【正文】 rol, such as the integration of advanced, a highprecision, highefficiency, flexible automation, and other characteristics, the manufacturing industry Flexible automation, integrated, intelligent play the pivotal role. At present, NC technology is undergoing a fundamental change, from a special closedloop control mode to generalpurpose realtime dynamic open all closedloop control mode. In the integrated on the basis of the CNC systems ultrathin, ultralight。s CNC system for traditional closed architecture, but only as a nonintelligent CNC machine controller. Process variables based on experience in the form of prefixed parameters, processing procedures before the actual processing by hand or through CAD / CAM and automatic programming system prepared. CAD / CAM and CNC have no feedback control link, the entire manufacturing process CNC is a closed ringopening implementing agencies. In a plex and changing environment under the conditions of processing tool in the process of position, workpiece material, spindle speed, feed rate, tool path, cutting depth, step, allowance and other processing parameters, not at the scene circumstances under external interference and realtime dynamic random factors, not by random amendment feedback control link CAD / CAM settings volume, in turn, affect the work of CNC machining efficiency and product quality. Clearly, the traditional fixed CNC system that controlled mode and closed architecture, limiting the CNC to the development of more intelligent control variables, can no longer meet the increasingly plex manufacturing process, therefore, the CNC technology in the potential for change inevitable. 2 NC technology development trends Performance development direction (1) highspeed highprecision efficient speed, accuracy and efficiency of machinery manufacturing technology is the key performance indicators. As a result of the highspeed CPU chips, RISC chip, as well as multiCPU control system with highresolution detector of the absolute exchange digital servo system, taken at the same time improve the machine dynamic and static characteristics of effective measures, the highspeed highprecision machine has been efficient greatly enhanced. (2) Flexible includes two aspects: CNC system itself flexibility, NC system is modular in design, functional coverage, can be cut and strong, and easy to meet the needs of different users。(4)通用型開(kāi)放式閉環(huán)控制模式　采用通用計(jì)算機(jī)組成總線式、模塊化、開(kāi)放式、嵌入式體系結(jié)構(gòu)，便于裁剪、擴(kuò)展和升級(jí)，可組成不同檔次、不同類(lèi)型、不同集成程度的數(shù)控系統(tǒng)。應(yīng)用FPD平板顯示技術(shù)，可提高顯示器性能。在數(shù)控技術(shù)領(lǐng)域，可視化技術(shù)可用于CAD/CAM，如自動(dòng)編程設(shè)計(jì)、參數(shù)自動(dòng)設(shè)定、刀具補(bǔ)償和刀具管理數(shù)據(jù)的動(dòng)態(tài)處理和顯示以及加工過(guò)程的可視化仿真演示等。在數(shù)控技術(shù)領(lǐng)域，實(shí)時(shí)智能控制的研究和應(yīng)用正沿著幾個(gè)主要分支發(fā)展：自適應(yīng)控制、模糊控制、神經(jīng)網(wǎng)絡(luò)控制、專(zhuān)家控制、學(xué)習(xí)控制、前饋控制等。由于采用了高速CPU芯片、RISC芯片、多CPU控制系統(tǒng)以及帶高分辨率絕對(duì)式檢測(cè)元件的交流數(shù)字伺服系統(tǒng)，同時(shí)采取了改善機(jī)床動(dòng)態(tài)、靜態(tài)特性等有效措施，機(jī)床的高速高精高效化已大大提高。目前，數(shù)控技術(shù)正在發(fā)生根本性變革，由專(zhuān)用型封閉式開(kāi)環(huán)控制模式向通用型開(kāi)放式實(shí)時(shí)動(dòng)態(tài)全閉環(huán)控制模式發(fā)展。加工過(guò)程變量根據(jù)經(jīng)驗(yàn)以固定參數(shù)形式事先設(shè)定，加工程序在實(shí)際加工前用手工方式或通過(guò)CAD/CAM及自動(dòng)編程系統(tǒng)進(jìn)行編制。數(shù)控機(jī)床的工藝復(fù)合化是指工件在一臺(tái)機(jī)床上一次裝夾后，通過(guò)自動(dòng)換刀、旋轉(zhuǎn)主軸頭或轉(zhuǎn)臺(tái)等各種措施，完成多工序、多表面的復(fù)合加工。由于不同用戶(hù)對(duì)界面的要求不同，因而開(kāi)發(fā)用戶(hù)界面的工作量極大，用戶(hù)界面成為計(jì)算機(jī)軟件研制中最困難的部分之一。(4)內(nèi)裝高性能PLC　數(shù)控系統(tǒng)內(nèi)裝高性能PLC控制模塊，可直接用梯形圖或高級(jí)語(yǔ)言編程，具有直觀的在線調(diào)試和在線幫助功能。通過(guò)提高集成電路密度、減少互連長(zhǎng)度和數(shù)量來(lái)降低產(chǎn)品價(jià)格，改進(jìn)性能，減小組件尺寸，提高系統(tǒng)的可靠性。加工過(guò)程中采用開(kāi)放式通用型實(shí)時(shí)動(dòng)態(tài)全閉環(huán)控制模式，易于將計(jì)算機(jī)實(shí)時(shí)智能技術(shù)、網(wǎng)絡(luò)技術(shù)、多媒體技術(shù)、CAD/CAM、伺服控制、自適應(yīng)控制、動(dòng)態(tài)數(shù)據(jù)管理及動(dòng)態(tài)刀具補(bǔ)償、動(dòng)態(tài)仿真等高新技術(shù)融于一體，構(gòu)成嚴(yán)密的制造過(guò)程閉環(huán)控制體系，從而實(shí)現(xiàn)集成化、智能化、網(wǎng)絡(luò)