CN103557771A - Method of detecting depth of crack indirectly - Google Patents
Method of detecting depth of crack indirectly Download PDFInfo
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- CN103557771A CN103557771A CN201310537013.8A CN201310537013A CN103557771A CN 103557771 A CN103557771 A CN 103557771A CN 201310537013 A CN201310537013 A CN 201310537013A CN 103557771 A CN103557771 A CN 103557771A
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- beam frame
- brake beam
- r6mm
- r8mm
- place
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a method of detecting the depth of a crack indirectly. The method is characterized in that a radius gauge with an appropriate size is adopted for being attached to the R6mm-R8mm position of a brake beam frame, a matched pin gauge is inserted in an attaching gap between the radius gauge and the brake beam frame, the situation that the pin gauge is just inserted serves as the criterion, and the diameter d1 of the pin gauge is recorded; the R6mm-R8mm position of the brake beam frame is polished until a brake-beam-frame magnetic particle flaw detector detects that the brake beam frame is qualified, then the radius gauge is attached to the R6mm-R8mm position of the brake beam frame, another matched pin gauge is inserted in the attaching gap between the radius gauge and the brake beam frame, the situation that the pin gauge is just inserted serves as the criterion, the diameter d2 of the pin gauge is recorded, the polishing depth d is determined by calculating the difference between the diameters of the pin gauges, the polishing depth d satisfies the equation that d=d2-d1, and the value of the d is an approximate value of the depth of the crack. The method has the advantages of being convenient and rapid to achieve, visualized and accurate, changing a conventional method of detecting the depth of the crack only by sensation and visual inspection, solving the problem that the magnetic particle flaw detector only can determine the nature and cannot measure the depth of the crack, and being beneficial to guaranteeing product quality.
Description
Technical field
The present invention relates to a kind of method of indirect detection crack depth, particularly the method for the degree of depth of indirect detection L-B type brake beam frame R6～R8 place crackle, belongs to detection technique field.
Background technology
After brake beam frame Shot Blasting, require integral body to carry out magnetic particle testing, do not allowed crackle to exist, crack depth is less than 0.5mm and can eliminates with method for grinding.Brake beam frame magnaflux can only have flawless by qualitative detection brake beam frame at present, and cannot quantitatively judge the degree of depth of crackle, and particularly the crack depth detection difficulty at brake beam frame R6mm～R8mm place is large.
Therefore need to find the crack depth method at a kind of suitable batch production testing brake beam frame R6mm～R8mm place, changed in the past and detected crack depth near the means of feeling, estimating, solving magnaflux can only the qualitative difficult problem that cannot quantitatively detect crack depth, thereby guarantees product quality.
Summary of the invention
The object of the invention is the problem that the crack depth for brake beam frame R6mm～R8mm place cannot detect, a kind of method of indirect detection crack depth is provided.
The technical solution adopted for the present invention to solve the technical problems is as follows:
At brake beam frame magnaflux, qualitatively judging brake beam frame R6mm～R8mm place exists under the prerequisite of crackle, select sizeable R rule to recline with brake beam frame R6mm～R8mm place, one supporting divider is inserted in the middle of the gap that R rule and brake beam frame R6mm～R8mm place recline, with divider, just insert and be as the criterion, record divider diameter d 1, polishing brake beam frame R6mm～R8mm place, during polishing, require rounding off, surfaceness is no more than 50 μ m, till being polished to naked eyes judgements crackle and being eliminated, after brake beam frame magnetic powder inspection machine testing, if crackle is not completely eliminated, proceed slight polishing, until qualified through brake beam frame magnetic powder inspection machine testing, use again the R rule identical with initially selecting specification to recline with brake beam frame R6mm～R8mm place, an other supporting divider is inserted in the middle of the gap that R rule and brake beam frame R6mm～R8mm place recline, with divider, just insert and be as the criterion, record divider diameter d 2, by calculating the difference of divider diameter and then judging grinding depth d, d=d2-d1, the value of d is the approximate value of crack depth.
Advantage of the present invention is: convenient and swift, intuitively accurate, changed by feel only, the means of range estimation detect crack depth in the past, and having solved magnaflux can only the qualitative difficult problem that cannot quantitatively detect crack depth, is conducive to the assurance of product quality.
Accompanying drawing explanation
Fig. 1 is the testing process schematic diagram of invention.
In figure: 1, L-B type brake beam frame, 2, R rule, 3, divider.
Embodiment
Embodiment:
By utilizing brake beam frame R6-R8 lifting table drilling and milling machine to produce L-B type brake beam frame, to guarantee the R(arc radius at brake beam frame R6mm～R8mm place of batch production) value is relatively fixing.
In specific implementation process, at brake beam frame magnaflux, qualitatively judging brake beam frame R6mm～R8mm place exists under the prerequisite of crackle, before polishing brake beam frame R6mm～R8mm place, by selecting a sizeable R to advise with brake beam frame R6mm～R8mm place, recline, one supporting divider is inserted in the middle of the gap that R rule and brake beam frame R6mm～R8mm place recline, with divider, just insert and be as the criterion, record divider diameter d 1, polishing brake beam frame R6mm～R8mm place, during polishing, require rounding off, surfaceness is no more than 50 μ m, till being polished to naked eyes judgements crackle and being eliminated, after brake beam frame magnetic powder inspection machine testing, if crackle is not completely eliminated, proceed slight polishing, until qualified through brake beam frame magnetic powder inspection machine testing, use again the R rule identical with initially selecting specification to recline with brake beam frame R6mm～R8mm place, an other supporting divider is inserted in the middle of the gap that R rule and brake beam frame R6mm～R8mm place recline, with divider, just insert and be as the criterion, record divider diameter d 2, by calculating the difference of divider diameter and then judging grinding depth d, d=d2-d1, the value of d is the approximate value of crack depth.If the value of d is less than 0.5mm, judge that this brake beam frame is as specification product; If the value of d is more than or equal to 0.5mm, judges that this brake beam frame is as substandard product, thereby guaranteed the quality of product.
Claims (1)
1. the method for an indirect detection crack depth, it is characterized in that: at brake beam frame magnaflux, qualitatively judge brake beam frame R6mm～R8mm place and exist under the prerequisite of crackle, select sizeable R rule to recline with brake beam frame R6mm～R8mm place, one supporting divider is inserted in the middle of the gap that R rule and brake beam frame R6mm～R8mm place recline, with divider, just insert and be as the criterion, record divider diameter d 1, polishing brake beam frame R6mm～R8mm place, during polishing, require rounding off, surfaceness is no more than 50 μ m, till being polished to naked eyes judgements crackle and being eliminated, after brake beam frame magnetic powder inspection machine testing, if crackle is not completely eliminated, proceed slight polishing, until qualified through brake beam frame magnetic powder inspection machine testing, use again the R rule identical with initially selecting specification to recline with brake beam frame R6mm～R8mm place, an other supporting divider is inserted in the middle of the gap that R rule and brake beam frame R6mm～R8mm place recline, with divider, just insert and be as the criterion, record divider diameter d 2, by calculating the difference of divider diameter and then judging grinding depth d, d=d2-d1, the value of d is the approximate value of crack depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310537013.8A CN103557771B (en) | 2013-11-04 | 2013-11-04 | A kind of method of indirect detection crack depth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310537013.8A CN103557771B (en) | 2013-11-04 | 2013-11-04 | A kind of method of indirect detection crack depth |
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| Publication Number | Publication Date |
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| CN103557771A true CN103557771A (en) | 2014-02-05 |
| CN103557771B CN103557771B (en) | 2016-03-09 |
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| CN201310537013.8A Active CN103557771B (en) | 2013-11-04 | 2013-11-04 | A kind of method of indirect detection crack depth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107380196A (en) * | 2017-07-28 | 2017-11-24 | 合肥杰代机电科技有限公司 | Inspection method is snapped at goods train brake beam arcuate rod end cephalic slit line, roller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55152453A (en) * | 1979-05-18 | 1980-11-27 | Kawasaki Steel Corp | Flaw detector with magnetic particle |
| JPS60152938A (en) * | 1984-01-20 | 1985-08-12 | Mitsubishi Heavy Ind Ltd | Defect extracting method in magnetic particle inspection |
| CN101113971A (en) * | 2007-08-31 | 2008-01-30 | 天津钢管集团股份有限公司 | Roll processing flaw detecting method |
| CN203259489U (en) * | 2013-05-17 | 2013-10-30 | 武汉工程大学 | Oil testing device |
-
2013
- 2013-11-04 CN CN201310537013.8A patent/CN103557771B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55152453A (en) * | 1979-05-18 | 1980-11-27 | Kawasaki Steel Corp | Flaw detector with magnetic particle |
| JPS60152938A (en) * | 1984-01-20 | 1985-08-12 | Mitsubishi Heavy Ind Ltd | Defect extracting method in magnetic particle inspection |
| CN101113971A (en) * | 2007-08-31 | 2008-01-30 | 天津钢管集团股份有限公司 | Roll processing flaw detecting method |
| CN203259489U (en) * | 2013-05-17 | 2013-10-30 | 武汉工程大学 | Oil testing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107380196A (en) * | 2017-07-28 | 2017-11-24 | 合肥杰代机电科技有限公司 | Inspection method is snapped at goods train brake beam arcuate rod end cephalic slit line, roller |
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| CN103557771B (en) | 2016-03-09 |
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Address after: 014032, Baotou, the Inner Mongolia Autonomous Region two mailbox technology and Information Technology Department Patentee after: Inner Mongolia First Machinery Group Limited by Share Ltd Address before: 014030 the first functional district of rare earth hi tech Industrial Development Zone, the Inner Mongolia Autonomous Region, Baotou Patentee before: Baotou Beifang Venture Co., Ltd. |
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Effective date of registration: 20190123 Address after: 014030 Office on the West Side of 8th Floor of Vehicle Building, Qingshan District, Baotou City, Inner Mongolia Autonomous Region Patentee after: Baotou North entrepreneurship limited liability company Address before: 014032 Ministry of Science, Technology and Informatization of No.2 Mailbox in Baotou City, Inner Mongolia Autonomous Region Patentee before: Inner Mongolia First Machinery Group Limited by Share Ltd |
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