【正文】 iciency of the machine parts. Therefore, for a machine with a new generation of machined parts is also increasing. In this trend, driven by CNC machine tools transform the structure optimization design bees very significant. A large number of CNC machine tools just mushroomed into the machinery manufacturing industry. Such as CNC engraving machine plays an important role in the field of mold, PCB circuit board, and advertising signs. In this paper, surveys and studies have been done of the fixed beam CNC engraving machine CNC machine tools development at home and abroad as well as its outlook for manufacturing in the future, and the structure of the CNC machine to do the research and design optimization, the overall layout design machine main drive system design (the electric spindle or motor directly connected to the transmission structure), machine tool feed motion systems (rail and ball screw) structural design, the ball screw calculation of selection and check the bearing and motor the calculation and selection, and finally the use of CAD drawing software to draw the general assembly drawing of the machine, some parts diagram and structure diagram. Key words: CNC engraving and milling machine； spindle； rail； ball screw 畢業(yè)設(shè)計(jì)說明書論文 1961660126 課件之家的資料精心整理好資料 目 錄 摘 要 ............................................................................................................................................. II ABSTRACT ...................................................................................................................................III 目 錄 .............................................................................................................................................V 1 緒論 ............................................................................................................................................. 1 數(shù)控雕刻技術(shù)的產(chǎn)生 .......................................................................................................... 1 本課題研究的內(nèi)容及意義 .................................................................................................. 1 國內(nèi)外研究狀況及其發(fā)展趨勢 .......................................................................................... 1 雕刻機(jī)機(jī)械系統(tǒng)設(shè)計(jì)的主要技術(shù)指標(biāo) .............................................................................. 4 2 雕刻機(jī)總體布局方案設(shè)計(jì) ......................................................................................................... 5 數(shù)控雕刻機(jī)布局要求及影響因素 ...................................................................................... 5 數(shù)控雕刻機(jī)總體結(jié)構(gòu)布局 .................................................................................................. 6 數(shù)控雕刻機(jī)結(jié)構(gòu)的改良對比 .............................................................................................. 7 工作臺的結(jié)構(gòu)設(shè)計(jì) .............................................................................................................. 9 本章小結(jié) ............................................................................................................................ 10 3 主傳動系統(tǒng)的 方案設(shè)計(jì) ........................................................................................................... 11 主運(yùn)動傳動系統(tǒng)設(shè)計(jì) ........................................................................................................ 11 電主軸 ................................................................................................................................ 12 電主軸的介紹 ........................................................................................................... 12 電主軸的結(jié)構(gòu)及其優(yōu)點(diǎn) ........................................................................................... 12 電主軸的安裝 ........................................................................................................... 14 本章小結(jié) ............................................................................................................................ 14 4 機(jī)床進(jìn)給系統(tǒng)方案設(shè)計(jì) ........................................................................................................... 15 進(jìn)給傳動系統(tǒng)選擇 ............................................................................................................ 15 進(jìn)給傳動系統(tǒng)的要求 ............................................................................................... 15 進(jìn)給傳動系統(tǒng)的基本形式 ....................................................................................... 15 以上幾種傳動方案的簡介和比較 ........................................................................... 15 滾珠絲杠系統(tǒng) .................................................................................................................... 17 滾珠絲杠副的選擇 ................................................................................................... 17 滾珠絲杠支承結(jié)構(gòu) ................................................................................................... 17 支承軸承的選擇 ....................................................................................................... 19 滾珠絲杠副的制動裝置 ........................................................................................... 19 步進(jìn)電機(jī)與進(jìn)給絲杠的聯(lián)結(jié)結(jié)構(gòu) ........................................................................... 19 滾動導(dǎo)軌的安裝定位 ........................................................................................................ 20 本章小結(jié) ............................................................................................................................ 20 5 主傳動及 X 向進(jìn)給系統(tǒng)部分零件計(jì)算和校核 ...................................................................... 21 主傳動零部件計(jì)算及校核 ................................................................................................ 21 主軸參數(shù)設(shè)計(jì) ........................................................................................