Abstract
The paper presents the results of a numerical simulation of the distortions in drawpieces, generated during the production of the drawpieces using the hot stamping method. A division of the distortions is proposed depending on their shape and based on the industrial experience of the author of this publication, i.e., concerning flexure and torsion (skewing). Numerical simulations of the hot stamping process were performed for the representative drawpieces, in which the hardening distortions can be assigned to the above specified forms. A numerical compensation of the hardening distortions was proposed to obtain, after the compensation process, a drawpiece complying with the requirements concerning shape and dimensional tolerances. The results of the simulations have been confirmed in the course of the experimental studies. Conclusions and recommendations for the analysis of the process were also elaborated.
Highlights
In the development stage, the reduction of the mass of the modern passenger car is one of the main objectives faced by the designers of the passenger cars’ body structure. [1,2]
Some selected components of the car body structure are produced from 22MnB5 steel [3,4]
The above specified values of the thermo-mechanical parameters are recommended and confirmed in practice by the producer of the Autoform software, and such values should be taken to simulation of the hot stamping processes
Summary
The reduction of the mass of the modern passenger car is one of the main objectives faced by the designers of the passenger cars’ body structure. [1,2]. It is important to assure a suitable selection of thermal and mechanical parameters for this process, such as: austenitizing temperature, transfer time of the blank from the furnace to the press, cooling rate in the press, quenching time. All these factors are critical for the final properties of the product [8]. In the heated-up zone of the tool, non-martensitic transformation occurs in the shaped drawpiece, and the material features lower-mechanical parameters comparing to the ones in the water cooled zone [11]. As their final effect, cause distortions and dimensional changes of the hardened element [12,16]
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