（20 05 届）
本科生课程设计说明书
油阀座夹具设计
系 部： 机 电 工 程 系 专 业： 机械设计制造及其自动化 学 生 姓 名： 杨 智 斌 班 级： 机本八班 学号 2005011821 指导教师姓名： 张志强 职称 教 授 最终评定成绩 于洪溪 职称 副教授 唐 勇 职称 副教授 胡冠昱 职称 讲 师
2008 年 7 月
长沙学院课程设计
长沙学院本科生课程设计
油阀座夹具设计
系 （部）：机电工程系
专 业：机械设计制造及其自动化 学 号：2005011821 学生姓名：杨智斌 指导教师：张志强 教 授 于洪溪 副教授 唐 勇 副教授 胡冠昱 讲 师
2008 年 7 月
I
长沙学院课程设计
目 录
机械设计制造工艺及夹具课程设计指导书 ·································· 1 第1章 零件分析 ········································································· 3 1.1 零件的作用 ········································································································ 3 1.2 零件的工艺分析 ································································································· 3 第2章 工艺规程设计 ································································· 5 2.1 毛皮制造形式 ····································································································· 5 2.2 基面的选择 ········································································································ 5
2.3 制定工艺路线 ···································································································· 6 2.4 机械加工余量 工序尺寸及毛坯尺寸的确定 ·················································· 9 2.5 确定切削用量及基本工时 ·············································································· 10
第3章 夹具设计 ········································································ 21
3.1 问题提出 ·········································································································· 21 3.2 基准的选择 ······································································································ 21 3.3 切削力及夹紧力的计算 ·················································································· 22 3.4 定位误差的分析 ······························································································ 23 3.5 夹紧元件强度校核 ·························································································· 23 3.6 夹具设计及操作说明 ······················································································ 24 3.7 夹具的优化设计及经济分析 ·········································································· 24
第4章 设计心得体会 ···························································· 25 第5章 参考文献 ···································································· 26 第6章 附录1 机械加工工艺过程卡片 ································· 27
附录2 油阀座毛坯图 ················································· 31 附录3 油阀座零件图 ················································· 32 附录4 夹具装配图 ····················································· 33 附录5 夹具零件图 ····················································· 34
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长沙学院课程设计
机械制造工艺及夹具 课程设计指导书
一、课程设计任务书
题目：设计 油阀座 零件的机械加工工艺规程
及 钻￠2mm孔 工序的专用机床夹具。
设计要求：熟练使用计算机辅助(软件自选)，独立完成
（1） 毛坯图、零件－毛坯合图各一张(3或4号图CAD出图，手工图为2号)2
（2） 关键工序机械加工工艺规程卡片一张(4号图，CAPP出图)1 （3） 指定工序夹具装配图一张(2或3号图，CAD出图可拼接)1 （4） 夹具部分零件图1～2张(图幅自定)1
（5） 设计说明书(一份，>10页，正文小4号字，含插图) （6） 夹具3D装配效果图一张(3或4号图，可渲染)1 以上均需输出，以书面交设计资料，保留软盘待查。 原始资料：该零件图样一张；年产量为6000件。
二、课程设计指导
(一)设计的目的
本课程设计是在学完了机械制造工艺及夹具设计课程，并进行了生产实习的基础上进行的一个教学环节，它要求学生全面地综合运用本课程及其有关先修课程的理论和实践知识，进行零件加工工艺规程的设计和机床夹具的设计．其目的在于：
(1) 培养学生运用机械制造工艺学及有关课程(工程材料与热处理、机械设计、公差与技术测量等)的知识，结合生产实习中学到的实践知识，独立地分析和解决工艺问题，初步具备设计一个中等复杂程度零件的工艺规程的能力。
(2) 能根据被加工零件的技术要求，运用夹具设计的基本原理和方法，学会拟订夹具设计方案，完成夹具结构设计，提高结构设计能力。
(3) 培养学生熟悉并运用CAD、CAPP设计以及查询手册、规范、图表等技术资料的能力。
(4) 进一步培养学生识图、制图、运算和编写技术文件等基本技能。
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长沙学院课程设计
(二)设计要求与内容
本次设计要求编制一个中等复杂程度零件的机械加工工艺规程，按教师指定的任务设计
其中一道工序的专用夹具，并撰写设计说明书。学生应在教师指导下，按本指导书的规定，认真地、有计划地按时完成设计任务。必须以负责的态度对待自己所作的技术决定，数据和计算结果。注意理论与实践的结合，以期使整个设计在技术上是先进的，在经济上是合理的，在生产上是可行的。
具体内容如下：
(1)确定生产类型(一般为中批或大批生产)，对零件进行工艺分析。 (2)选择毛坯种类及制造方法，绘制毛坯图(零件－毛坯合图)； (3)运用CAPP软件拟订零件的机械加工工艺过程，选择各工序加工设备及工艺装备(刀具，夹具，量具，辅具)，确定各工序切削用量及工序尺寸。
(4)填写指定工序的工序卡片，并设计该工序的专用夹具，绘制装配总图和主要零件图1～2张
(5)撰写设计说明书。
(6)运用CAD软件绘制专用夹具的3D装配图，并制夹具效果图。
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