SU1312469A1 - Specimen for adjusting ultrasonic flaw detector - Google Patents

Description

The invention relates to a non-destructive testing and can be used to set up an ultrasonic flaw detector with an inclined transducer to check the insertion angle.

The aim of the invention is to extend the functionality of the sample when setting up an ultrasonic flaw detector with an inclined transducer by providing verification of the insertion angle of the latter.

I

The drawing shows a diagram illustrating the use of a sample for tuning an ultrasonic flaw detector.

The diagram shows a sample for tuning an ultrasonic flaw detector, made in the form of two acoustically connected (for example, at the same time) coaxial cylinders 1 and 2, and in contact acoustically with a large diameter cylinder 1 ultrasonic inclined transducer containing a prism 3 and a piezoelectric element placed on it 4. Moreover, the sample and the converter prism are made of the same material, the end of the cylinder 1 larger in diameter is inclined to the software axis of the sample at an angle equal to the angle of inclination of the prism, diameter d of cylinder 2 and length 1 image and axis 00 is selected from ratios of

, 1- - h. 30.

Editor O. Filippova Order 5165

Compiled by M, Andreeva

Tehred L, 0liynyk Proofreader E. Lonchakova

Circulation 847 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

ten

124692

The sample for tuning the ultrasonic flaw detector is used as follows.

g Install the sample with an inclined end on the working surface of the prism 3 of the transducer and move it along it. In this case, ultrasonic vibrations are emitted by the piezoelectric element 4 and receive reflected signals. The movement is carried out before the appearance on the flaw detector screen (not shown) of the echo signal from the end of cylinder 2, which indicates the alignment of the acoustic axis of the transducer and the axis 00 of the sample and that that the spatial deviation of the input angle of the ultrasonic vibrations of the transducer is within the permissible value of ± 30 °. The impossibility of recording this signal indicates the unsuitability of the prism.

The parasitic signals reflected from the side surfaces of the cylinders do not interfere with the detection of useful reflected signals, since they have a longer reception time and a smaller amplitude due to multiple reflections. In addition, the completion of cylinders 1 and 2 at the same time allows us to eliminate spurious signals arising in the presence of an interface.

Thus, the specimen for tuning the ultrasonic flaw detector has wider functionality, allowing the input angle of an inclined transducer to be checked,

20

25

thirty

35

Claims (2)

SAMPLE FOR ADJUSTING THE ULTRASONIC DEFECTOSCOPE, made in the form of two acoustically connected with axial cylinders of different diameters, characterized in that, in order to expand its functionality when setting up an ultrasonic flaw detector with an inclined transducer due to checking the input angle of the latter, the free end face is larger in diameter the cylinder is made inclined to the axis of the sample at an angle equal to the angle of entry, and the diameter d of the smaller cylinder and the axial length of 1 sample are selected from the relation d I 2G ^{= 30} 727222 // 22 // 77/77 // 27/77777 SU 1312469 A1