DE2353215A1 - DEVICE AND METHOD FOR TREATMENT OF METAL SLABS - Google Patents

Description

DIPL.-ING. HANS WlEMUTH «DÜSSELDORF 11

DIPL.-ING. PETER.- C. SROKA -DOMlKiKANERStR-W ₁ POST COMPARTMENT *

PATENT LAWYERS. phone (0211) 574022

TELEGR. PATENTBRYDGES DÜSSELDORF

_ Postal check COLOGNE 1100 52-508

-. ' 235 3215 DRESDNER BANK (BLZ. 30080000) 2 536

COMMERZBANK (BLZ, 300 400 00) 3 609989 DEUTSCHE BANK (BLZ. 300 700 10) 6 498

October 22, 1973

YOUR SIGN:

MY CHARACTER: 1-4397 - 14/13

A.F. Industries, Inc.

Pittsburgh ^ Pennsylvania 15237 / USA

Device and method for the treatment of metal slabs

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The invention relates to an apparatus and a method for the treatment or processing of metal slabs or blocks, in particular for treating or processing the surfaces of such metal slabs or blocks.

Due to the increasing demand for metal products, where there are close tolerances in terms of both their chemical and physical properties must be observed, it has proven to be necessary to treat the metal in the half-finished state, resp. subject to processing to ensure that the metal is in a suitable condition for further processing stages; it is to be avoided that in the after finishing the metal, excessive amounts of scrap metal attack. The treatment · or processing mainly relates to bug removal

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on and in the surface of metal slabs, blocks, etc. the like., since such errors, if they are not eliminated, damage, for example, in subsequent rolling devices can evoke. These defects or defects can continue to give rise to serious physical Defects in the metal subjected to a rolling process, making this metal unsuitable for further processing will. -

In particular in steel production, such problems arise that surface treatment or processing make the metal necessary. The main technique used to remove surface flaws or defects in the case of half-finished metal grams, cheeks and the like, that is Scaling off or burning off. The scaling consists in, in particular to blow oxygen and gas onto the steel surface by means of a torch in order to oxidize the steel and thereby generating elevated temperatures which cause the oxidized product and adjacent quantities of steel to liquefy - only to be blown away. To a lesser extent A surface treatment or processing of steel, in particular torsion-resistant steel, is also carried out Grinding and chipping by hand.

'The scaling is normally carried out by a work ^, which, standing on the steel slab or the steel block, handles a burner suitable for scaling.

For this, however, it is a prerequisite that the slab or the block has cooled sufficiently so that the worker can can move on it. If the one slab or block surface is finished treated or processed, the slab or the block is lifted by means of a crane, turned and deposited again on the already treated side, so that the next surface is then subjected to a scaling process can be. Slabs or ingots of the type in question can weigh up to 40 t or more, so that

Turning over is time-consuming and extremely dangerous. By The scaling continues to produce hot and noxious fumes, causing harm to the health of those used Workers can lead. Because of the extremely heavy physical work, the worker is quickly tired, so that labor productivity is reduced.

Recently, automatic scaling plants in connection with rolling mills have been installed in some plants. Automatic scaling plants consist of a number of burners suitable for scaling, which are arranged so that they form a passage for the slabs. In this way it is possible to treat or scale down the steel while it is hot. Such automatic treatment devices, however, result in an indiscriminate treatment of the metal, so that metal losses of up to 4-5% occur, depending on the size of the slab or ingot and depending on the depth of scaling.

Further attempts have been made to avoid such To mechanize scaling processes, see for example US Pat. No. 3,176,971. However, this document contains no indications for a solution to the problems, which occur during the scaling of heavy slabs or blocks, the known device not readily either is adaptable to the conditions necessary when scaling slabs or blocks.

The invention is based on the object of an automatic device for treatment or processing which is improved in comparison of metal slabs, whereby not only a better scaling result should be achieved, but at the same time also the greatest emphasis on the security of the Workers should be laid.

The device according to the invention is used to achieve this object characterized by a base frame, two independent

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mutually pivotable reversible plates which are articulated on the base frame in such a way that they approach each other and again zurückver are pivotable to a metal slab of the one to be able to pass to the other insert, separate drive units for each of the two inserts, and one Working platform provided with a tool, which is rotatably suspended over the turning plates and can be moved along the same is.

The method according to the invention is characterized in that

a) a metal slab of a first pivotable support or Insert is fed,

b) this first support or turning plate is pivoted up in this way becomes that the surface of the metal slabs has an inclined Takes a stand,

c) along this metal slab surface a treatment or Editing tool for selective editing of the Metal slab surface is movable,

d) the metal slab then moves from the first supporting or turning plate to a second pivotable supporting or rotating plate. Insert is transferred,

e) this second support or turning plate is pivoted in this way is that the original underside of the metal slab is now directed upwards and an inclined position occupies

f) a treatment or processing tool for selective Processing of this metal slab surface is moved along the same, and

g) the metal slab from the second support or turning plate is delivered to another conveyor.

Further advantageous features are in the subclaims and result from the following description in Connection with the drawings. Show it:

Fig. Ί partially in section a side view of the invention Contraption; '

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2 shows a plan view of the device according to the invention;

Fig. 3 partially in section a part of the invention Device with a raised in the working position Slab and the working platform j

4 to 6 side views to illustrate the sequence of movements when handing over a slab from a first Turning plate of the device according to the invention, to a second turning plate; ·

FIG. 7 shows a view corresponding to the representation in FIG. 3 with the metal slab resting on the second turning plate;

Fig. 8 is a view, partially in section, of part of the device according to the invention during the transfer. a metal slab to another associated conveyor;

9 shows a sectional view along the line IX-IX in FIG. 2;

FIG. 10 shows, in an enlarged illustration, a sectional view according to FIG the line X-X in Fig. 1 »and:

11 shows, partially in section, a side view of the device according to the invention with one in a vertical position held metal slab, which is subjected to a cooling or quenching process.

In Figs. 1 and 2 is a substantially I-shaped pit 10 shown, which is mounted in the floor 12 of an establishment is. The side walls of the pit 10, like the pit floor 14, are provided with a concrete lining. A rectangular one aueT concrete existing bridge 16, the surface of which is in one level with the floor 12 of the company is bridged the pit in the area of the web of the I-profile. A elongated rectangular base frame 18 is of the Bridge 16 and the one on both sides of the base frame extending portions of the floor 12 worn. That , Fixed and thick-walled base frame 18 has two middle ones, extending in the longitudinal direction of the base frame 18 Support 20 with Η profile. The side edges of the base frame 18 protrude beyond the bridge 16. The open parts of the

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Pit 10 on each side of the bridge 16 are removable through Floor panels 22 are covered, which extend from the floor 12 to the protruding side edges of the base frame 18. .

The device 23 for treatment is on the base frame 18 or processing of metal slabs stored. The device 23 has two inserts 1 and 2. Because the inserts and 2 are essentially identical in construction with the exception of a few differences to be described below, only insert 1 is written »

The insert 1 has a frame 24 which has two spaced apart strong longitudinal members 26 and 28 with an I-profile. The side members 26 and 28 are connected by cross members 30, 32, 34 and 36, which also have an I-profile. The frame 24 supports the cover plates 37. On the cover plates 37 34 and 36 wear plates 38, 42 or 4O ₉ »44 are in the longitudinal direction above the cross members 30, 32 attached. The wear plates 38 j 40 ₉ 42 and 44 serve as bases for a slab lying on the turning plate 1.

Off the center line of each cross member 30, 32, 34 and. 36 are on the side member 26 (near the center line of the base frame 18) in one line stops 46, 48, 50 and 52 attached for the slabs. The stops 46, 48, 50 and 52 are made of strong profile material with side surfaces of different heights; each stop has two im Spaced transverse stiffening elements, the dia Connect side surfaces of the stop to one another, the higher side surface being the contact surface 54 of each stop forms. The slab stops of the insert 2 are offset in a corresponding manner on the other side of the center line attached to the respective cross member. This opposite and offset arrangement of the slab stops makes it possible that they can cooperate in the transfer of the slabs when the inserts 1 and

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be brought into a parallel position to each other.

The insert is near the center line of the base frame 18 mounted pivotably along one edge in four pivot points. These pivot points are in the area the connection points of the cross members 30, 32, 34 and 36 with the longitudinal beam 26. As the type of articulation * or pivot points is identical, will be referred to below with reference to FIG Fig; 10 only the construction lying in the area of the cross member 30 described. Of the cross member 30 is shown in FIG. 1, a part of the lower flange and the web of the I-profile cut away. A horizontal plate 56 is attached to the remaining part of the web of the cross member 30. At the underside of the plate 56 is a support plate 58 by means Bolt 60 attached. On the underside of the support plate 58 is a bearing plate 62 extending vertically downward attached, which is provided with an opening (not provided with reference numerals). The opening of the bearing plate 62 takes a bronze bushing (not shown). A storage stand 64 is mounted on the base frame 18 and has a carrier with Η-profile and a support plate 68 fastened thereon. On the support plate 68 are on both sides of the bearing plate Stand plates 70 arranged parallel to one another are mounted. The stand plates 70 are not provided with reference numerals Provided openings which are aligned with the opening of the bearing plate 62. The openings of the stand plates 70 and the Bearing plate 62 and / or the one arranged in this bearing plate Bushing receive a journal 69. The journal 69 is held by means of a driving pin. In this way, the bearing plate 62 (and thus the insert 1) is around the Axle pin 69 pivotable.

The turning plate 1 is pivoted by means of two hydraulic lifting cylinders 74, which are arranged under the two central cross members 32 and 34. Each cylinder 74 is articulated in the region of its upper cylinder end to the parts of the base frame 18 protruding over the bridge 16

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and extends through an opening in the base frame 18 into the pit 10. Each cylinder 74 is provided with bearing lugs 76 which are arranged on both sides of the cylinder housing and are provided with trunnions (not shown) carried by upright bearing blocks 78, which are mounted on the base frame 18. The ends of the piston rods 80 associated with the cylinders 74 are in use hinged by brackets on the underside of the associated cross member 32 and 34, as shown schematically at 82 in FIG. 1 is shown. When the cylinders 74 are loaded and the piston rods 80 are extended, the ends of the pivot Piston rods 80 around their respective articulation points on the turning plate 1, when these are out of their normal position, shown in FIG. 1 horizontal position shown is moved to the vertical position. At the same time, the cylinders 74 lead in their area Bearing points on the base frame 18 from a pivoting movement, so that the lower ends of the cylinder 74 are in the pit 10, following an arc, move away from bridge 16. The pivotable mounting of the cylinder 74 enables the Turning plate 1 depending on the length of the cylinder beyond the vertical by an angle which is greater than 90 °, to pivot.

Lie on the two outer edges of the insert 1 in line with the cylinders 74 shock absorbers 83. Each shock absorber 83 includes, as shown in FIG. 9, a vertical tube 84, which is mounted on the base frame 18 by means of a bearing plate 86 and supported by means of side claws 88. The tube 84 receives a helical spring 90 on which a circular push rod 92 rests, the upper end of which rests with it a console 94 is closed. The bumper 92 is telescoped within the tube 84 and normally protrudes up out of the tube 84 «, the edge or the corner the insert 1 is carried by the console 94. The shock absorber 83 serves as a buffer when carrying a slab Insert 1 is lowered into the horizontal position.

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_O be a function of the local conditions, the inventive apparatus may be a crane support or on the center line between two adjacent buildings arranged in the latter case, the inventive device 23 may for the treatment or processing of the slab as a means for transporting slabs from the a Building can be viewed in the other building. In any case, a control platform 25 is suspended above the device 23, which can be moved in the longitudinal direction along the center line of the base frame 18.

Referring to FIG. 1, the control platform includes an encapsulated air-conditioned cockpit 96 suspended above the device 23. The pulpit.96 is used to accommodate an operator j to control the movement sequences of the device according to the invention and to. monitor "The pulpit 96 is adjustable in the vertical direction by means of hydraulic or electrical lifting devices 98, which are arranged between the pulpit 96 and a pulpit holder 100." The vertical adjustment of the pulpit can also be achieved by other suitable measures. The pulpit holder 100 is fastened to a slide 102 such that it can rotate through at least 180 ° * but preferably 270 ° _f. The carriage 102 runs in transverse rails 104 so that it can be moved laterally. The rails 104, in turn, can be moved along the longitudinal beams 106 by means of the rollers 108. Flexible lines 110, 112 and 114 for electrical energy, oxygen and fuel? Each line is provided with a swivel joint connection 116 within the rotatably mounted slide 106. The lines 110 ₉ 112 and 114 can run off reels or be suspended above the longitudinal beams = in FIG. 1

an overhead crane hook 118 is also shown from which an electromagnet 120 is suspended, moved as close as possible to the pulpit 96. In the lower area of the cockpit 96, a tool 122, in this case, a burner is - ₉ for the treatment of orkpiece ¥ © E rotatably mounted, the tool 122 may be in the erforderlichen- manner sitting on the in the pulpit 96

Operator can be controlled and monitored.

A typical operating sequence of the device according to the invention is described below with reference to FIGS. 1 to 7. At the start of operations, the pulpit is in the Position 1 (see FIG. 2), to be precise sufficiently far away from the device 23 according to the invention and each slab any length that is suitable for treatment purposes on the invention Device is stored. The pulpit position 1 is adjacent to the control station 124, which has the necessary control devices for actuating the device 23 according to the invention. The control station 124 enables the operator to to operate the individual control devices without leaving their place in the pulpit 96. A similar The control station 126 is located at the other end of the device 22 according to the invention in the area of the cockpit position 2.

Metal slabs or metal blocks which are to be subjected to a treatment are fed to the treatment device according to the invention via the conveyor table 128. In order to facilitate the movement of the slabs or blocks on the conveyor table 128, this is provided with rollers or other suitable conveyor elements. If the turning plates 1 and 2 are in the horizontal positions shown in FIG. 1, the magnet 120 picks up a first metal slab 130 from the conveyor table 128 and places it in a horizontal position on the turning plate 1, one longitudinal edge of the slab against the contact surfaces 54 of the stops 46, 48, 50 and 52 come to rest. Instead of a crane and a magnet, other devices can be used to feed the slabs to the turning plate 1, for example tables with rollers or air bearings can be used.

After the first slab 130 has been deposited on the turning plate 1, the lifting cylinder 74 of the turning plate 1 is actuated in order to raise the slab by about 45 ° into an inclined position (see FIG. 3).

The pulpit 96 is then moved into such a position that that the treatment tool 122 is directed substantially perpendicularly against the inclined surface of the slab 130 is (see fully marked position in Fig. 3). the The pulpit 96 is then moved approximately above the center line of the base frame 18 along the slab 130. During the Moving the pulpit 96, the treatment tool 122 can substantially its relative working position with respect to the inclined Maintaining the surface of the slab 130 by first changing the position of the pulpit by means of the pulpit lifting devices 98 can be controlled or changed in the vertical direction and secondly by means of the carriage 102 in the lateral direction can. Maintaining this relative position is particular for treatment steps such as scaling or descaling, Grinding, stock removal and checking are essential, in which the slab surface from the operator in the vicinity Eye must be kept. The work will continue through this facilitates that the treatment tool 122 is pivotable is, so that the tool 122 is within the dash-dotted line in FIG Work positions is adjustable.

An essential advantage of the device according to the invention is that the treatment or machining can be carried out with an inclined workpiece surface. With such an arrangement, the residues, for example slag formed during scaling, slide down along the slab surface and fall onto the floor below, from where the residue can be easily removed. In this way, the operator always has a clean slab surface for inspection purposes before your eyes. '.-

If the treatment or processing of the surface of the Slab 130 is finished after the pulpit 96 once or has been traversed several times along the slab, wildly Move pulpit 96 into either pulpit position 1 or pulpit position 2. These positions are far enough from the treatment device 23 according to the invention and thereon

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removed slabs "After reaching one of these In both positions, the lifting cylinder 74 of the insert 2 is actuated to move the insert 2 in the direction of the insert 1 to pivot until the insert 2 has exceeded the vertical position and has reached a position that is around is about 100 ° angularly offset from the horizontal starting position (see Fig. 4). During the pivoting of the insert 2, the insert 1 maintains its inclined position. Afterward the lifting cylinders 74 of the insert 1 are actuated, in order to pivot it in the direction of the insert 2. If the inserts 1 and 2 are essentially one assume a parallel relative position (see FIG. 5), the surface of the slab 130 lies in close proximity to the wear plates 38, 40, 42 and 44 of the insert 2, with the entire slab weight on the stops 46, 48, 50 and 52 of the insert 1 rests. It should be noted that in this position, the slab stops of the insert 1 slightly over the slab stops of the insert 2 lie. Also the staggered positions of the slab stops on the opposite one Indexable inserts allow an overlap and thus the close approximation of the surface of the slab 130 to the Wear plates of the turning plate 2. In this way, an extremely "soft transfer" of the slab 130 to the Insert 2 guaranteed.

The lifting cylinders are then both of the insert 1 as well as the insert 2 actuated, so that a common movement of the two inserts in the direction of the horizontal Starting position of the insert 2 is carried out, the two inserts essentially their parallel Maintain relative position. When the inserts are approximately in a vertical position, the contact surfaces 54 are Slab stops of both inserts essentially in a horizontal plane, so that the slab stops of the insert 2 also support the slab 130. With the continued simultaneous pivoting of the two inserts counterclockwise (based for example on the

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5 and 6) the slab stops of the insert 2 Raised over the stops of the insert 1, so that the slab stops of the insert 2, the entire load of the Pick up slab 130. In this position, the insert 1 is only used to stabilize the slab 130. After the Turning plate 1 has pivoted slightly more than 90 ° from its horizontal starting position, the movement the insert 1 finished while the insert 2 is its Downward pivoting movement continues until what is now the top the slab 130 is inclined by approximately 45 ° to the horizontal (see FIG. 6). At the same time, the insert 1 to Picking up a new slab in the horizontal starting position .swiveled back.

The pulpit is then rotated 180 ° around the tool 122 to bring into the correct working position according to FIG. By Moving the pulpit over the slab 130 and actuating the tool is now a treatment or processing the second surface of the slab 130 is possible. If 'this treatment or processing is completed, the pulpit 96 is either in the pulpit position 1 or in the pulpit position 2 pulled back. The downward pivoting movement of the insert 2 is then continued until it is in its horizontal position occupies (see Fig. 8). The slab 13o is then lifted off the turning plate 2 by means of the magnet and opened A second conveyor table 132 is deposited, which has essentially the same construction as the conveyor table 128. Then the slab 130 is moved away from the treatment device 23 according to the invention for further processing « The entire workflow described can now be repeated with a second slab. Eg is to be mentioned that one or more cranes can be used to support a magnet 120, these devices being preferred can be operated independently of one another from the pulpit 96 « In this way there is the possibility of., 'Already during the Machining of the first slab a second slab on the turning plate 1 which has been pivoted back into the horizontal starting position

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to discard. In this way, the time required for loading and unloading the slabs is practically entirely within the actual treatment or processing time.

From the description it can be seen that the operator in the cockpit 96 is able, for example perform a difficult scaling process on a hot slab. This process can be done without that the operator is exposed to heat and harmful smoking, the turning of the slabs is possible without that this must be lifted in a dangerous manner, as is usually the case. The operator still has not to do heavy physical labor, so that the

Labor productivity can be increased. As this is editing
tool stored mechanically and not have to be held in hand as usual, larger, more effective tools can be used.

Another advantage of the treatment device according to the invention is achieved if this is, for example, the exit table a continuous slab forming device is downstream. Usually slabs are sheared after leaving a continuous forming device have been stored horizontally on a rail car and driven into the outside air to be air-cooled will. This air cooling can take several days and, due to the different cooling speeds, one directly exposed to the air slab surface compared to a Slab surface facing another hot slab, often "bulging" of the slabs occurs. A bulging or "curved slab is difficult to process, so that an additional work step is often required to make the slab workable again do.

In contrast, the treatment device according to the invention can be used as a cooling device for hot slabs.

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According to FIGS. 2 and 11, both inserts can have several Have water lines 134 with water spray nozzles 136, the can be of known design and are distributed at regular intervals over the respective area. In this case you can the cover plates 37 and some others of those below Longitudinal and cross members can be omitted if necessary. According to FIG. 11, a slab 138 is pivoted together the inserts 1 and 2 in a vertical position brought. In this position, the spray nozzles 136 are aimed directly against the large flat surfaces of the slab 138, so that cooling water can be sprayed evenly on these surfaces. By having both large surfaces of the slab 138 are exposed to coolant for the same length of time and evenly, uniform cooling is achieved, see above that a bulging of the slab is reduced or completely prevented will.

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Claims (9)

Claims (1.J device for the treatment or processing of metal slabs, characterized by a base frame (18), two reversible inserts (1, 2) that can be pivoted independently of one another, which are hinged to the base frame (18) in such a way that they can be pivoted towards each other and back again to a Metal slab (130) from one insert to the other to be able to transfer separate drive units (74) for each of the two inserts (1, 2), and one with a Tool (122) provided work platform, which is rotatably suspended over the turning plates (1, 2) and along the same is movable. 2. Apparatus according to claim 1, characterized in that the working platform in the vertical direction and based on the center line between the pivot axes of the inserts (1, 2), in the longitudinal direction of this center line and perpendicular is movable for this purpose. 3. Device according to claim 1 or 2, characterized in that that the drive units (24) are lifting cylinders, which are both on the base plate (18) and on the associated turning plate (1 or 2) are hinged. 4. Device according to one of claims 1 to 3> characterized in that that each insert (1, 2) from a horizontal starting position by an angle of more than 90 ° in the direction is pivotable on the other insert. 5. Device according to one of claims 1 to 4, characterized in that each ¥ end plate has a frame (24) and slab stops (46 ₅ 48 _P 5O ₉ 52) ,, which in the area of the pivoting of the Ifend plate perpendicular to ^; the frame plane is directed upwards .sindo 409821/0759 6. Apparatus according to claim 5 »characterized in that the stops of one insert opposite the stops the other insert are laterally offset. 7. Device according to one of claims 1 to 6, characterized in that that the working platform is suspended from the side members (106) located above the turning plates such that the working platform in a vertical plane through the center line between the pivot axes of the indexable plates lies. 8. Apparatus according to claim I _1, characterized in that the
is. the platform can be rotated or pivoted by at least 270 ° 9. Device according to one of claims 1 to 8, characterized in that that the reversible plates with spray devices (136) for the simultaneous spraying of a treatment liquid onto the two main surfaces of a metal slab (138) are provided, which is supported in a vertical position by the two indexable plates. 1O. Process for the treatment or processing of metal slabs, characterized in that a) a metal slab of a first pivotable support or Insert (1) is fed, b) this first support or turning plate is pivoted up in this way becomes that the surface of the metal slab assumes an inclined position, c) along this metal slab surface a treatment or processing tool for selective processing of the Metal slab surface is movable, d) then remove the metal slab from the first support or Turning plate is transferred to a second pivotable support or turning plate, ". 409821/07 59 e) this second support or turning plate is pivoted in this way that the original underside of the metal slab is now directed upwards and assumes an inclined position, f) a treatment or processing tool for the selective processing of this metal bra mm enfla before along
the same is done, and ' g) the metal slab is delivered from the second support or turning plate to a further conveyor device
will. 409821/0759 L e r s e i t e