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。 总泵缸体工艺规程及其钻透孔Φ0.7、沉孔Φ3.5和Φ3.5通孔的工装夹具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：工艺、工序、切削用量、夹紧、定位、误差。 Abstract This desig
n i
nvolves ma
ny aspects of k
nowledge, such as mecha
nical ma
nufacturi
ng process, machi
ne tool fixture desig
n, metal cutti
ng machi
ne tool, tolera
nce matchi
ng a
nd measureme
nt. Master cyli
nder block process specificatio
n a
nd drilli
ng through hole Φ 0.7 cou
nterbore Φ 3.5 a
nd Φ 3.5 the tooli
ng fixture desig
n of through hole i
ncludes three parts: process desig
n, process desig
n a
nd special fixture desig
n. I
n the process desig
n, we should first a
nalyze the parts, u
ndersta
nd the process of the parts, the
n desig
n the structure of the bla
nk, select the machi
ni
ng be
nchmark of the parts, a
nd desig
n the process route of the parts; The
n, the size of each step of the part is calculated. The key is to determi
ne the process equipme
nt a
nd cutti
ng parameters of each process; The
n the special fixture is desig
ned, a
nd each compo
ne
nt of the fixture is selected a
nd desig
ned, such as positio
ni
ng eleme
nt, clampi
ng eleme
nt, guidi
ng eleme
nt, co
n
necti
ng part betwee
n clamp a
nd machi
ne tool a
nd other parts; Calculate the positio
ni
ng error caused by fixture positio
ni
ng, a
nalyze the ratio
nality a
nd shortcomi
ngs of fixture structure, a
nd pay atte
ntio
n to improveme
nt i
n future desig
n. Key words: process, process, cutti
ng parameters, clampi
ng, positio
ni
ng, error. 目录 摘要I Abstract II 第一章绪论1 1．1引言1 1．2机械加工工艺规程的作用1 1．3研究方法及技术路线2 1．4课题背景及发展趋势3 第2章工艺规程设计4 2．1毛坯的制造形式4 2. 2零件分析4 2．3基面的选择4 2.3.1粗基准的选择原则4 2．3．2精基准选择的原则5 2．4制定工艺路线5 2．6确定切削用量及基本工时7 第3章钻透孔Φ0.7、锪沉孔Φ3.5、钻Φ3.5通孔的夹具设计21 3.1：问题的提出21 3.2：定位基准的选择21 3.3切削力及夹紧力计算21 3.4定位误差分析21 3.5钻套的设计22 3.6夹具截图22 总结24 致谢25 参考文献26