SU888031A1 - Device to flaw detector for ultrasonic flaw detection of welded seams - Google Patents

Description

(54) DEVICE FOR DEFECTOR FOR ULTRASONIC CONTROL OF WELDS

one

The device relates to the field of non-destructive testing methods, namely to the means of ultrasonic quality control of welds.

A device for a flaw detector for ultrasonic testing of welds is known. to provide lateral movement of the finder 1.

The disadvantage of this device is low control performance, since the device does not provide automatic calculation of the area of defects in the controlled object.

The purpose of this invention is to increase the productivity of a control by automatically calculating the area of defects.

This goal is achieved by the fact that the device is equipped with a comb electrode

mounted on a guide bar, an electrode mounted on a finder and interacting with a comb-shaped electrode, an electronic key with one output and three inputs, two of

J which are connected to the electrodes, and one is intended to be connected to the flaw detector, and a pulse counter connected to the output of the electronic key.

FIG. Figure 1 shows the mechanical part of the device; in fig. 2 - electric

10 part of the device.

The device comprises a housing 1 with a window 2 and a finder 3. The housing 1 is fixed on a controlled object with the help of, for example, magnets 4. On the housing 1 rotatably mounted along the window 2 a screw 5

Claims (1)

ts with a flywheel 6. The screw 5 interacts with the nut 7 mounted on the housing 1 with the possibility of reciprocating movement along the axis of the screw 5. The guide bar 8 is rigidly attached to the nut 7 so that it overlaps 20 the opening of the window 2 of the housing 1 A finder 3 is mounted on the ruler 8 with the possibility of reciprocating movement. A detector 9 is fixed on the searcher 3, for example, a photodiode and a holder 10 with a pen 11 of a recorder (not shown). The device also contains a defect recorder, made in the form of a receiving 12 and a feeding 13 tapes with electrothermal paper 14 in contact with the pen of the recorder 11, a comb-shaped electrode 15 fixed on the guide bar 8, and an electrode 16 fixed on the searcher 3 and interacting with the electrode comb-shaped 15. The device also includes an electronic key 17 with one output and three inputs, two of which are connected to electrodes 15 and 16, a pulse counter 18 connected to the output of the electronic key 17 and the flaw detector 19 Yunenny to the third input of the electronic key 17. For operation. The device is placed on a controlled object so that the weld seam is located along the window 2, approximately along its axis, after which the body 1 is fixed on the object by magnets 4. Rotate the screw 5 you must install the nut 7 in one , from the extreme positions, and then move the finder 3 along the ruler 8. In this case, if there is no defect in the action area of the spreader 3, the pen 11 of the recorder will burn a solid line on the paper 14, impulses generated during interaction will be fed to the input of the electronic key ii electrode 15 to the electrode 16. If the distance between the teeth of the electrode 15 is equal to, for example 1 mm, the pulse number will be equal to the movement across the joint searcher 3 in millimeters. If a defect is detected, the pen 11 of the recorder will leave a pass on paper 14, the defect detector 9 lights up on the searcher 3, and the electronic key 17 controlled by the flaw detector 19 will send the pulses generated during the passage of the searcher 3 over the defect to the pulse counter 18. Next, we repeat the scanning process, i.e. turn the screw 5, move the nut 7, for example 1 mm, and move the finder 3 along the ruler 8 again. After scanning the entire weld area limited by the window 2 of the housing 1, the location pattern is reflected on the electrothermal paper 14 defects in the weld, and the reading of the counter 18 will be numerically equal to the total area of defects of this weld area in square millimeters. Thus, eliminating the operation of calculating the area of defects allows an increase in labor productivity by 20–30%. The invention The device for a flaw detector for ultrasonic testing of welded joints, comprising a housing mounted on it with the possibility of longitudinal-transverse movement along the object under test a ruler to provide lateral movement of the searcher, characterized in that, in order to increase the control performance by automatically calculating the area Adi defects, the device is equipped with a comb-shaped electrode mounted on a guide bar, an electro-diode mounted on a finder and interacting with a comb-shaped electrode, an electronic key with one output and three inputs, two of which are connected to the electrodes, and one is intended to be connected to a flaw detector , and a pulse counter connected to the output of the electronic key. Sources of information taken into account during the examination 1. A. K. Gurvich and I. N. Ermolov. Ultrasonic inspection of welds, Kiev, “Technique, 1972, p. 431, fig. 235.