铣床主轴的机械加工工艺规程及铣键槽专用夹具设计

毕业设计说明书

题 目: 铣床主轴的机械加工工艺规程及铣键槽专用夹具设计

院(系)、部：学生姓名： 指导教师： 职称 专 业： 班 级： 完成时间：

摘 要

在机械制造工业中，由于被加工零件形状和表面以及精度要求不同而发展、产生了种类繁多的金属切削机床。在生产实际中大量使用铣床、磨床、钻床、镗床以及直线运动机床等。

毕业设计是学生学完相应课程及先行课程之后进行的实习性教学环节，是大学生的必修环节，其目的在于通过机床运动的结构设计，使学生在设计构思，方案分析，结构工艺性，机械制图，零件计算，编写技术文件和查阅技术资料等方面得到综合训练，树立正确的设计思想，掌握基本的设计方法，培养学生具有初步的结构分析，结构设计和计算能力。

本次设计是对主轴机械加工工艺规程与铣键槽专用夹具进行全面设计，使其满足实际生产工作的需要。

关键字：铣床； 工艺； 专用夹具； 主轴； 设计

ABSTRACT

In machine manufacture industry,because is processed the components shape and surface as well as the procision request different develops、has produced the type many metal cutting engine bed.Is producing actual massive uses the milling machine,the grinder,the drilling machine,the boring lathe as well as the translation engine bed and so on.

The graduation design is the practise teaching link which carries on afterwards in the student study corresponding curriculum and the advance curriculum,is university student's compulsory.Its goal lies in through the engine bed movement structural design ,causes the students in to draw up the transmission and in the speed change structure plan process,obtains the design idea,the plan analysis,the structure technology capability,the mechanical drawing,the comonents computation,the compilation technology document and aspect and so on consult technical data integrated trainings,set up the correct design concept,grasps the basic design method,and trains the students to have the preliminary structure analysis,the structural design and computation ability.

The design is a special fixture for milling spindle machining process planning milling keyway design to meet the needs of the actual production work.

Key words: milling machine ; Technology; Special fixture; spindle; design

目 录

摘 要 .................................................................. 1 ABSTRACT ................................................................ 2 前 言 .................................................................. 5 1. 零件的分析 ........................................................... 6

1.1 零件的作用 ...................................................... 6 1.2 零件的工艺分析 .................................................. 6 2 基准的选择 ............................................................ 6

2.1 粗基准的选择 .................................................... 6 2.2 精基准的选择 .................................................... 7 3 制定工艺方案 .......................................................... 7

3.1 工艺路线的制定 .................................................. 7 3.2 工艺方案的比较与分析 ............................................ 8 4 机械加工余量，工序尺寸及毛坯尺寸的确定 ................................ 8

4.1毛坯直径的确定 ................................................... 8 4.2毛坯长度L的确定： ............................................... 9 4.3毛坯过渡圆角的确定 ............................................... 9 4.4 加工余量的确定 ................................................. 10 5 确定切削用量及基本工时 ............................................... 10

5.1工序一：车端面，钻中心孔 ........................................ 10

5.1.1粗车Φ84端面 .............................................. 10 5.1.2车Φ60端面： .............................................. 12 5.2工序二：粗车各外圆 .............................................. 13

5.2.1 粗车Φ84外圆 ............................................. 13 5.2.2 粗车Φ75外圆 ............................................. 15 5.2.3 粗车Φ70外圆 ............................................. 16 5.2.4 粗车Φ68外圆 ............................................. 16 5.2.5 粗车Φ60外圆 ............................................. 17 5.2.6掉头粗车Φ70外圆 .......................................... 17 5.3 工序三：半精车各外圆 ........................................... 18

5.3.1半精车Φ84外圆 ............................................ 18 5.3.2半精车Φ75外圆 ............................................ 20 5.3.3 半精车Φ70 ................................................ 21 5.3.4 半精车Φ68 ................................................ 22 5.3.5 半精车Φ60 ................................................ 22 5.3.6掉头半精车Φ70 ............................................ 23 5.4 工序四：倒角 ................................................... 23 5.5工序五：粗精铣前端键槽 .......................................... 23

5.5.1 粗铣 ...................................................... 24 5.5.2精铣：由于精铣时和粗铣时是同一刀具，故切削用量及工时均与粗铣相同。 ............................................................ 25 5.6 工序六：精车各外圆、切槽，并倒角 .............................. 25

5.6.1 精车Φ84 .................................................. 25 5.6.2 精车Φ75 .................................................. 26 5.6.3精车Φ70 .................................................. 27 5.6.4精车Φ68 .................................................. 28 5.6.5精车Φ60 .................................................. 28 5.6.6 掉头精车Φ70 .............................................. 29 5.6.7切槽4×0.4： .............................................. 29 5.7 工序七：粗精铣对称键槽 ......................................... 30

5.7.1粗铣： .................................................... 30 5.7.2 精铣 ................................ …… 此处隐藏：9584字，全部文档内容请下载后查看。喜欢就下载吧 ……