EP1038600B1 - Arrangement of the multiple-stand finishing block and the following multiple-stand block in single strand wire rolling mills - Google Patents

Abstract

A selective rolled wire cooling arrangement comprises switch points (6) for guiding wire to a re-rolling unit (3) directly or via a cooling circuit (W2). An arrangement, for selectively non-cooling or cooling of wire between a multistand finishing unit (2) and a closely adjacent multistand re-rolling unit (3) in a single line wire rolling mill train, comprises a switch points unit (6) which guides the wire from the finishing unit (2) to the re-rolling unit (3) either directly or via a circuit (W2) containing one or more cooling lines (9), a wire return (10) and a looper table (11).

Description

The invention relates to an arrangement of the multi-stand finished block and of this, at a small distance downstream multigrade Nachblocks in single-strand wire rod mills for optional non-cooling or cooling treatment between the two blocks passing through the wire strand, (See, for example, Grootaarts M. et al .: "Reconstruction of Five European Wire lines, steel and iron, Verlag Stahleisen GmbH, Vol. 114, No. 10, 12 October 1994).

Arrangements of this type (EP 512 735 B1), the one, the respective different Allow for production requirements adapted more flexible calibration of the rolls and thus also an improved utilization of the rolling mill behind the finishing block an after-block with at least two, but mostly four Rolling mills. Another advantage of this arrangement is that in the secondary block by rolling with reduced decrease in the last stands of this Blocks tolerance improvement is achievable. However, with these arrangements the rolling stands do not meet the different cooling requirements Be taken into account, e.g. which requires thermo-mechanical rolling. Such cooling requirements set more or less long cooling distances preceded by the finished block and the Nachblock, in the generic Arrangements, if designed in the sense of the initially described manner and should not be accommodated.

There are already known rolling mill arrangements, which when using finished block and after-block make possible such cooling treatments of the wire strand. Thus, in DE-AS 42 17 149 describes a roll stand arrangement, the behind the intermediate scaffold group and the finished block two, in and against the Rolling direction against each other sliding 180 ° wire transfers provides, between which one or more cooling sections are arranged. Not one Pre-published patent application (DE-198 43 032) is a rolling stand arrangement in which, in a first rolling line, closely behind one another a finished block and a secondary block and in a second rolling line a second finished block are arranged. The second rolling line branches behind the previous intermediate rolling mill from the first rolling line and leads parallel to this, at the Finished block and block after passing in two 180 ° revolutions in front of this block in the first rolling line back, wherein between the two 180 ° -Umführungen a or more cooling sections are arranged.

From another, not previously published patent application (DE-198 33 505), goes out a rolling mill arrangement in which in two parallel rolling lines, the branching off of each other behind the intermediate stand and in front of the wire processing unit are merged again, in a rolling line a finished block with subordinate block and in the other rolling line After block and behind these blocks each one or more cooling sections are provided.

Starting from these known rolling mill arrangements, the invention is the Task underlying the generic arrangement of a finished block with a near behind this arranged secondary block also for rolling steel usable after rolling in the finishing block e.g. for the control controlled temperature profiles require longer stretches of cooling treatment, before they are rolled in the final block.

This task is done by one, between the finished block and the postblock arranged rolling line crossover solved that leaving the finished block Wire strand either to the secondary block directly or via a bypass rolling line zuleitet, in the one or more cooling sections, as well as a wire guide and a sling table are arranged.

The rolling line switch can, as the invention further provides as arranged between the finished block and the secondary block, transverse to the rolling line slideable switch piece be formed, the multiple wire feedthroughs has, whose input or Ausführöffnungen by the transverse displacement of the Turnout piece either in the rolling line on and out of this are, wherein a wire feedthrough runs in a straight line parallel to the rolling line and the is formed of two, cross-running wire feedthroughs, the by the transverse displacement with one of its mouths as an inlet or outlet opening in the rolling line einbring- and with one of their other mouths than Entry or exit opening with the entrance or the exit of Umführungswalzlinie are connected.

This solution according to the invention allows, with little technical effort and relatively limited space requirement with the generic rolling mill arrangement Even steels to roll, whose rolling a special heat control with the help of more or less long cooling sections needed, with the conversion from one to the other rolling treatment only a conversion of the Walzlinienwechselweiche from one to the other control position requires.

Fig. 1

die Draufsicht auf die Walzgerüstanordnung in schematischer Darstellung,

Fig. 2

eine Einzelheit in der Draufsicht, ebenfalls in schematischer Darstellung und

Fig. 3

die Seitenansicht von Fig. 2.

The invention will be explained in more detail with reference to the embodiment shown in the drawing. In the drawing show

Fig. 1

the plan view of the roll stand arrangement in a schematic representation,

Fig. 2

a detail in plan view, also in a schematic representation and

Fig. 3

the side view of Fig. 2.

As can be seen from Fig. 1, behind the last frame 1 of the rest are not shown intermediate stand line in the rolling line W1 a finished block 2 and a Nachblock 3 arranged at a small distance d. Behind the Nachblock 3 are in the same rolling line W1 cooling sections 4 and behind this the wire collecting device 5 provided. Between finished block 2 and 3 Nachblock is the Walzlinienwechselweiche 6, which (see also Fig. 2 and 3) a rectilinear Wire feedthrough 6a and two crossed wire feedthroughs 6b and 6c. The rolling line switch 6 is guided in a guide 7, here with the help of a thrust unit 8 in the direction of the double arrow D in either two positions movable. In the one shift position is the Wire feedthrough 6 a with its inlet opening and its outlet opening in the Rolling line W1. In the other displacement position are the entrance opening Eöb the branch wire feedthrough 6b and the outlet opening AÖc the other branch wire bushing 6c in the rolling line W1. The exit opening AÖb leads one of the branch wire feedthroughs 6c, as shown in Fig. 1, in a second rolling line, the Umführungszwalzlinie W2, arranged in the cooling sections 9 are. This Umführungswalzlinie W2 is by means of a wire guide 10th and a loop table 11 via the entrance opening Eoec through the branch wire feedthrough 6c and the exit opening AÖc returned to the rolling line W1.

As can be seen, the arrangement with the aid of these rolling line changeover 6 with direct passage of the wire rod coming from the intermediate frame road by finished block 2 and afterblock 3 without any intermediate treatment or with intermediate treatment of the wire strand after its exit from the finished block 2 in the cooling section 9 under length compensation by means of the loop table 11th operated, with the dense distance between finished block 2 and afterblock 3 remains unchanged.

LIST OF REFERENCE NUMBERS

1

(last) scaffolding

2

finishing block

3

Nachblock

4

cooling section

5

Wire collecting device

6

Turnout piece (the rolling line changeover switch)

6a

Grommet

6b

Grommet

6c

Grommet

7

guide

8th

thrust unit

9

cooling section

10

Drahtumführung

11

sling table

AO

output port

ÂÔÊÃ

output port

AÖb

output port

AOEC

output port

EÖ

entrance opening

eoeA

entrance opening

EÖb

entrance opening

EÖc

entrance opening

W1

rolling line

W2

Umführungs-rolling line

d

distance

D

double arrow

Claims (2)

1. An arrangement of a multi-stand finishing block and a multi-stand post finishing block situated a short distance downstream of the finishing block in single-wire rolling mill trains in order to selectively subject the wire strand traveling between the two blocks to a non-cooling or cooling treatment,
   characterized in
   a pitch line change-over unit (6) that is arranged between the finishing block (2) and the post finishing block (3) and serves for selectively advancing a wire strand emerging from the finishing block (2) to the post finishing block (3) directly or via a looping pitch line (W2), in which one or more cooling zones (9), a wire looper (10) and a looping table (11) are arranged.
2. The arrangement according to Claim 1,
   characterized in
   a change-over element (6) that is arranged between the finishing block (2) and the post finishing block (3) and can be displaced transverse to the pitch line (W1), wherein said change-over element contains several wire guides (6a, 6b, 6c), the inlet and outlet openings of which can be selectively displaced into and out of the pitch line (W1) by transversely displacing the change-over element (6), wherein one wire guide (6a) extends linearly parallel to the pitch line (W1) and the other wire guide is formed by two branch wire guides (6b, 6c) that cross one another and can be displaced into the pitch line (W1) with one of their orifices inlet opening (EÖb) or outlet opening (AÖc) and are respectively connected to the inlet and the outlet of the looping pitch line (W2) with their other respective orifice inlet opening (EÖc) or outlet opening (AÖb).

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