【正文】 craftThe high speed processing including take removes the remainder as the goal rough machining, the residual rough machining, as well as take gains the high grade processing surface and the slight structure as the goal half precision work, the precision work and the mirror surface processing and so on.1. Rough machiningThe mold rough machining essential target is pursues in the unit time material removing rate, and is half precision work preparation work piece geometry outline. In the high speed processing rough machining should adopt the craft plan is the high cutting speed, Gao Jin giving rate and the small cutting specifications bination. The contour processing way is one processing way which the multitudinous CAM software uses generally. Using is spiral contour and so on the Z axis contour two ways which are many, also is in processes the region only time to feed, in does not lift the knife in the situation to produce continuously the smooth cutting tool way, enters, draws back the knife way to use the circular arc to cut into, to cut. The spiral contour way characteristic is, has not waited the high level between the knife road migration, may avoid frequently lifting the knife, feeding to the ponents surface quality influence and mechanical device nonessential consuming. To is steep and the flat site processes separately, the putation suits contour and suits the use similar 3D bias the region, and may use the spiral way, in very little lifts the cutting tool way which the knife in the situation produces optimizes, obtains the better surface quality. In the high speed processing, certainly must adopt the circular arc to cut into, to cut the connection way, as well as the circular arc transition, avoids changing the cutting tool to enter suddenly for the direction, the prohibition use direct under knife connection way, avoids burying the cutting tool the work piece. When processes the mold cavity, should avoid the cutting tool vertical insertion work piece under, but should use inclines the knife way (monly used angle of bank for 20176。模具高速加工技術目前已在發(fā)達國家的模具制造業(yè)中普遍應用，而在我國的應用范圍及應用水平仍有待提高，由于其具有傳統(tǒng)加工無可比擬的優(yōu)勢，仍將是今后加工技術必然的發(fā)展方向Mold high speed milling processing technologyThe abstract Introduced the high speed milling in the mold processing application as well as the influence, and brief introduction high speed milling engine bed structure, control system and cutting tool. Has carried on the simple analysis to the high speed processing craft.Key word high speed milling。如MasterCAM軟件提供了束狀銑削(Pencil milling)和剩余銑削(Rest milling)等方法來清除粗加工后剩余加工余量較大的角落以保證后續(xù)工序均勻的加工余量。刀具切入、切出工件時應盡可能采用傾斜式(或圓弧式)切入、切出，避免垂直切入、切出。應用較多的是螺旋等高和等Z軸等高兩種方式，也就是在加工區(qū)域僅一次進刀，在不抬刀的情況下生成連續(xù)光滑的刀具路徑，進、退刀方式采用圓弧切入、切出。在保證安全和滿足加工要求的條件下，刀具懸伸盡可能短，刀體中央韌性要好。高速切削鋼材時，刀具材料應選用熱硬性和疲勞強度高的P類硬質合金、涂層硬質合金、立方氮化硼（CBN）與CBN復合刀具材料（WBN）等。三、 高速切削加工的刀具刀具是高速切削加工中最活躍重要的因素之一，它直接影響著加工效率、制造成本和產品的加工精度。 d. 預處理(Lookahead)功能。(2) 高的加速度。2. 機床主軸高速機床的主軸性能是實現高速切削加工的重要條件。高速加工技術除可應用于淬硬模具型腔的直接加工(尤其是半精加工和精加工)外，在EDM電極加工、快速樣件制造等方面也得到了廣泛應用。相對于傳統(tǒng)的切削加工，其切削速度、進給速度有了很大的提高，而且切削機理也不相同。對高速加工的工藝進行了簡單的分析。同時，高速加工的小量快進使切削力減少了，切屑的高速排出減少了工件的切削力和熱應力變形，提高了剛性差和薄壁零件切削加工的可能性。由于模具加工的特殊性以及高速加工技術的自身特點，對模具高速加工的相關技術及工藝系統(tǒng)(加工機床、數控系統(tǒng)、刀具等)提出了比傳統(tǒng)模具加工更高的要求。潤滑多采用油氣潤滑、噴射潤滑等技術。隨著電機技術的發(fā)展，先進的直線電動機已經問世，并成功應用于CNC機床。 此外，模具高速切削加工對數據傳輸速度的要求也很高。在加工鑄鐵和合金鋼的切削刀具中，硬質合金是最常用的刀具材料。選擇切削參數時，針對圓刀片和球頭銑刀，應注意有效直徑的概念。球頭立銑刀要考慮有效切削長度，刃口要盡量短，兩螺旋槽球頭立銑刀通常用于粗銑復雜曲面，四螺旋槽球頭立銑刀通常用于精銑復雜曲面。在高速加工中，一定要采取圓弧切入、切出連接方式，以及拐角處圓弧過渡，避免突然改變刀具進給方向，禁止使用直接下刀的連接方式，避免將刀具埋入工件。 粗加工是基于體積模型，精加工則是基于面模型。然而，由于加工中表面斜率的變化，如果只定義加工的側吃刀量(Step over)，就可能造成在斜率不同的表面上實際步距不均勻，從而影響加工質量。 research and development departments in design process, but also uses the modality analysis and the finite element structure putation and so on, optimized the structure, stably causes the engine bed strut part to be reliable.2. Engine bed main axleThe high speed engine bed main axle performance is the realization highspeed cutting processing important condition. The highspeed cutting engine bed main axle rotational speed scope is 10000~100000m/Min, the main axle power is bigger than 15kW. Is not bigger than through the main axle pressed air of or axial play between the cooling system control hilt and the main axle. Also requests the main axle to have the fast vertical speed, to assign the performance which the position is fast stops (namely to have extremely high angle addition and subtraction speed), therefore the high speed main axle often uses the liquid static pressure bearing type, the air static pressure bearing type, the thermopression nitriding silicon (Si3N4) the ceramic bearing magnetism aerosol bearing type isostructuralism form. Lubricates uses technology and so on oil gas lubrication, splash lubrication. The main axle cools uses the main axle interior water cooling generally or air cooled.3. The engine bed actuates the systemIn order to satisfy the mold high speed processing the need, high speed processes the engine bed the actuation system to be supposed to have the following characteristic:(1) high entering for speed.The research indicated that, regarding the minor diameter cutting tool, enhances the rotational speed and each tooth enters for the quantity is advantageous in reduces the cutting tool attrition. At present monly used entering for the speed range is 20~30m/Min, like uses leads greatly the ball bearing guide screw transmission, enters may reach 60m/ for the speedMin。s application scope and the application level the enhancement, because it had the tradition to process the inparable superiority, still will be the next processing technology inevitable development direction.13 /