數(shù)控技術(shù)畢業(yè)設(shè)計(論文)外文翻譯--數(shù)控技術(shù)

1、<p>　　NC Teachnology</p><p>　　Research and development process to such various kinds of new technologies as numerical control lathe , machining center , FMS , CIMS ,etc. of countries all over the world,

2、 linked to with the international economic situation closely. The machine tool industry has international economy to mutually promote and develop, enter 21 alert eras of World Affairs, the function that people's know

3、ledge plays is more outstanding , and the machine tool industry is regarded as the foundation of the manufacturi</p><p>　　Pay more attention to new technology and innovation</p><p>　　Worldwide ,

4、 are launching the new craft , new material , new structure , new unit , research and development of the new component in a more cost-effective manner, developmental research of for instance new cutter material , the new

5、 electric main shaft of main shaft structure , high speed , high-speed straight line electrical machinery ,etc.. Regard innovating in improvement of the processing technology as the foundation, for process ultra and hard

6、 difficult to cut material and special composite </p><p>　　Improve the precision and research of machine tooling</p><p>　　In order to improve the machining accuracy of the machining center , are

7、 improving rigidity of the lathe , reduction vibration constantly, dispel hotly and out of shape, reduce the noise , improve the precision of localization of NC lathe , repeat precision , working dependability , stabilit

8、y , precision keeping, world a lot of country carry on lathe hot error , lathe sport and load out of shape software of error compensate technical research, take precision compensate , software compensate meas</p>

9、<p>　　Improve the research of the machine tooling productivity</p><p>　　World NC lathe, machining center and corresponding some development of main shaft , electrical machinery of straight line , measur

10、ing system , NC system of high speed, under the prerequisite of boosting productivity.</p><p>　　What a lot of countries have already begun to the numerical control system melt intelligently, openly, study ne

11、tworkedly</p><p>　　elligent research of the numerical control system</p><p>　　Mainly showing in the following aspects: It is intelligent in order to pursue the efficiency of processing and proce

12、ss quality, the self-adaptation to the processing course is controlled, the craft parameter produces research automatically; Join the convenient one in order to improve the performance of urging and use intelligently, to

13、 the feedback control , adaptive operation , discerning automatically load selects models automatically , since carries on research whole definitely ,etc. of the el</p><p>　　The numerical control system melt

14、s and studies open</p><p>　　Mainly showing in the following aspects: The development of the numerical control system is on unified operation platform, face the lathe producer and support finally, through cha

15、nging, increasing or cutting out the structure target(numerical control target ), form the seriation, and can use users specially conveniently and the technical know-how is integrated in the control system, realize the o

16、pen numerical control system of different variety , different grade fast, form leading brand products</p><p>　　Meeting the manufacture system of the production line , demand for the information integration o

17、f the manufacturing company networkedly greatly of numerical control equipment, it is a basic unit of realizing the new manufacture mode too.</p><p>　　Process according to main shaft space position when it c

18、lassifies to be as follows, horizontal and vertical machining center.</p><p>　　Horizontal machining center, refer to the machining center that the axis level of the main shaft is set up . Horizontal machinin

19、g center for 3-5 sport coordinate axis, a common one three rectilinear motion coordinate axis and one turn the coordinate axis of sports round (turn the workingbench round), it can one is it is it finish other 4 Taxi pro

20、cessing besides installing surfaces and top surfaces to insert to install in work piece, most suitable for processing the case body work piece . Compare</p><p>　　Vertical machining center, the axis of the ma

21、in shaft of the vertical machining center, in order to set up vertically, its structure is mostly the regular post type, the workingbench is suitable for processing parts for the slippery one of cross, have 3 rectilinear

22、 motion coordinate axis generally , can find a room for one horizontal numerical control revolving stage (the 4th axle ) of axle process the spiral part at workingbench. The vertical machining center is of simple structu

23、re, the floor s</p><p>　　Large-scale gantry machining center, the main shafts are mostly set up vertically, is especially used in the large-scale or with complicated form work piece , is it spend the many co

24、ordinate gantry machining center to need like aviation , aerospace industry , some processing of part of large-scale steam turbine.</p><p>　　Five machining centers, this kind of machining center has function

25、 of the vertical and horizontal machining center, one is it after inserting , can finish all five Taxi processing besides installing the surface to install in work piece, the processing way can make form of work piece er

26、ror lowest , save 2 times install and insert working, thus improve production efficiency , reduce the process cost.</p><p>　　Is it mill machining center to bore, is it mill for vertical door frame machining

27、center , horizontal door frame mill the machining center and Longmen door frame mill the machining center to divide into. Processing technology its rely mainly on the fact that the door frame is milled, used in case body

28、, shell and various kinds of complicated part special curve and large processes , curved surface of outline process, suitable for many varieties to produce in batches small.</p><p>　　Complex machining center

29、, point five times and compound and process mainly, the main shaft head can be turned round automatically, stand, lie and process, after the main shaft is turned round automatically, realize knowing that varies in the ho

30、rizontal and vertical direction.</p><p>　　Single workingbench , a pair of workingbench machining center;</p><p>　　Single axle , dual axle , three axle can change machining center , main shaft of

31、 case;</p><p>　　Transfer vertically to the tower machining center and transfer ;</p><p>　　One hundred sheets of storehouses adds the main shaft and changes one one hundred sheets of machining ce

32、nters;</p><p>　　One hundred sheets of storehouses connects and writes hands to add the main shaft and change one hundred sheets of machining centers; </p><p>　　One hundred sheets of storehouses

33、adds the manipulator and adds one pair of main shafts to transfer to the tower machining center.</p><p>　　At present, the advanced manufacturing technology in the world is rising constantly, such application

34、 of technology as ultrafast cutting , ultraprecision processing ,etc., the rapid development of the flexible manufacturing system and integrated system of the computer one is constant and ripe, have put forward higher de

35、mand to the process technology of numerical control. Nowadays the numerical control lathe is being developed in several following directions.</p><p>　　The speed and precision at a high speed , high accuracy

36、are two important indexes of the numerical control lathe , it concerns directly that processes efficiency and product quality. At present, numerical control system adopt-figure number, frequency high processor, in order

37、to raise basic operation speed of system. Meanwhile , adopt the super large-scale integrated circuit and many microprocessors structure, in order to improve systematic data processing ability , namely improve and insert

38、the </p><p>　　For meet ultrafast demand that process, numerical control lathe adopt main shaft motor and lathe structure form that main shaft unite two into one, realize frequency conversion motor and lathe

39、main shaft integrate , bearing , main shaft of electrical machinery adopt magnetism float the bearing , liquid sound pigeonhole such forms as the bearing or the ceramic rolling bearing ,etc.. At present, ceramic cutter a

40、nd diamond coating cutter have already begun to get application.</p><p>　　Multi-functional to is it change all kinds of machining centers of organization (a of capacity of storehouse can up to 100 of the abo

41、ve ) automatically to furnished with, can realize milling paring , boring and pares , bores such many kinds of processes as paring , turning , reaming , reaming , attacking whorl ,etc. to process at the same time on the

42、same lathe , modern numerical control lathe adopt many main shaft , polyhedron cut also , carry on different cutting of way process to one differen</p><p>　　Intelligent modern numerical control lathe introdu

43、ce the adaptive control technology, according to cutting the change of the condition, automatic working parameter, make the processing course can keep the best working state , thus get the higher machining accuracy and r

44、oughness of smaller surface , can improve the service life of the cutter and production efficiency of the equipment at the same time . Diagnose by oneself , repair the function by oneself, among the whole working state,

45、the system</p><p>　　Numerical control programming automation with the development of application technology of the computer, CAD/CAM figure interactive automatic programming has already get more application

46、at present, it is a new trend of the technical development of numerical control. It utilize part that CAD draw process pattern , is it calculate the trailing punishing to go on by cutter orbit data of computer and then,

47、thus produce NC part and process the procedure automatically, in order to realize the integra</p><p>　　The dependability of the dependability maximization numerical control lathe has been the major indicator

48、 that users cared about most all the time . The numerical control system will adopt the circuit chip of higher integrated level , will utilize the extensive or super large-scale special-purpose and composite integrated c

49、ircuit, in order to reduce the quantity of the components and parts , to improve dependability . Through the function software of the hardware, in order to meet various kinds o</p><p>　　Control system miniat

50、urization systematic miniaturization of numerical control benefit and combine the machine , electric device for an organic whole. Adopt the super large-scale integrated component , multi-layer printed circuit board mainl

51、y at present, adopt the three-dimensional installation method , make the electronic devices and components must use the high density to install, narrow systematic occupying the space on a larger scale. And utilize the ne

52、w-type slim display of colored liquid c</p><p><b>　　數(shù)控技術(shù)</b></p><p>　　世界各國對數(shù)控機床、加工中心以至FMS、CIMS等各種新技術(shù)的研究與發(fā)展進程，是與世界經(jīng)濟形勢緊密相連的。機床工業(yè)有世界經(jīng)濟相互促進和發(fā)展，進入21世界知識機警時代，人們的知識所起的作用更加突出，而機床工業(yè)作為機器制造業(yè)的基

53、礎(chǔ)，其重點地位與戰(zhàn)略意義也更加明顯。在1991—1994年間，世界經(jīng)濟衰退，昂貴的FMS，CIMS降溫，1995—2000年間，世界經(jīng)濟在低速增長，根據(jù)當前世界市場各方面用戶為提高生產(chǎn)率對NC機床的要求以及世界四大國際機床展（歐洲的EMO、美國的IMTS、日本的JIMTOF、中國的CIMT）上展品的分析，當前世界NC機床的技術(shù)研究主要有以下幾點：</p><p>　　在世界范圍內(nèi)，對新工藝、新材料、新結(jié)構(gòu)、新單元

54、、新元件的研究開發(fā)工作正在大力開展，如新的刀具材料、新的主軸結(jié)構(gòu)、高速電主軸、高速直線電機等的開發(fā)研究。以加工工藝的改進創(chuàng)新為基礎(chǔ)，為加工超硬、難切削材料及特殊復(fù)合材料及復(fù)雜零件、不規(guī)則曲面等在不斷研究開發(fā)新機種。</p><p>　　為了提高加工中心的加工精度，不斷提高機床的剛度、減少振動，消除熱變形，降低噪聲，提高NC機床的定位精度、重復(fù)精度、工作可靠性、穩(wěn)定性、精度保持性，世界很多國家都在進行機床熱誤差、機

55、床運動及負載變形誤差的軟件補償技術(shù)研究，并采取精度補償、軟件補償?shù)却胧┘右愿纳?，有的已?jīng)可以使此類誤差消除60%。并在不斷開發(fā)精細加工，納米加工。</p><p>　　世界NC機床、加工中心及相應(yīng)的高速點主軸、直線電機、測量系統(tǒng)、NC系統(tǒng)的開發(fā)，均以提高生產(chǎn)率為前提。</p><p>　　主要表現(xiàn)在：為追求加工效率和加工質(zhì)量的智能化，對加工過程的自適應(yīng)控制，工藝參數(shù)自動生成進行研究；為提高

56、驅(qū)動性能及使用連接方便的智能化，對反饋控制、電機參數(shù)的自適應(yīng)運算、自動識別負載自動選定模型、自整定等進行研究；還有智能化的自動編程、智能化的人機界面、智能診斷、智能監(jiān)控等方面的研究。</p><p>　　主要表現(xiàn)在：數(shù)控系統(tǒng)的開發(fā)在統(tǒng)一的運行平臺上，面向機床廠家和最終擁護，通過改變、增加或剪裁結(jié)構(gòu)對象（數(shù)控對象），形成系列化，并可方便地將用戶的特殊應(yīng)用和技術(shù)訣竅集成到控制系統(tǒng)中，快速實現(xiàn)不同品種、不同檔次的開放式

57、數(shù)控系統(tǒng)，形成具有鮮明個性的名牌產(chǎn)品。目前開放式數(shù)控系統(tǒng)的體系結(jié)構(gòu)規(guī)范、通行規(guī)范、配置規(guī)范、運行平臺、數(shù)控系統(tǒng)功能庫以及數(shù)控系統(tǒng)功能軟件開發(fā)工具等是當前研究的核心。</p><p>　　數(shù)控裝備的網(wǎng)絡(luò)化將極大地滿足生產(chǎn)線制造系統(tǒng)、制造企業(yè)對信息集成的需求，也是實現(xiàn)新的制造模式的基礎(chǔ)單元。</p><p>　　按主軸加工時的空間位置分類有：臥式和立式加工中心。</p><

58、p>　　臥式加工中心，是指主軸軸線水平設(shè)置的加工中心。臥式加工中心一般具有3—5個運動坐標軸，常見的是三個直線運動坐標軸和一個回轉(zhuǎn)運動坐標軸（回轉(zhuǎn)工作臺），它能在工件一次裝夾完成除安裝面和頂面以外的其余4個面的加工，最適合加工箱體類工件。它與力式加工中心相比，結(jié)構(gòu)復(fù)雜，占地面積大，質(zhì)量大，價格高。</p><p>　　立式加工中心，立式加工中心主軸的軸線為垂直設(shè)置，其結(jié)構(gòu)多為固定立柱式，工作臺為十字滑臺，適

59、合加工盤類零件，一般具有3個直線運動坐標軸，并可在工作臺上安置一個水平軸的數(shù)控轉(zhuǎn)臺（第4軸）來加工螺旋類零件。立式加工中心結(jié)構(gòu)簡單，占地面積小，價格低，配備各種附件后，可進行大部分工件的加工。</p><p>　　大型龍門式加工中心，主軸多為垂直設(shè)置，尤其使用于大型或形狀復(fù)雜的工件，像航空、航天工業(yè)及大型汽輪機上的某些零件的加工都需要用這類多坐標龍門式加工中心。</p><p>　　五面加

60、工中心，這種加工中心具有立式和臥式加工中心的功能，在工件一次裝夾后，能完成除安裝面外的所有五個面的加工，這種加工方式可以使工件的形狀誤差降到最低，省去二次裝夾工作，從而提高生產(chǎn)效率，降低加工成本。</p><p>　　鏜銑加工中心，分為立式樘銑加工中心、臥式樘銑加工中心和龍門樘銑加工中心。其加工工藝以樘銑為主，用于箱體，殼體以及各種復(fù)雜零件特殊曲線和曲面輪廓的多工序加工，適合多品種小批量生產(chǎn)。</p>

61、<p>　　復(fù)合加工中心，主要指五面復(fù)合加工，主軸頭可自動回轉(zhuǎn)，進行立，臥加工，在主軸自動回轉(zhuǎn)后，在水平和垂直方向?qū)崿F(xiàn)知道變換。</p><p>　　單工作臺、雙工作臺加工中心；</p><p>　　單軸、雙軸、三軸及可換主軸箱的加工中心；</p><p>　　立式轉(zhuǎn)塔加工中心和臥式轉(zhuǎn)塔加工中心；</p><p>　　刀庫加主軸

62、換刀加工中心；</p><p>　　刀庫接寫手加主軸換刀加工中心；</p><p>　　刀庫加機械手加雙主軸轉(zhuǎn)塔加工中心。</p><p>　　目前，世界先進制造技術(shù)不斷興起，超高速切削、超精密加工等技術(shù)的應(yīng)用，柔性制造系統(tǒng)的迅速發(fā)展和計算機集成系統(tǒng)的不斷成熟，對數(shù)控加工技術(shù)提出了更高的要求。當今數(shù)控機床正在朝著以下幾個方向發(fā)展。</p><p&

63、gt;　　高速度、高精度化速度和精度是數(shù)控機床的兩個重要指標，它直接關(guān)系到加工效率和產(chǎn)品質(zhì)量。目前，數(shù)控系統(tǒng)采用位數(shù)、頻率更高的處理器，以提高系統(tǒng)的基本運算速度。同時，采用超大規(guī)模的集成電路和多微處理器結(jié)構(gòu)，以提高系統(tǒng)的數(shù)據(jù)處理能力，即提高插補運算的速度和精度。并采用直線電動機直接驅(qū)動機床工作臺的直線伺服進給方式，其高速度和動態(tài)響應(yīng)特性相當優(yōu)越。采用前饋控制技術(shù)，使追蹤滯后誤差大大減小，從而改善拐角切削的加工精度。</p>

64、<p>　　為適應(yīng)超高速加工的要求，數(shù)控機床采用主軸電動機與機床主軸合二為一的結(jié)構(gòu)形式，實現(xiàn)了變頻電動機與機床主軸一體化，主軸電機的軸承采用磁浮軸承、液體動靜壓軸承或陶瓷滾動軸承等形式。目前，陶瓷刀具和金剛石涂層刀具已開始得到應(yīng)用。</p><p>　　多功能化配有自動換刀機構(gòu)(刀庫容量可達100把以上)的各類加工中心，能在同一臺機床上同時實現(xiàn)銑削、鏜削、鉆削、車削、鉸孔、擴孔、攻螺紋等多種工序加工，

65、現(xiàn)代數(shù)控機床還采用了多主軸、多面體切削，即同時對一個零件的不同部位進行不同方式的切削加工。數(shù)控系統(tǒng)由于采用了多CPU結(jié)構(gòu)和分級中斷控制方式，即可在一臺機床上同時進行零件加工和程序編制，實現(xiàn)所謂的“前臺加工，后臺編輯”。為了適應(yīng)柔性制造系統(tǒng)和計算機集成系統(tǒng)的要求，數(shù)控系統(tǒng)具有遠距離串行接口，甚至可以聯(lián)網(wǎng)，實現(xiàn)數(shù)控機床之間的數(shù)據(jù)通信，也可以直接對多臺數(shù)控機床進行控制。</p><p>　　智能化現(xiàn)代數(shù)控機床將引進自適

66、應(yīng)控制技術(shù)，根據(jù)切削條件的變化，自動調(diào)節(jié)工作參數(shù)，使加工過程中能保持最佳工作狀態(tài)，從而得到較高的加工精度和較小的表面粗糙度，同時也能提高刀具的使用壽命和設(shè)備的生產(chǎn)效率。具有自診斷、自修復(fù)功能，在整個工作狀態(tài)中，系統(tǒng)隨時對CNC系統(tǒng)本身以及與其相連的各種設(shè)備進行自診斷、檢查。一旦出現(xiàn)故障時，立即采用停機等措施，并進行故障報警，提示發(fā)生故障的部位、原因等。還可以自動使故障模塊脫機，而接通備用模塊，以確保無人化工作環(huán)境的要求。為實現(xiàn)更高的故障

67、診斷要求，其發(fā)展趨勢是采用人工智能專家診斷系統(tǒng)。</p><p>　　數(shù)控編程自動化隨著計算機應(yīng)用技術(shù)的發(fā)展，目前CAD／CAM圖形交互式自動編程已得到較多的應(yīng)用，是數(shù)控技術(shù)發(fā)展的新趨勢。它是利用CAD繪制的零件加工圖樣，再經(jīng)計算機內(nèi)的刀具軌跡數(shù)據(jù)進行計算和后置處理，從而自動生成NC零件加工程序，以實現(xiàn)CAD與CAM的集成。隨著CIMS技術(shù)的發(fā)展，當前又出現(xiàn)了CAD／CAPP／CAM集成的全自動編程方式，它與CA

68、D／CAM系統(tǒng)編程的最大區(qū)別是其編程所需的加工工藝參數(shù)不必由人工參與，直接從系統(tǒng)內(nèi)的CAPP數(shù)據(jù)庫獲得。</p><p>　　可靠性最大化數(shù)控機床的可靠性一直是用戶最關(guān)心的主要指標。數(shù)控系統(tǒng)將采用更高集成度的電路芯片，利用大規(guī)?；虺笠?guī)模的專用及混合式集成電路，以減少元器件的數(shù)量，來提高可靠性。通過硬件功能軟件化，以適應(yīng)各種控制功能的要求，同時采用硬件結(jié)構(gòu)機床本體的模塊化、標準化和通用化及系列化，使得既提高硬件生

69、產(chǎn)批量，又便于組織生產(chǎn)和質(zhì)量把關(guān)。還通過自動運行啟動診斷、在線診斷、離線診斷等多種診斷程序，實現(xiàn)對系統(tǒng)內(nèi)硬件、軟件和各種外部設(shè)備進行故障診斷和報警。利用報警提示，及時排除故障；利用容錯技術(shù)，對重要部件采用“冗余”設(shè)計，以實現(xiàn)故障自恢復(fù)；利用各種測試、監(jiān)控技術(shù)，當生產(chǎn)超程、刀損、干擾、斷電等各種意外時，自動進行相應(yīng)的保護。</p><p>　　控制系統(tǒng)小型化數(shù)控系統(tǒng)小型化便于將機、電裝置結(jié)合為一體。目前主要采用超大