Specifically for machining deep hole drills. In the machining hole depth usually greater than the pore diameter hole 6 is known as deep. When deep drilling, cooling and chip removal difficult, and because of poor drill slender and rigid, prone to bending and vibration. With the pressure of the cooling system are generally required to solve the problem of cooling and chip removal.

Today, we talk about deep drilling of different categories:

Deep drilling by BTA way into outer and inner chip chip categories. Outside the chip of a gun drilling, deep hole drilling and deep hole twist flat like; BTA different due to the use of processing systems, sub-BTA deep hole drilling, deep hole injection drilling and DF three kinds.

① gun drill: Only one cutting portion, the first for the processing of the barrel. When drilling, cutting fluid from the drill pipe into the middle, the drill head holes injected into the cutting area, and then discharged from the drill cuttings with a V-shaped groove. Gun drill is suitable for processing aperture 2 to 20 mm, hole depth and hole aperture ratio of greater than 100.

②BTA deep drilling: cutting fluid from the drill hole wall gap was fed by the pressure of cutting fluid is discharged from the chips inside the drill pipe in the hole. BTA deep hole drilling aperture suitable for more than 6 mm, hole depth and hole aperture ratio is less than 100, its production efficiency than the gun drill more than three times higher.

③ injection drilling: In a multi-blade BTA deep hole drilling, have inner and outer layers drill pipe, most cutting fluid into the cutting area from inside and outside the drill pipe gap, then along with cuttings into the tube; another a small portion of the cutting fluid goes through the crescent-shaped hole in the tube end of the inner tube, an ejection effect, a low pressure area to help suction the chip. Jet drilling without demanding cutting fluid sealing device for drilling more than 18 mm in diameter, hole depth and hole aperture ratio is less than 100.

④DF deep drilling: This drill absorb the advantages of BTA deep hole drilling and injection drilling, the use of a single tube, chip by pressing and suction dual role, improved chip capacity, drilling aperture of 8 mm or more deep.

Gun Drills High-speed steel or carbide manufacturing used. BTA deep hole drilling within various types according to size, welded or mechanical clip-indexable carbide blade structure. Deep drill guide block serves as a guide and centering, reduce deflection and vibration when cutting drilling. Deep drilling of teeth and disposed guide block major consideration equilibrium points debris and cutting radial forces. The cutter body with the drill welding or side thread connection is available.

Tools Co., Ltd. Changzhou good to Main carbide cutting tools, all kinds of drills, milling cutters and other products, welcome to buy Oh!