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框(kuang)鍛(duan)件和模具模型的建立

文章來源：sjzwx 更新時間(jian)：2014-11-10 09:16:15

    采用Pro／E軟件對框鍛件和(he)模(mo)(mo)具進(jin)(jin)(jin)行幾何造型(xing)1為(wei)(wei)鈦(tai)(tai)合(he)金(jin)(jin)框(kuang)鍛(duan)(duan)件(jian)(jian)(jian)CAD實體(ti)圖，鍛(duan)(duan)件(jian)(jian)(jian)分(fen)耳(er)片(pian)與(yu)框(kuang)身兩部(bu)分(fen)組成(cheng)(cheng)，呈(cheng)左右對稱(cheng)結構，雙(shuang)面均(jun)帶有(you)較多(duo)的(de)(de)(de)(de)肋，鍛(duan)(duan)件(jian)(jian)(jian)重(zhong)量(liang)為(wei)(wei)90．5kg，框(kuang)身寬度(du)(du)(du)為(wei)(wei)150mm，最大長度(du)(du)(du)約為(wei)(wei)1900mm，最小(xiao)厚度(du)(du)(du)50mm。鍛(duan)(duan)件(jian)(jian)(jian)形(xing)(xing)(xing)(xing)(xing)(xing)狀復雜，尺寸(cun)大，成(cheng)(cheng)形(xing)(xing)(xing)(xing)(xing)(xing)極為(wei)(wei)困難。材(cai)料(liao)的(de)(de)(de)(de)本(ben)構方程(cheng)(cheng)(cheng)(cheng)(cheng)包含了(le)描述材(cai)料(liao)變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)(de)基本(ben)信(xin)息，它可以(yi)表征材(cai)料(liao)在(zai)熱(re)加(jia)工(gong)(gong)變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)下(xia)的(de)(de)(de)(de)流(liu)(liu)動(dong)(dong)應(ying)(ying)力對變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)溫(wen)度(du)(du)(du)、應(ying)(ying)變(bian)(bian)(bian)(bian)速率以(yi)及(ji)應(ying)(ying)變(bian)(bian)(bian)(bian)等(deng)熱(re)力參數的(de)(de)(de)(de)動(dong)(dong)態響(xiang)(xiang)應(ying)(ying)。因此(ci)，建立精確的(de)(de)(de)(de)材(cai)料(liao)塑性(xing)(xing)(xing)流(liu)(liu)動(dong)(dong)本(ben)構方程(cheng)(cheng)(cheng)(cheng)(cheng)是進(jin)(jin)(jin)行金(jin)(jin)屬塑性(xing)(xing)(xing)變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)過(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)數值(zhi)模(mo)(mo)擬的(de)(de)(de)(de)前提條件(jian)(jian)(jian)，也是進(jin)(jin)(jin)行金(jin)(jin)屬塑性(xing)(xing)(xing)加(jia)ll—T藝設計(ji)的(de)(de)(de)(de)基礎。本(ben)文選用(yong)基于應(ying)(ying)變(bian)(bian)(bian)(bian)補償的(de)(de)(de)(de)雙(shuang)曲正弦本(ben)構方程(cheng)(cheng)(cheng)(cheng)(cheng)分(fen)別(bie)對變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)溫(wen)度(du)(du)(du)、上模(mo)(mo)速度(du)(du)(du)以(yi)及(ji)摩擦因子(zi)等(deng)對變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)均(jun)勻性(xing)(xing)(xing)有(you)影(ying)響(xiang)(xiang)的(de)(de)(de)(de)參量(liang)進(jin)(jin)(jin)行模(mo)(mo)擬分(fen)析(xi)(xi)，具體(ti)工(gong)(gong)藝方案如下(xia)：變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)溫(wen)度(du)(du)(du)：1143，1173，1203K；加(jia)載(zai)速度(du)(du)(du)：0．5，5，15nam／s；摩擦因子(zi)：0．1，0．3，0．5；上模(mo)(mo)壓下(xia)行程(cheng)(cheng)(cheng)(cheng)(cheng)：51．5rrlln。分(fen)別(bie)為(wei)(wei)壓下(xia)量(liang)17ram、32mm、42mm和(he)51．5mm時(shi)鍛(duan)(duan)件(jian)(jian)(jian)變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)(de)整體(ti)情況。該圖清晰地表明了(le)TC4鈦(tai)(tai)合(he)金(jin)(jin)框(kuang)鍛(duan)(duan)件(jian)(jian)(jian)成(cheng)(cheng)形(xing)(xing)(xing)(xing)(xing)(xing)過(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)中(zhong)坯(pi)料(liao)形(xing)(xing)(xing)(xing)(xing)(xing)狀的(de)(de)(de)(de)變(bian)(bian)(bian)(bian)化過(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)。基于De~rm3D軟4~'-Y-臺(tai)，對TC4鈦(tai)(tai)合(he)金(jin)(jin)大型(xing)框(kuang)鍛(duan)(duan)件(jian)(jian)(jian)的(de)(de)(de)(de)等(deng)溫(wen)成(cheng)(cheng)形(xing)(xing)(xing)(xing)(xing)(xing)過(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)進(jin)(jin)(jin)行了(le)有(you)限元數值(zhi)模(mo)(mo)擬。通過(guo)對材(cai)料(liao)流(liu)(liu)動(dong)(dong)、鍛(duan)(duan)件(jian)(jian)(jian)充填(tian)、變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)均(jun)勻性(xing)(xing)(xing)、峰值(zhi)應(ying)(ying)力以(yi)及(ji)成(cheng)(cheng)形(xing)(xing)(xing)(xing)(xing)(xing)載(zai)荷(he)分(fen)析(xi)(xi)后(hou)發現(xian)：變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)工(gong)(gong)藝參數對TC4鈦(tai)(tai)合(he)金(jin)(jin)大型(xing)框(kuang)鍛(duan)(duan)件(jian)(jian)(jian)等(deng)溫(wen)成(cheng)(cheng)形(xing)(xing)(xing)(xing)(xing)(xing)過(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)具有(you)顯著影(ying)響(xiang)(xiang)，在(zai)鍛(duan)(duan)件(jian)(jian)(jian)成(cheng)(cheng)形(xing)(xing)(xing)(xing)(xing)(xing)過(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)中(zhong)應(ying)(ying)適當增(zeng)加(jia)變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)溫(wen)度(du)(du)(du)、降低加(jia)載(zai)速度(du)(du)(du)和(he)保持良(liang)好的(de)(de)(de)(de)潤滑條件(jian)(jian)(jian)，以(yi)期(qi)提高變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)材(cai)料(liao)的(de)(de)(de)(de)流(liu)(liu)動(dong)(dong)性(xing)(xing)(xing)，增(zeng)加(jia)坯(pi)料(liao)變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)(de)均(jun)勻性(xing)(xing)(xing)，降低峰值(zhi)應(ying)(ying)力，減小(xiao)成(cheng)(cheng)形(xing)(xing)(xing)(xing)(xing)(xing)載(zai)荷(he)。