机械工艺夹具毕业设计22阀堵工艺工装设计及CADCAM

摘要

本毕业设计题目是阀堵工艺工装设计及CAD/CAM，来自岫岩××机械有限公司。××公司专门从事国外机加工生产，主要的加工对象是阀体类零件，在精密铸造方面也有着他们自己的先进技术。

分析零件特点拟订合理的工艺规程，依据工艺规程设计，选择机床和设计合理的夹具。

设计内容：利用Pro/engineer的零件模块建造实体模型；利用CAXA电子图版绘制零件的工艺规程表和夹具设计图；利用MasterCAM模拟上表面各槽的加工路线和生成数控代码，利用CIMCO Edit对生成的数控代码进行仿真。

设计难点：在零件的工艺规程设计中，零件下表面粗糙度要求较高，通过精磨可以达到要求。零件中心孔的粗糙度要求也较高，通过磨销即可达到要求。零

的专用铣刀完成。零件下表件上表面0.38深圆槽较难加工，在加工中心用38

.0

面4.83宽圆槽也比较难加工，利用加工中心完成。

关键词：模具；夹具；模拟制造；实体造型

Abstract

The subject of this design is designing the assembly and craft of valve base. It also relate to CAD/CAM. This subject task comes from Xiuyan ××Machinery CO.LTD which works in machining production for abroad. Its main machining objects are parts like types of valve base. It has advanced technology in investment casting.

The feature of the parts is analyzed so as to plan the reasonable process and select the corresponding machine and inspection.

Content of design: The parts module of the Pro/engineer is used to build the work piece. CAXA electric plate is used to draw the accessory's stipulation chart of technic and design of jig. MasterCAM is used to simulate the processing route of every trough of above surface and turn into the numerical control code. CIMCO Edit is used to carry on simulation to the numerical control code produced.

Difficulties in design: In the simulation design of technic, low roughness is requested for the accessory's undersurface which can be achieved by carefully grinding. The roughness of the core bore should also be low, and it can be realized by grinding too. On the components the superficial 0.38 deep circular slot are difficult to process, and a special-purpose milling cutter is used in the machining center. The components undersurface 4.83 wide circular slots are also quite difficult to process, and it can be completed using the machining center.

Key words：mould；jig；simulating manufacturing；physical model

第1章绪论 (1)

1.1 模具工业的概况 (1)

1.2 我国模具工业现状 (1)

1.3 我国模具工业的发展方向 (3)

1.4 模具CAD/CAE/CAM发展概况及趋势 (3)

第2章零件的三维造型 (6)

2.1 零件的结构特征分析 (6)

2.2 零件的三维造型过程 (6)

2.3 零件三维造型的心得 (6)

2.4 零件三维造型图片 (7)

第3章阀座体的机械加工工艺规程设计 (8)

3.1 阀座体工艺规程设计 (8)

3.1.1 零件的结构工艺性分析 (8)

3.1.2 计算生产纲领，确定生产类型 (8)

3.1.3 毛坯种类及其制造方法的确定 (9)

3.2 工艺路线的拟订 (9)

3.2.1 定位基准的选择 (9)

3.2.2 制定工艺路线 (9)

3.2.3 选择加工设备及工艺装备 (11)

3.3 切削用量和工时定额的确定 (11)

3.3.1 基本计算公式的引用 (11)

3.3.2各道工序的设计 (12)

3.4 工艺合理性分析 (43)

3.5 填写工艺卡片 (43)

第4章机床专用夹具的设计 (44)

4.1 机床专用夹具设计的基本要求 (44)

4.2 钻床夹具Ⅰ的设计 (45)

4.2.1 确定夹具类型 (45)

4.2.2 拟定定位方案和选择定位元件 (45)

4.2.3 夹具的整体结构设计 (45)

4.2.4 夹紧力的分析 (45)