活塞杆镀层厚度测量不确定度评定

打开文本图片集

中图分类号：TG142.31 收稿日期：2026-03-16 DOI：10.19999/j.cnki.1004-0226.2026.04.014

Abstract：Coating thicknessonpistonrodwasdetectedbyusingaZEISS metalographic microscope.Afteranalyzingthe sources ofuncertainty，twasdecidedtotablshamathematicalodelusingtheomprehensieevaluationmethodandcalulatetheetain tycomponentsoftypeAandypeB.Finall，temeasurementuncertaintyoftecoatingticknessasevauated，thatis，teexpanded uncertainty U=2.4μm ，the confidence probability p=95% ，and the inclusion factor k=2 .The results showed that the key influencing factorsthathadasignificantimpactonthemeasurementuncertaintyofthecoatingthicknessofthepistonrodwereequipmentcalibrationandoftwaremeasurementstandardruler.Thisconlusioionucivetolaboratorytestersconductingtestingctivitisorefec tively and ensuring the accuracy and reliability of the measurement results.

Keywords：Coating thickness;Metallographic microscope;Piston rod;Measurement uncertainty

1前言

活塞杆是支持活塞进行往复运动的核心零部件，广泛应用于汽车与交通运输、工程机械、工农业设备中[1-2]。（剩余4025字）