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飞秒激光螺旋加工小孔几何参数演化实验研究
Authors
尤延铖
李效基
+3 more
殷春平
董一巍
赵奇
Publication date
30 January 2018
Publisher
Abstract
为了研究飞秒激光螺旋加工工艺参数对小孔成形过程的影响,以304不锈钢为靶材,选取飞秒激光螺旋钻孔工艺的主要参数,基于L25(56)正交表设计了5因素5水平正交实验,分析单脉冲能量、重复频率、旋转速率、焦点下移速率、吹气压力对烧蚀深度影响的显著水平;基于反向传播(BP)神经网络建立这5个因素与材料烧蚀深度之间的关系模型,并利用正交实验数据对网络进行训练,通过附加钻孔实验数据对所建立网络的泛化能力进行测试,结果表明所建立的模型预测误差在3%以内;针对螺旋钻孔的特征参数——焦点下移速率设计单因素实验,得到了飞秒激光螺旋钻孔过程中焦点下移速率对小孔成形影响的规律。国家自然科学基金(51705440);;广东省自然科学基金(2014A030310004);;福建省高校产学合作重大项目(2015H6023);;中央高校基本科研业务费专项资金资助项目(XMU,20720180072
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Last time updated on 10/06/2020