The invention relates to a method for producing at least one notch (11, 12, 13, 13a, 13b) in an outer wall of a tube (10), with the following steps: ET1) guiding a first punch (50) comprising a preforming tooth (52), causing the preforming tooth to penetrate through the wall of the tube until a protuberance (55, 56) is formed, a solid cylindrical mandrel (58) being positioned inside the tube; then, ET2) guiding a second punch (70, 80) with a punching tooth (72, 82), the leading end (73, 83) of the punching tooth (72, 82) having a shape that is complementary to a shape of the notch to be made in the tube wall, a punching mandrel (78) being positioned inside the tube and having a groove (79) suitable for containing the upset material. The invention can be used for notching headrests for the seats of a motor vehicle.
Tube notching method, and associated notching machine
22.04.2015
Patent
Elektronische Ressource
Englisch
IPC: | B21C MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING , Herstellen von Blechen, Metalldraht, -stangen, -rohren Metallprofilen oder Halbzeugen auf andere Weise als durch Walzen / B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL , Bearbeiten oder Verarbeiten von Blechen, Metallrohren, -stangen oder -profilen ohne wesentliches Abtragen des Werkstoffs / B21J FORGING , Schmieden / B21K MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS , Herstellen von Schmiede- oder Presserzeugnissen aus Metall, z.B. Hufeisen, Nieten, Bolzen oder Rädern / B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet |