This article focuses on the problems of low machining efficiency,high machining cost,and poor machining accuracy in the ma-chining of typical combination's connection holes.By improving the drill bit,designing the bit limiting fixture,and optimizing the drilling process,the drilling accuracy and machining efficiency have been improved.This improvement significantly reduces the number of feed times during the machining process of connecting holes,avoids manual measurement during the machining process,and improves machining effi-ciency;Avoiding measurement errors in hole depth,improving machining quality,and reducing work costs,it has been successfully applied to the machining of connecting holes in a double-layer segmented combination.
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