简介:Acomputationalapproachtoblankingprocesses,Amodelandalgorithmoftwo-dimensionaloptimumlayoutinblanking,Astudyoftheeffectofvaryingvisualocclusionandtaskdurationconditionsondriverbehaviorandperformancewhileusingasecondarytaskhuman-machineinterface,Aninvestigationontheformationandpropagationofshearbandinfine-blankingprocess,Analysisofsimultaneoussheetmetalformingoperationsusingelastomertechnique.
简介:Finiteelementsimulationofthepunching/blankingprocessusingin-processcharacterizationofmildsteel;Finiteelementsimulationoftheshearingmechanismintheblankingofsheetmetal;Fundamentalstudyonincrementalshearing;HighspeedendmillingofhardenedAISID2toolsteel(~58HRC);Highspeedlaserblankingofaluminum;Improvementofmultistationsheet-stampingautomataserviceefficiency
简介:AbimodalenergymodelforcorrectingbeamhardeningartefactsinX-raytomography,Applicationofwheatflourlubricantstothepress-formingprocess,LaserRollBondingofMildSteeltoAluminumandControlofIntermetallicCompoundLayer,LaserWeldingofTailoredBlanks,Wirebondingtoadvancedcopper,low-Kintegratedcircuits,themetal/dielectricstacks,andmaterialsconsiderations,Wirebondingtoadvancedcopper-low-Kintegratedcircuits,themetal/dielectricstacks,andmaterialsconsiderations.
简介:CapitalizingonHeavy-GaugePrecisionBlanking;DamagepredictioninL-bendingprocessesusingFEM;Designandapplicationofhybridsoftwareformodellingdiecomponentsandthedieassembly;Developmentofarivetjointwithnon-circleholeusingfineblankingprocess;Developmentofoptimallayoutdesignsysteminmultiholeblankingprocess;
简介:某发动机加力泵在检修后的试车过程中出现起动转速异常并伴有杂音,分解检查发现柱塞座端面出现异常磨损。对故障加力泵转子部件进行分解,通过外观检查、磨损痕迹的宏微观特征观察、硬度和化学成分测试,对加力泵转子磨损故障的性质、原因及影响因素进行了探讨。结果表明:加力泵柱塞座端面与分油盘表面的磨损性质为磨粒磨损;加力泵转子部件磨损故障与材料质量、工作温度、外来异物、油料质量无关。综合分析认为,加力泵转子磨损与柱塞和分油盘的结构配合关系有关,即与两者之间的表面平面度、匹配面的平行度、配合间隙以及铅铟镀层厚度、均匀性和转子部件的同轴度等尺寸匹配性因素有关。
简介:在伊朗核问题恶化,美元持续走弱与全球商品市场特别是基础金属价格全线飘红、屡创新高的形势下,国际黄金价格五月上旬再度强势上扬,现货黄金创730.65美元的新高,虽然在基金的获利回吐盘的打压下,价格在五月末快速回落,但是其长期的上涨趋势仍然保持良好。金价的加速上扬是此轮行情的最显著特征,回顾黄金价格的涨势来看,从国际黄金市场进入牛市以来,价格从低位260美元涨到460美元间隔大约三年半的时间;价格从460美元到660美元只用了6个月的时间,而从660美元到今年的高点730.65美元仅用了一周的时间。从价格的横向比较来看,虽然黄金价格的逊色于原油、铜等品种,但是其波动率还是远远高于道琼斯指数。