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。主轴加工工艺规程及其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。 Abstract 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 procedurethe 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 thee
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II Abstract III 1零件的工艺分析及生产类型的确定1 1.1零件的用途1 1.2零件的工艺分析2 1.2.1主轴零件需要加工部位的技术要求2 1.2.2审核主轴的工艺性2 1.2.3确定主轴的生产类型2 2工艺规程设计3 2.1选择毛坯3 2.2定位基准的选择3 2.2.1粗基准的选择3 2.2.2精基准的选择3 2.2.3基准的转换3 2.3零件表面加工方法的选择4 2.4制订工艺路线4 2.4.1加工阶段的划分4 2.4.2制定的主轴的工艺路线5 2.5确定毛坯尺寸，设计毛坯图5 2.7确定切削用量及基本工时9 2.7.1粗车M16-6g外圆9 2.7.2粗车Φ 26外圆10 2.7.3粗车Φ 40外圆11 3夹具设计12 3.1问题的提出12 3.2定位基准的选择12 3.3切削力及夹紧力计算13 3.3.1.夹紧力方向的确定13 3.3.2.夹紧力作用点的选择13 3.3.3.夹紧力大小的估算13 3.4.定位误差分析15 3.5夹具设计及操作简要说明15 4总结16 参考文献18