彈簧設(shè)計標準版課件

泰州成興汽車部件有限公司彈簧設(shè)計◆彈簧的分類彈單分on彈簧的分類有多種,一般按照如下區(qū)分:◆根據(jù)使用的材料分Accordingtotheu圖ingmatea么gSpringhasavarietyofclassification.Generally,sprin金材。鐵制彈簧「合金鋼彈簧AlloysteelFerr其Metal他Theothers非獲屬彈「銅合金彈簧Cooperalloymaterial簧鎳命的詳簧NickelalloyspringsNon-ferrous其他Theothers〔橡膠彈簧rubbersprings非金屬材料人流體彈簧門luidspringsNonmetalmate合成樹脂彈黃syntheticresinsprings其他類彈簧theothersprings◆根據(jù)形狀分:Accordingtotheappearance壓縮彈簧compressionsprings螺旋彈簧Heil拉伸彈簧compressionspringssprings扭轉(zhuǎn)彈簧torsion板(片)彈簧Leafspringssprings特種彈簧Special常用的三種彈其他嬋簧theother簧SThecommor常用的三種彈簧的介紹Theintroductionofthreecommonsprings壓縮彈簧CompressionspringCompressionSpringsarespringswhichabsorbandstoreenergyresistancetoapushingforce.Mostcompressionspringsareacolumniformspringmadeofroundwire壓縮彈簧是通過推壓彈簧來存儲能量的,大部分的壓簧是直的圓柱型圓鋼絲彈簧拉伸彈簧ExtensionspringsExtensionSpringsarespringswhichabsorbandstoreenergybyofferingresistancetoapullingforce.Typically,extensionspringsaremadefromwireandareclosewoundwithinitialtension拉在量過拉彈簧來存儲能量的,在初給狀態(tài),大部分拉貪是圓扭轉(zhuǎn)彈簣torsionspringsAtorsionspringisaspringthatworksbytorsionortwisting;thatis,aflexibleelasticobjectthatstoresmechanicalenergywhenitistwisted.Thearmsofthetorsionspringsrotatea扭轉(zhuǎn)彈簧力是通過是通過扭轉(zhuǎn)彈簧來存儲能量的,彈簧的臂是圍繞一個中心軸在轉(zhuǎn)動的Point(A]rotatesinanareaboutthecenteroftheshaft常用材料介紹錳、鉻一釩及鉬等金屬元素于鋼中,以增加彈單b.大型彈簧多用熱作酸南魔加工成形后凈義于70度再用冷捲成后再經(jīng)硬化回琴鋼絲或鋼不絲用易處受高可用高進的榜初化處理后0.65~0械性質(zhì)佳,抗g板彈常用09-10%之普通鋼,其較高級者則使用鉻釩鋼及矽錳鋼三、彈簧材料的強度和的特性Strengthofmaterialsandmaterialproperties3.1材料的幾個強度定義Definitionsofsomestrengthofmaterials極限抗拉強度UItimatetensilestrength-Sut(單位unt:MPa)抗拉強度指材料在拉斷前承受最大應(yīng)力值Ultimatetensilestrengthisdefinedasthestressatwhichamaterialbebreak.(ThemaximumstressamaterialcanwithstandwhensubjectedtoSu可以通過查詢手冊得到,也可以通過以下公式計算ThevaluesofSutcanselectfromsomespringhandbooks,alsocanalculateaccordingtothefollowingformulasSu=1960000146ntps單位為英制的Sut=1351/(d/25.4)0.146Unit:MPa)中,d為彈簧材料的線經(jīng)。dmeanswirediameter三、彈簧材料的強度和的特性Strengthofmaterialsandmaterialproperties材料的幾個強度定Definitionsofsomestrengthofmaterials屈服強度Yieldstrength-(單位unt:MPa)屈服強度是材料開始發(fā)生永久變形或者塑性變形的應(yīng)力。Theyieldstrengthisdefinedasthestressatwhichamaterialbeginstopermanentlyorplastically剪切強度Shearstrength---Ssy(單位unt:MPa)剪切強度是指材料承受剪切力的應(yīng)力.Shearstrengthisdefinedasthestressatwhichamaterialfailsinshear三者關(guān)系見下圖(Therelationshipasfollowingfigure)彈的設(shè)計應(yīng)方Somedesignstressofsprings張應(yīng)力Tensionstress張應(yīng)力是由于軸向拉升材料所產(chǎn)生的應(yīng)力。Tensionstressisthestressstatecausedbyanappliedloadthattoelongatethematerialintheaxisoftheappliedload,intheotherwordsthestresscausedbypillingthematerial壓應(yīng)力Compressionstress壓應(yīng)力是由于軸向壓縮材料所產(chǎn)生的應(yīng)力。CompressionstressisthestressstatecausedbyanappliedloadthatactstoreducethelengthofmaterialaxIsofheapplledotherwordsthestressstatecausedbysqueezingthematerial應(yīng)formulasasfollowi彈的設(shè)計應(yīng)方Somedesignstressofsprings彎曲應(yīng)力Bendingstress彎曲應(yīng)力是由于彎曲材料所產(chǎn)生的應(yīng)力Bendingstressisthestressstatecausedbyanappliedloadthattendstobendthematerialintheaxisofthe