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環件(jian)(jian)軋制再鍛件(jian)(jian)中的應(ying)用

文章來源：sjzwx 更(geng)新(xin)時(shi)間：2015-03-10 09:41:58

    環件軋制又稱環件輾擴或擴孔，主要是借助環件軋機和軋制孔型，使環件產生連續局部塑性變形，進而實現壁厚減小、直徑擴大、截面輪廓成形的塑性加工工藝。迄今為止，矩形截面環件的生產多以徑向軋制方式進行，環件與坯料采用等髙設計，錐輥僅起到防止環件攀升和限制環件高度增加的作用，軸向變形量很小。對于高溫合金和鈦合金等難變形材料，均勻充分的變形是保證鍛件冶金質量的(de)(de)(de)(de)重(zhong)要基礎。實(shi)際上，徑7軸(zhou)雙向(xiang)軋(ya)(ya)(ya)制(zhi)(zhi)可以(yi)在(zai)(zai)徑向(xiang)和(he)(he)軸(zhou)向(xiang)2個方向(xiang)上實(shi)施軋(ya)(ya)(ya)制(zhi)(zhi)變(bian)形(xing)(xing)，不(bu)僅(jin)可以(yi)獲(huo)(huo)得(de)更(geng)復雜的(de)(de)(de)(de)環(huan)(huan)(huan)(huan)(huan)件(jian)(jian)(jian)(jian)截面形(xing)(xing)狀(zhuang)和(he)(he)更(geng)高(gao)的(de)(de)(de)(de)尺寸(cun)精度(du)(du)，而且可以(yi)獲(huo)(huo)得(de)更(geng)加均勻充分(fen)的(de)(de)(de)(de)變(bian)形(xing)(xing)；因此，對于航空和(he)(he)航天(tian)用(yong)難(nan)變(bian)形(xing)(xing)材(cai)料(liao)環(huan)(huan)(huan)(huan)(huan)件(jian)(jian)(jian)(jian)，徑乂(yi)軸(zhou)雙向(xiang)軋(ya)(ya)(ya)制(zhi)(zhi)技術(shu)的(de)(de)(de)(de)應(ying)(ying)用(yong)日益受到人們關注(zhu)。環(huan)(huan)(huan)(huan)(huan)件(jian)(jian)(jian)(jian)軋(ya)(ya)(ya)制(zhi)(zhi)是連續局(ju)部塑性加工成(cheng)(cheng)形(xing)(xing)工藝，與整(zheng)體(ti)模鍛成(cheng)(cheng)形(xing)(xing)工藝相比，其具有大(da)(da)幅度(du)(du)降(jiang)低設備噸位和(he)(he)投資(zi)、振(zhen)動沖擊小、節能(neng)(neng)節材(cai)和(he)(he)生(sheng)產成(cheng)(cheng)本(ben)低等顯著(zhu)技術(shu)經濟(ji)優點，是軸(zhou)承環(huan)(huan)(huan)(huan)(huan)、齒輪(lun)環(huan)(huan)(huan)(huan)(huan)、法蘭環(huan)(huan)(huan)(huan)(huan)、火車(che)車(che)輪(lun)及輪(lun)箍、燃氣輪(lun)機(ji)環(huan)(huan)(huan)(huan)(huan)等各(ge)類無縫環(huan)(huan)(huan)(huan)(huan)件(jian)(jian)(jian)(jian)的(de)(de)(de)(de)先進制(zhi)(zhi)造技術(shu)，在(zai)(zai)機(ji)械、汽車(che)、火車(che)、船舶、石油化工、航空航天(tian)和(he)(he)原(yuan)子能(neng)(neng)等許多(duo)(duo)工業領(ling)域中(zhong)得(de)到日益廣(guang)泛的(de)(de)(de)(de)應(ying)(ying)用(yong)。環(huan)(huan)(huan)(huan)(huan)件(jian)(jian)(jian)(jian)軋(ya)(ya)(ya)制(zhi)(zhi)技術(shu)是目前生(sheng)產高(gao)性能(neng)(neng)無縫環(huan)(huan)(huan)(huan)(huan)件(jian)(jian)(jian)(jian)最(zui)為有效的(de)(de)(de)(de)手段(duan)之(zhi)一，在(zai)(zai)航空、航天(tian)、能(neng)(neng)源和(he)(he)交通等諸多(duo)(duo)領(ling)域獲(huo)(huo)得(de)廣(guang)泛應(ying)(ying)用(yong)。軋(ya)(ya)(ya)制(zhi)(zhi)過程(cheng)中(zhong)，環(huan)(huan)(huan)(huan)(huan)件(jian)(jian)(jian)(jian)材(cai)料(liao)變(bian)形(xing)(xing)充分(fen),充填良好，實(shi)現了近(jin)凈成(cheng)(cheng)形(xing)(xing)，使(shi)得(de)流(liu)線(xian)沿零(ling)件(jian)(jian)(jian)(jian)形(xing)(xing)狀(zhuang)合理分(fen)布(bu)，最(zui)大(da)(da)程(cheng)度(du)(du)地減少了流(liu)線(xian)的(de)(de)(de)(de)切(qie)斷和(he)(he)末(mo)端外露，從而大(da)(da)大(da)(da)提高(gao)了環(huan)(huan)(huan)(huan)(huan)件(jian)(jian)(jian)(jian)的(de)(de)(de)(de)抗應(ying)(ying)力腐(fu)蝕能(neng)(neng)力、使(shi)用(yong)壽命和(he)(he)可靠(kao)性。