我國從1985年開始該機組的引進，洪都鋼管廠是第一個建設該機組的工廠。引進的是改進型的全浮動三輥軋管機，產品規格范圍從Φ63～80mm。

  所謂的改進型三輥軋管機。其結構上的區別在軋管機入口端的輥頸軸承裝在活動牌坊上，活動牌坊與一液壓缸相連。啟動液壓缸可按要求快速改變軋輥的喂人角。因為軋制薄壁管(guan)的主要問題在毛管的尾端，改進型三輥軋管機的解決辦法是在毛管尾端產生一小段壁厚較厚的毛管，以便給相鄰的薄壁管以足夠的支撐。這種解決辦法是這樣實現的。開始時，軋機的喂入角調整得較小，當毛管前端通過軋輥后，迅速將喂入角調大，然后，當軋至毛管后端時，又重新快速將喂人角調小。由于軋輥軸安裝的幾何關系，減小軋機喂入角不僅改變喂入效率，而且可打開輥喉，所以就產生一小段厚壁管。

  傳(chuan)統(tong)的(de)Assel軋(ya)(ya)管(guan)機采用1個電機傳(chuan)動，通過齒輪箱帶動3個軋(ya)(ya)輥。雖然軋(ya)(ya)輥的(de)速(su)度相同(tong)，但由(you)于(yu)(yu)軋(ya)(ya)輥上(shang)的(de)負荷分配(pei)不均。導致軋(ya)(ya)制時(shi)荒(huang)管(guan)壁厚不均和后端(duan)不圓。由(you)于(yu)(yu)尾三(san)角的(de)原因，只能生產產D／SS不大(da)于(yu)(yu)12的(de)鋼管(guan)。

  Assel軋(ya)(ya)管(guan)(guan)(guan)機組(zu)(zu)經過近一(yi)個世紀的(de)(de)(de)(de)(de)(de)(de)發展之(zhi)(zhi)(zhi)后(hou)(hou)，軋(ya)(ya)制(zhi)(zhi)(zhi)(zhi)鋼管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)直(zhi)(zhi)徑(jing)不斷(duan)加(jia)大(da)。這使(shi)(shi)得芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)變得越來越重(zhong)。由此而(er)產(chan)(chan)生(sheng)的(de)(de)(de)(de)(de)(de)(de)問題是(shi)，笨重(zhong)的(de)(de)(de)(de)(de)(de)(de)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)重(zhong)達(da)數噸，給芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)操作和運輸帶來了(le)很大(da)困難，并(bing)且(qie)直(zhi)(zhi)接影響到軋(ya)(ya)制(zhi)(zhi)(zhi)(zhi)鋼管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)質量(liang)。芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)重(zhong)量(liang)在(zai)(zai)某種程(cheng)度上制(zhi)(zhi)(zhi)(zhi)約(yue)了(le)大(da)直(zhi)(zhi)徑(jing)鋼管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)生(sheng)產(chan)(chan)。經過一(yi)段時間(jian)的(de)(de)(de)(de)(de)(de)(de)摸(mo)索(suo)之(zhi)(zhi)(zhi)后(hou)(hou)。當(dang)今(jin)限(xian)動(dong)(dong)(dong)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)Assel 軋(ya)(ya)管(guan)(guan)(guan)機組(zu)(zu)可(ke)以滿足(zu)大(da)直(zhi)(zhi)徑(jing)鋼管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)生(sheng)產(chan)(chan)。限(xian)動(dong)(dong)(dong)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)Assel軋(ya)(ya)管(guan)(guan)(guan)機的(de)(de)(de)(de)(de)(de)(de)技(ji)術特(te)點(dian)是(shi)在(zai)(zai)軋(ya)(ya)制(zhi)(zhi)(zhi)(zhi)過程(cheng)中控(kong)制(zhi)(zhi)(zhi)(zhi)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)前(qian)(qian)進(jin)(jin)速(su)度，使(shi)(shi)荒(huang)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)前(qian)(qian)進(jin)(jin)速(su)度大(da)于(yu)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)前(qian)(qian)進(jin)(jin)速(su)度，芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)前(qian)(qian)進(jin)(jin)距離遠(yuan)遠(yuan)小(xiao)于(yu)荒(huang)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)前(qian)(qian)進(jin)(jin)距離。根據限(xian)動(dong)(dong)(dong)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)上述軋(ya)(ya)制(zhi)(zhi)(zhi)(zhi)特(te)點(dian)，便(bian)可(ke)根據生(sheng)產(chan)(chan)需要確定芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)軋(ya)(ya)制(zhi)(zhi)(zhi)(zhi)長(chang)度，并(bing)通過減少軋(ya)(ya)制(zhi)(zhi)(zhi)(zhi)長(chang)度的(de)(de)(de)(de)(de)(de)(de)方法(fa)來縮短芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)長(chang)度，從而(er)減輕(qing)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)的(de)(de)(de)(de)(de)(de)(de)重(zhong)量(liang)。對(dui)Assel軋(ya)(ya)管(guan)(guan)(guan)機的(de)(de)(de)(de)(de)(de)(de)實(shi)驗研究(jiu)分(fen)析(xi)表明(ming)，浮動(dong)(dong)(dong)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)軋(ya)(ya)制(zhi)(zhi)(zhi)(zhi)與限(xian)動(dong)(dong)(dong)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)軋(ya)(ya)制(zhi)(zhi)(zhi)(zhi)之(zhi)(zhi)(zhi)間(jian)有(you)很大(da)差別，相(xiang)比之(zhi)(zhi)(zhi)下(xia)限(xian)動(dong)(dong)(dong)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)軋(ya)(ya)制(zhi)(zhi)(zhi)(zhi)具有(you)更多優點(dian)：首先，取(qu)消了(le)荒(huang)管(guan)(guan)(guan)與芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)之(zhi)(zhi)(zhi)間(jian)的(de)(de)(de)(de)(de)(de)(de)脫棒(bang)(bang)(bang)(bang)系統，不僅減少了(le)設備的(de)(de)(de)(de)(de)(de)(de)投入，還由于(yu)芯(xin)(xin)(xin)(xin)棒(bang)(bang)(bang)(bang)不參(can)與運輸而(er)使(shi)(shi)得軋(ya)(ya)制(zhi)(zhi)(zhi)(zhi)大(da)直(zhi)(zhi)徑(jing)的(de)(de)(de)(de)(de)(de)(de)鋼管(guan)(guan)(guan)成(cheng)為可(ke)能；其次，可(ke)減小(xiao)附(fu)加(jia)應力，增(zeng)大(da)減徑(jing)量(liang)，保(bao)證(zheng)了(le)軋(ya)(ya)制(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)質量(liang)。

  大(da)直(zhi)(zhi)徑(jing)(jing)Assel軋管(guan)機(ji)組(zu)上采用(yong)單獨直(zhi)(zhi)接(jie)(jie)傳動。這一結(jie)構的(de)優點是，可以騰出更多的(de)空間來布置出口臺，以生產大(da)直(zhi)(zhi)徑(jing)(jing)的(de)鋼管(guan)；可以用(yong)改變每個軋輥速(su)度的(de)方法來補償由于負荷分(fen)配(pei)不(bu)均而引起的(de)軋制(zhi)速(su)度的(de)差(cha)異，并(bing)能(neng)補償軋輥外徑(jing)(jing)不(bu)完(wan)全相(xiang)等的(de)差(cha)異。軋輥采用(yong)單獨傳動，并(bing)且(qie)為軸向出料直(zhi)(zhi)接(jie)(jie)進入定徑(jing)(jing)機(ji)，中間不(bu)設置再加熱爐，這些都是當今(jin)Assel軋管(guan)機(ji)組(zu)的(de)獨特之(zhi)處。