【正文】 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。 粗加工是基于體積模型，精加工則是基于面模型。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。隨著電機技術的發(fā)展，先進的直線電動機已經(jīng)問世，并成功應用于CNC機床。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(shù)控系統(tǒng)、刀具等)提出了比傳統(tǒng)模具加工更高的要求。對高速加工的工藝進行了簡單的分析。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。(2) 高的加速度。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(chǎn)品的加工精度。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。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。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。 Digital actuation system crawling control (Jerk control).C. Advanced inserts makes up the method (to insert based on the NURBS transect makes up), by obtains the good surface quality, the precise size and the high geometry precision. D. Pretreatment (Lookahead) function. The request has the large capacity cushion register, may read in advance and inspects many segments (for example the DMG engine bed to be possible to reach 500 segments, the Simens system may reach a 1000~2000 segment), in order to when is processed the superficial shape (curvature) changes may promptly adopt changes for measure and so on speed by avoids cutting and so on. E. The error pensatory function, including because the straight line electrical machinery, the main axle and so on gives off heat the hot error which causes to pensate, the quadrantal error pensates, the measurement system error pensates and so on the function. In addition, the mold highspeed cutting processing very is also high to the data transmission speed request. F. The traditional data connection, like the RS232 serial mouth transmission speed is , but many advanced processings centers have used the ether local area network (Ethernet) to carry on the data transmission, the speed may reach 200kb.5. Cooling lubricationThe high speed processing uses the belt coating the hard alloy tools, in high speed, the high temperature situation does not need the cutting pound, the cutting efficiency to be higher. This is because: The milling main axle high speed revolves, the cutting pound if achieved the cutting area, first must overe the enormous centrifugal force。優(yōu)化過程包括：粗加工后輪廓的計算、最大剩余加工余量的計算、最大允許加工余量的確定、對剩余加工余量大于最大允許加工余量的型面分區(qū)(如凹槽、拐角等過渡半徑小于粗加工刀具半徑的區(qū)域)以及半精加工時刀心軌跡的計算等。高速加工中的粗加工所應采取的工藝方案是高切削速度、高進給率和小切削用量的組合。涂層技術使涂層由單一涂層發(fā)展為多層、多種涂層材料的涂層，已成為提高高速切削能力的關鍵技術之一。 b. 速度和加速度的前饋控制(Feed forward control)；數(shù)字驅動系統(tǒng)的爬行控制(Jerk control)。采用封閉式床身設計，整體鑄造床身，對稱床身結構并配有密布的加強筋等也是提高機床穩(wěn)定性的重要措施。隨著對高速加工技術研究的不斷深入，尤其在加工機床、數(shù)控系統(tǒng)、刀具系統(tǒng)、CAD/CAM軟件等相關技術不斷發(fā)展的推動下，高速加工技術已越來越多地應用于模具型腔的加工與制造中。在模具的高淬硬鋼件(HRC45~HRC65)的加工過程中，采用高速切削可以取代電加工和磨削拋光的工序，從而避免了電極的制造和費時的電加工，大幅度減少了鉗工的打磨與拋光量。3. 機床驅動系統(tǒng)為滿足模具高速加工的需要，高速加工機床的驅動系統(tǒng)應具有下列特性：(1) 高的進給速度。5. 冷卻潤滑高速加工采用帶涂層的硬質合金刀具，在高速、高溫的情況下不用切削液，切削效率更高。刀具的前角比常規(guī)刀具的前角要小，后角略大。~30176。在模具的高速精加工中，在每次切入、切出工件時，進給方向的改變應盡量采用圓弧或曲線轉接，避免采用直線轉接，以保持切削過程的平穩(wěn)性。~30176。3. 精加工模具的高速精加工策略取決于刀具與工件的接觸點，而刀具與工件的接觸點隨著加工表面的曲面斜率和刀具有效半徑的變化而變化。螺旋等高方式的特點是，沒有等高層之間的刀路移動，可避免頻繁抬刀、進刀對零件表面質量的影響及機械設備不必要的耗損。切削鑄鐵，應選用細晶粒的K類硬質合金進行粗加工，選用復合氮化硅陶瓷或聚晶立方氮化硼（PCNB）復合刀具進行精加工。要求具有大容量緩沖寄存器，可預先閱讀和檢查多個程序段(如DMG機床可多達500個程序段，Simens系統(tǒng)可達1000~2000個程序段)，以便在被加工表面形狀(曲率)發(fā)生變化時可及時采取改變進給速度等措施以避免過切等。高速切削機床主軸的轉速范圍為10000~100000m/min，主軸功率大于15kW。高速切削使切削加工發(fā)生了本質性的飛躍，其單位功率的金屬切除率提高了30%~40%，切削力降低了30%，刀具的切削壽命提高了70%，留于工件的切削熱大幅度降低，低階切削振動幾乎消失。隨著切削速度的提高，單位時間毛坯材料的去除率增加了，切削時間減少了，加工效率提高了，從而縮短了產(chǎn)品的制造周期，提高了產(chǎn)品的市場競爭力。還要求主軸具有快速升速、在指定位置快速準停的性能(即具有極高的角加減速度)，因此高速主軸常采用液體靜壓軸承式、空氣靜壓軸承式、熱壓氮化硅（Si3N4）陶瓷軸承磁懸浮軸承式等結構形式。 e. 誤差補償功能，包括因直線電機、主軸等發(fā)熱導致的熱誤差補償、象限誤差補償、測量系統(tǒng)誤差補償?shù)裙δ?。精密?