EP0077951A2 - Braking groove for rolled bars, especially for round material - Google Patents

Abstract

The slide-free brake trough for rolling rods comprises a stationary channel part 38 for each rolling core, each with two downwardly open chambers 38a, 38b, which are normally closed by the sliding surface 37a of a pendulum body 37, so that the rolling rods are braked. To eject the rods onto the cooling bed, the pendulum body is pivoted clockwise to the right and left until the ejector openings 40 come under a pair of chambers. Kinematic reversal is also conceivable, in which the sliding part 37 is fixed and the channel parts 38 execute an oscillating movement.

Description

The invention relates to a brake trough for rolled bars, in particular round material, which run out of a rolling mill at high speed, consisting of a trough part which forms at least two adjacent troughs for lateral guidance of the rolling stock, and a sliding part which forms sliding surfaces for the rolling stock, whereby the channel part or the sliding part relative to the other, fixed part is adjustable transversely to the rolling stock in such a way that the tread bars located in the troughs are released by the transverse movement alternately to free fall from the troughs.

Such a brake trough has become known from DE-A1-20 08 250, in which the trough part forming the troughs is fixed and the sliding part is designed as a pendulum body which is driven so as to be reversibly pivotable about an upper longitudinal shaft extending in the running direction of the roller bars. Due to the alternating pivoting away of the sliding surfaces of the pendulum body carrying the two rolling rods, the rolling rods are ejected alternately, whereby according to the prior art a gradual braking of the rolling rods is provided in multiple channels. A disadvantage of this construction of a brake trough, however, is that the troughs are open at the top, so that in particular thin round material can easily be made can escape the channels. This affects the functional safety of the brake system.

Closed troughs of a brake trough for rolled bars have become known from DE-A-465 625. The troughs of this brake trough have continuously open longitudinal slots, which can be closed by reversing movements of the troughs either by means of stationary coverings or opened downwards to eject the rolling stock, in that the tubular troughs can be rotatably reversed about their longitudinal axes, in order to steer one trough each open the longitudinal slot from the area of an overlap so that the rolled rod that has come to rest in the trough is ejected by free fall. This known brake channel 'requires a controllable rotary drive for each channel, in contrast to the solution according to DE-A1-20 08 250, in which the sliding part designed as a pendulum body is transversely movable by a single drive.

Starting from the brake trough according to DE-A1-20 08 250, the invention has for its object to brake the rolling stock in closed troughs while maintaining the advantage for the relative movement between the trough part forming the troughs and the sliding part forming the sliding surfaces for ejecting the Rolling bars that have come to rest only require a single drive.

This object is achieved according to the invention in that the troughs of the trough part are formed by two downwardly open chambers which are closed by the sliding surface of the sliding part in the middle position of both parts which are movable relative to one another. If, due to its defined length, the sliding surface in the case of the relative transverse movement between the channel part and the sliding part alternately reaches outside the vertical projection of one of the chambers, the rolling rod located in this chamber can fall downwards, where it is used moderate in a rest of a swing rake cooling bed. It is not possible for the rolling rods to break out during the braking process, since the central positions of the two parts which are movable relative to one another are in the chambers which are closed on all sides.

Since the brake trough according to the invention must have a relatively large length, it expediently consists of a plurality of trough and slide parts, provided with inlet funnels and connected in the manner of wire guide tube elements, with a common drive for one of the parts.

As far as described so far, the invention is independent of whether the channel part forming the channels or troughs is stationary and the slide part is movable transversely, or vice versa. However, the embodiment is preferred in which the channel part forming the channels is stationary and the slide part is movable transversely, the chambers of the channel part being separated from one another by a web which, in the central position of the slide part, closes an ejector opening assigned to both chambers within the slide surface of the slide part, wherein the ejector opening can be controlled alternately under one or the other chamber by the transverse movement of the sliding part. This embodiment is advantageous because the troughs or chambers are always in the line of alignment of the rolling rods entering the brake trough. In the other embodiment, in which the slide part is stationary and the channel part forming the channel parts can be moved transversely and the chambers can be controlled alternately to outside the slide part by the transverse movement of the channel part, the inlet side of the brake channel must be extended by stationary guide tubes for the successive, braked rolling rods for each chamber swivel tubes are provided, which inevitably follow the movements of the channel part or the chambers.

• Fig. 1 ein Bremsrinnen-Element einer mehrgliedrigen Bremsrinne in Seitenansicht nach der Lösung gemäß Patentanspruch 4,
• Fig. 2 einen vergrößerten Schnitt nach der Linie II-II in Fig. 1,
• Fig. 3 eine vergrößerte Schnittdarstellung nach Fig. 2 zur Darstellung von Auswerferstellungen,
• Fig. 4 eine zweiadrige Bremsrinne zur Anwendung beim sogenannten SLIT-Verfahren, in der Darstellungsweise etwa nach Fig. 2,
• Fig. 5a bis 5c ein Steuerschema zum Betätigen einer zweiadrigen Bremsrinne gemäß Fig. 4,
• Fig. 6 eine Darstellung der Zuführung der Walzstäbe für eine mehradrige Bremsrinne nach Fig. 4 und
• Fig. 7 ein Bremsrinnen-Element in der kinematischen Umkehr des Ausführurigsbeispieles nach Fig. 1 und 2 nach der Lösung gemäß Patentanspruch 3.

In the drawing, three exemplary embodiments of a brake trough according to the invention are shown, namely:

• 1 is a brake trough element of a multi-unit brake trough in side view according to the solution according to claim 4
• 2 is an enlarged section along the line II-II in Fig. 1,
• 3 is an enlarged sectional view of FIG. 2 to show ejector positions,
• 4 shows a two-wire brake trough for use in the so-called SLIT method, in the representation approximately according to FIG. 2,
• 5a to 5c, a control scheme for actuating a two-wire brake trough according to FIG. 4,
• Fig. 6 is an illustration of the supply of the rolling rods for a multi-core brake trough according to FIGS
• 7 shows a brake channel element in the kinematic reversal of the exemplary embodiment according to FIGS. 1 and 2 after the solution according to patent claim 3.

As shown in FIG. 1, the brake trough according to the invention consists of a plurality of individual elements A, B, C, etc. in close succession, the first brake trough element A, which, like element C, is only partially shown, at the beginning of FIG 2, partially shown cooling bed R is arranged. The stationary part of the cooling bed R has raised walls W for fastening the brake channel elements. First, the common drive for all brake channel elements is described. The common drive includes a pivot axis 3, which extends over the entire length of the brake channel and with which at least one drive lever 4 is rotatably connected. The piston rod 5 of a actuating cylinder 6 operated by pressure medium acts on this angle lever 4.

The actual brake channel comprises a plurality of pivoted levers 7, which are wedged onto the pivot axis 3 and which carry a channel part 8 with two downwardly open chambers 8 a 8 b at the lower end. In the illustrated central position of the pivot lever 7 or the channel parts 8, both chambers 8 a, 8 b are closed by a uniform, stationary slide part 9. The sliding surface of the sliding part 9 is curved in a circular arc in accordance with the circular movement of the channel part 8, i. H. the center of curvature of the sliding surface is the center line of the pivot axis 3. A slight play is set between the webs of the channel part 8 comprising the two chambers 8 a, 8 b and the sliding surface of the sliding part 9.

As is apparent in particular from Fig. 1, the fixed slip part 9 is held are arranged by outside each pivoted lever 7 hanging bars 10, which the Kühlbettwandungen W, W 'are attached with their upper ends to transverse webs and the movable runner section 8 in transverse slots S _(F ig. 3) reach through. The meaning of these transverse slots S is explained in more detail in connection with FIG. 3.

1 and 2 is designed for single-core operation of the upstream rolling mill, that is, the chambers 8 a and 8 b of the channel part 8 are alternately fed the rolling rods 1 and 1 a cut by rotating scissors in succession. The feed pipes for the rolling rods 1 and 1 a in front of the first channel element A and their special features will be explained later in connection with FIG. 6. It is assumed that the rod 1 a comes to rest due to the braking effect of the sliding part 9 and a web part of the channel part 8, the subsequent rod 1 a entering the chamber 8 b. To the end throw the rod 1, the channel part 8 is now cross-controlled by a pivoting movement of the pivot lever 7 clockwise as far as Fig. 3 shows. As a result, the chamber 8a leaves the cover area of the sliding part 9, so that the roller rod 1 can freely exit downwards and is fed via the inclined cooling bed walls W to the first catch of the cooling bed R. The rod 1a in the chamber 8b follows this transverse displacement of the channel part 8 to the left. If the pivot lever 7 or the channel part 8 returns to the central position according to FIG. 1, a next roller rod can enter the chamber 8 a, which is now closed again. The ejection position of the channel part 8 for the rod 1 a is indicated by dash-dotted lines in FIG. 3. In both ejector positions, the transverse slots S are - as can be seen in FIG. 3 for an ejector position - in a limit position in which the channel part 8 at most comes into contact with the suspension bolts 10, so that the chambers and thus the rolling stock located in these chambers are included Security the suspension bolts 10 happens at a distance. The minimum length of the transverse slots S thus corresponds at least to the entire transverse displacement path of the channel part 8.

4 to 6 corresponds in its design to the SLIT method used in the rolling mill, i. H. Rolling rods 1 with 1 a and 2 with 2 a are rolled together and separated by longitudinal slits. The embodiment according to FIG. 4 differs from that according to FIG. 2 in that the channel part 18 has four downwardly open chambers and two fixed slide parts 19 separated from one another by a free ejector space in a mirror-image arrangement, each in the center position of the channel part 18 shown seal an adjacent pair of chambers. In this case, each slider 19 is of course assigned its own hanging bolts 10. The pivot lever 17 is widened in accordance with the channel part 18.

The ejector chamber located between the slide parts 19 is divided into two halves by vertical, stationary separating bars 20 if the rolling rods released into this ejector chamber are to be fed to adjacent catches of the computing cooling bed R.

The mode of operation of a brake trough according to the invention for application of the SLIT method can best be seen from FIGS. 5 a to 5 c. 5 a shows the central position of the channel part 18 relative to the two slide parts 19, which form the common ejector space 21 between them. From a first coherently rolled double rod, the individual rods 1 and 1 a are fed to those chambers of the channel part 18 which are simultaneously opened when the channel part 18 is pivoted, as shown in FIG. 5 b. The rods 1 and 1 a, which have come to rest at the same time because of their simultaneous infeed, also emerge downwards in free fall. 5 b or in the middle position according to FIG. 5 a of the channel part 18, the separated two bars 2 and 2 a of a subsequent double bar are fed to the remaining two chambers. These rods are ejected in the other ejector position according to FIG. 5 c, after which a further pair of rods 1, 1 a can enter.

FIG. 6 shows the situation in front of a brake trough according to FIG. 4. _M recognizes treads or chambers 18a to 18d of the trough part 18 of a first brake trough element A shown schematically in FIG. 6 on the right (FIG. 1). The funnel-shaped design of the chambers can be seen on the inlet side. Upstream pivot tubes 23, 24, 25, 26 are provided for each chamber, which are mounted on the inlet side pivotally and are so connected to the outlet side of hinge bolt 28 on the trench portion 18, that each pivot tube follows the movement of the groove portion in the sense that the _S chwenkrohre constantly the chambers 18 a to 18 d assigned to them. On the inlet side in front of the swivel tubes 23 to 26, stationary guide tubes 29, 30, 31, 32 can be seen, the rolling rods 1, 1 a of a coherently rolled double rod entering the tubes 29 and 31, ie in the allocation of the chambers 18 a and 18 c. The next pair of wires is fed to the guide tubes 30, 32. The swivel tubes 23 to 26 are all shown pivoted from a straight-going middle position, roughly corresponding to the situation according to FIG. 5 c, in which the chambers 18 b and 18 d are still in the eject position for ejecting a preceding pair of rods, the chambers 18 a and 18 c are however closed for subsequent rods 1, 1 a.

For the exemplary embodiment according to FIGS. 2 and 3, of course, only two swivel tubes 23, 24 and two feed tubes 29, 30 are assigned to the brake channel.

7 shows the exemplary embodiment of the preferred solution with a sliding part 37 designed as a pendulum body in the central position, which can be periodically pivoted to the right and left about a pivot axis 33. This embodiment is also designed for two-wire operation and therefore has two trough parts 38, each with two downwardly open chambers 38a and 38b, which are attached to fixed arms 39 along their length. In the illustrated central position of the slide part 37, these chambers are closed by the circular sliding surface 37a of the slide part 37. The two ejector openings 40 of the sliding part are closed by the webs 38c of the channel parts 38. The principle of operation of a brake trough according to FIG. 7 corresponds in principle to that of the other exemplary embodiments with the difference that it is the slide part 37 provided with sliding surfaces, the ejector openings 40 of which alternately open the chambers 38a and 38b for ejecting the rolling rods that are running and come to rest. The ejector openings 40 can be arranged so close together that simultaneously running and ejected rods can occasionally get into the first two notches R1 and R2 of the cooling bed without deflection.

Claims (4)

1. brake trough for rolled bars, in particular round material, which run out of a roller mill at high speed, consisting of a trough part (8, 18, 38) which forms at least two adjacent troughs for lateral guidance of the rolling stock, and a sliding part (9, 19, 37), which forms sliding surfaces (37a) for the rolling stock, the channel part or the sliding part being adjustable transversely to the rolling stock relative to the other, fixed part in such a way that the rolling rods located in the running channels are alternately released from the running channels by the transverse movement to free fall are characterized in that the troughs of the trough part (8, 18, 38) are formed by two downwardly open chambers (8a, 8b) which, in the middle position of both parts which are movable relative to one another, are formed by the sliding surface (37a) of the sliding part (9 , 19, 37) are closed. 2. Brake trough according to claim 1, characterized by a plurality of provided with inlet funnels, in the manner of wire guide tube elements cascaded channel and slide parts (A, B) with a common drive (3 to 6) for one of the parts. 3. Brake trough according to claim 1 or 2, characterized in that the channel part forming the channel part (38) is stationary and the slide part (37) is movable transversely, the chambers (38a, 38b) of the channel part. - Are separated from each other by a web (38c) which, in the middle position of the sliding part, closes an ejector opening (40) assigned to both chambers within the sliding surface (37a) of the sliding part, the ejector opening being moved by the transverse movement the sliding part can be alternately controlled under one or the other chamber (Fig. 7). 4. _B remsrinne according to claim 1 or 2, characterized in that the sliding part (9, 19) stationary, and the channel part forming the channel part (8, 18) is transversely movable, the chambers (8a, 8b) by the transverse movement of the channel part are alternately controllable outside the sliding part, and that the inlet side of the brake trough in extension of stationary guide tubes (29, 30) for the successive, braked rolling rods for each chamber swivel tubes (23, 24) are provided, which respectively the movements of the trough part. inevitably follow the chambers (Fig. 1-6).

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