Research Of The Forming Regulation And Database Design Of Hydroforming Automobile Axle Housing

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.