【正文】 s misery, the cow told him to turn its hide into a pair of shoes after it died. The magic shoes whisked Niulang, who carried his two children in baskets strung from a shoulder pole, off on a chase after the empress. The pursuit enraged the empress, who took her hairpin and slashed it across the sky creating the Milky Way which separated husband from wife. But all was not lost as magpies, moved by their love and devotion, formed a bridge across the Milky Way to reunite the family. Even the Jade Emperor was touched, and allowed Niulang and Zhinu to meet once a year on the seventh night of the seventh month. This is how Qixi came to be. The festival can be traced back to the Han Dynasty (206 BCAD 220). Traditionally, people would look up at the sky and find a bright star in the constellation Aquila as well as the star Vega, which are identified as Niulang and Zhinu. The two stars shine on opposite sides of the Milky Way. Customs In bygone days, Qixi was not only a special day for lovers, but also for girls. It is also known as the Begging for Skills Festival or Daughters39。 ========畢業(yè)論文 第 14 頁 共 14 頁 謝 辭 本論文的完成，得益于陳尚坤老師傳授的知識(shí)，使本人有了完成論文所要求的知識(shí)積累。 返回起刀點(diǎn) 63 M02。 建立左刀補(bǔ) 55 G01 。 至起始點(diǎn) 47 。 粗車Φ 30 內(nèi)孔 39 G00 。 刀具至循環(huán)起點(diǎn) 31 G90 。 倒角 23 G00 T0100。 端面及Φ 80 外圓粗加工開始 15 G50 M08。 鉆Φ 30 底孔至Φ 28 開始程序段 7 G50 M08。 常用指令表 代碼 功能 代碼 功能 G00 快速定位 M00 程序停止 G01 直線插補(bǔ) M01 選擇停止 G02 順時(shí)針插補(bǔ) M02 程序結(jié)束 G03 逆時(shí)針插補(bǔ) M03 主軸正轉(zhuǎn) G04 程序暫停 M04 主軸反轉(zhuǎn) G17 M05 主軸停止 G18 M08 切削液開 ========畢業(yè)論文 第 10 頁 共 14 頁 G19 M09 切削液關(guān) G27 返回參考點(diǎn)檢查 M30 程序結(jié)束 G28 自動(dòng)返回參考點(diǎn) M98 子程序調(diào)用 G29 從參考點(diǎn)返回 M99 子程序結(jié)束并返回主程序 G32 螺紋切削 G99_F_ 每轉(zhuǎn)進(jìn)給 G33 G98_F_ 每分鐘進(jìn)給 G34 G50 S_ 主軸最高轉(zhuǎn)速 G35 G96 S_ 恒線速度 G40 取消刀尖圓弧半徑補(bǔ)償 G97 S_ 恒轉(zhuǎn)速 G41 刀具左補(bǔ)償 T____ 換刀 G42 刀具 右補(bǔ)償 G50 工件坐標(biāo)系 G70 精加工循環(huán) G71 軸向粗車復(fù)合循環(huán) G72 徑向粗車復(fù)合指令 G73 仿形粗車循環(huán) G76 螺紋車削多次循環(huán) G90 軸向切削循環(huán)指令 G92 用于切削螺紋的循環(huán)指令 G94 徑向切削循環(huán)指令 4．?dāng)?shù)控車床實(shí)例應(yīng)用 下面以下圖所示零件為例，介紹在數(shù)控車床上加工的程序方法。 下面以 N10 程序段為例介紹程序段的格式 N10 G01 X Z0 。 控加工工藝分析 數(shù)控加工工藝性分析涉及內(nèi)容很多，在此僅從數(shù)控加工的必要性、可能性與方便性加以分析。 新一代數(shù)控系統(tǒng)技術(shù)水平大大提高，大大促進(jìn)了數(shù)控機(jī)床性能的提高。 （ 1）形狀復(fù)雜，加工精度高 （ 2）公差帶小，互換性高 （ 3）價(jià)值高的零件 （ 4）小批量生產(chǎn)零件 （ 5）鉆，鏜，鉸，攻螺紋及銑削加工聯(lián)合進(jìn)行的零件 數(shù)控技術(shù)的發(fā)展趨勢 1952 年美國研制出世界上第一臺(tái)數(shù)控銑床，開創(chuàng)了世界數(shù)控 機(jī)床發(fā)展的先河。 1959 年研制成晶體管和印刷電路的第二代數(shù)控技術(shù)，體積小，成本有所下降。此外，激烈的市場競爭要求產(chǎn)品研制生產(chǎn)周期越來越短，傳統(tǒng)的加工設(shè)備和制造方法已難于適應(yīng)這種多樣化、柔性化與復(fù)雜形狀零件的高效，高質(zhì)量加工要求。因此，近幾十年來，能有效解決復(fù)雜、精密、小批多變零件加工問題的數(shù)控加工技術(shù)得到了迅速發(fā)展和廣泛應(yīng)用，使制造技術(shù)發(fā)生了根本性的變化。 關(guān)鍵詞： 數(shù)控技術(shù)核心；數(shù)控裝備；高精尖 鄭州華信學(xué)院畢業(yè)論文 Abstract Digital Control (number control) referred to as NC (NC), developed a kind of modern automation technology is the use of digital information to achieve a method of control of machinery and equipment. With the continuous development of science and technology, the munity has increasingly stronger demands for product diversification, product upgrading Panda faster, multispecies, a marked increase in the proportion of small and medium volume production, plexshaped parts, more and more the more precision to the higher. In addition, the intense petition in the market demands shorter and shorter product development cycle, the traditional processing equipment and manufacturing methods are difficult to adapt to this diversity, flexible highperformance parts with plex shapes, highquality processing requirements. Thus, in recent decades, can effectively solve the plex, sophisticated, small batch processing problems and everchanging parts CNC machining technology has been rapid development and wide application of Manufacturing technology to make fundamental changes have taken place. Key words: numerical control technology 鄭州華信學(xué)院畢業(yè)論文 目 錄 引 言 ........................................................................ 5 ........................................................................ 6 數(shù)控加工技術(shù)概況 ....................................................... 6 數(shù)控技術(shù)的特點(diǎn) ......................................................... 6 數(shù)控機(jī)床的加工原理 ..................................................... 6 數(shù)控加工技術(shù)的主要應(yīng)用對象 ............................................. 7 數(shù)控技術(shù)的發(fā)展趨勢 ..................................................... 7 2．?dāng)?shù)控加工工藝 ............................................................... 7 數(shù)控加工工藝概述 ....................................................... 7 數(shù)控加工工藝的特點(diǎn) ............................................... 8 數(shù)控加工工藝的主要能容 ........................................... 8 數(shù)控機(jī)床的合理選用 ............................................... 8 控加工工藝分析與工藝設(shè)計(jì) ............................................... 8 控加工工藝分析 ................................................... 8 數(shù)控加工工藝設(shè)計(jì) ................................................. 8 3．?dāng)?shù)控編程基礎(chǔ) ............................................................... 8 程序格式 ............................................................... 9 程序段的格式和組成 ...............................................