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。 连杆的工艺设计和铣连杆宽10槽的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：连杆；工艺；夹具设计；切削用量；夹紧；定位；误差 Abstract This desig
n i
nvolves the k
nowledge of machi
ne ma
nufacturi
ng tech
nology a
nd fixture desig
n, metal cutti
ng machi
ne tools, tolera
nce matchi
ng a
nd measureme
nt, etc. The process desig
n of co
n
necti
ng rod a
nd the fixture desig
n of milli
ng co
n
necti
ng rodwith 10 grooves are composed of three parts: the process desig
n of parts processi
ng, the process desig
n a
nd the desig
n of special fixture. 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, a
nd select the processi
ng be
nchmark of the parts, the
n desig
n the process route of the parts; the
n calculate the size of the parts i
n each step, the key is to determi
ne the process equipme
nt a
nd cutti
ng parameters of each step; a
nd the
n desig
n the special fixture, select a
nd desig
n the fixture. Each compo
ne
nt, such as positio
ni
ng eleme
nt, clampi
ng eleme
nt, guidi
ng eleme
nt, fixture body a
nd machi
ne tool co
n
necti
ng parts a
nd other compo
ne
nts, calculates the positio
ni
ng error of fixture positio
ni
ng, a
nalyses the ratio
nality a
nd shortcomi
ngs of fixture structure, a
nd pays atte
ntio
n to improveme
nt i
n future desig
n. Keywords: co
n
necti
ng rod; process; fixture desig
n; cutti
ng parameters; clampi
ng; positio
ni
ng; error 目录 摘要I Abstract II 前言1 第1章工艺规程制定2 1.1机械加工工艺规程制订2 1.2机械加工工艺规程的组成2 1.3制订机械加工工艺规程的原始资料2 第2章零件的分析3 2.1零件的作用3 2.2零件的工艺分析3 第3章工艺规程设计4 3.1确定毛坯的制造形式4 3.2基面的选择4 3.3制订工艺路线5 3.4机械加工余量的确定6 3.5选择加工设备及工艺装备6 3.6确定切削用量及基本工时7 第4章夹具设计24 4.1问题的提出24 4.2定位基准的选择24 4.3定位元件的设计24 4.4定位误差分析25 4.5切削力的计算与夹紧力分析25 4.6夹具设计及操作简要说明26 谢辞27 参考文献28