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鑽床指主要用钻头在工件上加工孔的机床。通常钻头旋转为主运动,钻头轴向移动为进给运动。鑽床结构简单,加工精度相对较低,可钻通孔、盲孔,更换特殊刀具,可扩、锪孔,铰孔或进行攻丝等加工。
加工过程中工件不动,让刀具移动,将刀具中心对正孔中心,并使刀具转动(主运动)。鑽床的特点是工件固定不动,刀具做旋转运动。