机械5

摘要 这次设计涉及机械制造工艺和机床夹具设计，金属切削机床，公差，协调和测量等诸多方面的知识。 蜗轮减速器箱体零件的工艺规划和夹具设计包括加工工艺设计，工序设计和夹具设计三部分。在过程设计中应首先了解零件的分析过程，然后设计毛坯结构，并选择好加工零件的定位基准，设计零件的工艺路线;然后对零件各个工步的工序进行尺寸计算，再通过《机械加工工艺简明速查手册》找到对应刀具及切削三要素进行查填入工艺卡片;然后设计专门的夹具，先设计出夹具体，然后再设计每一个相关的零件，如定位元件，夹紧元件，导向元件，然后再画出标准件，计算夹具定位产生的定位误差，找到指导老师帮助分析合理性夹具结构不足，进而注重未来设计的改进。 关键词：蜗轮减速器箱体工艺夹具定位夹紧误差 窗体底端 Abstract This desig
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n the process of desig
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nd choose a good locatio
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n the craft card; the
n desig
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n a specific folder, the
n desig
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n draw out the sta
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n error of fixture locatio
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nd guida
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n the ratio
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n improve the desig
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n the future. Keywords:worm reducer box process fixture positio
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ng error 目录 摘要I Abstract II 第1章绪论1 第2章工艺设计2 2.1零件的分析2 2.1.1零件的作用2 2.1.2零件的工艺分析2 2.2毛坯选择2 2.2.1毛坯的种类2 2.2.2毛坯尺寸公差与机械加工余量的确定2 2.2.3设计毛坯图3 2.3定位基准的选择4 2.4零件表面加工方法和工艺路线的确定5 2.4.1确定各表面的加工方法5 2.4.2加工顺序的安排5 2.5工艺设计7 2.5.1选择加工设备与工艺设备7 2.5.2选择夹具7 2.5.3选择刀具7 2.5.4选择量具7 2.6确定各工序切削用量8 2.7定位误差分析11 第3章镗φ40和φ35孔夹具设计13 3.1夹具设计13 3.2镗床夹具特点及适应范围13 3.3镗模的设计要点13 3.3.1镗套的结构形式13 3.3.2镗杆的结构形式13 3.3.3镗模支架和底座的设计13 3.4定位基准的选择14 3.5夹紧机构的设计14 3.5.1夹紧装置的基本要求14 3.6夹具装配图14 总结17 致谢19 参考文献20