机械工艺夹具毕业设计27CA6140车床法兰盘工艺规程及夹具设计说明书

本科毕业设计论文题目CA6140车床法兰盘的工艺规程和夹具设计

专业名称机械设计制造及其自动化

学生姓名

指导教师

毕业时间 1

毕业任务书

一、题目

CA6140车床法兰盘的工艺规程和夹具设计

二、指导思想和目的要求

毕业设计（论文）是培养学生自学能力、综合应用能力、独立工作能力的重要教学实践环节。

在毕业设计中，学生应独立承担一部分比较完整的工程技术设计任务。要求学生发挥主观能动性，积极性和创造性，在毕业设计中着重培养独立工作能力和分析解决问题的能力，严谨踏实的工作作风，理论联系实际，以严谨认真的科学态度，进行有创造性的工作，认真、按时完成任务。

三、主要技术指标

1．零件图一张；

2．毛坯图一张；

3．工艺规程一本；

4．工艺装备（夹具1-2套）；

5．说明书一份

四、进度和要求

1．分析并绘制零件图2周

2．绘制毛坯图1周

3．设计工艺路线及编制工艺规程5周

4．设计工艺装备4周

5．编写说明书（论文）2周

五、主要参考书及参考资料

[1] 王先逵编著.机械制造工艺学[M].北京：清华大学出版社，1989

[2] 杨叔子.机械加工工艺师手册[M].北京：机械工业出版社，2001

[3] 朱耀祥，蒲林祥.现代夹具手册[M].北京：机械工业出版社，2010

摘要

本次毕业设计的题目是CA6140车床法兰盘的工艺规程和夹具设计，主要内容如下：

首先，对零件进行分析，主要是零件作用的分析和工艺性分析，通过零件分析可以了解零件的基本情况，而工艺分析可以知道零件的加工表面和加工要求。根据零件图提出的加工要求，确定毛坯的制造形式和尺寸。

其次，进行基面的选择，确定加工过程中的粗基准和精基准。根据选好的基准，制订工艺路线，通常制订两种以上的工艺路线，通过工艺方案的比较与分析，再选择可以使零件的几何形状、尺寸精度及位置精度等技术要求得到合理的保证的一种较佳工序路线。

然后，根据已经选定的工序路线，确定每一步的切削用量及基本工时，并选择合适的机床和刀具和量具。

最后，设计钻法兰盘4-Ø9孔的钻床夹具。设计钻床夹具，首先要仔细分析被加工零件的技术要求，运用夹具设计的基本原理和方法，拟定夹具设计方案；在满足加工精度的条件下，合理的进行安装、定位、夹紧；在完成夹具草图后，进一步考虑零件间的连接关系和螺钉、螺母、定位销等的固定方式，设计合理的结构实现各零部件间的相对运动；根据各零件的使用要求，选择相应的材料。

完成钻床夹具的所有设计后，用AutoCAD进行二维图形的绘制，首先画装配图，然后从装配图上拆画零件图，标注相关尺寸及技术要求；再用CATIA画出三维模型图，最后进行论文的撰写、整理、修改完成该毕业设计。

关键词：机械，法兰盘，加工工艺，夹具设计

ABSTRACT

The subject of this graduation project is that CA6140 lathe ring flange processing technology rules and special-purpose jig of a certain process are designed, the main content is as follows:

First of all, analyse , it is mainly analysis of the function of the part and craft analysis to the part , through part analyse can find out about basic situation of part, and craft analyse may know the processing surface of the part and is it require to process. The processing demand put forward according to the part picture, confirm the manufacture form. of the blank and sureness of the size.

The second step, carry on the choice the base , confirm thick datum and precise datum in the processing course. According to the datum chosen , make the craft route , usually make the craft route of more than two kinds, with analysing through the comparison of the craft scheme, and then choosing be able to make such specification requirements as the precision of geometry form. size of the part and precision of position ,etc. get a kind of process of the rational assurance s.

The third step, according to the already selected process route, confirm for every steps of cutting consumption and basic man-hour , choose suitable lathe and cutter. To rough machining , will check the power of the lathe .

Finally , design the jig getting into the hole of the ring flange. Designed drilling fixture, the first careful analysis is the technical requirements for processing components, fixture design using the basic principles and methods.Prepared the fixture design scheme ;Meet the conditions of precision ,then reasonable installation, positioning, clamping;After the completion of draft fixture, and further consider the connection relation between parts and screws, nuts, pins and other fixed means,designing the reasonable structure to achieve relative motion between the various components;Requirements of the various components, select the appropriate materials.

Completion of all drilling fixture design, using the AutoCAD drawing two-dimensional graphics,first draw assembly drawing, and then removed from the part drawing on the painting Parts,marking the related to size and technical requirements,finally, write a thesis, organize, edit, complete the graduation project.

KEY WORDS：machine, flange, process the craft, the tongs design