常州電機軸根據鍛(duan)件成(cheng)(cheng)(cheng)型后 截面(mian)尺(chi)寸(cun)D 選擇砧寬W0,砧寬W0、鍛(duan)件成(cheng)(cheng)(cheng)型后 截面(mian)直(zhi)(zhi)(zhi)(zhi)(zhi)徑D、所(suo)需 小拔(ba)(ba)(ba)長(chang)(chang)直(zhi)(zhi)(zhi)(zhi)(zhi)徑D0之間 需滿足(zu)下(xia)列關系(xi)：砧寬W0＝(0.77～1.0)D, 小拔(ba)(ba)(ba)長(chang)(chang)直(zhi)(zhi)(zhi)(zhi)(zhi)徑D0＝1.5D×D/W0, 其特征在(zai)于(yu)：根據鍛(duan)件成(cheng)(cheng)(cheng)型后尺(chi)寸(cun)計算其重(zhong)(zhong)量(liang),根據該重(zhong)(zhong)量(liang)選用庫存重(zhong)(zhong)量(liang)相匹 配的坯料,如果坯料的直(zhi)(zhi)(zhi)(zhi)(zhi)徑大于(yu) 小拔(ba)(ba)(ba)長(chang)(chang)直(zhi)(zhi)(zhi)(zhi)(zhi)徑D0,根據每(mei)趟拔(ba)(ba)(ba)長(chang)(chang)壓(ya)(ya)下(xia)量(liang)在(zai) 20％-30％之間確定拔(ba)(ba)(ba)長(chang)(chang)趟數和成(cheng)(cheng)(cheng)型火次,然后進行翻(fan)轉(zhuan)、拔(ba)(ba)(ba)長(chang)(chang)工序,以達(da)到(dao)所(suo)需 尺(chi)寸(cun),拔(ba)(ba)(ba)長(chang)(chang)趟數和成(cheng)(cheng)(cheng)型火次要盡(jin)可(ke)能少；如果坯料的直(zhi)(zhi)(zhi)(zhi)(zhi)徑小于(yu) 小拔(ba)(ba)(ba)長(chang)(chang)直(zhi)(zhi)(zhi)(zhi)(zhi)徑D0, 則拔(ba)(ba)(ba)長(chang)(chang)前先對坯料進行墩粗(cu),以使坯料達(da)到(dao) 小拔(ba)(ba)(ba)長(chang)(chang)直(zhi)(zhi)(zhi)(zhi)(zhi)徑,然后進行拔(ba)(ba)(ba)長(chang)(chang)、壓(ya)(ya) 實工序,以達(da)到(dao)所(suo)需尺(chi)寸(cun)； 進行滾圓、修(xiu)整成(cheng)(cheng)(cheng)型,熱割余料和鉗把。