齿轮箱工艺设计及加工过程仿真(数控编程)

齿轮箱工艺设计及加工过程仿真（数控编程）

摘要

犁刀变速齿轮箱体是旋耕机的一个主要零件。旋耕机通过该零件的安装平面与手扶拖拉机变速箱的后部相连，用两圆柱销定位，四个螺栓固定，实现旋耕机的正确联接。犁刀变速齿轮箱体的质量直接影响到机器的性能。本次设计先进行了犁刀变速齿轮箱体的零件分析，通过对参考文献进行的分析与研究，阐述了工艺规程和制造技术等相关内容；在技术路线中，论述箱体的加工工艺，机械加工余量，加工顺序的安排和基本工时计算。

关键词 ：工艺规程；犁刀变速齿轮箱体；定位基准；加工余量

Abstract

The coulter gear casing of changing speed is a major element of the machine of rotary tillage. The machine of rotary tillage is linked through the rear of the gearbox of walking tractor and the installation plane of this element, using two cylinders to sell location and 4

bolts to fix in order to realize the correct coupling of the machine of rotary tillage. The quality of the coulter gear casing of changing speed put a direct influence on the performance of machine. This design goes on the element analysis of the coulter gear casing of changing speed first, through the research and analysis of the bibliographical reference, then it have elaborated procedure and made the related contents such as technology; In technical route, it discussed machining surplus and the processing technology of casing, the process of the sequential arrangement and the calculation of the basic man-hour.

Keywords: Procedure；the coulter gear casing of changing speed；location standard ； mental allowance

目录

摘要 .......................................................................................................................................... Ⅰ

Abstract ........................................................................................................................... Ⅱ 目录 ................................................................................................................................. Ⅰ

第一章 绪论 ................................................................................................................... 1

1．1 箱体零件的主要技术要求 ..................................................................................... 1

1．1．1 箱体类零件的结构特点 ............................................................................ 1

1．1．2 箱体类零件的结构特点 ............................................................................ 2

1．1．3 箱体类零件的材料和毛坯 ........................................................................ 2

1．2箱体类零件的加工工艺分析 .................................................................................... 2

1．2．1工艺路线的安排 ........................................................................................... 2

1．2．2 定位基准的选择 ........................................................................................ 3

1．2．3 主要表面的加工 ........................................................................................ 4

1.2.3.1 箱体的平面加工 ........................................................................................... 4

1.2.3.2 孔系加工 ..................................................................................................... 4

1．3 夹具的组成 ............................................................................................................. 5

1．4 钻模的分类与设计 ................................................................................................. 6

第二章 零件的功用与结构分析 ................................................................................. 8

2.1 零件的功用 ................................................................................................................ 8

2.2 零件的工艺分析 ........................................................................................................ 8

2．2．1零件主要加工表面尺寸 ............................................................................. 10

2．2．2零件的材质。热处理及工艺分析 ............................................................. 10

第三章 工艺规程设计 ................................................................................................... 11

3．1 确定毛坯的制造形式 ............................................................................................. 11

3．2基面的选择 .............................................................................................................. 11

3．2．1 精基准的选择 ............................................................................................ 11

3．2．2 粗基准的选择 ............................................................................................ 11

3．2．3 定位夹紧方案的制定 ................................................................................ 11

3．3工艺过程的划分 ...................................................................................................... 12

3．4工艺路程的制定 ...................................................................................................... 12

3．5 工艺方案的分析与比较 ..................................................................................... 14

3．5．1 工艺规程选择的基本因素 .................................................................... 14

3．5．2 工艺规程的基本分析 ............................................................................ 15

第四章 确定切削用量及工序设计 ........................................................................... 17

4．1 机械加工余量，工序尺寸及毛坯尺寸的确定 ..................................................... 17

4．2 确定切削用量及工序计算 ..................................................................................... 18

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