【作者】 程文冬；

【导师】 王连东；

【作者基本信息】 燕山大学 ， 车辆工程， 2007， 硕士

【摘要】 液压胀形技术一种制造空心轻体构件的先进制造技术，用液压胀形工艺生产出的桥壳，可以满足车辆制造轻量化的要求，而且制件壁厚分布合理、强度刚度高。以往液压胀形工艺的设计一般都基于经验积累，耗费时间和资金，效率不高。本文取0.75吨载重车桥壳的1／2缩小比例试件进行液压胀形试验研究，首先对汽车桥壳模型进行了参数化设计，建立汽车桥壳三维模型库，并根据试验数据建立试验数据库，揭示液压胀形桥壳成形的内在规律。本文在前期工作的基础上，建立并完善了液压胀形汽车桥壳数字模型库，根据试验桥壳的几何形状在UG(Unigraphics)建模环境中构造汽车桥壳的三维立体模型，利用UG为客户二次开发提供的UG／OPEN API程序设计模块、UG／OPEN MenuScript和UG／OPEN UIstyler两个辅助开发模块，运用VC++语言建立模型数据库，满足用户对汽车桥壳模型的需求。基于大量的汽车桥壳的液压胀形试验，对试验数据进行整理汇总。运用Access数据库管理系统DBMS(DataBase Management System)结合Visual Basic编程语言，建立液压胀形汽车桥壳的试验数据库。本数据库可分为三部分：成功试件、起皱失稳试件和破裂试件。试验数据库可以清晰的表达不同种类试件的图像、几何参数、加载路径以及各种试验参量，并且能够对试验数据进行搜索、添加、修改、删除等数据管理操作。最后根据大量的试验数据，对典型成功试件和失效试件进行理论研究分析，得到成功试件的合理加载路径、破裂与起皱失稳试件的成形判据，揭示管件在不同加载路径下的成形规律。本文完善了汽车桥壳的三维模型库，建立了液压胀形桥壳的试验数据库，揭示管件在不同加载方案下液压成形规律，为管件的成形提供可靠的理论依据，能够指导模拟、试验以及生产。更多还原

【Abstract】 The axle housing manufactured by hydroforming can meet the requirement of light weight in automotive making. The products are of reasonable thickness distribution, high strength and high rigidity. The hydroforming technic which based on the former experiences is inefficient and wastes time and fund. Aiming at above problems, this thesis takes 1/2 scale samples of a 0.75 t truck axle housing to hydroforming test and research. First it puts up the to the axle housing model and upbuild the axle housing model database. Second, it designs the testing database based on the testing data and then search the internal regulation of axle housing hydroforming.This thesis carries out the hydroforming parametric design and perfects it on the base of former work. Three-dimensional model of the axle housing will be constructed according to the geometrical shape in the UG modeling system. In the VC++ system DLL will be created by the modules of UG/OPEN API、UG/OPEN MenuScript and UG/OPEN UIstyler, which are provided by UG secondary development. The axle housing model database can meet the user’s requirement.Testing data will be settled and managed according to a mass of axle housing hydroforming experiment. This thesis upbuilds the testing database of axle housing hydroforming by the use of Access DBMS and Visual Basic. The data can divided to three series: successful tubes、wrinkled tubes and cracked tubes. The database can clearly express the different tube images、parameters、loading paths and so on,as well as the data management and operation such as searching、adding、amending、deleting.Finally, to get the right loading path and the criterion of the failed tubes, this thesis make an academic research and analysis to the typical successful and failed tubes based on testing database. Hydro forming regulation under different loading path will be showed. This thesis perfects the axle housing model database and upbuilds the axle housing hydroforming database. Hydroforming regulation of tubes is showed under different loading path and the reliable basis is provided for it. The simulation、experiment and production would be well instructed.更多还原