不同工艺打印钥匙的表面形貌特征及其性能研究

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中图分类号：V445 文献标志码：A 文章编号：2095-2945（2025）27-0054-06

Abstract：Thethree-dimensional（3D）printedkeyisakeythatcanbemanufacturedfromitsvirtual model bymeansofa3D printer.Inthispaper，71printedkeysweremanufacturedusingsixdiferentmaterals（whiteresin，whitenylonpowders，black ABS，Ti alloy，Alallyandstainlessteel）andonfiveprintersincorporatingstereolithogaphy（SL），selectivelasesintering （SLS）fuseddepositionmodeling（FDM），andselectivelasermelting（SLM）technologies.Temorphologiesofaprintedkeywere examinedunderseveralmagnfcationswithstereomicroscopeandscanningelectronmicroscope.Thefracturetorquesofaprintedkey weretestedwithadigitaltorquewrenchwhilethedimensionsweremeasuredwithaVerniercaliper.Meanwhile，therateof the printed keys were statistical analyzed.The results shows that the total picking ratio is up to 97.2% ，meaning that a printed keycan beusedtopickthemechanicallock.Therearediferencesinthemorphologicalcharacteristicsoftheprintedkeys，thereforethe morphologicalfeaturescanbeusedtoanalyzethetypeofprintingtechnologies.The3Dprintedkeysareonaverageaccuratetothe sourcekeys，withmostdimensionaldiferencesfromO.O8～.49mm.Thefracturetorquesofprintedkeysusingwhiteresin，white nylonpowderandblackABSare morethantorquesof picking locks，butthoseof printedcross keyswithblackABSare lower.

Keywords：forensic Science;3Dprinted key;pickingratio;morphological characteristics;dimensional accuracy

3D 打印技术（three-dimensional print technology，3DPT即快速成型技术的一种，又称为增材制造技术，是一种以数字模型文件为基础，运用粉末状金属或塑料等可黏合材料，通过逐层打印的方式来制造物体的技术。（剩余7426字）