DE2906126C2 - Cooling bed for transverse conveying of rollable rolling stock - Google Patents

Description

The invention relates to a cooling bed for the transverse conveying of rollable rolling stock (pipes or round bars), consisting of two groups of vertically movable, dependent on and opposite to each other, toothed rake, each driven by a lifting drive with drive elements offset from one another by 180 ° are driven and from fixed rake, wherein the transversely conveyed rolling a longitudinal rolling movement the fixed rake carries out.

Such a cooling bed is known from DE-PS 6 10 544. This cooling bed has the disadvantage that the rollable Rolled material is conveyed crosswise in an uncontrolled manner and during the partial cross-conveyor movement inclined movable rake flanks. Because of this contact between the calculation edge and Surface of the rollable rolling stock occurs during the upward movement of the movable rake and simultaneous transverse conveying on the circumference of the rolling stock to form scoring and sliding marks. In which The movement system of the movable rake and the arched design of the rake flanks results for all diameters a rolling time including glass content of approx. 30% and a rest time of approx. 70% of the Rolling stock cycle sequence.

Due to the uncontrolled transverse conveying of rolled material that can be rolled, the unwinding with sliding component, the indefinite positioning and the long rest time of the rolled material on the conveyor track, this cooling system is unsuitable due to the high demands placed on the cooled rolled material in terms of surface properties, directional effect and degree of roughness.
Therefore, the invention is based on the object of a generic cooling bed to achieve an uninterrupted rolling of the rolling stock over the entire transverse conveying path along the cooling bed without sliding movement relative to the movable and fixed rakes and, in addition, a considerable lengthening of the rolling path, with the same length for all rolling stock diameters Rolling sections are created and the moving rake does not have to be converted to other rolling stock dimensions, and at the same time the construction of the cooling bed is simplified.

This object is achieved according to the invention by the measures specified in the characterizing part of claim 1 solved

The advantage of such a structural design of the cooling bed is that the rolling path and thus the cooling path of the rolling stock is increased by up to 40%. Here, the rolling movement of the rolling stock takes place over the entire length of the cooling bed, from pick-up to delivery. As a result of the longer and continuous rolling path, the directivity on the rolling stock is significantly increased and thus optimal cooling conditions are created so that the cooling bed can be kept shorter. The runway of the various profile dimensions in always the same size, so that when you modify the stroke movement of the movable rake eliminated. A simple control is thereby achieved and no adjustment devices are required. The cooling bed can be operated in both cross conveying directions.
In a further embodiment of the invention, the rake teeth of the two groups of movable rakes are designed opposite one another in a sawtooth shape, the tooth flanks causing the rolling movement of the rolling stock extending over the length of the tooth pitch. The tooth tips of the two groups of movable rakes are laterally offset to the tooth base of the fixed rake in accordance with the contact surface of the rolling stock with the largest diameter in their initial position, approximately congruent with the conveying plane of the fixed rake. The tooth flanks of the teeth of the fixed rake form an angle of at least 90 ° with one another in the tooth tip.

The mirror-image sawtooth-shaped design of the movable rake results in production the rake manufacturing advantages as well as a material saving. Overall is seen a with this rake cooling bed an optimal cooling and cooling effect and a desired surface-friendly transport of the rolling stock is achieved.

In a cooling bed known from DE-AS 21 05 631 with fixed and movable rakes, where the center line of the teeth of the fixed rake is vertical and the fixed and movable rakes have the same tooth pitch, the lifting movement takes place after

a rectangular locus.

The vertical lifting movements cause the non-slip rolling and transverse conveying of the rollable rolling stock. The horizontal lifting movements serve to take over and transfer the rolling stock to the subsequent one Separation of rakes with teeth. During this takeover and handover time, the rollable rolling stock rests in the Zackengrund Her fixed or movable rake. The idle times are depending on the diameter of the rolling stock 30-70% of the rolling stock follow-up time This leads to uneven cooling on the rolling stock circumference.

An embodiment of the invention is shown in the drawing. It shows

F i g. 1 the cooling bed in side view,

F i g. 2 the cooling bed in the front view,

3 shows the sequence of the rolling movement of different Profile cross-sections during the transverse conveying movement of the groups of movable rakes over the rising and falling flanks of a tooth of the fixed rake, with the groups of movable ones Rakes in their lower starting position '; τι principle and

F i g. 4 to 9 show the course of the rolling movement via a tooth division of the fixed rake in individual phases and the corresponding position of the groups of movable rakes to the fixed rakes in principle.

In Figs. 1, 2 and 3 are with 1 fixed, toothed racks, and with 2 and 3 are groups of movable toothed racks referred The teeth la of the solid rake 1 face the both side edges toward symmetrical tooth tips on the angle of "at least 90 °.

The tooth pitch of the teeth 2a or 3a of the groups of movable rakes 2 or 3 corresponds to the tooth pitch of the fixed rake 1, but the rake teeth 2a and 3a are designed opposite one another in a sawtooth shape. In addition, the tooth tips of the teeth 2a and 3a of the groups of movable rakes 2 and 3 are offset from the tooth base of the teeth Xa of the fixed rake 1 on both sides in such a way that they safely engage below the bearing surface of the cross-fed rolling stock profile W with the largest diameter. The inclination of the effective tooth flanks of the rake teeth 2a and 3a is designed in such a way that in their initial position they are aligned with the corresponding rising or falling tooth flanks of the fixed rake 1 or are parallel to these slightly offset below the tooth base of the fixed rake 1 (cf. Fig. 3).

The fixed rake 1 are fixedly mounted on a frame structure 4, 5 and 6, which are opposite the Foundation support.

The movable rakes 2 and 3 are mounted in groups on supports 7 and 8, respectively, which run transversely to the conveying direction R and are offset in height. The supports 7 are connected to lifting bars 9 and the supports 8 are connected to lifting bars 10, which are arranged below the conveying level in the conveying direction R and form the group of movable rakes 2 and the group of movable rakes 3. The lifting bars 9 and 10 are accommodated by lifting beams 11, 12 and the support bearings 13 and 13a with rollers 14 and 14a rotatably mounted therein, the rollers 14 and 14a being supported on pairs of cams 15, 15a and 16, 16a. The pairs of cams 15, 15a and 16, 16a sit non-rotatably on shafts 17, 18 running transversely to the conveying direction, but the pairs of cams 15, 15i are offset by 180 ° to the pairs of cams 16, 16a on the shafts 17, i8. The shafts 17, 18 are driven by a motor 19 via gears 20, 21 in synchronism via shafts 22.

Underneath the walking beams 11, 12, straight guides 23 extending towards the center line of the fixed rake teeth la are arranged to accommodate guide rollers 24. The guide rollers 24 are rotatably mounted in a support bearing 25 fixedly connected to the foundation F.

In the F i g. 3 to 9 show the rolling movement of the rolling stock W of two round profiles with different cross-sections during the rolling over a rake tooth la of the fixed rake 1 by means of the two groups of movable rakes 2 and 3 in the conveying direction R. H with the stroke of the groups of movable rakes 2 or 3 is designated for the lifting and lowering movement. As can be seen from the figures, the rolling movement of the rolling stock W takes place on the rising tooth flank of the rake teeth la of the fixed rake 1 by means of the grapple of movable rake 2, while the group of movable rakes 3 the rolling movement of the rolling stock W on the falling tooth flank of the Rake teeth la the fixed rake 1 takes over. As a result of the same size, but the inclination of the fixed rake 1 in the opposite direction, the inclination of the tooth flanks of the movable rake 2 and 3 in their effective cross conveyor sections during the lifting and lowering movement along the tooth flanks of the fixed rake 1 occurs during the rolling movement of the rolling stock profiles W during cross conveying V no sliding movement adversely affecting the circumferential surfaces of the rolling stock W.

In the F ί g. 4, the Wnizgut is conveyed transversely by lifting the group of raisable and lowerable rakes 2 in the direction of the tooth tip of the teeth la of the fixed rake 1 during the lifting movement H along the rising flank while rolling.

In FIG. 5, the movable rakes 2 are just before their upper end point of the lifting movement H, wahrer.H the movable rakes 3 have already reached their upper end point of the lifting movement H , the rising tooth flank of the fixed rake 1 with the tooth flank of the movable one that then takes over the rolling stock ^ Rake 3 is aligned.

In Fig. 6, the rolling stock W lies directly above the tooth tip of the fixed rake 1, embedded between the movable rakes 2 and 3, whose effective tooth flanks in the upper end position of the lifting movement // are aligned with the falling or rising tooth flanks of the fixed rake 1.

In Fig. 7 begins the rolling movement of the rolling stock W along the falling tooth flanks of the fixed rake 1, in that the lowering movement of the movable rake 3 has started. To fix the position of the rolling stock W , the movable rakes 2 still remain in their upper stroke position in order to prevent the rolling stock W from rolling back with certainty.

In FIG. 8 the rolling movement of the rolling stock W continues along the falling tooth flanks of the fixed rake 1, in that the movable rake 3 is lowered further. The movable R '. .-hen 2 have already reached the lower position of the lifting movement H and are ready with their effective tooth flank in alignment with the falling tooth flank of the fixed rake 1 for the takeover of rolling stock W.

In FIG. 9, the movable rakes 3 reached their lower stroke position and are in their starting position for the next cross conveyor cycle. The rolling

good W is a tooth pitch of the fixed rake 1 while covering the rolling path V in the cross conveying direction R due to the alternating lifting and seric movement of the groups of movable rakes 2 and 3 without relative movement between the rolling stock W and the tooth flanks of the rakes 1, 2 and 3 has been moved on.

In addition 9 sheets of drawings

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Claims (4)

Patent claims: 1. Cooling bed for the transverse conveying of rollable rolling stock (pipes or round bars), consisting of two groups of toothed rakes, which are vertically movable in relation to one another and in opposite directions, and which are each driven by a lifting drive with drive elements offset by 180 ° to one another and of fixed rakes, the rolling stock to be transversely conveyed executes a rolling movement along the fixed rakes, characterized in that the fixed rakes (1) are toothed in such a way that the center line of the teeth runs vertically that the tooth pitch of the fixed rakes (1) is equal to that of the movable rakes (2 or 3), one group of movable rakes (2) the rolling stock (W) along the rising tooth flanks of the fixed rake (1) beyond their tooth tips and the other group of movable rakes (3) the rolling stock (W ) moves along the falling tooth flanks of the fixed rake (1), and that the rolling stock (W) conveying tooth flanks of the movable rake n (2 or 3) have the same but opposite inclination as the tooth flanks of the fixed rake (1). 2. Cooling bed according to claim 1, characterized in that the rake teeth (2a; 3a) of the two groups of movable rake (2 or 3) are oppositely formed in a sawtooth shape, the rolling movement of the rolling stock (W) causing tooth flanks over the Extend the length of the tooth pitch. 3. Cooling bed according to claim 1 or 2, characterized in that that the tooth tips of the two groups of movable rakes (2 and 3) to the tooth base the fixed rake (1) laterally offset according to the support surface of the rolling stock with the largest diameter in its initial position roughly congruent with the conveying level of the fixed rake (1) are arranged. 4. cooling bed according to one of claims 1 to 3, characterized in that the tooth flanks of the Teeth (ladder fixed rake (1) form an angle of at least 90 ° with each other in the tooth tip.