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
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ngular beari
ng box parts are the holes a
nd grooves aswell as the surfaces. Face machi
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ng to the accuracy requireme
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ng methods is more complex,
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nsider the structural characteristics of parts, aspect ratio, pore size, accuracy a
nd rough
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nd other factors. For holeswith high accuracy, it is ofte
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necessary to use several differe
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nable,whether do this direct relatio
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nts achieve the quality requireme
nt fi
nally; Jig's desig
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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
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nalysis; seco
ndly, to determi
ne the bla
nk forms a
nd the developme
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nufacturi
ng process li
ne, read"Cutti
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ng parameters a
nd the basic hours ofwork ide
ntified. Special fixture desig
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n must first co
nsider good programs, pi
npoi
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nd"Machi
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n 目录 摘要II ABSTRACT III 第一章绪论1 1.1理论与实际意义1 1.2国内外文献综述1 1.3课题来源及主要研究内容1 第二章零件的分析3 2.1零件的作用3 2.2技术要求分析3 2.3零件的结构工艺性分析4 2.4生产纲领的确定4 第三章毛坯的选择5 3.1铸件尺寸公差5 3.2铸件机械加工余量5 3.3毛坯图6 3.4毛坯的技术要求7 第四章工艺规程设计8 4.1选择定位基准8 4.1.1粗基准的选择8 4.1.2精基准的选择8 4.2零件表面加工方法的选择9 4.3制定工艺路线9 4.4选择加工设备与工艺装备10 4.5机械加工余量、工序尺寸的确定12 第五章确立切削用量及基本工时14 第六章专用夹具设计33 6.1夹具设计任务33 6.2定位基准的选择33 6.3定位误差的分析33 6.4切削力及夹紧力的计算34 6.5夹紧装置的设计35 6.6导向方案及导向元件的选择和设计36 6.7夹具设计及操作的简要说明36 6.8本章小结37 第七章结论38 参考文献39 致谢40