GB2166677A

GB2166677A - Braking channel apparatus for rolled bars

Info

Publication number: GB2166677A
Application number: GB08522376A
Authority: GB
Inventors: Werner Kejzlar; Gunter Estenfelder; Klaus Rist
Original assignee: Schwermaschinenbau Kombinat Ernst Thalmann VEB
Current assignee: Schwermaschinenbau Kombinat Ernst Thalmann VEB
Priority date: 1984-11-09
Filing date: 1985-09-10
Publication date: 1986-05-14
Also published as: GB2166677B; IT8521883A0; IT1221759B; DD229049A1; DE3522371A1; GB8522376D0

Abstract

Braking channel apparatus for feeding rolled bars, in particular bars of round material, onto a cooling bed 9, comprises a stationary guide unit 15 having travel passages 17a, 17b, 19a, 19b and one or two vertically movable slider units 21 which in one position relative to the guide unit 15 form four braking channels which are disposed in horizontally juxtaposed relationship and associated with which are four directly juxtaposed aligning channels 5, 6, 7, 8 of the cooling bed 9. <IMAGE>

Description

SPECIFICATION Braking channel apparatus for rolled bars The invention relates to a braking channel apparatus for feeding rolled bars, in particular bars of round material, onto a cooling bed, without a roller table and without forward motion.

It is known for the rolled bars coming from the rolling mill, in particular of round material, to be braked to a standstill in braking channels which are disposed above the cooling bed, and to be ejected onto the cooling bed which is located beneath the braking channels by the braking channels being opened.

In accordance with German patent specification No. 3 142 698, the bars which are rolled and cut in one strand are fed alternately to one of two jointly pivotable braking channels and, after they have been completely braked to a halt, they are successively ejected onto the first cooling bed channel, in accordance with the cooling bed cycle, correspondingly the bars which are rolled in a two-strand form, cut and moved in the same direction are alternately fed to respective pairs of four jointly pivotable braking channels, braked at the same time and ejected simultaneously in accordance with the cooling bed cycle, with one rolled bar always passing onto the first cooling bed channel and the other rolled bar always passing onto the second cooling bed channel.

The disadvantage of that braking channel apparatus is the limited through-put capability which is due to the braking times required for the rolled bars so that it is not possible to achieve very high finishing rolling speeds.

In relation to high-speed rolling, the incoming rolled bars arrive in very quick succession and can no longer be handled by the braking channel apparatus.

In relation to such successions of bars, there is also the disadvantage that the cycle times of the movable cooling bed rakes cannot be shortened as desired in order to move the rolled bars onto the cooling bed channels in the manner that is permitted by the arrangement of the above-mentioned braking channel apparatus.

The invention is based on the problem of so designing a braking channel apparatus, disposed above a cooling bed, for rolled bars, in particular of round material, comprising at least four braking channels which can be loaded alternately by way of feed tubes disposed at the intake side, in a simple manner such as to ensure a high through-put capability in order to satisfactorily introduce into said apparatus the rolled bars which arrive in large numbers from the upstream- disposed cutting apparatus, at high finishing rolling speeds, to brake same and to eject same from the stationary condition in an orderly manner onto the cooling bed, while avoiding high levels of loading on the cooling bed drive and the movable structural parts of the cooling bed by virtue of very short cycle times of the cooling bed rakes.

According to the present invention there is pro vided a braking channel apparatus for rolled bars, in particular bars of round material, disposed above a cooling bed and comprising at least four braking channels which can be alternately loaded by way of feed tubes disposed at the intake end, in which associated with a stationary guide unit hav ing travel passages for rolled bars are one or two vertically movable slider units which in one position relative to the guide unit form four braking channels which are disposed in horizontally juxta posed relationship and which are associated with four directly juxtaposed alignment channels of the cooling bed.

The guide unit may comprise a pair of spaced apart support walls which are disposed stationary and parallel to each other, with the mutually facing wall surfaces of the support walls each having a respective open upper travel passage and the wall surfaces which face away from each other each having an open lower travel passage with a holding flap for closing same laterally, wherein disposed between the support rollers is the slider unit in the form of a guide member which can be raised and lowered and in the side walls of which is provided a respective outwardly open lower travel passage.

The guide unit may also comprise a pair of spaced apart downwardly inclined open travel passages which are arranged stationary and parallel to each other, and a stationary channel portion which is disposed between the travel passages and which is of a roof-like configuration, with a respective travel passage which is fitted on each roof surface and which can be pivoted open in an eaves-like manner, wherein disposed in the longitudinal slots between the two stationary travel passages and the stationary channel portion are two slider units in the form of channel portions which can be raised and lowered, with a cross-section in the form of a pointed roof, by means of the roof surfaces of which, on the inside, the downwardly inclined extending roof surfaces of the stationary channel portion can be limited at the lower longitudinal edges and, on the outside, the stationary, downwardly inclined open travel passages can be closed off.

Two embodiments of the invention will now be described, by way of examples, with reference to the accompanying drawings; in which: Figure 1 is a view in diagrammatic cross-section in the region of a braking channel apparatus constituting a first embodiment.

Figures 2a to 2d show various operating steps in the apparatus shown in Figure 1.

Figure 3 is a diagrammatic cross-section similar to that shown in Figure 1, of a second embodiment, and Figures 4a to 4d show various operating steps in the apparatus shown in Figure 3.

Figure 1 shows a first embodiment of a braking channel apparatus according to the present invention which comprises pair of support walls 15 which are arranged in a stationary condition at a defined spacing from each other and the inside wall surfaces 16 of which each have an open upper travel passage 17a and 17b while the outer wall surfaces 18 thereof each have an open lower passage 19a and 19b with a holding flap 20 for closing them off sideways. Disposed between the support walls 15 is a guide member 21 which can be raised and lowered and whose side surfaces each have a respective outwardly open, lower travel passage 22a and 22b.

The mode of operation is as follows: The rolled bars which are cut to cooling bed length by shears pass, by way of switching means disposed downstream thereof, into feed tubes which are disposed upstream of the braking channel apparatus. The rolled bars are then alternatively transferred by two braking drivers (not shown), each having two travelling tracks, into the travel passages of the braking channel apparatus, the travel passages 17a and 19a being associated with the one braking driver and the travel passages 17b and 19b being associated with the other.

Figure 1 and Figures 2a and 2d show the individual phases of the braking operation.

The arriving rolled bars 10 to 14 are braked by the braking drivers and come to a halt, in accordance with the operating diagram shown in the above-indicated Figures.

The rolled bars 10 and 11 pass into the braking channels 1 and 2 from the channels which are closed on all sides and which are formed by the two upper travel passages 17a and 17b in the support walls 15 and side walls of the guide member 21. When then the braking channels 3 and 4 which are formed by the two lower passages 19a and 19b in the support walls 15 and the closed holding flaps 20 are filled with the rolled bars 12 and 13 which have come to a halt, by further downward movement of the guide member 21 and by simultaneously opening the holding flaps 20 by means of a drive (not shown herein), the rolled bars 10 to 13 are ejected jointly and simultaneously onto the four associated guide channels 5 to 8 of the cooling bed 9.

In the second embodiment illustrated in Figure 3 and Figures 4a to 4d, the braking channel apparatus comprises a pair of downwardly inclined open travel passages 23 which are disposed in a stationary condition parallel to each other and at a defined spacing from each other, and a stationary channel portion 24 which is disposed between said passages 23 and which is of a roof-like configuration, with a respective travel passage 26 which is disposed on each inclined roof surface 25 and which can be pivoted open at each side.

Disposed in the longitudinal slots between the two stationary passages 23 and the stationary channel portion 24 are two channel portions 27 which can be raised and lowered and which at this lower end are shaped in the form of an inverted V.

The inclined surfaces 28 thereof, on the inside, delimit the inclined surfaces 25 of stationary channel portion while on the outside they close off the stationary, downwardly inclined open passages 23.

From the channels which are closed on all sides and which in this case are formed by the passages 26 on the stationary channel portion 24 and the in dined surfaces 25 of the channel portion 24, the rolled bars 10 and 11 pass into the braking channels 1 and 2 by the channels 26 being pivoted open. The channel portions 27 which can be raised and lowered assume a position, in that operation, as shown in Figures 4a to 4c. The braking channels 3 and 4 are formed by the stationary downwardly inclined open passages 23 and the adjoining surfaces 28 of the vertical movable channel portions 27.When the braking channels 3 and 4 are filled with the rolled bars 12 which have also come to a halt, simultaneous downward movement of the two vertically movable channel portions 27 causes the rolled bars 10 to 13 to be jointly and simultaneously ejected into the four associated aligning channels 5 to 8 of the cooling bed 9, just as in the first embodiment.

The joint and simultaneous ejection of four rolled bars into the aligning channels makes it possible, from the sum of four feed times for the four rolled bars, to gain the time required to perform the necessary rake stroke movement over four aligning or cooling bed channels. That therefore ensures a high rate of through-put and rolled bars with a finishing rolling speed of 30 metres per second can be satisfactorily introduced into the braking channel apparatus according to the invention, braked and ejected onto the cooling bed, from the stationary condition.

In addition, the rake stroke movement over four aligning or cooling bed channels avoids very short cycle times in respect of the cooling bed rakes, and high levels of loading of the cooling bed drive and the movable structural components of the cooling bed cannot occur.

Claims

1. A braking channel apparatus for rolled bars, in particular bars of round material, disposed above a cooling bed and comprising at least four braking channels which can be alternately loaded by way of feed tubes disposed at the intake end, in which associated with a stationary guide unit having travel passages for rolled bars are one or two vertically movable slider units which in one position relative to the guide until form four braking channels which are disposed in horizontally juxtaposed relationship and which are associated with four directly juxtaposed alignment channels of the cooling bed.

2. A braking channel apparatus as claimed in claim 1, in which the guide unit comprises a pair of spaced apart support walls which are disposed stationary and parallel to each other and whose facing wall surfaces each have an open upper travel passage and whose wall surfaces which face away from each other each have an open lower travel passage with a holding flap for closing same in a sideways direction, and disposed between the support walls is a slider unit in the form of a guide member which can be raised and lowered and in the side walls of which are provided respective outwardly open lower travel passages.

3. A braking channel apparatus as claimed in claim 1, in which the guide unit comprises a pair of spaced apart downwardly inclined open travel passages which are arranged stationary and parallel to each other, and a stationary channel portion which is disposed between said travel passages and which is of a roof-like profile, with a travel passage disposed on each inclined surface, which travel passage can be pivoted open, and disposed in the longitudinal spaces formed between the two stationary passages and the stationary channel portion are two slider units having channel portions with a cross-section in the shape of an inverted V, which channel portions can be raised and lowered and by means of the inclined surfaces of which, on the inside, the inclined downwardly extending surfaces of the stationary channel portion can be delimited at the lower longitudinal edges and, on the outside, the stationary, downwardly inclined open passages closed off.

4. A braking channel apparatus for rolled bars substantially as hereinbefore described with reference to and as illustrated in Figures 1 and 2a to 2d or Figures 3 and 4a to 4d of the accompanying drawings.