高速机车风挡玻璃格栅模设计关键技术研究

作为一种品种多而批量小的热弯成型曲面夹层玻璃，高速机车风挡玻璃 要满足气动性、可视性和安全性等要求，模具设计是缩短研发周期和降低研发成本的关键技 术之一。从精度、重量和成本三方面对比分析了实心模、空心模和格栅模，选格栅模为热弯 成型模具。基于通用CAD 平台的设计方式，导致格栅模的设计工作具有较高的复杂度和重 复度。为了提高设计效率和设计质量，首先，在考虑热弯成型工艺的基础上，提出并实现格 栅模基平面的确定和转正方法，给出方法的流程图和具体数学公式，以及实例和数据。其次， 通过输入起止位置和型线数目实现型线自动提取、编号和记录，规范型线提取流程，给出型 线提取实例。最后，基于上述关键技术开发的专用设计软件，成功应用于北京明盾技术有限 公司系列高速机车风挡玻璃研制，给出了格栅模和风挡玻璃的实例，初步验证了方法的有效 性和软件的实用性。

The Key Technology of Lattice Mold Design of Windshield Glasses inHigh-Speed Train

As one kind of surface laminated glasses with thermal bending process in multiple species and small batch, the windshield glasses in high-speed train need to meet the requirements of aerodynamics, visuality and security. The mold design is one of the key technologies to shorten the development cycle and the cost. The lattice mold is preferred to the solid mold and the frame mold comparing with tolerance, weight and cost. The means of lattice mold design based on the general CAD software, leads to high complexity and repeatability. To enhance the designing efficiency and quality, firstly, the approach to calculate and adjust the basic plane is proposed, elaborated by the chart and exemplified by the example. Secondly, the process to get the mold curves is standardized by inputting the boundary position and the numbers. Thus the mold curves are serialized and saved. Lastly, including the functions of calculating the bending distance and inquiring the corner points, the special software is developed based on the proposed approach, applied by the Beijing MingDun technology Ltd. The pictures of the lattice mold and the corresponding windshield glasses are given, which verify the practicability and effectiveness of the proposed approach and the developed software preliminarily.