Thin plate getting

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5mm is large thin board, tin skin, thin the bore on aluminium board, brass skin and red copper skin, cannot use common bit, the hole that drills otherwise can appear out of round, into flash of polygonal, orifice, burr very big, laminose even twist is out of shape, aperture is torn. Big thin plate is secured very hard go up in the machine tool, if use drill of hand handholding thin plate, just got a needle when what use common twist drill when appearing, broach loses the ability of centering, workpiece happening shakes, edge is cut suddenly more, plunge into thin plate, cutting force is added urgently, make broach breaks off easily or the hand is not helped up, cause an accident. Add the thin plate of graphic representation to get, the needle is gotten to cut work first when getting, have centering effect, two sharp outside the needle is rapid among cut from, the aperture that receives a demand gets laminose efficient with it, on the safe side. Should get when cutting thicker board material, should will outside pointed wear of predestined relationship blade is short Ping Ren, in order to increase outside the intensity of needle of predestined relationship blade and improvement come loose hot condition. When getting brass skin, be in along blade point of a knife outside before horn is 0 ° . CNC Milling CNC Machining