CN104897320A - Method for measuring welding residual stress - Google Patents
Method for measuring welding residual stress Download PDFInfo
- Publication number
- CN104897320A CN104897320A CN201510332110.2A CN201510332110A CN104897320A CN 104897320 A CN104897320 A CN 104897320A CN 201510332110 A CN201510332110 A CN 201510332110A CN 104897320 A CN104897320 A CN 104897320A
- Authority
- CN
- China
- Prior art keywords
- foil gauge
- welding
- weld seam
- foil
- residual stress
- 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
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a method for measuring welding residual stress and relates to the technical field of welding. The method comprises the following steps of: selecting a welding line and a long strip-shaped area on the top surface of a plate subjected to butt welding as a part to be measured of the plate and polishing the part to be measured until the surface of the part to be measured is smooth, wherein the long strip-shaped area is on a side of the welding line and vertical the welding line; pasting foil gauges on at least 5 measuring points selected on the part to be measured on the welding line and the part to be measured on the long strip-shaped area, wherein the foil gages on the welding line are arranged at equal intervals and the foil gages in the long strip-shaped area are gradually dense towards the direction of the welding direction; after the leads of the foil gages and the wire of a strain gage are welded, zeroing the strain gage and checking the change of the resistance values of the foil gages; drilling blind holes on the centers of the foil gages by using a drilling tool, wherein the diameters of the blind holes are from 1.5 to 2mm and the depths of the blind holes are from 2 to 2.5mm; and recording the residual stress data. Compared with a method in the prior art, the method in the invention is accurate in measurement, convenient in operation, and low in cost.
Description
Technical field
The present invention relates to welding technology field, especially a kind of measuring method of welding residual stress.
Background technology
Welding residual stress is after welding terminates, and remain in the stress in cooling weldment, this unrelieved stress is the stress being present in weldment inside with equilibrium state, and its generation causes because weld heating produces uneven temperature field.Welding residual stress is prevalent in welded structure, and the rigidity of its butt-welding fitting, intensity, dimensional stability, stress corrosion crack all have considerable influence.The distribution of the welding residual stress on weldment is very complicated, Measuring Welding Residual Stresses, to guaranteeing that the safety and reliability of workpiece has very important meaning.The measuring method of existing unrelieved stress includes the mechanical measurement method of damage and undamaged physical measurement method, but existing mechanical measuring means exists measures inaccurate problem.
Summary of the invention
The object of this invention is to provide a kind of measuring method of welding residual stress, there is the inaccurate problem of measurement in the mechanical measuring means that this method can solve existing welding residual stress.
In order to solve the problem, the technical solution used in the present invention is: the measuring method of this welding residual stress comprises the following steps:
A, dull and stereotyped upper surface in jam welding, choose weld seam and be positioned at weld seam side and perpendicular to the stripe region of weld seam as the detected part of pieces of cloth, with sand paper by detected part polishing to surface-brightening;
B, all select at least 5 measuring points to paste foil gauges, the foil gauge equidistant placement on weld seam in the detected part of weld seam and the detected part of described stripe region, the foil gauge in described stripe region is intensive gradually towards bead direction;
C, by after fixing with strainmeter wire bonds for foil gauge lead-in wire, strainmeter returned to zero, checks foil gauge change in resistance situation with multimeter;
D, get blind hole with drilling tool at foil gauge center, blind hole diameter is 1.5 ~ 2mm, and blind hole depth is 2 ~ 2.5mm;
E, record unrelieved stress data.
In the technical scheme of the measuring method of above-mentioned welding residual stress, technical scheme can also be more specifically: in step B, and the spacing of pasting foil gauge is in welded joints 25mm, and the spacing of the foil gauge in described stripe region is 15 ~ 30mm.
Owing to have employed technique scheme, the present invention compared with prior art has following beneficial effect: measure accurately, easy to operate, cost is low.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1
The measuring method of the welding residual stress of the present embodiment comprises the following steps:
A, dull and stereotyped upper surface in jam welding, choose weld seam and be positioned at weld seam side and perpendicular to the stripe region of weld seam as the detected part of pieces of cloth, with sand paper by detected part polishing to surface-brightening;
B, all select 5 measuring points to paste foil gauges, the foil gauge equidistant placement on weld seam in the detected part of weld seam and the detected part of described stripe region, the foil gauge in described stripe region is intensive gradually towards bead direction; The spacing of pasting foil gauge is in welded joints 25mm, and the spacing of the foil gauge in described stripe region is outwards followed successively by 15mm, 15mm, 20mm, 25mm from weld seam;
C, by after fixing with strainmeter wire bonds for foil gauge lead-in wire, strainmeter returned to zero, checks foil gauge change in resistance situation with multimeter;
D, get blind hole with drilling tool at foil gauge center, blind hole diameter is 1.5mm, and blind hole depth is 2mm;
E, record unrelieved stress data.
Embodiment 2
A, dull and stereotyped upper surface in jam welding, choose weld seam and be positioned at weld seam side and perpendicular to the stripe region of weld seam as the detected part of pieces of cloth, with sand paper by detected part polishing to surface-brightening;
B, all select 6 measuring points to paste foil gauges, the foil gauge equidistant placement on weld seam in the detected part of weld seam and the detected part of described stripe region, the foil gauge in described stripe region is intensive gradually towards bead direction; The spacing of pasting foil gauge is in welded joints 25mm, and the spacing of the foil gauge in described stripe region is outwards followed successively by 15mm, 15mm, 20mm, 25mm, 30mm from weld seam;
C, by after fixing with strainmeter wire bonds for foil gauge lead-in wire, strainmeter returned to zero, checks foil gauge change in resistance situation with multimeter;
D, get blind hole with drilling tool at foil gauge center, blind hole diameter is 2mm, and blind hole depth is 2.5mm;
E, record unrelieved stress data.
Claims (2)
1. a measuring method for welding residual stress, is characterized in that comprising the following steps:
A, dull and stereotyped upper surface in jam welding, choose weld seam and be positioned at weld seam side and perpendicular to the stripe region of weld seam as the detected part of pieces of cloth, with sand paper by detected part polishing to surface-brightening;
B, all select at least 5 measuring points to paste foil gauges, the foil gauge equidistant placement on weld seam in the detected part of weld seam and the detected part of described stripe region, the foil gauge in described stripe region is intensive gradually towards bead direction;
C, by after fixing with strainmeter wire bonds for foil gauge lead-in wire, strainmeter returned to zero, checks foil gauge change in resistance situation with multimeter;
D, get blind hole with drilling tool at foil gauge center, blind hole diameter is 1.5 ~ 2mm, and blind hole depth is 2 ~ 2.5mm;
E, record unrelieved stress data.
2. the measuring method of welding residual stress according to claim 1, is characterized in that: in step B, and the spacing of pasting foil gauge is in welded joints 25mm, and the spacing of the foil gauge in described stripe region is 15 ~ 30mm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510332110.2A CN104897320A (en) | 2015-06-16 | 2015-06-16 | Method for measuring welding residual stress |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510332110.2A CN104897320A (en) | 2015-06-16 | 2015-06-16 | Method for measuring welding residual stress |
Publications (1)
Publication Number | Publication Date |
---|---|
CN104897320A true CN104897320A (en) | 2015-09-09 |
Family
ID=54030126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201510332110.2A Pending CN104897320A (en) | 2015-06-16 | 2015-06-16 | Method for measuring welding residual stress |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN104897320A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105203625A (en) * | 2015-09-11 | 2015-12-30 | 中国特种设备检测研究院 | Magnetic evaluation method for residual stress relieving effect in postweld heat treatment |
CN107009041A (en) * | 2017-03-22 | 2017-08-04 | 山西汾西重工有限责任公司 | The flat welding process of extra super duralumin alloy circular cylindrical shell and rust-preventing aluminum alloy circular cylindrical shell |
CN107991457A (en) * | 2018-01-24 | 2018-05-04 | 天津职业技术师范大学 | A kind of method predicted based on structural transformation welding residual stress and control device |
CN109307568A (en) * | 2018-11-16 | 2019-02-05 | 北京理工大学 | The lossless detection method of welding residual stress and the probe for using this method |
CN110625211A (en) * | 2019-08-13 | 2019-12-31 | 桂林电子科技大学 | System and method for measuring cooling stress of welding spot after reflow soldering |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57175233A (en) * | 1981-04-21 | 1982-10-28 | Toshiba Corp | Measuring method of residual stress |
CN101900615A (en) * | 2009-05-27 | 2010-12-01 | 中国石油天然气集团公司 | Blind hole measurement method for value and distribution of residual stress of thick-wall and large-diameter welded steel pipe |
CN102853952A (en) * | 2012-09-18 | 2013-01-02 | 哈尔滨电机厂有限责任公司 | Method for testing welding residual stress of mixed-flow turning wheel |
CN103808438A (en) * | 2014-01-16 | 2014-05-21 | 浙江工业大学 | Method for measuring sheet welding residual stress |
CN104296901A (en) * | 2014-11-04 | 2015-01-21 | 苏州精创光学仪器有限公司 | Welding residual stress small hole measuring method |
-
2015
- 2015-06-16 CN CN201510332110.2A patent/CN104897320A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57175233A (en) * | 1981-04-21 | 1982-10-28 | Toshiba Corp | Measuring method of residual stress |
CN101900615A (en) * | 2009-05-27 | 2010-12-01 | 中国石油天然气集团公司 | Blind hole measurement method for value and distribution of residual stress of thick-wall and large-diameter welded steel pipe |
CN102853952A (en) * | 2012-09-18 | 2013-01-02 | 哈尔滨电机厂有限责任公司 | Method for testing welding residual stress of mixed-flow turning wheel |
CN103808438A (en) * | 2014-01-16 | 2014-05-21 | 浙江工业大学 | Method for measuring sheet welding residual stress |
CN104296901A (en) * | 2014-11-04 | 2015-01-21 | 苏州精创光学仪器有限公司 | Welding residual stress small hole measuring method |
Non-Patent Citations (1)
Title |
---|
刘柏梁 等: "钻孔法测定焊接残余应力时的塑性释放应变", 《大连铁道学院学报》 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105203625A (en) * | 2015-09-11 | 2015-12-30 | 中国特种设备检测研究院 | Magnetic evaluation method for residual stress relieving effect in postweld heat treatment |
CN105203625B (en) * | 2015-09-11 | 2018-12-04 | 中国特种设备检测研究院 | The magnetic evaluation method of post weld heat treatment elimination residual stress effect |
CN107009041A (en) * | 2017-03-22 | 2017-08-04 | 山西汾西重工有限责任公司 | The flat welding process of extra super duralumin alloy circular cylindrical shell and rust-preventing aluminum alloy circular cylindrical shell |
CN107991457A (en) * | 2018-01-24 | 2018-05-04 | 天津职业技术师范大学 | A kind of method predicted based on structural transformation welding residual stress and control device |
CN109307568A (en) * | 2018-11-16 | 2019-02-05 | 北京理工大学 | The lossless detection method of welding residual stress and the probe for using this method |
CN110625211A (en) * | 2019-08-13 | 2019-12-31 | 桂林电子科技大学 | System and method for measuring cooling stress of welding spot after reflow soldering |
CN110625211B (en) * | 2019-08-13 | 2021-09-10 | 桂林电子科技大学 | System and method for measuring cooling stress of welding spot after reflow soldering |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104897320A (en) | Method for measuring welding residual stress | |
CN103808438B (en) | A kind of measuring method of plate sheet welding residual stress | |
CN204479047U (en) | A kind of positioning bogie fixture measures bracing or strutting arrangement | |
CN205691091U (en) | A kind of clamp structure for measuring Helicopter Main blade torsional angle | |
CN202630873U (en) | Gap pass-stop gauge | |
CN106546176A (en) | A kind of rail outward appearance physical dimension and surface defect detection apparatus | |
CN203785579U (en) | Automobile back floor reinforcement beam assembly tester | |
CN206399353U (en) | A kind of weld seam camber measuring scale | |
CN104476142B (en) | Slipway beam anti-deformation manufacture craft | |
CN202582515U (en) | Steel-rail welding-seam aligning detection apparatus for steel-rail action edge mounted outside | |
CN104596684A (en) | Transverse residual stress detection method for steel rail | |
CN205066720U (en) | Bead -on -plate weld thickness detection device | |
KR100758028B1 (en) | A method for correcting hight of electrode welder for CCFL and device thereof | |
CN207248055U (en) | A kind of tire sidewall positive closure width measure cubing | |
CN110398511B (en) | Welding thermal cycle curve tester | |
KR102008704B1 (en) | Welding material thickness measuring device and welding method using the same | |
CN201752825U (en) | Detector used for assembling and welding of tanks of torpedo cars | |
CN107101762B (en) | A kind of measurement method of round tube inner wall welding residual stress | |
CN206113909U (en) | Test block of gear welding detection | |
CN213812046U (en) | Measuring gauge for detecting oil seal distance of automobile axle | |
CN212779042U (en) | Detection tool for welding line distance | |
CN104215142A (en) | Welded joint position and width detection tool | |
CN206406040U (en) | Rail line drawing ruler | |
CN202177364U (en) | Integral testing scale for skirting board of equipment cabin of motor train unit | |
CN209978786U (en) | Tool for detecting inner arc radius of riding bolt |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150909 |
|
WD01 | Invention patent application deemed withdrawn after publication |