机械5

摘要 角形轴承箱零件的主要加工表面为孔和槽以及各表面。端面加工和直角面加工根据精度要要求可选择铣削。孔加工方法的选择比较复杂，需要考虑零件的结构特点、长径比、孔径大孝精度和粗糙度要求以及生产规模来确定镗或者钻。对于精度要求较高的孔往往还需要采用几种不同的方法顺次进行加工。 零件的加工工艺分析及夹具设计，在机械加工中占有非常重要的地位，零件工艺编制得是否合理，这直接关系到零件最终是否可以达到质量要求；夹具的设计也是不可或缺的一部分，它关系到能否提高其加工效率的问题。因此这两者在机械加工行业中是至关重要的环节。 要设计此零件的加工工艺，首先是零件的分析；其次是确定毛坯的制造形式以及制订工艺路线，翻阅《切削余量手册》，确定机械加工余量、工序尺寸、毛坯尺寸、切削用量及基本工时的确定。专用夹具的设计，首先要想好设计方案，找准定位面及各个定位元件所限制的自由度。翻阅《夹具设计手册》及《机械制造工艺手册》确定各个夹具体零件的具体尺寸。 关键词：工艺；夹具；夹紧；定位 ABSTRACT The mai
n machi
ned surfaces of the a
ngular beari
ng box parts are the holes a
nd grooves as well as the surfaces. Face machi
ni
ng a
nd right a
ngle machi
ni
ng are available accordi
ng to the accuracy requireme
nts. The choice of hole processi
ng methods is more complex,
need to co
nsider the structural characteristics of parts, aspect ratio, pore size, accuracy a
nd rough
ness requireme
nts a
nd productio
n scale a
nd other factors. For holes with high accuracy, it is ofte
n
necessary to use several differe
nt methods to process seque
ntially. Is the compo
ne
nts craft establishme
nt, holds the very importa
nt status i
n the machi
ne-fi
nishi
ng, the compo
ne
nts craft establishes reaso
nable, whether do this direct relatio
n compo
ne
nts achieve the quality requireme
nt fi
nally; Jig's desig
n is also a
n esse
ntial part, whether does it relate raises its processi
ng efficie
ncy the questio
n. Therefore this both i
n the machi
ne-fi
nishi
ng professio
n are the importa
nt li
nks. To desig
n parts of this processi
ng, the first parts of the a
nalysis; seco
ndly, to determi
ne the bla
nk forms a
nd the developme
nt of ma
nufacturi
ng process li
ne, read "Cutti
ng cushio
n ma
nual," setti
ng machi
nery allowa
nce, processes size, rough size, cutti
ng parameters a
nd the basic hours of work ide
ntified. Special fixture desig
n, the desig
n must first co
nsider good programs, pi
npoi
nt positio
ni
ng face a
nd positio
ni
ng compo
ne
nts of the various restrictio
ns of freedom. Read "Fixture Desig
n Ma
nual" a
nd "Machi
nery Ma
nufacturi
ng Tech
nology Ha
ndbook" establish specific folder size of the specific compo
ne
nts. Keywords : Process；Fixture；Sy
nchro
nizi
ng；Locatio
n 目录 摘要II ABSTRACT III 第一章绪论6 1.1理论与实际意义6 1.2国内外文献综述6 1.3课题来源及主要研究内容6 第二章零件的分析8 2.1零件的作用8 2.2技术要求分析8 2.3零件的结构工艺性分析9 2.4生产纲领的确定9 第三章毛坯的选择10 3.1铸件尺寸公差10 3.2铸件机械加工余量10 3.3毛坯图11 3.4毛坯的技术要求12 第四章工艺规程设计13 4.1选择定位基准13 4.1.1粗基准的选择13 4.1.2精基准的选择13 4.2零件表面加工方法的选择14 4.3制定工艺路线14 4.4选择加工设备与工艺装备16 4.5机械加工余量、工序尺寸的确定17 第五章确立切削用量及基本工时18 第六章钻6-Φ13mm孔夹具设计37 第七章结论38 参考文献39 致谢40