【正文】 ................................................ 31 工序安排需遵循的原則 .......................................... 31 加工階段的劃分 ................................................ 31 工序順序的安排 ................................................ 32 確定工藝路線 .................................................. 32 加工余量、工序尺寸的確定 ........................................... 33 加工余量與工序余量 ............................................ 33 加工余量與工序尺寸的確定 ...................................... 34 切削用量的確定、基本時(shí)間的計(jì)算 ...................................... 35 工序 6 ........................................................ 35 工序 13 ....................................................... 36 機(jī)床工藝裝備的確定 ................................................. 38 機(jī)床設(shè)備的選擇 .................................................... 38 本科機(jī)械畢業(yè)設(shè)計(jì)論文 CAD 圖紙 401339828 V 工藝裝備的選擇 ..................................................... 38 夾具的選擇 .................................................... 38 刀具的選擇 .................................................... 39 量具的選擇 .................................................... 39 機(jī)床夾具的設(shè)計(jì) ..................................................... 40 本零件專用夾具的設(shè)計(jì) ................................................ 40 問題的提出 .................................................... 40 鉆小頭孔夾具結(jié)構(gòu)方案的確定 .................................... 40 夾具草圖的繪制 ................................................ 41 設(shè)計(jì)結(jié)語 ........................................................... 43 參考文獻(xiàn) .................................................................... 44 致謝 ........................................................................ 45 本科機(jī)械畢業(yè)設(shè)計(jì)論文 CAD 圖紙 401339828 1 第 1 章 引 言 在當(dāng) 代機(jī)械制造工業(yè)正以迅猛的步伐邁向 21 世紀(jì)，加工方法和制造工藝進(jìn)一步完 善與開拓，在傳統(tǒng)的切削、磨削技術(shù)不斷發(fā)展，上升到新的高度的同時(shí)，各種特種方法也在不斷出現(xiàn)，開拓出新的工藝可能性，達(dá)到新的技術(shù)水平，并在生產(chǎn)中發(fā)揮重要作用；加工技術(shù)向高精度發(fā)展，出現(xiàn)了所謂的 “ 精密工程 ” 、 “ 納米技術(shù) ” 。 processing technology。最后，確定加工機(jī)床和工藝裝備，并對專用夾具進(jìn)行設(shè)計(jì)。并最終確定加工工藝路線。而我要設(shè)計(jì)的三孔連桿 工藝規(guī)程的設(shè)計(jì)是從零件圖開始對零件的加工工藝進(jìn)行了分析，并通過查表、計(jì)算對 毛坯 材料、制造方法等進(jìn)行選擇確定。本設(shè)計(jì)主要內(nèi)容有普通連桿的作用、選材、毛坯的制造方法、連桿的技術(shù)要求、加工工藝路線的制定、加工設(shè)備的選擇，刀具、量具，切削用量的選擇計(jì)算等，并設(shè)計(jì)出一套加工連桿的的專用夾具，最終達(dá)到零件的技術(shù)要求。本科機(jī)械畢業(yè)設(shè)計(jì)論文 CAD 圖紙 401339828 I 摘 要 連桿是很多機(jī)械中的主要部件之 一 ，例如在汽車發(fā)動(dòng)機(jī)中有重要的作用。本設(shè)計(jì)主要介紹了普通連桿的加工工藝及其夾具設(shè)計(jì)。通過制定連桿加工工和設(shè)計(jì)夾具為工人加工連桿提供了依據(jù)。然 后根據(jù)定位基準(zhǔn)的選擇原則和所要求的加工精度，確定加工基準(zhǔn)和加工方法。參閱有關(guān)技術(shù)手冊計(jì)算確定三孔連桿的機(jī)械加工余量、工序尺寸和毛坯尺寸并繪制出了毛坯圖，計(jì)算其相關(guān)加工工序的切削用量并制作了加工工序卡片。 關(guān)鍵詞：三孔連桿；加工工藝；工裝設(shè)計(jì) 本科機(jī)械畢業(yè)設(shè)計(jì)論文 CAD 圖紙 401339828 II Abstract The connecting rod is one of the main parts of car engines, and it plays an important role in the car engines. The text mainly tells us the processing technology and the design of clamping device of vehicle engine connecting rod. The text include the function, selecting the material, the method of manufacturing the rough, the technical requirements, designing the processing route, selecting the equipments, the tools, the measuring instruments, calculating the cutting dosages, and then design the clamping device of vehicle engine connecting rod. At last, it can meet the technical requirements of the connecting rod. It can provide the basis to the workers according to formulating the processing technology and designing clamping device of vehicle engine connecting rod. From the start of the work diagram, the work of the processing was analysed. Through the lookup table and calculation ,blank materials, manufacturing methods was base was choice. Then according to the principle of datum reference and requirement of design precision,we determined the processing standards and processing method,and ultimately determine processing route. Refer to the related technical manuals,machining allowance, procedure sizes and blank dimension was determined, blank drawing was drawn. Then, calculate cutting dosages of the related processes and make proces sheets. Finally, chose the processing machine and process equipment and design special fixure. Key words: Three holes connecting rod。 jig design 本科機(jī)械畢業(yè)設(shè)計(jì)論文 CAD 圖紙 401339828 III 目錄 摘要 ......................................................................... I ABSTRACT .................................................................... II 第 1章 引 言 ................................................................. 1 第 2章 普通連桿簡介及工藝加工 ................................................. 2 連桿的主要技術(shù)要求 ................................................... 2 連桿的毛坯的確定 ..................................................... 2 連桿機(jī)械加工工藝分析與確定 ............................................ 3 ............................................. 3 定位基準(zhǔn)的分析 ................................................... 3 夾 緊方案的分析 ................................................... 3 連桿加工工藝路線的制定 ........................................... 4 ................................................ 4 工藝尺寸鏈計(jì)算 ....................................................... 4 切削加工用量的選擇原則 ................................................ 5 背吃刀量的選擇 ................................................... 5 進(jìn)給量的選擇 ..................................................... 6 切削速度的選擇 ................................................... 6 工時(shí)定額的計(jì)算 ....................................................... 6 粗銑連桿大小頭平面 ............................................... 6 粗磨大小頭平面 ................................................... 7 小頭孔的加工 ..................................................... 7 大頭兩側(cè)面的加工，即 99MM 的兩側(cè)面 ................................. 8 切開連桿體和連桿蓋 ............................................... 9 連桿體和連桿蓋結(jié)合面的加工 ...................................... 10 軸瓦鎖口槽的加工，即 5MM8 MM槽的加工 ............................ 11 粗銑螺栓座面