Research On The Key Technologies Of Rear Windshield Tempering Forming

Windshield is an important accessory to a car. With the progress in large curvature, hyperboloid, large spherical flat of windshield, trial and error method has been unable to meet the needs of development for new product. Therefore, the further research of windshield hot-bend and tempering forming process, which combined with finite element numerical simulation technology, established a comprehensive numerical model, has the important theoretical significance and practical value. This paper deals with the numerical simulation analysis of windshield forming, and puts forward a cyclic displacement compensation method for windshield mold surface design.Based on the finite element theory of viscoelastic materials, hot-bend forming is studied theoretically. Based on the 3D transient heat conduction and thermal-structure coupled theory, the mathematical models of tempering stage are set up.With the instance of the wgl450_R rear windshield, the numerical simulation analysis of the forming progress has completed with finite element analysis software—ANSYS. The distributions of the stress, strain and deformating procedure of the windshield forming are gotten. The simulation result was compared with the experimental and actual datum, and it can be concluded that the simulation precision was acceptable and reliable.Based on the results of numerical simulation of windshield forming, refered to sheet metal forming die-face compensation method for rebound, the paper puts forward a cyclic displacement compensation method for windshield mold surface design by ANSYS and UG. Finally, the paper summarizes windshield mold surface design ideas, which provides a reference for windshield mold design.