【正文】 s different with the traditional processing processing way. Compares with it, the highspeed cutting processing main axle rotational speed high, cuts high for the speed, the cutting quantity is small, but in the unit time material excises the quantity to increase 3 ~ 6 times actually. It take the high efficiency, the high accuracy and the high surface quality as the basic characteristic, in profession and so on in automobile industry, aerospace, mold manufacture and instrument measuring appliance has obtained the increasingly widespread application, and has obtained the significant technology economic efficiency, is the contemporary advanced manufacture technology important constituent. When with traditional way processing mold, often uses the electric spark machining, but the electrode design and makes itself is the technological process which timeconsuming takes the trouble. But after uses the highspeed cutting processing, because the narrow and small region processing realization and the high grade superficial result, let the electrode the utilization ratio reduce greatly. Moreover, makes the electrode with the high speed mill also to be possible to make the production efficiency to enhance to a new scale. The major part mold may use the highspeed cutting technology to process, like the forging die, the pression casting mold, cast with the blow molding mold and so on. Hammers the cavity body shallowly, the cutting tool life is long。 Compression casting mold size moderate, the productivity is high。 Casts with the blow molding mold general size small, quite is economical. 2 the highspeed cutting processing mold relative tradition processes the mold the superiority Enhances the productivity In the highspeed cutting the main axle rotational speed and enters for the speed enhancement, ma y enhance material removing rate. At the same time, the highspeed cutting may process the hard ponents, a many Cmmponents attipe clamps may plete thick, half essence and the precision work and so on the plete working procedure, also may meet the ponents surface quality requirements directly to the plex profile processing, therefore, the highspeed cutting craft often may save the electric spark Machining, manually rub repairs and so on the working procedure, reduces the craft route, then enhances the processing productivity greatly. The highspeed cutting processing permission use big to feed rate, enhances 5~10 times pared to the convention machining, the unit interval/unit time material excision rate may enhance 3~6 times, the process period may reduce greatly. This may use in processing needs to excise the metal massively the ponents, specially has the very vital significance regarding the aviation industry. Improvement processing precishon and surface qualhty The high rpeed engine bed must have high performance and so on rigidity and high accuracy, at the same time because cutting force low, the work piece thermal deformation reduces, the cutting tool distorts slightly, the highspeed cutting processing precision Is very high. Depth of cut small, but enters for the speed quickly, the processing surface roughness is very small, cuts when the aluminum alloy may reach ~ , when cutting steel stock may reach ~ . Compares with the conventional cutting, when highspeed cutting processing the cutting force may reduce 30% at least, this may reduce the processing regarding the processing rigidity bad ponents to distort, causes some thin wall class fine work piece the machining into possible. Because revolves high speed time the cutting tool cuts the excitation frequency is far away from the craft system39。s forced oscillation, has guaranteed the good processing condition. Because the cutting force is too small, cut the hot influence to be small, causes the cutting tool, the work piece distortion to be small, maintained the size accuracy, moreover also caused the friction between the cutting tool work piece changes is small, the cutting destruction level thinned, the residual stress was small, has realized the high accuracy, the low roughness processing. The reduced cutting produces quantity of heat Because the highspeed cutting processing is the shallow cutting, simultaneously the feed rate is very quick, the knife edge and the work piece contact length and the contact duration were short, reduced the knife edge and the work piece heat conduction, has avoided when the traditional processing met everywhere in the cutting tool and the work piece to have the big calorimetry shorting, guaranteed that the cutting tool worked under the temperature not high condition, lengthened cutting tool39。s service life. As shown in Figure 1, A is time the highspeed cutting processing heat conduction process, B is the traditional processing heat conduction process. high speed processing and traditional processing heat conduction The highspeed cutting processing process is extremely rapid, 95% above cutting quantity of heat are extremely few, ponents not because the temperature rise will cause the warp or the inflation distortion. The highspeed cutting is suitable specially for the processing easy thermal deformation ponents. Is low regarding the processing melting point the metal which, easy to oxidize (for example magnesium), the highspeed cutting has certain significance. advantageoued in the processing thin wall ponents Time highspeed cutting39。s cutting force is small, has the high stability, but the high quality processes the thin wall ponents. Uses as shown in Figure 2 the lamination down milling the processing method, but highspeed cutting wall thickness , wall high 20mm thin wall ponents. This time, the knife edge and the work piece contact duration was short, has avoided the sidewall distortio