机械5

气门摇杆轴支座零件机械加工工艺及其典型夹具设计 摘要 气门摇杆轴支座是柴油机一个重要零件，是柴油机摇杆座的结合部。本设计在气门摇杆轴支座工艺规程设计过程中，详细的分析了摇杆轴支座的加工工艺，通过工艺方案的比较与分析得到了符合技术要求的工序，形成了机械加工工艺过程卡和机械加工工序卡。并完成了铣削和车削以及钻孔夹具的设计，阐述了定位方案的选择、夹紧方案的确定、夹具体设计，运用AutoCAD完成了此典型夹具的装配图和夹具体的零件图。本设计的加工工艺合理，夹具可行、高效、省力，能满足零件的加工要求，保证其加工质量。 关键词：气门摇杆轴支座；机械加工；加工工艺；典型夹具 Beari
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nology; typical jig 目录 摘要1 Abstract 2 1绪论4 1.1题目背景和研究意义4 1.2国内外相关研究情况5 1.2.1国内夹具发展史5 1.2.2国外夹具发展史5 1.2.3国内外机床夹具发展现状6 1.3本课题研究的主要内容和拟采用的研究方案6 1.3.1课题研究主要内容6 1.3.2拟采用的研究方案7 2零件的分析8 2.1零件的作用8 2.3零件的工艺分析9 2.4零件的生产类型9 3机械加工工艺规程设计11 3.1确定毛坯的的制造形式11 3.2定位基准的选择11 3.2.1精基准的选择11 3.2.2粗基准的选择12 3.3制定机械加工工艺路线12 3.4工艺方案的比较与分析13 3.5机械加工余量、工序尺寸及毛坯尺寸的确定13 3.6选择加工设备及刀、夹、量具14 3.7确定切削用量及基本工时15 4钻2×Φ13通孔夹具设计23 4.1钻床夹具的设计特点23 4.1.1钻床夹具的主要类型23 4.1.2钻模的设计要点23 4.2问题提出24 4.3定位基准的选择24 4.4定位元件的设计24 4.5切削力及夹紧力的计算24 4.6定位误差分析25 4.7夹具设计及操作简要说明25 结论26 参考文献27 致谢28