EP0329998A2 - Rolling train, especially one in a section-rolling mill - Google Patents

Abstract

In order to largely mechanize and automate the change of rollers and fittings in a stand group (4) of a rolling mill, in particular a rolling train in a section steel rolling mill, it is proposed that a stand group (4) consisting of several rolling stands (1, 2, 3) Preferably, every second roll stand (1) from the rolling line (16) is designed to be displaceable, movable or displaceable by at least the width of the guide armature (10) in order to make the guide armatures arranged in a narrow distance from one another more easily accessible for replacement and also to make them easier to change To be able to exchange roller sets of the individual roll stands more quickly.

Description

The invention relates to a rolling mill, in particular a rolling mill in a shaped steel rolling mill with at least one stand group consisting of n stands in a group, the stand having at least horizontal guide fittings which are arranged at least on the middle stands in a rolling line with a close spacing from one another. The invention also relates to a method for controlling the stand change in said rolling mill

The overall technical concept for the economic efficiency of the rolling mill is decisive for the rational production of steel profiles of different shapes and sizes in combined shaped steel rolling mills, in particular largely mechanized change systems for the roll stand, rolls and roll stand fittings are decisive for an inexpensive adaptation of the rolling train to different rolling programs with different lot sizes .

In order to create the prerequisites for maximum possible times of use for a rolling mill, it has already been proposed to move complete rolling stands over sliding platforms with the aid of quick-release couplings from the rolling mill to separate building sites and to replace them with rolling stands adapted to the respective rolling program, which were prepared on the site and be driven over the transfer platforms into the rolling mill. The use of interchangeable stands also allows rolling systems to follow one another as required. These measures make it possible to switch from one universal program to another or from universal rolling mill to duo rolling mill or vice versa. The time required for a quick program change could be reduced considerably. The disadvantage of the interchangeable stands is the high investment costs and the need to have a large number of susceptible media and electrical couplings.

From EP-PS 2047 it is also known to move even heavy roll stands quickly and with little structural effort over long travels when changing stands, for which purpose the roll stand has its own drive, which is geared to rollers on which the stand directly along traverse paths the rolling line or is movable from this.

In order to adapt the roll stands to different rolling programs, it is also known to move complete roll sets out of the roll stands, which are stationary in a rolling train, across the rolling path. For this purpose, the fittings guiding the rolling stock are dismantled. This is done with the help of the hall or auxiliary cranes. However, the disassembly, assembly and that Aligning the fittings takes a lot of time and personnel. Not least because access to the fittings is very difficult due to the limited space available.

The object of the present invention is to be able to adapt a rolling mill of the type mentioned at the outset to the various rolling programs even more efficiently, primarily by means of extensive mechanization of the roll change and change of fittings on the roll stand, in order to reduce the time and manpower required for the staff when changing the roll To reduce the risk potential and to do without interchangeable scaffolding.

This object is achieved in that every second roll stand from the rolling line is designed to be displaceable, movable or displaceable at least by the width of the guide fitting from the stand for the purpose of changing the guide fittings and / or the rollers; the adjacent roll stands can be arranged in a stationary manner in the rolling line. For example, from a group of scaffolds consisting of three roll stands, the middle stand is shifted to the operating side to such an extent that sufficient assembly space is created to remove the guide fittings from the roll stands or to mount new guide fittings on the roll stands. It is expedient that, in the case of a reversing tandem scaffolding group consisting of a universal scaffold, upsetting scaffold and universal scaffolding, the upsetting scaffold is designed to be displaceable at least half the width of the universal scaffolding on the operating side. Here, the smallest scaffold, the compression scaffold from a scaffold group with two heavy universal scaffolds, is also only moved to the operating side as far as the limited space between the two heavy duty universal scaffolds make this necessary. As soon as the compression frame has reached a sliding position that is outside the half width of the universal frame, the compression frame is easily accessible from all sides and the guide fittings can be changed quickly and easily. By moving the upsetting stand out of the rolling line, a space is created between the universal stands, in which assembly and disassembly devices can be used in such a way that the guide fittings of the universal stands can be replaced quickly and inexpensively.

In an advantageous embodiment of the invention it is provided that the compression frame can be moved from the rolling line to the operating side on rollers having its own drive. In this way, the displacement path of the roll stand can be traversed quickly without the need for special displacement rods or displacement hydraulics. It is expedient that the chocks of the roll stands, which support the horizontal rolls, can be displaced from the compression stand or from the universal stand on rollers having their own drive. As soon as the guide fittings have been removed from the roll stand, the rolls stored in the chocks can be moved from the roll stands to a separate construction site without great expenditure on equipment. To set up a new rolling program, new rolls can be inserted and set in the roll stands just as quickly and easily. In the mutually offset assembly position of the roll stands, new or adapted guide fittings can be mounted quickly and easily. It becomes clear that through these measures, the assembly effort is reduced considerably and that expensive interchangeable scaffolding can be dispensed with.

To further mechanize the change of fittings in a scaffolding group, it is proposed that the compression scaffold have at least one movable assembly platform on the drive side. It is expedient that the assembly platform has a platform length in the rolling line which corresponds approximately to the distance between the universal stands and that the platform width corresponds approximately to the displacement path of the compression frame. This measure allows the pulling of the guide fittings from both universal stands from an assembly platform, since the assembly platform is inserted between the universal stands to the extent that the compression stand is moved out of the rolling line. The assembly of the new guide fittings on the universal scaffolding is also carried out in a particularly favorable manner from the assembly platform. Furthermore, it is expedient that a stationary working platform is arranged on both sides of the displaced upsetting frame on the operating side, so that the removal of the guide fittings from the upsetting frame and the fitting of the upsetting frame with new fittings can take place in a particularly favorable manner, at the same time, for which the fittings are changed on the universal scaffolding.

In a particularly advantageous embodiment of the invention, it is provided that the assembly platform and the working platform have at least one set-up, consisting of at least one guide fitting pre-assembled in a stand and a preferably adjacent empty stand. This measure means that the time for changing the fittings is again reduced shortens, especially if the guide fittings are pre-assembled on the assembly platform. Without hall or auxiliary cranes, the guide armatures on the assembly or working platform can be dismantled with the help of the empty stand and immediately afterwards the pre-assembled guide armature can be inserted into the rolling stand, the empty stand being designed, for example, as a movable carriage.

A further rationalization of the change of fittings in a group of rolling stands is achieved in that, on the assembly platform and on the work platform, preferably automatically operable pulling devices or assembly devices for the guide fittings are arranged, so that the use of personnel in the safety-threatening zones can be considerably restricted .

For a special development of the invention, it is proposed that the upsetting stand be connected to at least one position transmitter which limits the displacement path in such a way that the empty stand on the assembly platform is the guide armatures of the universal stand and that the empty stand on the working platform can be fed to the guide fittings of the edging stand approximately in the center. This enables extensive automation of the scaffolding change or the change of fittings, as the automatic program control can be used to initiate the shifting of the upsetting stand from the rolling line and the position transmitter ends exactly where the dismantling of the guide fittings on the work platform or assembly platform is carried out using the automatically working puller is to take place. For the same reasons, it is expedient that the compression frame with little at least one position encoder limiting the displacement path is connected in such a way that the guide fitting pre-assembled on the assembly platform can be fed to the universal stand in the rolling line and the guide fitting pre-assembled on the work platform can be brought to the compression stand approximately in the middle.

The method for controlling the stand change in a rolling mill is characterized according to the invention in that the upsetting stand is moved step by step from the rolling line and that the position transmitter is first actuated for the empty stand position for the purpose of dismantling the guide fittings from the roll stands and that the position transmitter is then actuated for the preassembly position for the purpose of installing the preassembled guide fitting on the roll stands before the upsetting stand is moved back into the rolling line. By means of a unified program control and with the help of the position transmitter, which can be designed as a limit switch or as a contact-free contact transmitter, the valve exchange can be largely automated in a scaffold group, e.g. in a universal carrier line, so that the time required for changing the guide valve in the scaffolding from usually one hour to about ten minutes.

In a further embodiment of the control method, it is proposed that the position transmitter for the empty stand position releases the lock for the rollers of the roll stands stored in the chocks and the position transmitter for the preassembly position closes the lock. In this way, a fully automatic changing system for the rollers and for the guide fittings in a stand group is created, in particular in connection with driven chocks, whose hydraulic drives, for example, are switched on or stopped depending on the locking of the chocks in the rolling stands.

• Figur 1 eine Walzgerüstgruppe einer Universal-Träger­straße mit in Walzlinie angeordnetem Universal­gerüst, mittlerem verschobenen Stauchgerüst und nachfolgendem Universalgerüst, mit ein- bzw. aus gefahrenen Führungsarmaturen, teilweise im Schnitt,
• Figur 2 eine Draufsicht auf die Walzgerüstgruppe gemäß Fig. 1 mit Montagebühne und Arbeitsbühne für den Armaturenwechsel und mit Verschiebebühnen für die Gerüstwalzen, in verkleinerter Darstellung, und
• Figur 3 einen Schnitt durch das verschobene Stauchgerüst entlang der Linie III-III in Fig. 2 mit einer Ansicht auf die aus den Universalgerüsten gefah­renen Walzen.

The invention is explained in more detail using an exemplary embodiment. Show it:

• 1 shows a roll stand group of a universal carrier train with a universal stand arranged in the rolling line, a middle displaced compression stand and a subsequent universal stand, with guide fittings moved in and out, partly in section,
• 2 shows a plan view of the roll stand group according to FIG. 1 with a mounting platform and work platform for changing the fittings and with a transfer platform for the stand rollers, in a reduced representation, and
• 3 shows a section through the displaced upsetting stand along the line III-III in FIG. 2 with a view of the rollers moved out of the universal stands.

1 shows a stand group 4 consisting of a compression stand 1 and two universal stands 2, 3, which is arranged in a shaped steel rolling mill 5. The smaller compression frame 1 is arranged between the larger universal frames 2, 3. A roller conveyor 6 which transports the rolling stock, for example a T-shaped support, is arranged on both sides of the universal stands 2, 3.

In the respective roll stands 7 of the stand group 4, the horizontal rolls 9 are stored in chocks 8. In the area of the roll gap between the horizontal rolls, the guide fittings 10 guiding the rolling stock are arranged. The chocks 8 carrying the horizontal rollers are mounted on rollers 11 which have their own drive, the drive e.g. can be a commercially available hydraulic wheel hub drive. The upsetting frame 1 and the universal frames 2, 3 are of the same type with regard to these components, which is why the same reference numbers should apply to these components.

The compression frame 1 is mounted on support rollers 12 which have their own drive. This roller drive, like the roller drive on the chocks 8, can consist of a commercially available hydraulic wheel hub drive. The upsetting frame 1 and the universal frames 2, 3 are arranged on sole plates 13, which in turn are connected to the foundation 14. The rolling stands within the stand group 4 are at such a short distance from one another that their guide fittings seem to touch in the rolling line in order to give the rolling stock an uninterrupted guidance. On the universal scaffold 3, the guide fittings 10 can be seen disassembled from the puller 15.

Fig. 2 shows a plan view of the scaffold group 4 consisting of universal scaffold 2, compression frame 1 and universal scaffold 3 in a reduced view. It can also be seen here that the guide fittings 10, seen in the rolling line 16, are at a very close distance from one another. The upsetting frame 1 has on the drive side 17 a mounting platform 18 which can preferably be moved together with the frame. In the rolling line 16, the assembly platform has a length L which corresponds approximately to the distance between the universal scaffolding 2, 3. The width B of the assembly platform corresponds approximately to the displacement path of the compression frame. The universal stands 2, 3 of the stand group 4 are arranged in a stationary manner in the rolling mill 5, while the upsetting stand 1 can be moved out of the rolling line 16 to the operating side 19. The shifted position of the compression frame is shown in Fig. 2 in dashed lines. It can be seen that the compression frame is displaced from the roller line by about half the width U of the universal frame 2. A work platform 18 'is located on both sides of the displaced compression frame 1'.

On the assembly platform 18, a respective set-up group 20 for the guide fittings 10 of the universal stands 2, 3 is installed opposite the respective universal stands 2, 3. The setup group 20 for the assembly and disassembly of the guide fittings 10 and their support 10 'consists of an empty scaffold 21 for a guide fitting (dashed lines) and a pre-assembled guide fitting 22. On the work platform 18', a setup group 23 is arranged , which contains a guide fitting 24 pre-assembled in a frame for the compression frame 1 and a corresponding secondary empty frame 25. Following the work platform 18 ', a site 26 is set up on which the roller sets 27, 28 for the universal stands 2, 3 and the roller set 29 for the upsetting stand 1 are prepared. The roller sets 27, 28, 29 of the stand group are displaced from the roll stands on a sliding platform provided with rails 30 to the site 26 or transported from the site 26 to the roll stands. The displacement of the rollers sets are made with the help of own roller drives 11.

If the compression stand 1 is now moved from the rolling line 16 to the operating side 19 by means of the position transmitter 31 by half the width U of the universal stand 2 into the position shown in dashed lines in FIG. 2, then the empty stands 21 stand on the assembly platform 18 in the longitudinal direction of the guide fittings 11 the universal stands 2, 3 and the empty stand 25 on the work platform 18 'is in the longitudinal direction to the guide fittings 10 of the upsetting frame 1. With the aid of the preferably automatically operated pulling devices 15, the guide fittings from the universal stands and, at the same time, the guide fittings, can be moved out of this position of the upsetting frame the edger are removed and placed on the assembly platform 18 or on the work platform 18 '. The shifted assembly position of the compression frame 1 is shown in Fig. 3. From the pullers 15 and assembly devices 15, the guide fittings 10 on the work platform 18 'disassembled or mounted on the chocks 8 can be seen. The rollers 9 of the universal stands 2, 3 can be moved along the work platform with the aid of the roller drive 11.

If the roller sets 27, 28, 29 of the entire stand group 4 are to be changed, the position sensor 31 can release the lock, not shown in more detail, for the rollers of the roll stands stored in the chocks 8, so that the roller sets can be opened by means of the driven rollers 11 the rails 30 of the transfer platform can be moved to the site 26. From the building site 26, the new roller sets assigned to the respective roll stands are moved into the roll stands on the rails 30 of the transfer platform and adjusted there in a known manner. Subsequently, the upsetting frame is moved with the aid of the idler roller drive 12 into a new mounting position, which is controlled by the position transmitter 32 so that the guide fitting 22 preassembled on the mounting platform 18 is brought approximately centrally to the universal stands 2, 3 and at the same time that on the working platform 18 'pre-assembled guide fitting 24 is approximately in the middle in front of the rollers of the compression frame. In this assembly position of the upsetting frame, the preassembled guide fittings 22, 24 are connected to the upsetting frame 1 or to the universal stands 2, 3 with the aid of the automatically operated assembly devices 15. At the same time, the respective locking of the roller sets in the roll stands can be controlled by the position transmitter 32. Then the upsetting stand 1 is moved from the operating side 19 back into the rolling line 16, so that the entire stand group is set up to roll a rolled product with a changed profile shape. With the measures described above for the extensive mechanization and automation of the roll and valve change in a stand group in a shaped steel rolling mill, it is possible to reduce the time and manpower required for the disassembly, assembly and alignment of the valves and for the roll change to reduce the individual scaffolding to a fraction of the previously known effort.

Reference symbol list

• 1 compression frame
• 2 universal scaffolding
• 3 universal scaffolding
• 4 scaffolding group
• 5 rolling mill
• 6 roller table
• 7 roll stand
• 8 chock
• 9 horizontal rollers
• 10 guide fitting
• 10'bearer of the guide fitting
• 11 roller drive
• 12 idler roller drive
• 13 sole plate
• 14 foundation
• 15 puller or assembly device
• 16 rolling line
• 17 drive side
• 18 assembly platform
• 18 ′ working platform
• 19 Operating side
• 20 setup group
• 21 Empty scaffolding for universal scaffolding
• 22 Pre-assembled guide fitting for universal scaffolding
• 23 setup group
• 24 Preassembled guide fitting for compression frame
• 25 Empty frame for upsetting frame
• 26 construction site
• 27 Roller set for universal scaffolding
• 28 Roller set for universal scaffolding
• 29 Roller set for upsetting stand
• 30 rail of the transfer platform
• 31 position transmitter
• 32 position sensors

Claims (15)

1. rolling mill, in particular a rolling mill in a shaped steel rolling mill with at least one stand group consisting of n stands in one group, the stand having at least horizontal guide fittings which are arranged at least on the middle stands in a rolling line with a narrow spacing from one another,
characterized,
that from the stand group (4) preferably every second roll stand (1) from the rolling line (16) for the purpose of changing the guide fittings (10) and / or the rollers (9) at least by the width of the guide fitting (10) displaceable, movable or is designed to be displaceable. 2. rolling mill according to claim 1,
characterized,
that in a reversing tandem scaffold group consisting of a universal scaffold (2), upsetting scaffold (1) and universal scaffolding (3), the upsetting scaffold (1) is designed to be displaceable by at least half the width (U) of the universal scaffolding (2, 3) to the operating side (19) . 3. rolling mill according to claim 1 or 2,
characterized,
that the upsetting frame (1) can be displaced on its own drive rollers (12) from the rolling line (16) to the operating side (19). 4. Roll stand according to at least one of claims 1 to 3,
characterized,
that the chocks (8) of the roll stands (3) carrying the horizontal rolls (9) can be moved from the compression stand (1) or from the universal stand (2, 3) to their own drive (11). 5. rolling mill according to at least one of claims 1 to 4,
characterized,
that the compression frame (1) has at least one movable assembly platform (18) on the drive side (17). 6. rolling mill according to at least one of claims 1 to 5,
characterized,
that the assembly platform (18) in the rolling line (16) has a platform length (L) which corresponds approximately to the distance between the universal frames (2, 3) and that the platform width (B) approximately corresponds to the displacement path of the compression frame (1). 7. rolling mill according to at least one of claims 1 to 6,
characterized,
that a fixed working platform (18 ') is arranged on both sides of the displaced compression frame (1) on the operating side (19). 8. rolling mill according to at least one of claims 1 to 7,
characterized,
that the assembly platform (18) and the working platform (18 ') have at least one set-up group (20, 23) consisting of at least one guide fitting (22, 24) preassembled in a stand and a preferably adjacent empty stand (21, 25). 9. rolling mill according to at least one of claims 1 to 8,
characterized,
that the setup group (20) on the assembly platform (18) the preassembled guide fitting (22) for the universal scaffold (2, 3) and the setup group (23) on the work platform (18 ') the preassembled guide fitting (24) for the edging stand (1 ) contains. 10. rolling mill according to at least one of the preceding claims,
characterized,
that on the assembly platform (18) and on the work platform (18 ') preferably automatically operated pullers or assembly devices (15) for the guide fittings (10, 22, 24) are arranged. 11. Rolling mill according to at least one of the preceding claims,
characterized,
that the upsetting frame (1) is connected to at least one position transmitter (31) that limits the displacement path so that the empty frame (21) on the assembly platform (18) guides the armatures (10) of the universal frame stes (2, 3) and the empty scaffold (25) on the work platform (18 ') the guide fittings (10) of the compression scaffold (1) can be brought approximately in the middle. 12. Rolling mill according to at least one of the preceding claims,
characterized,
that the compression frame (1) is connected to at least one position transmitter (32) that limits the displacement path so that the guide fitting (22) preassembled on the assembly platform (18), the universal frame (2, 3) in the rolling line and that on the work platform (18 ') Preassembled guide fitting (24) the compression frame (1) can be brought about in the middle. 13. Rolling mill according to at least one of the preceding claims,
characterized,
that the position sensors (31, 32) are connected to the locking device for the rollers (9) of the roll stands which are mounted in the chocks (8). 14. A method for controlling the stand change in a rolling mill according to at least one of claims 1 to 13, in particular according to claims 11 and 12,
characterized,
that the upsetting stand (1) is moved step by step from the rolling line (16) and that first the position transmitter (31) is actuated for the empty stand position for the purpose of dismantling the guide fittings (10) from the rolling stands and then the position transmitter (32) is actuated for the pre-assembly position for the assembly of the pre-assembly th guide fittings (22, 24) on the rolling stands before the upsetting stand (1) is moved back into the rolling line (16). 15. The method according to claim 14,
characterized,
that the position transmitter (31) for the empty stand position releases the lock for the rollers (9) of the roll stands stored in the chocks (8) and the position transmitter (32) closes the lock for the preassembly position.

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