龙门式铣床：床身水平布置，其两侧的立柱和连接梁构成门架的铣床。铣头装在横梁和立柱上，通常横梁可沿立柱导轨垂向移动，工作台可沿床身导轨纵向移动。用于大件加工，大型模具加工等。
龙门式铣床 gantry type milling machine ; planer type milling machine;gantry type milling machine 龙门式结构 planer type structure ; gantry structure .
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并对数控龙门镗铣床床身工作台导轨副采用开式或闭式静压导轨的理由分别进行了论述。
The reasons for selecting open or closed hydrostatic guideway on the CNC double column boring and milling machine were discussed.
龙门铣床推动工作台的进给箱以往的典型设计是双蜗轮一差动轮系式。
The design of double worm gear, differential gear trains, has been used as a typical design for years in the feed box moving bench of planomiller.
对龙门移动式镗铣床同步传动不一致性问题进行研究，用两台直线电机作为龙门柱纵向进给的传动机构。
The noncoincidental problem of synchrodrive for gantry moving milling machines is studied. Two linear motors are applied as traversing drive mechanism of gantries.
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