【正文】 為了能具體確切的說(shuō)明過(guò)程，使工件能按照零件圖的技術(shù)要求加工出來(lái)，就得制定復(fù)雜的機(jī)械加工工藝規(guī)程來(lái)作為生產(chǎn)的指導(dǎo)性技術(shù)文件，學(xué)習(xí)研究制定機(jī)械加工工藝規(guī)程的意義與作用就是本課題研究目的。 關(guān)鍵詞 工序，工藝，工步，加工余量，定位方案，夾緊力 圖（ 1）三視圖 本科畢業(yè)設(shè)計(jì)（論文）說(shuō)明書(shū) II ABSTRACT Enable producing the target in process of production (raw materials, the blank , state of quality and quantity on part bee always ) take place direct course of change ask craft course, if the blank is made, machining, heat treatment , assemble etc. and call it the craft course. In the course of making the craft , is it confirm every erector location and worker step that process need this of process to want, the lootive of processing , this process , and the entering the giving amount of the lathe, cut depth , the rotational speed of the main shaft and speed of cutting, the jig of this process, the cutter and measuring tool, a one hundred sheets of number of times still leaves and a one hundred sheets of length leaves, calculate basic time of this process , auxiliary time and service time of place of working finally. Keywords： The process, worker one, worker39。 本科畢業(yè)設(shè)計(jì)（論文）說(shuō)明書(shū) I 摘 要 在生產(chǎn)過(guò)程中，使生產(chǎn)對(duì)象（原材料，毛坯，零件或總成等）的質(zhì)和量的狀態(tài)發(fā)生直接變化的過(guò)程叫工藝過(guò)程，如毛坯制造，機(jī)械加工，熱處理，裝配等都稱(chēng)之為工藝過(guò)程。在制定工藝過(guò)程中，要確定各工序的安裝工位和該工序需要的工步，加工該工序的機(jī)車(chē)及機(jī)床的進(jìn)給量，切削深度，主軸轉(zhuǎn)速和切削速度，該工序的夾具，刀具及量具，還有走刀次數(shù)和走刀長(zhǎng)度，最后計(jì)算該工序的基本時(shí)間，輔助時(shí)間和工作地服務(wù)時(shí)間。s step , the surplus of processing, orient the scheme , clamp strength 本科畢業(yè)設(shè)計(jì)（論文）說(shuō)明書(shū) III 目 錄 摘要 ............................................................................................................................. I ABSTRACT.......................................................................................................... II 目錄 ............................................................................................................................ III 第一章緒論 ............................................................................................................. 1 第二章 CA6140 機(jī)床后托架加工工藝 ................................................................4 CA6140機(jī)床后托架的工藝分析 .............................................................................. 4 CA6140機(jī)床后托架的工藝要求及工藝分析 ............................................................. 4 CA6140 機(jī)床 `后托架的技術(shù)要求 ...................................................................... 5 加工工藝過(guò)程 ........................................................................................................ 5 確定各表面加工方案 .............................................................................................. 6 在選擇各表面及孔的加工方法時(shí)，要綜合考慮以下因素 .................................. 6 平面的加工 ..................................................................................................... 7 .................................................................................................. 7 確定定位基準(zhǔn) ........................................................................................................ 7 基準(zhǔn)的選擇 原則 ........................................................................................... 7 精基準(zhǔn) 的 選擇原則 .......................................................................................... 8 工藝路線(xiàn)的擬訂 ..................................................................................................... 9 ......................................................................................... 10 ............................................................................................ 10 加工階段的劃分 ............................................................................................ 11 加工工藝路線(xiàn)方案的比較 .............................................................................. 12 CA6140機(jī)床后托架的偏差，加工余量，工序尺寸及毛坯尺寸的確定 ..................... 14 毛坯的結(jié)構(gòu)工藝要求 ..................................................................................... 15 CA6140 機(jī)床后托架的偏差計(jì)算 ...................................................................... 16 確定切削用量及基本工時(shí)（機(jī)動(dòng)時(shí)間） ................................................................ 19 工序 1：粗、精銑底面 .................................................................................. 19 工序 2 鉆、 精、精鏜 CA6140側(cè)面三杠孔 .................................................... 21 工序 3：鉆頂面四孔 ..................................................................................... 27 工序 4：鉆側(cè)面兩孔 ..................................................................................... 30 時(shí)間定額計(jì)算及生產(chǎn)安排 ..................................................................................... 33 粗、精銑底面 ............................................................................................... 33 鉆、鏜 三杠孔 ............................................................................................... 34 鉆頂面四孔 ................................................................................................... 35 第三章 專(zhuān)用夾具設(shè)計(jì) ................................................................................... 37 本科畢業(yè)設(shè)計(jì)（論文）說(shuō)明書(shū) IV 鏜孔夾具設(shè)計(jì) ...................................................................................................... 37 研究原始資料 ............................................................................................... 37 定位基準(zhǔn)的選擇 ............................................................................................ 37 切削力及夾緊力的計(jì)算 ................................................................................. 37 誤差分析與計(jì)算 ............................................................................................ 39 ....................................................................................................... 40 研究原始資料 ...............................