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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nd grooves aswell as the surfaces. Face machi
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nd rough
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nally; Jig's desig
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n. Therefore this both i
n the machi
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nks. To desig
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nalysis; seco
ndly, to determi
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nufacturi
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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 目录 摘要i ABSTRACT ii 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- 8- 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- 11- 第五章确立切削用量及基本工时- 13- 第六章专用夹具设计- 32- 6.1钻2-φ25的孔夹具设计- 32- 6.2夹具设计任务- 32- 6.3定位基准的选择- 32- 6.4定位误差的分析- 32- 6.5切削力及夹紧力的计算- 33- 6.6夹紧装置的设计- 34- 6.7导向方案及导向元件的选择和设计- 35- 6.8夹具设计及操作的简要说明- 35- 6.9本章小结- 35- 第七章结论- 37- 参考文献- 38- 致谢- 39-