Roll changing device for changing work rolls and / or intermediate rolls of a calender stand

Abstract

The invention relates to a roll changing apparatus 1 for the changing of work rolls and / or intermediate rolls 2 of a rolling stand, which comprises a roll changing vehicle 3, by means of which the rolls 2 to be installed for changing or to be removed for changing can be transported. In order to improve such a roll changing apparatus so as to ensure an easier or secure loading and unloading of the roll changing vehicle, the invention provides that the roll changing apparatus 1 comprises a cassette 4, which can be releasably arranged in the roll changing vehicle 3, which cassette 4 comprises a storage space 5 for the rolls 2.

Description

Technical Field

[0001] The present invention relates to a roll changing device for changing work rolls and / or intermediate rolls of a rolling stand, wherein the roll changing device comprises a roll changing vehicle by which the roll to be attached or removed for replacement can be transported, the roll changing device comprises at least one cassette, and the cassette has an accommodation space for the roll.

Background Art

[0002] A roll changing device of this type is disclosed in Patent Document 1. The roll to be attached for replacement is first moved here to a roll changing vehicle by a roll loading station, and this roll changing vehicle carries a cassette for accommodating these rolls. After the transfer of the rolls from the roll loading station into the roll changing vehicle, the replacement of these rolls is then carried out. A similar solution is shown in Patent Document 2. Another roll changing device is disclosed in Patent Document 3. The device described therein is used for rapid roll changing in a six-high rolling stand, in which case a roll changing vehicle is used. Similar, as well as yet another solution, is shown in Patent Documents 4, 5, 6, 7, and 8.

[0003] Conventionally, when replacing a work roll or an intermediate roll, the individual rolls are treated so as to be transported separately between the rolling stand and the roll changing vehicle, or between the roll changing vehicle and the roll maintenance yard.

[0004] In this case, the drawback is that the process of roll replacement is difficult to automate. Further, a high operability of a crane device is required, which is arranged in the rolling facility for transporting the individual rolls for replacement.

[0005] During the roll change, due to a corresponding large number of manual interventions in the vicinity of the rolling equipment, there are also safety problems. Therefore, relatively high costs must be incurred for safe operation. A particular problem is that the personnel loading and unloading the roll change vehicle are not fully protected against roll detachment during the entire crane operation.

[0006] The roll change, and especially the loading and unloading of the roll change vehicle, are accompanied by a waste of time and personnel, and accordingly, they are costly.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Patent Document 6

Patent Document 7

Patent Document 8

Summary of the Invention

Problems to be Solved by the Invention

[0008] The problem underlying the present invention is to improve the roll changing device of the type described at the beginning so as to ensure easier or more reliable loading and unloading of the roll changing vehicle. This process should be achieved even more quickly, and thus more economical work should be possible. In short, the safety conditions should be improved.

Means for Solving the Problem

[0009] The solution to this problem according to the present invention is that the cassette can be detachably arranged in the roll changing vehicle, the cassette is provided with a load hooking means for engaging a crane hook, and the cassette consists of two basic structural members, that is, it consists of a group base body having the accommodation space for the roll and a crane cross member that can be detachably coupled to this base body. When the base body and the crane cross member are coupled to each other, the crane cross member surrounds the base body at least in a part outside the base body. The crane cross member has a plurality of struts extending in the vertical direction, and The base body has a longitudinal extension, which corresponds to the axis of the roll accommodated therein. When the base body and the crane cross member are coupled to each other, at least one strut is arranged in an axial end region of the base body with respect to the longitudinal extension. It is characterized by the above.

Effect of the Invention

[0010] The cassette preferably has a plurality of accommodation spaces for the rolls that are arranged overlapping each other.

[0011] Preferably, in that case, the crane cross member is provided with a load hooking means for engaging a crane hook.

[0012] When the base body and the crane cross member are coupled to each other, it is possible for the crane cross member to surround the base body of the cassette, at least in a part outside this base body, at that time.

[0013] The crane cross member preferably has a plurality of struts extending in the vertical direction at that time; and it is possible that the number of the struts extending in the vertical direction is between four and eight, preferably six.

[0014] According to a further configuration, the base body has a longitudinal extension, and this longitudinal extension corresponds to the axis of the roll accommodated therein. When the base body and the crane cross member are coupled to each other, if at least one strut is respectively arranged in the axial end region of the base body with respect to the longitudinal extension, it is particularly advantageous for the purpose of establishing transport safety protection.

[0015] The roll changing device is preferably a component of a cold plate rolling mill or a hot plate rolling mill.

[0016] Accordingly, the proposed concept aims to provide a transportable (separate) cassette for loading and unloading the roll changing vehicle, and this cassette can be positioned in the roll changing vehicle after the mounting of the roll to be attached or removed for replacement, and can be transported by this roll changing vehicle.

[0017] During the replacement of the work roll and / or the intermediate roll, accordingly, the cassette is loaded with individual rolls, and then this loaded cassette is lifted into the roll changing vehicle using an indoor crane. Preferably, but not compulsorily, all the accommodation spaces for the rolls provided in the cassette are utilized at that time.

[0018] By means of a suitable crane facility (indoor crane), the replacement cassette can be automatically installed on the replacement vehicle and can also be removed from this replacement vehicle again. By means of a suitable device, the cassette can be automatically loaded and unloaded in the roll maintenance yard.

[0019] An advantageous method of operation for the use of the described roll changing device is thus that the cassette (in the state removed from the roll changing vehicle) in the rolling stand or in the roll servicing area is intended to receive the rolls or for these rolls to be removed from the cassette. If the cassette is fitted, it is placed (using a crane) on the roll changing vehicle.

[0020] The roll change is thus carried out between the rolling stand and the cassette or between the cassette and the roll servicing area, where the cassette is not located on the roll changing vehicle.

[0021] As described above, it is possible for the cassette to be formed from one member or from two members (from the basic body and the crane cross member). In the latter case of the above, the basic body of the cassette is thus surrounded by a customized (massgefertigten) crane cross member (load suspension device).

[0022] In this case, the crane cross member can assume the task of protecting the transport safety of the rolls in the cassette, i.e. the rolls are protected in this case against movement in the direction of the longitudinal axis of these rolls within the basic body of the cassette. This is also extremely advantageous if new or refurbished rolls are to be transported, since damage during transport to the rolling stand can thus be avoided.

[0023] It is furthermore advantageous that the rolls can be isolated without interruption, i.e. roll detachment due to thermal stress does not expose the operating personnel to danger.

[0024] With a simple and low-cost structure of the cassette (which is particularly effective in the case of the embodiments consisting of the two members described above), the proposal according to the invention can be realized at low cost.

[0025] Furthermore, when using the proposed concept, it is advantageous that, after roll change, very quickly, a state of readiness for a new roll change is provided.

[0026] The mounting of the cassette can likewise be carried out automatically also within the roll servicing area, i.e., manual mounting of the cassette within the roll servicing area can be avoided, which is advantageous with respect to waste of time, accuracy, and safety.

[0027] The cassette can likewise be used as a roll support position within the roll servicing area.

[0028] Thereby, generally, high safety in the rolling equipment, crane operability during loading and unloading of the rolls, and the possibility of savings for the operating personnel throughout the roll change are provided.

[0029] Regarding the treatment method during roll change within the rolling stand, clearly, the applicant's Patent Document 3 described above is cited. Here, in particular, it is explained how the roll to be replaced is handled by means of a "side shifter" under the use of a catching vehicle. 。

[0030] In the drawing, an embodiment of the invention is illustrated.

Brief Description of the Drawings

[0031]

Figure 1

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Figure 3

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DETAILED DESCRIPTION OF THE INVENTION

[0032] In FIG. 1, the roll-changing device 1 can be discerned. This roll-changing device basically consists of a roll-changing vehicle 3 and at least one cassette 4, and this cassette is used for housing the roll 2 to be loaded or unloaded. These rolls 2 are work rolls or intermediate rolls required in the rolling stand. Accordingly, the roll-changing device 1 is provided with at least one cassette 4, and it is possible for this cassette to be detachably arranged in the roll-changing vehicle 3. The cassette 4 is provided with a storage space 5 (see FIG. 5) for the roll 2.

[0033] Accordingly, first of all, there is a possibility of loading the roll 2 onto the cassette 4 in a rolling stand (not shown), and then loading the loaded cassette into the roll changing vehicle 3 using an indoor crane. This is illustrated in FIG. 2, where it can be recognized that the cassette 4 has not yet been placed within the accommodation space of this cassette within the roll changing vehicle 3. The handling or transportation of the cassette using the indoor crane is permitted by the load hooking means 6 arranged on the cassette 4.

[0034] In an advantageous embodiment (according to FIGS. 1 to 7), it is intended that the cassette 4 is basically formed as two members. These cassettes comprise, on the one hand, a base body 7 and, on the other hand, a crane cross member 8; this can be particularly read from FIG. 3. Here, particularly from the integrated perspective of FIGS. 4 and 5, it can be seen that the base body 7 having a basically cuboid-shaped basic geometric shape has a longitudinal extension L, and this longitudinal extension corresponds to the axis of rotation of the roll 2 to be accommodated. Accordingly, the axial end regions 13 and 14 of the base body 7 are provided.

[0035] Next, the crane cross member 8 is placed on the base body 7 loaded with the roll 2, and this crane cross member is fixed to this base body 7. For this purpose, it is possible to use engaging hooks (not shown) of the crane cross member, and these hooks engage into corresponding notches within the base body 7. The cassette 4 with the roll mounted can then be transported by the indoor crane using the load hooking means 6 and moved to the roll changing vehicle 3.

[0036] From FIG. 3, it can be seen that the crane cross member 8 has a plurality of struts 10, 11, 12, and these struts extend in the vertical direction (which should be understood as the vertical direction during the proper use of this device), and in this case, when the crane cross member 8 is placed on and coupled to the base body 7, the struts 10, 11, 12 are arranged outside the base body 7 at 9 (see FIG. 5 in particular). In order for these struts to be placed on the base body 7 without problems, the struts 10, 11, 12 then extend downward in the vertical direction starting from the upper portion of the cross member, and are free here. This makes it particularly easy to connect the base body 7 equipped with the rolls to the crane cross member 8 and thus complete it for transportation.

[0037] In this connection, it can be pointed out that the strut 10 will be located within one axial end region 13 and the strut 12 will be located within the other axial end region 14. In this way, in an advantageous manner, transport safety protection can be established, which is clear from FIG. 7. Here, the position of the cassette 4 during transportation is shown, and in this case, the cassette will be located at an angle with respect to the vertical direction V during transportation in an inconvenient manner. Accordingly, the roll 2 may move within the cassette 4 in the direction of the longitudinal extension L. However, this movement is restricted by the strut 10 or 12, and accordingly, the roll 2 is prevented from falling out of the cassette 4.

[0038] In FIG. 5, different receiving spaces 5 for the roll 2 are suggested. From FIG. 6, it can be read that a plurality of base bodies 7 can be stacked, which is advantageous for storage.

[0039] In FIG. 8, a selective embodiment of the cassette 4 can be seen, where other configurations are provided. The crane cross member 8, which is also provided here, grips here within the upper end region of the base body 7. In this figure, the protective hood 15 is also illustrated, and it is possible that this protective hood is provided in variations of all embodiments and provides protection in the case of roll bursting (Walzenplatzern).

[0040] In FIG. 9, it is illustrated how the cassette 4 is handled when the roll 2 is loaded into or unloaded from the cassette 4. For this purpose, push-in or pull-out devices 16 are provided, by means of which the individual rolls 2 can be pushed out of or pulled into the cassette 4 one after the other within the longitudinally extending L. The lifting device 17 moves the cassette to a vertical position in which the push-in or pull-out device 16 can engage within the corresponding receiving space 5 for the roll 2. The handling illustrated in FIG. 9 can be used in rolling stands and roll maintenance areas.

[0041] The proposed concept can be supplemented by the following configuration that allows for improved tracking of individual rolls: namely,

[0042] Roll tracking during automated loading of the cassette 4 is possible in the roll maintenance area. Each roll 2 is provided with an identification element, for example a radio frequency identification chip (RFID-Chip) for this purpose. This chip is read during loading of the cassette 4 by using a suitable reading device in the loading unit in the roll maintenance area. In addition, each cassette 4 is provided with such an identification element, for example a radio frequency identification chip. Along with this, it is guaranteed that each roll 2 and the position of these rolls within the exchange cassette 4 are known.

[0043] The roll changing vehicle 3 is likewise provided with a reading device for detecting this cassette 4 at the stop position of the cassette 4. Along with this, it is known which roll 2 is located at which position and which position this roll 2 will occupy within the stand after roll change.

[0044] Roll selection can be carried out by connection to a Roll-Shop-Management-System, which is provided with data or information, for example, of a Digital-Maintenance-System (a system for the management of maintenance measures). In this way, each cassette 4 can be configured and mounted situationally according to each production plan.

[0045] Within the cassette 4, it is likewise possible to accommodate only a small number (at least two) of rolls, while at the same time configuring the cassette 4 for the accommodation of a complete set of rolls in the case of a four-high rolling stand or a six-high rolling stand. It should be noted that this application relates to the invention described in the claims, but may also include the following as other aspects. 1. A roll changing device (1) for changing a work roll and / or an intermediate roll (2) of a rolling stand, wherein the roll changing device (1) comprises a roll changing vehicle (3), and the roll (2) to be attached or removed for replacement can be transported by the roll changing vehicle. In the above roll changing device, the roll changing device (1) comprises at least one cassette (4), the cassette can be detachably arranged in the roll changing vehicle (3), the cassette (4) comprises an accommodation space (5) for the roll (2), characterized by the device. 2. The roll changing device according to 1 above, characterized in that the cassette (4) has a plurality of accommodation spaces (5) arranged overlapping each other for the roll (2). 3. The roll changing device according to 1 or 2 above, characterized in that the cassette (4) comprises a load hooking means (6) for engaging a crane hook. 4. The cassette (4) consists of two basic structural members, that is, a base body (7) having the accommodation space (5) for the roll (2) and a crane cross member (8) that can be detachably coupled to the base body (7), characterized by the roll changing device according to any one of 1 to 3 above. 5. The roll changing device according to claim 4, characterized in that the crane cross member (8) is provided with a load hooking means (6) for engagement of a crane hook. 6. When the base body (7) and the crane cross member (8) are coupled to each other, the roll changing device according to claim 4 or 5, characterized in that the crane cross member (8) surrounds the base body (7) at least in a part of the outside (9) of the base body (7). 7. The roll changing device according to claim 6, characterized in that the crane cross member (8) has a plurality of struts (10, 11, 12) extending in the vertical direction. 8. The roll changing device according to claim 7, characterized in that the crane cross member (8) has the struts (10, 11, 12) extending in the vertical direction, the number of which is between four and eight, preferably six. 9. The base body (7) has a longitudinal extension (L), which corresponds to the axis of the accommodated roll (2), when the base body (7) and the crane cross member (8) are coupled to each other, at least one strut (10, 12) is arranged in the axial end regions (13, 14) of the base body (7) with respect to the longitudinal extension (L) for each of them, the roll changing device according to claim 7 or 8. 10. The roll changing device according to any one of claims 1 to 9, characterized in that the roll changing device is a component of a cold plate rolling mill or a hot plate rolling mill.

Explanation of Symbols

[0046] 1 Roll changing device 2 Work roll / Intermediate roll 3 Roll changing vehicle 4 Cassette 5 Storage space for rolls 6 Lug engaging means 7 Basic body of the cassette 8 Crane cross member of the cassette 9 Outside of the basic body 10 Support column 11 Support column 12 Support column 13 Axial end region of the basic body 14 Axial end region of the basic body 15 Protection hood 16 Pushing / pulling device 17 Lifting device L Extending in the longitudinal direction of the basic body V Vertical direction

Claims

1. A roll changing device (1) for changing a work roll and / or an intermediate roll (2) of a rolling stand, wherein the roll changing device (1) comprises a roll changing vehicle (3), by means of which the roll (2) to be attached or removed for replacement can be transported, the roll changing device (1) comprises at least one cassette (4), and the cassette (4) comprises a receiving space (5) for the roll (2). In the above roll changing device, the cassette can be detachably arranged in the roll changing vehicle (3), the cassette (4) comprises a load hooking means (6) for engagement of a crane hook, and the cassette (4) consists of two basic structural members, i.e., a basic body (7) having the receiving space (5) for the roll (2) and a crane cross member (8) that can be detachably coupled to the basic body (7), when the basic body (7) and the crane cross member (8) are coupled to each other, the crane cross member (8) surrounds the basic body (7) at least in a part of the outside (9) of the basic body (7), the crane cross member (8) has a plurality of struts (10, 11, 12) extending in the vertical direction, and the basic body (7) has a longitudinal extension (L) corresponding to the axis of the received roll (2), and when the basic body (7) and the crane cross member (8) are coupled to each other, at least one strut (10, 12) is arranged in the axial end regions (13, 14) of the basic body (7) with respect to the longitudinal extension (L). A device characterized by the above.

2. The roll changing device according to claim 1, characterized in that the cassette (4) has a plurality of receiving spaces (5) arranged overlapping each other for the roll (2).

3. The roll changing device according to claim (1) or (2), characterized in that the crane cross member (8) comprises a load hooking means (6) for engagement of a crane hook.

4. The roll changing device according to claim 1, characterized in that the crane cross member (8) has between four and eight, preferably six, vertically extending struts (10, 11, 12).

5. The roll changing device according to claim 1 or 2, characterized in that the roll changing device is a component of a cold plate rolling mill or a hot plate rolling mill.

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