GB782074A - Method and means for detecting cracks in ferro-magnetic bodies - Google Patents
Method and means for detecting cracks in ferro-magnetic bodiesInfo
- Publication number
- GB782074A GB782074A GB875954A GB875954A GB782074A GB 782074 A GB782074 A GB 782074A GB 875954 A GB875954 A GB 875954A GB 875954 A GB875954 A GB 875954A GB 782074 A GB782074 A GB 782074A
- Authority
- GB
- United Kingdom
- Prior art keywords
- specimen
- test
- coils
- reservoir
- test specimen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
782,074. Magnetic tests. BARTLETT, E. E. [Personal representative of BARTLETT, C. (deceased)]. June 24, 1955 [March 25, 1954], No. 8759/54. Class 37. Apparatus for detecting cracks or flaws in a ferro-magnetic body by applying magnetic suspension liquid thereto comprises a frame, at least two upright supports on said frame for supporting the body to be tested, a currentconducting coil around each said support, and means for applying a direct current to said coils. In the embodiment shown, a rectangular casing 1/2 made up of frame 1 and closure walls 2 contain a test liquid reservoir 17 and drain 16 leading from sink 14. A guideway 3 straddles the upper and open end of casing 1/2 and cores 6 of coils 8 register in guideway 3 with test specimen 11 bridging V-blocks 12 engaging sockets in cores 6. To suit test specimens 11 of different lengths one core 6 is adjustable along guideway 3 whilst contact lug 10 of corresponding coil 8 makes sliding contact with bus-bar 9 which connects the two coils 8. A pump 22 driven by motor 19 propels test liquid from reservoir 17 to spray nozzle 29 which is slidable along a stirrup 27 above test specimen 11. In testing specimen 11 the nozzle 29 is adjusted to the required position and test liquid is pumped from reservoir 17 and is sprayed on to the test specimen 11 by nozzle 29 and returned to the reservoir 17 via sink 14 and drain 16. At the same time 2-way switch 36 (see Fig. 3) connects D.C. to coils 8 via full-wave rectifier 35 whereby specimen 11 is magnetized and iron particles in the test liquid bridge any crack in the specimen 11. When testing is completed switch 36 is changed over so as to apply A.C. from transformer 33 to the coils 8 and thus demagnetize specimen 11 and allow iron particles to drop off. The stirrup 27 may be swivelled away from the apparatus to facilitate replacement of test specimen 11. The Provisional Specification states that A.C. may be applied as a pre-testing step to remove any residual magnetism from the test specimen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB875954A GB782074A (en) | 1954-03-25 | 1954-03-25 | Method and means for detecting cracks in ferro-magnetic bodies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB875954A GB782074A (en) | 1954-03-25 | 1954-03-25 | Method and means for detecting cracks in ferro-magnetic bodies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB782074A true GB782074A (en) | 1957-08-28 |
Family
ID=9858729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB875954A Expired GB782074A (en) | 1954-03-25 | 1954-03-25 | Method and means for detecting cracks in ferro-magnetic bodies |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB782074A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3402349A (en) * | 1965-04-30 | 1968-09-17 | Phillip J. Parker | Support apparatus for detecting flaws in ferrous objects by magnetic particle inspection |
| CN103575801A (en) * | 2013-10-25 | 2014-02-12 | 沈阳黎明航空发动机(集团)有限责任公司 | External device for checking integrated system performance of magnetic powder detection equipment |
| CN105158327A (en) * | 2015-09-23 | 2015-12-16 | 安东检测有限公司 | Magnetic powder inspection device |
| CN110426449A (en) * | 2019-08-01 | 2019-11-08 | 捷航设备制造股份有限公司 | A kind of line flaw detection double brake beam magnaflux simultaneously |
-
1954
- 1954-03-25 GB GB875954A patent/GB782074A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3402349A (en) * | 1965-04-30 | 1968-09-17 | Phillip J. Parker | Support apparatus for detecting flaws in ferrous objects by magnetic particle inspection |
| CN103575801A (en) * | 2013-10-25 | 2014-02-12 | 沈阳黎明航空发动机(集团)有限责任公司 | External device for checking integrated system performance of magnetic powder detection equipment |
| CN105158327A (en) * | 2015-09-23 | 2015-12-16 | 安东检测有限公司 | Magnetic powder inspection device |
| CN105158327B (en) * | 2015-09-23 | 2018-07-27 | 安东检测有限公司 | A kind of magnetic powder inspection device |
| CN110426449A (en) * | 2019-08-01 | 2019-11-08 | 捷航设备制造股份有限公司 | A kind of line flaw detection double brake beam magnaflux simultaneously |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CH348213A (en) | Method for operating an electric heater and electric heater for carrying out the method | |
| DE3576209D1 (en) | METHOD FOR REVERSING TRANSVERSAL RESIDUAL MAGNETIZATION BY APPLICATION OF PHASE-ENCODING MAGNETIC FIELD GRADIENTS, AND APPARATUS. | |
| SE403188B (en) | APPARATUS FOR DETECTING SURFACE DEFECTS IN ELECTRIC METAL ELEMENTS | |
| GB782074A (en) | Method and means for detecting cracks in ferro-magnetic bodies | |
| US2764733A (en) | Method and means for detecting flaws | |
| US2061692A (en) | Testing apparatus | |
| ES373626A1 (en) | Method and apparatus for detecting workpiece surface defects and for fixing the location thereof using magnetic particles | |
| US3249861A (en) | Method and apparatus for magnetic flaw detection by depositing magnetic particles ononly the area of the flaw | |
| CN105300859B (en) | For quickly measuring the device of grain-oriented Si steel sheet grain size and neticdomain wall width | |
| DE3883676D1 (en) | Device and method for the detection of magnetic direct current flow deflections of an electrical converter. | |
| GB475369A (en) | Improvements in a method of and apparatus for detecting flaws in magnetizable bodies | |
| US2428471A (en) | Magnetic testing method and apparatus | |
| US2432786A (en) | Machine for testing and marking parts magnetically | |
| US3445759A (en) | Method for detecting flaws,cracks and nonhomogeneity in materials using combined penetrant and magnetic particle systems | |
| CN210015079U (en) | Three-dimensional rotating magnetic field magnetizing device for integral flaw detection of bogie frame | |
| CN209707288U (en) | A magnetization device for measuring platform of hardness tester | |
| JPS59180355A (en) | Online measuring device for crystal grain size of magnetic steel plate | |
| US2447899A (en) | Method and means for detecting flaws in magnetizable objects | |
| GB631313A (en) | Improvements in or relating to a method and apparatus for magnetically inspecting objects | |
| JPS5524692A (en) | Method and apparatus for ceramic parts quality test | |
| GB766353A (en) | Improvements in and relating to non-destructive testing of ferromagnetic workpieces | |
| KR101726067B1 (en) | Magnetic particle testing apparatus | |
| US2416824A (en) | Method and means for magnetic inspection | |
| JPS59226859A (en) | Flaw appearing member for magnetic flaw detecting test | |
| RU2828161C1 (en) | Installation for magnetic particle flaw detection of bearing rings |