CN206974930U - A kind of TOFD probe apparatus for weld seam detection - Google Patents

Abstract

The utility model discloses a kind of TOFD probe apparatus for weld seam detection,Voussoir pair is detected including at least one set,Detection voussoir is to the first voussoir including being arranged on the domatic mother metal of weld seam side skiving and the second voussoir being arranged on the plane mother metal of weld seam opposite side,It is the first contact surface between first voussoir and domatic mother metal,It is the second contact surface between second voussoir and plane mother metal,Transmitting probe is fixedly installed on first voussoir,Receiving transducer is fixedly installed on second voussoir,Angle angle between the Main beam of receiving transducer and the second contact surface normal is standard value,Angle angle between the Main beam of transmitting probe and the first contact surface normal is no more than standard value and the gradient sum of domatic mother metal,The wafer size of transmitting probe is not less than the wafer size of receiving transducer,The mounting distance of first voussoir is not less than the mounting distance of the second voussoir,Advantage is：It is simple in construction, the detection of mother metal not butt welds can be used for effectively and in high sensitivity.

Description

A kind of TOFD probe apparatus for weld seam detection

Technical field

A kind of detection means of weld defect is the utility model is related to, more particularly to a kind of TOFD for weld seam detection is visited Head device.

Background technology

At present in TOFD (Time Of Flight Diffraction, the ultrasonic wave diffraction time difference method) inspections to weld defect In survey, the characterization processes of generally use are combined into a pair using two same frequencys, same to wedge angle, the probe with wafer size Probe pair, and the symmetric position of axis of a weld both sides to be detected is arranged on, it can so reach and whole section of weld joint is entered The purpose of row TOFD detections.

But the probe of said structure is to being suitable only for the detection of plane butt weld, it is desirable to both sides mother metal uniform thickness, surface Concordantly, receiving transducer receives the diffracted signal launched by defect end points easily when the TOFD is detected, so as to complete pair The detection of weld seam.And in physical device manufacture, it is inconsistent to be frequently encountered such as mother metal thickness, for reduce stress need it is unilateral Situations such as skiving, and cause the butt weld that certain slope be present, the arrangement of TOFD probes is influenceed, now using prior art just Have that detection sensitivity is relatively low or too big etc. adverse effect of noise signal, influence testing result.

Utility model content

In order to solve above-mentioned the deficiencies in the prior art, the utility model provides a kind of TOFD for weld seam detection Probe apparatus, it is simple in construction, the detection of mother metal not butt welds can be used for effectively and in high sensitivity.

Technical scheme is used by the utility model solves above-mentioned technical problem：A kind of TOFD for weld seam detection is visited Head device, including at least one set of detection voussoir pair, described detection voussoir is to including being arranged on the domatic mother metal of weld seam side The first voussoir and the second voussoir for being arranged on the plane mother metal of described weld seam opposite side, the first described voussoir with it is described Domatic mother metal between be the first contact surface, be the second contact surface between the second described voussoir and described plane mother metal, institute Transmitting probe is fixedly installed on the first voussoir stated, receiving transducer is fixedly installed on the second described voussoir, described connects The angle angle received between the Main beam of probe and the second described contact surface normal is standard value, the master of described transmitting probe Angle angle between acoustic beam and the first described contact surface normal no more than standard value and described domatic mother metal the gradient it It is not less than the wafer size of described receiving transducer, described transmitting probe and institute with the wafer size of, described transmitting probe The frequency for the receiving transducer stated is consistent, and the mounting distance of the first described voussoir and described axis of a weld is not less than described The mounting distance of second voussoir and described axis of a weld.

In some embodiments, the first mounting surface, described transmitting probe and institute are provided with the first described voussoir The first mounting surface stated is of coupled connections, and is provided with the second mounting surface in the second described voussoir, described receiving transducer with it is described The second mounting surface be of coupled connections.

In some embodiments, the material selection lucite of the first described voussoir and the second described voussoir.

In some embodiments, the folder between the Main beam of described receiving transducer and the second described contact surface normal Angle angle is α, and the angle angle between the Main beam of described transmitting probe and the first described contact surface normal is β, described The gradient of domatic mother metal be θ, then (α+θ/2)≤β≤(α+θ).Thus, there are more preferable Detection results.

Compared with prior art, the utility model has the advantage of：Pass through the wedge angle to TOFD probes pair, chip chi Very little and mounting distance optimal design-aside, strengthens the incoming signal of transmitting probe, and makes incident Main beam and and axis of a weld Angle close to planar side routine wave beam and axis of a weld angle.The ability for receiving diffracted signal is improved, is reduced Acoustic beam angle caused by gradient mother metal for detect effective district influence, so as to ensure whole section of weld joint obtain high sensitivity and Accurate detection.The utility model is simple in construction, convenient material drawing.

Brief description of the drawings

Fig. 1 is a kind of structural representation of TOFD probe apparatus for weld seam detection of the embodiment of the utility model one.

Wherein, the first voussoir 1, the second voussoir 2, weld seam 3, domatic mother metal 4, plane mother metal 5, the first mounting surface 6, transmitting are visited First 7, the second mounting surface 8, receiving transducer 9, axis of a weld 10, heat affected area 11, weld-fusion line 12.

Embodiment

The utility model one kind is described in further detail below in conjunction with accompanying drawing, but not as to limit of the present utility model It is fixed.

As shown in figure 1, a kind of TOFD probe apparatus for weld seam detection, including at least one set of detection voussoir pair, detection Voussoir including the first voussoir 1 and the second voussoir 2, the first voussoir 1 to being arranged on the domatic mother metal 4 of the side of weld seam 3, the second voussoir 2 are arranged on the plane mother metal 5 of the opposite side of weld seam 3.It is the first contact surface between first voussoir 1 and domatic mother metal 4, the second voussoir It is the second contact surface between 2 and plane mother metal 5.The first mounting surface 6 is provided with first voussoir 1, fixes and sets on the first mounting surface 6 Transmitting probe 7 is equipped with, i.e., domatic side is popped one's head in as transmitting probe 7.The second mounting surface 8, the second peace are provided with second voussoir 2 Receiving transducer 9 is fixedly installed on dress face 8, i.e., planar side is popped one's head in as receiving transducer 9, probe and the company of coupling between mounting surface Connect.The center line 10 of weld seam 3 is that defect predominantly detects place, and the mounting distance of the first voussoir 1 and axis of a weld 10 is not less than the The mounting distance of two voussoirs 2 and axis of a weld 10, and weld seam 3 has one fixed width, therefore transmitting probe 7 and receiving transducer 9 Minimum mounting distance between center line 6 is not less than the width of weld seam 3.Heat affected area 11 and weld seam fusion are also show in Fig. 1 Line 12.

Angle between the Main beam of receiving transducer 9 and the second contact surface normal is α, and α is also equal to the voussoir of the second voussoir 2 Angle, that is, Main beam is chosen in the angle of diffraction of fault location, α according to NB/T47013.10 standard recommendations value.Transmitting probe 7 Angle between Main beam and the first contact surface normal is β, and β is also equal to the wedge angle of the first voussoir 1, that is, Main beam is in work Incident angle in part, β ＞ α, β are α and domatic mother metal 4 gradient sum.Make θ be domatic mother metal 4 the gradient, then β=α+θ or β≈α+θ.Drawn after being tested according to reference block, preferable β spans are (α+θ/2)≤β≤(α+θ), are thus had more preferable Detection results.

The transmitting of the wafer size wafer size, i.e. transmitting probe 7 (not shown) more than receiving transducer 9 of transmitting probe 7 Power is more than the transmission power of receiving transducer 9.Transmitting probe 7 is consistent with the frequency of receiving transducer 9.Said structure makes transmitting probe 7 Main beam is at or about the Main beam and axis of a weld 10 of receiving transducer 9 with the angle β ' of axis of a weld 10 Angle α ', it is better closer to Detection results.By to the wedge angle of TOFD probes pair, wafer size and mounting distance Optimal design-aside, strengthen transmitting probe 7 incoming signal, and make incident wave beam, planar side routine wave beam and axis of a weld 10 it Between angle approach, enable receiving transducer 9 effective and it is highly sensitive reception as caused by defect end points diffracted signal, reduce Acoustic beam angle caused by domatic mother metal 4 is for detecting the influence of effective district, so as to ensureing that whole section of weld joint obtains Gao Ling Sensitivity and accurate detection.

Other concrete structures of TOFD probe apparatus use prior art.The material of first voussoir 1 and the second voussoir 2 is selected Use lucite.If planar side mother metal thickness is T, if T value between 12~50mm of scope, sets one group of detection voussoir It is right；If T value between 50~100mm of scope, sets two groups of detection voussoirs pair；If T value 100~200mm of scope it Between, then three groups of detection voussoirs pair are set.Every group of detection voussoir is first according to standard recommendation value and chooses reception to all being set by following The wedge angle α of probe 9, the setting distance between receiving transducer 9 and axis of a weld 10 areTransmitting probe 7 Wedge angle β, β span should be (α+θ/2)≤β≤(α+θ), transmitting Main beam and reception Main beam is all focused on workpiece Thickness T 2/3rds depths.Mounting distance of the transmitting probe 7 along domatic mother metal 4 can be visited according to transmitting probe 7 and reception The gradient of first 9 wedge angle, the setting distance of receiving transducer 9 and domatic mother metal 4 obtains, and can also pass through the detection knot of test block Structure optimizes to obtain.When multigroup detection voussoir pair is set, ensure that acoustic beam covers 25% at least up in depth (mother metal thickness) direction Requirement.

It is worth noting that, the foregoing is only preferred embodiment of the present utility model, it is new not thereby to limit this practicality The scope of patent protection of type, the utility model can also carry out the improvement of material and structure to the construction of above-mentioned various parts, Either it is replaced using technically equivalent ones.Therefore all equivalent knots made with specification of the present utility model and diagramatic content Structure changes, or directly or indirectly applies to other correlative technology fields and be similarly all contained in the scope that the utility model is covered It is interior.

Claims (4)

1. a kind of TOFD probe apparatus for weld seam detection, including at least one set of detection voussoir pair, it is characterised in that described Detection voussoir is to the first voussoir including being arranged on the domatic mother metal of weld seam side and is arranged on described weld seam opposite side The second voussoir on plane mother metal, it is the first contact surface between the first described voussoir and described domatic mother metal, described It is the second contact surface between two voussoirs and described plane mother metal, is fixedly installed transmitting probe on the first described voussoir, institute Receiving transducer, the Main beam of described receiving transducer and the second described contact surface normal are fixedly installed on the second voussoir stated Between angle angle be standard value, the angle between the Main beam of described transmitting probe and the first described contact surface normal Angle is no more than standard value and the gradient sum of described domatic mother metal, and the wafer size of described transmitting probe is not less than described Receiving transducer wafer size, described transmitting probe is consistent with the frequency of described receiving transducer, the first described voussoir Mounting distance with described axis of a weld is not less than the second described voussoir and the mounting distance of described axis of a weld.

A kind of 2. TOFD probe apparatus for weld seam detection according to claim 1, it is characterised in that described first The first mounting surface is provided with voussoir, described transmitting probe is of coupled connections with the first described mounting surface, the second described wedge The second mounting surface is provided with block, described receiving transducer is of coupled connections with the second described mounting surface.

A kind of 3. TOFD probe apparatus for weld seam detection according to claim 1 or 2, it is characterised in that described The material selection lucite of one voussoir and the second described voussoir.

4. a kind of TOFD probe apparatus for weld seam detection according to claim 1 or 2, it is characterised in that described connects The angle angle received between the Main beam of probe and the second described contact surface normal is α, the Main beam of described transmitting probe Angle angle between the first described contact surface normal is β, and the gradient of described domatic mother metal is θ, then（α+θ/2）≤β ≤（α+θ）.