EP0566910B1 - Device for transporting rolled stock wound in rings in the coiling area - Google Patents

Abstract

In a device for delivering rolled stock wound into rings, in particular wire from a reel, and for transferring the rings 15 of rolled stock to delivery-side conveying devices 4, the reels 2, 3 and the conveying devices 4 being components of a single- or multi-strand rolling train for wire, light sections or medium sections, which consists essentially of a furnace system for the rolling stock employed and of a roughing train, intermediate train and, if required, a finishing train for the rolled stock, it is proposed that the delivery and transfer device 1 be provided with a supporting pallet 25, which can be pivoted like a carousel and can be raised and moved horizontally, for the wound rings 15 of rolled stock and that one or more reels 2, 3 and one or more conveying devices 4 be arranged in the peripheral region 5 of the pivoting movement of the supporting pallet 25. <IMAGE>

Description

The invention relates to a device for discharging rolled material rolled into rings, in particular wire from a reel and for transferring the rolled material rings to downstream transport devices, the reel and transport devices being system components of a single or multi-core rolling train for wire, fine steel or medium steel from a furnace system for the rolling material used as well as a roughing train, intermediate train and, if necessary, finishing train for the rolling stock and wherein the discharge and transfer device is provided with a carousel-like pivotable and liftable and horizontally movable carrying pallet for the wound rolled material rings, and one or more reels and one or more transport device (s) are arranged in the peripheral region of the pivoting of the carrying pallet.

Rolling mills for wire, fine steel or medium steel consist of a number of high-quality system components. A single or multi-wire wire mill consists, for example, of a support grid for the rolling material used, mostly in the form of billets, and an oven in which the billets are heated to the rolling temperature. The billets come out of the furnace into a roughing train consisting of several rolling stands, in which swirl-free rolling is made possible. The stands of the roughing mill are equipped with roller load cells to better control the rolling of the difficult-to-deform qualities. The intermediate line following the roughing train also consists of several rolling stands, for example compact stands, which allow the use of rolling rings with a long service life. Of the A finishing train, which can consist of a ten-stand finishing block that is designed for maximum rolling speeds of up to 90 m / sec and above, is arranged downstream of the intermediate train. With the exception of the first two stands on the roughing mill, where box calibers are used, the rolling stock is only deformed into oval and round calibers. The average decreases are, for example, approximately 24% in the Vorstraße, approximately 23% in the Zwischenstraße and approximately 16% in the finished block. The average decrease in the rolling of rolling stock with a round diameter of, for example, 5.5 mm from 120 mm ² is 21%. The rolled material rolled into a round cross-section is wound into rings in Garrett reels. The rolling stock rings are transported from the reel to a transport device and from there to a hook track where the rolling stock is further cooled. The rolling stock rings are then dispatched.

A wire reel with a dispensing device for the reeled rolled material ring is known from DE 37 23 461 A1. The wire reel has a collar lifting plate which can be moved up and down in the direction of the central axis of the reel basket with the aid of a central lifting rod. With the help of the coil lifting plate, the rolled material wound into a ring or coil is raised so far that it can be brought out of the reel basket.

After a measure carried out in practice, the rolling stock ring is pushed off the raised coil lifting plate of the reel in steps onto a ring conveyor belt. Several different devices are required to discharge and transfer the wound rings from two reels onto a ring conveyor belt. For example, two pairs of pushers to transport the rings from the middle of the reel to the middle of the intermediate station, two pairs of pushers to transport the rings from the middle of the reel to the middle of the ring conveyor belt, a lifting table in the area of the ring conveyor belt, a special plate covering in the area between the reel and ring conveyor belt for low-damage transport of the turns below of a ring. The disadvantage of pushing wound rings onto a ring conveyor belt is that several separate devices are required (pushers, lifting tables, special plate coverings). Damage to the surface of the windings lying below during pushing off can also occur due to rough or damaged surfaces of the plate covering or due to plate curvature due to the effect of temperature after a long production time in the transport area of the rings. Furthermore, individual windings or rod tips can become trapped between the top edge of the plate covering and the bottom edge of the pusher, especially with thin round material. Since four pushers interlock in their movement, there is a risk of collision in the event of electrical fault control.

According to another measure carried out in practice, the rolling stock ring is discharged from the raised lifting plate of the reel in steps by means of walking beams and lifting tables onto a ring conveyor belt. Several different devices are required to discharge and transfer the wound rings from two reels onto a ring conveyor belt. E.g. two walking beam conveyors, consisting of a fixed grate and movable double support arms for the gradual transport of the rings from the center of the reel to the center of the fixed storage rack, from the center of the fixed storage rack to the center of the lifting table, which also corresponds to the center of the ring conveyor belt. So two lifting tables are required to take over and deposit the coiled rings from the walking beam onto the ring conveyor belt. The disadvantage of these known measures is that four devices are required with two reels (two walking beam conveyors, consisting of movable and fixed grates and two lifting tables). As a result of the multiple picking up and putting down of the wound rings, there is a risk of the rings overturning and thus possibly losing production due to scrap removal. Several devices which are in a transport function to one another form seams which cannot always be closed by covers or can be defused by baffles. This can lead to disruptions in the production process. Further surface damage to the rolling stock is possible. The reason for this is the relative movements of the turns below when they come into contact with the transport device due to frequent picking up and putting down of the rings during transport. The large number of transport devices in a confined space make maintenance more difficult, which leads to increased costs.

Finally, a measure is known from practice for discharging and conveying wound rings from a reel onto a ring conveyor belt by means of walking beams, stationary roller table pieces and a roller table piece that can be raised and lowered. To discharge and transfer the wound rings from two reels onto a ring conveyor belt, several different devices are required, namely two walking beam conveyors, consisting of a fixed grate and movable double support arms, for the gradual transport of the rings from the center of the reel to the center of the stationary roller table section. Furthermore, two stationary roller table pieces with driven rollers for conveying the rings in the middle of the lifting and lowering roller table piece. A lifting and lowering roller table piece with driven rollers for taking over and depositing the wound rings on the middle of the ring conveyor belt is also required. The disadvantage here is that several devices are required (two walking beam conveyors, consisting of fixed and movable grates, two stationary roller table pieces with driven rollers and a lifting and lowering roller table piece with driven rollers). As a result of the multiple picking up and putting down and due to the additional conveying of the wound rings, there is a risk of the rings overturning and, under certain circumstances, of production losses due to scrap removal. Several devices which are in a transport function to one another form seams which cannot always be closed by covers or can be defused by baffles. Faults in the production process can therefore not be excluded. Additional surface damage to the rolling stock can occur when conveying by means of the roller tables, since relative movements between the turns below and the transport rollers can occur, especially if the roller surfaces are damaged. In the case of thicker round rolling stock, transport problems on the roller tables can also occur in that the rod tip lying underneath of an already partially cooled ring hooks, for example on a roller, guide plate or roller table frame.

DE 1 294 907 A1 describes an out-of-date solution for the continuous depositing and transporting of drawn wire. The wire rings falling off one after the other from a drawing drum are deflected into an eccentric position by a deflector attached to the drawing drum and are collected by a rotating receiving basket which has a disk-shaped base plate and an upstanding central core around which the rings fall. The basket is located on a table that is rotatably mounted on the frame of a wheelbarrow by means of low-friction bearings. Such a storage and transport device for wire rings cannot be used in modern rolling mills with rolling speeds of 90 m / sec and more because of the obvious disadvantages.

DE 1 182 192 A1 shows a device for the continuous formation of wound wire rings and their transport, a rotary table for forming the bundle being arranged in a roller table. The wire coming from a hanging drawing block is wound on a platform around an upstanding cylindrical core. The platform is conveyed to the turntable on the roller table. When the bundle formation is complete, the platform is moved from the turntable to the further part of the roller table. Obviously, this winding and transport device for wire coils cannot be used in rolling mills with the currently high rolling speeds and high throughputs.

From DD 92 690, from which the present application is based in the preamble, a method and a device for transferring coil rings, in particular those from regulated wire cooling sections via coil forming stations to a common transport section, is known. The transfer device consists, among other things, of a coil converter which is arranged rotatably and is equipped with a lifting device, driving device and holding device. The coil converter is arranged in front of a turntable of a transport device; the wire is wound into a bundle on the turntable. With the aid of the holding device of the coil converter, the annular wire bundle is held from the outside and is lifted from the mandrel of the turntable by raising the lifting device of the coil converter. In the uppermost position, the carriage arranged on the coil converter 7 moves back with the lifting device, the coil converter rotates until another transport device and the carriage with the coil of wires located in the holding device moves forward again. By slightly lowering the lifting device and opening the holding device, the wire bundle is transferred to a further transport device which is arranged in the peripheral area of the rotatable coil converter. The trolley then moves back again, the lifting device lowers and the coil transfer device rotates back into the original pick-up position. The structural arrangement of the lifting device and holding device on the coil converter causes considerable static moments, so that the stability of the coil converter is unsatisfactory.

From DE-A-20 15 046 a fine steel bundle discharge device is known, which is characterized in that a rotatable and liftable and lowerable collar discharge device with extendable centrally between different work stations Forks is arranged. The reel pot, coil cooling devices and receiving stations of transport chains are arranged in a circle around this coil discharge device. With the help of the horizontally extendable forks, the wire bundles are no longer pushed, but conveyed. Depending on the distance of the peripheral devices around the central collar discharge device, the forks supporting the wire collar must be extended very far horizontally, which leads to a considerable moment load on the load-bearing elements of the collar discharge device.

The object of the present invention is to avoid the disadvantages of the prior art described at the outset and to provide a discharge and transfer device of the generic type, with which the rolled material rings wound in a reel are discharged from the reel without damage and transferred to a subsequent transport device without damage and with the shortest cycle times due to the optimal allocation of reels and subsequent transport equipment (s). The device of the type defined at the outset should also be able to take over a buffer function in the event of system faults in the rolling mill.

This object is achieved in the generic discharge and transfer device with the characterizing measures of claim 1. Further embodiments of the device are the subject of dependent claims 2 to 6.

According to claim 1, the discharge and transfer device is determined in that the carrier pallet is connected to a vertically arranged lifting cylinder which is arranged on a movable or displaceable frame, the traveling frame or the sliding frame being connected to a horizontal bogie and that the lifting cylinder in the center of gravity of which is connected to a carriage, the upper and lower rollers of which are forcibly guided by rails, the rails being arranged in a housing connected to the horizontal bogie and the carriage being movable by a displacement device, preferably by a piston-cylinder unit, which is supported on the housing. As a result, a wound ring is discharged from a reel for the purpose of transferring it to a downstream transport device without damage since the rings are not repeated have to be picked up and put down and there is no pushing off of coiled rings from a stationary intermediate plate. The coiled rings are transported from the center of the reel without jolts and bumps to the belt position, which prevents the ring from falling over due to transport impacts. Furthermore, one of the transport devices can be used for independent buffering or cooling of hot rolled material rings. The compact design offers increased accessibility for maintenance and reduces the interlocking conditions of the devices. Fewer seams with transport devices in operation also mean higher operational safety. The compact design also means that the foundation design is considerably simpler than that of comparable designs, which is cheaper to manufacture.

In a further embodiment of the invention it is provided that a ball slewing ring is arranged between the horizontal bogie and a machine base connected to the foundation. In this way, i.a. an optimal allocation of reels and subsequent transport device (s) and the superimposition of motion sequences are achieved, so that time-saving ring transport takes place and short cycle times are thereby made possible.

The foundation design of the device advantageously allows that - according to a further embodiment of the invention - its supply with electrical energy and hydraulic pressure medium can take place by means of a rotary distributor known per se, which is arranged in the center of the axis of rotation of the horizontal bogie.

A significant weight saving compared to the comparative versions of the prior art is advantageous thereby achieved that the lifting piston of the lifting cylinder is surrounded by a cylindrical guide sleeve connected to the carriage, which is surrounded by a lifting tube which coaxially slides on the guide sleeve and which is connected to the lifting piston. This results in a stable, lightweight construction in which simple sheets can be used. The high stability of the lightweight construction achieved advantageously allows the carrying pallet to be connected to the upper end face of the lifting tube, which in turn may have extendable supporting arms for the coiled rolled rings.

According to a further embodiment of the invention, the stroke of the carrying pallet or the stroke of the lifting cylinder suitably corresponds at least to the height difference between the discharge position of the rolled material rings from the respective reel and the transfer position to the transport device (s).

Figur 1

eine Draufsicht auf die Austrage- und Übergabevorrichtung mit peripherisch angeordneten Haspeln und einer Transporteinrichtung,

Figur 2

eine Seitenansicht der Austrage- und Übergabevorrichtung nach Fig. 1 mit verschiedenen Austrage- und Übergabepositionen zwischen Haspel und Transporteinrichtung.

The invention is explained in more detail with reference to schematic drawings for an embodiment. Show it:

Figure 1

a plan view of the discharge and transfer device with peripherally arranged reels and a transport device,

Figure 2

a side view of the discharge and transfer device according to FIG. 1 with different discharge and transfer positions between the reel and the transport device.

Fig. 1 shows the plan view of the discharge and transfer device 1, arranged between two rotary basket reels 2, 3 and a transport device 4, which is designed as a conveyor belt. The two rotary basket reels and the conveyor belt are located in the peripheral region 5 of the swiveling movement of the device 1. The swiveling movement of the device 1 can be described in the main coordinates 6, 7. In the case of the rotating reels 2, 3, only the rolled-in material entries 8, 9 are shown, and the liftable plate 10, 11 with longitudinal grooves 12, 13 embedded in the plate bottom. The direction of rotation of the respective reel is indicated by the arrow 14. The rolling stock ring 15 wound in a rotary reel lies on the lifting plate 10, 11.

The rolling stock ring 15 is picked up and discharged in the region of the center of the reel 2, 3 and the rolling stock ring is transferred to the center of the conveyor belt 4 by lifting and lowering the support arms 16 of the device 1 and by pivoting the device 1 in the direction of the arrows 17, 18, the movements of lifting / swiveling and lowering / swiveling overlapping to shorten the time for a transport cycle. To carry out these movements, the discharge and transfer device 1 is particularly designed, as can be seen in FIG. 2.

FIG. 2 shows the rotary basket reel 2 with the rolled material ring 15 lifted out of the reel and located on the lifting plate, the support arms 16 of the device 1 being inserted into the longitudinal grooves 12 of the lifting plate and thus being in the receiving position 21 for the rolled material ring. Fig. 2 also shows the conveyor belt 4, namely a conveyor chain and the transfer position 23 for the rolling stock ring on the conveyor belt. The support arms 16, of which the rolling stock ring 15 is received, are located in the transfer position 23 in the longitudinal openings between the transport chains below their upper edge. Between the discharge position 22 for the rolling stock ring - this is the position in which the support arms 16 of the device 1 are raised from the longitudinal grooves 12 of the lifting plate 10 of the reel over the upper edge of the lifting plate - and the transfer position 23, a height difference must be bridged, which is at least corresponds to the stroke 24 of the device 1. Rotary basket reel 2 and conveyor belt 4 are supported on foundation construction 19, 20.

The discharge and transfer device contains a carousel-like pivotable and liftable and horizontally movable carrying pallet 25 to which the carrying arms 16 are attached. The support arms 16 can optionally be designed to be extendable. The carrying pallet 25 is connected to the upper end face 26 of a lifting tube 27. The lifting tube 27 slides coaxially on a cylindrical guide sleeve 28 which is connected to the upper edge of a trolley 29. A lifting cylinder 30 is also arranged in the carriage 29, the lifting piston 31 of which is connected to the lifting tube 27 and thus to the carrying pallet 25. By introducing a hydraulic pressure medium into the lifting cylinder 30, the lifting piston and thus the carrying pallet can be raised and lowered. The carriage 29 is arranged in a housing 32 and has upper and lower rollers 33, which are positively guided in rails 34, for which purpose the upper and lower rails can each be bent in a U-shape. For reasons of balance, the lifting cylinder with its lifting tube is arranged approximately in the center of gravity of the trolley. The carriage 29 is moved horizontally in the housing 32 by a displacement device 35, which is preferably designed as a piston-cylinder unit and which is supported on the housing 32. The housing 32 with carriage 29 is connected to a horizontal bogie 36. A ball slewing ring 39 is arranged between the horizontal bogie and a machine base 38 connected to the foundation 37. The Horizontal bogie 36 can be connected to a drive unit 40, optionally provided with a gear, which is preferably arranged on the machine base 38 and whose drive pinion 41 engages in an annular toothed ring 42 of the bogie 36. The discharge and transfer device 1 is supplied with electrical energy, for example for the drive unit 40, and with hydraulic pressure medium, for example for the lifting cylinder 30, by means of a rotary distributor which is known per se and is therefore not shown in detail, which is located in the center of the axis of rotation 43 of the horizontal Bogie 36 is arranged. In the discharge and transfer device 1, two driving positions 44, 45 of the trolley 29 are shown in the device housing 32. Driving position 44 indicates the waiting position "center of lifting tube" in front of reel 2. Driving position 45 indicates the waiting position "center lifting tube" in front of the conveyor belt 4.

According to FIGS. 1 and 2, the carriage 29 is moved from its waiting position 44 in front of the reel 2 by the displacement device 35 in the direction of reel 2, as a result of which the support arms 16 pass under the rolling stock ring 15 on the lifting plate 10 of the reel. By actuating the lifting cylinder 30, the lifting tube 27 and thus the supporting pallet 25 with the supporting arms 16 are raised so far that the latter are above the upper edge of the lifting plate 10. Then the horizontal bogie 36, on which the device 1 rests, is pivoted by the drive unit 40 in the main coordinate system 6, 7 in the direction of the arrow 17 to the conveyor belt 4. The carriage 29 is thus in the driving position 46 (Fig. 2). By actuating the lifting cylinder 30, the lifting tube, the supporting pallet connected to it and its supporting arms 16 are lowered into the waiting position 45. The carriage 4 is then moved into the transfer position 23. If the rolling stock ring 15 is set down on the conveyor belt 4, the support arms are lowered slightly further by means of the lifting cylinder, so that the rolling stock ring rests freely on the conveyor belt and can be transported further. All other positions in the main coordinate system 6, 7 are approached in the same or similar manner as previously described movement sequences, according to which the carrying pallet for the rolled rolled material rings can be pivoted carousel-like, lifted and moved horizontally as a result of the design of the discharge and transfer device according to the invention, the individual movements being able to take place separately or in a superimposed manner. The task set out at the outset, in particular the damage-free transport of the wound rolled material rings, is therefore ideally achieved with the discharge and transfer device designed according to the invention.

Reference symbol overview

1

Discharge and transfer device

2, 3

Rotary basket reel

4th

Transport device, conveyor belt

5

Peripheral area

6, 7

Main coordinates

8, 9

Rolling stock entry

10, 11

Lifting plate

12, 13

Longitudinal groove

14

Arrow

15

Rolling ring

16

Beam

17, 18

Swivel direction

19, 20

Foundation construction

21

Pick-up position for rolling stock ring

22

Discharge position for rolling stock ring

23

Transfer position for rolling stock ring

24th

Device stroke 1

25th

Pallet

26

Face of the lifting tube

27

Lift tube

28

Guide sleeve

29

Trolley

30th

Lifting cylinder

31

Reciprocating piston

32

Frame / housing

33

Castor

34

Track

35

Displacement device

36

Horizontal bogie

37

foundation

38

Machine base

39

Ball slewing ring

40

Drive unit

41

pinion

42

Sprocket

43

Axis of rotation

44

Waiting position in front of reel

45

Waiting position in front of conveyor belt

46

Driving position

Claims (6)

1. Device for the discharge of roll stock wound into rings, especially of wire from a coiling device and for the transfer of the rolled stock rings to downstream transport devices, wherein coiling device and transport devices are installation components of a single-line or multi-line rolling train for wire, high grade steel or intermediate steel, substantially consisting of a furnace for the roll material used as well as a preliminary rolling train, intermediate rolling train and optionally also finishing rolling train for the roll stock and wherein the discharge and transfer device (1) is provided with a pivotable, raisable and horizontally movable carousel-like support palette (25) for the wound roll stock rings (15) and wherein one or more coiling devices (2, 3) and one or more transport device(s) (4) are arranged in the peripheral region (5) of the pivotation of the support palette (25), characterised thereby that the support palette (25) is connected with a vertically arranged stroke cylinder (30) which is arranged on a displaceable or slidable frame, wherein the drive frame (32) or the slide frame is connected with a horizontal turntable (36), and that the lifting cylinder (30) is connected at its centre of gravity with a drive carriage (29), the upper and lower travel rollers (33) of which are constrainedly track-bound, wherein the travel rails (34) are arranged in a housing (32) connected with the horizontal turntable (36) and the drive carriage (29) is movable by a displacing device (35), preferably by a piston-cylinder unit, which is supported at the housing (32).
2. Discharge and transfer device according to claim 1, characterised thereby that a ball-mounted revolving ring (39) is arranged between the horizontal turntable (36) and a machine substructure (38) connected with the foundation.
3. Discharge and transfer device according to claim 1 or 2, characterised thereby that the lifting piston (31) of the lifting cylinder (30) is surrounded by a cylindrical guide sleeve (28), which is connected with the drive carriage (29) and which is surrounded by a lifting tube (27), which is slidably guided coaxially at the guide sleeve (28) and which is connected with the lifting piston (31).
4. Discharge and transfer device according to claim 1, 2 or 3, characterised thereby that the support palette (25) is connected with the upper end face (26) of the lifting tube (27) and in turn has optionally withdrawable support arms (16) for the wound roll stock rings (15).
5. Discharge and transfer device according to at least one of claims 1 to 4, characterised thereby that the stroke (24) of the support palette (25) or the stroke of the lifting cylinder (37) is settable at least in accordance with the difference in height between the discharge position (22) of the roll stock rings from the respective ceiling device and the transfer position (23) at the transport device(s) (4).
6. Discharge and transfer device according to at least one of the preceding claims, characterised thereby that the supply thereof with electrical energy and hydraulic pressure medium is effected by means of a per se known rotary distributor, which is arranged in the middle of the axis (43) of rotation of the horizontal turntable (36).

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