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攀枝花學(xué)院畢業(yè)設(shè)計(jì)（論文） 目 錄
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銑槽夾具設(shè)計(jì)........................................................................................................27
4.1.1研究原始質(zhì)料.................................................................................................27
4.1.2定位基準(zhǔn)的選擇..............................................................................................27
4.1.3夾具方案的設(shè)計(jì)選擇.......................................................................................27
4.1.4切削力及夾緊分析計(jì)算...................................................................................27
4.1.5誤差分析與計(jì)算..............................................................................................29
4.1.6夾具設(shè)計(jì)及操作的簡要說明............................................................................29
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)及操作的簡要說明............................................................................32
4.3 本章總結(jié)..............................................................................................................32
5 花鍵孔25H7拉刀設(shè)計(jì)..........................................................................................33
5.1拉刀的結(jié)構(gòu)參數(shù)....................................................................................................33
5.1.1拉削特點(diǎn)........................................................................................................33
5.1.2拉刀類型選擇.................................................................................................33
5.1.3拉刀材料選擇.................................................................................................33
5.1.4拉床類型選擇.................................................................................................33
5.2拉刀切削部分的設(shè)計(jì).............................................................................................33
5.2.1拉削方式選擇.................................................................................................33
5.2.2齒型確定........................................................................................................33
5.2.3拉削余量的確定.............................................................................................34
5.2.4刀齒幾何參數(shù)選擇..........................................................................................34
5.2.5確定齒升量....................................................................................................34
5.2.6確定齒距及同時(shí)工作齒數(shù)...............................................................................35
5.2.7確定容屑槽形狀和尺寸...................................................................................35
5.2.8設(shè)計(jì)分屑槽.............................................................................../....................36
5.2.9確定拉刀齒數(shù)和直徑......................................................................................37
5.3拉刀其他部分設(shè)計(jì)................................................................................................38
5.3.1拉刀柄部設(shè)計(jì)................................................................................................38
5.3.2頸部與過渡錐部設(shè)計(jì)......................................................................................38
5.3.3前導(dǎo)部、后導(dǎo)部設(shè)計(jì)......................................................................................39
5.3.4拉刀總長度....................................................................................................39
5.4拉刀強(qiáng)度及拉床拉力校驗(yàn)......................................................................................40
5.4.1 拉削力..........................................................................................................40
5.4.2 拉刀強(qiáng)度校驗(yàn)................................................................................................41
5.4.3 拉床拉力校驗(yàn)................................................................................................41
5.5 本章總結(jié)..............................................................................................................42
6 結(jié)論..........................................................................................................................43
參考文獻(xiàn)......................................................................................................................44
致 謝............................................................................................................................45
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