摘 要: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#br# 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#br# 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#br# 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#br# 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#br# 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,#br# 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#br# 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#br# 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#br# 性和软件的实用性。#br# 关 键 词:格栅模;风挡玻璃;曲面;几何变换;高速机车
Abstract: As one kind of surface laminated glasses with thermal bending process in multiple#br# species and small batch, the windshield glasses in high-speed train need to meet the requirements#br# of aerodynamics, visuality and security. The mold design is one of the key technologies to shorten#br# the development cycle and the cost. The lattice mold is preferred to the solid mold and the frame#br# mold comparing with tolerance, weight and cost. The means of lattice mold design based on the#br# general CAD software, leads to high complexity and repeatability. To enhance the designing#br# efficiency and quality, firstly, the approach to calculate and adjust the basic plane is proposed,#br# elaborated by the chart and exemplified by the example. Secondly, the process to get the mold#br# curves is standardized by inputting the boundary position and the numbers. Thus the mold curves#br# are serialized and saved. Lastly, including the functions of calculating the bending distance and#br# inquiring the corner points, the special software is developed based on the proposed approach,#br# applied by the Beijing MingDun technology Ltd. The pictures of the lattice mold and the#br# corresponding windshield glasses are given, which verify the practicability and effectiveness of#br# the proposed approach and the developed software preliminarily.#br# Key words: lattice mold; windshield glasses; surface; geometric transformation; high-speed#br# train
摘要: 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。