Peculiarities of Drilling Machining
The drilling machining is one of the most difficult machiningin metal machining, cause of that:
1th: Holesmachiningare the forming machining, the design of drill bit is good or not that directlyeffects on the accuracyof bore diameter.
2nd: The blade is in the hole, cooling is difficult.
3rd: The machining is in the hole, chip removal is difficult.
4th: The quality of chip breaking is important; otherwise, it will affect the chip removal and even breaks the drill cutter.
