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。 十字沟槽零件的工艺设计、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：切削用量;夹紧;定位;误差。 Abstract The desig
n i
nvolves the mecha
nical ma
nufacturi
ng process a
nd machi
ne tool fixture desig
n, metal cutti
ng machi
ne tools, tolera
nce a
nd measureme
nt, a
nd other aspects of k
nowledge. The processi
ng regulatio
ns for the co
n
nectio
n parts of hydraulic pipe fitti
ngs a
nd the three parts of process desig
n, process desig
n a
nd special fixture desig
n for drilli
ng 3 holes a
nd expa
nsio
n a
nd hi
nge 10 are i
ntroduced. 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 the worki
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 the various worki
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 parts with the machi
ne tool a
nd the other parts. The positio
ni
ng error is calculated whe
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. Key words: Cutti
ng dosage;clamp;Locatio
n; error. 目录 摘要I Abstract II 第一章绪论1 1.1前言1 1.2夹具设计中的特点1 1.3夹具设计需保证的条件1 1.4夹具的发展趋势1 1.5研究方法及技术路线2 第二章零件的分析4 2.1零件的作用4 2.2零件表面组成分析4 2.3零件的加工要求分析4 2.4零件的形位公差分析5 第三章工艺规程设计6 3.1确定毛坯的制造形式6 3.2基面的选择6 3.3制定工艺路线7 3.4确定各工序的加工余量8 3.5确定切削用量及基本工时10 第四章钻床夹具设计33 4.1问题的提出33 4.2定位基准的选择33 4.3定位元件的选择33 4.4切削力及夹紧力计算34 4.5定位误差分析34 4.6夹具设计及操作简要说明35 结论36 小结与致谢37 参考文献38