CN104596789A - Cutting method for detecting longitudinal residual stress of H section steel - Google Patents
Cutting method for detecting longitudinal residual stress of H section steel Download PDFInfo
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- CN104596789A CN104596789A CN201410804417.3A CN201410804417A CN104596789A CN 104596789 A CN104596789 A CN 104596789A CN 201410804417 A CN201410804417 A CN 201410804417A CN 104596789 A CN104596789 A CN 104596789A
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- section steel
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Abstract
The invention relates to a cutting method for detecting the longitudinal residual stress of H section steel. The cutting method is characterized by comprising the following steps: measuring a section steel segment on the H section steel according to the ratio of length to width of 5 to 1; measuring two side segments of 15mm respectively along the length direction from the middle of the measured section steel segment; cutting along the peripheral direction, cutting a section steel sheet with the length of 30mm as a sample, and measuring the residual stress final value of the sample. The cutting method has the advantages that the operation is relatively simple and convenient; the longitudinal residual stress of the H section steel can be detected rapidly and accurately; the labor intensity is reduced; the labor efficiency is improved; the cost is reduced; the yield of the H section steel is improved.
Description
Technical field
The present invention relates to a kind of cutting method detecting H profile steel longitudinal residual stress, belong to detection technique field.
Background technology
The aligning of H profile steel is one important procedure in production run, determines final mass and the precision of H profile steel.The H profile steel of different size is adopted to the straightening process of its correspondence, in the guarantee edge of a wing and web not flexural deformation, when reaching overall flatness, reduce unrelieved stress, avoid the phenomenon of aligning rear nose and bend fracture to occur.
Mechanical means during unrelieved stress detects has: boring method, fluting method, patterning method.Be so the key detected where holing, slotting, cut, the position of opening (cut, bore) is not to detection not out result.Because H profile steel residual stress test does not have standard, do not detect the report of H profile steel with strain gauge method, the selection of cutting method and test samples size seems particularly important, and how to detect is the problem studied at present.
Summary of the invention
The object of this invention is to provide a kind of cutting method that fast, accurately can detect the detection H profile steel longitudinal residual stress of H profile steel longitudinal residual stress.
Technical scheme of the present invention is as follows:
In H profile steel, measure shaped steel section in the ratio of length breadth ratio 5:1, respectively measure 15mm to both sides along its length at the middle part of the shaped steel section measured, circumferentially row cutting, intercepted length be 30mm shaped steel fragment as sample, measure the unrelieved stress final value of sample.
Advantage of the present invention is: operate easier, can detect H profile steel longitudinal residual stress fast and accurately, decrease labour intensity, improve efficiency, save cost, improve the lumber recovery of H profile steel.
Embodiment
In H profile steel, measure shaped steel section in the ratio of length breadth ratio 5:1, respectively measure 15mm to both sides along its length at the middle part of the shaped steel section measured, circumferentially row cutting, intercepted length be 30mm shaped steel fragment as sample, measure the unrelieved stress final value of sample.
Because the stress surveyed is meridional stress, so cut direction is the horizontal direction of H profile steel, make workpiece when not fettering, discharge stress completely, could measure truly H profile steel longitudinal time force-bearing situation, cut direction is incorrect, and the stress value measured is not meridional stress value, or does not measure result or data are inaccurate.
Claims (1)
1. one kind is detected the cutting method of H profile steel longitudinal residual stress, it is characterized in that: in H profile steel, measure shaped steel section in the ratio of length breadth ratio 5:1, respectively 15mm is measured to both sides along its length at the middle part of the shaped steel section measured, circumferentially row cutting, intercepted length be 30mm shaped steel fragment as sample, measure the unrelieved stress final value of sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410804417.3A CN104596789A (en) | 2014-12-23 | 2014-12-23 | Cutting method for detecting longitudinal residual stress of H section steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410804417.3A CN104596789A (en) | 2014-12-23 | 2014-12-23 | Cutting method for detecting longitudinal residual stress of H section steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104596789A true CN104596789A (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410804417.3A Pending CN104596789A (en) | 2014-12-23 | 2014-12-23 | Cutting method for detecting longitudinal residual stress of H section steel |
Country Status (1)
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| CN (1) | CN104596789A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547536A (en) * | 2015-12-17 | 2016-05-04 | 内蒙古包钢钢联股份有限公司 | Detection method for vertical residual stress of channel type rail head |
| CN105588672A (en) * | 2015-12-17 | 2016-05-18 | 内蒙古包钢钢联股份有限公司 | Strain gage mounting method for detecting vertical residual stress of grooved steel rail head |
| CN105588671A (en) * | 2015-12-17 | 2016-05-18 | 内蒙古包钢钢联股份有限公司 | Strain gage mounting method for detecting vertical residual stress of turnout steel rail head |
| CN105588670A (en) * | 2015-12-17 | 2016-05-18 | 内蒙古包钢钢联股份有限公司 | Method for detecting vertical residual stress of turnout steel rail head |
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| CN1979161A (en) * | 2005-11-30 | 2007-06-13 | 宝山钢铁股份有限公司 | Method for detecting residual strain of thermal-continuous-rolled high-strength steel plate |
| CN102818763A (en) * | 2012-07-30 | 2012-12-12 | 首钢总公司 | Hot-rolled steel plate residual stress calculating method suitable to production field |
| CN103278443A (en) * | 2013-04-26 | 2013-09-04 | 内蒙古包钢钢联股份有限公司 | Technology for testing seamless tube residual stress by pasting method |
| US20140305186A1 (en) * | 2013-04-13 | 2014-10-16 | John Fahd Fadlo Touma | Method and apparatus for full scale dynamic footing load test |
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2014
- 2014-12-23 CN CN201410804417.3A patent/CN104596789A/en active Pending
Patent Citations (4)
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| CN1979161A (en) * | 2005-11-30 | 2007-06-13 | 宝山钢铁股份有限公司 | Method for detecting residual strain of thermal-continuous-rolled high-strength steel plate |
| CN102818763A (en) * | 2012-07-30 | 2012-12-12 | 首钢总公司 | Hot-rolled steel plate residual stress calculating method suitable to production field |
| US20140305186A1 (en) * | 2013-04-13 | 2014-10-16 | John Fahd Fadlo Touma | Method and apparatus for full scale dynamic footing load test |
| CN103278443A (en) * | 2013-04-26 | 2013-09-04 | 内蒙古包钢钢联股份有限公司 | Technology for testing seamless tube residual stress by pasting method |
Non-Patent Citations (2)
| Title |
|---|
| 张壮南: "残余应力对单轴对称工字梁稳定承载力的影响", 《哈尔滨工业大学学报》 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547536A (en) * | 2015-12-17 | 2016-05-04 | 内蒙古包钢钢联股份有限公司 | Detection method for vertical residual stress of channel type rail head |
| CN105588672A (en) * | 2015-12-17 | 2016-05-18 | 内蒙古包钢钢联股份有限公司 | Strain gage mounting method for detecting vertical residual stress of grooved steel rail head |
| CN105588671A (en) * | 2015-12-17 | 2016-05-18 | 内蒙古包钢钢联股份有限公司 | Strain gage mounting method for detecting vertical residual stress of turnout steel rail head |
| CN105588670A (en) * | 2015-12-17 | 2016-05-18 | 内蒙古包钢钢联股份有限公司 | Method for detecting vertical residual stress of turnout steel rail head |
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Application publication date: 20150506 |
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| RJ01 | Rejection of invention patent application after publication |