DE102021207948A1 - Roll changing device for changing the working and/or intermediate rolls of a roll stand - Google Patents

Abstract

The invention relates to a roll-changing device (1) for changing the working and/or intermediate rolls (2) of a roll stand, the roll-changing device (1) comprising a roll-changing carriage (3) with which the rolls (2) to be replaced or replaced can be transported. In order to develop such a roll-changing device in such a way that it is possible to ensure simplified and safe loading and unloading of a roll-changing carriage, the invention provides that the roll-changing device (1) comprises a cassette (4) which can be removed in the roll-changing carriage (3). can be arranged, the cassette (4) being equipped with receptacles (5) for the rollers (2).

Description

The invention relates to a roll-changing device for changing the working and/or intermediate rolls of a roll stand, the roll-changing device comprising a roll-changing carriage with which rolls to be replaced or replaced can be transported.

A roll changing device of this type is for example in EP 0 911 089 B1 disclosed. The device described there is used for quick roll changes on a six-roll rolling stand, with a roll-changing carriage being used. Similar and other solutions show the EP 1 136 143 B1 , the EP 2 150 361 B1 , the EP 3 167 975 B1 and the JP H07 108 305 A

So far, the procedure has been such that when changing work or intermediate rolls, the individual rolls are transported separately between the roll stand and roll-changing carriage or between the roll-changing carriage and roll workshop.

The disadvantage here is that the process of changing the rollers is difficult to automate. Furthermore, a high activity of the crane system is required for changing, which is located on the rolling mill to transport the individual rolls.

Due to the corresponding number of manual interventions in the vicinity of the rolling plant when changing the rolls, there is also a certain safety problem, so that a relatively high level of effort is required to work safely. A special problem is that the personnel who load and unload the roll changing carriage are sometimes not adequately protected against roll breakouts during the crane activities.

Changing the rolls and specifically the loading and unloading of the roll-changing carriage is therefore time-consuming and personnel-intensive and correspondingly expensive.

The invention is based on the object of developing a roll-changing device of the type mentioned at the outset in such a way that it is possible to ensure simplified and safe loading and unloading of a roll-changing carriage. Furthermore, this process should be able to be accomplished faster, so that more economical work is possible. Finally, the security conditions should be able to be improved.

The solution of this problem by the invention is characterized in that the roll-changing device comprises a cartridge that can be detachably arranged in the roll-changing carriage, the cartridge being equipped with receptacles for the rolls.

The cassette preferably has a plurality of receiving spaces for rollers arranged one above the other.

It may be provided with a load attachment means for engaging a crane hook.

A preferred embodiment of the invention provides that the cassette consists of two basic components, namely a base body, which has the receiving spaces for the rollers, and a crane traverse, which can be detachably connected to the base body. The crane traverse is preferably provided with the load attachment means for engaging a crane hook.

The crane traverse can surround the base body of the cassette at least on part of the outer sides of the base body when the base body and the crane traverse are connected to one another. The crane traverse preferably has a number of vertically extending columns; between four and eight, preferably six, vertically extending columns can be provided.

For the purpose of producing a transport lock, it is particularly advantageous if, according to a further development, it is provided that the base body has a longitudinal extension that corresponds to the axis of the rollers accommodated, with at least one column being arranged in the axial end area of the base body in relation to the longitudinal extension if the Base body and the crane traverse are connected to each other.

The roll changing device is preferably part of a cold or hot flat rolling mill.

The proposed concept is therefore based on providing a transportable (separate) cassette for loading and unloading the roll-changing carriage, which can be placed in the roll-changing carriage and transported by it after it has been fitted with rollers to be replaced or replaced.

Accordingly, when changing the working and/or intermediate rolls, the cassette is loaded with the individual rolls and the loaded cassette is then lifted into the roll-changing carriage by means of the indoor crane. It is preferred, but not mandatory, to use all of the receiving locations for rollers that are provided in the cassette.

With a suitable crane system (indoor crane), the interchangeable cassette can be opened automatically placed on the change car and also removed from it again. With suitable devices, the cassette can be automatically loaded and unloaded in the roller workshop.

The preferred mode of operation for the use of the roll changing device described thus provides that the cassette (in the state removed from the roll changing carriage) is fitted with the rolls on the roll stand or in the roll shop or the rolls are removed from the cassette. When the cassette is loaded, it is placed on the roll changing carriage (using a crane). The rolls are therefore exchanged between the roll stand and the cassette or between the cassette and the roller workshop, with the cassette not being on the roll-changing carriage.

As explained, the cassette can be made in one piece or in two pieces (consisting of a base body and a crane traverse). In the latter case, the base body of the cassette is surrounded by a custom-made crane traverse (load suspension).

In this case, the crane traverse can secure the rollers in the cassette for transport, i. H. the rollers are then secured in the base body of the cassette against displacement in the direction of their longitudinal axis. This is also very advantageous when new or refurbished rolls are to be transported, since damage during transport to the roll stand can be avoided.

Another advantage is that the rollers can be quarantined without interruption, i. H. Roller breakage due to thermal stresses cannot endanger the operating personnel.

The proposal according to the invention can be implemented inexpensively by a simple and inexpensive construction of the cassette (which applies in particular to the above-mentioned two-part embodiment).

A further advantage is that when the proposed concept is used, after a roll change, the readiness to change the rolls again is given very quickly.

The cassette can also be loaded automatically in the roller workshop, i. H. manual assembly of the cassette in the roller workshop can be avoided, which is advantageous in terms of time, accuracy and safety.

The cassettes can also be used as a roller storage point in the roller workshop.

Overall, this results in greater safety in the rolling mill, less crane activity when loading and unloading the rolls and savings in terms of operating personnel during the roll change.

With regard to the general procedure for changing rolls in a roll stand, reference is made expressly to the above EP 0 911 089 B1 of the patent applicant. Here it is described in particular how the handling of the rolls to be changed is carried out with a "side shifter" using a tong truck.

• 1 in perspektivischer Darstellung eine Walzenwechselvorrichtung zum Wechseln der Arbeits- und/oder Zwischenwalzen eines Walzgerüsts, wobei ein Walzenwechselwagen dargestellt ist, in den eine Kassette für die Aufnahme der zu wechselnden Walzen eingesetzt ist,
• 2 in perspektivischer Darstellung die Anordnung gemäß 1, wobei die Kassette aus dem Walzenwechselwagen herausgehoben ist,
• 3 in perspektivischer Darstellung die Kassette mit aufgenommenen Walzen,
• 4 in perspektivischer Darstellung den Grundkörper der Kassette,
• 5 in der Vorderansicht den Grundkörper der Kassette gemäß 4,
• 6 in perspektivischer Darstellung zwei übereinander angeordnete, gestapelte Grundkörper der Kassette,
• 7 die mit Walzen bestückte Kassette während des Transports mit einem Kran, wobei eine um eine Horizontalachse verschwenkte Position der Kassette dargestellt ist,
• 8 in perspektivischer Darstellung eine zu 2 analoge Anordnung, wobei hier die Kassette in einer anderen Ausführungsform realisiert ist, und
• 9 schematisch den Vorgang des Be- bzw. Entladens der Kassette mit Walzen, wofür eine Verschiebevorrichtung („Zangenwagen“) zum Einsatz kommt.

Exemplary embodiments of the invention are shown in the drawing. Show it:

• 1 a perspective view of a roll changing device for changing the working and/or intermediate rolls of a roll stand, with a roll changing carriage being shown, in which a cassette for receiving the rolls to be changed is inserted,
• 2 in a perspective view the arrangement according to 1 , with the cassette lifted out of the roll changing carriage,
• 3 a perspective view of the cassette with the rollers,
• 4 a perspective view of the main body of the cassette,
• 5 in the front view the main body of the cassette according to 4 ,
• 6 a perspective view of two stacked base bodies of the cassette arranged one above the other,
• 7 the cassette equipped with rollers during transport with a crane, with the cassette being shown in a position pivoted about a horizontal axis,
• 8th in a perspective view of a 2 analog arrangement, in which case the cassette is realized in a different embodiment, and
• 9 Schematic of the process of loading and unloading the cassette with rollers, for which a shifting device ("tong carriage") is used.

In 1 a roll-changing device 1 can be seen, which consists essentially of a roll-changing carriage 3 and at least one cassette 4, which serves to accommodate the rolls 2 to be loaded or unloaded. The rolls 2 are the work rolls or intermediate rolls required in a rolling stand. Thus includes the roll-changing device 1 has at least one cassette 4, which can be detachably arranged in the roll-changing carriage 3. Cassette 4 is equipped with slots 5 (see Fig. 5 ) equipped for the rollers 2.

There is thus the possibility of first loading the cassette 4 with the rollers 2 on the rolling stand (not shown) and then inserting the loaded cassette into the roll-changing carriage 3 by means of an indoor crane. this is in 2 illustrated, where it can be seen that the cassette 4 is not yet in its receiving space in the roll changing carriage 3. The handling or the transport of the cassette by means of the hall crane allow load suspension means 6, which are arranged on the cassette 4.

A preferred embodiment (according to 1 until 7 ) provides that the cassette 4 is formed essentially in two parts. It comprises, on the one hand, a base body 7 and, on the other hand, a crane traverse 8; this works best 3 out. Here, in particular in the context of the 4 and 5 can be seen that the base body 7 with a substantially cuboid base geometry has a longitudinal extent L which corresponds to the axis of rotation of the rollers 2 to be accommodated. This results in axial end areas 13 and 14 of the base body 7.

The crane traverse 8 is then placed on the base body 7 loaded with rollers 2 and anchored to the base body 7 . For this purpose, engaging hooks (not shown) of the crane traverse can be used, which engage in corresponding recesses in the base body 7 . The cassette 7 fitted with rollers can then be transported by the overhead crane by means of the load attachment means 6 and brought to the roller-changing carriage 3 .

Out 3 It can be seen that the crane traverse 8 has a plurality of columns 10, 11, 12 which extend in the vertical direction (this means the vertical when the device is used as intended), with the columns 10, 11, 12 being on the outside 9 (see Fig . in particular 5 ) of the base body 7 get into position when the crane traverse 8 is placed on the base body 7 and connected to it. The columns 10, 11, 12 extend in the vertical direction, starting from a part of the traverse arranged at the top, and are free here so that they can be placed on the base body 7 without any problems. This makes it particularly easy to couple the base body 7 equipped with rollers 2 to the crane traverse 8 and thus complete it for transport.

In this context, it should be pointed out that a column 10 comes to lie in one axial end area 13 and a column 12 in the other axial end area 14 . This can be made in an advantageous manner, a transport lock, which is from 7 results. A position of the cassette 4 during transport is shown here, the cassette unfavorably coming to rest at an angle to the vertical V during transport. Accordingly, the rollers 2 can move in the longitudinal direction L in the cassette 4 . However, this movement is limited by the columns 10 or 12 and thus the rollers 2 are prevented from falling out of the cassette 4 .

In 5 are the different recording places 5 for the rollers 2 indicated. Out 6 shows that several base bodies 7 can be stacked, which is advantageous in terms of accommodation.

In 8th An alternative embodiment of the cassette 4 can be seen, a different design being provided here. The crane traverse 8 also provided here engages in the upper end area of the base body 7 . This figure also shows a protective cover 15, which can be provided in all variants and which offers protection in the event of the roller bursting.

In 9 Figure 11 illustrates how the cassette 4 is handled when rolls 2 are loaded into or unloaded from the cassette 4. For this purpose, a pulling or pushing device 16 is provided, with which the individual rollers 2 can be successively pushed out of the cassette 4 in the longitudinal extension L or pulled into it. A lifting device 17 positions the cassette in that vertical position in which the pulling or pushing device 16 can engage in the corresponding receiving space 5 for the roller 2 . In the 9 The handling shown can be used both on the roll stand and in the roll shop.

• Es ist eine Walzennachverfolgung bei der automatischen Beladung der Kassette 4 in der Walzenwerkstatt möglich. Jede Walze 2 wird hierzu mit einem Identifikationselement, beispielsweise mit einem RFID-Chip, versehen. Der Chip wird bei der Beladung der Kassette 4 durch Einsatz eines geeigneten Lesegeräts an der Beladeeinheit in der Walzenwerkstatt ausgelesen. Zudem besitzt jede Kassette 4 ein solches Identifikationselement, beispielsweise einen RFID-Chip. Somit ist gewährleistet, dass jede Walze 2 und ihre Position in der Wechselkassette 4 bekannt sind.

The proposed concept can be supplemented by the following design, which allows improved tracking of the individual rollers:

• It is possible to follow up the rolls during the automatic loading of cassette 4 in the roll workshop. For this purpose, each roller 2 is provided with an identification element, for example with an RFID chip. The chip is read out when the cassette 4 is loaded by using a suitable reading device on the loading unit in the roller workshop. In addition, each cassette 4 has such an identification element, for example an RFID chip. This ensures that each roller 2 and its position in the interchangeable cassette 4 are known.

The roll changing carriage 3 also has reading devices at the release positions of the cassette 4, which detect the cassettes 4. It is thus known which roll 2 is in which position and which position it assumes in the stand after the roll change.

The rollers can be selected by connecting to a roll shop management system, which, for example, also receives data or information from a digital maintenance system (system for managing maintenance measures). Depending on the production planning, the cassette 4 can be equipped with this according to the situation.

While only a small number of rolls can be accommodated in a cassette 4 (at least two), it is also possible to design a cassette 4 to accommodate a complete set of rolls in the case of a four-high or six-high stand.

Reference List

1

roll changing device

2

Work roll / intermediate roll

3

roller changing car

4

cassette

5

Mounting place for the roller

6

load attachment means

7

body of the cassette

8th

crane traverse of the cassette

9

outside of the body

10

pillar

11

pillar

12

pillar

13

axial end area of the base body

14

axial end area of the base body

15

protective hood

16

pulling / pushing device

17

lifting device

L

Longitudinal extension of the body

V

vertical

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 0911089 B1 [0002, 0027]
• EP 1136143 B1 [0002]
• EP 2150361 B1 [0002]
• EP 3167975 B1 [0002]
• JP H07108305 [0002]

Claims (10)

Roll-changing device (1) for changing the working and/or intermediate rolls (2) of a roll stand, the roll-changing device (1) comprising a roll-changing carriage (3) with which the rolls (2) to be replaced or replaced can be transported, characterized in that the roll-changing device (1) comprises at least one cassette (4) which can be detachably arranged in the roll-changing carriage (3), the cassette (4) being equipped with receptacles (5) for the rolls (2). Roll changing device after claim 1 , characterized in that the cassette (4) has a plurality of receiving spaces (5) for rollers (2) arranged one above the other. Roll changing device after claim 1 or 2 , characterized in that the cassette (4) is provided with load attachment means (6) for engagement of a crane hook. Roll changing device according to one of Claims 1 until 3 , characterized in that the cassette (4) consists of two basic components, namely a base body (7) which has the receiving locations (5) for the rollers (2), and a crane traverse (8) which is connected to the base body (7 ) can be detachably connected. Roll changing device after claim 4 , characterized in that the crane traverse (8) is provided with the load attachment means (6) for engaging a crane hook. Roll changing device after claim 4 or 5 , characterized in that the crane traverse (8) surrounds the base body (7) at least on part of the outer sides (9) of the base body (7) when the base body (7) and the crane traverse (8) are connected to one another. Roll changing device after claim 6 , characterized in that the crane traverse (8) has a number of vertically extending columns (10, 11, 12). Roll changing device after claim 7 , characterized in that the crane traverse (8) has between four and eight, preferably six, vertically extending columns (10, 11, 12). Roll changing device after claim 7 or 8th , characterized in that the base body (7) has a longitudinal extent (L) which corresponds to the axis of the accommodated rollers (2), with at least one column (10, 12) in each case in the axial end region (13 , 14) of the base body (7) is arranged when the base body (7) and the crane traverse (8) are connected to one another. Roll changing device according to one of Claims 1 until 9 , characterized in that it is part of a cold or hot flat rolling mill.

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