CN105588672A - Strain gage mounting method for detecting vertical residual stress of grooved steel rail head - Google Patents
Strain gage mounting method for detecting vertical residual stress of grooved steel rail head Download PDFInfo
- Publication number
- CN105588672A CN105588672A CN201510958997.6A CN201510958997A CN105588672A CN 105588672 A CN105588672 A CN 105588672A CN 201510958997 A CN201510958997 A CN 201510958997A CN 105588672 A CN105588672 A CN 105588672A
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- CN
- China
- Prior art keywords
- rail head
- rail
- steel rail
- grooved steel
- residual stress
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a strain gage mounting method for detecting the vertical residual stress of a grooved steel rail head and aims to provide a strain gage mounting method for detecting the vertical residual stress of the grooved steel rail head. The method comprises steps of on the 500mm central point of a 1000mm-long grooved steel rail head, drawing a line vertical to the length direction of the grooved steel rail head; and drawing a line along a direction from the thinnest position of the side rail web of the grooved steel rail head to the grooved steel rail head, wherein the intersection of the two lines is a strain gage mounting position, and 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 groove-shape rail rail head 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 grooved rail is a different in nature cross section, compared with common rail, also has a stopper slot, unbalance stressEven, so the test of rail grooved rail head is also very important. Grooved rail rail head is different in nature structure, shouldBecoming sheet and be attached to the STRESS VARIATION situation that where could fully reflect rail head of rail, is very important. Not yetThe report that someone tests with strain gauge method.
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 groove-shape rail rail head longitudinal residual stressSheet method, to detect groove-shape rail rail head longitudinal residual stress.
For reaching above-mentioned purpose, a kind of pasting method that detects groove-shape rail rail head longitudinal residual stress of the present invention,Comprise the following steps:
Be on the central point of 500mm of 1000mm groove-shape rail rail head in length, draw one perpendicular to rail headThe line of length direction, draws a line along rail head siding track waist thinnest part to rail head direction, two line intersection points are paster positionPut 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 grooved rail rail head, with common rail head of rail comparison,The stress concentration point that has found groove-shape rail rail head, has found patch location, has had pasting method, according toThe cutting method of EN standard, has found grooved 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 groove-shape 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.
As shown in Figure 1, be on the central point of 500mm of 1000mm groove-shape rail rail head in length, draw oneBar is perpendicular to the line of rail head length direction, along (rail head side is not groove side) web of the rail thinnest part to rail head directionDraw a line, two line intersection points are patch location, with emery wheel polished silicon wafer polishing paster point, clean with cotton ball soaked in alcoholIts surface, is bonded at patch location foil gauge with 406 glue, connects with binding post and foil gauge 1, connectsConnect DH3816 static stress and deformation measuring instrument; Foil gauge specification 3mm × 3mm, model BX-120-3AA,Foil gauge direction parallels to the axis, and measures initial value to be-160MPa.
With band saw or circular saw, by cutting method, on the central point of road groove rail head of rail tread, along lengthDirection both sides 10mm, draws two lines perpendicular to rail head length direction, as line of cut 2, along laterally cuttingDisconnected, obtain the rail sample of wide 20mm, then survey residual stress end value and be-360MPa, so :-360MPa (end value)+160MPa=-200MPa (final value), can pass through EN13674-1 " railway steel steelRail " in standard, flange of rail residual-stress value must not be greater than 250MPa, compare, if large explanation does not conform toLattice.
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 groove-shape rail rail head longitudinal residual stress, it is characterized in that comprising followingStep:
Be on the central point of 500mm of 1000mm groove-shape rail rail head in length, draw one perpendicular to rail headThe line of length direction, draws a line along rail head siding track waist thinnest part to rail head direction, two line intersection points are paster positionPut foil gauge specification 3mm × 3mm, model BX-120-3AA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510958997.6A CN105588672A (en) | 2015-12-17 | 2015-12-17 | Strain gage mounting method for detecting vertical residual stress of grooved steel rail head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510958997.6A CN105588672A (en) | 2015-12-17 | 2015-12-17 | Strain gage mounting method for detecting vertical residual stress of grooved steel rail head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105588672A true CN105588672A (en) | 2016-05-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510958997.6A Pending CN105588672A (en) | 2015-12-17 | 2015-12-17 | Strain gage mounting method for detecting vertical residual stress of grooved steel rail head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105588672A (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 CN201510958997.6A patent/CN105588672A/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 | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160518 |
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| RJ01 | Rejection of invention patent application after publication |