馬達(dá)殼多道次拉深成形過程數(shù)值模擬

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1、馬達(dá)殼多道次拉深成形過程數(shù)值模擬摘要在板料拉深生產(chǎn)中，經(jīng)常遇到零件所要求的變形程度超過材料一次成形所允許的最大變形程度的情況，零件無法一次拉深成形，必須采用多道次拉深成形。因此深入研究板料在成形過程中的流動(dòng)規(guī)律，預(yù)測可能出現(xiàn)的缺陷，充分考慮各參數(shù)對成形過程的影響，這對于指導(dǎo)實(shí)際工藝設(shè)計(jì)、減少模具開發(fā)周期，具有重要意義。本文在介紹板料成形數(shù)值模擬理論及數(shù)值模擬計(jì)算的基礎(chǔ)上，對馬達(dá)殼內(nèi)孔的拉深進(jìn)行了工藝分析，得出一套合理的工藝方案，并對其各個(gè)步驟進(jìn)行數(shù)值模擬。在進(jìn)行多道次拉深模擬的時(shí)候，著重研究了板料毛坯厚度變化和殘余應(yīng)力信息的傳遞問題。通過模擬，獲得了各個(gè)步驟拉深

2、成形時(shí)的成形極限圖和厚度圖，并將數(shù)值模擬的結(jié)果與實(shí)驗(yàn)實(shí)測結(jié)果進(jìn)行了對比，與實(shí)驗(yàn)的結(jié)果基本吻合。最后，對不同參數(shù)下的板料拉深過程進(jìn)行了模擬。獲得了影響成形質(zhì)量的～些關(guān)鍵參數(shù)：如材料性能參數(shù)、凹模圓角半徑、摩擦系數(shù)工藝參數(shù)對板料的成形厚度和總成形力的影響規(guī)律，為拉深工藝參數(shù)的合理選擇提供了依據(jù)。關(guān)鍵詞：多道次拉深，數(shù)值模擬，馬達(dá)殼NumericalSimulationofMulti—stageFormingProcessofMotorShellAbstractMulti-stagedeepdrawingisanimportantsheetmetalformingpr

3、ocess．Multi·stagedeepdrawingisoftenusedwhenthedeformationofasheetmetalpartexceedsallowabledeformationofthematerial．Sowestudytherulesofthemetalflowing，forecastthedeficiencyandconsidertheinfluenceoftheparametersinthedeformation．Theseareveryvaluableinguidingmulti—stagepracticeandphysica

4、lsimulation，reducingnumericalsimulationelTor，reducingthepercentofdefectedpartsandforwardingtheusingofadvancedmanufacturetechnologyinthesheetmetalformingfield．Basedonthedeepanalysisofnumericalsimulationtheoryandnumericalsimulationcalculationofthesheetmetalforming，thisarticleinvestigat

5、edtheprocessofthemotorshellholeforming，gotthereasonableprocessprogram．，anddidnumericalsimulationoneachstep．Inthemulti-stagede印drawing，westudiedthepassingoftheblankthicknesschangingandremnantstress．Withthenumericalsimulation，wegottheFormingLimitedDiagram(FLD)andthethicknessdiagramofth

6、emotorshellineachstepwhendrawing，andcomparedthemwiththeexperiment．Theresultofnumericalsimulationwasanastomotie、杭ththeresultoftheexperiment．Atlast，thisarticledidthenumericalsimulationindifferentparameterssuchasmaterialparameters，dieradiusofcomerandfrictioncoefficientinsheetmetalformin

7、g．Theruleswhichvariousparametersinfluenceblankthicknessandtotaiformingforceareobtained，anditsprovidetheoreticalevidenceforchoosingtheoptimalparameters．Keywords：multi-stagedeepdrawing，numericalsimulation，motorshell插圖清單圖1．1金屬板料沖壓件設(shè)計(jì)和生產(chǎn)中數(shù)值模擬的應(yīng)用???·圖2-1笛卡兒坐標(biāo)系內(nèi)物體的運(yùn)動(dòng)和變形????????·圖2．2微體變形前后的

8、作用力?????????