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    • 33. 发明公开
    • Method and tool for folding a metal strip
    • Verfahren und Vorrichting zum Abkanten eines Metallbandes
    • EP1362649A1
    • 2003-11-19
    • EP03101099.4
    • 2003-04-22
    • Delphi Technologies, Inc.
    • Ibron, JanFourile, RogerAntonov, Evgeny
    • B21D11/20
    • F28D1/0391B21C37/083B21C37/151B21D11/20
    • A method for folding a metal strip is proposed, the method comprising the steps of providing a metal strip (70) having a first surface and a second surface; providing the metal strip with a groove (62,62') in the first surface; folding the metal strip into a corner wherein the first surface forms a concave side of the corner and the second surface forms a convex side of the corner and the groove extends along the concave side of the corner; the metal strip being folded by means of at least one set of rollers. According to an important aspect of the invention, one of the rollers comprises a bead pressing the groove into said metal strip, the bead having a substantially rounded profile. The invention further concerns a folded tube having a groove with substantially rounded profile and a forming tool having a bead with substantially rounded profile.
    • 提出一种用于折叠金属条的方法,该方法包括以下步骤:提供具有第一表面和第二表面的金属条(70); 在所述第一表面中为所述金属带提供凹槽(62,62'); 将金属带折叠成角部,其中第一表面形成角部的凹面,第二表面形成角部的凸面,并且凹槽沿着拐角的凹面侧延伸; 金属带通过至少一组辊折叠。 根据本发明的一个重要方面,其中一个辊包括将槽压入所述金属条中的胎圈,所述胎圈具有基本上圆形的轮廓。 本发明还涉及一种具有基本圆形轮廓的凹槽的折叠管和具有基本圆形轮廓的胎圈的成形工具。