Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
STUDY ON THERMOMECHANICAL BEHAVIOR OF COOLED DIE APPLIED TO HOT STAMPING PROCESS
Submission Author:
Caio Grisotto , SP
Co-Authors:
Caio Grisotto, Gregory Bregion Daniel
Presenter: Gregory Bregion Daniel
doi://10.26678/ABCM.COBEM2023.COB2023-1489
Abstract
Automotive industries have assumed an increasingly competitive hole in relation to the development of new products. In addition, initiatives to ensure greater sustainability have been strongly adopted in this sector, mainly aiming to guarantee the manufacture of lighter and more efficient vehicles, without compromising the resistance, safety and comfort requirements safeguarded by normative entities. In this scenario, the hot stamping process is a powerful technology for manufacturing of automotive structural components, allowing to reduce the weight of structural components, increase the mechanical and fracture strength of the stamped components and guarantee the dimensional quality of the final products. In general, the increase of the mechanical strength of the stamped components is due to the martensitic microstructure, which is obtained in the cooling phase of the blank inside the closed die during the process. As blank cooling occurs inside the dies, an efficient design of the die and its cooling system is essential to increase tool life and ensure high mechanical strength in the stamped part. Thus, there are three main parameters that need to be studied in order to obtain a die design with good performance in your cooling system, namely: the distance from the cooling channel to the die’s surface, the distance between neighbors cooling channels and the diameter of the cooling channel. Although hot stamping is currently a well-established process, the simulation of this process by Finite Element Method incorporating thermal and structural behaviors is still a challenge. Within the context, this work aims to simulate the hot stamping process by Finite Element Method, in order to evaluate the thermomechanical effects both in the stamped part and in the tools (die and punch). The results obtained through these thermomechanical analyses provide important contributions related to the effects of positioning, quantity and geometry of the cooling channels in relation to the temperature and stress distributions in the components involved in the process. This way, possible improvements can be established to the die design, in order to guarantee better production quality and mechanical strength for manufacturing of stamped parts.
Keywords
Hot Stamping, Finite Element Method, Cooling Channels, Die design
