1 , an overview :     In recent years, scientific and technological achievements CNC tool is mainly reflected in the development of multi- knife cutting function , improve its cutting edge , the adaptation speed ( Ultra High Speed ​​) , hard ( including heat and difficult to process ) , dry , fine ( super fine ) cutting and CNC machining of high efficiency cutting technology requirements. As part blank manufacturing technology advances , part blank geometry and more precise cutting margin control , CNC tool new structures, new varieties developed mainly in light and medium duty cutting within the scope and special hole machining , broaching , roll ( squeeze , crush ) pressure , milling and turning tools , such as five changes more active, supporting research and development of their respective knife fragment debris trough .     2 , CNC tool system :     In recent years there has been to "HSK" tool system developed by various manufacturers gradually replaced other types of tool development trends of the international system . European countries followed Germany DIN69893-1号HSK tool system standard , ISO committee for the development of the ISO / DIS standard . HSK tool system with dynamic and static stiffness, positioning ( circuitous turn ) good precision, high speed filling Xu (≤ 150000p.rm) and so on. Bamboo mold tool both for compliance management , and overall cost savings tool , reduce production costs. Its first applied to machining centers, CNC milling machine, gradually expanded to all types of lathes ( turning centers ) , grinding ( grinding centers ) , NC and CNC machining plane automatically generated online , using a range of tools covering almost all areas .     3 , hole machining tool categories:     In the tool category , the hole machining tool is a large family , it piecemeal reform after another, in respect of its main highlight of this new structure , new varieties briefly described as follows:     CNC Drill:     Integral drill : cutting edge drill point improvement from the symmetric linear symmetrical arc (r = 1/2D), with an increase of the cutting edge , to improve the life of the drill tip ; drill core thicker , improve its drilling stiffness , with the "S "type chisel edge ( or the center of the spiral blade ) instead of the traditional horizontal blade , reducing the axial drilling resistance, improve cross- edge life ; using different step drill tip apex and the negative edge down , raise points crumbs , chip breaking , drilling performance and precision holes ; mosaic modular hard ( superhard ) material crown ; inner hole cooling and large helix angle (≤ 40 °) structure. Recently developed a monolithic ceramic fine particles (Si3N4), Ti base class cermet material drill .     Machine clip-on drill : drill tip uses a dedicated symmetrical rectangular shaped cutting edge , radial drilling force from a balanced alternative to other indexable insert geometries , radial drilling force balanced overall synthesis indexable inserts to reduce small drilling vibration and improve self-centering drill point performance, life and hole machining accuracy . Composite ( combination ) hole machining CNC tools, CNC reamers, boring tools , taps , expansion ( countersink ) hole cutter          4 , CNC milling categories:     Integral MILLS : Carbide End Mills side of the blade with large helix angle (≤ 62 °) structure , through the center of the head end of the blade mills often showed arc ( or the center of the spiral blade ) shape, negative edge angle, increasing the length of the cutting edge , to improve the machinability smooth , precision workpiece and tool life. Meet the requirements of CNC high speed , stable three-dimensional milling technology.     Machine clip Mills : Mills from the various types of machine folder by indexable insert ( often with a three-dimensional chip breaker geometries ) a combination of lateral teeth , teeth and through the center of the blade end of the end teeth ( both short cutting edge ) , to meet the CNC high-speed, stable three-dimensional milling technology requirements.     CNC milling have adopted computer-aided design , simulation and CNC machining cutting simulation technology prototyping and manufacturing .     CNC face milling machine clip : cutter body tends to use lightweight high-strength aluminum, magnesium alloy, using a large rake angle of the cutting edge , negative edge angle, indexable inserts ( geometry variety ) with a three-dimensional chipbreaker shape.     CNC milling , hole machining tool dedicated composite applications are high-speed rotor balancing and secure clamping technology , some of the high-speed rotary cutter body also applied aerodynamics , the use of cutting edge cool Tornado in dry machining time reducing the temperature of the cutting edge , to improve tool life.     5 , turning,     Grooving, turning off the development of a set of type facing, outside the park , profiling , grooving , cutting, chamfering knife multifunction turning tool , insert clamping method using mosaic elastic blade , cutting force from the fixed position the structure is very suitable and innovative.     6 , broaching tool categories:     With the support of modern CNC machining technology, the development of a variety of special precision forming the outline of a combination broaches and car - a combination of molded pull broaching tools, with special CNC machine tools. Make the car as part of the work awarded several times to improve production efficiency , and product quality, accuracy is very stable.     7, other tool:     Automobile, motorcycle -specific small modulus involute external gears , spline shaft parts batch production process using rolling, rubbing squeeze chipless processing technology , developed special tools and special machine tools, so that a particular piece batch production efficiency several times , but the quality , accuracy is very stable. Tool     Broaching, rolling, rubbing and squeezing tool innovations composite (combined ) hole machining CNC tool often lead to great changes in the concept of the machining , and then integrated innovation and technological achievements CNC machine tool materials and special areas of society arising and economic benefits are enormous .