Analysis of an improved width‐flow concept for the production of ribbed strips by cold rolling

In today's increasingly competitive business environment, companies must look for innovative solutions to survive the competition. In the metal forming industry the engineers are turning to new technologies in order to achieve the goals. One new innovative process is the macroscopic structurati...

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Veröffentlicht in:Steel Research 1999-03, Vol.70 (3), p.110-114
Hauptverfasser: Schroller, Frank, Pawelski, Oskar, Rasp, Wolfgang
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creator Schroller, Frank
Pawelski, Oskar
Rasp, Wolfgang
description In today's increasingly competitive business environment, companies must look for innovative solutions to survive the competition. In the metal forming industry the engineers are turning to new technologies in order to achieve the goals. One new innovative process is the macroscopic structuration of strips by cold rolling for use in light‐weight constructions. Components with a macro‐structured surface demonstrate ‐ on the condition of equal weight ‐ a higher area moment of inertia and consequently a higher stiffness than non‐structured workpieces. The subjects presented in this paper refer to ribbed sheets produced in a cold‐rolling process. Particularly the material flow into the rib pocket is studied in a simplified model as a function of different set‐up parameters like tool geometry, deformation, and friction. The theoretical investigations are carried out by the upper‐bound theory. The results are compared with an FEM‐analysis. Der zunehmende industrielle Wettbewerb zwingt die Industrie zu Innovationen. Hierzu müssen neue Technologien entwickelt werden. Eine Innovation stellt das Fertigungsverfahren des makroskopischen Strukturierens von Bändern für den Leichtbau mit Hilfe des Kaltwalzprozesses dar. Diese Strukturbauteile zeichnen sich gegenüber konventionellen Bauteilen ‐ unter der Annahme gleichen Bauteilgewichtes ‐ durch ihr höheres Flächenträgheitsmoment aus. In dieser Arbeit wird die Herstellung von Rippenblechen durch den Kaltwalzprozeß dargestellt. In einem vereinfachten Modell wird der Materialfluß in die Rippentaschen in Abhängigkeit verschiedener Parameter, wie Werkzeuggeometrie, Umformgrad und Reibung, untersucht. Die theoretischen Untersuchungen basieren auf dem Obere‐Schranken‐Theorem. Die Ergebnisse werden mit der FEM‐Analyse verglichen.
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Eine Innovation stellt das Fertigungsverfahren des makroskopischen Strukturierens von Bändern für den Leichtbau mit Hilfe des Kaltwalzprozesses dar. Diese Strukturbauteile zeichnen sich gegenüber konventionellen Bauteilen ‐ unter der Annahme gleichen Bauteilgewichtes ‐ durch ihr höheres Flächenträgheitsmoment aus. In dieser Arbeit wird die Herstellung von Rippenblechen durch den Kaltwalzprozeß dargestellt. In einem vereinfachten Modell wird der Materialfluß in die Rippentaschen in Abhängigkeit verschiedener Parameter, wie Werkzeuggeometrie, Umformgrad und Reibung, untersucht. Die theoretischen Untersuchungen basieren auf dem Obere‐Schranken‐Theorem. 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subjects Applied sciences
Exact sciences and technology
Forming
Metals. Metallurgy
Production techniques
Rolling
title Analysis of an improved width‐flow concept for the production of ribbed strips by cold rolling
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