EP1683588A1 - Device for transporting coils of metal strip on pallets - Google Patents

Abstract

A pallet (4) has a support saddle (13) formed by two longitudinally spaced U-shaped transverse blocks (14) connecting the longitudinal rails (11) to receive a coil of metal strip. The pallet has two radiant heat shield plates (26,27) fixed between the strips and rails, longitudinally flanking the supports.

Description

The invention relates to a device for transporting after a rolling process by winding a rolled metal strip produced, very heavy metal bands, comprising in a circulation system used pallets and these further promotional roller tables, a range of spaced-apart side members and a bridging this collar support saddle consists, the opposite, having a support bracket enclosing bearing.

Such pallet circulation systems find for cold coils, i. for cold-rolled metallic strips wound into coils on reels following a rolling line, e.g. in the aluminum industry, for a long time application. They are characterized by a high transport performance with bundle weights of up to 45 tons and short cycle times. In comparison to other transport systems, however, only relatively small masses are moved, which results in reduced drive power and good positioning capability. There are at the same time advantages in maintenance, availability, spare parts, easy insertion and removal of coils (Coils) as well as an increase in transport services simply by additionally usable pallets. In addition, there is a high flexibility and a decoupling of loading and unloading.

Such a circulation system with the use of pallets for the transport of heavy, for example 30 to 45 to weighing coils or coils for hot coils, ie with a jacket temperature of the wound coils of about 500 ° C to 800 ° C, is so far because of the high temperatures despite the big advantages but not considered been drawn. Because in addition to the high weights come the inevitable structural deformations causing large thermal loads. These lead to displacements, which may amount to a few millimeters, of the pallet. The temperature distribution in the pallet is also different and in the area of the supports of the support saddle with greater impact than in the radiation shadow of the applied warm collar and the perpendicular to the radiant surface areas.

The invention is therefore an object of the invention to provide a generic device that allows a reliable transport system despite the cumulative effects of load and heat.

This object is achieved in that the pallet is designed to transport a hot collar with a precalculated under load and heat influence vertical and horizontal deformation compensating contouring at least their side members. The invention is based on the knowledge, based on finite element calculations, that the pallets with their longitudinal members remain on their track predetermined by the wheel flange of the roller tables and their running ability can be maintained undisturbed, if at least the longitudinal members are present on the basis of occurring Preformed deformations and the vertical and horizontal deformations are formed compensating. A curvature of their treads and lateral bulges to the outside or any other delay remain without adverse effect on the running behavior of the range, so that the use of pallets for the transport of hot coils without interference is possible.

These contouring can be lathing or recesses in the region of the flange, perforations in other components of the pallet, gradations or the like, ie. Such measures may be under the thermal and mechanical Loading the longitudinal beams and thus the pallet unchanged give at least approximately ideal running behavior. A collapse of the hot coils caused by changes in the transport speed and bumps is prevented, even if the hot coils with their lateral surface will be transported lying on. It is therefore no transport with on the faces (record side) resting hot coils required.

A preferred embodiment of the invention provides that the pallet is formed with the radiation and heat conduction of an inserted into the support saddle warm collar to the longitudinal beams towards reducing heat protection center. This heat protection means, according to embodiments of the invention advantageously arranged between the supports in the foot of the collar support saddle above the longitudinal beam, extending over the width of the pallet heat shield and additionally or alternatively employees from the front ends of the pallet against the supports of the collar support saddle, Heat shields also extending across the width of the pallet prevent the radiant heat from penetrating excessively, thereby significantly reducing the deforming influence on the pallet and its side members.

A particular, shaping measure is that the running surfaces of the longitudinal beams are designed according to the invention runner-like and have front end side relative to the transport line of the roller table at an angle upwardly sloping inclined surfaces. In this way can be achieved, although the side members experience a deflection upward after a surprising finding, caused by a horizontal load component of resting on the supports of the support saddle warmth that below the inclined surfaces always leaves a free space, the undisturbed tarnishing and further transporting the range allowed the roller tables.

In a preferred embodiment of the invention, two movable single skids form a longitudinal beam. The pallet thus runs on four individual skids, each of which is movably mounted, which, independently of each other but in addition, can react to the influence of heat and large bundle weights and, in interaction with the contouring, lead to an idealized running surface.

A preferred embodiment of the invention provides that between the inclined surfaces and a central, flat portion which has a length corresponding at least to the pitch of the rollers of the roller table, the longitudinal beam is formed a sloping portion with a smaller angle to the transport line. Due to the thus uneven angles, which are also dependent on the roller spacing or division of the rollers of the roller coasters as the central planar portion of the side members, it is supported that the side members do not bulge out to the roller table, but the inclined sections rather in a slight concave Go arc, with the angle changed to zero. In conjunction with the central section for the longitudinal members, this results in a generally longer, possibly even multiple roles overlapping, idealized level running area. The bevel angle, on the other hand, remains virtually unchanged, thus ensuring smooth start-up capability.

According to a further embodiment of the invention, the longitudinal members have a constricted, elastic deformation region in a middle section between the supports of the collar support saddle. A contouring of the side members balancing contouring is here at the scene of the action with the greatest heat, namely under the collar above the web or cover plate of the pallet between the supports. The two-sided, next to the constriction remaining, up to the front end-side inclined surfaces even, a plurality of roller table rollers bridging tread portions of the side members are thus relieved of the radiant heat, including in turn contributes to the horizontally arranged heat shield in the foot of the support saddle.

It is proposed according to the invention that the longitudinal members are arranged on outwardly projecting support bolts of a collar carrying saddle having pallet frame with a resilient mounting. This movable storage, e.g. Cuffs made of rubber, plastic or the like, allows a limited range of motion and thus avoiding the side members when caused by the influence of heat lateral curvature or bulging of the pallet.

Another solution to compensate for the lateral curvature or bulge of the range provides according to the invention that the longitudinal members are arranged on the one hand on outwardly projecting support bolts of the collar support saddle having pallet frame with a hinge bearing and on the other hand rest freely movable on a ball bearing of the pallet frame. The joint support of the here held by a spacer or the like at a distance to the pallet frame longitudinal beams can be performed, for example in the manner of a gimbal with successive sliding half-shell-like joints pieces. The other end of the range upstream floating bearing allows a free adjustability. Abhubsicherungen a dropping down of the bearing seats is prevented.

Fig. 1

in einer Längsansicht ein Palettenumlaufsystem zum Transport von Metallbunden mit in verschiedenen Höhenebenen vorgesehenen Rollgängen;

Fig. 2

als Einzelheit des Fördersystems nach Fig. 2 in einer perspektivischen Ansicht ein in den Förderstrecken integriertes Hubgerüst;

Fig. 3

als Einzelheit der Förderstrecken des Palettenumlaufsystems einen Rollgangsabschnitt in einer perspektivischen Draufsicht;

Fig. 4

als Einzelheit in einer Seitenansicht eine Palette, dieser im Abstand darunter zugeordnetem, schematisch gezeigtem Rollgang und dazwischen dargestellten Verformungsverläufen der Längsträger der Palette, zur Verdeutlichung sehr stark überzeichnet;

Fig. 5

die Palette nach Fig. 4 in der Draufsicht;

Fig. 6

eine Seitenansicht der Palette nach Fig. 4;

Fig. 7

in einer Seitenansicht eine andere Ausführung einer Palette;

Fig. 8

in einer Seitenansicht eine weitere Ausführung einer Palette;

Fig. 9

als Einzelheit der Palette nach Fig. 8 ein Schnitt entlang der Linie IX-IX;

Fig. 10

in einer Seitenansicht eine andere Variante einer Palette;

Fig. 11

die Palette nach Fig. 10 in der Draufsicht;

Fig. 12

als Einzelheit die Palette nach Fig. 10 einen Schnitt entlang der Linie XII-XII;

Fig. 13

als Einzelheit der Palette nach Fig. 10 einen Schnitt entlang der Linie XIII-XIII;

Fig. 14

in einer Seitenansicht eine Ausführung einer mit zwei beweglichen Einzelkufen ausgebildeten Palette; und

Fig. 15

die Palette der Fig. 14 in einer teilgeschnittenen Vorderansicht.

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

Fig. 1

in a longitudinal view of a pallet circulation system for the transport of metal coils with provided in different height levels roller tables;

Fig. 2

as a detail of the conveyor system of Figure 2 in a perspective view of a mast integrated in the conveyor sections.

Fig. 3

as a detail of the conveyor lines of the pallet circulation system a roller table section in a perspective plan view;

Fig. 4

as a detail in a side view of a pallet, this at a distance below associated, schematically shown roller table and shown in between deformation profiles of the side members of the pallet, very heavily oversubscribed for clarity;

Fig. 5

the pallet of Figure 4 in plan view.

Fig. 6

a side view of the pallet of Fig. 4;

Fig. 7

in a side view, another embodiment of a pallet;

Fig. 8

in a side view, another embodiment of a pallet;

Fig. 9

as a detail of the pallet of Figure 8 is a section along the line IX-IX.

Fig. 10

in a side view, another variant of a pallet;

Fig. 11

the pallet of Figure 10 in plan view.

Fig. 12

as a detail, the range of Figure 10 is a section along the line XII-XII.

Fig. 13

as a detail of the pallet of Figure 10 is a section along the line XIII-XIII.

Fig. 14

in a side view, an embodiment of a trained with two moving skids palette; and

Fig. 15

the pallet of Fig. 14 in a partially sectioned front view.

A pallet circulating system 1 shown in excerpts in FIG. 1, used in a rolling mill operation for the production of metallic strips, contains conveying sections 2, which are arranged in different levels in the foundation 3. On the conveyor lines 2, the wound after rolling to coils or metal coils wound coils 5 are transported by pallets 4 and distributed, in particular forwarded downstream treatment stations. There are several workstations for the pallets 4 to be accepted hot coils 5 shown. An integrated into the conveyor section 2 mast 6 ensures distribution to the different height levels.

The mast 6 can be seen closer to the Fig. 2, therefore, a plurality of pallets 4 are provided on the lower and upper roller table sections 7, of which one is occupied with a warm collar 5 in the embodiment. The roller table sections 7 have a larger number of rollers 8 which are driven by a central drive motor 9 and individual chains 10 coupled in series (compare FIG. 3).

As is apparent from FIGS. 5 and 6, for example, the pallets 4 consist of two longitudinally spaced-apart longitudinal members 11 with a web plate 12 arranged therebetween and a support saddle 13 into which the hot-rolled collar 5 is placed (see FIG. 2). , The support saddle 13 is composed of two opposite each other at a distance, the longitudinal beams 11 bridging, in cross-section substantially U-shaped structures 14 together, at their upper, one to be inserted Warmbund facing ends are provided with inwardly inclined supports 15. The hot-rolled collar 5 is thus supported by four supports 15 (see Fig. 5). The opposing supports 15 include a support angle γ, which is optimized depending on the diameter ranges of the hot coils to be inserted and ensures a largely equal distribution of the horizontal and vertical load components.

Under the load of the hot collar and in particular the effects (radiation and heat conduction) of the high temperatures of the hot collar 5, the pallet 4 deforms; the stress distributions lead to displacements, wherein the longitudinal members 11 bend upwards and bulge laterally, the latter by the exaggerated in Figs. 5 and 11 drawn lateral curvature curves 16 illustrates.

In order nevertheless to ensure the running behavior of the pallet 4 on the rollers 8 of the roller tables 7 of the conveyor lines 2, the side members 11 are formed with these influences compensating, runner-like running surfaces, the end face side relative to the transport line 17 (see FIG .. 4, bottom and FIG 10) of the rollers 8 of the roller table 7 at an angle α upwardly sloping surfaces 18 have.

In the pallet 4 according to FIGS. 4 to 6 are between the inclined surfaces 18 and a central, planar portion 19 of the side members 11 also oblique sections 20 (β-line) with a smaller angle β to the transport line 17 than the angle α of the inclined surfaces 18th (α-line) provided. The length of the flat, central portion 19 of the side members 11 is greater than the distance or the pitch T of the rollers 8. Without such a design of the side members 11, these would exaggerated in Fig. 4 directly below the pallet exaggerated under load and heat influence, with reference to the dot-dashed zero line 38 of the straight line Transport line 17 shown by solid curve 21 occupy and thus arc-shaped upward bend, the front and rear end portions of the running surfaces of the side members 11 would get below the zero line 38 and transport line 17. On the other hand, however, the curve curve 22, which in turn is markedly oversubscribed, appears in dashed line, according to which the β angle of the oblique sections 20 (compare β line) changes to zero, resulting in interaction with the deformation of the central plane Section 19 a total of very long, a true-to-detail transport enabling, largely flat tread results that can deform under any circumstances under the transport line 17 and zero line 38. The angle α of the inclined surfaces 18 (see the α-line) remains virtually unchanged. To compensate for the laterally bulging curve 16, the longitudinal members 11 are provided with the wheel flange of the roller table rollers 8 associated recesses 23 (see Fig .. 6).

For all pallet designs, contouring in the form of transverse and longitudinal bores 24, 25 are also formed in the structures 14 of the support saddles 13 for deformation compensation. To limit the effects of heat also heat shields 26 and 27 are provided, on the one hand arranged between the supports 15 in the foot of the support saddle 13 above the side members 11 and on the other hand from the front ends of the pallet 4 forth against the supports 15 and their structures 14 employed ( Heat shields 27).

In the pallet 104 shown in FIG. 7, the side members 111 have a constricted, elastic deformation region 28 in addition to the oblique surfaces 18 running out at the angle .alpha. In their middle section between the supports 15 or assemblies 14. The present on both sides between the inclined surfaces 18 and the elastic deformation region 28 treads 29 have a largely flat length which corresponds to a multiple of the pitch T of the rollers 8.

In the pallets 204 according to FIGS 8 and 9 and 304 according to FIGS 10 to 13 are formed with the front end side inclined surfaces 18 longitudinal members 211 and 311 on the outside of a Paletterigrundrahmen 30 (see Fig. 9 and Fig. 11 to 13). In order to compensate for the thermally and mechanically induced displacements, the longitudinal members 211 are mounted on outwardly projecting support bolts 31 with the interposition of a resilient mounting 32 (cf., FIG. 9). A safety distance to the base frame 30 is ensured by a spacer ring 33.

The pallet 304 of FIGS. 10 to 13 is formed at its end facing the left pallet side in FIGS. 10 and 11 with fixed bearings for the longitudinal members 311. The longitudinal members are arranged there on a ball socket-like joint bearing 34 with a spacer ring 35 to the pallet frame 30 on trunnions 31. At their end facing the right-hand side of the pallet, on the other hand, they are arranged on a floating bearing (see Fig. 13), for which purpose they are saddle-shaped at this end (compare the sectional view in the right-hand half of Fig. 10) and with the interposition of a roller or roller Ball 36 are supported by a frame bracket 37.

In the pallet 404 shown in FIGS. 14 and 15, the two side members 411 each consist of two individual runners 39 a, 39 b. Each individual runner 39 a, 39 b is mounted with individual mobility in the base frame of the pallet 404 via a bearing 40 (see FIG. 15) and has both the front and the rear the oblique surfaces 18 provided with the angle α.

Claims (10)

Device for transporting very heavy metal bands (5) produced by rolling a rolled metal strip following a rolling operation, comprising pallets (4) inserted in a circulating system and further conveying roller conveyors (8), one pallet (4) being spaced from each other Longitudinal members (11) and a this bridging collar support saddle (13 =), the opposite, a support bracket (7) enclosing bearing (15),
characterized,
in that the pallet (4, 104, 204, 304) for transporting a hot-rolled collar (5) has at least its longitudinal members (11, 111, 211, 311) with compensating contouring (18, 20, 23) which compensates for vertical and horizontal deformation pre-calculated under load and heat influence ) is trained. Device according to claim 1,
characterized,
that the pallet (4, 104, 204, 304) with the radiation and heat conduction of a in the support saddle (13) inserted warm collar (5) to the longitudinal beams (11, 111, 211, 311) towards reducing heat protection means (26; 27) is formed is. Device according to claim 1,
characterized,
that the running surfaces of the longitudinal members (11, 111, 211, 311) are designed like runners and stimendseitig based on the transport line (17) of the roller table (7) at an angle (α) upwardly sloping inclined surfaces (18). Device according to claim 3,
characterized,
that between the inclined surfaces (18) and a central, planar portion (19) having an at least the pitch (T) of the rollers (8) of the roller table (7) corresponding length, the longitudinal beam (11) has a beveled portion (20) a smaller angle (β) to the transport line (17) is provided. Device according to one of claims 1 to 3,
characterized,
that two movable single skids (39 a, 39 b) form a longitudinal beam (411). Device according to one of claims 1 to 3,
characterized,
in that the longitudinal members (111) have a constricted, elastic deformation region (28) in a middle section between the supports (15) of the support saddle (13). Device according to one of claims 1 to 3,
characterized,
in that the longitudinal members (211) are arranged on outwardly projecting support bolts (31) of a pallet frame (30) having a support saddle (13) with a resilient mounting (32). Device according to one of claims 1 to 3,
characterized,
in that the side members (311) on the one hand on outwardly projecting support pins (31) of the support saddle (13) having pallet frame (30) are arranged with a hinge bearing (34) and on the other hand freely movable on a ball bearing (36) of the pallet frame (30) rest , Device according to one of claims 2 to 8,
marked by
a between the supports (15) in the foot of the support saddle (13) above the longitudinal beams (11, 111, 211, 311) arranged over the width of the pallet (4, 104, 204, 304) extending heat shield (26). Device according to one of claims 2 to 9,
marked by
from the front ends of the pallet (4, 104, 204, 304) ago against the supports (15) of the support saddle (13) employed, extending over the width of the range heat shields (27).

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