EP2508300B1 - Device for grinding a casting product - Google Patents

Description

The invention relates to a device for grinding a continuous casting product, in particular a slab, wherein the continuous casting product has a longitudinal axis and in cross section a rectangular contour with two opposite long sides and two opposite short sides, wherein the device comprises at least one, preferably two grinding tools, the two opposite sides of the continuous casting product can grind.

A device of this kind is from the WO 2010/105839 A1 known. Continuously cast products, in particular slabs, are subjected to surface treatment by grinding after continuous casting in order to achieve a sufficient quality in the further processing of the product. When grinding the slabs, they are moved in a reciprocating motion under a grinding device (sanding unit) in the longitudinal direction back and forth. At the end of each reversing movement, the grinder performs a stepwise cross-feed motion until the entire slab surface is ground.

Not unproblematic is the handling of the slab. The grinding device with its usually two grinding wheels is normally formed, a vertically arranged surface of the slab or two opposing vertical grind arranged surfaces. If, first, the long and then the short sides of the slab are ground, the slab must accordingly be moved into the required processing position.

The invention has the object of providing a device of the type mentioned in such a way that it is possible in a simplified manner, to move the slab in the position required in each case and to keep it stable during grinding.

This object is achieved in that the device comprises a top beam and a lower beam having holding device which is adapted to tension the continuous casting product in two different positions and to hold during the grinding process, wherein the two different positions about the longitudinal axis of the continuous casting product 90 ° to each other are rotated, and wherein the upper beam and the lower beam are arranged on or in a frame scaffold, wherein at least one actuator engages the frame to pivot the frame framework including upper beam and lower beam about the axis of rotation or to rotate.

The two beams of the holding device are formed relative to each other in a direction perpendicular to the longitudinal axis braced against each other to stretch between them the continuous casting product. For bracing the upper beam and the lower beam, preferably at least one actuator, in particular a clamping cylinder, is effectively arranged between the upper beam and the lower beam.

Clamping elements, in particular clamping claws, can be arranged on the upper beam and / or on the lower beam, which are in particular arranged resiliently on the upper beam or on the lower beam. Hereby, the slab can be held securely.

On the upper beam or on the lower beam, further, pivotable clamping elements, in particular pivot arms, can be arranged in order to be able to tension the continuous casting product on both sides of the upper beam or the lower beam. This is particularly advantageous if the slab is to be held or tensioned in a horizontal position.

Furthermore, a swivel motor can effectively act on the framework, in order to pivot or rotate the framework including the upper beam and lower beam around the axis of rotation. This is particularly advantageous if the actuator has a dead spot where it can not exert any torque on the frame.

The holding device is preferably arranged on or in a traveling frame, which is arranged to be movable along a guide of the device in the direction of the longitudinal axis.

When slicing vertically arranged slab is preferably provided that the two opposite long sides of the continuous casting product are simultaneously ground by means of at least two grinding tools. The device accordingly preferably has two grinding devices, each with at least one grinding tool, which are designed and provided for the simultaneous processing of the two opposite sides of the continuous casting product.

The long side of the continuous casting product is usually at least twice as long as the short side, often even more than twice as long.

With the proposed embodiment of the device, it is possible to hold a slab in a simple and secure manner in order to grind the respectively opposite short or long sides. In particular, this makes it possible in a simple manner to hold the slab once in a vertical and even in a horizontal position or to tension in order to grind all four sides.

Fig. 1

eine Vorrichtung zum Schleifen eines Stranggussprodukts in Form einer Bramme, im Schnitt A-A gemäß Fig. 2;

Fig. 2

die Vorrichtung zum Schleifen der Bramme in einer Seitenansicht;

Fig. 3

die Vorrichtung zum Schleifen der Bramme in der Draufsicht;

Fig. 4

die Vorrichtung im Schnitt B-B gemäß Fig. 3 beim Schleifen der Hauptseiten, d. h. der langen Seiten der Bramme;

Fig. 5

die Vorrichtung im Schnitt B-B gemäß Fig. 3 beim Schleifen der Nebenseiten, d. h. der kurzen Seiten der Bramme;

Fig. 6

in der Seitenansicht eine Haltevorrichtung zum Halten der Bramme, wobei die Bramme in vertikaler Ausrichtung gespannt ist,

Fig. 7

die Haltevorrichtung gemäß Fig. 6, wobei eine Bramme in horizontaler Ausrichtung gespannt ist;

Fig. 8

die Haltevorrichtung gemäß Fig. 6 und Fig. 7 in der Draufsicht;

Fig. 9

eine Aufnahmesituation der Bramme in die Vorrichtung bei vertikal ausgerichteter Bramme zum Schleifen der Hauptseiten der Bramme, gesehen in Richtung der Längsachse der Bramme;

Fig. 10

eine Aufnahmesituation der Bramme in die Vorrichtung bei horizontal ausgerichteter Bramme zum Schleifen der Nebenseiten der Bramme, gesehen in Richtung der Längsachse der Bramme;

Fig. 11

schematisch die Darstellung eines Quertransports von Brammen vor der Aufnahme in die Haltevorrichtung, gesehen in Richtung der Längsachse der Bramme;

Fig. 12

eine Aufnahmesituation der Bramme in die Vorrichtung bei horizontal ausgerichteter Bramme, gesehen in Richtung der Längsachse der Bramme;

Fig. 13

eine andere Aufnahmesituation der Bramme in die Vorrichtung bei horizontal ausgerichteter Bramme, gesehen in Richtung der Längsachse der Bramme;

Fig. 14

eine Aufnahmesituation der Bramme in die Vorrichtung bei schräg ausgerichteter Bramme, gesehen in Richtung der Längsachse der Bramme; und

Fig. 15

eine andere Aufnahmesituation der Bramme in die Vorrichtung bei schräg ausgerichteter Bramme, gesehen in Richtung der Längsachse der Bramme.

In the drawings, embodiments of the invention are shown. Show it:

Fig. 1

a device for grinding a continuous casting product in the form of a slab, in section AA according to Fig. 2 ;

Fig. 2

the device for grinding the slab in a side view;

Fig. 3

the apparatus for grinding the slab in plan view;

Fig. 4

the device in section BB according to Fig. 3 when grinding the main sides, ie the long sides of the slab;

Fig. 5

the device in section BB according to Fig. 3 when grinding the minor sides, ie the short sides of the slab;

Fig. 6

in side view, a holding device for holding the slab, wherein the slab is stretched in a vertical orientation,

Fig. 7

the holding device according to Fig. 6 wherein a slab is tensioned in a horizontal orientation;

Fig. 8

the holding device according to Fig. 6 and Fig. 7 in the plan view;

Fig. 9

a picking situation of the slab in the device with vertically aligned slab for grinding the main sides of the slab, seen in the direction of the longitudinal axis of the slab;

Fig. 10

a picking situation of the slab in the device with horizontally oriented slab for grinding the side surfaces of the slab, seen in the direction of the longitudinal axis of the slab;

Fig. 11

schematically the representation of a transverse transport of slabs before receiving in the holding device, as seen in the direction of the longitudinal axis of the slab;

Fig. 12

a recording situation of the slab in the device with horizontally oriented slab, seen in the direction of the longitudinal axis of the slab;

Fig. 13

another recording situation of the slab in the device with horizontally oriented slab, seen in the direction of the longitudinal axis of the slab;

Fig. 14

a recording situation of the slab in the device with obliquely oriented slab, seen in the direction of the longitudinal axis of the slab; and

Fig. 15

another recording situation of the slab in the device with obliquely oriented slab, seen in the direction of the longitudinal axis of the slab.

In the FIGS. 1 to 5 In various views, a device for grinding a slab 1 is shown. The slab 1 has a rectangular cross-section which is in Fig. 1 you can see. It extends into Fig. 1 with its longitudinal axis in the direction perpendicular to the plane of the drawing. The slab 1 accordingly has two long or wide sides 2 and 3 and two short or narrow sides 4 and 5. The long sides 2, 3 are usually at least twice as long as the short sides 4, 5, as a rule even much longer.

The slab surface must be processed by means of a grinding process in order to finally be able to produce a product of sufficient quality from the slab. For this purpose, a grinding device is provided, which consists of the FIGS. 4 and 5 is particularly clear. The grinding tools are in the FIGS. 4 and 5 numbered 6 and 7.

In Fig. 4 It can be seen that the slab 1 must be held in a vertical position, designated I, for grinding the long sides 2 and 3. Opposite is in Fig. 5 to see that the slab 1 - to be able to grind the short sides 4 and 5 - must be stretched in a horizontal position marked 11.

Below the grinding tools 6, 7, a chip collecting container 19 can be positioned. The feeding of the grinding chips is done with baffles 20th

Details of a holding device 8, with which the slab 1 can be held in the desired position, are in the FIGS. 6 to 8 to recognize.

The holding device 8 comprises a top bar 9 and a bottom bar 10. The two bars 9, 10 can relative to each other in a direction perpendicular to the longitudinal axis L of the slab 1, are moved to stretch the slab 1 between them.

For the clamping, an actuator 11 is provided in the form of a clamping cylinder. Both the upper beam 9 and the lower beam 10 clamping elements 12 are arranged in the form of clamping or clamping claws. These can be suspended resiliently in order to be able to create a fitting fit to the slab 1 during the clamping process.

We clamped the slab 1 in the first position I, ie vertically aligned - s. For this Fig. 4 - Press the clamping claws 12 of the upper beam 9 from above and the lower beam 10 from below against the short sides 4 and 5 (s. Fig. 1 ), so that the slab 1 is held.

If the slab 1 in the second position II, as it is in Fig. 5 can be seen, come laterally next to the upper beam 9 and this articulately mounted clamping elements 13 in the form of pivoting arms used. Their design works best Fig. 6 and 7 out. The pivot arms 13, a number of which are arranged along the upper beam 9 in the direction of the longitudinal axis L, can be pivoted via an actuator 21, which transmits via a rod 22 its movement on the pivot arms 13. The actuator 21 may be hydraulically or electrically operated.

In Fig. 6 the pivot arms 13 are seen in their passive position. Meanwhile, the pivot arms 13 of the actuator 21 according to Fig. 7 have been moved to their active position, ie the pivot arms 13 press from the top of the long side of the slab 1. For a secure grip again clamping elements 23 in the form of clamping claws at the end of the pivot arms 13 are arranged.

It should also be noted that the entire holding device 8 - comprising the upper beam 9 and the lower beam 10 and a frame skeleton 14 holding this - is arranged in a traveling frame 17, the -. For this Fig. 1 to 3 - Is moved on a guide 18 in the direction of the longitudinal axis L.

By means of locking cylinders 26, the holding device 8 can be locked in the processing position relative to the driving frame 17. This is in any case to be provided when the holding device is designed to be pivotable relative to the driving frame, s. below. The locking cylinder 26 can operate hydraulically, pneumatically or electrically.

In Fig. 9 is a recording situation of the slab 1 sketched in the device with vertically aligned slab. Through an opening in the traveling frame 17, the slab 1 can be transferred vertically. The traveling frame 17 and the holding device 8 can have a fixed connection, ie no relative pivoting between the holding device 8 and the traveling frame is necessary when working according to this solution.

In Fig. 10 the loading of the holding device 8 for the grinding of the short sides of the slab 1 is outlined. The slab 1 can be brought from suitable tables 24 in the required position, to then be gripped and tensioned by the pivot arms 13 from above and the lower beam 10 from below. In Fig. 11 the transverse transport of the slabs is shown by means of tables 24 which can be displaced transversely to the longitudinal axis L.

In Fig. 12 is another recording situation of the slab 1 to see in the device with horizontally aligned slab. Here, the slab 1 is stretched between the upper beam 9 and the lower beam 10 in the manner mentioned. In this embodiment, however, it is provided that the entire framework 14, which carries the upper beam 9 and the lower beam 10, to a in the direction of the longitudinal axis L facing axis of rotation D is rotatable or pivotable.

For pivoting from the position in which the slab 1 is oriented horizontally in the position in which it is vertically aligned, an actuator 15 is provided which engages the frame structure 14 and pivots the holding device 8 about the axis of rotation D. In the synopsis with Fig. 6 and 7 It can be seen that for swiveling also a swivel motor 16 is present, which rotates about the axis of rotation D.

Accordingly, in this case can pass through an opening in the driving frame 17, the slab in a horizontal position or from a shelf (table 24) are added. The pivotable arrangement of the holding device 8 relative to the driving frame 17 allows the subsequent erection of the slab 1 from the horizontal to the vertical position.

In Fig. 13 the possibility is shown to record the slab 1 in respective horizontal positions optionally left or right of the lower beam 10 can.

This principle is in the solutions according to the FIGS. 14 and 15 designed a little further. According to these figures, the slab 1 is pivoted by means of a tilting table in an intermediate position, which lies between the horizontal and the vertical orientation. The holding device 8 takes over the slab 1 in this intermediate position and consequently has to pivot the slab 1 into the vertical alignment only over a pivot angle of less than 90 °. This saves time in positioning the slab in the grinder.

In Fig. 15 It can be seen that the slab handling can also be done so that the slab 1 is received below the grinding plane. The holding device 8 is then pivoted over an angle of more than 90 ° in the vertical orientation.

Another variant is also possible: It can be provided that the tilting table 25 can completely transfer the slab 1 from the horizontal orientation into the vertical orientation. As a result, pivoting of the holding device 8 can be completely dispensed with.

The traveling frame 17 preferably has only one longitudinal carrier, so that the holding device 8 can be pivoted in laterally during its assembly. The traveling frame has four wheels, two drives and guide rollers.

By clamping the slab 1 in the horizontal position by means of the pivot arms 13 and the lower beam 10 results in an advantageous three-point storage.

LIST OF REFERENCE NUMBERS

1

Continuous casting product (slab)

2

long page

3

long page

4

short page

5

short page

6

grinding tool

7

grinding tool

8th

holder

9

upper beam

10

lower beam

11

Actuator (clamping cylinder)

12

Clamping element (clamping claw)

13

Clamping element (swivel arm)

14

frame construction

15

actuator

16

swing motor

17

trial frame

18

guide

19

Chip collector

20

baffle

21

actuator

22

pole

23

Clamping element (clamping claw)

24

table

25

tilting table

26

lock cylinders

L

longitudinal axis

D

axis of rotation

I

1st position (vertical arrangement)

II

2nd position (horizontal arrangement)

Claims (6)

1. A device for grinding a continuously cast product (1), particularly a slab, wherein the continuously cast product (1) has a longitudinal axis (L) and a rectangular cross-sectional contour with two opposite long sides (2, 3) and two opposite short sides (4, 5), and wherein the device comprises at least one grinding tool, preferably two grinding tools (6, 7) that can grind two opposite sides (2, 3, 4, 5) of the continuously cast product (1),
   characterized in that
   the device comprises a holding device (8) that features an upper beam (9) and a lower beam (10) and is designed for bracing and holding the continuously cast product (1) in two different positions (I, II) during the grinding process, wherein the two different positions (I, II) are turned relative to one another by 90° about the longitudinal axis (L) of the continuously cast product (1), wherein the upper beam (9) and the lower beam (10) are arranged on or in a frame (14), and wherein at least one actuator (15) engages on the frame (14) in order to respectively pivot or turn the frame (14) about a rotational axis (D) together with the upper beam (9) and the lower beam (10).
2. The device according to Claim 1, characterized in that at least one actuator (11) is effectively arranged between the upper beam (9) and the lower beam (10) in order to brace the upper beam (9) and the lower beam (10).
3. The device according to Claim 1 or 2, characterized in that clamping elements (12) are arranged on the upper beam (9) and/or the lower beam (10), wherein said clamping elements are respectively arranged, in particular, elastically on the upper beam (9) or on the lower beam (10).
4. The device according to one of Claims 1 to 3, characterized in that pivotable tensioning elements (13) are arranged on the upper beam (9) or on the lower beam (10) in order to brace the continuously cast product (1) to both sides of the upper beam (9) or the lower beam (10).
5. The device according to Claim 1, characterized in that a pivoting motor (16) effectively engages on the frame (14) in order to respectively pivot or turn the frame (14) about the rotational axis (D) together with the upper beam (9) and the lower beam (10).
6. The device according to one of Claims 1 to 5, characterized in that the holding device (8) is arranged on or in a traveling frame (17) that can be displaced in the direction of the longitudinal axis (L) along a guide (18).

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