EP1732715B1 - Method for the insertion of machine units into a production line - Google Patents

Abstract

The invention relates to a method for assembling and/or starting machine units in installations, such as machine beds (1) and/or roll stands (2), e.g. in an existing production line of a hot-rolling mill. In order to minimize especially the downtimes during assembly, the machine bed (1) is prefabricated and the required or cooperating machine units are prefabricated and preassembled or assembled on site next to the production line (3), whereupon said machine units are inserted into the production line (3) as a complete structural unit including the bed block (1) and allocated driving members, control elements, fastening elements or similar, pipes and cables required for operation, and additional pieces of equipment.

Description

The invention relates to a method for assembling a machine unit according to the preamble of claim 1, see eg " SMS Demag NEWSLETTER ", Volume 9, No. 2, September 2002, p. 31 ,

So far, plant parts or machine units of rolling plants outside the production line are created on makeshift foundations and then moved with appropriate systems in the production line.

The foundations are created under difficult and time-consuming circumstances and usually have to be completed further after installation of the equipment or exchanged for the final foundations with a high level of construction work.

In some cases, the foundations were moved; The installation of the facilities was then but separately on the inserted foundation.

The document JP 63 03 01 07 A describes a roll stand with a special design to simplify a roll offset device by installing scaffolding rails and roller rails on the same horizontal plane.

The document JP 59 04 50 10 A discloses a method and apparatus for replacing stands of a rolling mill. Here is the disposition gap between the scaffolds and at the same time the overall length of the production line is shortened by special offsetting of roll stand groups as well as by replacement of the stands.

The document JP 11 31 99 05 deals with the task of preventing the formation of wavy patterns on rolling stock and to avoid undue lowering of the rolling temperature.

For this purpose, a device is proposed, in which a frame is provided with a base support on the floor level, and with a pressure-control-carrier, an inlet-side strain gauge, a middle strain gauge and an outlet-side strain gauge and an offset - measuring rod is provided. Caseless rolling units are integrated into the frame and connected to an outlet-side strain gauge, a connecting bolt and a stopper for increased strength. During a maintenance period, a displacement device and a moving device for the finishing roller units are advanced against the inlet-side direction by a moving cylinder, whereby the intervals between the moving devices are increased.

The document OS 2 018 383 describes a rolling mill, in particular for the deformation of a casting strand issuing directly from a continuous casting plant, as well as the associated rolling mill plant. Because of the separate construction of the rolling stands, the aim is to repair and maintain the stands far from the casting operation and to install ready-assembled rolling stands and gear parts as quickly and easily as possible. For this purpose, the rolling stand with a part of its transmission from the foundation frame or the foundation plate is releasably designed and removable in the vertical direction of this or this.

The document OS 2 018 490 relates to a roll stand for deforming a cast strand issuing from a continuous casting plant, with two roll stands, in which a horizontally arranged pair of rollers with its chocks is arranged vertically displaceable, wherein the roll stand below a rigid cross-connection and above a detachable cap connection and the mill stand is detachably connected to a foundation plate.

In continuous casting plants, there is a problem in that the rolling stands, with which the strands are further deformed following the casting process, are arranged as space-saving as possible. It is endeavored to arrange the rolling stands as close to each other as possible, so that the small and arranged above the continuous casting mold distribution vessel and the temperature loss of the liquid steel can be kept as low as possible. It is also necessary to arrange the rolling stands as close to one another as possible. Due to the low casting speed in continuous casting, the feed rate of the strand in the rolling stands is much smaller than in conventional rolling mills, which would set at a large distance de r rolling stands an undesirably high temperature loss.

Due to the compact design of the rolling stands, the roll change involves great difficulties and requires a considerable amount of time and involves risks for the executing personnel. Since rolling mills can not work independently of casting and smelting following continuous casting, a roll change or replacement of the rolling mills must take place as soon as possible during the changeover of the rolling program and in repair cases in order to avoid repercussions on the metallurgical plants. For this purpose, a gear enclosed in a housing is provided on each roller shaft and can be detached from the roller shafts. The gears interact with a vertical drive shaft driven from the bottom common drive shaft, wherein after releasing the rolling stand of the foundation plate this is vertically raised and lowered as a unit including the transmission and the drive shaft and thus the drive shaft with the arranged drive solvable or is connectable.

The document JP 58 09 03 05 A describes a method and apparatus for replacing stands for a rolling mill. To improve the efficiency of the entire apparatus, scaffold placement frames are arranged on the side of a scaffold chain and provided with two drive devices of different stroke length. Also, horizontal moving means are disposed on the sides of the new and old scaffolding on both sides of the frame.

The document JP 62 14 48 10 A describes a construction which serves the purpose of reducing the number of stands to be kept standing and of using the rolling stands in the unmodified state for a stand change, and of replacing only the other stands which are not used as they are can. The document JP 01 02 24 10 A describes a measure to reduce the number of scaffolds to be kept and to reduce the time required for their replacement by selective replacement of only those scaffolding required for rebuilding the rolls.

From the company magazine " SMS Demag NEWSLETTER ", Volume 9, No. 2, September 2002, page 31 , It is known to create next to a rolling mill a scaffold foundation plate on which rolling mills are pre-assembled. This unit with a weight of around 2,500 t is then pushed hydraulically into the rolling line. The foundations for the roll changing equipment are prepared in advance as precast reinforced concrete parts in order to minimize the impact on rolling operations.

Based on the aforementioned prior art, the present invention seeks to provide a method for assembling and / or commissioning of machine units in plants, resulting in significant savings through shorter installation times and shorter installation monitoring times during assembly, thereby reducing downtime and to minimize the risk of construction work in the direct production rolling area.

To solve a method with the features of claim 1 is proposed in combination.

In one embodiment of the invention, a statically determined storage of the foundation block on at least two axes or Verschubbahnen is provided for the Verschub. The shunting tracks are produced on, for example, pile foundations by gauging and pouring mortar absolutely straight, flat and parallel to one another before the actual foundation block is produced. Accuracy requirements of +/- 1 mm based on a foundation block width of, for example, 7.34 m are maintained.

The displacement track has along the entire length, which includes both the production line as well as the parallel waiting line and is at least twice as long as the foundation block width, preferably the same width and thus offers the possibility of lifting the foundation block along the entire length with pressing, as for the first lift if necessary, to replace individual bearing pads or the stainless steel sheet sliding partner.

These bearing cushions on which the foundation block rests with the built-up machine elements for displacement, for example, are interconnected by means of frames and / or ropes and / or chains. You are so fed before the shift between the bottom of the foundation block and the top of the Verschubbahn and can be replaced as well. Bearing cushions and the various types of presses are available for replacement and replacement.

A planned duration of three working days for the shifting and the alignment is also sufficient for the incident in the production line. At technically possible Verschubgeschwindigkeiten of 10 - 20 m / h and a Verschubstrecke of about 10 m is to assume a pure Verschubzeit of 30 to 60 min.

With a relatively short displacement path with relatively short traction means, a greater deviation from the displacement axis or direction is extremely unlikely because of the absolutely horizontal position and therefore side guides are not provided. In the final position, a position alignment in the longitudinal and transverse directions is planned in any case by means of horizontal pressing. If necessary, these can also be used on the shifting track, with abutments against the retaining walls or the neighboring foundations. In the case of the sliding pairing provided with sliding resistances of 2 to max. 5% go out.

For the shift, for example, in steps of about 1 cm between the left Verschubachse and right Verschubachse changing the foundation with the finishing stands by means of pairwise communicating switched double press, wegkontrolliert, raised to a height of about 5 cm and after retraction of the slide and the bearings are drained in the same way.

In the end position, the foundation block on the plain bearings is first aligned horizontally using measuring marks in the rolling stand axes. Subsequently, then the vertical alignment, which is analogous to move up in the two Verschubachsen upwards.

After raising the transverse axis, the first step of the fine adjustment is carried out by the individually to be moved, communicating connected press pairs of the left or right side, each in a Verschubachse. Elevations between left and right must not exceed specified values, for example 2 mm.

After this first step of the height adjustment on the left and right Verschubachse the fine adjustment of the foundation is carried about a central axis by descending the paired presses left and right of the central axis.

Because of partial load relocations and elastic reaction of the foundation, the above-described stages of fine adjustment can be continued until the required accuracy is achieved.

Subsequently, the grouting with shrink-free grouting mortar, which can be charged after a few hours.

Leaving the presses in the foundation for subsequent height corrections does not appear under consideration of the above explanations, but is still possible with the precautions specified in the foundations after a certain period of time to be determined.

• größtmögliche Produktion während der Modernisierung
• minimale Störung der Produktionsabläufe
• maximale Sicherheit beim Wiederanwalzen
• Bauarbeiten erfolgen nicht im unmittelbaren Produktionsbereich
• minimale Stillstandszeiten,
  und ferner

The invention provides the following advantages:

• maximum production during modernization
• minimal disruption of production processes
• maximum safety during re-rolling
• Construction work does not take place in the immediate production area
• minimal downtimes,
  and further

• reguläre Arbeitszeiten des Montage- und Überwachungspersonals
• Einsatz von Modularen, vorgefertigten Maschinen- und Ausrüstungsteilen, passend für die Umbauphasen
• Verrohrung und Verkabelung an kompletten Maschinen/Fundamentblock

und schließlich
Fertigstellung der Fundamente im regulären Schichtbetrieb, somit geringe Störung der Produktion durch Bauarbeiten und damit auch Reduktion des Baupreises.Saving assembly costs at the supplier

• regular working hours of assembly and monitoring personnel
• Use of modular, prefabricated machine and equipment parts, suitable for the conversion phases
• Piping and wiring to complete machines / foundation block

and finally
Completion of the foundations in regular shift operation, thus little disruption of production by construction work and thus also reduction of the construction price.

An embodiment of the invention provides that a preliminary test run of the pre-assembled systems takes place on site before their insertion into the production line.

A further embodiment of the invention provides that the machine foundations are created in the assembly area of the base block to be moved partially or completely as reinforced concrete precast element to be used later as a foundation for new machine foundations.

And finally, a further embodiment of the method provides that the foundations of the roll change region are at least partially designed and installed as precast reinforced concrete components.

Figur 1

in perspektivischer Ansicht einen vorgefertigten Fundamentblock mit Fertiggerüsten vor dem Einschieben in die Walzlinie;

Figur 2

und weiter in perspektivischen Ansichten den Fundamentblocks mit den Fertiggerüsten in endgültiger Position ( in der Produktionslinie );

Figur 3

in Draufsicht die Verschubbahnen mit Hebepunkten / Hebeflächen;

Figur 4

in Draufsicht die Verschubbahnen mit Fundamentblock in der Warte- linie und

Figur 5

in Draufsicht die Verschubbahnen mit Fundamentblock in der Pro- duktionslinie.

Further features and details of the invention will become apparent from the claims and the following description of illustrated in very schematic drawings embodiments of the invention. Show it:

FIG. 1

in perspective view of a prefabricated foundation block with finished scaffolds before insertion into the rolling line;

FIG. 2

and further in perspective views the foundation blocks with finishing stands in final position (in the production line);

FIG. 3

in plan view, the Verschubbahnen with lifting points / lifting surfaces;

FIG. 4

in top view, the sliding tracks with foundation block in the waiting line and

FIG. 5

in plan view, the displacement tracks with foundation block in the production line.

In these figures, the numeral 1 designates a foundation block, the numeral 2 fully assembled rolling stands and the numeral 3 the course of a fictitious, waiting line. In order to minimize downtime and the danger of construction work in the direct production or rolling area are in accordance with FIG. 1 on a prefabricated foundation block 1 the finished scaffolds - in the present case there are three scaffolds - mounted and if necessary. Driven in trial operation. During these measures, the original production line 4 is operating undisturbed. The foundation block 1 lies on two parallel displacement paths 5, which preferably extend at right angles to the production line 4 and the waiting line 3 and are arranged in a gap 8. On the opposite side of the production line 4, an abutment 6 is provided. This can consist of an already existing part of the plant as well as be specially manufactured. On the back (not shown) of the abutment 6 provided for the Verschub traction devices are arranged, which are connected via traction means 7 (not shown) with the foundation block.

FIG. 2 shows that after completion of the prefabrication and / or pre-assembly or final assembly of the now operational scaffolds 2, the foundation block 1 is inserted with the frameworks 2 in the production line 4 and the scaffolding are integrated immediately into the production process.

In FIG. 3 are the Verschubbahnen 5, which are arranged in a gap 8 of the existing system, shown in plan view. While in the waiting line 3 on the Verschubbahnen 5 each two lifting points / lifting surfaces 9 are provided for the alignment of the foundation block 1 in the production line 4 next to the lifting points / lifting surfaces 10, two more lifting points / lifting surfaces 11 are installed on the central axis 12 of the foundation block 1. The lifting points / lifting surfaces 9, 10, 11 can also be doubled if necessary to distribute the load more evenly. As lifting points / lifting surfaces 9, 10, 11, for example, steel plates of size 500 x 500 x 80 are installed.

The foundation 1 with the uprights 2 is then, as in FIG. 4 shown in plan view, created in the waiting line 3 or, set up. About traction means 7, the displacement takes place in the production line 4, wherein the traction devices 13 are supported on an abutment 6.

After reaching the final position, as in FIG. 5 illustrated, the foundation block 1 is aligned with the uprights 2 horizontally by means of presses 14, 15. Subsequently, the foundation block 1 is raised, the sliding bearing removed and drained / lowered and vertically aligned. Subsequently, the gap 8 is formed, for example, as a roll change region. In this case, the launching tracks with the foundations can be used as foundations for new machine foundations. Individual parts or components can be manufactured from precast reinforced concrete parts.

LIST OF REFERENCE NUMBERS

1

machine foundation

2

rolling mills

3

waiting line

4

production line

5

displacement tracks

6

abutment

7

traction means

8th

gap

9

Lifting point / lifting surface

10

Lifting point / lifting surface

11

Lifting point / lifting surface

12

central axis

13

hitch

14

Press

15

Press

Claims (13)

1. Method of installing a machine unit, comprising the following steps:

   prefabricating a machine foundation (1);

   installing the machine unit, comprising the machine foundation (1) and a rolling stand (2) mounted thereon, on site near an existing production line (3); and

   pushing this machine unit as a subassembly into the production line (3);

   characterised in that the step of installing comprises setting up the machine unit as a complete subassembly inclusive of the associated drive elements, control elements,

   fastening elements and the pipeworks and cablings as well as further equipment parts necessary for operation; and that a preliminary test run of the installed machine unit as a complete subassembly is carried out before being pushed into the production line (3).
2. Method according to claim 1, characterised in that the pushing in of the machine foundation (1) with the completely assembled and operationally ready rolling stand (2) is carried out on at least two displacement tracks (5).
3. Method according to claim 2, characterised in that the displacement is carried out in steps in alternation between lefthand displacement axis and righthand displacement axis.
4. Method according to any one of claims 1 to 3, characterised in that the machine foundation (1) to be displaced is raised, slideways are inserted between machine foundation (1) and displacement tracks (5) and the machine foundation (1) is displaced and subsequently let down in a final position.
5. Method according to claim 4, characterised in that double presses connected to communicate in pairs are used for raising and lowering the machine foundation (1).
6. Method according to claim 5, characterised in that the presses for raising the machine foundation (1) are supported on lifting points or lifting surfaces (9, 10, 11) embedded in the displacement tracks (5).
7. Method according to claim 5, characterised in that the presses for letting down the machine foundation (1) in the final position are supported on lifting points or lifting surfaces embedded in the displacement tracks (5).
8. Method according to claim 4, characterised in that the machine foundation (1) is horizontally aligned in the final position on the basis of measuring marks in the rolling stand axes.
9. Method according to claim 4 or claim 8, characterised in that the machine foundation (1) is vertically aligned in the final position on the basis of measurement marks.
10. Method according to claim 4, 8 or 9, characterised in that the machine foundation (1) is finely adjusted about its traverse axis.
11. Method according to claim 1 or 2, characterised in that the foundations of the roll-changing area are constructed and installed at least partly as prefabricated reinforced concrete structures.
12. Method according to any one of the preceding claims, characterised in that the intermediate space (8) is completely or partially filled with ready-mix concrete.
13. Method according to claim 1, characterised in that the machine foundations are set up partly or completely as prefabricated reinforced concrete structural elements in the assembly area of the machine foundation (1) to be displaced so as to be used later as a base for new machine foundations.

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