PRODUCTION OF A METAL PART BY MEANS OF HOT PRESSING AND PART THUS OBTAINED
The invention relates to the production of a metal part, by means of pressing, from a blank that is at least partially made from a hardening material. According to the invention, the blank is heated to a temperature that is suitable for the subsequent hardening thereof and then pressed in a pressing...
Gespeichert in:
Hauptverfasser: | , , |
---|---|
Format: | Patent |
Sprache: | eng ; fre |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | The invention relates to the production of a metal part, by means of pressing, from a blank that is at least partially made from a hardening material. According to the invention, the blank is heated to a temperature that is suitable for the subsequent hardening thereof and then pressed in a pressing tool (27, 29) which shapes the part (1) as desired, said part being hardened and cut along the desired outer contour (42). In addition, localised heating means (41) are used for the temporary heating of a marginal zone (30, 33, 34, 35) which extends alongside the edge (22, 24, 26, 42) in order to prevent stresses during cutting or to relieve stresses that occur during cutting. The invention can be used to prevent cracks from appearing along the edge of the pressed part.
La présente invention concerne la fabrication, par emboutissage, d'une pièce métallique à partir d'un flan réalisé au moins partiellement en un matériau trempant . Le flan est chauffé à une température convenant à sa trempe ultérieure puis embouti dans un outil d'emboutissage (27, 29) qui donne à la pièce (1) la forme requise, en provoquant la trempe, et la découpe au contour extérieur requis (42) . Des moyens de chauffage localisés (41) sont utilisés pour chauffer temporairement une zone marginale (30, 33, 34, 35), longeant le contour (22, 24, 26, 42) pour éviter l'apparition de contraintes à la découpe ou détendre les contraintes apparaissant à la découpe. Application à la prévention de criques le long du contour de la pièce emboutie. |
---|