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目 錄
摘要…………………………....………………….……………………...Ⅰ
ABSTRACT.....................................................................................................Ⅱ
1 緒論..........................................................................................................3
2 撥叉C的分析.............................................................................................4
2.1撥叉C的作用...........................................................................................4
2.2撥叉C的工藝分析.....................................................................................4
2.3撥叉C的工藝要求.....................................................................................4
2.4毛坯的選擇..............................................................................................5
2.5 本章總結(jié)................................................................................................5
3 工藝規(guī)程設(shè)計(jì).............................................................................................6
3.1加工工藝過(guò)程...........................................................................................6
3.2確定各表面加工方案..................................................................................6
3.2.1選擇加工方法時(shí)，需考慮的因素.............................................................6
3.2.2面的加工...........................................................................................6
3.2.3孔的加工...........................................................................................7
3.2.4槽的加工...........................................................................................7
3.3確定定位基準(zhǔn)...........................................................................................7
3.3.1粗基準(zhǔn)的選擇.....................................................................................7
3.3.2精基準(zhǔn)選擇的原則...............................................................................8
3.4工藝路線的擬訂........................................................................................8
3.4.1工序的合理組合..................................................................................8
3.4.2工序的集中與分散...............................................................................9
3.4.3加工階段的劃分................................................................................10
3.4.4加工工藝路線方案的比較....................................................................11
3.5撥叉C的偏差，加工余量，工序尺寸及毛坯尺寸的確定.......................................12
3.5.1毛坯的結(jié)構(gòu)工藝要求..........................................................................12
3.5.2撥叉C的偏差計(jì)算.............................................................................13
3.6確定切削用量及基本工時(shí)（機(jī)動(dòng)時(shí)間）..........................................................14
3.7時(shí)間定額計(jì)算及生產(chǎn)安排..........................................................................22
3.7.1鉆預(yù)制孔.........................................................................................22
3.7.2鉆預(yù)制孔.........................................................................................23
3.7.3拉25H7內(nèi)花鍵................................................................................23
3.7.4粗、精銑18H11底槽........................................................................................23
3.7.5粗、精銑上端面...............................................................................................24
3.7.6鉆、攻2-M8螺紋孔.........................................................................................25
3.8 本章總結(jié)..............................................................................................................26
4 專用夾具設(shè)計(jì)..........................................................................................................27
4.1夾具設(shè)計(jì)概述........................................................................................................27
4.2鉆、攻2—M8螺紋孔夾具設(shè)計(jì)..................................................................................30
4.2.1研究原始質(zhì)料.................................................................................................30
4.2.2定位基準(zhǔn)的選擇..............................................................................................30
4.2.3夾具方案的設(shè)計(jì)選擇.......................................................................................30
4.2.4切削力及夾緊力的計(jì)算...................................................................................30
4.2.5誤差分析與計(jì)算..............................................................................................31
4.2.6夾具設(shè)計(jì)及操作的簡(jiǎn)要說(shuō)明............................................................................32
4.3 本章總結(jié)..............................................................................................................32
結(jié)論..........................................................................................................................43
參考文獻(xiàn)......................................................................................................................44
致 謝............................................................................................................................45
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