EP 4164817 A2 20230419 - APPARATUS AND METHOD FOR PRE-FORMING A METAL STRIP FOR THE MANUFACTURE OF ROLL FORMED AND WELDED TUBES
Title (en)
APPARATUS AND METHOD FOR PRE-FORMING A METAL STRIP FOR THE MANUFACTURE OF ROLL FORMED AND WELDED TUBES
Title (de)
VORRICHTUNG UND VERFAHREN ZUR VORFORMUNG EINES METALLBANDES ZUR HERSTELLUNG VON WALZGEFORMTEN UND GESCHWEISSTEN ROHREN
Title (fr)
APPAREIL ET PROCÉDÉ DE PRÉFORMAGE DE BANDE MÉTALLIQUE POUR LA FABRICATION DE TUBES FORMÉS PAR ROULEAUX ET SOUDÉS
Publication
Application
Priority
- SE 2050714 A 20200615
- EP 2021065683 W 20210610
Abstract (en)
[origin: WO2021254884A2] An apparatus and method for pre-forming a metal strip (40) for the manufacture of roll formed and welded tubes, comprising an embossing tool (20) and a strip edge chamfering tool (30) wherein the embossing tool comprises an embossing roll (1) having a cylindrical surface (2) with a central embossing portion (3, 3'), and the strip edge chamfering tool comprises an edge chamfering roll (31) comprising a recessed central section (34) and side sections (35) on each side of the central section, and an anvil roll (32), wherein the edge chamfering roll (31) and the anvil roll (32) are configured to receive and pass the metal strip in a clearance (33) formed between the rolls, wherein the clearance (33) has a reduced height in the side sections, which are located in a position where the longitudinal side edges of the metal strip will pass, so that the longitudinal side edges on each side of the metal strip, and on the embossed side of the metal strip become chamfered when being passed between the pair of rolls (31, 32).
IPC 8 full level
B21C 37/08 (2006.01); B21C 37/20 (2006.01); B21H 8/00 (2006.01); F28F 1/40 (2006.01)
CPC (source: EP KR US)
B21B 15/0007 (2013.01 - US); B21C 37/0826 (2013.01 - EP KR); B21C 37/207 (2013.01 - EP KR); B21H 8/005 (2013.01 - EP KR)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2021254884 A2 20211223; WO 2021254884 A3 20220210; CN 115884838 A 20230331; EP 4164817 A2 20230419; JP 2023531170 A 20230721; KR 20230025700 A 20230222; MX 2022016043 A 20230419; US 2023278085 A1 20230907
DOCDB simple family (application)
EP 2021065683 W 20210610; CN 202180042012 A 20210610; EP 21733410 A 20210610; JP 2022576384 A 20210610; KR 20237001674 A 20210610; MX 2022016043 A 20210610; US 202118010302 A 20210610