CN104227259A - Process method for verifying welding technological property of welding equipment for seam welding of stainless steel car body - Google Patents
Process method for verifying welding technological property of welding equipment for seam welding of stainless steel car body Download PDFInfo
- Publication number
- CN104227259A CN104227259A CN201410454031.4A CN201410454031A CN104227259A CN 104227259 A CN104227259 A CN 104227259A CN 201410454031 A CN201410454031 A CN 201410454031A CN 104227259 A CN104227259 A CN 104227259A
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- welding
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- weld
- section
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- 238000003466 welding Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 40
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 11
- 239000010935 stainless steel Substances 0.000 title claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 68
- 230000004927 fusion Effects 0.000 claims abstract description 19
- 230000007547 defect Effects 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims description 28
- 230000035515 penetration Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 10
- 238000005070 sampling Methods 0.000 abstract description 9
- 239000010953 base metal Substances 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 1
- 238000011179 visual inspection Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- B23K31/125—Weld quality monitoring
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Resistance Welding (AREA)
Abstract
The invention relates to a process method for verifying the welding technological property of welding equipment for seam welding of a stainless steel car body. The process method is characterized by also comprising a leakage test and a cross section test, and two layers of base metals are overlapped to weld. The cross section test comprises a continuous weld vertical direction test and a test along the continuous weld direction, an overlapping manner of an upper layer of plate and a layer of plate is adopted, locations of cross sections of a welding core are symmetrical relative to the center of the welding core, the shape of the welding core is checked through visual inspection at first, and the depth of fusion and the internal defect of the welding core are observed through a metallographic test. The leakage test is characterized in that a square sample is welded to seal continuously, a square hole is formed in the middle position of the upper layer of a base metal, a steel pipe is welded on the square hole for compressed air to flow in, and the sample and a device for limiting deformation are put in a water tank to see if air bubbles exist or not. According to the process method for verifying the welding technological property of the welding equipment for seam welding the stainless steel car body, the sampling process, the sampling quantity and the process technology method are confirmed; the test tool and the test process technology of the leakage manner detection are confirmed; the standard of the weld defects of the cross section manner is confirmed; the equipment is used for producing multiple project products, and the products meet the quality requirement, so that the reliability of the process method is proved.
Description
Technical field
The present invention relates to welding procedure, especially relate to the technological checking technique of a kind of seam weldering welding equipment.
Background technology
In the light-weighted stainless steel vihicle of current each requirements of the owner, steel structure roof, underframe corrugated plating adopt multi-disc width at about 200mm-1000mm, length has been welded in the technology of cold-forming shapes seam weldering (i.e. series spot welding) of about 500mm-250000mm, be called the seam weldering of stainless steel vihicle, the performance of welding equipment has been the key factor of seam weldering.Install and improved equipment new, need the verification technique studying a set of welding technological properties, can apply in actual production.
Summary of the invention
Technical problem to be solved by this invention is the checking process of the roof corrugated plating of stainless steel vehicle and the welding technological properties of the welding equipment of underframe corrugated plating seam weldering (series spot welding) after new installation and the transformation source of welding current, regulation engineer testing type, method, standard, basic demand etc., to make to make according to this technological requirement the welding equipment verified, welding technological properties index reaches requirement, and equipment can be applied in actual production.
For solving the problems of the technologies described above, the invention provides a kind of stainless steel car body seam weldering welding equipment welding technological properties checking process, comprise mother metal requirement, welding equipment requirement, soldered mother metal jointing requirements, position while welding requirement, it is characterized in that: also comprise leak test and section test, the carrying out adopting two-layer mother metal to stack is welded;
Section test comprises to be tested with continuous weld vertical direction and tests along continuous weld direction, in test, welding material used is identical with the material used in actual job with disk electrode, section test adopts upper and lower two-ply to stack mode, weld one continuous print straight bead, materialsing respectively with continuous weld vertical direction with along continuous weld direction, respectively get 4, cutting sample with continuous weld vertical direction, the cross section place of nugget wants relative nugget Central Symmetry; Along continuous weld direction, adopt Cutting Length 25mm sample, these two kinds of samples are all first estimated, and check the shape of nugget, by metallographic test, observe nugget fusion penetration and internal flaw; The standard on data of nugget fusion penetration has two standard-requireds, and to meet simultaneously, one is in the section with continuous weld vertical direction is tested, nugget ovalisation, at the fusion penetration of the upper and lower laminate of the center position of Spot size not higher than 0.9 times of upper and lower laminate mother metal thickness; In distance Spot size position, 0.4 times, nugget center, the fusion penetration of upper and lower laminate is not less than 0.2 times of upper and lower laminate mother metal thickness; Another is: carrying out in section test along the Weld pipe mill line position in continuous weld direction, the shape that nugget becomes multiple ellipse to intersect, the fusion penetration of the upper and lower laminate at position of intersecting point place not higher than 0.9 times of upper and lower laminate mother metal thickness, will be not less than the fusion penetration 0.2 times of the 0.4 times of Spot size position, distance nugget center in testing with weld seam vertical cross section; To the defect of nugget inner air vent, wherein the size length of any one gas hole defect must at less than 15% of Spot size length; All defect length adds up to must at less than 25% of Spot size, and 15% scope that starts at oval nugget periphery of these defects is with external position simultaneously;
Leak test is welding square coupons, and close continuously, mother metal centre position, upper strata opening square hole, square hole position welded still pipe, for passing into compressed air, sample welding 10 is respectively put in the device of restrained deformation, this device has adjustment clamp nut, for to adjust the internal height of device and fastening, be convenient to the control to sample deformation, device internal height at least will meet the summation of 2 mother metal thickness and maximum deformation quantity 20mm, the logical upper compressed air of steel pipe outlet connection of sample, then the device of sample and restrained deformation is put in tank, in leak test process, judge whether that the method for leaking has two kinds, be the standard reaching 1.47X105pa (1.5kgf/cm2) by the air pressure increased, another kind is progressively increasing in air pressure process, and the distortion of test film reaches the standard of 20mm, in process of the test, these two kinds of methods, reach the standard of test requirements document no matter any, and do not produce air leakage problem, test completes.
Electrode requires: electrode adopts disk electrode, and material is CrZrCu, and Vickers hardness is greater than 145, and Rockwell hardness is greater than 75.
The advantage that the present invention has relative to prior art and progress
1 project, the kind that specify that welding equipment technological property test.
2 specify that sampling craft, quantity of sampling quantity and technology method that section mode is checked.
3 specify that sampling craft, quantity of sampling quantity and technology method that leakage way is checked.
4 specify that the test tool that leakage way is checked and test technology technology.
5 standards that specify that the weld defect of section mode.
6 present invention process advantages of simple, have employed the verification experimental verification technology of this cover weldability at the First stainless steel seam-welding equipment introduced, result of the test meets the requirements, and carries out the production of multiple Project Product with this equipment, product all conforms to quality requirements, and this suffices to show that reliability of the present invention.
Accompanying drawing explanation
Fig. 1 is the sample schematic diagram of leak test;
Fig. 2 is the sample welding mode schematic diagram of leak test;
Fig. 3 is the restrained deformation device schematic diagram of leak test;
Fig. 4 is welding, the sampling mode schematic diagram of section test;
Fig. 5 is the defect schematic diagram of section test.
Detailed description of the invention
The present invention carries out under the new condition such as welding machine, scrap build, source of welding current change of installing.Trial stretch is in the envelop of function of the welding usability of welding machine, and two interfaces up and down that welding point is benchmark with the thin plate in thickness of slab combination are tested, checking reliability.
1, the requirement of mother metal
Equipment welding performance test, selects the chemical analysis of mother metal and mechanical performance to meet the requirement of SUS301L series, can not occur the defects such as segregation.
2, welding equipment requirement
Equipment must pass through other various tests, verifies qualified equipment.
Equipment has the device to welding current, electrode pressure, adjustable control conduction time.
Equipment has the device of burning voltage, when variation in voltage, by equipment voltage stabilizing function, realizes stabilizing output current.Have welding current, the device exporting monitoring weld interval simultaneously.
3, electrode requirement
Electrode adopts disk electrode, and material is CrZrCu, and Vickers hardness is greater than 145, and Rockwell hardness is greater than 75.
4, soldered mother metal jointing requirements
(1) welded mother metal weld seam must not exist the impurity harmful to resistance spot welding welding, as attachments such as corrosion, dust, greases, before welding, clean to mother metal surface protection membrane removal, wiped clean.
(2) between the plate of the position while welding of welded mother metal, laminating is good.
5, position while welding requirement
Weld pitch mother metal edges of boards minimum range L specifies according to design drawing, and under design drawing does not have rated condition, the thickness of slab of welding line joint is as the criterion with the mother metal thickness of outside thin plate, and the outside mother metal of different-thickness, according to corresponding standard.
6, welding equipment technological property test
Pilot project: pilot project divides leak test and section to test two kinds, the sample of leak test needs welding 10.Section test divides two kinds, and with continuous weld vertical direction with along continuous weld direction, sample respectively gets 4.
Welding material used and disk electrode in test, must be identical with the material used in actual job, and in whole welding process, welding condition can not change simultaneously.
(1) leak test
Leak test carries out welded specimen according to shown in Fig. 1,2 square coupons of part 1 and part 2 are adopted to stack welding, circular hole is opened in part 1 centre position, and circular hole position weldment 3 steel pipe, for connecting compressed air, the sample surrounding of Fig. 1 carries out seam weldering, form surrounding weld seam and close test specimen, shown in Fig. 2, position while welding is of a size of 300mmX300mm, weld 10 samples, put in the device of the restrained deformation shown in Fig. 3.In Fig. 3 device, part 4 base plate welds 4 part 5 round steel pipe, and upper end is threaded, the cover plate of top installed part 6, and part 4 is greater than 20mm(deflection with the cavity heights of part 6 and requires).The adjusting nut of appliance 7 carries out locking member 6.Then the device of sample and restrained deformation is put in tank, pass into compressed air, see if there is bubble, thus judge whether weld seam burn-ons.10 samples all do not have bubble to produce, and can think that leak test is qualified.
In leak test process, judge whether that the method for leaking has 2 kinds, a kind of air pressure being reaches 1.47X105pa (1.5kgf/cm2), and a kind of to be that the distortion of sample is maximum reach 20mm.These two kinds of methods, reach the standard of test requirements document no matter any, and do not produce air leakage problem, test completes.
(2) section test
Section test is according to the requirement welding shown in Fig. 4, and adopt part 1 and part 2 to stack and weld, weld seam is straight line.Sampling is adopted in two ways, and see Fig. 4, a kind of mode samples with weld seam vertical direction, and vertical cross section needs symmetry relative to nugget central shaft; One is along the sampling of continuous weld direction, sample length 25mm.Two kinds of modes respectively sample 4, first estimate, and check the face shaping of nugget, whether shape is symmetrical, and whether impression is even.
For section test, see the fusion penetration situation of nugget.The standard on data of nugget fusion penetration has two standard-requireds, and to meet simultaneously, one is: in the section with continuous weld vertical direction is tested, nugget ovalisation, at the fusion penetration of the upper and lower laminate of the center position of Spot size not higher than 0.9 times of upper and lower laminate mother metal thickness; In distance Spot size position, 0.4 times, nugget center, the fusion penetration of upper and lower laminate is not less than 0.2 times of upper and lower laminate mother metal thickness.Another is: carrying out in section test along the Weld pipe mill line position in continuous weld direction, the shape that nugget becomes multiple ellipse to intersect, the fusion penetration of the upper and lower laminate at position of intersecting point place not higher than 0.9 times of upper and lower laminate mother metal thickness, will be not less than the fusion penetration 0.2 times of the 0.4 times of Spot size position, distance nugget center in testing with weld seam vertical cross section.
To the defect of nugget inner air vent, wherein the size length of any one gas hole defect must at less than 15% of Spot size length; All defect length adds up to must at less than 25% of Spot size, and these defective locations can not appear at position within 15% scope that oval nugget periphery starts simultaneously, and shadow positions as shown in Figure 5 can not defectiveness.
Claims (2)
1. stainless steel car body seam weldering welding equipment welding technological properties checking process, comprise mother metal requirement, welding equipment requirement, soldered mother metal jointing requirements, position while welding requirement, it is characterized in that: also comprise leak test and section test, the carrying out adopting two-layer mother metal to stack is welded;
Section test comprises to be tested with continuous weld vertical direction and tests along continuous weld direction, in test, welding material used is identical with the material used in actual job with disk electrode, section test adopts upper and lower two-ply to stack mode, weld one continuous print straight bead, materialsing respectively with continuous weld vertical direction with along continuous weld direction, respectively get 4, cutting sample with continuous weld vertical direction, the cross section place of nugget wants relative nugget Central Symmetry; Along continuous weld direction, adopt Cutting Length 25mm sample, these two kinds of samples are all first estimated, and check the shape of nugget, by metallographic test, observe nugget fusion penetration and internal flaw; The standard on data of nugget fusion penetration has two standard-requireds, and to meet simultaneously, one is in the section with continuous weld vertical direction is tested, nugget ovalisation, at the fusion penetration of the upper and lower laminate of the center position of Spot size not higher than 0.9 times of upper and lower laminate mother metal thickness; In distance Spot size position, 0.4 times, nugget center, the fusion penetration of upper and lower laminate is not less than 0.2 times of upper and lower laminate mother metal thickness; Another is: carrying out in section test along the Weld pipe mill line position in continuous weld direction, the shape that nugget becomes multiple ellipse to intersect, the fusion penetration of the upper and lower laminate at position of intersecting point place not higher than 0.9 times of upper and lower laminate mother metal thickness, will be not less than the fusion penetration 0.2 times of the 0.4 times of Spot size position, distance nugget center in testing with weld seam vertical cross section; To the defect of nugget inner air vent, wherein the size length of any one gas hole defect must at less than 15% of Spot size length; All defect length adds up to must at less than 25% of Spot size, and 15% scope that starts at oval nugget periphery of these defects is with external position simultaneously;
Leak test is welding square coupons, and close continuously, mother metal centre position, upper strata opening square hole, square hole position welded still pipe, for passing into compressed air, sample welding 10 is respectively put in the device of restrained deformation, this device has adjustment clamp nut, for to adjust the internal height of device and fastening, be convenient to the control to sample deformation, device internal height at least will meet the summation of 2 mother metal thickness and maximum deformation quantity 20mm, the logical upper compressed air of steel pipe outlet connection of sample, then the device of sample and restrained deformation is put in tank, in leak test process, judge whether that the method for leaking has two kinds, be the standard reaching 1.47X105pa (1.5kgf/cm2) by the air pressure increased, another kind is progressively increasing in air pressure process, and the distortion of test film reaches the standard of 20mm, in process of the test, these two kinds of methods, reach the standard of test requirements document no matter any, and do not produce air leakage problem, test completes.
2. stainless steel car body seam weldering welding equipment welding technological properties checking process according to claim 1, is characterized in that: electrode adopts disk electrode, and material is CrZrCu, and Vickers hardness is greater than 145, and Rockwell hardness is greater than 75.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410454031.4A CN104227259B (en) | 2014-09-09 | 2014-09-09 | Stainless steel car body seam weldering welding equipment welding technological properties checking process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410454031.4A CN104227259B (en) | 2014-09-09 | 2014-09-09 | Stainless steel car body seam weldering welding equipment welding technological properties checking process |
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| CN104227259A true CN104227259A (en) | 2014-12-24 |
| CN104227259B CN104227259B (en) | 2016-01-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107818194A (en) * | 2016-09-12 | 2018-03-20 | 波音公司 | The cubing of method for verification component and the geometric properties for verification component |
| CN112881532A (en) * | 2021-01-20 | 2021-06-01 | 西北工业大学 | Ultrasonic detection test block for diffusion welding lamination defects, and preparation method and application thereof |
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| EP1836472A1 (en) * | 2004-12-30 | 2007-09-26 | Car-Ber Investments Inc. | Method and apparatus for applying axial stress for weld testing |
| US20090087083A1 (en) * | 2005-08-24 | 2009-04-02 | Cobasys, Llc. | Infra-red thermal imaging of laser welded battery module enclosure components |
| US7654434B2 (en) * | 2005-03-21 | 2010-02-02 | Infineon Technologies Ag | Method, device and system for bonding a semiconductor element |
| CN102310291A (en) * | 2011-08-31 | 2012-01-11 | 上海锅炉厂有限公司 | Dissimilar steel cold crack sensitivity test method |
| CN103056540A (en) * | 2012-12-19 | 2013-04-24 | 长春轨道客车股份有限公司 | Strength testing method for stainless steel multi-layer plate resistance spot welding joint before welding |
-
2014
- 2014-09-09 CN CN201410454031.4A patent/CN104227259B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1836472A1 (en) * | 2004-12-30 | 2007-09-26 | Car-Ber Investments Inc. | Method and apparatus for applying axial stress for weld testing |
| US7654434B2 (en) * | 2005-03-21 | 2010-02-02 | Infineon Technologies Ag | Method, device and system for bonding a semiconductor element |
| US20090087083A1 (en) * | 2005-08-24 | 2009-04-02 | Cobasys, Llc. | Infra-red thermal imaging of laser welded battery module enclosure components |
| CN102310291A (en) * | 2011-08-31 | 2012-01-11 | 上海锅炉厂有限公司 | Dissimilar steel cold crack sensitivity test method |
| CN103056540A (en) * | 2012-12-19 | 2013-04-24 | 长春轨道客车股份有限公司 | Strength testing method for stainless steel multi-layer plate resistance spot welding joint before welding |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107818194A (en) * | 2016-09-12 | 2018-03-20 | 波音公司 | The cubing of method for verification component and the geometric properties for verification component |
| CN107818194B (en) * | 2016-09-12 | 2023-11-03 | 波音公司 | Method for verifying a component and test fixture for verifying a geometric feature of a component |
| CN112881532A (en) * | 2021-01-20 | 2021-06-01 | 西北工业大学 | Ultrasonic detection test block for diffusion welding lamination defects, and preparation method and application thereof |
| CN112881532B (en) * | 2021-01-20 | 2023-02-24 | 西北工业大学 | Ultrasonic detection test block for diffusion welding lamination defects, and preparation method and application thereof |
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| CN104227259B (en) | 2016-01-27 |
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