【正文】 少產(chǎn)品的設(shè)計(jì)與生產(chǎn)成本，增加企業(yè)效益 。 四、 接受任務(wù)學(xué)生： 機(jī)械 91 班 姓名 吳勇杰 五、 開(kāi)始及完成日期： 自 2020 年 11 月 12 日 至 2020 年 5 月 25 日 六、 設(shè)計(jì)（論文）指導(dǎo)（或顧問(wèn)）： 指導(dǎo)教師 簽名 簽名 簽名 教研室主任 〔 學(xué)科組組長(zhǎng)研究所所長(zhǎng) 〕 簽名 系主任 簽名 2020 年 11 月 12 日全套設(shè)計(jì)（圖紙）請(qǐng)聯(lián)系 174320523 各專業(yè)都有 摘 要 本文是對(duì)曲軸零件三維造型及零件的機(jī)械加工工藝路線的設(shè)計(jì)，并根據(jù)加工工序的要求完成對(duì)夾具的設(shè)計(jì)。 曲軸作為軸類零件，其主要加工表面是外圓及端面。按照機(jī)械加工工藝要求，需遵循先面后孔的原則，并且為了保證加工精度將孔與平面的加工明確劃分成粗加工和精加工階段。 在零件的夾具設(shè)計(jì)中，主要是根據(jù)零件加工工序要求，分析應(yīng)當(dāng)限制的自由度的數(shù)量，進(jìn)而根據(jù)零件的表面特征選定定位元件，再分析所選定位元件能否限定應(yīng)限自由度。 關(guān)鍵詞： 曲軸；加工工藝；工序；專用夾具 全套設(shè)計(jì)（圖紙）請(qǐng)聯(lián)系 174320523 各專業(yè)都有 Abstract This paper is the design of line machining technology of the three dimension modeling and parts of Crankshaft parts. According to desire, the author designed the fixture of the workpiece. Three dimension modeling described the process of the workpiece. Then auto generated the puter program according to the modeling. The Crankshaft ponents as a class of axis, its main processing surface are the plane and the cylindrical. According to the machinefinishing technological requirement, after following the first surface then the hole principle, and is clear about the hole and the plane processing divides the rough machining and the precision work stage guarantees the working accuracy. The datum choice takes the cylindrical surface by the support surface, takes the fine datum by the support two center holes, had determined in its processing39。 machining processing。 special fixture 全套設(shè)計(jì)（圖紙）請(qǐng)聯(lián)系 174320523 各專業(yè)都有 目 錄 摘 要 ............................................................................................................................................ III ABSTRACT .................................................................................................................................. IV 目錄 ................................................................................................................................................ V 1 緒論 ............................................................................................................................................. 1 本課題的研究?jī)?nèi)容和意義 ............................................................................................... 1 國(guó)內(nèi)外的發(fā)展概況 ........................................................................................................... 1 本課題應(yīng)達(dá)到的要求 ....................................................................................................... 2 2 零件的造型 ................................................................................................................................. 4 零件造型軟件的介紹 ...................................................................................................... 4 零件造型的流程 .............................................................................................................. 4 3 零件的工藝分析 ......................................................................................................................... 8 零件的工藝分析 .............................................................................................................. 8 零件的功用分析 .............................................................................................................. 8 軸類零件的功用 ......................................................................................................... 8 軸類零件的主要技術(shù)要求 ......................................................................................... 8 軸類零件的材料、毛坯及熱處理 ............................................................................. 9 4 零件工藝規(guī)程的設(shè)計(jì) ............................................................................................................... 10 確定制造毛坯的方式 .................................................................................................... 10 加工方法分析及確定 .................................................................................................... 10 加工順序的安排 ............................................................................................................ 10 定位基準(zhǔn)的選擇 ............................................................................................................ 10 選擇定位基準(zhǔn)的方法 ............................................................................................... 10 軸類零件的定位基準(zhǔn)與裝夾方法 ........................................................................... 12 擬定加工零件的工藝路線 ............................................................................................ 13 5 毛坯尺寸、工序尺寸和機(jī)械加工余量的確定 ....................................................................... 17 工序尺寸及公差的確定 ................................................................................................ 17 設(shè)備及工藝裝備的確定 ................................................................................................ 20 切削用量及工時(shí)定額的確定 ........................................................................................ 20 6 鉆 4φ 22 孔專 用夾具設(shè)計(jì) ..................................................................................................... 26 指出加工過(guò)程中的問(wèn)題 ................................................................................................ 26 機(jī)床夾具的作用 ....................................................................................................... 26 鉆床夾具的類型 ....................................................................................................... 26 鉆夾具選擇的原則 ................................................................................................... 27 夾具的設(shè)計(jì) ...............................................