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汽車沖壓模具的CAE回彈分析

關鍵詞:汽車模具 沖壓模具 回彈分析 信息發布:汽車模具廠 東莞市長東模(mo)(mo)具(ju)(ju)有(you)限公司(si)開發、制(zhi)造(zao)各類型五(wu)金(jin)模(mo)(mo)具(ju)(ju),擅長制(zhi)作(zuo)4米(mi)以(yi)內的(de)(de)(de)大型五(wu)金(jin)沖(chong)壓(ya)(ya)(ya)(ya)模(mo)(mo)具(ju)(ju)。在(zai)模(mo)(mo)具(ju)(ju)開發制(zhi)造(zao)過(guo)程(cheng)(cheng)(cheng)中(zhong)(zhong),五(wu)金(jin)沖(chong)壓(ya)(ya)(ya)(ya)回(hui)(hui)(hui)彈(dan)是(shi)汽車(che)模(mo)(mo)具(ju)(ju)試模(mo)(mo)調試過(guo)程(cheng)(cheng)(cheng)中(zhong)(zhong)經(jing)常遇到(dao)的(de)(de)(de)問題,特別是(shi)屈服強(qiang)(qiang)度(du)600Mpa以(yi)上(shang)的(de)(de)(de)高強(qiang)(qiang)鋼(gang)(gang)材(cai)料(liao)(liao)(liao),目前(qian)還沒有(you)一(yi)(yi)個完美的(de)(de)(de)方(fang)法(fa)根治沖(chong)壓(ya)(ya)(ya)(ya)件(jian)(jian)(jian)回(hui)(hui)(hui)彈(dan),東莞長東公司(si)的(de)(de)(de)工程(cheng)(cheng)(cheng)團隊善于運用AUTOFORM軟(ruan)件(jian)(jian)(jian)進行CAE回(hui)(hui)(hui)彈(dan)分(fen)(fen)(fen)析,計算沖(chong)壓(ya)(ya)(ya)(ya)回(hui)(hui)(hui)彈(dan)補(bu)償量,根據經(jing)驗總結(jie),影響(xiang)(xiang)沖(chong)壓(ya)(ya)(ya)(ya)回(hui)(hui)(hui)彈(dan)的(de)(de)(de)因素有(you): 1. 沖(chong)壓(ya)(ya)(ya)(ya)材(cai)料(liao)(liao)(liao)性(xing)能(neng)(neng)  在(zai)汽車(che)身(shen)上(shang)有(you)不(bu)同強(qiang)(qiang)度(du)的(de)(de)(de)汽車(che)沖(chong)壓(ya)(ya)(ya)(ya)件(jian)(jian)(jian),從(cong)(cong)(cong)普通板(ban)(ban)材(cai)到(dao)高強(qiang)(qiang)板(ban)(ban),不(bu)同板(ban)(ban)材(cai)有(you)著(zhu)不(bu)同的(de)(de)(de)屈服強(qiang)(qiang)度(du),板(ban)(ban)材(cai)的(de)(de)(de)屈服強(qiang)(qiang)度(du)越高,就越容易(yi)出(chu)(chu)現(xian)回(hui)(hui)(hui)彈(dan)現(xian)象(xiang)(xiang)。例如(ru)S500MC,DP780這些材(cai)料(liao)(liao)(liao)冷(leng)成(cheng)(cheng)(cheng)(cheng)型性(xing)能(neng)(neng)良(liang)好的(de)(de)(de)高強(qiang)(qiang)度(du)鋼(gang)(gang)板(ban)(ban)。 2. 沖(chong)壓(ya)(ya)(ya)(ya)材(cai)料(liao)(liao)(liao)厚度(du)  在(zai)五(wu)金(jin)沖(chong)壓(ya)(ya)(ya)(ya)加工成(cheng)(cheng)(cheng)(cheng)形(xing)(xing)過(guo)程(cheng)(cheng)(cheng)中(zhong)(zhong),板(ban)(ban)料(liao)(liao)(liao)厚度(du)對彎(wan)曲(qu)性(xing)能(neng)(neng)有(you)很大的(de)(de)(de)影響(xiang)(xiang),隨著(zhu)板(ban)(ban)料(liao)(liao)(liao)厚度(du)增加,回(hui)(hui)(hui)彈(dan)現(xian)象(xiang)(xiang)會(hui)逐(zhu)漸減(jian)(jian)少,這是(shi)因為(wei)隨著(zhu)板(ban)(ban)料(liao)(liao)(liao)厚度(du)增加,參與(yu)塑性(xing)變(bian)形(xing)(xing)材(cai)料(liao)(liao)(liao)增加,進而(er)彈(dan)性(xing)回(hui)(hui)(hui)復(fu)變(bian)形(xing)(xing)也增加,因此,回(hui)(hui)(hui)彈(dan)變(bian)小(xiao)。 3. 沖(chong)壓(ya)(ya)(ya)(ya)零(ling)件(jian)(jian)(jian)形(xing)(xing)狀(zhuang)  不(bu)同形(xing)(xing)狀(zhuang)的(de)(de)(de)零(ling)件(jian)(jian)(jian)回(hui)(hui)(hui)彈(dan)差異很大,形(xing)(xing)狀(zhuang)復(fu)雜的(de)(de)(de)零(ling)件(jian)(jian)(jian)一(yi)(yi)般都(dou)會(hui)增加一(yi)(yi)序(xu)整(zheng)形(xing)(xing),防止成(cheng)(cheng)(cheng)(cheng)形(xing)(xing)不(bu)到(dao)位(wei)出(chu)(chu)現(xian)回(hui)(hui)(hui)彈(dan)現(xian)象(xiang)(xiang),而(er)更(geng)(geng)有(you)一(yi)(yi)部(bu)分(fen)(fen)(fen)特殊形(xing)(xing)狀(zhuang)零(ling)件(jian)(jian)(jian)比較(jiao)容易(yi)出(chu)(chu)現(xian)回(hui)(hui)(hui)彈(dan)現(xian)象(xiang)(xiang),如(ru)U型零(ling)部(bu)件(jian)(jian)(jian),在(zai)分(fen)(fen)(fen)析成(cheng)(cheng)(cheng)(cheng)形(xing)(xing)過(guo)程(cheng)(cheng)(cheng)中(zhong)(zhong),必須考慮沖(chong)壓(ya)(ya)(ya)(ya)模(mo)(mo)具(ju)(ju)回(hui)(hui)(hui)彈(dan)補(bu)償事宜。目前(qian)歐美客(ke)戶(hu)普遍要求在(zai)沖(chong)壓(ya)(ya)(ya)(ya)模(mo)(mo)具(ju)(ju)工藝設(she)計階段(duan)就要處理好回(hui)(hui)(hui)彈(dan)補(bu)償,把(ba)回(hui)(hui)(hui)彈(dan)做到(dao)產品公差要求范圍以(yi)內。 4. 汽車(che)五(wu)金(jin)模(mo)(mo)具(ju)(ju)壓(ya)(ya)(ya)(ya)邊圈壓(ya)(ya)(ya)(ya)邊力(li)  壓(ya)(ya)(ya)(ya)邊力(li)沖(chong)壓(ya)(ya)(ya)(ya)加工成(cheng)(cheng)(cheng)(cheng)形(xing)(xing)過(guo)程(cheng)(cheng)(cheng)是(shi)一(yi)(yi)項(xiang)重要的(de)(de)(de)工藝措(cuo)施,通過(guo)不(bu)斷優(you)化壓(ya)(ya)(ya)(ya)邊力(li),可(ke)以(yi)調整(zheng)材(cai)料(liao)(liao)(liao)流動方(fang)向(xiang),改(gai)(gai)善材(cai)料(liao)(liao)(liao)內部(bu)應(ying)力(li)分(fen)(fen)(fen)布(bu)。壓(ya)(ya)(ya)(ya)邊力(li)增大可(ke)以(yi)使零(ling)件(jian)(jian)(jian)拉(la)(la)延(yan)更(geng)(geng)加充分(fen)(fen)(fen),特別是(shi)零(ling)件(jian)(jian)(jian)側(ce)壁與(yu)R角位(wei)置(zhi),如(ru)果(guo)成(cheng)(cheng)(cheng)(cheng)形(xing)(xing)充分(fen)(fen)(fen),會(hui)使內外應(ying)力(li)差減(jian)(jian)少,從(cong)(cong)(cong)而(er)使回(hui)(hui)(hui)彈(dan)減(jian)(jian)小(xiao)。 5. 汽車(che)模(mo)(mo)具(ju)(ju)拉(la)(la)延(yan)筋(jin)  拉(la)(la)延(yan)筋(jin)在(zai)當(dang)今工藝中(zhong)(zhong)應(ying)用較(jiao)為(wei)廣泛,合理的(de)(de)(de)設(she)置(zhi)拉(la)(la)延(yan)的(de)(de)(de)位(wei)置(zhi),能(neng)(neng)夠有(you)效(xiao)地改(gai)(gai)變(bian)材(cai)料(liao)(liao)(liao)流動方(fang)向(xiang)及有(you)效(xiao)分(fen)(fen)(fen)配壓(ya)(ya)(ya)(ya)料(liao)(liao)(liao)面上(shang)的(de)(de)(de)進料(liao)(liao)(liao)阻力(li),從(cong)(cong)(cong)而(er)提高材(cai)料(liao)(liao)(liao)成(cheng)(cheng)(cheng)(cheng)形(xing)(xing)性(xing),在(zai)容易(yi)出(chu)(chu)現(xian)回(hui)(hui)(hui)彈(dan)的(de)(de)(de)零(ling)件(jian)(jian)(jian)上(shang)設(she)置(zhi)拉(la)(la)延(yan)筋(jin),會(hui)使零(ling)件(jian)(jian)(jian)成(cheng)(cheng)(cheng)(cheng)形(xing)(xing)更(geng)(geng)充分(fen)(fen)(fen),應(ying)力(li)分(fen)(fen)(fen)布(bu)更(geng)(geng)均勻,從(cong)(cong)(cong)而(er)回(hui)(hui)(hui)彈(dan)減(jian)(jian)小(xiao)。


  綜合以上因素,為節省汽車模具調模時間及降低后續的改模成本,汽車模具沖壓工藝確(que)定前,普遍需要用CAE仿真軟(ruan)件做回彈分析,及做回彈補(bu)償并不斷(duan)修正,常用的軟(ruan)件有 Autoform, Dynaform 及JStamp等(deng)。

東莞市長東模具有限公司開發、制造各類型五金模具,包括連續沖壓模具,機械手多位傳送模具,擅長制作4米以內的(de)大(da)型汽車沖壓模具。

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