毕业设计论文任务书

毕业设计(论文)任务书学生姓名专业班级指导教师工作单位机械制造及其自动化设计(论文)题目:微型电机轴轴端扁部加工夹具设计——弹性件夹紧夹具设计设计（论文）主要内容：微型电机轴轴端扁部加工夹具设计——夹具方案分析与选择、总体设计及主要零件设计要求完成的主要任务:1.夹具方案分析、开题报告；2.夹具总体设计；3.主要零部件设计；4.外文翻译；5.说明书。必读参考资料：1.夹具设计手册2.夹具设计图册3.机械设计手册4.机械制造工艺设计简明手册5.组合机床设计图册6.机械制造工艺及专用夹具设计制导7.机床夹具零件及部件国家标准8.机械制造工艺设计手册指导教师签名：教研室主任签名：盖章毕业设计(论文)开题报告题目微型电机轴轴端扁部加工夹具设计——弹性件夹紧夹具设计1．目的及意义（含国内外的研究现状分析）：我国微电机行业创建于20世纪50年代末期，从为满足国防武器装备需要开始，经历了仿制、自行设计和研究开发的阶段，至今已有40余年的发展历史，已形成产品开发、规模化生产和关键零部件、关键材料、专用制造设备、测试仪器配套的完整的工业体系。自20世纪80年代以来，微电机的国内需求在不断增长。我国已引进50余条生产线，实现25个大类、60个系列、400个品种、2000个规格微特电机大批量、规模化生产。主要产品是有刷永磁直流电动机、小功率交流电动机、交直流串激电动机、罩极电动机、步进电动机、振动电机(手机用)等。1999年我国微电机产量约30亿台，其中民营和国企的产量约2.5亿台，独资企业的产量约12亿台，香港地区的产量约14亿台(德昌公司12亿台)，台湾地区的产量约1.8亿台。2000年生产量约39亿台，占全球总产量的60％。2000年世界微电机市场约65亿台，我国出口27.26亿台，占国际市场约42％的份额，其中玩具电机32151.1万台，37.5W的微特电机238239.6万台，37.5W的交直两用电机1970.6万台，750W的直流电动机、发电机237.7万台。据统计，80％为日本、我国香港和台湾地区在内地的投资企业所生产出口的微电机。2001年出口创汇在5000万美元的企业有6家：青岛三美电机有限公司14134万美元，天津三美电机有限公司12450万美元，珠海三美电机有限公司10803万美元，东芝华强三洋马达有限公司9955万美元，万宝至马达大连有限公司9690万美元，珠海松下马达有限公司8082万美元，三协精机(福建)有限公司7271万美元。技术含量高的微电机，如精密无刷电动机、高速同步电动机、高精度步进电动机、片状绕组无刷电动机、高性能伺服电动机以及新原理新结构超声波电动机国内尚未形成商品化或批量生产能力。所以国内对高精密微特电机还依赖进口。据海关统计，1995~2000年年均用汇增长26.9％，2001年虽然增加4.81％，还达11.97亿美元。据统计，我国微电机生产及配套厂家在1000家以上，从业人员超过10万人，工业总产值超过100亿元。微电机行业已成为国民经济和国防现代化建设中不可缺少的一个基础产品工业。日本是世界微电机的最大制造国，1996年其产量达23亿台，出口量达16亿台，2000年其产量降至17亿台，产值也下降至673.3亿日元，约为10年前日本微电机产值的一半。日本Mabuchi马达公司是全球最大的微电机制造商，它制造了世界DC电机市场产品一半以上，在我国大陆和台湾省、马来西亚、越南等地均设有生产厂，该公司在全球各地的DC电机综合生产能力已达15亿台。由于日本在磁性材料、电子控制和生产工艺上的领先地位，从而使其不仅在微电机的生产方面居世界霸主地位，在技术领域也雄居世界前沿，其微电机产品具有大转矩、小尺寸、高控制精度、低功耗、长寿命和低成本的竞争优势。2．基本内容和技术方案：基本内容：针对微型电机轴轴端扁部加工制订夹具方案，并对夹具的方案进行分析与选择，确定方案后对夹具进行总体设计及主要零件设计，其中包括：对零件进行工艺分析；选择毛胚的制造方式；制订零件的机械加工工艺路线；工艺装备设计。最后需完成以下任务：①.夹具方案分析、开题报告；②.夹具总体设计；③.主要零部件设计；④.外文翻译；⑤.说明书。技术方案：针对零件的形状、大小、材料、硬度、刚性、加工部位的结构特点、加工精度、表面粗糙度以及定位、夹紧方法、工艺过程、所采用的道具及切削用量、现场环境和条件、生产率要求等确定设计方案，选择定位元件计算定位误差，计算所需夹紧力、设计夹紧机构，画夹具装配图。采用弹性件夹紧夹具，两相互垂直平面进行径向定位，挡板进行轴向定位。由于微电机轴的直径为2.58mm，故采用50件同时加工的方式。3．进度安排：第3-4周：查阅有关微电机轴轴端扁部的加工资料，初步了解微电机轴轴端扁部的加工方法，并编写开题报告。第5-7周：外文翻译，并确定夹具的方案。第8-13周：对夹具进行设计，完成夹具图纸的绘制。第14周：编写设计说明书。第15周：答辩.4．指导老师意见：指导教师签名：年月日注：1.开题报告应根据教师下发的毕业设计（论文）任务书，在教师的指导下由学生独立撰写，在毕业设计开始后三周内完成；2．设计的目的及意义至少800字，基本内容和技术方案至少400字；3．指导教师意见应从选题的理论或实际价值出发，阐述学生利用的知识、原理、建立的模型正确与否、学生的论证充分否、学生能否完成课题，达到预期的目标。郑重声明本人郑重声明：所呈交的论文是本人在导师的指导下独立进行研究所取得的研究成果。除了文中特别加以标注引用的内容外，本论文不包括任何其他个人或集体已经发表或撰写的成果作品。本人完全意识到本声明的法律后果由本人承担。本人签名：日期：目录摘要························································································································0ABSTRACT····················································································································11绪论···························································································································21.1微电机的发展概述·································································································21.2夹具的发展趋势····································································································31.3本课题的研究内容·································································································42夹具方案分析与选择······································································································52.1径向定位分析·······································································································52.1.1V形块定位误差产生原因的分析·······································································52.1.2V形块定位误差的计算···················································································62.1.3两垂直平面定位误差分析···············································································92.2轴向定位分析·····································································································102.3夹紧方案分析·····································································································102.4装夹方案分析·····································································································123夹具设计···················································································································123.1定位基准的选择··································································································123.2夹紧力的确定·····································································································133.3定位误差分析·····································································································133.3.1采用两相互垂直平面径向定位的定位误差分析··················································133.3.2采用挡板轴向定位的定位误差分析·································································143.3.3采用一面两销定位误差分析··········································································143.3.4夹具设计及操作的简要说明··········································································154主要零件设计·············································································································154.1夹具体设计········································································································154.2塑料板设计··················································