EP0857522B1 - Rolling mill - Google Patents

Abstract

The rolling section, in particular, a tandem roll stand group, consists of three roll stands (in particular, two universal roll stands and an upsetting roll stand between them) with guide sets, an operator-side shunting stage (11) and a changing trolley for roll changing operations. The guide sets (20) are joined to the roll sets (12) and, as single units, are movable out of the rolling line together with the operator-side roll support structures (2a, 3a, 4a) of the three roll stands (2, 3, 4).

Description

The invention relates to a rolling mill, in particular a tandem stand group, consisting of three rolling stands, each with guide fittings, in particular two universal stands and one arranged between them Compression scaffold, with a transfer platform arranged on the operator side and for Roll changing movable carriage.

In a rolling mill of this type which has become known from EP 0 329 998 B1, the two stationary universal roll stands and one arranged between them Compressing stand, is used to mechanize the change of rolls and fittings the middle frame, i.e. the upsetting stand and thus the smallest stand on the rolling mill shifted to the operating side out of the rolling line. As soon as that Compression scaffolding a position outside the confined space between the takes two heavy universal scaffolding, it is easily accessible from all sides, so that the guide fittings can be changed without hindrance. At the same time it results by moving the compression frame between the universal frames Sufficiently large free space in which assembly or Have dismantling devices used so that the guide fittings Univrsal scaffolding can be replaced. However, with this known rolling mill both for the roller sets and for those to be changed Guide fittings separate transfer platforms or platforms and working platforms needed so that crossing paths result. In addition, to change the Roller sets require an indoor or auxiliary crane, its use or application can pose a risk to personnel.

The invention has for its object, in a generic rolling mill, e.g. Kontistraße or tandem scaffolding group to change the exchange units easier to design with fewer individual movements and safer.

This object is achieved in that the guide fittings with the roller sets are connected and as a unit together with the operator-side roll stands of the three roll stands from the roll line can be pulled out. By doing this for a tandem scaffolding group or cont for the roll change known methods of the operator Roller stand is used for the individual stands and according to the invention in addition, the roller set is already provided with the guide fittings, the Exchange of the roller sets with the firmly integrated guide fittings essential perform easier and safer. Because as soon as the roller stands on the The sliding platform only needs to be loosened with the chock retaining flaps be, so that the roller sets on the transfer platform with the from the Have the scaffold out of the change car. after the The roller stand can be moved down from the transfer platform new roller sets provided on the transfer platform by a appropriate shifting of the platform to re-equip the scaffolding in position to be brought.

Apart from the fact that the separate assembly - as described in the beginning State of the art known - the guide fittings are eliminated by the Fittings attached to fittings have a complete check already at the Pre-assembly enables. It does not matter whether the individual scaffolding of the Tandem scaffolding group are designed as duo scaffolding or horizontal and Vertical roller sets, and instead of three universal stands could Scaffolding group also consisting of two universal scaffolding with one in between middle upsetting structure. This is then also with a removable designed on the operator side roll stand, so that the compression frame is not needs to be completely moved out of the roller line. When changing is So much free space achieved that with a universal scaffold over the usual length additional web guides are possible.

A preferred proposal of the invention provides that the roll chocks screwed-on guide holders are articulated to the fittings. According to In an embodiment according to the invention, the fittings are each on one screwed with articulated armature bearings trained beam, which as Bridging member between two facing guide holders is arranged. When pre-assembling the roller set, the roller beams are needed thus only to be used in the screwed-on guide holder to the Roll set to be completed as a unit with the guide fittings.

Fig. 1

in der Draufsicht eine Gesamtansicht einer Tandemgerüstgruppe, deren Einzelgerüste wegfahrbare bedienungsseitige Walzenständer aufweisen, mit einer den Walzgerüsten an der Bedienseite zugeordneten Verschiebebühne;

Fig. 2

in der Draufsicht ein im Teilschnitt durch die Walzenständer dargestelltes Einzelgerüst der Tandemgerüstgruppe gemäß Fig. 1;

Fig. 3

einen Schnitt durch das Walzgerüst entlang der Linie III-III in Fig. 2;

Fig. 4

als Einzelheit einen Schnitt durch das Walzgerüst entlang der Linie IV-IV in Fig. 2;

Fig. 5

in der Draufsicht ein auseinandergefahrenes Walzgerüst der Tandemgerüstgruppe nach Fig. 1, im Teilschnitt dargestellt; und

Fig. 6

das Walzgerüst gemäß Fig. 5 im Teil-Querschnitt dargestellt.

Further details and advantages of the invention emerge from the claims and the following description, in which an exemplary embodiment of the subject matter of the invention schematically illustrated in the drawings is explained in more detail. Show it:

Fig. 1

in the top view an overall view of a tandem stand group, the individual stands of which have removable operator-side roller stands, with a transfer platform assigned to the roller stands on the operating side;

Fig. 2

in plan view an individual stand of the tandem stand group according to FIG. 1, shown in partial section through the roll stands;

Fig. 3

a section through the roll stand along the line III-III in Fig. 2;

Fig. 4

as a detail a section through the roll stand along the line IV-IV in Fig. 2;

Fig. 5

in the plan view an extended roll stand of the tandem stand group of Figure 1, shown in partial section. and

Fig. 6

5 is shown in partial cross-section.

A rolling mill 1 shown in the exemplary embodiment according to FIG. 1 consists of three Individual scaffolding, of which the two outer as universal scaffolding 2, 3 and that middle frame are designed as a compression frame 4. Roll stands 2 to 4 are on the drive side 5 on well-known as such, not shown in detail Drives connected. In the rolling direction 6, the front universal stand 2 or the rear universal scaffold 3 roller tables 7 with driven roller table rollers 8 and guide or centering rulers 9 arranged thereon are connected upstream or downstream. On the operating side 10 is located in and against the rolling direction 6 adjustable transfer platform 11, which is used to change the roller sets 12 of the stands 2 to 4 of the rolling mill 1 is used.

To change the roller sets 12 are the universal stands 2, 3 and that Compression mill 4 with roller stands 2a, 3a which can be moved away on the operating side 10 and 4a, as shown in detail in FIGS. 5 and 6 for the universal framework 2 shown. The stationary roller stands on the drive side are in operation 2b or 3b and 4b with the removable roller stands 2a or 3a, 4a over four Tie rods 13 braced together. This the two roller stands 2a, 2b and 3a, 3b or 4a, 4b connecting hydraulically pre-tensioned tie rods are of course solved for the removal of the roller sets 12, because only then can the operator-side roller stand 2a or 3a, 4a into that in FIGS. 5 and 6 move the shown position away from the stationary roll stand 2b or 3b, 4b; this happens by means of the roller stands 2a, 3a, 4a acting on the operator side Displacement cylinders 18. When the vehicle moves away, the roller stands on the drive side run 2a, 3a, 4a on the transfer platform 11, where the roller sets 12 with the on Rails 16 movable change car 17 remain.

As soon as the roller sets 12 with the change car 17 in their position on the Transfer platform 11 are set, the operator-side roller stand 2a, 3a, 4a moved down from the transfer platform 11, as shown in FIG. 1. It then only need those previously on the transfer platform 11 in FIG. 1 to be brought into position, shown on the left, new roller sets 12, for which the Transfer platform 11 is moved in the direction of arrow 19 until the new one Roll sets are in alignment with the roll stands 2, 3 and 4. The installation then happens in reverse order, i.e. the operator-side roller stands 2a, 3a and 4a are again moved to the transfer platform 11, where they with the the new roller sets 12 ready for the change carriage 17 are locked, to then then again in the closed scaffold position shown in Fig. 1 arrive in which they by means of the hydraulically preloaded tie rods 13 with the stationary roller stands 2b, 3b and 4b are clamped.

With the roll change described above, however, not only the rolls exchanged, but also the guide fittings or web guides 20 of the universal frameworks 2, 3 - the one in FIG. 1 for the sake of simplicity Guide fittings are shown - or the compression frame 4, because the Guide fittings 20 are an integral part of the roller set 12, i.e. the roller set 12 and the guide fittings 20 form a unit. How 2 to 4 can be seen, the chocks 21 of the roller sets 12th Guide brackets 22a, 22b and 23a, 23b screwed, of which two each mutually opposite holders 22a, 22b and 23a, 23b a rolling beam 24 take up. This carries a screw-on attachment 25, which is articulated Valve mountings 26 is provided with the guide fittings 20. In the left or right half of the drawing of Fig. 4 are guide fittings 20 for different large roller diameter shown, of course, a transition to others Roller diameter also requires changing the roller sets 12, like the wear-related replacement of the rollers.

Claims (3)

1. A rolling train (1), in particular, in the form of a tandem stand group consisting of three roll stands (2, 3, 4) that respectively contain guide mountings (20), namely two universal stands (2, 3) and an upsetting stand (4) arranged between the universal stands, with a displaceable platform (11) that is arranged on the operating side, and with a cart (17) that can be displaced in order to exchange the rolls, characterized by the fact that the guide mountings (20) are connected to the sets of rolls (12) and can be removed from the rolling line in the form of a unit together with the roll housings (2a, 3a, 4a) of the three roll stands (2, 3, 4) which are situated on the operating side.
2. The rolling train according to Claim 1, characterized by the fact that guide holders (22a, 22b; 23a, 23b) which are screwed onto the roll installation elements (21) are connected to the mountings (20) in an articulated fashion.
3. The rolling train according to Claims 1 and 2, characterized by the fact that the mountings (20) are respectively screwed onto a rest bar (24) that is realized with articulated bearing arrangements (26) for the mountings, wherein said rest bar is arranged between two guide holders (22a, 22b; 23a, 23b) that face one another in the form of a bridge element.

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