CN105300565A - Method for measuring lifting force of magnetic crack detector - Google Patents
Method for measuring lifting force of magnetic crack detector Download PDFInfo
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- CN105300565A CN105300565A CN201410262343.5A CN201410262343A CN105300565A CN 105300565 A CN105300565 A CN 105300565A CN 201410262343 A CN201410262343 A CN 201410262343A CN 105300565 A CN105300565 A CN 105300565A
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- crack detector
- dynamometer
- magnetic crack
- lifting force
- magnetic
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Abstract
The present invention relates to the technical field of magnetic crack detection, and specifically a method for measuring the lifting force of a magnetic crack detector. According to the invention, a cumbersome lifting force testing block is needless, and the on-site testing is convenient and fast. According to the invention, the additional error due to magnetic conductivity difference of various work pieces to be detected during the lifting force measuring process is eliminated.
Description
Technical field
The present invention relates to magnetic-field test technical field, be specially a kind of measuring method measuring magnetic crack detector lifting force.
Background technology
After the lifting force of magnetic crack detector must be greater than a certain value, effective magnetic induction density of guarantee examined workpiece, namely ensures detection sensitivity.JB/T4730.4-2005 " bearing device Non-Destructive Testing Magnetic testing " specifies: when using yoke maximum spacing, indirect current harness at least should have the lifting force of 45N; Direct circuit harness at least should have the lifting force of 177N; Crossed yoke at least should have the lifting force of 118N.Whether what adopt when pre-test lifting force is the iron and steel test block of constant weight, can by magnetic force mention test block verify after being energized by yoke.But verify that the yoke of different electric current need use different test blocks, and test block is heavier, the test block quality as weight 177N is about 18.06KG, be only use in laboratory usually, as then not too convenient in taken onsite application at any time to.Lifting force when using test block can not verify that magnetic crack detector works on workpiece.
Summary of the invention
(1) technical matters that will solve
In order to measure the lifting force of magnetic crack detector quickly whenever and wherever possible, the invention provides a kind of magnetic crack detector lifting force proving installation, the lifting force of magnetic crack detector on practical work piece can be measured easily.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of measuring method measuring magnetic crack detector lifting force, described method is divided into following steps:
Magnetic crack detector is connected with connection cord;
Below dynamometer, mount described magnetic crack detector, magnetic crack detector is mentioned from center of gravity;
Hand-held dynamometer, is placed in above workpiece for measurement by described magnetic crack detector;
Dynamometer is upwards slowly at the uniform velocity lifted to measuring height, and described measuring height need be greater than dynamometer suspension hook stretching range downwards 5 ~ 10cm;
Record dynamometer reading a;
Connect magnetic crack detector power supply;
Record dynamometer stablize after reading b;
The difference of reading b and reading a is the lifting force of magnetic crack detector.
Preferably, described dynamometry counts mechanical type weight beam or electronic dynamometer, and be provided with suspension ring above described dynamometer, below is provided with suspension hook.
(3) beneficial effect
1, need not carry heavy lifting force test block, on-the-spot test is convenient and swift.
2, workpiece material to be detected is different, and corresponding magnetic permeability is not identical yet, and the otherness of above-mentioned workpiece magnetic permeability can produce certain influence to lifting force.When only adopting reference block test, the material due to reference block is fixing, and the difference detecting workpiece and reference block material aspect can increase measuring error to the data result measured.This error can be eliminated when adopting the method for the invention to measure.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is according to a kind of measuring process schematic diagram measuring a measuring method embodiment of magnetic crack detector lifting force of the present invention.
Embodiment
Below in conjunction with Figure of description and embodiment, the specific embodiment of the present invention is described in further detail.Following examples only for illustration of the present invention, but can not be used for limiting the scope of the invention.
The invention provides a kind of measuring method measuring magnetic crack detector lifting force, be divided into following steps:
Magnetic crack detector is connected with connection cord;
Below dynamometer, mount described magnetic crack detector, magnetic crack detector is mentioned from center of gravity;
Hand-held dynamometer, is placed in above workpiece for measurement by described magnetic crack detector;
Dynamometer is upwards slowly at the uniform velocity lifted to measuring height, and described measuring height need be greater than dynamometer suspension hook stretching range downwards 5 ~ 10cm;
Record dynamometer reading a;
Connect magnetic crack detector power supply;
Record dynamometer stablize after reading b;
The difference of reading b and reading a is the lifting force of magnetic crack detector.
The dynamometry used in the measuring method that the present invention adopts counts mechanical type weight beam or electronic dynamometer.All have suspension ring above described dynamometer, below is provided with suspension hook.
Figure 1 shows that operating diagram when the present invention adopts mechanical type weight beam 4 to measure.Magnetic crack detector 2 is positioned at above workpiece 1; Connecting line 3 forms firm connection with magnetic crack detector 2; Hang over below mechanical type weight beam 4 on connecting line 3; Hand-held by measurement people above mechanical type weight beam 4; Magnetic crack detector 2 uniform speed slow is promoted, stops after hanging workpiece 1 and exceeding described mechanical type weight beam 4 times stretching range 5 ~ 10cm; The testing force meter number of degrees are stablized the rear record number of degrees and are connected the power supply of magnetic crack detector 2; The testing force meter number of degrees record reading after stablizing further, complete measurement.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (2)
1. measure a measuring method for magnetic crack detector lifting force, described method is divided into following steps:
Magnetic crack detector is connected with connection cord;
Below dynamometer, mount described magnetic crack detector, magnetic crack detector is mentioned from center of gravity;
Hand-held dynamometer, is placed in above workpiece for measurement by described magnetic crack detector;
Dynamometer is upwards slowly at the uniform velocity lifted to measuring height, and described measuring height need be greater than dynamometer suspension hook stretching range downwards 5 ~ 10cm;
Record dynamometer reading a;
Connect magnetic crack detector power supply;
Record dynamometer stablize after reading b;
The difference of reading b and reading a is the lifting force of magnetic crack detector.
2. a kind of measuring method measuring magnetic crack detector lifting force according to claim 1, it is characterized in that, described dynamometry counts mechanical type weight beam or electronic dynamometer, and be provided with suspension ring above described dynamometer, below is provided with suspension hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410262343.5A CN105300565B (en) | 2014-06-12 | 2014-06-12 | A kind of measurement method of magnetic crack detector lifting force |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410262343.5A CN105300565B (en) | 2014-06-12 | 2014-06-12 | A kind of measurement method of magnetic crack detector lifting force |
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| Publication Number | Publication Date |
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| CN105300565A true CN105300565A (en) | 2016-02-03 |
| CN105300565B CN105300565B (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410262343.5A Active CN105300565B (en) | 2014-06-12 | 2014-06-12 | A kind of measurement method of magnetic crack detector lifting force |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551302A (en) * | 2020-06-12 | 2020-08-18 | 智慧计量检测(海南)有限公司 | Lifting force testing method for magnet yoke type flaw detector |
| CN116297818A (en) * | 2023-05-17 | 2023-06-23 | 中国核工业二四建设有限公司 | Nondestructive testing method for steel lining wallboard |
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| JP2005024295A (en) * | 2003-06-30 | 2005-01-27 | Jfe Steel Kk | Leakage flux flaw detection test |
| CN201215515Y (en) * | 2008-06-19 | 2009-04-01 | 腾普(常州)精机有限公司 | Pile riveted pulling force measuring apparatus |
| US20120109565A1 (en) * | 2009-07-01 | 2012-05-03 | National University Corporation Okayama University | Leakage magnetic flux flaw inspection method and device |
| CN202562886U (en) * | 2012-03-23 | 2012-11-28 | 新疆维吾尔自治区计量测试研究院 | Detector for magnet yoke type magnetic powder flaw detector |
| CN203259498U (en) * | 2013-03-29 | 2013-10-30 | 国家电网公司 | DC (direct current) magnetic defect detector sensitivity detection device |
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2014
- 2014-06-12 CN CN201410262343.5A patent/CN105300565B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005024295A (en) * | 2003-06-30 | 2005-01-27 | Jfe Steel Kk | Leakage flux flaw detection test |
| CN201215515Y (en) * | 2008-06-19 | 2009-04-01 | 腾普(常州)精机有限公司 | Pile riveted pulling force measuring apparatus |
| US20120109565A1 (en) * | 2009-07-01 | 2012-05-03 | National University Corporation Okayama University | Leakage magnetic flux flaw inspection method and device |
| CN202562886U (en) * | 2012-03-23 | 2012-11-28 | 新疆维吾尔自治区计量测试研究院 | Detector for magnet yoke type magnetic powder flaw detector |
| CN203259498U (en) * | 2013-03-29 | 2013-10-30 | 国家电网公司 | DC (direct current) magnetic defect detector sensitivity detection device |
Non-Patent Citations (1)
| Title |
|---|
| 蒋慧: "磁轭式磁粉探伤仪提升力的检测装置的研制", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551302A (en) * | 2020-06-12 | 2020-08-18 | 智慧计量检测(海南)有限公司 | Lifting force testing method for magnet yoke type flaw detector |
| CN111551302B (en) * | 2020-06-12 | 2022-02-11 | 智慧计量检测(海南)有限公司 | Lifting force testing method for magnet yoke type flaw detector |
| CN116297818A (en) * | 2023-05-17 | 2023-06-23 | 中国核工业二四建设有限公司 | Nondestructive testing method for steel lining wallboard |
| CN116297818B (en) * | 2023-05-17 | 2023-08-04 | 中国核工业二四建设有限公司 | Nondestructive testing method for steel lining wallboard |
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| CN105300565B (en) | 2019-01-11 |
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