CN2246800Y - Ultrasonic automatic flaw detector probe for thin-layer double-medium adhesive face - Google Patents

Abstract

The utility model relates to an ultrasonic automatic flaw detection probe for thin layer double-medium adhesive faces, which is characterized in that a wafer is arranged between a damping block and a delay block, a probe is arranged on a probe base, and the thickness D of the delay block is larger than 5 mm and is smaller than 50 mm. The delay block is arranged at the lowest part of a copper shell, a spring is arranged between the copper shell and the probe base, and the copper shell is matched with the probe base via a limited key. The utility model solves the problem of hard automatic flaw detection of the thin layer in a long term and has simple structure, easy fabrication and easy automation realization, and the utility model can be widely used in the flaw detection device of various thin layer double-medium objects.

Description

The two medium bonding plane automatic ultrasonic inspection instrument probes of thin layer

The utility model belongs to the UT (Ultrasonic Testing) technical field, relates to a kind of dedicated probe that is used for the two medium bonding plane flaw detections of thin layer.

In the domestic and international prior art before the utility model, the technology that belongs to the UT (Ultrasonic Testing) aspect is many.The object that most defectoscope and probe are detected a flaw generally all is the single and uniform metal, or single uniform dielectric is nonmetal, and product all has certain thickness, or square body or garden body, or the given shape that product had.But for the flaw detection problem of the two medium bonding plane measured objects of thin layer, rarely found have a special report.This is because the solution of the flaw detection quality problems of the two medium bonding planes of thin layer has suitable difficulty.If according to existing defect detection on ultrasonic basis, directly measure laminate structure, owing to can not reject false signal, be difficult to obtain correct result.The ultrasonic signal resolution degree of laminate structure is very low, the acoustic impedance of ultrasound wave among metal and nonmetallic materials differs greatly in addition, make probe and measured object surface close the error effect degree increasing that quality causes, thereby bring certain difficulty for the flaw detection problem of this type objects because of lotus root.

At above-mentioned problems of the prior art, the purpose of this utility model is, provides a kind of and can judge in time that lotus root closes quality, eliminates the two medium bonding plane automatic ultrasonic inspection instrument probes of thin layer of the false signal of boundary reflection.

Now the utility model technical solution is described below:

Fig. 1 is the cut-open view that the utility model probe is installed in probe socket.

The utility model is by cable socket (12), matched coil (11), copper shell (6), damping block (8), wafer (5), delay block (4) consists of. Wafer (5) is installed in damping block (8) and delay block (4) Between, adopting Lead Zirconate Titanate ceramic material, diameter is 10～20mm, it is organic postponing (4) Glass is installed in the foot of copper shell (6), directly and the testee Surface Contact; For Make probe keep vertical and have constant pressure, the installation of will popping one's head in the surface of testee 3. go up at probe socket, and between copper shell (6) and probe socket (3), spring (9) is housed; For protecting Hold between probe and the probe socket (3) and do not produce any circumferential movement, the boss in copper shell (6) On have 1 axial limiting groove, cooperate with probe socket (3) by positive stop key (7). Delay block (4) thickness D is relevant with the thickness of tested metal shell, and the value of D is 50mm 〉=D 〉=5mm, In this scope, D also should satisfy following relational expression simultaneously: $D\≠n\frac{C_1}{C_2}d$ In the formula: C₁---the velocity of sound of delay block

  C ₂---the velocity of sound of tested housing

The thickness of d---tested housing

N---integer quotient

The utility model when work, the probe delay piece is close on the testee surface, make interface of formation between the medium I that delay block end face and its be close to, also form an interface at medium I with between opposite side and the medium II that is close to.Transmission and reflex are all taking place on the interface between delay block and medium I and on the interface between medium I, the II in the ultrasound wave that is sent by wafer, by measuring transmission energy and the reflected energy between delay block and medium I, can draw the acoustic reflectivity at interface between medium I, II, thereby determine the defect state of measured object, reject false signal, improve the flaw detection contrast sensitivity.

The utility model is compared with prior art, only structurally taked a simple measure, just making for a long time, the two medium bonding plane flaw detection of thin layer quality problems have obtained good solution, can guarantee that not only probe beam axis in motion process keeps vertical with test surface all the time, the flaw detection blind area is moved in the delay block, and the reflecting surface that can utilize delay block regulates the flaw detection sensitivity of instrument automatically, and judges that in time lotus root closes quality, rejects false signal.

The utility model is simple in structure, and cost is lower, and is easy to manufacture, can realize the robotization of detecting a flaw, for the two medium bonding plane automatic ultrasonic inspection instrument equipment of the bigger thin layer of difficulty provide fabulous probe.

Claims (1)

1. two medium bonding plane automatic ultrasonic inspection instrument probes of a thin layer, have cable socket, matched coil, damping block, wafer, it is characterized in that: wafer is installed between damping block and the delay block; Delay block is installed in the bottom of copper shell, and probe is installed on the probe socket, and between copper shell and the probe socket spring is housed; The thickness span of delay block is 50mm 〉=D 〉=5mm, in this scope, also should satisfy relational expression: $D\≠n\frac{C_1}{C_2}d$

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