Method for longitudinal, transverse and oblique error testing of

Details Method for longitudinal, transverse and oblique error testing of Method for longitudinal, transverse and oblique error testing of

1993-06-23

1996-01-23

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73620, G01N 2904

Patent

active

054857511

ABSTRACT:
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.

REFERENCES:
patent: 4307612 (1981-12-01), Elsley et al.
patent: 4455872 (1984-06-01), Kossoff et al.
patent: 5335547 (1994-08-01), Nakajima et al.

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