CN105588671A - Strain gage mounting method for detecting vertical residual stress of turnout steel rail head - Google Patents
Strain gage mounting method for detecting vertical residual stress of turnout steel rail head Download PDFInfo
- Publication number
- CN105588671A CN105588671A CN201510958996.1A CN201510958996A CN105588671A CN 105588671 A CN105588671 A CN 105588671A CN 201510958996 A CN201510958996 A CN 201510958996A CN 105588671 A CN105588671 A CN 105588671A
- Authority
- CN
- China
- Prior art keywords
- rail
- rail head
- residual stress
- steel rail
- strain gage
- 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.)
- Pending
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
Abstract
The invention discloses a strain gage mounting method for detecting the vertical residual stress of a turnout steel rail head and aims to provide a strain gage mounting method for detecting the vertical residual stress of the turnout steel rail head. The method comprises steps of on the central point of a 1000mm-long steel rail head, using the central point of the turnout rail tread as a strain gage mounting position, wherein the strain gage has a specification of 3mm*3mm and a model number of BX-120-3AA.
Description
Technical field
The present invention relates to rail head of rail residual stress detection field, particularly relate to a kind of railroad turnout steel rail rail that detectsThe pasting method of longitudinal residual stress.
Background technology
EN European standard has only proposed method to the longitudinal stress at the bottom of Rail, and test side to rail head stressMethod does not propose; Rail head tread is the part that rail directly contacts with wheel, the wearing and tearing of utmost point meaning, fatigue cracking,In addition turnout rail is a different in nature cross section, discontinuity, so to the test of steel-rail rail-road switch rail head be alsoVery necessary. The report that the strain gauge method that is out of use is tested.
What residual stress physical test method adopted has: x-ray method, method of magnetic, brittle coating method, opticsMethod, acoustic method, electric resistance strain film method, wherein electric resistance strain film method is domestic and international more generally acknowledged one sideMethod, the residual stress test that rail is longitudinal, adopts strain gauge method at present, carries out European EN13674-1 markAccurate.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of subsides that detect railroad turnout steel rail rail head longitudinal residual stressSheet method, to detect railroad turnout steel rail rail head longitudinal residual stress.
For reaching above-mentioned purpose, a kind of pasting method that detects railroad turnout steel rail rail head longitudinal residual stress of the present invention,Comprise the following steps:
Be on the central point of 1000mm rail head of rail in length, the central point of the switch track tread of choosing the road through is as pasterPosition, foil gauge specification 3mm × 3mm, model BX-120-3AA.
The invention difference from existing technology is that the present invention has obtained following technique effect:
The present invention passes through the detection to each point on the whole tread of turnout rail rail head, with common rail head of rail comparison,The stress concentration point that has found railroad turnout steel rail rail head, has found patch location, has had pasting method, according toThe cutting method of EN standard, has found turnout rail rail head residual stress test method.
Below in conjunction with accompanying drawing, the invention will be further described.
Brief description of the drawings
Fig. 1 is railroad turnout steel rail structural representation of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, technical characterictic and advantage with other that the present invention is above-mentioned are done in more detailBright.
Be on the central point of 1000mm rail head of rail in length, the central point of the switch track tread of choosing the road through is as pasterPosition, with emery wheel polished silicon wafer polishing paster point, with clean its surface of cotton ball soaked in alcohol, with 406 glue strainSheet is bonded at patch location, connects with binding post and foil gauge 1, connects DH3816 static stress and deformation and surveysAmount instrument; Foil gauge specification 3mm × 3mm, model BX-120-3AA, the length direction of foil gauge silk is parallel toAxis, measures initial value for-170MPa;
With band saw or circular saw, by cutting method, on the central point of railroad turnout steel rail tread, along its lengthBoth sides 10mm, draws two lines perpendicular to length direction, as line of cut 2, along transversely cutting, obtains wideThe rail sample of 20mm, then surveys residual stress end value-350Mpa so :-350MPa (end value)+ 170MPa=-180MPa, can pass through in EN13674-1 " railway steel rail " standard, and the flange of rail is remaining shouldPower value must not be greater than 250MPa, compares, if illustrate greatly defective.
Above-described embodiment is described the preferred embodiment of the present invention, not to thisBright scope limits, and designs under the prerequisite of spirit those of ordinary skill in the art not departing from the present inventionVarious distortion and improvement that technical scheme of the present invention is made, all should fall into the claims in the present invention book and determineProtection domain in.
Claims (1)
1. detect a pasting method for railroad turnout steel rail rail head longitudinal residual stress, it is characterized in that comprising followingStep:
Be on the central point of 1000mm rail head of rail in length, the central point of the switch track tread of choosing the road through is as pasterPosition, foil gauge specification 3mm × 3mm, model BX-120-3AA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510958996.1A CN105588671A (en) | 2015-12-17 | 2015-12-17 | Strain gage mounting method for detecting vertical residual stress of turnout steel rail head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510958996.1A CN105588671A (en) | 2015-12-17 | 2015-12-17 | Strain gage mounting method for detecting vertical residual stress of turnout steel rail head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105588671A true CN105588671A (en) | 2016-05-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510958996.1A Pending CN105588671A (en) | 2015-12-17 | 2015-12-17 | Strain gage mounting method for detecting vertical residual stress of turnout steel rail head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105588671A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6026687A (en) * | 1995-07-14 | 2000-02-22 | Jury; Brent Felix | Stress testing and relieving method and apparatus |
| CN1619269A (en) * | 2003-11-18 | 2005-05-25 | 吴良善 | Railroad rail stress testing method |
| CN102765023A (en) * | 2012-07-10 | 2012-11-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for polishing surface of steel rail and method for detecting residual stress of steel rail |
| CN103234666A (en) * | 2013-04-26 | 2013-08-07 | 内蒙古包钢钢联股份有限公司 | Method for testing residual stress of steel rail |
| CN104406719A (en) * | 2014-12-23 | 2015-03-11 | 内蒙古包钢钢联股份有限公司 | Strain gauge mounting method for detecting longitudinal residual stress of H-steel |
| CN104458068A (en) * | 2014-12-23 | 2015-03-25 | 内蒙古包钢钢联股份有限公司 | H-shaped steel longitudinal residual stress detecting method |
| CN104483045A (en) * | 2014-12-23 | 2015-04-01 | 内蒙古包钢钢联股份有限公司 | Detection method for longitudinal residual stress of H-section steel |
| CN104568232A (en) * | 2014-12-26 | 2015-04-29 | 内蒙古包钢钢联股份有限公司 | Method for detecting longitudinal residual stress of bar |
| CN104596789A (en) * | 2014-12-23 | 2015-05-06 | 内蒙古包钢钢联股份有限公司 | Cutting method for detecting longitudinal residual stress of H section steel |
-
2015
- 2015-12-17 CN CN201510958996.1A patent/CN105588671A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6026687A (en) * | 1995-07-14 | 2000-02-22 | Jury; Brent Felix | Stress testing and relieving method and apparatus |
| CN1619269A (en) * | 2003-11-18 | 2005-05-25 | 吴良善 | Railroad rail stress testing method |
| CN102765023A (en) * | 2012-07-10 | 2012-11-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for polishing surface of steel rail and method for detecting residual stress of steel rail |
| CN103234666A (en) * | 2013-04-26 | 2013-08-07 | 内蒙古包钢钢联股份有限公司 | Method for testing residual stress of steel rail |
| CN104406719A (en) * | 2014-12-23 | 2015-03-11 | 内蒙古包钢钢联股份有限公司 | Strain gauge mounting method for detecting longitudinal residual stress of H-steel |
| CN104458068A (en) * | 2014-12-23 | 2015-03-25 | 内蒙古包钢钢联股份有限公司 | H-shaped steel longitudinal residual stress detecting method |
| CN104483045A (en) * | 2014-12-23 | 2015-04-01 | 内蒙古包钢钢联股份有限公司 | Detection method for longitudinal residual stress of H-section steel |
| CN104596789A (en) * | 2014-12-23 | 2015-05-06 | 内蒙古包钢钢联股份有限公司 | Cutting method for detecting longitudinal residual stress of H section steel |
| CN104568232A (en) * | 2014-12-26 | 2015-04-29 | 内蒙古包钢钢联股份有限公司 | Method for detecting longitudinal residual stress of bar |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160518 |
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| RJ01 | Rejection of invention patent application after publication |