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。 车床杠杆加工工艺规程及其钻、攻M5螺纹的夹具，是包括零件加工的工艺设计、工序设计以及专用夹具设计三部分。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：车床杠杆、加工工艺、专用夹具、切削用量、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 lathe lever processi
ng tech
nology regulatio
n a
nd the fixture for drilli
ng a
nd tappi
ng M5 threads are composed of three parts: the process desig
n of parts processi
ng, the process desig
n a
nd the 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, 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: lathe lever, processi
ng tech
nology, special fixture, cutti
ng parameters, positio
ni
ng error 目录 摘要I Abstract II 第1章计算生产纲领、确定生产类型1 1.1生产纲领1 1.2生产类型1 第2章零件分析3 2.1零件的结构分析3 2.1.1零件图分析3 2.1.2结构工艺性分析3 2.2零件的技术要求分析3 2.2.1加工表面的尺寸精度和形状精度3 2.2.2加工表面的粗糙度4 第3章工艺规程设计5 3.1定位基准的选择5 3.2制定加工工艺路线6 3.2.1各表面加工方法选择6 3.2.2加工工艺路线方案7 3.2.3确定加工工艺路线7 3.3选择加工设备及工艺装备8 3.4加工工序设计、工序尺寸计算9 3.5选择切削用量、确定时间定额10 第4章机床专用夹具设计25 4.1专用夹具的提出25 4.2夹具总体方案设计25 4.3定位元件定位误差分析和计算25 4.5夹紧机构设计和夹紧力计算26 4.5.1确定驱动机构26 4.5.2夹紧力计算26 总结28 致谢29 参考文献30