogen melting cutting,a mathematical model which is based on dimensional analysis method is established,Then,a single-factor laser cutting experiment was carried out on SUS304 stainless steel with a thickness of 3 mm by a fiber laser cutting machine with a power of 3000 W,and the variation law of cutting comprehensive parameters in the model was determined.According to the analysis of the experimental results and the model,it is shown that the effect of the removal coefficient on the molten slag height is mainly determined by the critical value of the focus position.When the focus position is greater than this critical value,they are positively correlated,otherwise they are negatively correlated;Whether the material can be penetrated depends on the comprehensive parameters of laser cutting.There are different critical values of laser comprehensive parameters at different focus position.For 3 mm stainless steel,the minimum critical value appears at the focus position of 1 mm,with the size of 42.76.
作者
董玉春
王欢
刘怡君
DONG Yuchun;WANG Huan;LIU Yijun(School of Intelligent Engineering,Yanching Institute of Technology,Langfang 065201,CHN)
出处
《制造技术与机床》
北大核心
2023年第10期116-122,共7页
Manufacturing Technology & Machine Tool
基金
河北省高等学校科学技术研究项目(ZC2022046)。
关键词
激光切割
量纲分析法
去除系数
激光切割综合参数
laser cutting
dimensional analysis method
removal efficiency
laser cutting comprehensive parameter
