首先將(jiang)預彎邊的(de)(de)(de)鋼(gang)板在(zai)(zai)(zai)U壓(ya)力(li)機(ji)(ji)的(de)(de)(de)成(cheng)形(xing)(xing)(xing)(xing)(xing)模內(nei)(nei)壓(ya)成(cheng)U型，然后在(zai)(zai)(zai)O壓(ya)力(li)機(ji)(ji)的(de)(de)(de)成(cheng)形(xing)(xing)(xing)(xing)(xing)模內(nei)(nei)再(zai)壓(ya)成(cheng)O形(xing)(xing)(xing)(xing)(xing)焊(han)接(jie)成(cheng)管(guan)后再(zai)全體擴徑(jing)。UOE法(fa)是(shi)(shi)當今世界上最搶先的(de)(de)(de)成(cheng)形(xing)(xing)(xing)(xing)(xing)辦法(fa)之一(yi)，至今世界上已有這(zhe)(zhe)種(zhong)成(cheng)形(xing)(xing)(xing)(xing)(xing)焊(han)管(guan)機(ji)(ji)組近(jin)30套，UOE法(fa)以出(chu)產(chan)(chan)功率高和產(chan)(chan)品(pin)質量(liang)(liang)好(hao)著稱，但(dan)(dan)沒備(bei)價(jia)值(zhi)(zhi)寶(bao)貴，出(chu)資規劃大。    排輥(gun)(gun)成(cheng)形(xing)(xing)(xing)(xing)(xing)機(ji)(ji)由預成(cheng)形(xing)(xing)(xing)(xing)(xing)機(ji)(ji)架(jia)、平輥(gun)(gun)機(ji)(ji)架(jia)、邊緣曲折輥(gun)(gun)及小(xiao)排輥(gun)(gun)機(ji)(ji)架(jia)組成(cheng)，因為(wei)設(she)置了(le)許多相同(tong)(tong)的(de)(de)(de)小(xiao)排輥(gun)(gun)，使得成(cheng)形(xing)(xing)(xing)(xing)(xing)進程中(zhong)鋼(gang)板邊緣的(de)(de)(de)軌道近(jin)乎是(shi)(shi)直(zhi)(zhi)線的(de)(de)(de)，避免了(le)"邊緣拉伸"表(biao)象。CFE法(fa)成(cheng)形(xing)(xing)(xing)(xing)(xing)質量(liang)(liang)好(hao)，其(qi)產(chan)(chan)品(pin)質量(liang)(liang)與UOF法(fa)無差異。該法(fa)運用(yong)資料(liao)為(wei)熱輥(gun)(gun)帶鋼(gang)卷(juan)，這(zhe)(zhe)一(yi)點與其(qi)它(ta)(ta)成(cheng)形(xing)(xing)(xing)(xing)(xing)法(fa)均(jun)不相同(tong)(tong)。它(ta)(ta)首要適(shi)用(yong)于大批量(liang)(liang)、單一(yi)種(zhong)類鋼(gang)管(guan)的(de)(de)(de)出(chu)產(chan)(chan)，但(dan)(dan)難以出(chu)產(chan)(chan)高強度厚壁鋼(gang)管(guan)及大口徑(jing)鋼(gang)管(guan)。    輥(gun)(gun)彎成(cheng)形(xing)(xing)(xing)(xing)(xing)法(fa)將(jiang)鋼(gang)板在(zai)(zai)(zai)三輥(gun)(gun)或四輥(gun)(gun)之間經(jing)屢(lv)次滾壓(ya)成(cheng)形(xing)(xing)(xing)(xing)(xing)，此種(zhong)辦法(fa)出(chu)產(chan)(chan)出(chu)的(de)(de)(de)焊(han)管(guan)在(zai)(zai)(zai)運用(yong)功用(yong)和可靠(kao)性(xing)上均(jun)接(jie)近(jin)UOE焊(han)管(guan)。RBE法(fa)出(chu)資少(shao)，建廠快，產(chan)(chan)值(zhi)(zhi)適(shi)中(zhong)且(qie)靈活性(xing)較大，對商(shang)場適(shi)應(ying)性(xing)強，這(zhe)(zhe)些年該辦法(fa)在(zai)(zai)(zai)一(yi)些發展我****得到了(le)運用(yong)。但(dan)(dan)因為(wei)該成(cheng)形(xing)(xing)(xing)(xing)(xing)法(fa)成(cheng)形(xing)(xing)(xing)(xing)(xing)上輥(gun)(gun)中(zhong)部無支撐，受其(qi)剛度的(de)(de)(de)捆(kun)綁，成(cheng)形(xing)(xing)(xing)(xing)(xing)鋼(gang)管(guan)直(zhi)(zhi)徑(jing)不能小(xiao)于508mm（20in），降低了(le)商(shang)場占有率，我國不少(shao)管(guan)道的(de)(de)(de)直(zhi)(zhi)徑(jing)在(zai)(zai)(zai)508mm以下(xia)。    首先在(zai)(zai)(zai)水壓(ya)機(ji)(ji)上把鋼(gang)板壓(ya)成(cheng)J形(xing)(xing)(xing)(xing)(xing)，兩端壓(ya)邊后，經(jing)屢(lv)次沖壓(ya)成(cheng)形(xing)(xing)(xing)(xing)(xing)為(wei)C形(xing)(xing)(xing)(xing)(xing)，結(jie)束經(jing)半O形(xing)(xing)(xing)(xing)(xing)上模具壓(ya)成(cheng)O形(xing)(xing)(xing)(xing)(xing)。JCOE法(fa)其(qi)產(chan)(chan)品(pin)質量(liang)(liang)與UOE焊(han)管(guan)接(jie)近(jin)，而(er)作(zuo)業線價(jia)值(zhi)(zhi)遠低于UOE機(ji)(ji)組，但(dan)(dan)其(qi)出(chu)產(chan)(chan)功率低。??