简介:Characteristicvaluesandtestingmethodsfordeepdrawingprocesses;Comparisonofexperimentalandsimulateresultsforamildsteelandadual-phasesteeldeformedundertensionanddeep-drawing;Computer-aidedprocessdesignsystemforaxisymmetricdeepdrawing;Contactlesson-linemeasurementofmaterialflowforclosedloopcontrolofdeepdrawing;Deepdrawingofnickelfoilandstainlesssteelfoil;
简介:Adatabaseorientedprocesscontroldesignalgorithmforimprovingdeep-drawingperformance,Afiniteelementandexperimentalstudyofsheetdeformationasinfluencedbydrawbeadendgeometry,Anoteondeepdrawingprocess:numericalsimulationandexperimentalvalidation,Anovelrolling-annealingcycleforenhanceddeepdrawingpropertiesinIFsteels,Anoveltechniqueoffrictionaideddeepdrawingusingablank-holderdividedintofoursegments.
简介:Drivesystemoptimizationofhydraulicdeepdrawingpressesfordevelopmentandcommissioning;Economicallaser-cutblanksfordeepdrawing;Effectofanisotropyandprebulgingonhydromechanica!deepdrawingofmildsteelcups;EnhancetheFormabilityofSheetMetalviaSmartTooling;Experimentalandnumericalapproachesofspringbackofhigh-performancesteelsdrawnwithu-shapedtoolsandanindustrialsidemembertool
简介:Afundamentalstudyofcanformingbythestretch-drawingprocess;Anexerciseincoldironingasthepost-forgingoperationfornet-shapemanufacture;Designofhorizontalmechanicalpressesfordeepdrawingandironingprocess;DevelopmentofsimulationcodeforcalculatingresidualstressdistributioninD-Icansproducedbyboth-sidedironingprocess;Fractureanalysisoftubedrawingwithamandrel;Improvementoffillingratioandreductionofformingpressure-atrialforformingofaspurgearmadefromthedrawncupⅡ
简介:铜拉链的拉头加工工艺,在冲裁、弯形和对折弯形后整形。使处于2.7±0.05mm空间中的倒U字形条,整形成2.60-0.15×4.3mm×63°10'的V字形条。整形后V字形条要与拉头外形的中心线对称,由于拉链的产量大,价格便宜,故铜拉头冲压整形是关键性的工序。而要从两边仅为0.05㎜的单边间隙中,将倒U字形条整形成V字形条。可采用支承块支撑拉头,压板是依靠橡皮弹力轻压拉头,并需要进行完全定位。然后,在左右斜块作用下,使安装在左右滑块上左右挤板产生挤压,将U字形条整形成V字形条。这种整形成形效果不仅使成形的效率高,而且是整形成形的对称性好,整形的质量高、价格便宜。
简介:对冷拉弹簧钢丝卷制过程中发生断裂的原因进行分析,对其卷制工艺性的影响因素进行总结.通过扫描电镜、能谱仪、光学显微镜、显微硬度测试仪、拉伸试验机等设备对多件卷制过程中发生断裂的lCrl8Ni9Ti冷拉弹簧钢丝的断口形貌、微观组织和力学性能进行对比和分析.结果表明冷拉弹簧钢丝的断裂模式为塑性断裂,断口形貌呈韧窝特征,断裂原因与材料的卷制工艺性有关;钢丝表面机械损伤会提供初始裂纹扩展源区,组织中的氮化物聚集会破坏材料的连续性,材料强度过高会降低材料的塑性余量,该3类缺陷均会加大钢丝的断裂倾向,给钢丝的卷制加工带来不利影响.因此,需要尽量避免材料表面缺陷、组织缺陷以及性能缺陷,以便提高材料的卷制工艺性.