机械5

摘要 本次设计内容涉及了机械制造工艺及机床夹具设计、金属切削机床、公差配合与测量等多方面的知识。 发动机汽缸盖加工工艺过程和铰孔工装的设计是包括零件加工的工艺设计、工序设计以及专用夹具的设计三部分。在工艺设计中要首先对零件进行分析，了解零件的工艺再设计出毛坯的结构，并选择好零件的加工基准，设计出零件的工艺路线；接着对零件各个工步的工序进行尺寸计算，关键是决定出各个工序的工艺装备及切削用量；然后进行专用夹具的设计，选择设计出夹具的各个组成部件，如定位元件、夹紧元件、引导元件、夹具体与机床的连接部件以及其它部件；计算出夹具定位时产生的定位误差，分析夹具结构的合理性与不足之处，并在以后设计中注意改进。 关键词：发动机汽缸盖;加工工艺;铰孔;工序;专用夹具 Abstract This desig
n i
nvolves mecha
nical ma
nufacturi
ng tech
nology a
nd machi
ne tool fixture desig
n, metal cutti
ng machi
ne tools, tolera
nce coordi
natio
n a
nd measureme
nt a
nd so o
n. The machi
ni
ng process of e
ngi
ne cyli
nder head a
nd the desig
n of reami
ng tooli
ng are three parts, i
ncludi
ng process desig
n, process desig
n a
nd special fixture desig
n. I
n the process desig
n, the parts are a
nalyzed first, the process of the parts is redesig
ned a
nd the structure of the bla
nk is redesig
ned. The process datum of the parts is selected a
nd the process route of the part is desig
ned. The
n the size calculatio
n of theworki
ng procedure of the parts is calculated, the key is to determi
ne the process equipme
nt a
nd the cutti
ng amou
nt of thevariousworki
ng order; the
n, the key is to determi
ne the amou
nt of the process equipme
nt a
nd the cutti
ng amou
nt. The desig
n of the special fixture is carried out, a
nd the compo
ne
nts of the fixture are desig
ned, such as the positio
ni
ng eleme
nt, the clampi
ng eleme
nt, the guidi
ng eleme
nt, the co
n
necti
ng partswith the machi
ne tool a
nd the other parts. The positio
ni
ng error is calculatedwhe
n the fixture is positio
ned, a
nd the ratio
nality a
nd i
nadequacies of the fixture structure are a
nalyzed, a
nd the desig
n is i
njected i
n the future. It is i
nte
nded to be improved. Keywords: e
ngi
ne cyli
nder cover; processi
ng tech
nology; reami
ng; process; special fixture 目录 摘要I Abstract II 序言1 第1章零件的分析2 1.1零件的分析2 1.2零件的主次表面2 1.3零件表面的技术要求3 1.4结构工艺性分析3 第2章计算生产纲领、确定生产类型4 2.1生产纲领4 2.2生效率分析4 2.3生产类型4 第3章毛坯的制造方法6 3.1确定毛坯的制造形式6 3.2毛坯尺寸公差6 3.3毛坯简图6 第4章制订工艺路线7 4.1定位基准选择7 4.1.1粗基准的选择原则7 4.1.2精基准选择的原则7 4.2定位误差8 4.3选择加工方法8 4.4划分加工阶段8 4.5工序的集中与分散9 4.6确定工序顺序9 4.7制定工艺路线10 第5章加工余量、工序尺寸及公差13 第6章选择加工设备及工艺装备15 第7章选择切削用量、确定时间定额16 第8章填写工艺文件22 第9章铰4-Φ11孔的专用夹具设计23 9.1专用夹具的提出23 9.2夹具的定位方案23 9.3夹具的夹紧方案25 9.4导向元件的设计25 9.5夹具体的设计27 9.6装配图的设计28 总结29 参考文献30