CN111151860A - High-frequency hot-melting welding device and welding method - Google Patents
High-frequency hot-melting welding device and welding method Download PDFInfo
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- CN111151860A CN111151860A CN202010046113.0A CN202010046113A CN111151860A CN 111151860 A CN111151860 A CN 111151860A CN 202010046113 A CN202010046113 A CN 202010046113A CN 111151860 A CN111151860 A CN 111151860A
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- 238000003466 welding Methods 0.000 title claims abstract description 67
- 238000002844 melting Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 75
- 230000008018 melting Effects 0.000 claims abstract description 45
- 239000002184 metal Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 239000007769 metal material Substances 0.000 claims abstract description 19
- 230000006698 induction Effects 0.000 claims description 13
- 238000004857 zone melting Methods 0.000 claims description 13
- 230000007704 transition Effects 0.000 claims description 10
- 239000012943 hotmelt Substances 0.000 claims description 9
- 238000004321 preservation Methods 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 7
- 230000007547 defect Effects 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
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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
- B23K13/00—Welding by high-frequency current heating
- B23K13/01—Welding by high-frequency current heating by induction heating
- B23K13/02—Seam welding
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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
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a high-frequency hot-melting welding device and a welding method, and the welding device comprises a welding part and a welding control system, wherein the welding part comprises a charging barrel, the outside of the charging barrel is sequentially divided into a first heat treatment area, a hot melting area and a second heat treatment area, a first group of high-frequency coils are wound on the first heat treatment area, a second group of high-frequency coils are wound on the hot melting area, a third group of high-frequency coils are wound on the second heat treatment area, the welding control system comprises a single chip microcomputer, and the signal output end of the single chip microcomputer is respectively connected with the first group of high-frequency coils, the second group of high-frequency coils and the third; meanwhile, the invention also relates to a high-frequency hot melting welding method; according to the invention, the current is controlled according to the output signal of the singlechip, different currents are supplied to the high-frequency coil at different times, so that different heating temperatures are provided for the metal element to be welded, the metal material to be welded can be subjected to hot melting and heat treatment, and the welding quality of the metal material can be greatly improved.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a high-frequency hot-melting welding device and a welding method.
Background
Metal welding is a manufacturing or sculpting process to join metals; during the welding process, the workpiece and the welding material are melted or not melted, and a material direct connection welding seam is formed. The existing common welding has many defects which are mainly divided into two aspects, namely internal defects which are reflected by the fact that air holes and slag are formed in the internal part, cracks are formed in the internal part, the internal part is not welded through, the internal part is not fused and the like; the other is an external defect, and the welding positions of two metals may have undercut, welding beading, arc craters, surface pores, slag inclusion, surface cracks and unreasonable welding positions. In addition, the metal is welded by adopting a common welding mode, and the welded part always has performance difference with the original metal material, so that most common welding has lower quality.
CN208006275U discloses a high frequency hot melt welding machine, including high frequency power supply generating device and handheld transducer, handheld transducer connects high frequency power supply generating device, high frequency power supply generating device installs high frequency contravariant switching system, auxiliary power supply system, control system and cooling system including the installation panel on the installation panel, handheld transducer includes safety cover, end cover, heat insulating mattress, high frequency heating inductance coils, magnetic core, casing, high frequency oscillation electric capacity, high-speed radiator fan and rifle switch.
Therefore, those skilled in the art have made efforts to develop a high-frequency thermal welding apparatus and a high-frequency thermal welding method having high welding quality.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a high-frequency thermal fusion welding apparatus and a high-frequency thermal fusion welding method with high welding quality.
In order to achieve the above object, the present invention provides a high frequency hot melt welding apparatus, comprising a welding part and a welding control system,
the welding part comprises a charging barrel, the outside of the charging barrel is sequentially divided into a first heat treatment area, a hot melting area and a second heat treatment area, a first group of high-frequency coils are wound on the first heat treatment area, a second group of high-frequency coils are wound on the hot melting area, and a third group of high-frequency coils are wound on the second heat treatment area;
the welding control system comprises a single chip microcomputer, and a signal output end of the single chip microcomputer is respectively connected with the first group of high-frequency coils, the second group of high-frequency coils and the third group of high-frequency coils through a current processing circuit.
Preferably, the outer surface of the charging barrel is provided with an insulating and heat-insulating layer, and the first group of high-frequency coils, the second group of high-frequency coils and the third group of high-frequency coils are wound on the outer surface of the insulating and heat-insulating layer.
Preferably, a heat treatment zone temperature sensor and a hot melting zone temperature sensor are embedded in the insulating heat-insulating layer, the heat treatment zone temperature sensors are correspondingly arranged in the first heat treatment zone and the second heat treatment zone, and the hot melting zone temperature sensors are correspondingly arranged in the hot melting zone;
the signal output ends of the heat treatment area temperature sensor and the hot melting area temperature sensor are connected with the signal input end of the single chip microcomputer.
Preferably, the first group of high-frequency coils, the second group of high-frequency coils and the third group of high-frequency coils are zone-melting induction coils, cooling water pipes are arranged in the zone-melting induction coils, and thermistor temperature sensors are arranged on the outer surfaces of the cooling water pipes;
the signal output ends of the thermistor temperature sensors are connected with the signal input end of the single chip microcomputer.
Preferably, the thermistor temperature sensor is connected with the signal input end of the singlechip through a two-stage amplifying circuit.
Preferably, the signal input end of the singlechip is provided with a manual input module.
Preferably, a buzzer is arranged at the signal output end of the single chip microcomputer.
Preferably, the signal output end of the singlechip is provided with a display.
Preferably, the front end of the first heat treatment area and the rear end of the third heat treatment area are both provided with heat preservation transition areas;
the heat preservation transition area is formed by sleeving an insulating layer outside the charging barrel.
A high-frequency hot-melt welding method comprises the following steps:
1) a second group of high-frequency coils of the hot melting area are connected, and the output current of the second group of high-frequency coils is controlled by the single chip microcomputer to enable the metal materials to be welded in the second group of high-frequency coils to reach the hot melting temperature; applying constant pressure to two ends of the metal material to be welded until the hot melting is finished and the heat treatment is finished;
2) and after the metal material to be welded is melted, the power is cut off, the metal material is cooled to 1100 +/-20 ℃, the first group of high-frequency coils and the third group of high-frequency coils in the heat treatment area are switched on, the current of the second group of high-frequency coils is reduced through the control of the single chip microcomputer, the current of the second group of high-frequency coils is the same as the current passing through the first group of high-frequency coils and the third group of high-frequency coils, the metal at two ends to be welded reaches the heat treatment temperature, the metal is.
The zone-melting induction coil is innovatively divided into three sections, the three sections are respectively divided into a hot-melting zone and a heat treatment zone, the three sections of zone-melting induction coils are electrified in a time-sharing mode by matching with a single chip microcomputer, the corresponding zone-melting induction coil outside the hot-melting zone is electrified firstly, after the zone-melting induction coil is subjected to hot melting, the current is controlled by the single chip microcomputer, the temperature of the hot-melting zone is reduced, the temperature of the hot-melting zone reaches the heat treatment temperature, meanwhile, the zone-melting induction coil outside the heat treatment zone is electrified to reach the heat treatment temperature, metal welded at two ends is subjected to heat treatment, and the mechanical properties of the welding part and the transition part of the metal material are consistent; the process performance and the mechanical property of the welding part are enhanced; the method of the invention can avoid the external defect and the internal defect of the common welding.
Drawings
FIG. 1 is a first functional block diagram of the present invention;
FIG. 2 is a functional block diagram of the present invention II;
FIG. 3 is a schematic view of the structure of a welded part in the present invention;
in the figure: 1-a weld; 11-a barrel; 11 a-a first heat treatment zone; 11 b-a hot melt zone; 11 c-a second heat treatment zone; 13-a first set of high frequency coils; 14-a second set of high frequency coils; 15-a third set of high frequency coils; 16-insulating and heat-insulating layer; 17-thermal treatment zone temperature sensor; 18-a hot melt zone temperature sensor; 19-heat preservation transition zone;
2-a welding control system; 21-a single chip microcomputer; 22-current processing circuitry; 22 a-a rectifying and filtering circuit; 22 b-a resonant inverter circuit; 23-a manual input module; 24-a buzzer; 25-a display; 26-thermistor temperature sensor;
3-a power supply; 4-metal material to be welded.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, wherein the terms "upper", "lower", "left", "right", "inner", "outer", and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular manner, and thus should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1
As shown in fig. 1 to 3, a high-frequency thermal welding apparatus includes a welding part 1 and a welding control system 2; the welding part comprises a charging barrel 11, the outside of the charging barrel 11 is sequentially divided into a first heat treatment area 11a, a hot melting area 11b and a second heat treatment area 11c, a first group of high-frequency coils 13 are wound on the first heat treatment area, a second group of high-frequency coils 14 are wound on the hot melting area, and a third group of high-frequency coils 15 are wound on the second heat treatment area;
the welding control system 2 comprises a single chip microcomputer 21, the single chip microcomputer 21 is connected with the power supply 3, and a signal output end of the single chip microcomputer 21 is respectively connected with the first group of high-frequency coils 13, the second group of high-frequency coils 14 and the third group of high-frequency coils 15 through a current processing circuit 22. Specifically, the current processing circuit 22 is composed of a rectifying filter circuit 22a and a resonant inverter circuit 22 b. The alternating voltage with the frequency of 50Hz and 220V can be changed into the direct voltage of 380V through the rectifying and filtering circuit. And then a resonance inverter circuit consisting of the excitation coil L, the resonance capacitor C and the IGBT converts direct current into high-frequency alternating current with the frequency of 20 KHz-30 KHz, the rapidly changing current can generate a high-speed magnetic field when passing through the coil, and countless small eddy currents can be generated when magnetic lines of force in the magnetic field pass through metals to be welded, so that the metals to be welded can be rapidly heated by themselves.
Since Q = I x R x T, Q represents heat, I-represents the current passed by the high-frequency coil, R-represents the resistance of the high-frequency coil, and T-represents the time of continuous heating. The invention supplies current to the high-frequency coil by the singlechip in different time periods, can perform hot melting and heat treatment on the metal to be welded in different time periods, can effectively improve the welding quality, and can also ensure the mechanical property of the welded metal material.
The outer surface of the charging barrel 11 is provided with an insulating and heat-insulating layer 16, and the insulating and heat-insulating layer 16 is a high-temperature-resistant insulating and heat-insulating material which is prepared by taking ceramic fibers as main raw materials and adopting a wet forming process; the first group of high-frequency coils 13, the second group of high-frequency coils 14 and the third group of high-frequency coils 15 are wound around the outer surface of the insulating thermal insulation layer 16. The heat energy generated by the metal to be welded is sealed and locked in the charging barrel by arranging the insulating and heat-insulating layer 16, and meanwhile, the coil wrapped on the outer layer can keep the functions of low temperature and insulation, so that the service life and the safety of the equipment are improved.
A heat treatment zone temperature sensor 17 and a hot melting zone temperature sensor 18 are embedded in the insulating layer 16, the heat treatment zone temperature sensors 17 are correspondingly arranged in the first heat treatment zone 11a and the second heat treatment zone 11c, and the hot melting zone temperature sensors 18 are correspondingly arranged in the hot melting zone 11 b;
the signal output ends of the heat treatment area temperature sensor 17 and the hot melting area temperature sensor 18 are connected with the signal input end of the single chip microcomputer. The temperature sensor 17 of the heat treatment area is arranged to detect and judge whether the temperature of the heat treatment area reaches a heat treatment critical temperature value, and when the temperature reaches the heat treatment critical temperature value, the single chip microcomputer stops electrifying the first group of high-frequency coils 13 or/and the second group of high-frequency coils 14 or/and the third group of high-frequency coils 15; the hot melting area temperature sensor 18 is used for detecting and judging whether the temperature of the hot melting area reaches the critical temperature value of the metal hot melting, and when the temperature of the metal hot melting area reaches the critical temperature value, the single chip microcomputer stops electrifying the second group of high-frequency coils 14. In addition, a timing module is also arranged in the single chip microcomputer and used for recording hot melting time and heat treatment time; when the timing module reaches the set hot melting heating time, the single chip microcomputer controls the current, the high-frequency coil hot melting stage is finished, and the high-frequency coil hot melting stage enters a heat treatment stage; when the timing module reaches the set heating time of the heat treatment, the singlechip cuts off the power of the high-frequency coil, and the welding is finished.
The first group of high-frequency coils 13, the second group of high-frequency coils 14 and the third group of high-frequency coils 15 are zone-melting induction coils, and cooling water pipes are arranged in the zone-melting induction coils to prevent the zone-melting induction coils from being burnt or broken down due to too high temperature; the outer surface of the cooling water pipe is provided with a thermistor temperature sensor; the signal output ends of the thermistor temperature sensors are connected with the signal input end of the single chip microcomputer.
The temperature of the cooling water can be conveniently detected, and when the water temperature signal transmitted by the thermistor temperature sensor reaches a certain critical temperature set in the single chip microcomputer, the single chip microcomputer can automatically stop electrifying the corresponding zone-melting induction coil.
The thermistor temperature sensor is connected with the signal input end of the singlechip through a two-stage amplifying circuit. The accuracy of water temperature detection can be improved through the two-stage amplification circuit.
A manual input module 23 is arranged at the signal input end of the singlechip; being convenient for artifical manual start-up welding control system 2, more preferably, manual input module 23 includes switch module and parameter input module, through parameter input module, can set up corresponding hot melt temperature value and heat treatment temperature value according to weld metal's attribute.
A buzzer 24 is arranged at the signal output end of the singlechip; when the single chip microcomputer stops electrifying because of receiving signals of the thermistor temperature sensor or/and the heat treatment area temperature sensor 17 or/and the hot melting area temperature sensor 18, the power between the buzzer 24 and the power supply is switched on, and the buzzer 24 gives an alarm.
The signal output end of the singlechip is provided with a display 25; the single chip microcomputer processes the temperature signals transmitted back by the thermistor temperature sensor, the processing area temperature sensor 17 and the melting area temperature sensor 18, then processes the temperature signals, and displays the temperature value obtained by final processing on the display, more preferably, the display comprises a temperature display module and a time display module, the signal input end of the time display module is connected with the signal output end of the timing module in the single chip microcomputer, and the time display module is used for displaying the time for carrying out hot melting and heat treatment on metal, so that a worker can observe the hot melting temperature and time and the heat treatment temperature and time and know the whole welding process.
The front end of the first heat treatment area 11a and the rear end of the third heat treatment area 11c are both provided with a heat preservation transition area 19; the heat preservation transition area 19 is formed by sleeving an insulating layer outside the charging barrel. The heat preservation transition zone is mainly used for keeping heat energy from losing, and is also used for transition temperature difference among a welding part, a heat treatment part and a part which is not subjected to any treatment so as to ensure that the metallographic structure of the metal material to be welded is consistent with that of the raw material before being welded.
A high-frequency hot-melt welding method comprises the following steps:
1) in the early stage, the second group of high-frequency coils 14 in the hot melting area are electrified through the control of a single chip microcomputer, and the metal materials to be welded in the area reach the hot melting temperature; applying constant pressure to two ends of the metal material to be welded until the heat treatment is finished (eliminating necking phenomenon caused by metal stress shrinkage after hot melting); more preferably, a timing module is further arranged in the single chip microcomputer and used for recording hot melting time and heat treatment time;
2) and after the metal material to be welded is melted, the power is cut off, the metal material is cooled to 1100 +/-20 ℃, a first group of high-frequency coils and a third group of high-frequency coils in a heat treatment area are switched on, the current of a second group of high-frequency coils 14 is reduced through the control of a single chip microcomputer, the current of the second group of high-frequency coils 14 is the same as the current of the first group of high-frequency coils and the current of the third group of high-frequency coils, the metal at two ends to be welded reaches the heat treatment temperature, namely, the metal is subjected to a heat treatment normalizing process (generally, a workpiece is heated to be 30-50 ℃ above Ac3 or Accm, after the temperature is kept for a period of time, the specific normalizing process.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A high-frequency hot-melt welding device is characterized in that: comprises a welding part (1) and a welding control system (2);
the welding part comprises a charging barrel (11), and the outside of the charging barrel (11) is sequentially divided into a first heat treatment area (11 a), a hot melting area (11 b) and a second heat treatment area (11 c); a first group of high-frequency coils (13) are wound on the first heat treatment area; a second group of high-frequency coils (14) are wound on the hot melting zone; a third group of high-frequency coils (15) are wound on the second heat treatment area;
the welding control system (2) comprises a single chip microcomputer (21), and a signal output end of the single chip microcomputer (21) is connected with a first group of high-frequency coils (13), a second group of high-frequency coils (14) and a third group of high-frequency coils (15) through a current processing circuit (22).
2. The high frequency thermal welding apparatus according to claim 1, wherein: an insulating and heat-insulating layer (16) is arranged on the outer surface of the charging barrel (11); the first group of high-frequency coils (13), the second group of high-frequency coils (14) and the third group of high-frequency coils (15) are wound on the outer surface of the insulating layer (16).
3. The high frequency thermal welding apparatus according to claim 2, wherein: a heat treatment area temperature sensor (17) and a hot melting area temperature sensor (18) are embedded in the insulating layer (16); the heat treatment zone temperature sensors (17) are correspondingly arranged in the first heat treatment zone (11 a) and the second heat treatment zone (11 c); the hot melting zone temperature sensor (18) is correspondingly arranged in the hot melting zone (11 b);
and the signal output ends of the heat treatment area temperature sensor (17) and the hot melting area temperature sensor (18) are connected with the signal input end of the singlechip.
4. The high frequency thermal welding apparatus according to claim 2, wherein: the first group of high-frequency coils (13), the second group of high-frequency coils (14) and the third group of high-frequency coils (15) are all zone-melting induction coils; a cooling water pipe is arranged in the zone-melting induction coil, and a thermistor temperature sensor (26) is arranged on the outer surface of the cooling water pipe;
and the signal output ends of the thermistor temperature sensors are connected with the signal input end of the singlechip.
5. The high frequency thermal welding apparatus according to claim 4, wherein: the thermistor temperature sensor is connected with the signal input end of the singlechip through a two-stage amplifying circuit.
6. The high frequency thermal welding apparatus according to claim 1, wherein: and a manual input module (23) is arranged at the signal input end of the singlechip.
7. The high frequency thermal welding apparatus according to claim 1, wherein: and a buzzer (24) is arranged at the signal output end of the singlechip.
8. The high frequency thermal welding apparatus according to claim 1, wherein: and a signal output end of the singlechip is provided with a display (25).
9. The high frequency thermal welding apparatus according to claim 1, wherein: the front end of the first heat treatment area (11 a) and the rear end of the second heat treatment area (11 c) are both provided with a heat preservation transition area (19);
the heat preservation transition area (19) is formed by sleeving an insulating layer outside the charging barrel.
10. A high-frequency hot-melt welding method is characterized in that: the method comprises the following steps:
1) a second group of high-frequency coils (14) of the hot melting area are connected, and the output current of the second group of high-frequency coils is controlled by the singlechip to ensure that the metal material (4) to be welded in the second group of high-frequency coils reaches the hot melting temperature; applying constant pressure to two ends of the metal material to be welded until the heat treatment is finished;
2) after the metal material (4) to be welded is melted, the power is cut off, the metal material is cooled to 1100 +/-20 ℃, and the first group and the third group of high-frequency coils in the heat treatment area are switched on; the current of the second group of high-frequency coils (14) is reduced through the control of the singlechip, so that the current of the second group of high-frequency coils (14) is the same as the passing current of the first group of high-frequency coils and the third group of high-frequency coils; and (4) enabling the metal at the two ends to be welded to reach the heat treatment temperature, keeping the temperature, and finishing the heat treatment.
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| CN202010046113.0A CN111151860A (en) | 2020-01-16 | 2020-01-16 | High-frequency hot-melting welding device and welding method |
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| CN208087687U (en) * | 2017-12-11 | 2018-11-13 | 马鞍山钢铁股份有限公司 | A kind of heating device for strip steel weld joint heat treatment |
| CN211680495U (en) * | 2020-01-16 | 2020-10-16 | 陈嘉毅 | High-frequency hot-melt welding device |
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2020
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|---|---|---|---|---|
| CN101786213A (en) * | 2010-03-26 | 2010-07-28 | 哈尔滨工业大学 | Method for controlling generation of cold crack in welding process based on electromagnetic induction heating |
| KR20120010429A (en) * | 2010-07-26 | 2012-02-03 | 유상록 | The apparatus and method of double metal connecting with high frequency induce heating |
| CN103484802A (en) * | 2013-09-16 | 2014-01-01 | 西北工业大学 | Preparation method for obtaining kilogram-grade high temperature alloy undercooled melt |
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