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。 喷油器螺母及其车Φ85外圆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：切削用量，夹紧，定位，误差。 。 Abstract This 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 ofvarious aspects of k
nowledge. I
njector
nut a
nd itsvehicle 85 outer circle are three parts, i
ncludi
ng the process desig
n of parts processi
ng, 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, 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: cutti
ng amou
nt clampi
ng positio
ni
ng error. 目录 摘要I 第1章绪论1 1.1课题背景1 1.2目的1 1.3选题的依据及意义1 1.4夹具的发展趋势1 第2章零件的分析3 2.1零件的作用3 2.2零件的技术要求分析3 第3章工艺规程设计4 3.1毛坯的制造形式4 3.2选择定位基准4 3.3制定工艺路线5 3.4机械加工余量的确定6 3.5确定切削用量及基本工时6 第4章夹具设计28 4.1问题提出28 4.2定位机构28 4.3夹紧机构29 4.4机床夹具的总体形式31 结束语32 谢辞33 参考文献34