摘要本次毕业设计主要以薄壁件的设计为例，研究薄壁件的3D建模，模具设计，以及数控加工。内容包括：利用软件对薄壁件进行实体建模，对薄壁件件的形状、尺寸及其精度的要求进行注塑成型工艺的可行性分析，初步拟定注塑模结构方案，注塑模具结构类型及模架的选用，模具推出机构设计，利用CAM软件进行数控加工并通过后处理生成加工程序。本毕业设计课题充分让我利用到了大学四年里所学到的相关的专业知识，从薄壁件的建模，到分型面模架的设计，再到塑件结构工艺性的分析，最后到零件的生成以及数控加工程序生成，这些都与我大学四年来所学的专业知识密不可分。这是对我这四年来所学知识的一次系统性的检验，不仅培养了我自主学习能力，还使我养成了分析问题解决问题的良好习惯。73909

该论文有图57幅，表1个，参考文献16篇。

毕业论文关键词：3D建模  模具设计  数控加工 

Thin-walled parts 3D modeling, mold design and CNC machining

Abstract This graduation designed to be thin-walled parts of the design as an example, 3D modeling of thin-walled parts, mold design, and CNC machining。 Include: the use of software for solid modeling of thin-walled parts, pieces of thin-walled shape, size and accuracy requirements of the injection molding process of the feasibility study, the initial development of injection mold structure of the program, the process of analyzing the structure of plastic parts Select injection molding equipment, the choice of design and parting surface to determine the gating system, injection mold structure and the type of mold, mold ejection mechanism design, the use of CAM software for CNC machining and post-processing to generate the machining program。 The graduation project fully let me take advantage of the relevant expertise learned four years of college, from modeling of thin-walled parts, the mold parting surface design, to analyze the structure of the process of plastic parts, and finally and to generate NC machining program generation parts, which are inextricably linked with my four years of college to learn professional knowledge。 This is the ability for my four years as a systematic test of science knowledge, and improved my self-study, analyze and solve problems。

Key Words: 3D Modeling  Mold Design  NC 

目       录

摘  要 I

Abstract II

图清单 III

表清单 IV

1 绪论 1

1。1 模具工业的地位 1

1。2 国外塑料模具发展概况 1

1。3我国塑料模具发展概况 1

1。4 本文研究内容 2

2 塑件结构及成型工艺分析 3

2。1产品建模过程 3

2。2 塑件结构分析 6

2。3 塑件的分析 7

2。4 材料性能分析 7

3 分型面选择及型腔数量的确定 8

3。1 型腔数目的确定 8

3。2 分型面位置的确定 8

4 注射机的选择和校核 10

4。1 塑件体积的估算