CN110863085B - Stress on-line control method suitable for flux-cored wire for steel structure - Google Patents
Stress on-line control method suitable for flux-cored wire for steel structure Download PDFInfo
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- CN110863085B CN110863085B CN201911118062.1A CN201911118062A CN110863085B CN 110863085 B CN110863085 B CN 110863085B CN 201911118062 A CN201911118062 A CN 201911118062A CN 110863085 B CN110863085 B CN 110863085B
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- flux
- cored wire
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a stress on-line control method suitable for a flux-cored wire for a steel structure, which comprises the following steps: (1) after the flux-cored wire is rolled, drawn and reduced to reach the size of a finished product, the flux-cored wire passes through a high-frequency induction coil; (2) setting the walking speed and high-frequency induction heating parameters of the flux-cored wire in the coil, rapidly heating the outer steel belt of the flux-cored wire to the stress relief temperature range of 500-650 ℃, and performing online stress relief treatment on the flux-cored wire; (4) carrying out surface cleaning on the flux-cored wire subjected to online stress reduction treatment; (5) the flux-cored wire barreled package is suitable for the flux-cored wire final product with large-capacity barreled package. The method reduces the stress generated in the production process of the flux-cored wire, avoids the phenomena of wire disorder, wire clamping or wire breakage and the like of the flux-cored wire during barreling layer winding or use, meets the barreling requirement of the flux-cored wire, and promotes the engineering application of the high-efficiency automatic welding technology.
Description
Technical Field
The invention relates to an on-line stress control method suitable for a flux-cored wire for a steel structure, and belongs to the technical field of welding materials and processing.
Background
The welding technology is one of the important technologies for the construction of steel structure engineering. With the rapid development of the steel structure industry, higher requirements are provided for the welding quality and the welding efficiency. However, in China, manual or semi-automatic welding is mainly used for welding steel structures, the human influence factor of welding quality is large, production efficiency is difficult to effectively improve, and in addition, because of serious shortage of welders who meet the technical requirements and continuous rising of labor cost, the steel structure industry urgently needs to change the traditional welding processing mode so as to improve welding quality and welding efficiency. The robot automatic welding technology has the advantages of high quality, high efficiency and cost reduction, and becomes one of the hot spots concerned by steel structure industries at home and abroad.
With the gradual increase of the popularity of the robot automatic welding, the urgent requirements of the robot welding technology are to reduce the frequency of changing welding wires and reduce the auxiliary welding time. At present, most of welding materials used for welding of robots in China are commercially available disc-shaped welding wires, the packages of the welding materials are 12.5 kg/disc (gas shielded flux-cored wires) or 15 kg/disc (gas shielded solid-cored wires), the welding wires need to be replaced in the welding process after each disc of welding wires is consumed, the continuity of the welding process is reduced, and the further improvement of the welding production efficiency is limited; the package weight of the barreled wire is usually more than 100 kg/barrel, and the welding efficiency can be improved by at least 6 times only in terms of wire changing frequency, so that the large-capacity barreled wire becomes an ideal choice for welding materials of the robot. In industrially developed countries, robot welding materials are mainly configured into barreled welding wires, and the robot welding materials sold in China, particularly flux-cored welding wires, are rarely packaged in barrels, because the processing precision and stability of the flux-cored welding wire production equipment in China are different from those of the flux-cored welding wire production equipment in foreign countries, the flux-cored welding wires are easy to twist and generate large stress in the forming, rolling and reducing processes, the phenomena of wire breakage, wire clamping, wire disorder and the like of the flux-cored welding wires are easy to occur in the barreling process, the barreling process is difficult, meanwhile, the phenomenon of unstable wire feeding of the barreled flux-cored welding wires is easy to occur in use, and the stability of the welding process is reduced.
In order to package the gas shielded flux-cored wire in a barrel smoothly, the stress of the wire should be reduced as much as possible. The diameter of the gas shielded flux-cored wire is small, the reducing amount in the rolling and drawing process is large, and large stress is easily generated; meanwhile, due to the precision and stability of domestic flux-cored wire equipment, the welding wire can also be twisted or rotated in the production and manufacturing process, the stress of the welding wire is further increased, the twisting direction of the welding wire is consistent with the direction of the welding wire wound around the barrel during barrel filling, the difficulty of barrel filling of the welding wire is increased, and the phenomena of wire breakage, wire clamping and wire disorder are caused. In comparison, in the processes of forming, rolling and drawing, the seam of the flux-cored wire with a foreign famous brand is always positioned at the upper end of the flux-cored wire, and the flux-cored wire is rarely twisted, which is one of the main reasons for the barrel-packed flux-cored wire to be a welding material for foreign robots.
Therefore, the stress on-line control method for the flux-cored wire for the steel structure is developed, the stress generated in the production process of the flux-cored wire is reduced, the phenomena of wire disorder, wire clamping, wire breaking and the like of the flux-cored wire during barreling or using are avoided, and the method has important significance for promoting the engineering application of the efficient automatic welding technology.
Disclosure of Invention
The invention aims to provide a stress on-line control method suitable for a flux-cored wire for a steel structure, which reduces stress generated in the production process of the flux-cored wire, enables the flux-cored wire to realize large-capacity barreled packaging, and is particularly suitable for a robot welding process.
In order to achieve the purpose, the invention adopts the following technical scheme:
a stress on-line control method suitable for a flux-cored wire for a steel structure comprises the following steps:
(1) after the flux-cored wire is rolled, drawn and reduced to reach the size of a finished product, the flux-cored wire passes through a high-frequency induction coil;
(2) setting the walking speed of the flux-cored wire in the coil and high-frequency induction heating current parameters, rapidly heating the outer steel belt of the flux-cored wire to the stress relief temperature range of 500-650 ℃, and performing online stress relief treatment on the flux-cored wire;
(4) carrying out surface cleaning on the flux-cored wire subjected to online stress reduction treatment;
(5) the flux-cored wire barreled package is suitable for the flux-cored wire final product with large-capacity barreled package.
The flux-cored wire is a gas shielded flux-cored wire, and the thickness of an outer steel belt of the flux-cored wire is 0.1-0.2 mm.
Wherein the high-frequency induction heating parameters are 1800A-2400A of current and 60 kHz-120 kHz of frequency.
Wherein the walking speed of the flux-cored wire in the high-frequency induction coil is 8-12 m/s.
The high-frequency induction coil uniformly surrounds the periphery of the flux-cored wire, and the axial length of the high-frequency induction coil is 800-1200 mm.
The invention has the beneficial effects that:
the method starts from the post-treatment angle of the flux-cored wire, carries out on-line high-frequency induction heating on the flux-cored wire reaching the finished product specification, rapidly heats the surface of the flux-cored wire to the stress eliminating temperature range of the external steel belt, and then carries out air cooling to reduce the internal stress generated in the rolling and drawing process of the steel belt. According to the invention, by controlling the walking speed of the flux-cored wire and the high-frequency induction heating current parameters, the heat generated by the high-frequency induction coil is only concentrated on the outer steel belt of the flux-cored wire, the stress of the steel belt is reduced, the physical and chemical properties of the flux-cored wire powder are not influenced, the capacity of the flux-cored wire adapting to barreled packaging is improved, and the purpose of improving the wire feeding stability of the flux-cored wire is achieved.
The invention takes the reduction of the stress of the flux-cored wire as a starting point, reduces the phenomena of wire breakage, wire jamming, wire disorder and the like when the flux-cored wire is packaged in a barrel, improves the capability of adapting to the barrel-shaped package, realizes the large-capacity barrel packaging of the gas-shielded flux-cored wire, has the weight of a single barrel package up to 250kg, and is particularly suitable for the robot automatic welding with long operation time.
Drawings
Fig. 1 is a schematic structural diagram of a high-frequency induction coil heating flux-cored wire.
Detailed Description
The invention is further illustrated with reference to the following figures and examples. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
The invention provides a stress on-line control method suitable for a flux-cored wire for a steel structure, which reduces stress generated by torsion of the flux-cored wire in rolling and drawing processes by rapidly heating an external steel belt of the flux-cored wire through on-line high-frequency induction, so that the flux-cored wire is more suitable for large-capacity barreled packaging, the replacement frequency of the flux-cored wire in the welding process is reduced, and the welding production efficiency is improved.
Fig. 1 is a schematic structural view of a high-frequency induction coil heating flux-cored wire. When the method is implemented, the high-frequency induction coil 2 is uniformly surrounded around the flux-cored wire 1, namely, the flux-cored wire 1 passes through the high-frequency induction coil 2, and the axial length L of the high-frequency induction coil is 800mm-1200 mm. When the device works, high-frequency current flows to the copper tube which is wound into a ring shape, strong magnetic beams with instantly changed polarity are generated in the coil, the flux-cored wire is placed in the coil, the magnetic beams penetrate through the flux-cored wire in the coil, the outer steel belt of the flux-cored wire correspondingly generates great eddy current in the direction opposite to the heating current, the outer steel belt of the flux-cored wire with the thickness of about 0.1-0.2 mm generates resistance heat, the resistance heat is rapidly heated, the outer steel belt is rapidly heated to the stress relief temperature range (500-650 ℃) and then is cooled with the flux-cored wire in air, and the purposes of reducing rolling and drawing stress are achieved.
The specific embodiment of the invention is as follows:
the external steel strip of the flux-cored wire is a low-carbon steel strip with the specification of 0.9mm multiplied by 13.5 mm; the flux-cored wire powder mainly comprises rutile, bauxite, quartz, silicon-manganese alloy, cryolite, electrolytic manganese metal, aluminum-magnesium alloy, zircon sand, ferrotitanium, iron powder and the like, and the powder is prepared according to the following proportion and is uniformly mixed for later use.
The medicinal powder comprises the following components in percentage by weight: 31.5 to 33.5 percent of rutile, 2.5 to 3.0 percent of bauxite, 2.0 to 3.0 percent of quartz, 18.5 to 20.0 percent of silicon-manganese alloy, 1.0 to 2.0 percent of cryolite, 1.5 to 2.0 percent of electrolytic manganese metal, 1.0 to 2.0 percent of aluminum-magnesium alloy, 3.0 to 4.0 percent of sintered potassium titanate, 1.5 to 2.0 percent of zircon sand, 1.0 to 2.0 percent of ferrotitanium and the balance of iron powder.
Rolling the external low-carbon steel strip into a U shape, and filling the mixed medicinal powder into the U-shaped groove; after the U-shaped groove is closed, multi-pass rolling and drawing reducing are carried out until the diameter of the flux-cored wire is 1.0 mm-1.2 mm, and the thickness of the steel strip is about 0.1 mm-0.2 mm.
Introducing the flux-cored wire into a high-frequency induction heating device, and performing online stress reduction treatment on the flux-cored wire, wherein the walking speed of the flux-cored wire in a coil is 8-12 m/s, the current of high-frequency induction heating is 1800-2400A, and the current frequency is 60-120 kHz.
And cleaning the surface of the flux-cored wire subjected to stress reduction by online high-frequency induction heating to obtain a final product of the flux-cored wire suitable for large-capacity barreled packaging.
The examples of the invention are as follows:
the composition of the powder used in examples 1-4: 32.0 percent of rutile, 3.0 percent of bauxite, 2.5 percent of quartz, 19.0 percent of silicon-manganese alloy, 1.5 percent of cryolite, 2.0 percent of electrolytic manganese metal, 1.5 percent of aluminum-magnesium alloy, 3.5 percent of sintered potassium titanate, 1.5 percent of zircon sand, 1.5 percent of ferrotitanium and the balance of iron powder.
Example 1
The flux-cored wire is prepared by rolling a low-carbon steel strip with the specification of 0.9mm multiplied by 13.5mm into a U shape by adopting the powder composed of the components, uniformly mixing the powder, filling the powder into the U-shaped groove, carrying out seaming, gradually drawing and reducing the diameter to 1.2mm, carrying out on-line stress control on the flux-cored wire by using on-line high-frequency induction heating, wherein the coil length is 800mm, the current is 1800A, the frequency is 60kHz, the walking speed of the flux-cored wire is 8m/s, and mechanically cleaning the flux-cored wire to obtain the flux-cored wire with the specification of 1.2 mm.
Example 2
The flux-cored wire is prepared by rolling a low-carbon steel strip with the specification of 0.9mm multiplied by 13.5mm into a U shape by adopting the medicinal powder consisting of the components, uniformly mixing the medicinal powder, filling the mixture into the U-shaped groove, seaming, gradually drawing and reducing the diameter to 1.2mm, then carrying out on-line stress control on the flux-cored wire by using on-line high-frequency induction heating, wherein the coil length is 800mm, the current is 2400A, the frequency is 60kHz, the walking speed of the flux-cored wire is 10m/s, and mechanically cleaning the flux-cored wire to obtain the flux-cored wire with the specification of 1.2 mm.
Example 3
The flux-cored wire is prepared by rolling a low-carbon steel strip with the specification of 0.9mm multiplied by 13.5mm into a U shape by adopting the powder composed of the components, uniformly mixing the powder, filling the powder into the U-shaped groove, carrying out seaming, gradually drawing and reducing the diameter to 1.0mm, carrying out on-line stress control on the flux-cored wire by using on-line high-frequency induction heating, wherein the coil length is 800mm, the current is 1800A, the frequency is 120kHz, the walking speed of the flux-cored wire is 10m/s, and mechanically cleaning the flux-cored wire to obtain the flux-cored wire with the specification of 1.0 mm.
Example 4
The flux-cored wire is prepared by rolling a low-carbon steel strip with the specification of 0.9mm multiplied by 13.5mm into a U shape by adopting the medicinal powder consisting of the components, uniformly mixing the medicinal powder, filling the mixture into the U-shaped groove, seaming, gradually drawing and reducing the diameter to 1.0mm, then carrying out on-line stress control on the flux-cored wire by using on-line high-frequency induction heating, wherein the coil length is 800mm, the current is 2400A, the frequency is 120kHz, the walking speed of the flux-cored wire is 12m/s, and mechanically cleaning the flux-cored wire to obtain the flux-cored wire with the specification of 1.0 mm.
Comparison of effects
250kg barreling comparative experiments are respectively carried out on flux-cored wires (without high-frequency induction heating stress relief) manufactured by the traditional process and examples (with different parameters for high-frequency induction heating stress relief), the barreling speed is 8m/s, and the statistics of the results are shown in table 1.
TABLE 1 statistics of high frequency stress relief flux cored wire barreling test
The results show that after the stress of the flux-cored wire is eliminated on line by adopting high-frequency induction heating, the smoothness of the barreling process of the flux-cored wire is obviously improved, and the effect of eliminating the stress on line can be improved by reasonable high-frequency parameter selection.
The stress on-line control method adopts high-frequency induction heating to eliminate stress on line, has simple operation and high reliability, can meet the requirement of high-capacity barreling of the flux-cored wire, and has obvious promotion effect on the application of the automatic welding technology of the robot.
Claims (3)
1. The stress on-line control method for the flux-cored wire for the steel structure is characterized by comprising the following steps of:
(1) rolling, drawing and reducing the flux-cored wire until the diameter of the flux-cored wire is 1.0-1.2 mm, the thickness of an outer layer steel belt is 0.1-0.2 mm, and then enabling the flux-cored wire to pass through a high-frequency induction coil;
(2) setting the walking speed and high-frequency induction heating parameters of the flux-cored wire in the coil, wherein the walking speed is 8-12 m/s, the high-frequency induction heating parameters are 1800-2400A of current and 60-120 kHz of frequency, rapidly heating an outer steel belt of the flux-cored wire to a stress relief temperature range of 500-650 ℃, and performing online stress relief treatment on the flux-cored wire;
(4) carrying out surface cleaning on the flux-cored wire subjected to online stress reduction treatment;
(5) the flux-cored wire barreled package is suitable for the flux-cored wire final product with large-capacity barreled package.
2. The method for controlling the stress of the flux-cored wire for the steel structure as claimed in claim 1, wherein the flux-cored wire is a gas shielded flux-cored wire.
3. The method for controlling the stress of the flux-cored wire for the steel structure as claimed in claim 1, wherein the high-frequency induction coil is uniformly wound around the flux-cored wire, and the axial length of the high-frequency induction coil is 800mm to 1200 mm.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191790A (en) * | 1997-02-27 | 1998-09-02 | 日铁溶接工业株式会社 | Process for manufacturing welding wire |
| TW402537B (en) * | 1997-08-12 | 2000-08-21 | Soudure Autogene Francaise | Process for manufacturing a flux-cored wire with recrystallization annealing |
| CN102310302A (en) * | 2011-09-08 | 2012-01-11 | 中国船舶重工集团公司第七二五研究所 | Manufacturing method of seamless flux-cored wire |
| CN105965171A (en) * | 2016-06-13 | 2016-09-28 | 武汉铁锚焊接材料股份有限公司 | Method and device for producing barreled seamless flux-cored wire used for high-strength steel |
| CN108367349A (en) * | 2015-12-18 | 2018-08-03 | 伊利诺斯工具制品有限公司 | Device and method for increasing material manufacturing welding wire |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104263898A (en) * | 2014-09-24 | 2015-01-07 | 河南科技大学 | Drawing and annealing method for flux cored wire production process |
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2019
- 2019-11-14 CN CN201911118062.1A patent/CN110863085B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191790A (en) * | 1997-02-27 | 1998-09-02 | 日铁溶接工业株式会社 | Process for manufacturing welding wire |
| TW402537B (en) * | 1997-08-12 | 2000-08-21 | Soudure Autogene Francaise | Process for manufacturing a flux-cored wire with recrystallization annealing |
| CN102310302A (en) * | 2011-09-08 | 2012-01-11 | 中国船舶重工集团公司第七二五研究所 | Manufacturing method of seamless flux-cored wire |
| CN108367349A (en) * | 2015-12-18 | 2018-08-03 | 伊利诺斯工具制品有限公司 | Device and method for increasing material manufacturing welding wire |
| CN105965171A (en) * | 2016-06-13 | 2016-09-28 | 武汉铁锚焊接材料股份有限公司 | Method and device for producing barreled seamless flux-cored wire used for high-strength steel |
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