Device for detection of defects in strips

2:

• The stoning device of claim 1, wherein the hard component comprises at least two parts of stone, ceramic, abrasive polymer, or emery paper.

3:

• The stoning device of claim 1, comprising from 2 to 5 hard components.

4:

• The stoning device of claim 1, wherein the carriage bearing a hard component is coupled to the drive system with a pivoting part allowing self-adjustment of the hard surface to the strip, preferably a ball joint, a spring suspension system, or flexible rubber.

5:

• The stoning device of claim 1, wherein the drive system configured to move the hard component towards the metal strip surface and away thereof and to apply a controlled contact pressure on the strip surface comprises a screw jack, a hydraulic cylinder, a gas cylinder, or a rack and pinion gear assembly.

6:

• The stoning device of claim 1, wherein the carriage is provided with a position or edge sensor.

7:

• The stoning device of claim 1, wherein the stoning device is computer- or PLC-controlled.

8:

• The stoning device according to claim 1, wherein the stoning device has a size less than 2 meters in a strip travel direction, preferably less than 1 meter.

9:

• The stoning device according to claim 1, further comprising a main frame having a “C” or “O” shape having at least one main beam on each side of the strip to support the carriages with their hard components and drive systems.

10:

• The stoning device of claim 9, wherein at least one beam of the “C”-shaped or “O”-shaped main frame is arranged to be translated or rotated out of a strip pathline in a standby location of the device.

11:

• The stoning device of claim 10, wherein, in case of “C”-shaped main frame, the beams are configured to be vertically rotated to achieve a “V”-opening.

12:

• The stoning device according to claim 1, wherein the stoning device is configured to be arranged to stone a portion of metal strip in vertical run, in horizontal run, or in oblique run.

13:

• The stoning device according to claim 1, wherein the means for moving transversally and back and forth at a defined speed the hard component bearing carriages with respect to the continuous motion direction of the strip comprises screw balls or sliding rails.

14:

• The stoning device according to claim 1, wherein the means for moving transversally and back and forth at a defined speed the hard component bearing carriage with respect to the continuous motion direction of the strip is arranged so as to permit each carriage to be driven separately, preferably by using a belt, a tooth belt, a cable, or a rack.