【正文】 o aspects of CNC programming. The NC program is currently in the techniques of the most effective element of play, also occupy an important place in NC machining. As the theory of the emergence of group technology and puter design technology, puteraided design (CAD), puter aided process planning (CAPP), puter aided manufacturing (CAM), CNC machining technology in machinery manufacturing are the widely used thus greatly reducing the production cycle of electromechanical products, improve product precision and quality. This makes the whole processing system and the mechanical manufacturing process technology towards flexible, efficient, and automation development. Development Trend of Numerical Control Technology 1) Highspeed, high efficiency, highprecision processing technology and equipment of the new trends。 2) 5axis machine tool machining and rapid development。 3) intelligent, open, network development of contemporary numerical control system the main trends. Machinery manufacturing industry is the most important sector of national economy, one of the mechanical manufacturing process is generated in the production practice of human and constantly developed. CNC technology in China started in 1958, in the past 50 years, the development of numerical control process can be divided into three phases: the first from 1958 to 1979, which closed stage of development. At this stage, foreign technology as the basis for our conditions of blockade and restrictions on the development of NC technology slower. The second stage is the state39。s Plan period, that the introduction of technology, digestion and absorption, the initial establishment of system of production stage. Because at this stage of reform and opening up national attention, and research and development to improve the environment and the international environment, our research and development of NC technology has made considerable progress. The third stage is in the national Eighth FiveYear late, that the implementation of the industrialization of research into the market petition stage. At this stage, our domestic industrial CNC equipment has made practical progress. In the Ninth FiveYear end of the domestic share of CNC machine tools in the domestic market by 50%, with domestic CNC (Universal Type) to 100%. 數(shù)控技術(shù)的性質(zhì)與發(fā)展趨勢(shì)數(shù)控技術(shù)是先進(jìn)制造技術(shù)的基礎(chǔ)與核心，自從20世紀(jì)中葉數(shù)控技術(shù)創(chuàng)立以來，它給機(jī)械制造業(yè)帶來了革命性的變化?，F(xiàn)在，數(shù)控技術(shù)已成為制造業(yè)實(shí)現(xiàn)自動(dòng)化、柔性化、集成化生產(chǎn)的技術(shù)基礎(chǔ)，世界各工業(yè)發(fā)達(dá)國(guó)家通過發(fā)展數(shù)控技術(shù)、建立數(shù)控機(jī)床產(chǎn)業(yè)，促進(jìn)機(jī)械加工業(yè)跨入一個(gè)新的歷史發(fā)展階段，從而給國(guó)民經(jīng)濟(jì)的結(jié)構(gòu)帶來了巨大的變化。數(shù)控機(jī)床是機(jī)電工業(yè)的重要基礎(chǔ)裝備，是汽車、摩托車、航空航天、模具、機(jī)床、電子等支柱產(chǎn)業(yè)生產(chǎn)現(xiàn)代化的主要手段，同時(shí)，數(shù)控機(jī)床還是電子信息技術(shù)與傳統(tǒng)機(jī)床技術(shù)相融合的機(jī)電一體化產(chǎn)品，是發(fā)展機(jī)器制造業(yè)以至整個(gè)工業(yè)必不可少的復(fù)雜生產(chǎn)工具，既是生產(chǎn)要素，又是重要商品。數(shù)控機(jī)床具有高效、精密、柔性自動(dòng)化和易于實(shí)現(xiàn)工藝復(fù)合和信息集成等諸多特點(diǎn)，特別適于加工復(fù)雜形狀的零件和中小批、多品種的柔性生產(chǎn)。因而已成為現(xiàn)代化先進(jìn)制造技術(shù)最重要的基礎(chǔ)裝備和世界機(jī)床市場(chǎng)的主流生產(chǎn)。數(shù)控化率更是一個(gè)國(guó)家制造業(yè)現(xiàn)代化水平的重要標(biāo)志，數(shù)控加工技術(shù)的發(fā)展直接影響到國(guó)民經(jīng)濟(jì)各部門制造技術(shù)水平的提高。數(shù)控技術(shù)涉及數(shù)控機(jī)床加工工藝和數(shù)控編程技術(shù)兩大方面。而數(shù)控編程是目前在數(shù)控加工技術(shù)中最能發(fā)揮效益的環(huán)節(jié)之一，也在數(shù)控加工中占據(jù)重要地位。由于成組技術(shù)理論的出現(xiàn)和計(jì)算機(jī)設(shè)計(jì)技術(shù)的發(fā)展，計(jì)算機(jī)輔助設(shè)計(jì)（CAD），計(jì)算機(jī)輔助工藝設(shè)計(jì)（CAPP），計(jì)算機(jī)輔助制造（CAM），數(shù)控加工技術(shù)等在機(jī)械制造業(yè)中得到的廣泛應(yīng)用，從而大大縮短了機(jī)電產(chǎn)品的生產(chǎn)周期，提高了產(chǎn)品的高精度，高質(zhì)量。這就使整個(gè)加工系統(tǒng)及機(jī)械制造工藝技術(shù)向著柔性、高效、自動(dòng)化方面發(fā)展。1）高速、高效、高精度加工技術(shù)及裝備的新趨勢(shì)；2）5軸聯(lián)動(dòng)加工和復(fù)合加工機(jī)床快速發(fā)展；3）智能化、開放化、網(wǎng)絡(luò)化成為當(dāng)代數(shù)控系統(tǒng)發(fā)展的主要趨勢(shì)。機(jī)械制造工業(yè)是國(guó)民經(jīng)濟(jì)的最重要的部門之一，而機(jī)械制造工藝是人類在生產(chǎn)實(shí)踐中產(chǎn)生并不斷發(fā)展起來的。我國(guó)數(shù)控技術(shù)起步于1958年，在這50年時(shí)間里，數(shù)控的發(fā)展歷程大致可以分為三個(gè)階段：第一階段從1958年到1979年，即封閉式發(fā)展階段。在此階段，由于國(guó)外的技術(shù)封鎖和我國(guó)的基礎(chǔ)條件的限制，數(shù)控技術(shù)的發(fā)展較為緩慢。第二階段是在國(guó)家的“六五”期間，即引進(jìn)技術(shù)，消化吸收，初步建立產(chǎn)化體系階段。在此階段由于改革開放后國(guó)家的重視，以及研究開發(fā)環(huán)境和國(guó)際環(huán)境的改善，我國(guó)數(shù)控技術(shù)的研究和開發(fā)都取得了長(zhǎng)足的進(jìn)步。第三階段是在國(guó)家的“八五”后期，即實(shí)施產(chǎn)業(yè)化的研究，進(jìn)入市場(chǎng)競(jìng)爭(zhēng)階段。在此階段，我國(guó)國(guó)產(chǎn)數(shù)控裝備的產(chǎn)業(yè)化取得了實(shí)際性進(jìn)步。在“九五”末期，國(guó)產(chǎn)數(shù)控機(jī)床的國(guó)內(nèi)市場(chǎng)占有率達(dá)50%，配備國(guó)產(chǎn)數(shù)控系統(tǒng)（普及型）達(dá)到100%。 致謝在這幾個(gè)月的畢業(yè)設(shè)計(jì)中，我首先要感謝我的指導(dǎo)老師張蓉，他們嚴(yán)謹(jǐn)細(xì)致、一絲不茍的作風(fēng)一直是我工作、學(xué)習(xí)中的榜樣，使我不僅接受了全新的思想觀念，樹立了宏偉的學(xué)術(shù)目標(biāo)，領(lǐng)會(huì)了基本的思考方式，掌握了通用的研究方法，循善誘的教導(dǎo)和不拘一格的思路給予我無盡的啟迪。感謝曾經(jīng)幫助過和教育過我的老師們，是你們嚴(yán)以律己、寬以待人的崇高風(fēng)范，樸實(shí)無華、平易近人的人格魅力，與無微不至、感人至深的人文關(guān)懷使我的大學(xué)生活不在感到孤立無助，使我在大學(xué)三年里學(xué)到了扎實(shí)的專業(yè)知識(shí)，使我的畢業(yè)設(shè)計(jì)能夠順利的完成。我還要感謝學(xué)校的領(lǐng)導(dǎo)，由于你們的領(lǐng)導(dǎo)，學(xué)校有了長(zhǎng)足的發(fā)展，在這三年里改變了自己的思維方式，鍛煉了自己各方面的能力，確定了今后自己的發(fā)展目標(biāo)。最后祝愿天津職業(yè)大學(xué)，母校的明天更加輝煌！培養(yǎng)出一批批有志、有德、博學(xué)的優(yōu)秀17 / 17