Krautkrämer Gmbh & Co.

Mannesmann Aktiengesellschaft

Firma Krautkramer Gmbh & Co.

Bernhard Karbach

Reinhard Prause

Ottokar Patzke

Hans-Jurgen Bathmann

Harri Haacke

Manfried Schoenen

Gerd Kauth

Peter Steinert

Siegmar Schulz

Heinrich Weber

Ultrasonic measuring process for the wall thickness curve of a weld seam

The method for ultrasonic testing of work pieces to detect longitudinal, transverse and oblique errors therein uses a test head support having at least one test head. The test head support is moved in a translatory direction along a surface of the work piece. Ultrasonic impulses are generated in a rapid sequence by the test head, progress along a sound beam, and are directed to impact the surface of the work piece in test areas. All test areas of the at least one test head lie in a linear test path. In the case of uninterrupted, translatory movement, all test areas meet in one and the same test area. The sound beams progress in a given constant angle in relation to one set perpendicular line on each test area. The sound beams rotate, in a conical envelope, around the respective perpendicular line. A complete rotation of 360.degree. takes place in time t.sub.r which is shorter than time t.sub.t which is required by the translatory movement in order to cross a distance with the dimensions of a test area, per revolution generates and sounds at least ten ultrasound impulses into the surface of the work piece.

Method for longitudinal, transverse and oblique error testing of work

Ultrasonic test device

Along with an ultrasound test apparatus for elongated test specimens (20) having cross sections that are constant throughout their length, in particular pipes and rods, which pass longitudinally along a test line (24) and thereby pass through a test machine (28) which is arranged on the test line (24), a second test machine (34) is provided. Both test machines (28, 34) are arranged on a pivot mount (30) at some distance from each other, parallel to each other and rotated 180.degree. with respect to each other, rotatable by at least 180.degree. around an axis of rotation (38), the axis of rotation running at a right angle to the test line (24) and at some distance from it, so that in an initial rotation position of the pivot mount (30) the one test machine (28) is positioned on the test line (24) and the other test machine (34) can be changed over, and in the second rotation position the other test machine (34) is positioned on the test line ( 24) and the first test machine (28) can be changed over.

Ultrasound test apparatus for elongated test specimens having cross

Ultrasonic testing of elongated, prismshaped sections with at least one

An ultrasound testing device for the non-destructive testing of a workpiece wherein at least three testing heads are disposed on a testing head carrier, and the testing heads emit sound waves which converge at one or more intersections in an area of the workpiece so as to detect defects and determine the wall thickness. Operationally, the number of intersections is one less than the number of testing heads, and the separation between the sound waves is chosen so as to avoid the disturbances associated with utilization of oppositely situated testing heads. In addition, the device uses a flow medium to couple the testing heads to the surface of the workpiece.

Ultrasound testing device for the non-destructive testing of workpieces

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Erftstadt-Friesheim, Germany

Bernhard Karbach