Global Patent Index - EP 0839587 A1

EP 0839587 A1 19980506 - Method for rolling thick plates

Title (en)

Method for rolling thick plates

Title (de)

Verfahren zum Walzen von Grobblechen

Title (fr)

Procédé pour laminer des tÔles fortes

Publication

EP 0839587 A1 19980506 (DE)

Application

EP 97118206 A 19971021

Priority

DE 19645497 A 19961105

Abstract (en)

The method concerns rolling of thick sheet metal from a preliminary material in several successive stages, with different numbers of passes (n) according to a particular desired end product, in one or several roll stands, but preferably in a single hot revers-ing stand. The method is characterised by the fact that from a pass (n-k) onwards to a pass (n-1), where k lies in the range from 1 to n-1, the pass reductions produced at the beginning of the strip are greater than those produced at the end of the strip.

Abstract (de)

Beim Walzen von Grobblechen aus einem Vormaterial in mehreren hintereinander geschalteten Walzstichen ergeben sich bei relativ kleinen Enddicken - besonders in den letzten Stichen - große Walzkraftunterschiede zwischen Bandkopf und Bandende aufgrund der Abkühlung des Walzgutes, und der am Bandende dann kälteren Temperatur des Walzgutes. Um diesem Mangel abzuhelfen, schlägt die Erfindung vor, ab einem bestimmten Walzstich am Bandkopf eine höhere Stichabnahme zu walzen als am Bandende. <IMAGE>

IPC 1-7

B21B 1/38; B21B 37/24

IPC 8 full level

B21B 1/34 (2006.01); B21B 1/38 (2006.01); B21B 27/02 (2006.01); B21B 37/24 (2006.01); B21B 1/02 (2006.01)

CPC (source: EP KR US)

B21B 1/222 (2013.01 - KR); B21B 1/38 (2013.01 - EP US); B21B 37/24 (2013.01 - EP US); B21B 37/58 (2013.01 - KR); B21B 1/026 (2013.01 - EP US); B21B 2261/04 (2013.01 - KR); B21B 2265/12 (2013.01 - KR); B21B 2265/14 (2013.01 - KR)

Citation (search report)

  • [PX] GB 2308083 A 19970618 - ENCOMECH ENG DEV LTD [GB]
  • [XAY] GB 1111576 A 19680501 - ALGOMA STEEL CORP LTD
  • [XA] US 4555922 A 19851203 - GINZBURG VLADIMIR B [US]
  • [A] US 4860564 A 19890829 - KAPLAN NAUM M [US]
  • [XY] DATABASE WPI Section Ch Week 9025, Derwent World Patents Index; Class M21, AN 90-191258, XP002056221
  • [X] PATENT ABSTRACTS OF JAPAN vol. 004, no. 102 (M - 022) 22 July 1980 (1980-07-22)
  • [X] DATABASE WPI Section Ch Derwent World Patents Index; Class M21, AN 71-69205S, XP002056222

Designated contracting state (EPC)

AT BE DE ES FI FR GB IT NL SE

DOCDB simple family (publication)

EP 0839587 A1 19980506; EP 0839587 B1 20011205; AT E209974 T1 20011215; CA 2220412 A1 19980505; CA 2220412 C 20080318; DE 19645497 A1 19980507; DE 59705654 D1 20020117; ES 2169310 T3 20020701; ID 18570 A 19980423; JP 4263262 B2 20090513; JP H10166003 A 19980623; KR 100517714 B1 20051128; KR 19980042089 A 19980817; MX 9708512 A 19980531; MY 123098 A 20060531; RU 2203748 C2 20030510; TW 338728 B 19980821; US 5943894 A 19990831

DOCDB simple family (application)

EP 97118206 A 19971021; AT 97118206 T 19971021; CA 2220412 A 19971103; DE 19645497 A 19961105; DE 59705654 T 19971021; ES 97118206 T 19971021; ID 973598 A 19971104; JP 30082097 A 19971031; KR 19970058117 A 19971105; MX 9708512 A 19971105; MY PI9705188 A 19971103; RU 97118327 A 19971104; TW 86115214 A 19971016; US 96370397 A 19971104