《零件的结构工艺性》教学课件

《零件的结构工艺性》幻灯片本课件PPT仅供大家学习使用学习完请自行删除，谢谢！本课件PPT仅供大家学习使用学习完请自行删除，谢谢！本课件PPT仅供大家学习使用学习完请自行删除，谢谢！本课件PPT仅供大家学习使用学习完请自行删除，谢谢！《零件的结构工艺性》幻灯片本课件PPT仅供大家学习使Castingstructure铸件构造SandboxcoverOverflowPouringhead

上砂箱冒口浇口1.

Draft起模斜度:The120〔≈3°〕draftalongthedrawingdirectionofthepatternfacilitatestotakeoutthepatternwhilemolding.铸件造型时，为便于取出木模，沿脱模方向的外表做出120〔≈3°〕的起模斜度。请点击鼠标左键显示后面内容Ifthedraftisverysmall,itcanbeomitted,Ifnecessary,itcanbeincludedintechnical.起模斜度较小时,在图中一般不画出,必要时可注写在技术要求中。Sandbox下砂箱Model模型Cavity型腔Sand型砂Castingstructure铸件构2.Filletsincastings铸造圆角:Theremustbearadiuswheretwosurfacesmeet,inordertoavoidsanddropswhileremovingthemouldandshrinkagecavityandshrinkagecrackwhilecooling.在铸件外表相交处应有圆角,以免脱模时砂型落砂,同时防止铸件冷却时产生裂纹或缩孔。Machinesymbol机加工符号请点击鼠标左键显示后面内容Castingstructure铸件构造Theintersectionlineisneededinordertodistinguishthevarioussurfaces.Theonewehaveprovidediscalledrun-outline.Therepresentationofatransitionlineissimilartothatofintersectionline.Theonlydifferenceisthattheendoftherun-outlineisnotconnectedwiththecontourlineoftheradius,andthelinestyleisathinsolidline.为了区分不同形体的外表,仍要画出相贯线,这种相贯线称为过渡线。过渡线的画法和相贯线一样,只是其端点处不与圆角轮廓线接触,且线型为细实线。2.Filletsincastings铸造圆角:3.Wallthickness铸件的壁厚:Toavoidshrinkagecavityandshrinkagecrackcausedbydifferentcoolingspeeds.Duringthedesignphase,itisamusttomaintainuniformwallthicknessorasmooth.Onemustavoidunequaldesignssuchasthicknessabruptvaryingorlocalthickpartialareas.为防止浇铸零件时,由于壁厚不匀而冷却速度不同产生的缩孔和裂纹,在设计铸件时,应使壁厚尽量均匀或逐渐过渡,以防止壁厚突变或局部肥大的不匀现象。Dedectivness

有缺陷Defectivness

有缺陷请点击鼠标左键显示后面内容Smoothtransition

平滑过渡Castingstructure铸件构造Maintainuniformwallthickness壁厚均匀3.Wallthickness铸件的壁厚:1.Bossclubandrecessedsurface凸台与凹坑：

Usually,allsurfacesmountedonotherpartsneedtobemachined.Thebossorrecessedsurfaceisaddedtokeepgoodcontactbetweenthesurfacesoftwopartsandtoreducethemachiningareaandmanufacturingcost.零件上凡与其他零件接触的外表一般都要加工，为了保证两零件外表的良好接触，同时减少加工面积，以降低制造费用，在零件的需接触外表处常设计成凸台、凹坑的形式。请点击鼠标左键显示后面内容凸台凹坑高度不一致,导致加工调刀工时费、成本高Commonmachiningstructures机加工常见构造Onemustavoidunequaldesigns

应避免凸台凹坑高度不一致1.Bossclubandrecessedsurf2.

Chamferandround倒角与圆角:Toeliminateburrsandflashesinordertopreventhumanhandsfromcuttingandtofacilitatemounting,theendsofboththeshaftandtheholeusuallyneedtobechamfered.为了去除零件的毛刺、锐边，以防止划伤人手和便于装配，在轴和孔的端部通常需加工出倒角。Avoidcracks防止断裂Thatis,thesharpedgeofshaftendiscutbyaconicalcuttingtoolwitha45°degreeapexangle.即用一锥顶角为45°的圆锥刀头切除其端部锐边。请点击鼠标左键显示后面内容Commonmachiningstructures机加工常见构造C22×C2Anarctransitionusuallyremainsattheshaftshoulder,whichiscalledround,inordertoavoidcrackscausedbypressureconcentration.在轴肩处，常常制成圆弧过渡，即圆角，以防止因应力集中而产生裂纹。2.Chamferandround倒角与圆角:Commonmachiningstructures机加工常见构造Undercut退刀槽Undercut退刀槽Grindingundercut砂轮越程槽Grindingundercut砂轮越程槽Grindingsurface精磨外表Grindingsurface精磨外表3.

Escapeandgrindingundercut螺纹退刀槽和砂轮越程槽:Anescape,grindingortravelinglimitundercutneedstobeproducedattheendofthesurfacetobemachined,inordertoeasilywithdrawthecutterorgrindingwheelwhiletappingorgrindingexternaldiameter.在车削螺纹或磨外圆时,为便于退刀或使用砂轮,需要在待加工面末端先切出退刀槽或砂轮越程槽。请点击鼠标左键显示后面内容Thedimensionoftheescapeisidentifiedas‘width×depth’or‘width×diameter’.退刀槽及越程槽的尺寸注成“宽度×深度〞或“宽度×直径〞。Commonmachiningstructures机加Theaxisofthedrillshouldbeperpendiculartothesurfacetobedrilled,inordertoensurecorrectdrillingpositionandpreventthedrillfrombreakingcausedbyunequalimpactforce.用钻头钻孔时，为保证钻孔位置准确和防止钻头因受力不均而折断，应使钻头轴线垂直于被钻孔零件的外表。请点击鼠标左键显示后面内容Structureofdrillhole钻孔构造Theintersectionpointwheretheholeandtheobliqueplanemeetisnecessarytosettoplatformandnotchstructure.Iftheanglebetweenthedrillandtheobliqueplaneislargerthan60°,onecandrilltheholedirectly.在与孔轴线倾斜的外表处,常需设计出平台或凹坑构造,但当钻头与倾斜面的夹角大于60°时,也可以直接钻孔。Theaxisofthedrillshoul本小节结束谢谢您的认真学习！退出前一页本小节结束谢谢您的认真学习！退出前一页Castingstructure铸件构造不与轮廓线接触在图片上点击鼠标左键“暂停〞或再次“播放〞Castingstructure铸件构Castingstructure铸件构造在切点附近断开在图片上点击鼠标左键“暂停〞或再次“播放〞Castingstructure铸件构Castingstructure铸件构造在图片上点击鼠标左键“暂停〞或再次“播放〞Castingstructure铸件构Castingstructure铸件构造在图片上点击鼠标左键“暂停〞或再次“播放〞Castingstructure铸件构Commonmachiningstructures机加工常见构造Commonmachiningstructures机加请点击鼠标左键显示后面内容Grindingsurfacebygrindingwheel砂轮正在精磨工件的外表Commonmachiningstructures机加工常见构造请GrindingsurfacebygrindingStructureofdrillhole钻孔构造Surfacestructureofthedrillhole钻孔的外表构造

Representationoftheholeanddimensionofadrill钻孔的尺寸标注StructureofdrillholeGrindingexternaldiameterbygrindingwheel

砂轮正在精磨斜齿轴的外圆面Grindingundercut砂轮越程槽Commonmachiningstructures机加工常见构造Grindingexternaldiameterby在图片上点击鼠标左键可以“暂停〞或再次“播放〞在图片上点击鼠标左键可以“暂停〞或再次“播放〞在图片上点击鼠标左键可以“暂停〞或再次“播放〞在图片上点击鼠标左键可以“暂停〞或再次“播放〞在图片上点击鼠标左键可以“暂停〞或再次“播放〞在图片上点击鼠标左键可以“暂停〞或再次“播放〞在图片上点击鼠标左键可以“暂停〞或再次“播放〞在《零件的结构工艺性》幻灯片本课件PPT仅供大家学习使用学习完请自行删除，谢谢！本课件PPT仅供大家学习使用学习完请自行删除，谢谢！本课件PPT仅供大家学习使用学习完请自行删除，谢谢！本课件PPT仅供大家学习使用学习完请自行删除，谢谢！《零件的结构工艺性》幻灯片本课件PPT仅供大家学习使Castingstructure铸件构造SandboxcoverOverflowPouringhead

上砂箱冒口浇口1.

Draft起模斜度:The120〔≈3°〕draftalongthedrawingdirectionofthepatternfacilitatestotakeoutthepatternwhilemolding.铸件造型时，为便于取出木模，沿脱模方向的外表做出120〔≈3°〕的起模斜度。请点击鼠标左键显示后面内容Ifthedraftisverysmall,itcanbeomitted,Ifnecessary,itcanbeincludedintechnical.起模斜度较小时,在图中一般不画出,必要时可注写在技术要求中。Sandbox下砂箱Model模型Cavity型腔Sand型砂Castingstructure铸件构2.Filletsincastings铸造圆角:Theremustbearadiuswheretwosurfacesmeet,inordertoavoidsanddropswhileremovingthemouldandshrinkagecavityandshrinkagecrackwhilecooling.在铸件外表相交处应有圆角,以免脱模时砂型落砂,同时防止铸件冷却时产生裂纹或缩孔。Machinesymbol机加工符号请点击鼠标左键显示后面内容Castingstructure铸件构造Theintersectionlineisneededinordertodistinguishthevarioussurfaces.Theonewehaveprovidediscalledrun-outline.Therepresentationofatransitionlineissimilartothatofintersectionline.Theonlydifferenceisthattheendoftherun-outlineisnotconnectedwiththecontourlineoftheradius,andthelinestyleisathinsolidline.为了区分不同形体的外表,仍要画出相贯线,这种相贯线称为过渡线。过渡线的画法和相贯线一样,只是其端点处不与圆角轮廓线接触,且线型为细实线。2.Filletsincastings铸造圆角:3.Wallthickness铸件的壁厚:Toavoidshrinkagecavityandshrinkagecrackcausedbydifferentcoolingspeeds.Duringthedesignphase,itisamusttomaintainuniformwallthicknessorasmooth.Onemustavoidunequaldesignssuchasthicknessabruptvaryingorlocalthickpartialareas.为防止浇铸零件时,由于壁厚不匀而冷却速度不同产生的缩孔和裂纹,在设计铸件时,应使壁厚尽量均匀或逐渐过渡,以防止壁厚突变或局部肥大的不匀现象。Dedectivness

有缺陷Defectivness

有缺陷请点击鼠标左键显示后面内容Smoothtransition

平滑过渡Castingstructure铸件构造Maintainuniformwallthickness壁厚均匀3.Wallthickness铸件的壁厚:1.Bossclubandrecessedsurface凸台与凹坑：

Usually,allsurfacesmountedonotherpartsneedtobemachined.Thebossorrecessedsurfaceisaddedtokeepgoodcontactbetweenthesurfacesoftwopartsandtoreducethemachiningareaandmanufacturingcost.零件上凡与其他零件接触的外表一般都要加工，为了保证两零件外表的良好接触，同时减少加工面积，以降低制造费用，在零件的需接触外表处常设计成凸台、凹坑的形式。请点击鼠标左键显示后面内容凸台凹坑高度不一致,导致加工调刀工时费、成本高Commonmachiningstructures机加工常见构造Onemustavoidunequaldesigns

应避免凸台凹坑高度不一致1.Bossclubandrecessedsurf2.

Chamferandround倒角与圆角:Toeliminateburrsandflashesinordertopreventhumanhandsfromcuttingandtofacilitatemounting,theendsofboththeshaftandtheholeusuallyneedtobechamfered.为了去除零件的毛刺、锐边，以防止划伤人手和便于装配，在轴和孔的端部通常需加工出倒角。Avoidcracks防止断裂Thatis,thesharpedgeofshaftendiscutbyaconicalcuttingtoolwitha45°degreeapexangle.即用一锥顶角为45°的圆锥刀头切除其端部锐边。请点击鼠标左键显示后面内容Commonmachiningstructures机加工常见构造C22×C2Anarctransitionusuallyremainsattheshaftshoulder,whichiscalledround,inordertoavoidcrackscausedbypressureconcentration.在轴肩处，常常制成圆弧过渡，即圆角，以防止因应力集中而产生裂纹。2.Chamferandround倒角与圆角:Commonmachiningstructures机加工常见构造Undercut退刀槽Undercut退刀槽Grindingundercut砂轮越程槽Grindingundercut砂轮越程槽Grindingsurface精磨外表Grindingsurface精磨外表3.

Escapeandgrindingundercut螺纹退刀槽和砂轮越程槽:Anescape,grindingortravelinglimitundercutneedstobeproducedattheendofthesurfacetobemachined,inordertoeasilywithdrawthecutterorgrindingwheelwhiletappingorgrindingexternaldiameter.在车削螺纹或磨外圆时,为便于退刀或使用砂轮,需要在待加工面末端先切出退刀槽或砂轮越程槽。请点击鼠标左键显示后面内容Thedimensionoftheescapeisidentifiedas‘width×depth’or‘width×diameter’.退刀槽及越程槽的尺寸注成“宽度×深度〞或“宽度×直径〞。Commonmachiningstructures机加Theaxisofthedrillshouldbeperpendiculartothesurfacetobedrilled,inordertoensurecorrectdrillingpositionandpreventthedrillfrombreakingcausedbyunequalimpactforce.用钻头钻孔时，为保证钻孔位置准确和防止钻头因受力不均而折断，应使钻头轴线垂直于被钻孔零件的外表。请点击鼠标左键显示后面内容Structureofdrillhole钻孔构造Theintersectionpointwheretheholeandtheobliqueplanemeetisnecessarytosettoplatformandnotchstructure.Iftheanglebetweenthedrillandtheobliqueplaneislargerthan60°,onecandrilltheholedirectly.在与孔轴线倾斜的外表处,常需设计出平台或凹坑构造,但当钻头与倾斜面的夹角大于60°时,也可以直接钻孔。Theaxisofthedrillshoul本小节结束谢谢您的认真学习！退出前