端盖夹具设计word版

课 程 设 计 题 目：设计轴承盖零件加工工艺规程及加工

摘要

本文是有关轴承座工艺步骤的说明和机床夹具设计方法的具体阐述。工艺设计是在学习机械制造技术工艺学及机床夹具设计后，在生产实习的基础上，综合运用所学相关知识对零件进行加工工艺规程的设计和机床夹具的设计，根据零件加工要求制定出可行的工艺路线和合理的夹具方案，以确保零件的加工质量。

据资料所示，轴承座是变速器中的主要外部零件，其主要作用是实现变速器中传动作用和正常工作的。在设计轴承座机械加工工艺过程时要通过查表法准确的确定各表面的总余量及余量公差，合理选择机床加工设备以及相应的加工刀具，进给量，切削速度、功率，扭矩等用来提高加工精度，保证其加工质量。

关键词 机械加工、工艺规程、专用夹具、轴承座

This is the description of the process steps of the bearing and machine tool fixture design methods specifically addressed. Process design is to study the mechanical manufacturing technology and machine tool fixture design, production internship on the basis of the integrated use of the knowledge of the part design process planning and design of jigs and fixtures, parts processing requirements to develop a feasible the process route and a reasonable fixture program to ensure that the processing quality of the parts.

According to the data shown in bearing the main external parts of the transmission, its main role is the role of transmission in the transmission and normal work. Process design bearing machining process by look-up table method accurately determine the total margin and the margin of tolerance of each surface, a reasonable choice of machining equipment and processing tool, feed rate, cutting speed, power, torque used to improve processing accuracy, and ensure the quality of its processing. Keywords machining, process planning, special fixtures, bearing

目录

1 轴承座的工艺分析及生产类型的确定 ....................................................................................... 6

1.1 轴承座的用途 .................................................................................................................... 6 1.2轴承座的技术要求 ............................................................................................................. 7 1.3轴承座工艺分析 ................................................................................................................. 7 2 确定毛坯 、绘制毛坯简图 ......................................................................................................... 8

2.1选择毛坯 ............................................................................................................................. 8 2.2确定毛坯的尺寸公差和机械加工余量 ............................................................................. 8 2.3绘制轴承座毛胚的铸造简图 ............................................................................................. 9 3、拟定轴承座工艺路线 ................................................................................................................. 9

3.1、定位基准的选择 .............................................................................................................. 9

3.1.1 精基准的选择 ....................................................................................................... 10 3.1.2 粗基准的选择 ....................................................................................................... 10 3.2各面、孔加工方法的确定 ............................................................................................... 10 3.3加工阶段的划分 ............................................................................................................... 11 3.4工序的集中与分散 ........................................................................................................... 11 3.5工序顺序的安排 ............................................................................................................... 11

3.51机械加工工序 ......................................................................................................... 11 3.52热处理工序 ............................................................................................................. 11 3.53辅助工序 ................................................................................................................. 11 3.6确定加工路线 ................................................................................................................... 12 4 机床设备及工艺装备的选用 ..................................................................................................... 13

4.1机床设备的选用 ............................................................................................................... 13 4.2工艺装备的选用 ............................................................................................................... 13 5 加工余量、工序尺寸和公差的确定 ......................................................................................... 13 6 切削用量、时间定额的计算 ..................................................................................................... 13

6.1切削用量的计算 ............................................................................................................... 13

6.11 钻孔工步 ................................................................................................................ 14 6.2时间定额的计算 ............................................................................................................... 15

6.21基本时间

tj的计算 ............................................................................................... 15

6.22辅助时间

ttf的计算 ................................................................................................ 16

6.23其他时间的计算 ..................................................................................................... 16 6.24单件时间

dj的计算 ............................................................................................... 17

7 夹具设计..................................................................................................................................... 17

7.1问题的提出 ....................................................................................................................... 17 7.2夹具设计 ........................................................................................................................... 17

7.21 定位方案 ................................................................................................................ 17 7.22 夹紧机构 ................................................................................................................ 18 7.23 夹具与机床联接元件 ............................................................................................ 18 7.24 定位误差分析 ........................................................................................................ 18 7.25切削力及夹紧力的计算 ......................................................................................... 18

8 设计体会..................................................................................................................................... 18 9 参考文献..................................................................................................................................... 19

轴承盖零件图