CN110666320A - 300-series stainless steel Taylor double-welding-wheel resistance seam welding process - Google Patents
300-series stainless steel Taylor double-welding-wheel resistance seam welding process Download PDFInfo
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- CN110666320A CN110666320A CN201910993729.6A CN201910993729A CN110666320A CN 110666320 A CN110666320 A CN 110666320A CN 201910993729 A CN201910993729 A CN 201910993729A CN 110666320 A CN110666320 A CN 110666320A
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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
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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
- B23K11/30—Features relating to electrodes
- B23K11/3036—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
- B23K11/34—Preliminary treatment
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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
- B23K11/36—Auxiliary equipment
Abstract
The invention discloses a 300 series stainless steel Taylor double-welding-wheel resistance seam welding process, which is characterized in that welding process parameters controlled when the Taylor double-welding-wheel resistance seam welding is adopted comprise: welding current, welding speed, lap joint quantity, 1# welding wheel pressure and 2# welding wheel pressure; the welding speed is 750cm/min, the lap joint amount is 2mm, the pressure of the welding wheel No. 1 is 950 kg, and the pressure of the welding wheel No. 2 is 950 kg; the value of the welding current is adjusted according to the thickness of the 300 stainless steel strip steel. The invention has the beneficial effects that the technological parameters of 300 series stainless steel Taylor double-welding wheel resistance seam welding with the thickness less than or equal to 1.5mm are provided, the welding current and the overlap amount of the welding seam are set according to the thickness of the strip steel, the welding seam fusion is improved, the strength and the toughness of the welding seam are optimized, the welding seam is flat and smooth, the phenomena of cracking, incomplete fusion, incomplete penetration and welding penetration are avoided, the production and processing requirements of an annealing and pickling production line are met, the product quality is ensured, and the yield is improved.
Description
Technical Field
The invention belongs to the technical field of stainless steel welding, and particularly relates to a Taylor double-welding-wheel resistance seam welding process for guaranteeing continuous production of 300-series stainless steel.
Background
The stainless steel has very strict requirements on the surface quality, and during the operation of an annealing and pickling line, the speed of a process section is greatly reduced most abstainly, so that the over-annealing phenomenon of the strip steel in an annealing furnace can be caused, and the defects of over-pickling and pollution of the strip steel in a subsequent pickling section can be caused; the influence of the stop of the production line is the largest, so that the good weldability of the inlet is ensured, and the continuous and stable operation of the production line is very important. Therefore, the welding machine is key equipment for ensuring the continuous production of the stainless steel plate annealing line and has the function of welding and connecting the front and the rear coils of strip steel. The continuous annealing unit has the characteristics of high production rhythm, more passes in the furnace, huge shutdown loss and the like, and requires a welding machine to have high welding efficiency, stable welding process, smooth and no obvious bulge on the surface of a welding seam, high welding seam strength, good welding seam toughness, and the phenomena of incomplete penetration, incomplete fusion, slag inclusion, welding perforation and the like. In the prior art, a Taylor double-welding-wheel resistance seam welding machine is used for welding in the production of chrome-nickel (300 series in the United states), the welding machine is of a double-welding-wheel rolling seam welding type, the adopted principle is a resistance welding middle seam welding principle, metal does not need to be filled during welding, the production efficiency is high, the deformation of a welding piece is small, and automation is easy to realize. After the welding under the existing process conditions is finished, the welding seam is easy to crack, unfused, and shrunk holes and other defects, so that the strength and toughness of the welding seam are insufficient, the welding seam passes through a production line and passes through a plurality of rollers (forward and reverse bending) with different diameters (phi 110-phi 1000mm) from an inlet to an outlet, so that the deformation of the welding seam is large, and the strip breakage phenomenon is easy to occur. In order to avoid the accidents, the welding line needs to be operated to a test table, slight cracking phenomenon exists in the middle of surface observation, a sand hammer is used for beating the welding line to test whether the welding line can meet the production requirement, the welding line cracks immediately after beating test by the sand hammer, the production requirement cannot be met, the welding line needs to be returned to a welding machine for shearing and welding again, and the steps are repeated; repeated welding and repeated inspection are carried out, the welding time of the inlet of the production line is too long, the loop quantity of the inlet and the outlet of the production line is insufficient, the speed of strip steel in a process section has to be reduced, the production efficiency and the yield are seriously influenced, the welding time of part of steel plates is too long, the loop quantity of the production line is seriously insufficient, the steel plates can only be stopped, and the quality of the on-line stainless steel plates is influenced while the yield is influenced. In order to ensure the normal operation of the production line and the quality of products, under the condition that the inspection is unqualified, the carbon dioxide gas shielded welding is used for re-welding only after the resistance seam welding, so as to ensure the performance of the welding seam.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art when 300 series stainless steel is welded, the invention aims to provide a 300 series stainless steel Taylor double-welding-wheel resistance seam welding process, which improves the weldability, ensures the normal operation of an annealing and pickling line, ensures the product quality and improves the yield.
2. Technical scheme
In order to achieve the purpose, the invention adopts the following technical scheme:
a300 series stainless steel Taylor double welding wheel resistance seam welding process is characterized in that welding process parameters controlled when the Taylor double welding wheel resistance seam welding is adopted comprise: welding current, welding speed, lap joint quantity, 1# welding wheel pressure and 2# welding wheel pressure; the welding speed is 750cm/min, the lapping amount is 2mm, the pressure of the 1# welding wheel is 950 kg, and the pressure of the 2# welding wheel is 950 kg; the unit of the welding current is ampere (A), the value of the welding current is adjusted according to the thickness of 300 stainless steel strip steel, and the specific table is as follows:
| thickness (mm) | 0.6 | 0.7 | 0.8 | 0.9 | 1.0 | 1.2 | 1.5 |
| Welding current (A) | 7000 | 7100 | 7200 | 7300 | 7400 | 7600 | 7800 |
The resistance seam welding process of the Taylor double-welding wheel provided by the invention is used for welding stainless steel with the grades of 304, 316L, 321 and 301.
The invention uses the resistance seam welder of Taylor's double-welding wheel, the structure includes:
the welding wheel mechanism comprises two groups of resistance welding wheels (a 1# welding wheel and a 2# welding wheel) and a group of flattening wheels, and is arranged on the welding trolley;
the welding wheel power supply system comprises a rectifying unit and a welding transformer, wherein a current induction coil is arranged on the welding transformer and transmits a current signal to the rectifying unit; when the current changes, the rectifying unit can automatically adjust and control the trigger angle to keep the welding current stable;
the double-cutting shear is arranged on the welding trolley, and the strip steel joints are cut to be uniform before welding, so that conditions are created for the next step of accurate lap joint and welding;
the front and rear strip steel centering devices comprise front and rear centering clamps, vertical guide rollers, sleeve lifting rollers and pinch rollers, and align the strip tail of the front strip steel and the strip head of the rear strip steel to create conditions for welding;
the punching device is used for punching and marking the weld joint and is used for tracking the position of the full-line weld joint;
and the auxiliary system comprises a pneumatic system, a power supply system, a rectification system, a cooling system and a computer control system.
The pressure of the welding wheel of the No. 1 welding wheel and the pressure of the No. 2 welding wheel of the Taylor double-welding-wheel resistance welding machine can be independently adjusted, and the welding heat of the two welding wheels can be adjusted by adjusting the pressure of the welding wheels because the contact resistance of the lap joint of the strip steel is changed along with the change of the pressure of the welding wheels. During welding, the 1# welding wheel and the 2# welding wheel perform relay heating on the strip steel; and the subsequent resistance welding wheel carries out secondary heating on the welding line, controls the cooling speed of the welding line and obtains an ideal metallurgical structure.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that the technological parameters of 300 series stainless steel Taylor double-welding wheel resistance seam welding with the thickness less than or equal to 1.5mm are provided, the welding current and the overlap amount of the welding seam are set according to the thickness of the strip steel, the welding seam fusion is improved, the strength and the toughness of the welding seam are optimized, the welding seam is smooth and flat, the phenomena of cracking, incomplete fusion, incomplete penetration and welding penetration are avoided, the production and processing requirements of an annealing and pickling production line are met, the normal operation of the production line is ensured, and the yield is improved on the premise of ensuring the quality of stainless steel products.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram showing the positional relationship between the strip steel welded by resistance seam welding with the Taylor double welding wheels.
In the figure: 1-1# welding wheel 2-2# welding wheel 3-strip steel.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Comparative example 1
The technological parameters to be controlled during resistance seam welding of the Taylor double welding wheel comprise: the welding device comprises a current, a welding speed, a lap joint quantity, a 1# welding wheel pressure and a 2# welding wheel pressure, wherein the value range of the parameters is selected according to the thickness of stainless steel strip steel, and the welding device is specifically as follows:
the welding process parameters of the comparative example 1 are welded by stainless steel with the grades of 304, 316L, 321 and 301, the welded joint after welding has slight cracking phenomenon and higher fusion property, and the requirements of annealing and pickling operation cannot be met.
Comparative example 2
The technological parameters to be controlled during resistance seam welding of the Taylor double welding wheel comprise: the welding device comprises a current, a welding speed, a lap joint quantity, a 1# welding wheel pressure and a 2# welding wheel pressure, wherein the value range of the parameters is selected according to the thickness of stainless steel strip steel, and the welding device is specifically as follows:
the welding process parameters of the comparative example 2 are welded by stainless steel with the grades of 304, 316L, 321 and 301, the welded joint after welding has slight cracking, the fusion property is better than that of the comparative example 1, and the requirements of annealing and pickling operation cannot be met.
Comparative example 3
The technological parameters to be controlled during resistance seam welding of the Taylor double welding wheel comprise: the welding device comprises a current, a welding speed, a lap joint quantity, a 1# welding wheel pressure and a 2# welding wheel pressure, wherein the value range of the parameters is selected according to the thickness of stainless steel strip steel, and the welding device is specifically as follows:
the welding process parameters of comparative example 2 were welded with stainless steel grades 304, 316L, 321, 301, and the fusion after welding was good, with more spatter on both sides of the weld.
Example 1
A300 series stainless steel Taylor double welding wheel resistance seam welding process is characterized in that welding process parameters controlled when the Taylor double welding wheel resistance seam welding is adopted comprise: welding current, welding speed, lap joint quantity, 1# welding wheel pressure and 2# welding wheel pressure; the welding speed is 750cm/min, the lap joint amount is 2mm, the pressure of the welding wheel No. 1 is 950 kg, and the pressure of the welding wheel No. 2 is 950 kg; the welding current unit is ampere (A), and the value of the welding current is adjusted according to the thickness of 300 stainless steel strip steel, and is shown in the following table:
the stainless steel with the grades of 304, 316L, 321 and 301 is welded by using the welding process parameters in the embodiment 1, after the welding is completed, the welding seam runs to a test bench, the fusion property is good, the splashing on two sides of the welding seam is little, the welding seam is smooth, the surface observation has no cracking phenomenon, the welding seam is knocked by using a sand hammer, and the welding seam does not crack after the knocking test by using the sand hammer. The strip steel can smoothly reach an outlet when the strip steel is operated to an annealing furnace continuous production line.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A300 series stainless steel Taylor double welding wheel resistance seam welding process is characterized in that: the welding technological parameters controlled during resistance seam welding by adopting the Taylor double welding wheels comprise: welding current, welding speed, lap joint quantity, 1# welding wheel pressure and 2# welding wheel pressure; the welding speed is 750cm/min, the lapping amount is 2mm, the pressure of the 1# welding wheel is 950 kg, and the pressure of the 2# welding wheel is 950 kg; the unit of the welding current is ampere (A), the value of the welding current is adjusted according to the thickness of 300 stainless steel strip steel, and the specific table is as follows:
2. The 300-series stainless steel Taylor double-welding-wheel resistance seam welding process according to claim 1, characterized in that: the welding process is used for welding stainless steel with the grades of 304, 316L, 321 and 301.
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| CN201910993729.6A CN110666320A (en) | 2019-10-18 | 2019-10-18 | 300-series stainless steel Taylor double-welding-wheel resistance seam welding process |
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| CN201910993729.6A CN110666320A (en) | 2019-10-18 | 2019-10-18 | 300-series stainless steel Taylor double-welding-wheel resistance seam welding process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935012A (en) * | 2021-02-23 | 2021-06-11 | 山西太钢不锈钢精密带钢有限公司 | Method for coiling precision stainless steel foil with variable inner diameter |
| CN115055918A (en) * | 2022-06-17 | 2022-09-16 | 首钢智新迁安电磁材料有限公司 | Continuous rolling method of non-oriented silicon steel |
Citations (5)
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| US5676862A (en) * | 1994-03-07 | 1997-10-14 | Taylor Winfield Corporation | Electric resistance welder having capability of consistent seam welding and heat-treating |
| JP2000005879A (en) * | 1998-06-24 | 2000-01-11 | Nippon Steel Corp | Method and device for resistance seam welding |
| CN2635268Y (en) * | 2003-08-31 | 2004-08-25 | 武汉凯奇特种焊接设备有限责任公司 | Electric resistance seam welding machine used for welding high hardness belt steel |
| CN103831520A (en) * | 2012-11-23 | 2014-06-04 | 天津市亿博制钢有限公司 | Cold-rolled strip welding technology method |
| CN104842056A (en) * | 2015-05-11 | 2015-08-19 | 唐山钢铁集团有限责任公司 | Narrow lap joint welding process for cold-rolled dual-phase steel strips |
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2019
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Patent Citations (5)
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| US5676862A (en) * | 1994-03-07 | 1997-10-14 | Taylor Winfield Corporation | Electric resistance welder having capability of consistent seam welding and heat-treating |
| JP2000005879A (en) * | 1998-06-24 | 2000-01-11 | Nippon Steel Corp | Method and device for resistance seam welding |
| CN2635268Y (en) * | 2003-08-31 | 2004-08-25 | 武汉凯奇特种焊接设备有限责任公司 | Electric resistance seam welding machine used for welding high hardness belt steel |
| CN103831520A (en) * | 2012-11-23 | 2014-06-04 | 天津市亿博制钢有限公司 | Cold-rolled strip welding technology method |
| CN104842056A (en) * | 2015-05-11 | 2015-08-19 | 唐山钢铁集团有限责任公司 | Narrow lap joint welding process for cold-rolled dual-phase steel strips |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935012A (en) * | 2021-02-23 | 2021-06-11 | 山西太钢不锈钢精密带钢有限公司 | Method for coiling precision stainless steel foil with variable inner diameter |
| CN115055918A (en) * | 2022-06-17 | 2022-09-16 | 首钢智新迁安电磁材料有限公司 | Continuous rolling method of non-oriented silicon steel |
| CN115055918B (en) * | 2022-06-17 | 2023-09-19 | 首钢智新迁安电磁材料有限公司 | Continuous rolling method of non-oriented silicon steel |
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