CN102451940A - Method for continuously soldering aluminum alloy heat exchanger of gas water heater - Google Patents
Method for continuously soldering aluminum alloy heat exchanger of gas water heater Download PDFInfo
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- CN102451940A CN102451940A CN2010105507279A CN201010550727A CN102451940A CN 102451940 A CN102451940 A CN 102451940A CN 2010105507279 A CN2010105507279 A CN 2010105507279A CN 201010550727 A CN201010550727 A CN 201010550727A CN 102451940 A CN102451940 A CN 102451940A
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Abstract
The invention discloses a method for continuously soldering an aluminum alloy heat exchanger of a gas water heater; the technical process comprises preparation of solder materials, and degreasing, cleaning, assembling, spraying and drying for a workpiece; the workpiece is conveyed to a soldering chamber by using a continuous transport line, and the soldering chamber is provided with five temperature regions. When the temperature of the soldering chamber reaches 400 DEG C, nitrogen protection equipment is opened; when the workpiece is heated to the temperature of a soldering flux melting point, the nitrogen enters the soldering chamber, welding transmission is started, the five temperature regions are started and the temperature is controlled between 610 DEG C and 618 DEG C. When the temperature in a first region reaches 610 DEG C, the workpiece enters the soldering chamber. When the temperature is over 558 DEG C, the soldering flux begins to melt. The soldered workpiece is cooled to the room temperature by using a water-cooled shade chamber and an air-cooled chamber, and the whole soldering process is finished. With adoption of the full-automatic continuous soldering process, the aluminum alloy heat exchanger of the gas water heater is soldered automatically and continuously, the rate of the continuous soldering finished products reaches 98%, and the conservation of resources, the stable quality of products and no pollution to the operating environment are achieved.
Description
Technical field
The present invention relates to the method for Al-alloy heat exchanger continuous braze welding of method, particularly a kind of gas heater of the Al-alloy heat exchanger soldering of gas heater.
Background technology
The inner heat exchanger of common gas heater generally adopts the copper material processing and fabricating, the costing an arm and a leg of copper material, and than great, poor processability, processing environmental pollution.The heat exchanger of gas heater adopts the aluminum alloy materials making to have superiority, and the price of aluminum alloy materials is lower, light specific gravity, and processing characteristics is good.The key technology that aluminum alloy materials is made the inner heat exchanger of gas heater is the welding procedure between each workpiece of aluminum alloy materials.Aluminum current alloy material welding procedure be the position full-filling that need weld each workpiece of aluminum alloy materials than the low-melting solder of aluminum alloy materials, insert heating in the hot room, make solder fusing back be welded into one with each element of aluminum alloy materials.The welding procedure of general aluminum alloy materials is employed in intermittently soldering in the hot room.But because gas heater Al-alloy heat exchanger complex structure, intermittently the qualification rate of soldering only accounts for about 85%, and intermittently the soldering power consumption is big, and the quality of product is unstable, and working environment has pollution.
Summary of the invention
The objective of the invention is shortcoming, develop a kind of method of Al-alloy heat exchanger continuous braze welding of gas heater to the Al-alloy heat exchanger soldering at intermittence of above-mentioned gas heater.Adopt full-automatic continous way soldering processes, make the automatic continuous braze welding of Al-alloy heat exchanger of gas heater, the continuous braze welding yield rate reaches more than 98%, economize on resources, and constant product quality, operation environment safety is pollution-free.
The objective of the invention is to realize by following technological process:
1, solder preparation
A, brazing flux
Brazing flux adopts potassium fluoroaluminate salt mixture, the KAlF by 76%
4With 24% K
2AlF
5H
2O forms.
B, preparation sheet bulge loop solder
The solder of the outlet pipe of the Al-alloy heat exchanger of gas heater and little U pipe, large U type pipe and the soldering of case shell adopts the ring-type solder, and the height of bulge loop is the 1.3-1.6 millimeter.Coat brazing flux to above-mentioned ring-type solder.
2, workpiece degreasing
Remove the grease of surface of the work before the soldering, but obtain the surface of water-wet, so that evenly apply solder and soldering flux.Fortune barrel, case shell and little U pipe, large U type pipe, radiating tube clean in supersonic wave cleaning machine, also can in debinding furnace, adopt the heated-air drying oil removing.
3, workpiece assembling
The Al-alloy heat exchanger of gas heater is made up of case shell, fortune barrel, dististyle, little U pipe, big U pipe, heat exchanging fin, radiating tube and outlet pipe.The material of case shell is the mother metal of the AA3003 of 8% AA4343 composite and 92%.The material model of little U pipe and big U pipe is AA1100.To transport barrel and be enclosed within the case shell outside; The fortune barrel must be close to the surface of case shell; The little U pipe of strap shape bulge loop solder is installed on the radiating tube at case shell top with big U pipe, guarantees that the fit clearance between sheet bulge loop solder and little U pipe, big U pipe, three workpiece of heat exchanging fin meets drawing requirement.Be inserted in the port of outlet pipe to the sheet bulge loop solder of coated with flux, the port of bulge loop and outlet pipe injects the radiating tube of aluminum alloy heat exchanger simultaneously.
4, workpiece spray
Al-alloy heat exchanger workpiece after the above-mentioned assembling is placed on continuous the company on the supply line, gets into spray district spray.The water temperature of spray is that 20～30 ℃, time are 10～15 seconds.
5, workpiece is dry
Workpiece gets into dry section from the spray district, and kiln temperatures is 180～220 ℃, makes the moisture content of brazing flux exsiccation and removal surface of the work.
6, soldering
Al-alloy heat exchanger workpiece behind the above-mentioned spray moved to braze chamber in continuous the company on the supply line, and braze chamber is provided with five warm areas.When the braze chamber temperature reaches 400 ℃; Open nitrogen protection equipment, nitrogen gas purity requires to reach 99.998%, and nitrogen gets into braze chamber from that section that workpiece is warmed up to the brazing flux melting temperature; Import and export direction to braze chamber and discharge, the braze chamber import and export is isolated by big flow nitrogen.Start the welding transmission, beat is 600～760r/min.Start five warm areas, temperature is controlled at 610～618 ℃.Start and respectively distinguish blower fan.When first district's temperature reached 610 ℃, workpiece got into braze chamber.When temperature surpassed 558 ℃, brazing flux began fusion, made the position between little U pipe, big U pipe, the radiating tube remove the oxide-film on aluminum material surface, and the fusion between 605～610 ℃ of sheet bulge loop solder.Liquid solder after little U pipe, big U pipe, the radiating tube fusion produces the capillarity fusion together.Fortune barrel and case shell also carry out local fusing at this moment.
7, workpiece is come out of the stove
Workpiece is reduced to room temperature through water-cooling cover chamber and air cooling chamber after the soldering, accomplishes whole brazing process.Remove frock clamp, workpiece gets into the leak detection link.
The present invention adopts full-automatic continous way soldering processes, makes the automatic continuous braze welding of Al-alloy heat exchanger of gas heater, and the continuous braze welding yield rate reaches 98%, economize on resources, and constant product quality, operating environment is pollution-free.
Description of drawings
Fig. 1 is each workpiece assembling soldering master TV structure sketch map of Al-alloy heat exchanger of gas heater of the present invention;
Fig. 2 is that each workpiece of Al-alloy heat exchanger of gas heater of the present invention assembles right structural representation.
Among the figure: 1, fortune barrel, 2, the case shell, 3, dististyle, 4, little U type pipe, 5, the large U type pipe, 6, heat exchanging fin, 7, sheet bulge loop solder, 8, radiating tube, 9, outlet pipe, 10, water inlet, 11, delivery port.
The specific embodiment
In conjunction with accompanying drawing and embodiment, describe method of the present invention in detail.
Embodiment:
The objective of the invention is to realize by following technological process:
1, solder preparation
A, brazing flux
Brazing flux adopts potassium fluoroaluminate salt mixture, the KAlF by 76%
4With 24% K
2AlF
5H
2O forms.
B, preparation sheet bulge loop solder
The outlet pipe 9 of the Al-alloy heat exchanger of gas heater and little U pipe 4, large U type pipe 5 adopt ring-type solder 7 with the solder of case shell 2 solderings, and the height of bulge loop is the 1.3-1.6 millimeter.Coat brazing flux to above-mentioned ring-type solder 7.
2, workpiece degreasing
Remove the grease of surface of the work before the soldering, but obtain the surface of water-wet, so that evenly apply solder and soldering flux.Fortune barrel 1, case shell 2 and little U pipe 4, large U type pipe 5, radiating tube 8 clean in supersonic wave cleaning machine, also can in debinding furnace, adopt the heated-air drying oil removing.
3, workpiece assembling
The Al-alloy heat exchanger of gas heater is made up of case shell 2, fortune barrel 1, dististyle 3, little U pipe 4, big U pipe 5, heat exchanging fin 6, radiating tube 8 and outlet pipe 9.The material of case shell is the mother metal of the AA3003 of 8% AA4343 composite and 92%.The material model of little U pipe 4 and big U pipe 5 is AA1100.To transport barrel 1 and be enclosed within case shell 2 outsides, the lower end of fortune barrel 1 is a water inlet 10.The lower end of water pipe 9 is delivery ports 11.The two ends of heat exchanging fin 6 are fixed on the dististyle 3.Fortune barrel 1 must be close to the surface of case shell 2, otherwise causes failure welding, influences the heat exchange effect.The little U pipe 4 of strap shape bulge loop solder 7 is installed on the radiating tube 8 at case shell top with big U pipe 5, guarantees that the fit clearance between sheet bulge loop solder 7 and little U pipe 4, big U pipe 5,6 three workpiece of heat exchanging fin meets drawing requirement.Be inserted in the port of outlet pipe 9 to the sheet bulge loop solder 7 of coating the pricker powder, the port of bulge loop and outlet pipe 9 injects the radiating tube 8 of aluminum alloy heat exchanger simultaneously.
4, workpiece spray
Al-alloy heat exchanger workpiece after the above-mentioned assembling is placed on continuous the company on the supply line, gets into spray district spray.The water temperature of spray is that 20～30 ℃, time are 10～15 seconds.
5, workpiece is dry
Workpiece gets into dry section from the spray district, and dry furnace temperature is 180～220 ℃, makes the moisture content of brazing flux exsiccation and removal surface of the work.
6, soldering
Al-alloy heat exchanger workpiece behind the above-mentioned spray moved to braze chamber in continuous the company on the supply line, and braze chamber is provided with five warm areas.When the braze chamber temperature reaches 400 ℃; Open nitrogen protection equipment, nitrogen gas purity requires to reach 99.998%, and nitrogen gets into braze chamber from that section that workpiece is warmed up to the brazing flux melting temperature; Import and export direction to braze chamber and discharge, the braze chamber import and export is isolated by big flow nitrogen.Start the welding transmission, beat is 600～760r/min.Start five warm areas, temperature is controlled at 610～618 ℃.Start and respectively distinguish blower fan.When first district's temperature reached 610 ℃, workpiece got into braze chamber.When temperature surpassed 558 ℃, brazing flux began fusion, made the position between little U pipe 4, big U pipe 5, the radiating tube 8 remove the oxide-film on aluminum material surface, and 7 fusions between 605～610 ℃ of sheet bulge loop solder.Little U manages 4, U pipe 5, the liquid solder of radiating tube 8 after fusion produce the capillarity fusion greatly.Fortune barrel 1 also carries out local fusing at this moment with case shell 2.
7, workpiece is come out of the stove
Workpiece is reduced to room temperature through water-cooling cover chamber and air cooling chamber after the soldering, accomplishes whole brazing process.Remove frock clamp, workpiece gets into the leak detection link.
Claims (1)
1. the method for the Al-alloy heat exchanger continuous braze welding of gas heater, it is characterized in that: the method for the Al-alloy heat exchanger continuous braze welding of gas heater realizes by following technological process:
(1), solder preparation
A, brazing flux
Brazing flux adopts potassium fluoroaluminate salt mixture, the KAlF by 76%
4With 24% K
2AlF
5H
2O forms;
B, preparation sheet bulge loop solder
The outlet pipe of the Al-alloy heat exchanger of gas heater (9), little U pipe (4), large U type pipe (5) adopt sheet bulge loop solder (7) with the solder of case shell (2) soldering; The flaky aluminum solder alloy once strikes out the sheet bulge loop solder (7) that a side has bulge loop, coats brazing flux to above-mentioned sheet bulge loop solder (7);
(2), workpiece degreasing
Fortune barrel (1), case shell (2) and little U pipe (4), large U type pipe (5), radiating tube (8) clean in supersonic wave cleaning machine, also can in debinding furnace, adopt the heated-air drying oil removing;
(3), workpiece assembling
The Al-alloy heat exchanger of gas heater is made up of case shell (2), dististyle (3), fortune barrel (1), little U pipe (4), big U pipe (5), heat exchanging fin (6), radiating tube (8) and outlet pipe (9); Fortune barrel (1) is enclosed within case shell (2) outside; Fortune barrel (1) must be close to the surface of case shell (2); The little U pipe (4) and the big U pipe (5) of strap shape bulge loop solder (7) are installed on the radiating tube (8) at case shell top; The sheet bulge loop solder (7) of coating welding powder is inserted in the port of outlet pipe (9), and the port of bulge loop and outlet pipe (9) injects the radiating tube (8) of aluminum alloy heat exchanger simultaneously;
(4), workpiece spray
Al-alloy heat exchanger workpiece after the above-mentioned assembling is placed on continuous the company on the supply line, gets into spray district spray, and the water temperature of spray is that 20～30 ℃, time are 10～15 seconds;
(5), workpiece is dry
Workpiece gets into dry section from the spray district, and kiln temperatures is 180～220 ℃, makes the moisture content of brazing flux exsiccation and removal surface of the work;
(6), soldering
Al-alloy heat exchanger workpiece behind the above-mentioned spray moved to braze chamber in continuous the company on the supply line, and braze chamber is provided with five warm areas, when the braze chamber temperature reaches 400 ℃; Open nitrogen protection equipment, nitrogen gas purity requires to reach 99.998%, and nitrogen gets into braze chamber from that section that workpiece is warmed up to the brazing flux melting temperature; Import and export direction to braze chamber and discharge, the braze chamber import and export is isolated by big flow nitrogen, start the welding transmission; Beat is 600～760r/min, starts five warm areas, and temperature is controlled at 610～618 ℃; Start and respectively distinguish blower fan, when first district's temperature reached 610 ℃, workpiece got into braze chamber; When temperature surpassed 558 ℃, brazing flux began fusion, made the position between little U pipe (4), big U pipe (5), the radiating tube (8) remove the oxide-film on aluminum material surface; And sheet bulge loop solder (7) fusion between 605～610 ℃, little U pipe (4), big U manage (5), radiating tube (8) liquid solder after fusion and produce the capillarity fusion, and fortune barrel (1) also carries out local fusing at this moment with case shell (2);
(7), workpiece is come out of the stove
Workpiece is reduced to room temperature through water-cooling cover chamber and air cooling chamber after the soldering, accomplishes whole brazing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105507279A CN102451940A (en) | 2010-10-26 | 2010-10-26 | Method for continuously soldering aluminum alloy heat exchanger of gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105507279A CN102451940A (en) | 2010-10-26 | 2010-10-26 | Method for continuously soldering aluminum alloy heat exchanger of gas water heater |
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|---|---|
| CN102451940A true CN102451940A (en) | 2012-05-16 |
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| CN2010105507279A Pending CN102451940A (en) | 2010-10-26 | 2010-10-26 | Method for continuously soldering aluminum alloy heat exchanger of gas water heater |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935531A (en) * | 2012-11-07 | 2013-02-20 | 柳州市浩瀚汽车空调部件制造有限公司 | Condenser core brazing method |
| CN103486772A (en) * | 2013-06-04 | 2014-01-01 | 浙江三可热交换系统有限公司 | Production method of subway train air conditioner micro-channel heat exchanger |
| CN103658119A (en) * | 2013-12-18 | 2014-03-26 | 常熟市天河机械设备制造有限公司 | Collecting pipe aqueous solution ultrasonic cleaning process of heat exchanger |
| CN106152617A (en) * | 2015-03-27 | 2016-11-23 | 河南新科隆电器有限公司 | A kind of soldering formula evaporator for refrigerator and manufacture method thereof |
| CN106216789A (en) * | 2016-08-24 | 2016-12-14 | 广西易德科技有限责任公司 | A kind of welding procedure of two-layer composite cooling water tank |
| CN108994412A (en) * | 2018-09-12 | 2018-12-14 | 山东中茂散热器有限公司 | It is integrally formed welding method |
| CN110369818A (en) * | 2019-08-05 | 2019-10-25 | 大连爱碧克空调配件有限公司 | Aluminium alloy post welding method |
| CN112827732A (en) * | 2021-02-10 | 2021-05-25 | 盐城市苏文机械有限公司 | Energy-saving and environment-friendly degreasing and brazing flux spraying drying device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3971501A (en) * | 1975-04-09 | 1976-07-27 | Alcan Research And Development Limited | Method of brazing aluminum |
| CN101000218A (en) * | 2006-12-29 | 2007-07-18 | 大连百川散热器科技有限公司 | Bus, heavy, duty truck radiation brazed of water chamber and main piece and its brazing technology |
| CN201483168U (en) * | 2009-07-30 | 2010-05-26 | 广东增城市基业汽车空调有限公司 | Lamellar brazing ring for brazing aluminum alloy pipe of household water heater |
-
2010
- 2010-10-26 CN CN2010105507279A patent/CN102451940A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3971501A (en) * | 1975-04-09 | 1976-07-27 | Alcan Research And Development Limited | Method of brazing aluminum |
| CN101000218A (en) * | 2006-12-29 | 2007-07-18 | 大连百川散热器科技有限公司 | Bus, heavy, duty truck radiation brazed of water chamber and main piece and its brazing technology |
| CN201483168U (en) * | 2009-07-30 | 2010-05-26 | 广东增城市基业汽车空调有限公司 | Lamellar brazing ring for brazing aluminum alloy pipe of household water heater |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935531A (en) * | 2012-11-07 | 2013-02-20 | 柳州市浩瀚汽车空调部件制造有限公司 | Condenser core brazing method |
| CN103486772A (en) * | 2013-06-04 | 2014-01-01 | 浙江三可热交换系统有限公司 | Production method of subway train air conditioner micro-channel heat exchanger |
| CN103658119A (en) * | 2013-12-18 | 2014-03-26 | 常熟市天河机械设备制造有限公司 | Collecting pipe aqueous solution ultrasonic cleaning process of heat exchanger |
| CN106152617A (en) * | 2015-03-27 | 2016-11-23 | 河南新科隆电器有限公司 | A kind of soldering formula evaporator for refrigerator and manufacture method thereof |
| CN106216789A (en) * | 2016-08-24 | 2016-12-14 | 广西易德科技有限责任公司 | A kind of welding procedure of two-layer composite cooling water tank |
| CN108994412A (en) * | 2018-09-12 | 2018-12-14 | 山东中茂散热器有限公司 | It is integrally formed welding method |
| CN110369818A (en) * | 2019-08-05 | 2019-10-25 | 大连爱碧克空调配件有限公司 | Aluminium alloy post welding method |
| CN112827732A (en) * | 2021-02-10 | 2021-05-25 | 盐城市苏文机械有限公司 | Energy-saving and environment-friendly degreasing and brazing flux spraying drying device |
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Application publication date: 20120516 |