CN102865948A - Method for determining residual butt welding stress of aluminum alloy sheets - Google Patents
Method for determining residual butt welding stress of aluminum alloy sheets Download PDFInfo
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- CN102865948A CN102865948A CN2012103653299A CN201210365329A CN102865948A CN 102865948 A CN102865948 A CN 102865948A CN 2012103653299 A CN2012103653299 A CN 2012103653299A CN 201210365329 A CN201210365329 A CN 201210365329A CN 102865948 A CN102865948 A CN 102865948A
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Abstract
The invention discloses a method for determining residual butt welding stress of aluminum alloy sheets. On a condition of a plane stress field formed at butt welding joints of sheets, the sheets are slitted by a linear cutting method along weld seams longitudinally or transversely, so that welding stress can be released. Precise marked lines are engraved on a measuring surface of a weld part before welding, distances of the marked lines are measured by a microscope before welding, after welding and after slitting respectively, a corresponding strain increment can be solved according to increment of the distances of the marked lines, and finally residual stress is solved according to the strain increment. The method is visual, simple and convenient and applicable to determining residual butt welding stress of aluminum alloy sheets on testing conditions; and measured results are good in repeatability, reproducibility and comparability.
Description
Technical field
The present invention relates to a kind of Metal Material Welding residual stress analysis method, especially a kind of aluminium alloy sheet jam welding welding residual stress assay method.
Background technology
Be GB/T24179-2009 metal material residual stress analysis impression Strain Method with the immediate prior art of the present invention in the prior art.The impression Strain Method adopts the instruments such as indentation test machine, foil gauge and strainmeter to carry out the monitor strain amount, then utilizes Hooke's law to calculate welding residual stress.This fado is applicable to a certain surface of position residual stress analysis of welding joint, and has a lot of technological difficulties at aspects such as strain gauge adhesion, calibration curve, finite element analyses.And then the present invention utilizes Hooke's law to calculate welding residual stress by the variable quantity of microscopic examination exemplar ruling span behind welding front and back and slitting.Therefore compare with the impression Strain Method, obviously this law is simpler, and also more accurate for the measurement of aluminium alloy sheet jam welding welding residual stress.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of aluminium alloy sheet jam welding welding residual stress assay method, measure near the welding residual stress of aluminium alloy sheet Butt Joint.
The objective of the invention is to be achieved through the following technical solutions:
A kind of aluminium alloy sheet jam welding welding residual stress assay method may further comprise the steps:
1) before the aluminium sheet welding, in the welding heat affected zone of aluminium sheet, be not more than the mark line of 0.05mm along at least 2 stria width of direction delineation parallel with weld seam with scribing tool, two identical mark lines of spacing are one group in the setting weld seam homonymy, utilize survey instrument to measure the spacing of 2 mark lines in every group;
2) after the aluminium sheet welding, again measure the spacing of 2 mark lines in every group;
3) downcut at least 1 slitting along the mark line vertical direction, measure on the slitting spacing of 2 mark lines in every group, calculate and 2) step compares the variable quantity of answering spacing;
4) utilize Hooke's law to calculate welding residual stress.
Further, during described step 1) marking line, 2 mark line spacings are made as 50mm in every group.
The invention has the beneficial effects as follows:
Method of testing is intuitively easy, and measurement result has preferably repeatability, repeatability and comparability, is applicable to the weldering residual stress analysis of aluminium alloy sheet jam welding under test condition.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being apparent to those skilled in the art to investigating hereinafter, perhaps can obtain from the practice of the present invention instruction.Target of the present invention and other advantages can realize and obtain by following instructions.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Accompanying drawing 1 is the mark line synoptic diagram after the welding of embodiment 1 aluminium sheet.
Embodiment
Below will by a specific embodiment, the present invention be described in detail.Should be appreciated that preferred embodiment only for the present invention is described, rather than in order to limit protection scope of the present invention.
Step of the present invention is as follows:
1) before the aluminium sheet welding, in the welding heat affected zone of aluminium sheet, be not more than the mark line of 0.05mm along at least 2 stria width of direction delineation parallel with weld seam with scribing tool, two identical mark lines of spacing are one group in the setting weld seam homonymy, utilize survey instrument to measure the spacing of 2 mark lines in every group;
2) after the aluminium sheet welding, again measure the spacing of 2 mark lines in every group;
3) downcut at least 1 slitting along the mark line vertical direction, measure on the slitting spacing of 2 mark lines in every group, calculate and 2) step compares the variable quantity of answering spacing;
4) utilize Hooke's law to calculate welding residual stress.
It is as follows to utilize the present invention to measure the welding residual stress of 6005A-T6 aluminium alloy 3mm thickness sheet material jam welding test specimen:
Testpieces: material 6005A-T6, sheet metal thickness 3.0mm, testpieces material base size (long * wide): 750 * 150(mm), cut direction for vertical.Testpieces size after the welding (long * wide): 750 * 300(mm) weld seams also are vertical.The mother metal tensile property: tensile strength is 317MPa, and yield strength is 273MPa, and elongation after fracture is 13.2%, and elastic modulus E is 68760MPa.Welding joint tensile strength is 182MPa, and yield strength is 148MPa;
1) before the aluminium sheet welding, the mark line that is not more than 0.05mm along 13 stria width of the circuit parallel with weld seam delineation with special-purpose scribing tool on 2 blocks of aluminium sheets utilizes 19JC type tool microscope (precision 0.0005mm) to measure the actual pitch that spacing is about 2 grooves of 50 mm aluminium sheet 15 five equilibriums
2) with after the welding of 2 blocks of aluminium sheets, utilize 19JC type tool microscope (precision 0.0005mm) to measure respectively on every block of aluminium sheet the actual pitch that spacing separately is about 2 grooves of 50 mm
3) utilize line cutting along the mark line vertical direction about respectively downcut 1 slitting on two blocks of aluminium sheets, utilize 19JC type tool microscope (precision 0.0005mm) to measure the actual pitch of every group echo line on 2 slittings
, obtain with weld after and do not compare the variable quantity of every group echo distance between centers of tracks before the slitting
And strain increment
4) utilize Hooke's law to calculate welding residual stress
For present embodiment 1) also can not wait division line in the delineation spacing when being the mark line of 50mm in the step, be the mark line of 50mm as long as can mark many group spacings; The spacing of mark line also can be set as other numeric ratios such as 40mm, 30mm, 60mm etc. in addition.
Measurement data and result of calculation see the following form in the present embodiment:
[0013]Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of the technical program, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (2)
1. aluminium alloy sheet jam welding welding residual stress assay method is characterized in that: may further comprise the steps:
1) before the aluminium sheet welding, in the welding heat affected zone of aluminium sheet, be not more than the mark line of 0.05mm along at least 2 stria width of direction delineation parallel with weld seam with scribing tool, two identical mark lines of spacing are one group in the setting weld seam homonymy, utilize survey instrument to measure the spacing of 2 mark lines in every group;
2) after the aluminium sheet welding, again measure the spacing of 2 mark lines in every group;
3) downcut at least 1 slitting along the mark line vertical direction, measure on the slitting spacing of 2 mark lines in every group, calculate and 2) step compares the variable quantity of answering spacing;
4) utilize Hooke's law to calculate welding residual stress.
2. a kind of aluminium alloy sheet jam welding welding residual stress assay method according to claim 1 is characterized in that: described 1) step is when the marking line, and 2 mark line spacings are 50mm in every group.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103653299A CN102865948A (en) | 2012-09-27 | 2012-09-27 | Method for determining residual butt welding stress of aluminum alloy sheets |
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| CN2012103653299A CN102865948A (en) | 2012-09-27 | 2012-09-27 | Method for determining residual butt welding stress of aluminum alloy sheets |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103557971A (en) * | 2013-11-05 | 2014-02-05 | 中国航空工业集团公司西安飞机设计研究所 | Measuring method of structural residual stress |
| CN103808438A (en) * | 2014-01-16 | 2014-05-21 | 浙江工业大学 | Method for measuring sheet welding residual stress |
| CN106769286A (en) * | 2016-11-29 | 2017-05-31 | 中国科学院金属研究所 | A kind of preparation method and application of tabular welded unit fatigue testing specimen |
| CN107407606A (en) * | 2015-03-05 | 2017-11-28 | 株式会社神户制钢所 | Residual stress estimates method and residual stress estimating device |
| CN108548624A (en) * | 2018-04-12 | 2018-09-18 | 海信（山东）空调有限公司 | Residual stress test method for compressor piping |
| CN113237583A (en) * | 2021-05-13 | 2021-08-10 | 中南大学 | Method for evaluating and predicting residual stress of magnesium alloy cylindrical part |
| CN113883992A (en) * | 2021-12-06 | 2022-01-04 | 上交(徐州)新材料研究院有限公司 | In-plane welding deformation measuring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1375689A (en) * | 2001-03-16 | 2002-10-23 | 中国科学院金属研究所 | Residual stress measuring method |
| CN1415066A (en) * | 1999-10-29 | 2003-04-30 | 费劳斯全息摄影技术公司 | Method and device for real non-destructive determination of residual stresses in objects by optical holographic interferometry technique |
| JP2009036669A (en) * | 2007-08-02 | 2009-02-19 | Toshiba Corp | Welding residual stress analysis method and welding residual stress analysis system |
| JP2009128085A (en) * | 2007-11-21 | 2009-06-11 | Toshiba Corp | Residual stress analysis method by finite element method |
| CN101539506A (en) * | 2009-03-24 | 2009-09-23 | 西安交通大学 | Method for measuring welding residual stress |
-
2012
- 2012-09-27 CN CN2012103653299A patent/CN102865948A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1415066A (en) * | 1999-10-29 | 2003-04-30 | 费劳斯全息摄影技术公司 | Method and device for real non-destructive determination of residual stresses in objects by optical holographic interferometry technique |
| CN1375689A (en) * | 2001-03-16 | 2002-10-23 | 中国科学院金属研究所 | Residual stress measuring method |
| JP2009036669A (en) * | 2007-08-02 | 2009-02-19 | Toshiba Corp | Welding residual stress analysis method and welding residual stress analysis system |
| JP2009128085A (en) * | 2007-11-21 | 2009-06-11 | Toshiba Corp | Residual stress analysis method by finite element method |
| CN101539506A (en) * | 2009-03-24 | 2009-09-23 | 西安交通大学 | Method for measuring welding residual stress |
Non-Patent Citations (2)
| Title |
|---|
| 宋天民: "《焊接残余应力的产生与消除》", 25 August 2010 * |
| 熊健民等: "厚板焊接中焊接残余应力的分布规律", 《湖北工学院学报》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103557971A (en) * | 2013-11-05 | 2014-02-05 | 中国航空工业集团公司西安飞机设计研究所 | Measuring method of structural residual stress |
| CN103557971B (en) * | 2013-11-05 | 2015-08-26 | 中国航空工业集团公司西安飞机设计研究所 | A kind of measuring method of structure unrelieved stress |
| CN103808438A (en) * | 2014-01-16 | 2014-05-21 | 浙江工业大学 | Method for measuring sheet welding residual stress |
| CN107407606A (en) * | 2015-03-05 | 2017-11-28 | 株式会社神户制钢所 | Residual stress estimates method and residual stress estimating device |
| CN107407606B (en) * | 2015-03-05 | 2020-09-22 | 株式会社神户制钢所 | Residual stress estimation method and residual stress estimation device |
| CN106769286A (en) * | 2016-11-29 | 2017-05-31 | 中国科学院金属研究所 | A kind of preparation method and application of tabular welded unit fatigue testing specimen |
| CN106769286B (en) * | 2016-11-29 | 2019-03-12 | 中国科学院金属研究所 | A kind of preparation method and application of plate welded unit fatigue testing specimen |
| CN108548624A (en) * | 2018-04-12 | 2018-09-18 | 海信（山东）空调有限公司 | Residual stress test method for compressor piping |
| CN113237583A (en) * | 2021-05-13 | 2021-08-10 | 中南大学 | Method for evaluating and predicting residual stress of magnesium alloy cylindrical part |
| CN113237583B (en) * | 2021-05-13 | 2022-03-15 | 中南大学 | Method for evaluating and predicting residual stress of magnesium alloy cylindrical part |
| CN113883992A (en) * | 2021-12-06 | 2022-01-04 | 上交(徐州)新材料研究院有限公司 | In-plane welding deformation measuring method |
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Application publication date: 20130109 |