CN104777238A - Test block for low-voltage apparatus electric contact ultrasonic non-destructive test and calibration method thereof - Google Patents
Test block for low-voltage apparatus electric contact ultrasonic non-destructive test and calibration method thereof Download PDFInfo
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- CN104777238A CN104777238A CN201510170298.5A CN201510170298A CN104777238A CN 104777238 A CN104777238 A CN 104777238A CN 201510170298 A CN201510170298 A CN 201510170298A CN 104777238 A CN104777238 A CN 104777238A
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Abstract
The invention provides a test block for low-voltage apparatus electric contact ultrasonic non-destructive test and a calibration method thereof. The test block comprises a thickness block and a supporter which bears the thickness block; the supporter comprises a counter hole and s solid part; the counter hole is divided to be a first groove and a second groove; the thickness block is embedded into the first groove of the counter hole; the lower surface of the solid is provided with two threaded through holes which are used for fixing the test block. The method comprises the following steps of integrally connecting and fixing the test block on a measuring water tank; acquiring reflection echo of the lower surface of the thickness block by an ultrasonic non-destructive testing apparatus; adjusting a gain panel of a pulse generator in order to enable the height of the reflection echo of the lower surface to reach 80% of full amplitude; determining the gain of the pulse generator and using as the standard of ultrasonic probe for subsequent workpiece detection. By utilizing the test block, the problem that the detection strength is weak when detecting a joint surface of contact and bridge is solved.
Description
Technical field
The invention belongs to UT (Ultrasonic Testing) equipment technology field, more particularly, relate to a kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive test block and scaling method.
Background technology
Ultrasound examination is one of lossless detection method be most widely used at present.Indispensable element when standard testing block is Ultrasonic NDT, it is mainly used in probe, the performance test of detector, the adjustment of sensitivity, and the work of the aspect such as the adjustment of measurement range.
But, there is certain drawback in use in existing calibrated bolck.Such as, carrying out the timing signal of popping one's head in utilizing test block, particularly at the detection field of low-voltage electrical apparatus electric contact, using conventional standard testing block and scaling method, bring some inconvenience to follow-up test.Traditional standard testing block, carrying out probe timing signal, adopting A type display pulse reflection method to detect, usually with the elevation carrection of standard testing block upper surface echo for according to the gain of setting up pulse producer, after gain setting, with this standard, workpiece is detected.But, at Low Voltage Electrical Apparatus, when utilizing Ultrasonic Nondestructive, usual detection be the faying face of the contact probe bridge of electric contact, non-upper surface, so, if still demarcate according to original standard and method, then the test signal intensity obtained can obviously weaken, and affects the judgement of test result.
Summary of the invention
For above-mentioned defect of the prior art, the object of the invention is to design a kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive test block and scaling method, described test block and scaling method can solve the deficiency of traditional standard test block, can Fast Calibration probe all kinds of indexs, simultaneously can not affect actual testing result because of the difference of demarcation face and actual detection faces, ensure that the accuracy of test result.
For realizing above-mentioned object, the technical solution used in the present invention is,
The invention provides a kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive test block, comprise the supporter of thickness block and the described thickness block of carrying, described supporter comprises counterbore and entity two parts, wherein: described counterbore comprises the first groove and the second groove, first, second groove described is set in turn in the upper surface of described entity by order from top to bottom; Described thickness block is embedded in the first groove of described counterbore, and described second groove makes to retain a gap between thickness block and entity; The lower surface both ends of described entity are respectively arranged with tapped through hole, and the position that described tapped through hole is used for described test block entirety is fixed.
Preferably, the shape of described thickness block is rectangular parallelepiped or right cylinder, but is not limited to rectangular parallelepiped or right cylinder, needs to ensure that described thickness block has constant uniform thickness.
Preferably, the mating shapes of described first groove and described thickness block.
Preferably, the length of described thickness block or the length of diameter and described first groove or diameter match.
Preferably, the length of described second groove or diameter are than the length of thickness block or the little 4 ~ 8mm of diameter, and shape is identical with the shape of the first groove.
The present invention also provides a kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive scaling method, and described method comprises the steps:
Step one: thickness block is embedded in the first groove of supporter counterbore;
Step 2: test block integrated connection is fixed on and measures in tank;
Step 3: utilize Ultrasonic Nondestructive equipment, obtains the reflection echo of thickness block lower surface;
Step 4: the gain panel of regulating impulse generator, the thickness block lower surface reflection echo signal height that step 3 is obtained reaches 80% of full width, and full width is 1V;
Step 5: the gain determining pulse producer, and the standard of carrying out subsequent workpiece detection as ultrasonic probe.
Preferably, in step 2, described test block is bolted to be fixed on and measures in tank.
Preferably, in step 3, adopt A type display pulse reflection method, obtain the reflection echo of described thickness block lower surface.
Owing to have employed technique scheme, the invention has the beneficial effects as follows:
A kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive test block of the present invention and scaling method, ultrasound scanning can be coordinated, complete ultrasonic probe to the demarcation detecting thickness, particularly in the Ultrasonic Nondestructive field of low-voltage electrical apparatus, solve the problem that when detection contact touches bridge faying face, detected intensity is on the weak side, have highly application value.
Accompanying drawing explanation
Fig. 1 is the test block assembly center section plan of one embodiment of the invention;
Fig. 2 is thickness block vertical view and the front view of one embodiment of the invention, and wherein (a) is vertical view, and (b) is front view;
Fig. 3 is thickness block vertical view and the front view of another embodiment of the present invention, and wherein (a) is vertical view, and (b) is front view;
Fig. 4 is the thickness block supporter sectional view of one embodiment of the invention;
In figure: 1 is supporter, 2 is the first retaining thread hole, and 3 is the second groove, and 4 is thickness block, and 5 is the second retaining thread hole, and 6 is the first groove.
Embodiment
Be further described technical scheme of the present invention below, the following description is only the use understanding technical solution of the present invention, and be not used in and limit scope of the present invention, protection scope of the present invention is as the criterion with claims.
As Figure 1-4, the present embodiment provides a kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive test block, and described test block comprises thickness block 4, carries the supporter 1 of this thickness block 4, wherein:
Described supporter 1 comprises counterbore and entity two parts, and described counterbore comprises the first groove 6 and the second groove 3, and first, second groove 6,3 described is set in turn in the upper surface of described entity by order from top to bottom; Described thickness block 4 is embedded in described first groove 6, and described second groove 3 is for support thickness block 4; Described second groove 3, makes the gap leaving more than 5mm between thickness block 4 and supporter 1; The lower surface both ends of described entity are respectively arranged with the first retaining thread hole 2 and the second retaining thread hole 5, and the effect in described first retaining thread hole 2 and the second retaining thread hole 5 is fixed the position of test block entirety.
As a preferred implementation, as described in as shown in (a), (b) in Fig. 2, the shape of thickness block 4 is rectangular parallelepiped, or the shape of thickness block 4 is right cylinder as described in as shown in (a), (b) in Fig. 3, but be not limited to rectangular parallelepiped or right cylinder, need to ensure that thickness block 4 has constant uniform thickness.
Shape, the size of described first groove 6 and described thickness block 4 match.
The length of described second groove 3 or diameter are than the length of thickness block 4 or the little 4 ~ 8mm of diameter, and shape is identical with the shape of the first groove 6.
As a preferred implementation, the length of the length of described thickness block 4 or diameter and described first groove 6 or equal diameters, make thickness block 4 just be arranged in described first groove 6.
In another embodiment, provide a kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive scaling method, described method adopts above-mentioned test block, comprises the steps:
Step one: the thickness block 4 of test block is embedded in the first groove 6 of supporter 1, thus it is overall to form test block;
Step 2: test block entirety is bolted be fixed on and measures in tank;
Step 3: utilize Ultrasonic Nondestructive equipment, adopts A type display pulse reflection method, obtains the reflection echo of thickness block 4 lower surface;
Step 4: the gain panel of regulating impulse generator, the reflection echo signal height of thickness block 4 lower surface that step 3 is obtained reaches 80% of full width, and full width is 1V;
Step 5: the gain determining pulse producer, and the standard of carrying out subsequent workpiece detection as ultrasonic probe.
Utilizing the gain of probe now and pulse producer to arrange, can ensureing that probe obtains good signal and image when detecting workpiece.
A kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive test block of the present invention and scaling method, ultrasound scanning can be coordinated, complete ultrasonic probe to the demarcation detecting thickness, particularly in the Ultrasonic Nondestructive field of low-voltage electrical apparatus, solve the problem that when detection contact touches bridge faying face, detected intensity is on the weak side, have highly application value.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (7)
1. a low-voltage electrical apparatus electric contact Ultrasonic Nondestructive test block, it is characterized in that, comprise the supporter of thickness block and the described thickness block of carrying, described supporter comprises counterbore and entity two parts, wherein: described counterbore comprises the first groove and the second groove, first, second groove described is set in turn in the upper surface of described entity by order from top to bottom; Described thickness block is embedded in the first groove of described counterbore, and described second groove is provided between thickness block and entity and retains a gap; The lower surface both ends of described entity are respectively arranged with tapped through hole, and the position that described tapped through hole is used for described test block entirety is fixed.
2. a kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive test block as claimed in claim 1, it is characterized in that, the shape of described thickness block is rectangular parallelepiped or right cylinder, and described thickness block has constant uniform thickness.
3. a kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive test block as claimed in claim 1, it is characterized in that, the mating shapes of described first groove and described thickness block, length or the diameter of the length of described thickness block or diameter and described first groove match.
4. a kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive test block as described in any one of claim 1-3, it is characterized in that, the mating shapes of described second groove and the first groove, the length of the second groove or diameter are than the length of described thickness block or the large 4 ~ 8mm of diameter.
5. the low-voltage electrical apparatus electric contact Ultrasonic Nondestructive scaling method adopting test block described in any one of claim 1-4 to carry out, it is characterized in that, described method comprises the steps:
Step one: thickness block is embedded in the first groove of supporter counterbore;
Step 2: test block integrated connection is fixed on and measures in tank;
Step 3: utilize Ultrasonic Nondestructive equipment, obtains the reflection echo of thickness block lower surface;
Step 4: the gain panel of regulating impulse generator, the thickness block lower surface reflection echo signal height that step 3 is obtained reaches 80% of full width, and full width is 1V;
Step 5: the gain determining pulse producer, and the standard of carrying out subsequent workpiece detection as ultrasonic probe.
6. a kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive scaling method as claimed in claim 5, is characterized in that, in step 2, described test block is bolted to be fixed on and measures in tank.
7. a kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive scaling method as claimed in claim 5, is characterized in that, in step 3, adopts A type display pulse reflection method, obtains the reflection echo of described thickness block lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510170298.5A CN104777238B (en) | 2015-04-10 | 2015-04-10 | A kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive test block and scaling method |
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| CN201510170298.5A CN104777238B (en) | 2015-04-10 | 2015-04-10 | A kind of low-voltage electrical apparatus electric contact Ultrasonic Nondestructive test block and scaling method |
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| CN104777238A true CN104777238A (en) | 2015-07-15 |
| CN104777238B CN104777238B (en) | 2017-08-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525984A (en) * | 2016-08-30 | 2017-03-22 | 江苏共昌轧辊股份有限公司 | Test block for ultrasonic testing |
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| EP0068521B1 (en) * | 1981-06-11 | 1986-08-13 | BBC Aktiengesellschaft Brown, Boveri & Cie. | Ultrasonic non destructive testing of generator rotor teeth |
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| CN106525984A (en) * | 2016-08-30 | 2017-03-22 | 江苏共昌轧辊股份有限公司 | Test block for ultrasonic testing |
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| CN104777238B (en) | 2017-08-15 |
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Address after: 200240 Shanghai city Minhang District Jianchuan road 953 Lane 322 building Applicant after: SHANGHAI HEWU PRECISION APPARATUS CO., LTD. Address before: No. 955 Cangyuan science and Technology Park, 200240 Shanghai city Minhang District Jianchuan Road Building 9 floor, I enjoy my home Applicant before: Shanghai Hiwave Advanced Materials Technology Co., Ltd. |
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