机械5

外齿轮的滚齿夹具设计及加工工艺规程装备 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。 外齿轮的加工工艺规程及其滚齿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 co
nte
nt has i
nvolved the machi
ne ma
nufacture craft a
nd the e
ngi
ne bed jig desig
n, the metal-cutti
ng machi
ne tool, the commo
n differe
nce coordi
natio
n a
nd the survey a
nd so o
n thevarious k
nowledge. The reductio
n gear box body compo
ne
nts tech
nological process a
nd its the processi
ng hole jig desig
n is i
ncludes the compo
ne
nts processi
ng the tech
nological desig
n, theworki
ng procedure desig
n aswell as the u
nit clamp desig
n three parts. Must first carry o
n the a
nalysis i
n the tech
nological desig
n to the compo
ne
nts, u
nderstood the compo
ne
nts the craft redesig
ns the semi fi
nished materials the structure, a
nd chooses the good compo
ne
nts the processi
ng datum, desig
ns the compo
ne
nts the craft route; After that is carryi
ng o
n the size computatio
n to a compo
ne
nts each labor step ofworki
ng procedure, the key is decides eachworki
ng procedure the craft equipme
nt a
nd the cutti
ng specificatio
ns; The
n carries o
n the u
nit clamp the desig
n, the choice desig
ns the jig each compositio
n part, like locates the part, clamps the part, guides the part, to clamp co
ncrete a
nd the e
ngi
ne bed co
n
nectio
n part aswell as other parts; Positio
n errorwhich calculates the jig locateswhe
n produces, a
nalyzes the jig structure the ratio
nality a
nd the deficie
ncy, a
ndwill desig
n i
n later pays atte
ntio
n to the improveme
nt. Keywords The craft, theworki
ng procedure, the cutti
ng specificatio
ns, clamp, the localizatio
n, the error 目录 摘要1 ABSTRCT 2 前言1 1绪论2 1.1机床夹具的概念2 1.1.1夹具的现状几生产对其提出新的要求2 1.1.2现代夹具的发展发向3 1.2机床夹具的组成4 1.2.1机床夹具的基本组成部分： 4 1.2.2机床夹具的其他特殊元件或装置5 1.3机床夹具的分类5 1.3.1机床夹具的分类如下6 1.3.2机床夹具的分类7 1.4机床夹具在机械加工中的作用9 1.4.1机床夹具9 1.4.2机床夹具的功能9 2零件的分析13 2.1零件的作用13 2.2零件的工艺分析13 3.工艺规程设计15 3.1确定毛坯的制造形式15 3.2基面的选择15 3.3工艺路线16 3.4机械加工余量、工序尺寸及毛坯尺寸的确定18 3.5确定切削用量及基本工时19 4夹具设计23 4.1问题的提出23 4.2工件的装夹方式23 4.3定位基准的选择24 4.4工件的定位25 4.4.1工件定位的基本原理25 4.4.2常见定位方式及定位元件26 4.5切削力和夹紧力计算27 4.5.1夹紧装置的组成及基本要求28 4.5.2夹紧力的确定28 4.6定位误差分析31 4.7夹紧误差分析和计算32 4.8夹具设计及操作说明33 总结34 致谢36 参考文献37