CN114226939A - Method for judging weld joint quality of strip steel welded by narrow lap welder - Google Patents
Method for judging weld joint quality of strip steel welded by narrow lap welder Download PDFInfo
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- CN114226939A CN114226939A CN202210128535.1A CN202210128535A CN114226939A CN 114226939 A CN114226939 A CN 114226939A CN 202210128535 A CN202210128535 A CN 202210128535A CN 114226939 A CN114226939 A CN 114226939A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003466 welding Methods 0.000 claims abstract description 117
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims abstract description 19
- 238000005457 optimization Methods 0.000 claims abstract description 10
- 230000008719 thickening Effects 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 238000010008 shearing Methods 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 8
- 229910000975 Carbon steel Inorganic materials 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 238000009966 trimming Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/06—Resistance welding; Severing by resistance heating using roller electrodes
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a method for judging the weld joint quality of strip steel welded by a narrow lap welder, which comprises the following steps: shearing strip steel, overlapping the tail part of a first sheared strip steel and the head part of a second sheared strip steel, welding, rolling the overlapped part by using a copper welding wheel after being electrified to obtain a high-strength welding seam, and flattening the welding seam by using a rolling wheel to enable the strip steel to be continuously produced, wherein the welding process parameters comprise that the welding current is 10-24 KA, the welding speed is 8-15 m/min, the welding wheel pressure is 14-25 KN, the overlapping amount parameter is 0.5-1.8 mm, and the overlapping compensation amount parameter is 0.3-1.5 mm; setting parameters of a welding line detection optimization system, wherein an upper thickening parameter is set to be-0.8 mm, an upper height difference parameter is set to be-0.95 mm, an upper lap joint position parameter is set to be-2 mm, and the welding line temperature is set to be 500-1300 ℃; and detecting whether the welding is qualified or not through a welding seam detection optimization system, if the welding seam detection optimization system accords with the set parameters, determining that the welding seam is qualified, and otherwise, determining that the welding seam is unqualified.
Description
Technical Field
The invention belongs to the technical field of strip steel welding, and particularly relates to a method for judging the quality of a welding seam of strip steel welded by a narrow lap welder.
Background
The continuous annealing production line is a production line for realizing continuous production by welding strip steel, and is an important technological means for improving the production efficiency and reducing the production cost of modern iron and steel enterprises. A narrow lap welding machine belongs to the field of resistance welding, and relates to a welding method for melting and combining weldments by utilizing heat generated after resistance is electrified. For steel with poor welding incoming material plate shape, high alloy content, high carbon equivalent and strong hardenability after welding, the hardness of a weld heat affected zone is high, the weldability is poor, and band breakage accidents along a weld joint are easy to happen in a high-tension and high-temperature environment. Meanwhile, the belt head and the belt tail of the current production line are in a state of being buckled downwards through the rear plate type of the straight head machine, the gap detection is normal before welding in the state, but after the welding wheel is pressed down and rolled, the strip steel at the inlet and the outlet are easily piled together, and the curve can only reflect the condition before welding, so that the curve shows the normal condition but the actual welding plate type is not good.
The method for judging welding quality through parameter setting of a welding seam quality detection system in the prior patent No. CN202011576063.3 aims at a laser welding machine, and parameter setting (welding seam surplus height, welding seam undercut, and penetration rate) is completely different from parameters (upper thickening, upper height difference, upper lapping position and welding seam temperature) set by a narrow lapping welding machine.
An on-line collection device for the weld quality of a laser welding machine with the patent number of CN201721088761.2 is disclosed, and the embodiment of the on-line collection device only introduces the on-line collection device, does not mention the setting range of related detection parameters, and cannot provide an effective method for judging the weld quality.
Disclosure of Invention
The invention aims to provide a method for judging the weld joint quality of strip steel welded by a narrow lap welder.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for judging the weld quality of strip steel welded by a narrow lap welder comprises the following steps:
1) shearing strip steel, overlapping the tail part of a first sheared strip steel and the head part of a second sheared strip steel, welding, rolling the overlapped part by using a copper welding wheel after being electrified to obtain a high-strength welding seam, and flattening the welding seam by using a rolling wheel to enable the strip steel to be continuously produced, wherein the welding process parameters comprise that the welding current is 10-24 KA, the welding speed is 8-15 m/min, the welding wheel pressure is 14-25 KN, the overlapping amount parameter is 0.5-1.8 mm, and the overlapping compensation amount parameter is 0.3-1.5 mm;
2) setting parameters of a welding line detection optimization system, wherein an upper thickening parameter is set to be-0.8 mm, an upper height difference parameter is set to be-0.95 mm, an upper lap joint position parameter is set to be-2 mm, and the welding line temperature is set to be 500-1300 ℃;
3) and detecting whether the welding is qualified or not through a welding seam detection optimization system, if the welding seam detection optimization system accords with the set parameters, determining that the welding seam is qualified, and otherwise, determining that the welding seam is unqualified.
The invention has the following beneficial effects: 1) according to the invention, through scientifically and reasonably selecting and setting the welding seam quality detection parameters, the defects of the traditional manual experiment verification are avoided, the time is saved, the welding quality is accurately judged, and the risk of fracture of the welding seam in the production line operation process caused by the detection error of the welding seam quality is avoided; 2) the parameters of the welding seam detection system are suitable for various types of steel and the thickness of strip steel.
Detailed Description
The present invention will now be described in further detail.
A method for judging the weld quality of strip steel welded by a narrow lap welder comprises the following steps:
1) the method for directly and automatically judging the welding quality through the unique parameter setting of the online welding seam detection system can judge the reliability of the welding seam quality without the help of the traditional cup-convex experiment for detecting the welding seam. The method specifically includes the steps that the tail portion of a front-rolling strip steel and the head portion of a rear-rolling strip steel are overlapped with each other after the front-rolling strip steel and the rear-rolling strip steel are cut back and forth, appropriate current, pressure and speed are selected, welding wheels roll the front-rolling and rear-rolling places through a movable frame by means of electrified copper welding wheels to obtain high-strength welding seams, and then the welding seams are leveled by rolling wheels, so that the strip steel can be continuously produced.
2) Wherein the unique parameter settings of the weld detection optimization system include: the upper thickening parameter is set to be (-0.8 mm), the upper height difference parameter is set to be (-0.95 mm), the upper lapping position parameter is set to be (-2 mm), the welding seam temperature is set to be (500-1300) DEG C, when the 4 detection parameters are all in the upper and lower limit ranges after welding is completed, the qualified welding seam is determined, and when one detection parameter is not met, the unqualified welding seam is determined.
3) Welding technological parameters are as follows: the welding current is (10-24) KA; the welding speed is (8-15) m/min; the pressure of the welding wheel is (14-25) KN; the parameters of the lap joint amount are (0.5-1.8) mm, and the parameters of the lap joint compensation amount are (0.3-1.5) mm.
The first embodiment is as follows:
producing varieties: DC01 straight carbon steel and DC01 straight carbon steel
Specification: 0.5 x 1242mm and 0.38 x 1166.
And welding the strip steel by a narrow lap welder on a continuous annealing production line.
The welding process comprises the following steps: the head and the tail of the strip steel are sheared by the entrance scissors, and the tail of the front strip steel is lapped with the head of the rear strip steel and then welded.
The welding process comprises the following steps: the welding current is 13 KA; the welding speed is 15 m/min; the pressure of the welding wheel is 9 KN; the lap joint amount is 0.7 mm; the compensation amount is 0.5 mm; and (4) trimming the weld joint by using a post-welding rolling wheel, wherein the rolling force is selected to be high pressure.
All parameters after welding meet four requirements: the upper thickening parameter is set to (-0.8 mm), the upper height difference parameter is set to (-0.95 mm), the upper lapping position parameter is set to (-2 mm), and the welding seam temperature is set to (500-1300) DEG C.
The strip steel welded by the welding process passes through a cleaning section, a loop, a heating furnace, a leveling unit and the like, and the quality of a welding seam is good after the strip steel is off-line, and no crack or damage exists.
Example two:
producing varieties: DC04 deep drawing steel and DC05 deep drawing steel
Specification: 2.02 x 1348mm and 2.02 x 1347 mm.
The strip steel is welded by adopting a narrow lap welder on a continuous production line.
The welding process comprises the following steps: the head and the tail of the strip steel are sheared by the entrance scissors, and the tail of the front strip steel is lapped with the head of the rear strip steel and then welded.
The welding process comprises the following steps: the welding current is 22 KA; the welding speed is 8.5 m/min; the pressure of the welding wheel is 17 KN; the lap joint amount is 1.5 mm; the compensation amount is 1 mm; and (4) trimming the weld joint by using a post-welding rolling wheel, wherein the rolling force is selected to be high pressure.
All parameters after welding meet four requirements: the upper thickening parameter is set to (-0.8 mm), the upper height difference parameter is set to (-0.95 mm), the upper lapping position parameter is set to (-2 mm), and the welding seam temperature is set to (500-1300) DEG C.
The strip steel welded by the welding process passes through a cleaning section, a loop, a heating furnace, a leveling unit and the like, and the quality of a welding seam is good after the strip steel is off-line, and no crack or damage exists.
Example three:
producing varieties: DC01 plain carbon steel and SPCC plain carbon steel
Specification: 1.2 x 1400mm and 1.2 x 1400 mm.
The strip steel is welded by adopting a narrow lap welder on a continuous annealing production line.
The welding process comprises the following steps: the head and the tail of the strip steel are sheared by the entrance scissors, and the tail of the front strip steel is lapped with the head of the rear strip steel and then welded.
The welding process comprises the following steps: the welding current is 19 KA; the welding speed is 15 m/min; the pressure of the welding wheel is 12.5 KN; the lap joint amount is 1.2 mm; the compensation amount is 0.8 mm; and (4) trimming the weld joint by using a post-welding rolling wheel, wherein the rolling force is selected to be high pressure.
The parameters after welding do not meet four requirements: the welding seam temperature is set to be (500-1300) DEG C, and the actual value reaches 1500 ℃. The band steel welded by the welding process has poor welding seam quality and cracks and damages.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (1)
1. A method for judging the weld joint quality of strip steel welded by a narrow lap welder is characterized by comprising the following steps:
1) shearing strip steel, overlapping the tail part of a first sheared strip steel and the head part of a second sheared strip steel, welding, rolling the overlapped part by using a copper welding wheel after being electrified to obtain a high-strength welding seam, and flattening the welding seam by using a rolling wheel to enable the strip steel to be continuously produced, wherein the welding process parameters comprise that the welding current is 10-24 KA, the welding speed is 8-15 m/min, the welding wheel pressure is 14-25 KN, the overlapping amount parameter is 0.5-1.8 mm, and the overlapping compensation amount parameter is 0.3-1.5 mm;
2) setting parameters of a welding line detection optimization system, wherein an upper thickening parameter is set to be-0.8 mm, an upper height difference parameter is set to be-0.95 mm, an upper lap joint position parameter is set to be-2 mm, and the welding line temperature is set to be 500-1300 ℃;
3) and detecting whether the welding is qualified or not through a welding seam detection optimization system, if the welding seam detection optimization system accords with the set parameters, determining that the welding seam is qualified, and otherwise, determining that the welding seam is unqualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210128535.1A CN114226939A (en) | 2022-02-11 | 2022-02-11 | Method for judging weld joint quality of strip steel welded by narrow lap welder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210128535.1A CN114226939A (en) | 2022-02-11 | 2022-02-11 | Method for judging weld joint quality of strip steel welded by narrow lap welder |
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| CN202210128535.1A Pending CN114226939A (en) | 2022-02-11 | 2022-02-11 | Method for judging weld joint quality of strip steel welded by narrow lap welder |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5133743A (en) * | 1974-09-17 | 1976-03-23 | Toyota Motor Co Ltd | Teikotenyosetsu no hinshitsuhanteihohooyobisochi |
| CN101566546A (en) * | 2007-12-12 | 2009-10-28 | 通用汽车环球科技运作公司 | Online weld inspection and repair method for resistance welding and weld-bonding |
| CN101629912A (en) * | 2009-08-10 | 2010-01-20 | 西部金属材料股份有限公司 | Determination method of reliability of titanium welding seam of titanium steel composite board equipment |
| CN103542819A (en) * | 2012-07-17 | 2014-01-29 | 宝山钢铁股份有限公司 | Detection and quality judgment method for strip steel weld surface appearance |
| CN109909595A (en) * | 2019-03-29 | 2019-06-21 | 山东钢铁集团日照有限公司 | A kind of narrow overlap joint welding method of 590MPa grades of cold-rolled biphase steel and 270MPa straight carbon steel |
| CN112846514A (en) * | 2020-12-28 | 2021-05-28 | 山东钢铁集团日照有限公司 | Method for judging welding quality through parameter setting of welding seam quality detection system |
-
2022
- 2022-02-11 CN CN202210128535.1A patent/CN114226939A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5133743A (en) * | 1974-09-17 | 1976-03-23 | Toyota Motor Co Ltd | Teikotenyosetsu no hinshitsuhanteihohooyobisochi |
| CN101566546A (en) * | 2007-12-12 | 2009-10-28 | 通用汽车环球科技运作公司 | Online weld inspection and repair method for resistance welding and weld-bonding |
| CN101629912A (en) * | 2009-08-10 | 2010-01-20 | 西部金属材料股份有限公司 | Determination method of reliability of titanium welding seam of titanium steel composite board equipment |
| CN103542819A (en) * | 2012-07-17 | 2014-01-29 | 宝山钢铁股份有限公司 | Detection and quality judgment method for strip steel weld surface appearance |
| CN109909595A (en) * | 2019-03-29 | 2019-06-21 | 山东钢铁集团日照有限公司 | A kind of narrow overlap joint welding method of 590MPa grades of cold-rolled biphase steel and 270MPa straight carbon steel |
| CN112846514A (en) * | 2020-12-28 | 2021-05-28 | 山东钢铁集团日照有限公司 | Method for judging welding quality through parameter setting of welding seam quality detection system |
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Application publication date: 20220325 |
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