本文選題：車窗升降板 + 彎曲成形��； 參考：《鍛壓技術(shù)》2017年05期

【摘要】：針對彎曲件汽車車窗升降板在成形過程中因板料彈性回復(fù)和殘余應(yīng)力的存在易產(chǎn)生回彈而影響零件尺寸和裝配性能的問題,借用Dynaform平臺對板料彎曲成形過程進(jìn)行數(shù)值模擬及回彈預(yù)測。針對板料厚度A、沖壓速度B、摩擦因數(shù)C和模具間隙D等4項(xiàng)影響因素設(shè)計9組不同的成形工藝參數(shù)組合,分別對板料進(jìn)行正交試驗(yàn)和重復(fù)正交試驗(yàn)(重復(fù)次數(shù)S=3)獲取回彈結(jié)果,并采用極差分析法(方案1)和方差分析法(方案2)進(jìn)行影響因素的主次排序和工藝優(yōu)化。方案1和方案2分別獲得的影響因素主次順序和優(yōu)化工藝參數(shù)組合為ABDC,A_2B_2D_3C_2和BDCA,B_2D_3C_2A_1。將兩組工藝參數(shù)進(jìn)行對比驗(yàn)證,進(jìn)而確定最佳參數(shù)組合為板料厚度A=0.9 mm,沖壓速度B=5000 mm·s~(-1),摩擦因數(shù)C=0.125,模具間隙D=1.15。利用該工藝進(jìn)行試生產(chǎn),檢測零件危險圓角處厚度為t=0.70 mm,減薄率低于25%。經(jīng)過試裝配證明,采用優(yōu)化后工藝參數(shù)成形的零件能夠滿足其使用條件下的尺寸和裝配要求。
[Abstract]:In order to solve the problem that the elastic recovery of sheet material and the existence of residual stress in the forming process of the car window of the bending parts, the size and the assembly performance of the parts are affected easily by the elastic recovery of the sheet material and the existence of the residual stress. The Dynaform platform is used to simulate the bending process of the sheet material and predict the springback. The sheet thickness is A, the stamping speed is B, the friction factor C and the die are used. 4 factors such as gap D are designed to design 9 groups of different forming process parameters. Orthogonal test and repeated orthogonal test (repetition times S=3) are used to obtain the rebound results respectively. The main and secondary order and process optimization of the influencing factors are carried out by the extreme analysis method (scheme 1) and variance analysis (scheme 2). Scheme 1 and scheme 2 are obtained respectively. The main and secondary order of the influencing factors and the combination of optimized process parameters are ABDC, A_2B_2D_3C_2 and BDCA. B_2D_3C_2A_1. is used to verify the two sets of process parameters, and the optimum combination of the parameters is A=0.9 mm, the stamping speed B=5000 mm. S~ (-1), and the friction factor is C=0.125. The thickness of the dangerous round corner is t=0.70 mm, the thinning rate is lower than 25%., and the test assembly proves that the parts formed by the optimized process parameters can meet the size and assembly requirements under the conditions of use.
【作者單位】： 貴州大學(xué)機(jī)械工程學(xué)院;
【基金】：貴州大學(xué)研究生創(chuàng)新基金(研理工2016031) 數(shù)字化精密成形技術(shù)及裝備研究生創(chuàng)新實(shí)踐基地(貴大研CXJD[2014]001)
【分類號】：TG386

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本文編號：1997039