CN109991249A - The space-location method of crackle in T junction weldment - Google Patents
The space-location method of crackle in T junction weldment Download PDFInfo
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- CN109991249A CN109991249A CN201910292669.5A CN201910292669A CN109991249A CN 109991249 A CN109991249 A CN 109991249A CN 201910292669 A CN201910292669 A CN 201910292669A CN 109991249 A CN109991249 A CN 109991249A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/044—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using laminography or tomosynthesis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/30—Accessories, mechanical or electrical features
- G01N2223/33—Accessories, mechanical or electrical features scanning, i.e. relative motion for measurement of successive object-parts
- G01N2223/3306—Accessories, mechanical or electrical features scanning, i.e. relative motion for measurement of successive object-parts object rotates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/60—Specific applications or type of materials
- G01N2223/629—Specific applications or type of materials welds, bonds, sealing compounds
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Abstract
The invention discloses a kind of space-location methods of crackle in T junction weldment, belong to welding products test technical field.This method first rotates left and right T junction weldment, obtains the left/right rotation image of X-ray detection, according to the geometrical relationship in detection image between each section, creates the depth of T junction weldment crack defect and the mathematical model of offset calculating.Crack tip two-end-point depth in T junction weldment can be determined respectively according to above-mentioned modelh 1 、h 2 , offsetx 1 、x 2 , crackle neutral point deviation amountxAnd crackle inclination angleθ,Distribution of the crack defect along fusion length direction can be obtained by image procossing, so that the space orientation of crack defect in T junction weldment can be realized.
Description
Technical field
The present invention relates to a kind of space-location methods of weldment crackle, belong to welding products test technical field.
Background technique
Currently, the space that the present inventor has used X-ray multi-angle of view imaging method to carry out volume flaw in weldment is fixed
Position research, and the spatial position data for realizing batch volumes type defect is automatically extracted and is visualized, eliminate translation parallax method,
The problems such as operation difficulty existing for double exposure method by lead label etc. is big, and measurement error is big, and error propagation is also big.Crackle category
It is defect common in welding point in area-type defect, has extreme influence to important welded safety.
But the space orientation research of crackle homalographic type defect in weldment is carried out still using detection method of X-ray both at home and abroad
It does not have been reported that, because the invention one kind is not by the space-location method of crackle in the T junction weldment (see figure 1) of mark point, and
And then promote and apply to common welding point, there is particularly important theoretical value and practical significance, future in engineering applications is wide.
Summary of the invention
Place in order to overcome the above-mentioned deficiencies of the prior art, the present invention provide a kind of space of crackle in T junction weldment
Localization method, the space orientation for realizing crackle in T junction weldment that can be relatively simple, positioning accuracy is high, adaptable, has
Preferable future in engineering applications.
The present invention is achieved through the following technical solutions: the space-location method of crackle in a kind of T junction weldment, this
Method is able to achieve the space orientation of crackle in T junction weldment, includes the following steps:
1) T junction weldment is rotated left and right, obtains the left rotation and right rotation image of X-ray detection；
2) by the geometrical relationship creation crack tip two-end-point depth and offset between each section in the left/right rotation image of detection
Mathematical model；
3) crack tip two-end-point depth in T junction weldment is determined according to above-mentioned model respectivelyh 1 、h 2 , offsetx 1 、x 2 , split
Line neutral point deviation amountxAnd crackle inclination angleθ；
4) finally, distribution of the crack defect along fusion length direction is obtained by image procossing, crackle in T junction weldment is realized
The space orientation of defect.
Further, in the step 2, choosing X-ray and penetrating weldment thinnest part is location feature point, creates the crackle
The mathematical model of tip two-end-point depth and offset.
Further, in the step 2, the mathematical model that crack tip two-end-point offset calculates is as follows:
The mathematical model that crackle neutral point deviation amount calculates is as follows:
WhenxWhen > 0, crackle midpoint is located at the right side of T junction web center line；WhenxWhen=0, crackle midpoint is located at T junction abdomen
On plate center line；WhenxWhen < 0, crackle midpoint is located at the left side of T junction web center line；
The mathematical model of crack tip two-end-point depth calculation is as follows:
In formulah 1 、h 2 Crack tip two-end-point A in-T junction weldment1、A 2 Depth, i.e., split by what formula was calculated
Distance (mm) of the line tip two-end-point to T junction weldment wing plate lower surface；
x 1 、x 2 —Crack tip two-end-point A in T junction weldment1、A2To the distance of web center line, i.e. crack tip two-end-point
Offset (mm)；
x—Crackle midpoint is to the distance of web center line, the i.e. offset at crackle midpoint in T junction weldment；
d l1 、d l2 Crack tip two-end-point A when-T junction weldment is turned right1、A2To X-ray penetrate the projection of weldment thinnest part away from
From (mm)；
d r1 ,d r2 Crack tip two-end-point A when-T junction weldment turns left1、A2To X-ray penetrate the projection of weldment thinnest part away from
From (mm)；
αThe angle that-T junction weldment rotates left and right；
W- T junction weldment web width (mm)；
θ- crackle two end point connecting line and horizontal angle.
Further, whenx=At 45 °, the mathematical model that crack tip two-end-point offset calculates is as follows:
Whenx=At 45 °, the mathematical model of crack tip two-end-point depth calculation is as follows:
。
Further, if, then also need to calculate crackle inclination angle；
If, then inclination angleIn horizontal top；
Conversely, if, then inclination angleIn horizontal lower section；
Crack tip two end point connecting line and horizontal inclination angleθComputation model is as follows:
。
Further, it in the step 2, measures determine T junction weldment midfield board width in advanceW, wing plate thicknessδ,d l1 、d l2 、d r1 、d r2 By to carrying out automatically extracting acquisition after detection image defect Segmentation.
As a kind of application of the invention, the space-location method of crackle can also be applied to T shape in the T junction weldment
The space orientation of area-type defect in casting or forging forming part.
The beneficial effects of the present invention are: can be realized using the space-location method of crackle in T junction weldment of the present invention to T
Crack defect in shape connector weldment carries out space orientation, it is suitable in the connector other area-type defects space
Positioning.Operation of the present invention is easy, and positioning accuracy is high, adaptable, using wide, may extend to area-type in other welding points and lacks
Sunken space orientation, can also be applied to the space orientation of area-type defect in the drip moldings such as T shaped cast part and forging, before engineer application
Scape is wide.
Detailed description of the invention
Below according to drawings and examples, the present invention is further described.
Fig. 1 T junction weldment schematic diagram；
Crack tip two-end-point A in Fig. 2 T junction weldment1、A2The mathematical model of depth calculation；
Crack tip two-end-point A in Fig. 3 T junction weldment1、A2The mathematical model that offset calculates；
Fig. 4 weldment crackle inclination angle model.
In figure, 1, web, 2, wing plate, 3, weld seam, 4, crackle, 5, X-ray incident direction.
Specific embodiment
Below with reference to embodiment, the present invention is further described.
The space-location method of crackle, this method are able to achieve the sky of crackle in T junction weldment in a kind of T junction weldment
Between position, include the following steps:
1) T junction weldment is rotated left and right, obtains the left rotation and right rotation image of X-ray detection；
2) by the geometrical relationship creation crack tip two-end-point depth and offset between each section in the left/right rotation image of detection
Mathematical model；
3) crack tip two-end-point depth in T junction weldment is determined according to above-mentioned model respectivelyh 1 、h 2 , offsetx 1 、x 2 , split
Line neutral point deviation amountxAnd crackle inclination angleθ；
4) finally, distribution of the crack defect along fusion length direction is obtained by image procossing, crackle in T junction weldment is realized
The space orientation of defect.
Further, in the step 2, choosing X-ray and penetrating weldment thinnest part is location feature point, creates the crackle
The mathematical model of tip two-end-point depth and offset.
Further, in the step 2, as shown in figure 3, the mathematical model that crack tip two-end-point offset calculates is as follows:
The mathematical model that crackle neutral point deviation amount calculates is as follows:
WhenxWhen > 0, crackle midpoint is located at the right side of T junction web center line；WhenxWhen=0, crackle midpoint is located at T junction abdomen
On plate center line；WhenxWhen < 0, crackle midpoint is located at the left side of T junction web center line；
As indicated with 2, the mathematical model of crack tip two-end-point depth calculation is as follows:
In formulah 1 、h 2 Crack tip two-end-point A in-T junction weldment1、A 2 Depth, i.e., split by what formula was calculated
Distance (mm) of the line tip two-end-point to T junction weldment wing plate lower surface；
x 1 、x 2 —Crack tip two-end-point A in T junction weldment1、A2To the distance of web center line, i.e. crack tip two-end-point
Offset (mm)；
x—Crackle midpoint is to the distance of web center line, the i.e. offset at crackle midpoint in T junction weldment；
d l1 、d l2 Crack tip two-end-point A when-T junction weldment is turned right1、A2To X-ray penetrate the projection of weldment thinnest part away from
From (mm)；
d r1 ,d r2 Crack tip two-end-point A when-T junction weldment turns left1、A2To X-ray penetrate the projection of weldment thinnest part away from
From (mm)；
αThe angle that-T junction weldment rotates left and right；
W- T junction weldment web width (mm)；
θ- crackle two end point connecting line and horizontal angle.
Further, whenx=At 45 °, the mathematical model that crack tip two-end-point offset calculates is as follows:
Whenx=At 45 °, the mathematical model of crack tip two-end-point depth calculation is as follows:
。
Further, if, then also need to calculate crackle inclination angle；
As shown in figure 4, if, then inclination angleIn horizontal top；
Conversely, if, then inclination angleIn horizontal lower section；
Crack tip two end point connecting line and horizontal inclination angleθComputation model is as follows:
。
Further, it in the step 2, measures determine T junction weldment midfield board width in advanceW, wing plate thicknessδ,d l1 、d l2 、d r1 、d r2 By to carrying out automatically extracting acquisition after detection image defect Segmentation.
As a kind of application of the invention, the space-location method of crackle can also be applied to T shape in the T junction weldment
The space orientation of area-type defect in casting or forging forming part.
The space-location method of crack defect in a kind of T junction weldment proposed by the present invention.This method first connects T shape
Head weldment is rotated left and right, and the left/right rotation image of X-ray detection is obtained, and is closed according to the geometry in detection image between each section
System, the mathematical model that the depth and offset for creating T junction weldment crack defect calculate.It can be true respectively according to above-mentioned model
Determine crack tip two-end-point depth in T junction weldmenth 1 、h 2 , offsetx 1 、x 2 , crackle neutral point deviation amountxAnd crackle inclines
Angleθ(determining T junction weldment midfield board width can be wherein measured in advanceW, wing plate thicknessδ,d l1 、d l2 、d r1 、d r2 Can by pair
Carry out automatically extracting acquisition after detection image defect Segmentation), crack defect along the distribution in fusion length direction can be by image at
Reason obtains, so that the space orientation of crack defect in T junction weldment can be realized.
It can be realized using the space-location method of crackle in the T junction weldment of invention to the crackle in T junction weldment
Defect carries out space orientation, and the present invention also may extend to the space orientation of area-type defect in other welding points, can also apply
The space orientation of area-type defect, future in engineering applications are wide in the drip moldings such as T shaped cast part and forging.
Claims (7)
1. the space-location method of crackle in a kind of T junction weldment, it is characterised in that:
This method is able to achieve the space orientation of crackle in T junction weldment, includes the following steps:
1) T junction weldment is rotated left and right, obtains the left rotation and right rotation image of X-ray detection；
2) by the geometrical relationship creation crack tip two-end-point depth and offset between each section in the left/right rotation image of detection
Mathematical model；
3) crack tip two-end-point depth in T junction weldment is determined according to above-mentioned model respectivelyh 1 、h 2 , offsetx 1 、x 2 , crackle
Neutral point deviation amountxAnd crackle inclination angleθ；
4) finally, distribution of the crack defect along fusion length direction is obtained by image procossing, crackle in T junction weldment is realized
The space orientation of defect.
2. the space-location method of crackle in T junction weldment according to claim 1, it is characterised in that: the step
2) in, choosing X-ray and penetrating weldment thinnest part is location feature point, creates the crack tip two-end-point depth and offset
Mathematical model.
3. the space-location method of crackle in T junction weldment according to claim 1 or 2, it is characterised in that: the step
It is rapid 2) in, crack tip two-end-point offset calculate mathematical model it is as follows:
The mathematical model that crackle neutral point deviation amount calculates is as follows:
WhenxWhen > 0, crackle midpoint is located at the right side of T junction web center line；WhenxWhen=0, crackle midpoint is located at T junction abdomen
On plate center line；WhenxWhen < 0, crackle midpoint is located at the left side of T junction web center line；
The mathematical model of crack tip two-end-point depth calculation is as follows:
In formulah 1 、h 2 Crack tip two-end-point A in-T junction weldment1、A 2 Depth, i.e., the crackle being calculated by formula
Distance (mm) of the tip two-end-point to T junction weldment wing plate lower surface；
x 1 、x 2 —Crack tip two-end-point A in T junction weldment1、A2To the distance of web center line, i.e. crack tip two-end-point
Offset (mm)；
x—Crackle midpoint is to the distance of web center line, the i.e. offset at crackle midpoint in T junction weldment；
d l1 、d l2 Crack tip two-end-point A when-T junction weldment is turned right1、A2To X-ray penetrate the projection of weldment thinnest part away from
From (mm)；
d r1 ,d r2 Crack tip two-end-point A when-T junction weldment turns left1、A2To X-ray penetrate the projection of weldment thinnest part away from
From (mm)；
αThe angle that-T junction weldment rotates left and right；
W- T junction weldment web width (mm)；
θ- crackle two end point connecting line and horizontal angle.
4. the space-location method of crackle in T junction weldment according to claim 3, it is characterised in that: whenx=45°
When, the mathematical model that crack tip two-end-point offset calculates is as follows:
Whenx=At 45 °, the mathematical model of crack tip two-end-point depth calculation is as follows:
。
5. the space-location method of crackle in T junction weldment according to claim 3 or 4, it is characterised in that: if, then also need to calculate crackle inclination angle；
If, then inclination angleIn horizontal top；
Conversely, if, then inclination angleIn horizontal lower section；
Crack tip two end point connecting line and horizontal inclination angleθComputation model is as follows:
。
6. according to right want 1 described in T junction weldment crackle space-location method, it is characterised in that: the step 2
In, it measures determine T junction weldment midfield board width in advanceW, wing plate thicknessδ,d l1 、d l2 、d r1 、d r2 By being lacked to detection image
It carries out automatically extracting acquisition after falling into segmentation.
7. according to right want 1 described in T junction weldment crackle space-location method, it is characterised in that: the T junction
The space-location method of crackle is applied to the space orientation of area-type defect in T shaped cast part or forging forming part in weldment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910292669.5A CN109991249A (en) | 2019-04-12 | 2019-04-12 | The space-location method of crackle in T junction weldment |
| NL2024691A NL2024691B1 (en) | 2019-04-12 | 2020-01-17 | Method for spatially positioning crack in t-joint weldment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910292669.5A CN109991249A (en) | 2019-04-12 | 2019-04-12 | The space-location method of crackle in T junction weldment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483151A (en) * | 2016-10-14 | 2017-03-08 | 徐州工程学院 | Unilateral projection registration fault automatic distinguishing method in T-shaped weldment left/right rotation image |
| CN107561097A (en) * | 2017-09-07 | 2018-01-09 | 荆门创佳机械科技有限公司 | A kind of measuring method of crack depth of concrete |
| CN109060961A (en) * | 2018-08-01 | 2018-12-21 | 大连理工大学 | The accurate quantitative approach of posted sides pipeline Incline Crack based on TOFD circumferential direction scanning image |
| NL2024691A (en) * | 2019-04-12 | 2020-05-06 | Xuzhou Inst Technology | Method for spatially positioning crack in t-joint weldment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896586A (en) * | 2018-07-20 | 2018-11-27 | 徐州工程学院 | The space-location method of defect and banjo fixing butt jointing weldment in banjo fixing butt jointing weldment |
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2019
- 2019-04-12 CN CN201910292669.5A patent/CN109991249A/en active Pending
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- 2020-01-17 NL NL2024691A patent/NL2024691B1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483151A (en) * | 2016-10-14 | 2017-03-08 | 徐州工程学院 | Unilateral projection registration fault automatic distinguishing method in T-shaped weldment left/right rotation image |
| CN107561097A (en) * | 2017-09-07 | 2018-01-09 | 荆门创佳机械科技有限公司 | A kind of measuring method of crack depth of concrete |
| CN109060961A (en) * | 2018-08-01 | 2018-12-21 | 大连理工大学 | The accurate quantitative approach of posted sides pipeline Incline Crack based on TOFD circumferential direction scanning image |
| NL2024691A (en) * | 2019-04-12 | 2020-05-06 | Xuzhou Inst Technology | Method for spatially positioning crack in t-joint weldment |
Non-Patent Citations (2)
| Title |
|---|
| 梁德群 等: "基于知识的X光焊缝缺陷三维信息提取 ", 《中国图象图形学报》 * |
| 石端虎: "复杂结构精密焊件中缺陷分割及空间定位的研究", 《中国博士学位论文全文数据库 信息科技辑》 * |
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| NL2024691B1 (en) | 2021-04-21 |
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