CADCAM技术在摩托车护片锻模设计中的应用

摘要：曲面类零件在制造业中处处可见，尤其是模具制造业。传统的设计制造方法是工程图、模线、样板、标准样件等工作方式，生产准备的周期长，制造精度低，生产效率也是低下。随着计算机技术在模具制造业中应用的不断发展，数控加工能力得到了大大提高，模具的设计与制造技术达到了空前的发展。模具CAD/CAM技术已成为模具行业革命化的标志。适应CAD/CAM技术的发展，改变传统的设计与制造方法是模具制造业的发展的方向.

本设计是CAD/CAM技术在锻模曲面加工中的应用。包括两大部分：一是摩托车护片模具的设计；二是模具型面的造型与数控仿真加工。在Mastercam 8.0环境下利用CAD功能进行摩托车护片模具的实体造型，利用CAM功能进行模具刀具路径的编制、模拟加工，并通过后处理生成NC程序。期望通过此课题的研究，能够提高自己对CAD/CAM技术在模具制造业中应用的重要性的认识。

关键词：CAD/CAM技术实体造型仿真加工

指导老师签名：

Application of the CAD/CAM technologyin Motorcycle Jacket’s Forging Mould Designing

Studentname :Lv JiangweiClass :0781052

Supervisor:Yao Kundi

Abstract：It is well known that surface parts can be seen everywhere in the manufacturing, especiallyin the mould manufacturing.The traditionaldesign and manufacturing processes are the engineeringdrafting , lofting , template making , standard samples , etc. , which have the shortages of long production preparation period , low processing accuracy and production efficiency . With the developing of the computer technique’ applicationin the mould manufacturing , NC machining capability has been enhanced greatly,and, the design and manufacturing technique of the mould has obtained enormousprogressat the same time .The CAD/CAM technique has become the revolutionary sign in the mould industry . To be suitable for the tendency of CAD/CAM technique’ development and meet the requirement to change the traditional design /manufacturing modes are the developing direction of the mould industry .

This projectis about the applicationof the CAD/CAM technique in the wroughtmould surface processing . It contains two parts : one is about the moulddesign of the motorcyclejacket and the other is about the numerical control simulate processof the mould surface. Under the environment of Mastercam 8.0 , I will sculptthe mouldof the motorcyclejacket using the CAD function , and then , I will weavethe tool route,simulateprocessing and createthe NC programmevia the back disposing using the CAM function . And at last , I hope I can improve my cognitionto the significanceof the CAD/CAM technique’ applicationin the mould industry by the study of the task.

Keyword:CAD/CAM technique sculpt simulateprocessing

signature of Supervisor:

1 序言

1.1课题研究的目的及意义 (1)

1.1.1模具CAD/CAM的研究目的 (1)

1.1.2模具CAD/CAM的研究意义 (1)

1.2国内外研究现状 (1)

1.3本课题研究内容 (2)

2摩托车护片模具的设计

2.1零件结构和工艺分析 (3)

2.1.1零件结构分析 (3)

2.1.2零件工艺分析 (3)

2.1.3锻模设计方案的确定 (4)

2.2锻件图的设计和绘制 (5)

2.2.1确定锻件的分模面 (5)

2.2.2确定锻件的机械加工余量及锻件公差 (6)

2.2.2.1加工余量的确定 (6)

2.2.2.1.1估算锻件质量 (6)

2.2.2.1.2加工精度 (6)

2.2.2.1.3计算锻件的形状复杂系数S (7)

2.2.2.1.4模锻件的加工余量的构成 (7)

2.2.2.2模锻件公差的确定 (8)

2.2.2.2.1材质系数M (8)

2.2.3确定模锻斜度 (8)

2.2.4确定模锻件的圆角半经 (9)

2.2.5冲孔连皮设计 (10)

2.2.6绘制锻件图的技术条件 (10)

2.3终锻模膛设计 (11)

2.3.1热锻件图 (11)

2.3.1.1收缩率 (11)

2.3.1.2 绘制热锻件图 (12)

2.3.2确定模锻设备吨 (13)

2.3.2.1热模锻曲柄压力机模锻工艺特点 (13)

2.3.2.2计算锻件的主要参数 (13)

2.3.2.3曲柄压力机吨位选择 (13)

2.3.2.4飞边槽的设计 (14)

2.3.2.4.1飞边槽的选择 (14)

2.3.2.4.2飞边槽的尺寸的确定 (15)

2.4 确定坯料的尺寸 (16)

2.4.1确定制坯工步 (16)

2.4.2确定毛坯尺寸 (17)

2.5 机锻模结构设计 (18)

2.5.1模架结构型式 (18)

2.5.2模架设计 (18)

2.5.3锻模总体结构 (19)

2.5.4机锻模的闭合高度 (20)

2.5.5镶块设计 (20)

2.5.5.1镶块水平方向的尺寸 (20)

2.5.5.2镶块的高度尺寸 (21)

2.5.5.3数据核算 (21)

2.5.6顶料装置设计 (22)

2.5.7导向装置设计 (22)

2.5.8锻模材料的选用和寿命 (24)

2.6锻模图的绘制 (24)

3 模具曲面造型与数控仿真加工

3.1概述 (24)

3.2Mastercam软件介绍 (25)

3.3上镶块模仿真 (26)

3.3.1曲面造型 (26)

3.3.2数控仿真加工 (31)

3.4下镶块模仿真 (42)

3.4.1曲面造型 (43)

3.4.2下镶块模的数控仿真加工 (43)

结论 (46)

参考文献 (47)

致谢 (48)

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