摘要 本次设计内容主要是机械加工工艺及金属切削机床等多方面知 识。 这次设计的是主动齿轮，有零件图、毛坯图、装配图各一张，机械加工工艺过程卡片和与所设计夹具对应那道工序的工序卡片各一张。首先我们要熟悉零件，题目所给的零件是主动齿轮。了解主动齿轮的作用，接下来根据零件的性质和零件图上各端面的粗糙度确定毛坯的尺寸和机械加工余量。然后我们再根据定位基准先确定精基准，后确定粗基准，最后拟定主动齿轮的工艺路线图，制定该工件的夹紧方案，画出夹具装配图，夹具体零件图。这就是我设计的基本过程。 关键词：工艺；工序；定位；夹紧；误差。 Abstract The desig
n co
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ne the fi
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nes the thick datum, fi
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ng.This is the u
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ng；error. 目录 任务书I 摘要II Abstract III 1零件分析1 1.1零件的用途1 1.2技术要求1 1.3零件的工艺分析2 1.4零件的生产类型及纲领2 2毛坯的确定2 2.1毛坯的选择2 2.2毛坯图3 2.3加工余量的确定4 2.4加工部位的技术要求4 3机械加工工艺规程设计5 3.1选择定位基准5 3.1.1粗基准的选择5 3.1.2精基准的选择5 3.2表面加工方法的确定6 3.3制定工艺路线6 3.3.1工序集中与分散7 3.3.2热处理工序7 3.3.3辅助工序7 3.4工序顺序的安排7 3.5确定工艺路线10 4确定切削用量及基本工时的确定10 4.1切削原则10 4.2键槽铣削计算11 5机床设备及工艺设备的选用11 5.1机床设备的选用12 5.2工艺设备的选用12 6夹具设计12 6.1夹具的简介12 6.2夹具的相关研究状况14 6.3夹具类型的选择15 6.4机床夹具的组成15 6.5问题的提出16 6.6主动齿轮轴夹具设计16 6.6.1定位夹具类型的选择17 6.6.2误差分析与质量评价17 6.6.3夹紧夹具设计18 6.6.4切削力的计算18 6.6.5夹紧力的计算19 6.7夹具的设计及操作的简要说明19 6.8夹具体材料的选取及附件的选取19 7体会与展望20 参考文献21