【正文】 宜賓職業(yè)技術(shù)學(xué)院畢業(yè)設(shè)計(jì)題目：汽車撥叉架工藝分析及其夾具設(shè)計(jì)系 部 現(xiàn)代制造工程系 專 業(yè) 名 稱 機(jī)械制造與自動(dòng)化 班 級(jí) 機(jī)制 11501 姓 名 陳 鑫 指 導(dǎo) 教 師 楊 越 摘 要本課題主要是對(duì)汽車撥叉架工藝進(jìn)行分析及其夾具設(shè)計(jì)。主要有對(duì)零件的作用、主要技術(shù)要求、工藝進(jìn)行分析。然后對(duì)零件工藝的規(guī)程設(shè)計(jì)，確定其毛坯的制造形式、I / 37基面的選擇，制定出工藝路線。確定機(jī)械加工余量、工序尺寸及毛坯尺寸。確定切削用量及基本用時(shí)。最后根據(jù)夾具組成、分類、特點(diǎn)、技術(shù)要求，設(shè)計(jì)出專用夾具。關(guān)鍵詞：撥叉架；工藝設(shè)計(jì)；夾具設(shè)計(jì)目 錄1 緒論 .........................................................................................................................................12 撥叉的工藝分析及生產(chǎn)類型的確定 .....................................................................................2 撥叉的用途 .........................................................................................................................2 撥叉的技術(shù)要求 .................................................................................................................2 審查撥叉的工藝性 .............................................................................................................3 確定撥叉的生產(chǎn)類型 .........................................................................................................33 確定毛坯、繪制毛坯簡(jiǎn)圖及零件圖 .....................................................................................4 選擇毛坯 .............................................................................................................................4 確定毛坯的尺寸公差和機(jī)械加工余量 .............................................................................4 基本參數(shù) .....................................................................................................................4 公差等級(jí) .....................................................................................................................5 公差帶的位置 .............................................................................................................54 擬定撥叉工藝路線 .................................................................................................................5 定位基準(zhǔn)的選擇 .................................................................................................................5 精基準(zhǔn)的選擇 .............................................................................................................5 粗基準(zhǔn)的選擇 .............................................................................................................6 表面加工方法的確定 .........................................................................................................6 加工階段的劃分 .................................................................................................................7 工序的集中與分散 .............................................................................................................7 工序順序的安排 .................................................................................................................8 機(jī)械加工工序 .............................................................................................................8 熱處理工序 .................................................................................................................8 輔助工序 .....................................................................................................................8 確定工藝路線 .....................................................................................................................81 / 375 加工余量、工序尺寸和公差的確定 ...................................................................................106 切削用量、時(shí)間定額的計(jì)算 ...............................................................................................17 切削用量的計(jì)算 ...............................................................................................................17 時(shí)間定額的計(jì)算 ...............................................................................................................20 基本時(shí)間 的計(jì)算 ..................................................................................................20mt 輔助時(shí)間 的計(jì)算 ...................................................................................................21a 其他時(shí)間的計(jì)算 .......................................................................................................22 單件時(shí)間 的計(jì)算 ..................................................................................................22djt7 夾具設(shè)計(jì) ...............................................................................................................................24 夾具的分類 .......................................................................................................................24 夾具的分析 ...........................................................