CN101900651A - Method for measuring forward tensile strength of welding spots and fixtures - Google Patents
Method for measuring forward tensile strength of welding spots and fixtures Download PDFInfo
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- CN101900651A CN101900651A CN 201010219071 CN201010219071A CN101900651A CN 101900651 A CN101900651 A CN 101900651A CN 201010219071 CN201010219071 CN 201010219071 CN 201010219071 A CN201010219071 A CN 201010219071A CN 101900651 A CN101900651 A CN 101900651A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000003466 welding Methods 0.000 title claims abstract description 34
- 238000012360 testing method Methods 0.000 claims abstract description 77
- 238000013211 curve analysis Methods 0.000 claims abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 20
- 229910000679 solder Inorganic materials 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 13
- 238000005553 drilling Methods 0.000 abstract 2
- 238000004080 punching Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a method for accurately measuring forward tensile strength of welding spots and fixtures which are not limited by mouldability of a material. The method comprises the following steps: firstly drilling through holes of the same position and size on two test boards, wherein the through holes are uniformly distributed on one circumference and comprise first through holes with larger bore diameter and second through holes with smaller bore diameter, and the first through holes and the second through holes have equal number and alternately arranged; selecting two fixtures, and drilling through holes with the same position and size as those of the test boards on mounting surfaces of the two fixtures; stacking the two test boards together for spot welding to form the welding spots at the center of the circumference of the first through holes and the second first through holes, and respectively fixing the fixtures with the test boards at the same side by bolts and nuts; and finally stretching the two fixtures at a certain stretching speed until the welding spots of the test boards are ruptured, recording experimental data and carrying out tensile load-displacement curve analysis.
Description
Technical field
The invention belongs to the welding technical field of measurement and test, specially refer to a kind of method and anchor clamps of measuring forward tensile strength of welding spots.
Background technology
Spot welding has light weight, static strength height, good reliability, stable performance and advantage such as easily is automated, and generally has been adopted as the structure method of attachment by the Hyundai Motor vehicle body, and in general, the pad of the coachbuilt body more than 90% all can adopt spot welding.Thereby the vehicle body solder joint failure causes the solder joint cracking mainly due to the effect of resultant force, and therefore safe and reliable for guaranteeing body structure, the extreme value power that the consideration solder joint can bear becomes the emphasis of present research.
The research of spot welding stretching test method is fewer at present, the U.S. is at " welding spot structure analytical approach " (application number: US6186011 B1) in the patent sheet material of testing is cut into definite shape of calendar year 2001 application, through diel its shape is washed into or is bent into square box shape again, adopt melting to weld in its stile corner of digging then, and each bottom center to box-like sample spoted weld together, then the anchor clamps that process are inserted in the square box and tighten with fastening bolt, at last sample is put on the cupping machine and stretches, till sample spot welding place fracture.The distortion that this method can overcome stretching surface, solder joint place substantially is not the defective of homogeneous deformation, but this method has a defective clearly: it mainly is, mouldability lower at an intensity material preferably, that is to say in this patent that test panels square box shape realizes by punching press, this need mouldability preferably material could realize.But automobile has generally adopted the steel of plow-steel and superhigh intensity to realize light-weighted purpose at present, and the mouldability of these materials is relatively poor, needs could realize moulding by special processing.If directly punching press can't realize the square box shape, can bring greatly difficulty to test, testing expenses also can improve greatly.Be badly in need of at present current test method is improved sex exploration and research, to reduce to of the influence of the mouldability of material own to test.
Summary of the invention
First purpose of the present invention is to propose a kind of mouldability of material that is not subjected to own to limit, and can measure the method for forward tensile strength of welding spots exactly.
The method of measurement forward tensile strength of welding spots of the present invention comprises the steps:
A: on two test panels, get out position and all identical through hole of size respectively, wherein the through hole on every test panels is distributed on the circumference equably, described through hole comprises the second less through hole of first through hole and aperture that the aperture is bigger, and the number of first through hole and second through hole equates and is spaced;
B: make two anchor clamps, described anchor clamps have and testing table stretching end bare terminal end that is connected and the installed surface that is connected with test panels, wherein are drilled with on the installed surface and test panels position and the equal consistent through hole of size;
C: two test panels are stacked together, and first through hole of a test panels wherein and second through hole of another piece test panels are kept with one heart, then two test panels are carried out spot-welded on, solder joint is at the circle centre position of first through hole and the second through hole place circumference;
D: utilize bolt and nut respectively the anchor clamps and the test panels of homonymy to be fixed together;
E: the bare terminal end with two anchor clamps is fixed on two ends that stretch of cupping machine respectively, slowly load with certain draw speed then, be stretched to till the solder joint place fracture of test panels, the record test figure is also carried out tensile load---the displacement curve analysis.
In above-mentioned measuring method, need not carry out punching press to test panels, only need on test panels, hole and can realize the fixing of sheet material and anchor clamps, thereby carry out tension test, therefore not limited by the mouldability of material own.The number of first through hole and second through hole equates and is spaced to make test panels suffered pulling force when stretching identical and even.
In the D step with test panels and anchor clamps fixedly the time, bolt and nut dual mode is installed: 1, the less through hole in aperture of first through hole of the bigger through hole in the aperture of screw bolt passes anchor clamps installed surface, test panels and second through hole, anchor clamps installed surface, then with nut and bolt, the diameter of the nuts of bolt is less than the aperture of first through hole at this moment, and the diameter of nuts and nut is greater than the aperture of second through hole; 2, nut is positioned in first through hole of test panels, then that the aperture of screw bolt passes anchor clamps installed surface is less through hole, second through hole and first through hole of test panels, then with nut and bolt, the diameter of nut is less than the aperture of first through hole at this moment, and the diameter of nuts and nut is greater than the aperture of second through hole.
Described two test panels are preferably the identical circle of size, to guarantee that test panels can homogeneous deformation in drawing process.
In the described A step, preferably at first two test panels are stacked together, and then hole, because the lead to the hole site of two test panels and size are all identical, therefore boring helps raising speed like this.
Described test panels requires smooth and thickness is even, with the accuracy of guaranteeing to test.
Second purpose of the present invention is to propose applied anchor clamps in the method for above-mentioned measurement forward tensile strength of welding spots, these anchor clamps have installed surface and bare terminal end, key is to be drilled with a plurality of through holes that are positioned on the same circumference on the installed surface of described anchor clamps, described through hole comprises the less small through hole of large through-hole and aperture that the aperture is bigger, and the number of large through-hole and small through hole equates and is spaced.
The center of circle of the through hole place circumference of the center of the bare terminal end of above-mentioned anchor clamps on the projection on the anchor clamps installed surface and installed surface overlaps, with the center of the bond pad locations of warranty test sheet material and anchor clamps on same straight line.
The bare terminal end of above-mentioned anchor clamps is threaded or anti-skid design, is beneficial to the bare terminal end of anchor clamps and the stretching end of cupping machine and fixes.
The method of measurement forward tensile strength of welding spots of the present invention need not be carried out punching press to test panels, only need on test panels, hole and to realize the fixing of sheet material and anchor clamps, therefore overcome sheet metal component mouldability loaded down with trivial details property and the expense unfavorable and processing sample that test is preceding and crossed high unfavorable factor, made solder joint be in uniform forward extended state.This measuring method is simple and easy to do, and is workable, measures accurately.
Description of drawings
Fig. 1 is the front elevation of test panels of the method for measurement forward tensile strength of welding spots of the present invention;
Fig. 2 is the front elevation of anchor clamps of the method for measurement forward tensile strength of welding spots of the present invention;
Fig. 3 is the side view of anchor clamps of the method for measurement forward tensile strength of welding spots of the present invention;
Fig. 4 is the principle schematic of the method for measurement forward tensile strength of welding spots of the present invention;
Fig. 5 is the instrumentation plan of the method for measurement forward tensile strength of welding spots of the present invention.
Embodiment
Describe the present invention in detail below in conjunction with specific embodiments and the drawings.
Embodiment 1:
The method of the measurement forward tensile strength of welding spots of present embodiment comprises the steps:
A: as shown in Figure 1, at first that two block sizes are identical circular test panels 1 is stacked together with one heart, and then on two test panels 1, get out position and all identical eight through holes of size, wherein the through hole on every test panels 1 is distributed on the circumference equably, described through hole comprises that four bigger first through hole 11 and four less second through hole, 12, the first through holes 11 and second through holes 12 in aperture in aperture are spaced; The thickness of test panels 1 requires any surface finish smooth between 0.5-2.5mm, and is not by corrosion, smooth and thickness is even;
B: shown in Fig. 2,3, choose two anchor clamps 2 with installed surface 21 and bare terminal end 22, and on the installed surface 21 of two anchor clamps, get out respectively and the position of test panels through hole and all identical through hole 23,24 of size, wherein the aperture of through hole 23 is identical with the aperture of first through hole 11 of test panels, and the aperture of through hole 24 is identical with the aperture of second through hole 12 of test panels;
C: two test panels 1 are stacked together with one heart, and first through hole 11 of a test panels and second through hole 12 of another piece test panels are kept with one heart, then two test panels 1 are carried out spot-welded on, solder joint is at the circle centre position of first through hole 11 and second through hole, 12 place circumference;
D: shown in Fig. 4,5, bolt 3 is passed successively the less through hole 24 in aperture of first through hole 11 of the bigger through hole 23 in the aperture of anchor clamps installed surface, test panels and second through hole 12, anchor clamps installed surface, then that nut 4 is fixing with bolt 3, wherein the diameter of the nuts of bolt 3 is less than the aperture of the through hole 23 of first through hole 11 and anchor clamps installed surface, and the diameter of the nuts of bolt 3 and nut 4 is greater than the aperture of the through hole 24 of second through hole 12 and anchor clamps installed surface;
E: the bare terminal end 22 with two anchor clamps is fixed on two ends that stretch of cupping machine respectively, slowly load with certain draw speed then, be stretched to till the solder joint place fracture of test panels, load and failure site during the record fracture, image data point also carries out tensile load---the displacement curve analysis.
Shown in Fig. 2,3, applied anchor clamps 2 have installed surface 21 and bare terminal end 22 in the method for above-mentioned measurement forward tensile strength of welding spots, key is to be drilled with a plurality of through holes that are positioned on the same circumference on the installed surface 21 of described anchor clamps 2, described through hole comprises the less small through hole 24 of aperture bigger large through-hole 23 and aperture, and the number of large through-hole 23 and small through hole 24 equates and is spaced.
The center of circle of the through hole place circumference of the center of the bare terminal end 22 of anchor clamps 2 on the projection on the anchor clamps installed surface 21 and installed surface 21 overlaps, with the center of the bond pad locations of warranty test sheet material and anchor clamps on same straight line.
The bare terminal end 22 of anchor clamps 2 is threaded, and the bare terminal end 22 that is beneficial to anchor clamps is fixed with the stretching end of cupping machine.
The method of above-mentioned measurement forward tensile strength of welding spots need not be carried out punching press to test panels, only need on test panels, hole and to realize the fixing of sheet material and anchor clamps, therefore overcome sheet metal component mouldability loaded down with trivial details property and the expense unfavorable and processing sample that test is preceding and crossed high unfavorable factor, made solder joint be in uniform forward extended state.This measuring method is simple and easy to do, and is workable, measures accurately.
Claims (9)
1. a method of measuring forward tensile strength of welding spots is characterized in that comprising the steps:
A: on two test panels, get out position and all identical through hole of size respectively, wherein the through hole on every test panels is distributed on the circumference equably, described through hole comprises the second less through hole of first through hole and aperture that the aperture is bigger, and the number of first through hole and second through hole equates and is spaced;
B: make two anchor clamps, described anchor clamps have and testing table stretching end bare terminal end that is connected and the installed surface that is connected with test panels, wherein are drilled with on the installed surface and test panels position and the equal consistent through hole of size;
C: two test panels are stacked together, and first through hole of a test panels wherein and second through hole of another piece test panels are kept with one heart, then two test panels are carried out spot-welded on, solder joint is at the circle centre position of first through hole and the second through hole place circumference;
D: utilize bolt and nut respectively the anchor clamps and the test panels of homonymy to be fixed together;
E: the bare terminal end with two anchor clamps is fixed on two ends that stretch of cupping machine respectively, slowly load with certain draw speed then, be stretched to till the solder joint place fracture of test panels, the record test figure is also carried out tensile load---the displacement curve analysis.
2. the method for measurement forward tensile strength of welding spots according to claim 1, it is characterized in that in the described D step: the less through hole in aperture of the through hole that the aperture of screw bolt passes anchor clamps installed surface is bigger, first through hole of test panels and second through hole, anchor clamps installed surface, then with nut and bolt, the diameter of the nuts of bolt is less than the aperture of first through hole at this moment, and the diameter of nuts and nut is greater than the aperture of second through hole.
3. the method for measurement forward tensile strength of welding spots according to claim 1, it is characterized in that in the described D step: nut is positioned in first through hole of test panels, then that the aperture of screw bolt passes anchor clamps installed surface is less through hole, second through hole and first through hole of test panels, then with nut and bolt, the diameter of nut is less than the aperture of first through hole at this moment, and the diameter of nuts and nut is greater than the aperture of second through hole.
4. according to the method for claim 1 or 2 or 3 described measurement forward tensile strength of welding spots, it is characterized in that described two test panels are the identical circle of size.
5. according to the method for claim 1 or 2 or 3 described measurement forward tensile strength of welding spots, it is characterized in that at first two test panels being stacked together, and then holing in the described A step.
6. according to the method for claim 1 or 2 or 3 described measurement forward tensile strength of welding spots, it is characterized in that described test panels is smooth and thickness is even.
7. the anchor clamps in the method for measurement forward tensile strength of welding spots according to claim 1, have installed surface and bare terminal end, it is characterized in that being drilled with a plurality of through holes that are positioned on the same circumference on the installed surface of described anchor clamps, described through hole comprises the less small through hole of large through-hole and aperture that the aperture is bigger, and the number of large through-hole and small through hole equates and is spaced.
8. the anchor clamps in the method for measurement forward tensile strength of welding spots according to claim 7 is characterized in that the center of circle of the through hole place circumference of center on the projection on the anchor clamps installed surface and installed surface of the bare terminal end of described anchor clamps overlaps.
9. according to the anchor clamps in the method for claim 7 or 8 described measurement forward tensile strength of welding spots, it is characterized in that the bare terminal end of described anchor clamps is threaded or anti-skid design.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010219071A CN101900651B (en) | 2010-07-06 | 2010-07-06 | Method for measuring forward tensile strength of welding spots and fixtures |
| PCT/CN2011/076856 WO2012003794A1 (en) | 2010-07-06 | 2011-07-05 | Method and clamp for measuring weld spot forward tensile strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010219071A CN101900651B (en) | 2010-07-06 | 2010-07-06 | Method for measuring forward tensile strength of welding spots and fixtures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101900651A true CN101900651A (en) | 2010-12-01 |
| CN101900651B CN101900651B (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010219071A Active CN101900651B (en) | 2010-07-06 | 2010-07-06 | Method for measuring forward tensile strength of welding spots and fixtures |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101900651B (en) |
| WO (1) | WO2012003794A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012003794A1 (en) * | 2010-07-06 | 2012-01-12 | 奇瑞汽车股份有限公司 | Method and clamp for measuring weld spot forward tensile strength |
| CN102645382A (en) * | 2012-04-01 | 2012-08-22 | 郑州宇通客车股份有限公司 | Test method for measuring shear strength of welding spots and dedicated tester thereof |
| WO2013159704A1 (en) * | 2012-04-27 | 2013-10-31 | 深圳深蓝精机有限公司 | Welding detection device and automatic welding machine |
| CN105136575A (en) * | 2015-09-07 | 2015-12-09 | 江苏大学 | Welding-type superhard blade mechanical property test device and method |
| CN108871945A (en) * | 2017-05-10 | 2018-11-23 | 大族激光科技产业集团股份有限公司 | A kind of test method and fixture of plastic material sample weld strength |
| CN111855952A (en) * | 2020-07-31 | 2020-10-30 | 山西北方机械制造有限责任公司 | Method and device for rapidly testing welding performance of 35# steel |
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|---|---|---|---|---|
| AR088363A1 (en) * | 2011-10-18 | 2014-05-28 | Dow Agrosciences Llc | MATERIALS AND METHODS FOR THE DETECTION OF THE EVENT pDAB4472-1606 CONTAINING THE ARYLOXIALCANOATE DIOXYGENASE GENE (AAD-12) IN PLANTS |
| CN106289976B (en) * | 2016-08-15 | 2023-06-23 | 北京普莱德新能源电池科技有限公司 | Device for detecting BUSBAR welding spot tensile test |
| CN113092259A (en) * | 2021-04-27 | 2021-07-09 | 昆山裕莱祥电子科技有限公司 | Connecting wire solder joint tensile test device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6186011B1 (en) * | 1999-07-06 | 2001-02-13 | Ford Global Technologies, Inc. | Method of analyzing spot welded structures |
| CN1924546A (en) * | 2006-09-04 | 2007-03-07 | 北京工业大学 | Cross point welding sample multidirectional fatigue loading fixture |
| CN201355343Y (en) * | 2008-12-24 | 2009-12-02 | 中国航空工业第一集团公司北京航空制造工程研究所 | Tensile specimen for testing bonding strength of coating |
| CN101614637A (en) * | 2009-07-29 | 2009-12-30 | 奇瑞汽车股份有限公司 | A kind of device and test method of measuring tensile strength of solder joint |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4133956B2 (en) * | 2003-10-22 | 2008-08-13 | 新日本製鐵株式会社 | Method for estimating the fracture limit load of spot welds |
| JP4150383B2 (en) * | 2004-04-13 | 2008-09-17 | 新日本製鐵株式会社 | Fracture prediction apparatus, method, computer program, and computer-readable recording medium for spot welds |
| CN101900651B (en) * | 2010-07-06 | 2012-10-03 | 奇瑞汽车股份有限公司 | Method for measuring forward tensile strength of welding spots and fixtures |
-
2010
- 2010-07-06 CN CN201010219071A patent/CN101900651B/en active Active
-
2011
- 2011-07-05 WO PCT/CN2011/076856 patent/WO2012003794A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6186011B1 (en) * | 1999-07-06 | 2001-02-13 | Ford Global Technologies, Inc. | Method of analyzing spot welded structures |
| CN1924546A (en) * | 2006-09-04 | 2007-03-07 | 北京工业大学 | Cross point welding sample multidirectional fatigue loading fixture |
| CN201355343Y (en) * | 2008-12-24 | 2009-12-02 | 中国航空工业第一集团公司北京航空制造工程研究所 | Tensile specimen for testing bonding strength of coating |
| CN101614637A (en) * | 2009-07-29 | 2009-12-30 | 奇瑞汽车股份有限公司 | A kind of device and test method of measuring tensile strength of solder joint |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012003794A1 (en) * | 2010-07-06 | 2012-01-12 | 奇瑞汽车股份有限公司 | Method and clamp for measuring weld spot forward tensile strength |
| CN102645382A (en) * | 2012-04-01 | 2012-08-22 | 郑州宇通客车股份有限公司 | Test method for measuring shear strength of welding spots and dedicated tester thereof |
| CN102645382B (en) * | 2012-04-01 | 2015-11-11 | 郑州宇通客车股份有限公司 | For measuring the test method of solder joint shear resistance and special test unit thereof |
| WO2013159704A1 (en) * | 2012-04-27 | 2013-10-31 | 深圳深蓝精机有限公司 | Welding detection device and automatic welding machine |
| CN105136575A (en) * | 2015-09-07 | 2015-12-09 | 江苏大学 | Welding-type superhard blade mechanical property test device and method |
| CN108871945A (en) * | 2017-05-10 | 2018-11-23 | 大族激光科技产业集团股份有限公司 | A kind of test method and fixture of plastic material sample weld strength |
| CN111855952A (en) * | 2020-07-31 | 2020-10-30 | 山西北方机械制造有限责任公司 | Method and device for rapidly testing welding performance of 35# steel |
| CN111855952B (en) * | 2020-07-31 | 2022-10-28 | 山西北方机械制造有限责任公司 | Method and device for rapidly testing welding performance of 35# steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101900651B (en) | 2012-10-03 |
| WO2012003794A1 (en) | 2012-01-12 |
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