摘要
利用飞秒激光切割结合微细电阻滑焊制备三维金属微双联直齿轮模腔:在厚度为20μm的0Cr18Ni9不锈钢箔上,在230mW的飞秒激光功率、50μm/s的切割速度和1.5μm的切割补偿量下获得二维微结构;之后在0.22V的焊接电压,20N的焊接力和10ms的放电时间下,利用微细电阻滑焊对多层二维微结构进行热扩散焊接叠加拟合而成具有曲面特征的微型腔。将平均粒径100μm的乙烯-醋酸乙烯共聚物(EVA)塑料粉末充填入微双联齿轮型腔,在超声波塑料焊接机上设定不同的工艺参数进行成型实验表明,焊接压强为0.2MPa,焊接时间为2.5s,保压时间为0.2s,熔体能快速填充模腔,得到表观形状复制率较好的微塑件。
The preparation technics of 3D metal micro dual gear cavity by femtosecond （FS） laser and electric resistance slip welder was introduced. 0Cr18Ni9 stainless steel foils （20 μm thick） was taken as the base and welded by 230mW FS laser at a speed of 50 μm/s, a compensation rate of 1.5 μm to prepare a 2D structure. Then, the structure was repeatedly overlaid and fitted with resistance slip welder （welding voltage of 0.22V, welding force of 20N, welding time of 10 ms） to prepare a cavity with flee-form surface. Finally, the cavity was filled with ethylene vinyl acetate （EVA） powder （particle size of 100 μm） to forms a micro gear part with good apparent replicability under the conditions, such as the welding： pressure 0.2MPa, the welding time 2.5s and the holding time 0.2s.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第7期114-117,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51175348)
深圳市模具先进制造技术重点实验室开放基金项目(M201301)
关键词
微齿轮
超声波焊接
微细电阻焊
飞秒激光切割
X射线衍射
micro gear
ultrasonic welding
micro electric resistance slip welder
FS laser cutting
X-ray diffraction
