# US 2009/0260439 A1 · Device for the Ultrasound Testing of Hot Rolling Material

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- Number: US 2009/0260439 A1
- Document ID: US20090260439A1
- Status: Published application
- Kind: A1
- Application number: 11/992,245
- Filed: 2006-07-27
- Published: 2009-10-22
- Earliest claimed: 2005-09-20
- Assignees: Georgsmarienhütte GmbH
- Inventors: Axel Stuber; Peter Van Hullen
- Web page: https://patentgrep.com/patent/US20090260439A1

## CPC

- G01N 29/228: {related to high temperature conditions}
- G01N 29/043: {in the interior, e.g. by shear waves}
- G01N 29/11: by measuring attenuation of acoustic waves
- G01N 29/262: {by electronic orientation or focusing, e.g. with phased arrays (phased arrays per se G10K11/34)}
- G01N 29/27: by moving the material relative to a stationary sensor
- B21B 38/00: Methods or devices for measuring, {detecting or monitoring} specially adapted for metal-rolling mills, e.g. position detection, inspection of the product {(control devices or methods B21B37/00)}
- G01N 2291/106: one or more transducer arrays
- G01N 2291/2632: flat
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- B21B: ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B21, see B21C; bending by rolling B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B21H; pressure welding by means of a rolling mill B23K20/04)

## Abstract

The invention relates to a device for the ultrasound testing of hot rolling material during the rolling procedure in one of a plurality of rolling stands in a rolling train which are arranged one behind the other, comprising at least two rolls which leave a roll gap between them, there being associated with the rolls ultrasound testing heads which are arranged such that parts of the roll body itself serve as the path along which the ultrasound waves pass on their way to the rolling material to be tested in the roll gap, which is characterised in that the rolls provided with the ultrasound testing heads are adjustable, have a straight transverse profile and a diameter which is a multiple of the width of the roll gap, with the result that a large rolling angle (α) is provided, and these rolls are arranged in one of the first rolling stands of the rolling train.

## Claims

### Claim 1

A device for the ultrasound testing of hot rolling material during the rolling procedure in one of a plurality of rolling stands in a rolling train which are arranged one behind the other, comprising at least two rolls which leave a roll gap between them, there being associated with the rolls ultrasound testing heads which are arranged such that parts of the roll body itself serve as the path along which the ultrasound waves pass on their way to the rolling material to be tested in the roll gap, wherein the rolls (3) provided with the ultrasound testing heads (9, 10) are adjustable, have a straight transverse profile and a diameter which is a multiple of the width (2) of the roll gap, with the result that a large rolling angle (ci) is provided, and these rolls (3) are arranged in one of the first rolling stands of the rolling train.

### Claim 2 (depends on 1)

A device according to claim 1, wherein the rolls (3) are cantilever rolls in which the roll surfaces have, at least on one side, an annular attached part (7) which projects outwards from the disc 6.

### Claim 3 (depends on 1)

A device according to claim 1, wherein the ultrasound testing heads (9,10) are arranged on the side of the annular attached part (7) pointing towards the roll axis (4).

### Claim 4 (depends on 3)

A device according to claim 3, wherein the ultrasound waves are directed in a manner perpendicular to the rolling material surface in the roll gap (2).

### Claim 5 (depends on 4)

A device according to claim 4, wherein the ultrasound waves are directly obliquely towards to the rolling material surface in the roll gap (2).

### Claim 6 (depends on 1)

A device according to claim 1, wherein a plurality of ultrasound testing heads (9) are provided arranged in the manner of a matrix and connected to one another.

### Claim 7 (depends on 1)

A device according claim 1, wherein group emitters (10) are provided as the ultrasound testing heads.

### Claim 8 (depends on 1)

A device according to claim 1, wherein the rolling material (8) to be tested is held in a constant measuring position as it passes through by rolling fittings.

### Claim 9 (depends on 1)

A device according to claim 1, wherein the rolling material (8) to be tested is held in a constant measuring position as it passes through by rolling stands arranged upstream and/or downstream.