龍門銑床(chuang)加工精度和出產(chan)(chan)率均(jun)較高，適(shi)合在成批和大量出產(chan)(chan)中加工大型工件的(de)平面和斜面。數控龍門銑床(chuang)還可以加工空(kong)間曲面和一些特(te)型零件。

　　1.龍門銑床(chuang)由立柱和頂梁構成門式布局。橫(heng)梁可沿兩立柱導(dao)(dao)軌(gui)(gui)作升(sheng)降運(yun)動。橫(heng)梁上(shang)有(you)1-2個(ge)(ge)帶筆直主(zhu)軸的銑頭，開(kai)沿橫(heng)梁導(dao)(dao)軌(gui)(gui)作橫(heng)向運(yun)動。兩立柱上(shang)還可別離設(she)備一個(ge)(ge)帶有(you)水平主(zhu)軸的銑頭，它可沿立柱導(dao)(dao)軌(gui)(gui)作升(sheng)降運(yun)動。(簡稱側洗頭)這(zhe)些銑頭可一起加工幾個(ge)(ge)外表。每(mei)個(ge)(ge)銑頭都具(ju)有(you)獨自的電動機(功率大可達150千瓦(wa))、變速組(zu)織(zhi)、操作組(zu)織(zhi)和主(zhu)軸部件等。

　　2.移動式龍(long)(long)(long)門(men)(men)銑(xian)(xian)(xian)床(chuang)(chuang)是(shi)龍(long)(long)(long)門(men)(men)銑(xian)(xian)(xian)床(chuang)(chuang)中的一(yi)種。其布(bu)局特(te)色(se)和運動方式是(shi)：龍(long)(long)(long)門(men)(men)銑(xian)(xian)(xian)床(chuang)(chuang)床(chuang)(chuang)身上(shang)(shang)(shang)裝(zhuang)設(she)有X軸導(dao)軌(gui)，龍(long)(long)(long)門(men)(men)銑(xian)(xian)(xian)床(chuang)(chuang)作(zuo)業臺跨過緊固(gu)在該(gai)(gai)床(chuang)(chuang)身上(shang)(shang)(shang)。作(zuo)業臺上(shang)(shang)(shang)方活動跨過架(jia)起有龍(long)(long)(long)門(men)(men)架(jia)。橫(heng)梁上(shang)(shang)(shang)裝(zhuang)有Y軸導(dao)軌(gui)，立柱夾持(chi)于該(gai)(gai)Y軸導(dao)軌(gui)上(shang)(shang)(shang)。Z軸導(dao)軌(gui)裝(zhuang)設(she)于橫(heng)梁拖板上(shang)(shang)(shang)，銑(xian)(xian)(xian)頭移動和立柱導(dao)軌(gui)持(chi)平行方向。

　　移(yi)動式(shi)龍門銑(xian)床(chuang)的大長處是： (1)機(ji)床(chuang)占地面積(ji)小。(2)機(ji)床(chuang)的動態(tai)呼應(ying)好(hao)。