1903年初在Ohio的 Shelby 不銹鋼管廠及賓州的 Greenville 不銹鋼管廠試驗均已完成,其結果是進一步發展Shelby小組的試驗成果大占上風。同年5月在Shelby 不銹鋼管廠設計室開始了基于Shelby試驗的軋管機組的平面布置和設備設計,這臺軋管機將在Greenville建造,它和周期軋管機上做試驗用的軋機結構在許多方面不同,芯棒牢固地固定在后支持器上,管子全長經過頂頭后,被一擋套擋住,使它從芯棒上脫除,這一擋套由長氣缸的活塞進行操作。每軋完一個道次后,上輥可以抬起,軋機前臺的管子被置于V形槽內,在其外端有一空氣缸,其柱塞用以將管子推向頂頭,推入軋輥的軋槽。這就是后來被稱為 Automatic Mill的原始構造。但是還有一個問題沒有解決,這就是還沒有用回送輥以取代風動的擋套,將管子回送至前臺,后來的發展才解決了這一問題,回送輥也是Ohio 的Shelby廠Morse-Wirkstrom 小組的想法。


 前(qian)面(mian)提到過(guo)要設計(ji)一(yi)(yi)(yi)種裝(zhuang)置,當(dang)(dang)上(shang)輥(gun)(gun)升起(qi)時(shi)(shi)工(gong)(gong)(gong)件可(ke)以通過(guo)軋制(zhi)線回(hui)(hui)送至(zhi)軋機前(qian)臺。回(hui)(hui)送輥(gun)(gun)是(shi)一(yi)(yi)(yi)對快(kuai)速回(hui)(hui)轉的(de)(de)軋輥(gun)(gun),裝(zhuang)置在(zai)(zai)工(gong)(gong)(gong)作輥(gun)(gun)的(de)(de)后(hou)面(mian),它的(de)(de)動作和(he)工(gong)(gong)(gong)作輥(gun)(gun)的(de)(de)動作是(shi)相協調的(de)(de),當(dang)(dang)工(gong)(gong)(gong)作輥(gun)(gun)合起(qi)來軋管時(shi)(shi),回(hui)(hui)送輥(gun)(gun)就脫開不(bu)工(gong)(gong)(gong)作,當(dang)(dang)上(shang)輥(gun)(gun)抬起(qi)時(shi)(shi)回(hui)(hui)送輥(gun)(gun)將管子抱住(zhu),將它迅速送回(hui)(hui)前(qian)臺,具(ju)有上(shang)述特性的(de)(de)新(xin)設計(ji)的(de)(de)軋管機于1903年11月在(zai)(zai)Greenville 首先進(jin)行試(shi)生(sheng)(sheng)產,使以下(xia)工(gong)(gong)(gong)藝成(cheng)(cheng)(cheng)為可(ke)能(neng),即:管坯經(jing)過(guo)一(yi)(yi)(yi)次加熱穿(chuan)軋成(cheng)(cheng)(cheng)穿(chuan)孔坯,然(ran)后(hou)以大壓下(xia)量軋制(zhi)成(cheng)(cheng)(cheng)管。這(zhe)一(yi)(yi)(yi)新(xin)發(fa)展很快(kuai)就與均正(zheng)機配套,管子在(zai)(zai)軋制(zhi)后(hou)經(jing)過(guo)均正(zheng),于是(shi)自動軋管機加上(shang)均正(zheng),隨(sui)后(hou)的(de)(de)熱定徑使得生(sheng)(sheng)產可(ke)供(gong)銷售的(de)(de)熱軋成(cheng)(cheng)(cheng)品管成(cheng)(cheng)(cheng)為可(ke)能(neng),這(zhe)一(yi)(yi)(yi)夢想完全(quan)實現是(shi)在(zai)(zai)1905年。


 關于回送(song)(song)(song)輥,美(mei)國(guo)(guo)說(shuo)是(shi)Morse-Wirkstrom 小組的(de)(de)(de)主意。德(de)國(guo)(guo)的(de)(de)(de)資料稱:1898年Reinhard 曼內斯曼的(de)(de)(de)早(zao)年同(tong)(tong)事(shi)Otto Heer向Poensgn建議,當(dang)兩(liang)重式軋(ya)(ya)機(ji)軋(ya)(ya)制(zhi)完第(di)一(yi)道后抬(tai)起上輥,用回送(song)(song)(song)輥將空(kong)心坯從孔(kong)型中送(song)(song)(song)回,這(zhe)樣就避免了(le)(le)空(kong)心坯在(zai)傳送(song)(song)(song)過程(cheng)中浪費(fei)時間。Poensgn采納(na)了(le)(le)他(ta)的(de)(de)(de)建議,同(tong)(tong)年Poensgn在(zai)美(mei)國(guo)(guo)又遇到(dao)Stiefel,言下之意似乎回送(song)(song)(song)輥的(de)(de)(de)主意源自(zi)(zi)德(de)國(guo)(guo)。自(zi)(zi)動軋(ya)(ya)管(guan)機(ji)的(de)(de)(de)誕生地 Greenville 鋼(gang)管(guan)廠(chang)系屬U.S.Steel,由于試(shi)驗(yan)的(de)(de)(de)成功,1903年11月在(zai)Greenville安裝了(le)(le)第(di)一(yi)臺自(zi)(zi)動軋(ya)(ya)管(guan)機(ji),沒有回送(song)(song)(song)輥,談不上自(zi)(zi)動軋(ya)(ya)管(guan)機(ji)。美(mei)國(guo)(guo)發明(ming)的(de)(de)(de)自(zi)(zi)動軋(ya)(ya)管(guan)工藝又因(yin)為(wei)回送(song)(song)(song)輥問題(ti)和德(de)國(guo)(guo)有了(le)(le)聯系,當(dang)然這(zhe)已是(shi)發明(ming)周期(qi)軋(ya)(ya)管(guan)機(ji)11年后的(de)(de)(de)事(shi)情了(le)(le),但(dan)已成為(wei)無縫不銹鋼(gang)管(guan)工藝技術發展(zhan)史(shi)上的(de)(de)(de)一(yi)個歷史(shi)遺留(liu)問題(ti)。