【正文】 分 類 號(hào) 密 級(jí) 寧寧波大紅鷹學(xué)院 畢業(yè)設(shè)計(jì) (論文 ) 汽車支架沖壓模具設(shè)計(jì) 所在學(xué)院 專 業(yè) 班 級(jí) 姓 名 學(xué) 號(hào) 指導(dǎo)老師 年 月 日 誠(chéng) 信 承 諾 我謹(jǐn)在此承諾：本人所寫的畢業(yè)論文《 汽車支架沖壓模具設(shè)計(jì) 》均系本人獨(dú)立完成，沒有抄襲行為，凡涉及其他作者的觀點(diǎn)和材料，均作了注釋，若有不實(shí)，后果由本人承擔(dān)。 承諾人（簽名）： 年 月 日 I 摘 要 本設(shè)計(jì)主要圍繞沖壓模具設(shè)計(jì)展開，設(shè)計(jì)宗旨為降低生產(chǎn)成本，提高生產(chǎn)效率，提高模具壽命，而且要求操作方便，維修簡(jiǎn)單。 本次設(shè)計(jì)的課題是沖壓成形，其形狀比較簡(jiǎn)單，精度要求不高，精度等級(jí)使用 IT14即可，整個(gè)設(shè)計(jì)過程中包括模具的結(jié)構(gòu)分析與主要零件的計(jì)算。根據(jù)模具尺寸選擇安裝相應(yīng)的模架，在設(shè)計(jì)時(shí)對(duì)模具的質(zhì)量、模具的壽命、生產(chǎn)周期及生產(chǎn)成本等因素進(jìn)行了全面仔細(xì)的分析。總的設(shè)計(jì)過程為從零件工藝的分析到確定工藝方案然后到 模具的設(shè)計(jì)和裝配。通過本次設(shè)計(jì)，靈活運(yùn)用所學(xué)知識(shí)，加深對(duì)模具設(shè)計(jì)、機(jī)械加工、公差、熱處理等內(nèi)容的掌握，提高了獨(dú)立解決問題的能力。 關(guān)鍵詞： 沖壓成形 ， 模具設(shè)計(jì) ,機(jī)械加工 II Abstract The main contents of this design is about the design of the stamping dies , its aim at lower the production cost , increasing production efficiency ,lift the molding tool life span and request for operate convenience , fix briefly and easily . This design is stamping forming, its shape is quite simple, the precision request is not high, the precision class uses IT14 is may,the whole design process include the calculation of the structure analytical and main spare parts of molding tool . According to the molding tool size , choice install an accordingly homologous mold, while designing the life span of the molding , the economy of the molding tool, produce period and production cost should carried on under overall careful design process for analyze part process then arrive sure the process program and finally the design and assembly of the this design, nimble utilization the knowledge of studies, deepen understand the content of the mold design, the machinefinishing, the tolerance, the heat treatment and exercise the ability of solve the question independently . Key Words: Stamping forming,Mold design,Machining III 目 錄 摘 要 ......................................................................................................................................... I Abstract.......................................................................................................................................II 目 錄 ...................................................................................................................................... III 1 前言 ............................................................................................................................ 6 模具的簡(jiǎn)介 ................................................................................................................ 7 沖壓的概念及其優(yōu)點(diǎn) .............................................................................................. 7 課題國(guó)內(nèi)外現(xiàn)狀 ......................................................................................................... 8 未來沖壓模具制造技術(shù)發(fā)展趨勢(shì) ........................................................................... 10 2 沖壓件工藝分析 ........................................................................................................ 11 沖壓件材料分析 ....................................................................................................... 11 沖壓件結(jié)構(gòu)工藝性及分析 .................................................................................... 12 確定工藝方案模具結(jié)構(gòu)類型 ................................................................................ 13 定位裝置 ............................................................................................................ 15 卸料裝置 .......................................................................................................... 15 導(dǎo)向裝置 ............................................................................................................ 15 3 工藝計(jì)算 ...................................................................................................................... 15 沖壓件展開尺寸計(jì)算 ............................................................................................... 15 彎曲中性層位置的確定 ....................................................................................... 16 彎曲件坯料尺寸的計(jì)算 ....................................................................................... 16 材料的規(guī)格選擇 ....................................................................................................... 17 排樣圖的設(shè)計(jì)與利用率的計(jì)算 ............................................................................... 18 排樣圖的設(shè)計(jì) ....................................................................................................... 18 排樣圖的利用率的計(jì)算 ....................................................................................... 21 沖壓工藝力的計(jì)算 ................................................................................................... 22 ． 1沖壓力 ................................................................................................................. 22 翻邊部分的翻邊力計(jì) 算： ............................................................................................. 22 IV 4 沖孔落料模的主要零部件設(shè)計(jì) ................................................................................ 23 孔凸模的設(shè)計(jì) .................................................................................................................... 23 凸模長(zhǎng)度計(jì)算 ................................................................................................................. 25 承壓應(yīng)力校驗(yàn) ................................................................................................................. 25 落料凸模設(shè)計(jì) ................................................................................................................... 26 凸模承壓力校核 ： ......................................................................................................... 26 抗縱向彎曲應(yīng)力的校核： ............................................................................................ 27 切斷凸模固定端面的壓力 .............................................................................