【正文】 長(zhǎng) 25%。 國(guó)內(nèi)外發(fā)展?fàn)顩r （一）國(guó)內(nèi)數(shù)控機(jī)床現(xiàn)狀 近年來我國(guó)企業(yè)的數(shù)控機(jī)床占有率逐年上升，在大中企業(yè)已有較多的使用，在中小企業(yè)甚至個(gè)體企業(yè)中也普遍開始使用。如用普通機(jī)床，往往會(huì)遺漏加工，故需設(shè)計(jì)一臺(tái)大型數(shù)控鉆床來對(duì)其進(jìn)行加工。機(jī)械制造業(yè)是國(guó)民經(jīng)濟(jì)的基礎(chǔ)，而機(jī)床工業(yè)則是機(jī)械制造工業(yè)的基礎(chǔ)，一個(gè)國(guó)家的機(jī)床工業(yè)技術(shù)水平在很大程度標(biāo)志著這個(gè)國(guó)家的工業(yè)生產(chǎn)能力和科學(xué)技術(shù)水平。 機(jī)床的母機(jī)屬性決定了它在國(guó)民經(jīng)濟(jì)中的重要地位。它是制造機(jī)器的機(jī)器，所以稱它為“工作母機(jī)”。s machine tool industry and still a wide gap between developed countries, we must work hard, work hard in order to catch up with the world at an early date advanced level. Keywords: CNC drilling machine headstock worktable leadscrew and nut. 數(shù)控鉆床 目 錄 一 緒論 ................................................................................................................................................. 1 金屬切削機(jī)床及其重要地位 ............................................................................................ 1 問題的提出 ............................................................................................................................ 1 國(guó)內(nèi)外發(fā)展?fàn)顩r .................................................................................................................. 1 二 方案論證 ........................................................................................................................................ 2 總體布局方案論證 .............................................................................................................. 2 數(shù) 控立式鉆床 .............................................................................................................. 2 鉆削中心 ....................................................................................................................... 2 印刷線路板數(shù)控鉆床 ................................................................................................. 3 其它大型數(shù)控鉆床 ..................................................................................................... 3 數(shù)控鉆床功能組成及各部件方案論證 .......................................................................... 3 數(shù)控系統(tǒng)總體方案確定 .......................................................................................... 3 主機(jī)部分總體方案確定 .......................................................................................... 4 三 橫梁滾珠絲杠設(shè)計(jì)計(jì)算 ............................................................................................................. 5 動(dòng)載強(qiáng)度計(jì)算 ....................................................................................................................... 5 滾珠絲杠軸向負(fù)荷 F 的計(jì)算 ............................................................................................ 6 確定滾珠絲杠型號(hào) .............................................................................................................. 7 珠絲杠副的幾何參數(shù) ......................................................................................................... 7 傳動(dòng)效率計(jì)算 ....................................................................................................................... 7 剛度檢驗(yàn) ................................................................................................................................ 8 四 機(jī)械部分設(shè)計(jì)計(jì)算 ........................................................................................................................ 8 主傳動(dòng)系設(shè)計(jì)計(jì)算 ........................................................................................................... 8 動(dòng)設(shè)計(jì)計(jì)算 ................................................................................................................... 8 主軸的設(shè)計(jì)與計(jì)算 .......................................................................................................... 14 選擇軸的材料 ............................................................................................................ 14 估算軸的直徑 ............................................................................................................ 14 按彎扭軸上合成強(qiáng)度條件計(jì)算 ............................................................................ 15 按疲勞強(qiáng)度的安全系數(shù)校核計(jì)算 ........................................................................ 16 軸承的選擇與校核 .......................................................................................................... 18 主軸上鍵的選擇與校核 ................................................................................................. 20 擠壓強(qiáng)度校核 ............................................................................................................ 20 耐磨條件校核 ............................................................................................................ 20 五 工作臺(tái)設(shè)計(jì)與計(jì)算 .................................................................................................................... 21 工作臺(tái)電機(jī)的選擇 .......................................................................................................... 21 確定脈沖當(dāng)量 ............................................................................................................ 21 等效力矩計(jì)算 ............................................................................................................ 22 確定蝸輪蝸桿的傳動(dòng)比 .......................................................................................... 22 確定電機(jī)型號(hào) ............................................................................................................ 22 工作臺(tái)蝸輪蝸桿的設(shè)計(jì)計(jì)算 ........................................................................................ 23 確定蝸輪蝸桿模數(shù) m ................................................................. 錯(cuò)誤 !未定義書簽。s labor intensity and labor productivity increased significantly. The design includes a CNC drilling machine of the main mechanical structure, including: the main spindle box powertrain assembly。機(jī)床工業(yè)則是機(jī)械制造工業(yè)的基礎(chǔ)，它在國(guó)民經(jīng)濟(jì)中起著至關(guān)重要的作用，但我國(guó)機(jī)床工業(yè)與發(fā)達(dá)國(guó)家相比還有較大差距，我們必須奮發(fā)圖強(qiáng)，努力工作，以便早日趕上世界先進(jìn)水平。同時(shí)，將各項(xiàng)相關(guān)技術(shù)合理運(yùn)用，以達(dá)到最優(yōu)化設(shè)計(jì)的目的。它不僅大大減輕了操作者的勞動(dòng)強(qiáng)度，而且大大提高了勞動(dòng)生產(chǎn)率。用普通機(jī)床對(duì)其加工往往會(huì)遺漏，而小型數(shù)控加工中心則難以對(duì)其進(jìn)行加工。 數(shù)控鉆床 畢業(yè)設(shè)計(jì)（論文） 龍門式數(shù)控鉆床機(jī)械結(jié)構(gòu)設(shè)計(jì) The Mechanical Structural Design For Gantry CNC Drilling Machine