GRINDING DEVICE

Abstract

A device for grinding a continuously cast product, in particular a slab (11), a billet or a block. The Device has at least one rotationally operated abrasive disk (10), which is attached to a grinding head (15). At least one high-pressure air nozzle (14) is arranged on the grinding head (15). The high-pressure air nozzle blows the continuously cast product free of particles adhering to or lying on the continuously cast product prior to grinding.

Claims

1. A device for grinding a continuously cast product, the device comprising: a grinding head; at least one grinding wheel configured to be rotatingly operated the at least one grinding wheel being fastened to the grinding head; and at least one high-pressure air nozzle, which clears particles adhering to or lying on the surface of the continuously cast product before a grinding operation, the at least one high-pressure air nozzle being arranged on the grinding head.

2. A device in accordance with claim 1, further comprising another high-pressure air nozzle to provide at least two high-pressure air nozzles with the high-pressure air nozzles arranged on the grinding head on both sides of the grinding wheel or in the grinding wheel, so that at least one of the high-pressure air nozzles, which blows away particles before the grinding operation, can be operated in case of a change in grinding direction.

3. A device in accordance with claim 1, wherein the nozzle is arranged in relation to the grinding wheel such that the nozzle both blows away particles before the grinding operation and is used for the immediate blowing away of developing grinding dust.

4. A device in accordance with claim 1, wherein the high-pressure air nozzle generates an air pressure of at least 2×10.sup.5 Pa.

5. A device in accordance with claim 1, wherein the high-pressure air nozzle is configured as a flat blast nozzle and/or is configured for discharging air with an air outlet velocity of at least 100 m/sec.

6. A device in accordance with claim 2, wherein the nozzle is arranged in relation to the grinding wheel such that the nozzle both blows away particles before the grinding operation and blows away grinding dust developing during the grinding operation.

7. A device in accordance with claim 2, wherein the high-pressure air nozzle generates an air pressure of at least 2×10.sup.5 Pa.

8. A device in accordance with claim 3, wherein the high-pressure air nozzle generates an air pressure of at least 2×10.sup.5 Pa.

9. A device in accordance with claim 1, wherein the high-pressure air nozzle generates an air pressure of from 5×10.sup.5 Pa to 12×10.sup.6 Pa.

10. A device in accordance with claim 2, wherein the high-pressure air nozzle generates an air pressure of from 5×10.sup.5 Pa to 12×10.sup.6 Pa.

11. A device in accordance with claim 3, wherein the high-pressure air nozzle generates an air pressure of from 5×10.sup.5 Pa to 12×10.sup.6 Pa.

12. A device in accordance with claim 2, wherein the high-pressure air nozzle is configured as a flat blast nozzle and/or is configured for discharging air with an air outlet velocity of at least 100 m/sec.

13. A device in accordance with claim 3, wherein the high-pressure air nozzle is configured as a flat blast nozzle and/or is configured for discharging air with an air outlet velocity of at least 100 m/sec.

14. A device in accordance with claim 4, wherein the high-pressure air nozzle is configured as a flat blast nozzle and/or is configured for discharging air with an air outlet velocity of at least 100 m/sec.

15. A device in accordance with claim 1, wherein the high-pressure air nozzle is configured as a flat blast nozzle and/or is configured for discharging air with an air outlet velocity of at least 200 m/sec.

16. A device in accordance with claim 2, wherein the high-pressure air nozzle is configured as a flat blast nozzle and/or is configured for discharging air with an air outlet velocity of at least 200 m/sec.

17. A device in accordance with claim 3, wherein the high-pressure air nozzle is configured as a flat blast nozzle and/or is configured for discharging air with an air outlet velocity of at least 200 m/sec.

18. A device in accordance with claim 4, wherein the high-pressure air nozzle is configured as a flat blast nozzle and/or is configured for discharging air with an air outlet velocity of at least 200 m/sec.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In the drawings:

[0014] FIG. 1 is a schematic diagram for showing the grinding treatment of a slab known according to the state of the art;

[0015] FIG. 2 is a schematic diagram according to the present invention with an additionally used high-pressure air nozzle;

[0016] FIG. 3 is a schematic view of a first embodiment of a grinding head with a grinding wheel as well as with a single nozzle; and

[0017] FIG. 4 is a schematic view of a second embodiment of a grinding head with a grinding wheel and with two mounted high-pressure air nozzles.

DESCRIPTION OF PREFERRED EMBODIMENTS

[0018] Referring to the drawings, along the arrow 12 in the example shown until the grinding operation has been performed over the entire length of the slab. The slab 11 is then moved forward in the vertical direction towards the longitudinal axis in order to pass through the next grinding path in the direction of the longitudinal axis.

[0019] Remaining grinding particles or metal particles or dust particles as well as defect inclusions on the slab surface are shown by reference number 13.

[0020] According to the present invention and as can be seen in FIG. 2, the slab is moved in the direction of the arrow 12 during the grinding operation. The stationary grinding wheel 10 is located on a grinding head, not shown, which is additionally used as a holder for a nozzle 14, which is flattened toward the front side and forms a nozzle slot, from which air flows under high pressure. The air stream is directed such that it blows away particles and dust lying in front of the grinding wheel as well as grinding dust that is generated by the grinding operation during the abrasion of the grinding wheel.

[0021] As can be seen in FIG. 3, the grinding wheel 10 as well as the high-pressure air nozzle 14 are fastened to a grinding head 15.

[0022] The relative direction of forward motion of the grinding head in relation to the slab 11 is identified by the arrow 16.

[0023] The embodiment according to FIG. 4 differs from the embodiment described above in that two high-pressure air nozzles 141 and 142 are provided, which are arranged on both sides offset to the grinding wheel 10 and which are operated alternatingly, so that the movements of the grinding wheel in relation to the slab take place in two directions (see double arrow 17). Compressed air is applied to each high-pressure air nozzle, which in a slightly offset manner clears unprocessed grinding areas as well as developing grinding dust. The exiting air flow is identified by reference number 18.

[0024] While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.