Browsing by Keyword "Hot stamping"
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Item Case Study to Illustrate the Potential of Conformal Cooling Channels for Hot Stamping Dies Manufactured Using Hybrid Process of Laser Metal Deposition (LMD) and Milling(2018-02) Cortina, Magdalena; Arrizubieta, Jon; Calleja, Amaia; Ukar, Eneko; Alberdi, Amaia; FABRIC_INTELHot stamping dies include cooling channels to treat the formed sheet. The optimum cooling channels of dies and molds should adapt to the shape and surface of the dies, so that a homogeneous temperature distribution and cooling are guaranteed. Nevertheless, cooling ducts are conventionally manufactured by deep drilling, attaining straight channels unable to follow the geometry of the tool. Laser Metal Deposition (LMD) is an additive manufacturing technique capable of fabricating nearly free-form integrated cooling channels and therefore shape the so-called conformal cooling. The present work investigates the design and manufacturing of conformal cooling ducts, which are additively built up on hot work steel and then milled in order to attain the final part. Their mechanical performance and heat transfer capability has been evaluated, both experimentally and by means of thermal simulation. Finally, conformal cooling conduits are evaluated and compared to traditional straight channels. The results show that LMD is a proper technology for the generation of cooling ducts, opening the possibility to produce new geometries on dies and molds and, therefore, new products.Item Hot stamping of aerospace aluminium alloys: Automotive technologies for the aeronautics industry(2022-09) Atxaga, G.; Arroyo, A.; Canflanca, B.; EXTREMAT; PROMETAL; SGThis paper proposes the use of the hot stamping process that provides ready to use parts for the obtention of aircraft components as an alternative manufacturing technology to e.g. machined parts. The development has been focused on the study of the high temperature formability of aluminium alloys. The feasibility of hot forming the AA2198 aluminium‑lithium alloy into complex shapes component has been studied. A wide experimental campaign has been carried out to set up the optimum hot stamping process parameters. In addition, forming trials with different geometries (omega and B-pillar shapes) have also been performed and, after the corresponding heat treatment, material properties have been recovered. Simulations of the hot stamping process have been carried out with Pamstamp® 2G software. These results have been correlated with the ones obtained in the experimental campaign. As a final step of the development, a demonstrator corresponding to a wing rib has been successfully manufactured. Characterization carried out to the prototype indicate specifications are fulfilled.