机械5

连接壳体的加工工艺及镗Φ30孔夹具设计.doc 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。 连接壳体的加工工艺规程及其镗Φ30孔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：工艺、工序、切削用量、夹紧、定位、误差。 ABSTRCT 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. Processi
ng procedure for co
n
necti
ng shell a
nd fixture desig
n for bori
ng hole 30 are three parts: process desig
n for parts processi
ng, 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, 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, we ca
n choose the processi
ng be
nchmark of the parts. The desig
n of the special fixture is carried out, a
nd the compo
ne
nts of the fixture are selected, such as positio
ni
ng eleme
nts, clampi
ng eleme
nts, guidi
ng eleme
nts, co
n
necti
ng parts betwee
n fixture body a
nd machi
ne tool, a
nd other compo
ne
nts. The positio
ni
ng errors caused by fixture positio
ni
ng are calculated, the ratio
nality a
nd shortcomi
ngs of fixture structure are a
nalyzed, a
nd the desig
n
notes are give
n i
n the future. I
nte
ntio
n to improve. Key words: process, process, cutti
ng parameters, clampi
ng, positio
ni
ng, error. 目录 序言…………………………………………………………………1 一.零件分析……………………………………………………2 1.1零件作用………………………………………………2 1.2零件的工艺分析…………………………………………2 二.工艺规程设计…………………………………………………3 2.1确定毛坯的制造形式……………………………………3 2.2基面的选择………………………………………………5 2.3制定工艺路线……………………………………………8 2.4机械加工余量、工序尺寸及毛坯尺寸的确定…………11 2.5确定切削用量及基本工时………………………………14 三夹具设计……………………………………………………17 3.1问题的提出………………………………………………17 3.2定位基准的选择…………………………………………18 3.3切削力及夹紧力计算……………………………………19 3.4定位误差分析……………………………………………20 3.5夹具设计及操作简要说明………………………………21 总结………………………………………………………………22 致谢………………………………………………………………24 参考文献…………………………………………………………25