摘要

这次毕业设计我设计的课题是两级减速箱体工艺工装设计。该箱体零件结构复杂，体积小。为了提高生产效率，降低劳动强度，精镗镗轴轴承孔的组合和专用夹具设计。本设计说明书可分为三部分：
第一部分为机械加工工艺规程的编制，简要的分析了零件作用及其工艺情况对毛坯的制造、加工基准进行选择并制定工艺路线，确定机械加工余量，工序尺寸及切削用量等。
第二部分为组合镗床设计。设计的机床是单位组合机床进行单面加工。从工件的定位和夹紧可靠的方式，以确保准确性，选择卧式镗双面非刚性轴组合。并绘制了加工工序图，加工示意图和卧式单面组合镗床的尺寸联系图。
第三部分为专用夹具设计。夹具设计是本次设计的主要内容之一。我们需要对夹具进行误差分析，也要计算出夹紧力，确保可以加工。
 
关键词：箱体、加工工艺、夹具
 
  

Abstract

The Part of the process, in machining plays a very important part of the process, prepare to reasonable or unreasonable, it directly relates to the quality requirements could eventually parts, The design of fixture is big, it is the indispensable part in relation to improve the efficiency of the machining. So both in mechanical processing industry is crucial link. The graduation design, the topic is I design process and fixture enclosure reducer design. This case is complex, volume parts structure. In order to improve production efficiency and reduce labor intensity, I design a drill fixture. The design manual is divided into three parts:
The first part is divided into the machining process of the specified procedures, including process, contents and procedure, mechanical manufacturing process planning of the type and the procedure formats, introduced the principle and procedure. The choice of the locating datum, the process route in the selection of surface machining method, the method of processing, sequence arrangement has been introduced in detail.
The second part mainly introduces the process of parts processing, I choose the design is mainly for determination of casting billet, The timeliness, The preparation process route and the process of writing (card), whole process card technology in processing after inspection. In the process of calculation, and fixture design of mechanical concise manual of gb through alignment.  Under the limitation in the economic guarantee processing request.
 
Key words: box, processing technology, process,fixture
 目  录
摘要 III
Abstract IV
目  录 V
1 绪论 1
1.1 本课题的研究内容和意义 1
1.2 国内外的发展概况 1
1.3本课题应达到的要求 3
2 设计产品和零件的介绍 5
2.1 产品介绍： 5
2.2 零件介绍: 5
2.2.1 零件功用： 5
2.2.2 结构特点： 6
2.2.3 零件装配： 6
3 模型的建立 7
3.1 模型的建立： 7
4 减速器箱体的工艺分析 9
4.1 零件的工艺分析 9
5零件工艺规程设计 10
5.1 确定毛坯的制造形式 10
5.1.1毛坯选择 10
5.1.2 铸件加工余量 10
5.2 定位基准的选择 10
5.2.1 粗基准选择 10
5.2.2 精基准选择 11
5.3 加工顺序的安排 11
5.3.1 选择箱盖的加工工艺 11
5.3.2 选择下箱体的加工工艺 12
5.3.3 选择减速器箱的加工工艺 12
5.4 机械加工余量、工序尺寸和毛坯尺寸的确定 13
5.5 工时计算 15
5.5.1 箱盖加工部分工时 15
5.5.2 下箱体加工部分工时 17
5.5.3 减速器箱 19
6 专用夹具设计 24
6.1 问题的提出 24
6.2 定位基准的选择 24
6.3 定位元件的设计 24
6.4 切削力及夹紧力计算 25
6.5 定位误差分析 26
6.6 夹具的精度要求 28
6.7 夹具使用注意事项、保养及维护 29
7 结论与展望 30
7.1 结论 30
7.2 不足之处及未来展望 30
7.2.1 不足之处 30
7.2.2 未来展望 31
致谢 32
参考文献 33

机械毕业设计|论文