机床夹具具有哪些功能?
① 保证加工精度:零件加工精度包括尺寸精度、几何形状和表面相互位置精度。夹具的最大功用是保证加工表面的位置精度。② 提高生产率,降低生产成本:快速将工件定位夹紧,免除了找正、对刀等,缩短辅助时间,提高了成品率,降低了成本。③ 扩大机床的加工范围:如在车床上加镗夹具,可完成镗孔加工。 ④ 减轻工人劳动强度
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