【作者】 梁欣；

【导师】 王平；

【作者基本信息】 天津科技大学 ， 机械设计及理论， 2004， 硕士

【摘要】 复杂曲面在机械产品，特别在模具设计中应用广泛。由于复杂曲面的特点，决定了只有用CAD／CAM技术才能缩短产品的设计、制造周期，提高产品的质量。经过50多年的发展，CAD／CAM技术已经得到了广泛的应用。提高CAD／CAM技术在复杂曲面零件设计制造中的应用水平，具有非常重要的意义。 本课题是天津市教委科技发展基金项目“复杂曲面CAD／CAM及数控铣削工艺参数优化的研究”(项目编号：2001YY01)的部分内容。课题的主要内容是在现有的CAD／CAM软件(如UG NX1.0中，探索复杂曲面造型和数控铣削工艺参数优选的有效方法，提高复杂曲面模具的设计加工的效率和质量。 本文的主要完成以下工作： 1．根据复杂曲面的特点和要求，讨论了几种造型方法(包括直接建模法、逆向工程法、利用CAS方法和矢量化图像处理等方法)的应用和特点。 2．探讨了运用CAD／CAM系统进行复杂曲面数控编程的方法和特点。 3．根据KBE的原理，采用Visual C++6.0编写了数控铣削工艺参数优选程序。运用该程序，可以进行复杂曲面零件CAM的数控铣削工艺参数的优选。 4．利用复杂曲面的造型方法获得的模型和数控铣削工艺参数优选程序选择的参数，在加工中心上，进行了鼠标上盖凸模和可乐瓶底凹模的铣削加工实验。实验表明，曲面造型方法是可行的，数控铣削工艺参数优选程序选择的工艺参数是合理的。更多还原

【Abstract】 Sculptured surfaces are widely adopted in design of mechanical products especially in the design of mould and die. The characteristics of sculptured surfaces have result in the application of the technology of CAD/CAM, which shortens the periods of designing and manufacturing and improves the quality. With 50 years’ development, the technology of CAD/CAM is widely used. It is meaningful to improve the level of its application in the design and manufacture of sculptured surfaces.The case is part of the project Study On CAD/CAM of Sculptured Surfaces And Proper Selecting of Parameters of NC Millig(Project NO.:2001YY01), which is funded by the Fund for development of Science and Technology of Tianjin Education Committee. The purpose of the paper is to seek the effective methods of modeling the sculptured surfaces and selecting the proper NC milling parameters in the general software of CAD/CAM such as UG NX, Pro/E.The main work includes:1. Several modeling methods are adopted in our research: (1) the direct modeling method; (2) Reverse Engineering method; (3) Modeling in CAS system;. (4) Other modeling ways.2. The characteristics of applying the CAD/CAM system to program the NC program of sculptured faces are exploited.3. Basing the theory of KBE, compile the application of selecting optimistic NC milling parameters. The application can be used to help to selecting the optimistic NC milling parameters in the milling of parts with sculptured surfaces4. Basing the selected parameters and the model which was created with the above methods, carry out the experiment of milling the male die of the mouse’s upper shell and the cavity die of the bottle’s floor. The experiment verified the feasibility of the model and the NC milling parameters.更多还原