洛阳理工学院毕业设计（论文）I基于 Pro/E 的山地自行车造型设计摘 要山地自行车，英文名叫“mountain bike”，缩写为 MTB。山地自行车设计是一项十分重要的工作，也是一门专业的抖学。国外山地自行车工业发达的国家都在自行车设计中投入了大量人力、物力和财力，也取得了很好的效果。我国虽然被称为自行车生产王国，但在产品设计工作上与国外先进水平相比还存在差距。为了迅速提高我国自行车水平，必须在设计工作中下功夫。山地自行车设计涉及到大量计算和技术问题，本设计将利用 PRO/E、CAD等软件从模型出发到一整部山地自行车的成型的介绍。将从山地自行车设计的技术经济指标、山地自行车设计的使用要求和步骤、山地自行车设计人员要求、山地自行车影响出功率的机械因素、山地自行车行驶阻力、山地自行车安全要求、山地自行车设计的配合要求八个方面。关键词：山地自行车，PRO/E，CAD，机械因素洛阳理工学院毕业设计（论文）IIPro/E Based On The Mountain Bike Modelling DesignABSTRACTMountain bike, called “mountain bike“ English, abbreviation for MTB. Mountain bike design is a very important work, is also a kind of professional shaking learn. Foreign mountain bike industry developed countries are in bicycle design invested a huge human, material and financial resources, and good results have been achieved. Although China is called the kingdom of bicycles, but production product design work compared with foreign advanced level also has the disparity. In order to quickly raise our bicycle level in design work, we must make great efforts.Mountain bike design involves substantial computation and technical problems, this design will use PRO/E, such as CAD software to a whole department from the model of the mountain bike molding introduction. Mountain bike design from technical and economic indexes, the use of the mountain bike design requirements and steps, mountain bike design personnel requirements, mountain bike influence the mechanical factors, the power of the mountain bike driving resistance, mountain bike safety requirements, mountain bike with eight aspects of design requirements.KEY WORDS: Mountain bike，PRO/E，CAD，Mechanical factors洛阳理工学院毕业设计（论文）III目 录前 言.1第 1 章 山地自行车设计的技术经济指标.2第 2 章 自行车行驶阻力分析.52.1 滚动阻力.52.2 空气阻力.52.3 内部阻力.5第 3 章 山地自行车设计的要点.73.1 材料因素.73.1.1 下面就几种材料做具体分析.73.1.2 材料的选择.113.2 结构因素.123.2.1 车架.133.2.2 前叉.143.2.3 车把及位置.153.2.4 前轴、后轴和中轴.153.2.5 脚蹬.163.2.6 飞轮.163.2.7 变速器.173.2.8 前后轮.183.2.9 鞍座及高度.193.2.10 前后闸.203.2.11 曲柄.20第 4 章 自行车车座的模具设计.214.1 塑件成型工艺性分析.214.1.1 塑件的分析.214.1.2 PC 的性能分析.214.1.3 PC 的注射成型过程及工艺参数.224.2 拟定模具的结构形式.22洛阳理工学院毕业设计（论文）IV4.2.1 分型面位置的确定.234.2.2 型腔数量和模具结构形式的确定.234.2.3 注射机型号的确定.244.2.4 主流道的设计.254.3 成型零件的设计.264.3.1 成型零件的结构设计.264.4 模架的确定.274.4.1 各模板尺寸的确定.274.5 冷却水线的设计.274.6 总装配图和部分零件图的绘制.28第 5 章 鞍座模具的上模腔的 NC 代码 .2