SU1226285A1 - Test piece for adjustment of ultrasonic flaw detectors - Google Patents

Abstract

The invention relates to means of testing and measuring and can be used in ultrasonic testing, for example, of glued products with defects of non-adhesive type. The purpose of the invention is to increase the reliability of the setting. The sample contains acoustically connected and detachable plates. In the intermediate and in one of the outer plates are holes. The hole in the outer plate is designed to drain the contact fluid from the hole in the intermediate plate. Moreover, the transverse dimensions of the hole in the outer plate is chosen in the range of 0.01-0.1 from the transverse dimensions of the hole in the intermediate plate. In the course of tuning, Lamb waves are excited from the surface of the outer plate without opening in the intermediate plate and receive signals from the sample at a predetermined measurement base, measure the amplitudes of the signals in the defect-free area and in the area with a hole-like defect and reduce the last amplitude make the setting. 1 il. g

Description

one

The invention relates to means of testing and measuring and can be used in ultrasonic testing, for example, of glued products with defects of non-adhesive type.

The purpose of the invention is to improve the reliability of the settings and ease of use,

The drawing shows a sample for tuning ultrasonic flaw detectors, front view in section. The sample contains connected detachable and acoustically connected plates 1-3, and in the plates 2 and 3 holes 4 and 5 are filled in, respectively. The lateral dimensions of the hole 5 in the plate 3 are chosen in the range of 0.01-0.1 from the transverse dimensions of the hole 4 in the plate 2. The hole 5 serves to drain the contact fluid 6 from the hole 4, and the choice of the sizes of the hole 5 from the indicated ratio makes it impossible the effect on the amplitude of the signal received in the process of setting up ultrasonic flaw detectors.

The sample works as follows.

From the surface of the plate 1, using the emitter and receiving transducers connected to the flaw detector, emit ultrasonic vibrations into the sample at an angle that excites Lamb water in the plate 2 and receives signals at a predetermined measurement base. The amplitudes of the signals received in the defect-free area of the sample and in the area with a defect in the form of an aperture 4 in plate 2 are measured.

262852

reduce the amplitude set flaw detector. If necessary, adjusting for another defect plate 2 can be replaced by another one with a 5. Defect of a different size.

Thus, the sample for tuning ultrasonic flaw detectors makes it possible to increase the accuracy of the setting when testing glued products due to the fact that the adhesive layer is imitated by a plate of solid material of a given thickness, and a non-overlaid defect is simulated by a hole made with high accuracy, which ensures that the parameters sample during operation and ease of operation due to the possibility of replacing the defect plate with another one that has a defect of other sizes.

ten

15

20

Claims (1)

Invention Formula A sample for setting up ultrasonic flaw detectors containing two acoustically connected plates, one of which has a defect in the form of a through hole, characterized in that, in order to increase the reliability of the setting and ease of operation, the sample is provided with a second plate with a through hole contacting with the first plate with a hole, and the connection of the plates is made detachable, and the transverse dimensions of the hole in the second plate are not in the range of 0.01-0.1 from the transverse dimensions of the hole in the first plate. - ( Compiler M.Andreeva Editor I.Derbak Tehred I.Popovich Proofreader L.Pilipenko. Order 2122/40 Circulation 778 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5  Production and printing company, Uzhgorod, Projecto st., 4