机械5

螺母机械加工工艺 与切槽及钻侧面夹具设计 摘要 在机床上加工工件时，定位和夹紧的全过程称为“安装”。在机床上用来完成工件安装任务的重要工艺装备，就是各类夹具中应用最为广泛的“机床夹具”。 机床夹具的种类很多，其中，使用范围最广的通用夹具，规格尺寸多已标准化，并且有专业的工厂进行生产。而广泛用于批量生产，专为某工件加工工序服务的专用夹具，则需要各制造厂根据工件加工工艺自行设计制造。本设计的主要内容是设计铣床夹具 零件上往往都有各种不同用途和不同精度的孔需要加工。在机械加工中，孔的加工量所占比例较大，其中钻头、扩孔钻、铰刀等定尺寸刀具加工占相当多数。这时，除了要保证孔的尺寸精度外，还要达到孔的位置精度要求。在单件小批量生产中，用划线后找正孔轴线位置方法加工。在批量生产中一般都采用夹具。 关键词通用夹具专用夹具夹具螺母 Abstract I
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neral fixture Special jig fixture support body 目录 摘要I Abstract II 第1章绪论5 1.1机床夹具概述5 1.1.1机床夹具5 1.1.2机床夹具的功能5 1.1.3机床夹具在机械加工中的作用5 1.2机床夹具的发展趋势6 1.2.1机床夹具的现状6 1.2.2现代机床夹具的发展方向6 第2章工艺规程设计7 2.1零件的分析7 2.1.1零件的作用7 2.1.2零件的工艺分析8 2.2毛坏的选择8 2.3工艺路线的拟定8 2.3.1孔和平面加工分析8 2.3.2定位基准的选择9 2.3.3拟定工艺路线9 2.4加工余量的确定10 2.4.1左、右两侧面的加工余量10 第3章切削用量及工时的确定11 3.1粗铣右侧面11 3.1.1加工条件11 3.1.2计算切削用量11 3.1.3计算切削工时12 3.2粗铣左侧面13 3.2.1加工条件13 3.2.2计算切削用量13 3.2.3计算切削工时14 3.3精铣右侧面14 3.3.1加工条件14 3.3.2计算切削用量15 3.3.3计算切削工时16 3.4精铣左侧面16 3.4.1加工条件16 3.4.2计算切削用量17 3.4.3计算切削工时18 3.4.4铰孔Φ20 18 第4章专用夹具设计19 4.1车床夹具19 4.1.1问题的提出19 4.1.2夹具设计19 4.2.2夹具设计21 第5章结论24 致谢25 参考文献26