机械5

摘要 本次设计的题目是端盖加工工艺规程制定及钻4-φ9孔专用夹具设计，在掌握零件作用的基础上，对零件的工艺进行分析。针对设计给定的题目，设计中主要对机床夹具进行设计。本夹具体是以保证加工精度，生产效率和便于工人操作为宗旨展开的设计。 设计之初我查阅相关数据及国内外关于机床夹具的文献，在看懂零件图的同时对零件的结构和工艺进行分析，明确粗基准和精基准的选择，确定零件的加工余量与毛坯的尺寸、从而确定零件的加工工艺过程、计算各工序的切削用量及工时。最终完成了本次设计所需的夹具。 关键词：端盖；加工工艺；钻4-φ9孔；专用夹具；夹具设计;切削用量 Abstract The title of this desig
n is the formulatio
n of e
nd cover processi
ng process a
nd the desig
n of special fixture for drilli
ng 4-φ 9 holes. O
n the basis of masteri
ng the fu
nctio
n of the parts, the process of the parts is a
nalyzed. Aimi
ng at the give
n problems of the desig
n, the fixture of the machi
ne tool is mai
nly desig
ned i
n the desig
n. This clip is desig
ned to e
nsure machi
ni
ng accuracy, productio
n efficie
ncy a
nd easy operatio
n for workers. At the begi
n
ni
ng of the desig
n, I co
nsulted the releva
nt data a
nd the literature o
n machi
ne tool fixtures at home a
nd abroad, a
nalyzed the structure a
nd process of the parts while readi
ng the drawi
ng of the parts, made clear the selectio
n of the rough refere
nce a
nd the precisio
n refere
nce, determi
ned the machi
ni
ng allowa
nce a
nd the size of the bla
nk, so as to determi
ne the machi
ni
ng process of the parts a
nd calculate the cutti
ng parameters a
nd worki
ng hours of each process. Fi
nally, the fixture
needed for this desig
n is completed. Key words: e
nd cover; processi
ng tech
nology; drill 4-φ 9 hole;special fixture; fixture desig
n; cutti
ng parameter 目录 摘要II Abstract III 第1部分零件的分析1 1.1零件的作用1 1.2零件的工艺分析1 1.3确定端盖的生产类型........................................1 1.4端盖的技术要求................................................2 第2部分确定毛坯3 2.1选择毛坯3 2.2确定锻造毛坯的尺寸公差和机械加工余量4 2.2.1确定铸件公差等级4 2.2.2铸件尺寸公差及加工余量4 2.2.3绘制端盖毛坯简图.....................................4 第3部分工艺规程设计5 3.1定位基准的选择5 3.1.1精基准的选择............................................5 3.1.2粗基准的选择5 3.2表面加工方法的确定5 3.3加工阶段的划分6 3.4工序顺序的安排6 3.4.1机械加工工序............................................6 3.4.2热处理工序..............................................6 3.4.3辅助工序...................................................6 3.5工艺过程设计........................................................7 3.5.1设计工艺过程及选择工艺设备........................7 3.5.2确定工序尺寸.................................................7 3.6切削用量、时间定额的计算...................................8 3.6.1切削用量的计算..............................................8 3.6.2时间定额的计算..............................................8 第4部分夹具设计.........................................................8 4.1问题的提出............................................................9 4.2夹具设计................................................................9 4.2.1定位分析.........................................................9 4.2.2切削力及预紧力的计算...................................10 4.2.3夹具操作说明..................................................10 4.2.4确定导向装置.................................................11 4.2.5钻床夹具的装配图..........................................11 参考文献..................................................................12