CN101905362A - Method for welding thin-wall steel tube and thin steel plate under constant temperature condition - Google Patents
Method for welding thin-wall steel tube and thin steel plate under constant temperature condition Download PDFInfo
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- CN101905362A CN101905362A CN2010102456148A CN201010245614A CN101905362A CN 101905362 A CN101905362 A CN 101905362A CN 2010102456148 A CN2010102456148 A CN 2010102456148A CN 201010245614 A CN201010245614 A CN 201010245614A CN 101905362 A CN101905362 A CN 101905362A
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Abstract
The invention relates to a method for welding thin-wall steel tube and thin steel plate under constant temperature condition. The thin-wall steel tube and thin steel plate which are about to be welded are respectively provided, so as to form an assembled unit; the assembled unit is placed into a band type nitrogen hydrogen protective atmosphere continuous brazing furnace, copper brazing filler material is melted under constant temperature condition, the melted copper brazing filler material flows into the gap between the thin-wall tube and the thin steel plate, and the melted copper brazing filler material is solidified, thus completing the welding of thin-wall steel tube and thin steel plate. The welding method of the invention avoids that the thin-wall steel tube is burned through, admirable product rate of welding pieces can be greatly improved, welding quality is stable, production efficiency is 3-5 times of manual operation, and labour intensity is reduced, thus the method is especially applicable to large batch production.
Description
Technical field
The invention belongs to welding technology field, relate to a kind of method that thin-wall steel tube and sheet metal are welded mutually, be specifically related to welding thin-wall steel tube and steel-sheet method under a kind of constant temperature.
Background technology
The wall thickness of thin-wall steel tube is smaller or equal to 0.7mm, steel-sheet thickness is smaller or equal to 1.5mm, under a lot of situations, above-mentioned thin-wall steel tube and sheet metal need be welded together, traditional welding method is: manually use oxycetylene flame melting copper solder, and weld thin-wall steel tube and sheet metal with the copper solder of this fusing.There is following shortcoming in this method: 1) the workpiece inequality of being heated, easily thin-wall steel tube is burnt, and cause the acceptance rate of workpiece very low; 2) easily produce defectives such as pore and leakage weldering, weldquality instability; 3) the surface of the work oxidation is serious, and presentation quality is poor; 4) production efficiency is low, is not suitable for production in enormous quantities; 5) labor strength is big, work under bad environment.
Summary of the invention
The purpose of this invention is to provide welding thin-wall steel tube and steel-sheet method under a kind of constant temperature, workpiece is heated evenly, and avoids burning thin-wall steel tube, can increase substantially the acceptance rate and the production efficiency of weldment, reduces labour intensity.
The technical solution adopted in the present invention is that constant temperature is welding thin-wall steel tube and steel-sheet method down, carries out according to the following steps:
Step 1: get thin-wall steel tube to be welded 1 and sheet metal 2 respectively, form sub-assembly;
Step 2: the sub-assembly that forms in the step 1 is put into belt nitrogen hydrogen protective atmosphere continuous braze welding stove; melting copper solder under the constant temperature; copper solder stream after the fusing is oozed and be filled in the slit between thin-wall steel tube 1 and the sheet metal 2; after the liquid copper solder solidifies, finish the welding of thin-wall steel tube 1 and sheet metal 2.
Nitrogen hydrogen flowing quantity in the described step 2 in the belt nitrogen hydrogen protective atmosphere continuous braze welding stove is 0.4 ± 0.05 cubic metre/hour.
Thermostat temperature is 1125 ℃ ± 5 ℃ in the described step 2.
Welding method of the present invention heats copper solder, thin-wall steel tube and sheet metal simultaneously under constant temperature, make the fusing of copper solder, thin-wall steel tube and sheet metal are welded, and workpiece is heated evenly, and has avoided burning of thin-wall steel tube, improved the acceptance rate of workpiece, production efficiency is manual 3～5 times, is fit to produce in enormous quantities, has reduced labour intensity, weldquality is stable, defectives such as pore-free and leakage weldering.
Description of drawings
Accompanying drawing is the schematic diagram that adopts the weldment of the inventive method welding thin-wall steel tube and sheet metal formation.
Among the figure, 1. thin-wall steel tube, 2. sheet metal.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
When adopting existing method welding thin-wall steel tube 1 and sheet metal 2, the artificial oxycetylene flame that uses melts the copper solder, and with the copper solder of this fusing welding thin-wall steel tube 1 and sheet metal 2, make workpiece, in welding process, the inequality owing to be heated is easily burnt thin-wall steel tube 1, causes the acceptance rate of workpiece very low; Also easily produce defectives such as pore and leakage weldering, simultaneously, the surface of the work oxidation is serious, and presentation quality is poor; Production efficiency is low, and labour intensity is big.
In order to overcome the defective of above-mentioned existing welding method, the invention provides a kind of welding thin-wall steel tube and steel-sheet method, this method is carried out according to the following steps:
Step 1: get thin-wall steel tube to be welded 1 and sheet metal 2 respectively, thin-wall steel tube 1 is penetrated appointed positions on the sheet metal 2, form sub-assembly;
Step 2: the sub-assembly that step 1 obtains is put into belt nitrogen hydrogen protective atmosphere continuous braze welding stove; the flow of nitrogen hydrogen is 0.4 ± 0.05 cubic metre/hour in this soldering oven; under 1125 ℃ ± 5 ℃ constant temperature; the copper solder is molten into liquid; the equal uniform flow of this liquid oozes and is filled in the slit between thin-wall steel tube 1 and the sheet metal 2, and workpiece cools off gradually in transport process, and liquid copper solder solidify out into is solid-state; thin-wall steel tube 1 and sheet metal 2 are welded together, finish welding process.Form weldment as shown in drawings, this weldment is welded by orthogonal thin-wall steel tube 1 and sheet metal 2,
Welding method of the present invention is in belt nitrogen hydrogen protective atmosphere (0.4 ± 0.05 cubic metre/hour of gas flow) continuous braze welding stove; under 1125 ℃ ± 5 ℃ constant temperature; copper solder, thin-wall steel tube and sheet metal are heated simultaneously; the low liquid that is molten into of fusing point owing to the copper solder; all uniform flow oozes and is filled in the slit between thin-wall steel tube and the sheet metal, is cooled gradually at the workpiece that transmits, and the liquid state of copper solder becomes solid-state; thin-wall steel tube and sheet metal are welded together, finish weldment.
Welding method of the present invention is welded thin-wall steel tube 1 and sheet metal 2 under constant temperature, form weldment, in the welding process; thin-wall steel tube 1 and sheet metal 2 are heated evenly, the phenomenon of having avoided thin-wall steel tube 1 to be burnt can significantly improve the acceptance rate of welding work pieces; weldquality is stable; production efficiency is manual 3～5 times, has reduced labour intensity, is fit to very much produce in enormous quantities.
Get thin-wall steel tube to be welded 1 and sheet metal 2 respectively, thin-wall steel tube 1 is penetrated appointed positions on the sheet metal 2, form sub-assembly; This sub-assembly is put into belt nitrogen hydrogen protective atmosphere continuous braze welding stove; the flow of nitrogen hydrogen is 0.35 cubic metre/hour in this soldering oven; under 1120 ℃ constant temperature; the copper solder is molten into liquid; the equal uniform flow of this liquid oozes and is filled in the slit between thin-wall steel tube 1 and the sheet metal 2, and workpiece cools off gradually in transport process, and liquid copper solder solidify out into is solid-state; thin-wall steel tube 1 and sheet metal 2 are welded together, finish welding process.
Get thin-wall steel tube to be welded 1 and sheet metal 2 respectively, thin-wall steel tube 1 is penetrated appointed positions on the sheet metal 2, form sub-assembly; This sub-assembly is put into belt nitrogen hydrogen protective atmosphere continuous braze welding stove; the flow of nitrogen hydrogen is 0.4 cubic metre/hour in this soldering oven; under 1125 ℃ constant temperature; the copper solder is molten into liquid; the equal uniform flow of this liquid oozes and is filled in the slit between thin-wall steel tube 1 and the sheet metal 2, and workpiece cools off gradually in transport process, and liquid copper solder solidify out into is solid-state; thin-wall steel tube 1 and sheet metal 2 are welded together, finish welding process.
Embodiment 3
Get thin-wall steel tube to be welded 1 and sheet metal 2 respectively, thin-wall steel tube 1 is penetrated appointed positions on the sheet metal 2, form sub-assembly; This sub-assembly is put into belt nitrogen hydrogen protective atmosphere continuous braze welding stove; the flow of nitrogen hydrogen is 0.45 cubic metre/hour in this soldering oven; under 1130 ℃ constant temperature; the copper solder is molten into liquid; the equal uniform flow of this liquid oozes and is filled in the slit between thin-wall steel tube 1 and the sheet metal 2, and workpiece cools off gradually in transport process, and liquid copper solder solidify out into is solid-state; thin-wall steel tube 1 and sheet metal 2 are welded together, finish welding process.
Claims (3)
1. a constant temperature welds thin-wall steel tube and steel-sheet method down, it is characterized in that this method is carried out according to the following steps:
Step 1: get thin-wall steel tube to be welded (1) and sheet metal (2) respectively, form sub-assembly;
Step 2: the sub-assembly that forms in the step 1 is put into belt nitrogen hydrogen protective atmosphere continuous braze welding stove; melting copper solder under the constant temperature; copper solder stream after the fusing is oozed and be filled in the slit between thin-wall steel tube (1) and the sheet metal (2); after the liquid copper solder solidifies, finish the welding of thin-wall steel tube (1) and sheet metal (2).
2. according to the described welding method of claim 1, it is characterized in that the hydrogen flowing quantity in the described step 2 in the belt nitrogen hydrogen protective atmosphere continuous braze welding stove is 0.4 ± 0.05 cubic metre/hour.
3. according to the described welding method of claim 1, it is characterized in that thermostat temperature is 1125 ℃ ± 5 ℃ in the described step 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102456148A CN101905362A (en) | 2010-08-03 | 2010-08-03 | Method for welding thin-wall steel tube and thin steel plate under constant temperature condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102456148A CN101905362A (en) | 2010-08-03 | 2010-08-03 | Method for welding thin-wall steel tube and thin steel plate under constant temperature condition |
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| CN101905362A true CN101905362A (en) | 2010-12-08 |
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| CN2010102456148A Pending CN101905362A (en) | 2010-08-03 | 2010-08-03 | Method for welding thin-wall steel tube and thin steel plate under constant temperature condition |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2104723U (en) * | 1991-11-15 | 1992-05-20 | 上海汽车配件厂 | Soldering hammer for tube core hole plate and core tube of heat exchanger |
| US20030143460A1 (en) * | 2002-01-30 | 2003-07-31 | Hiroaki Yoshida | Battery |
| JP2004108741A (en) * | 2002-09-20 | 2004-04-08 | Daikin Ind Ltd | Heat exchanger and its manufacturing method |
| JP2004122208A (en) * | 2002-10-04 | 2004-04-22 | Yokohama Rubber Co Ltd:The | Brazing method of member and connecting structure of container using the method |
| CN1629597A (en) * | 2004-07-15 | 2005-06-22 | 浙江银轮机械股份有限公司 | Connection method for tube plate and pipe joint of tube-shell/tube-sheet type heat exchanger |
| CN1891389A (en) * | 2005-09-23 | 2007-01-10 | 深圳市宝安联华实业有限公司 | Method for realizing brazing in metal straight pipe, and its special apparatus |
| CN1930441A (en) * | 2004-03-17 | 2007-03-14 | 昭和电工株式会社 | Heat exchanger header tank and heat exchanger comprising same |
| CN201407945Y (en) * | 2009-04-21 | 2010-02-17 | 卢秉威 | Welding structure of heat exchanging tube and tube plate |
-
2010
- 2010-08-03 CN CN2010102456148A patent/CN101905362A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2104723U (en) * | 1991-11-15 | 1992-05-20 | 上海汽车配件厂 | Soldering hammer for tube core hole plate and core tube of heat exchanger |
| US20030143460A1 (en) * | 2002-01-30 | 2003-07-31 | Hiroaki Yoshida | Battery |
| JP2004108741A (en) * | 2002-09-20 | 2004-04-08 | Daikin Ind Ltd | Heat exchanger and its manufacturing method |
| JP2004122208A (en) * | 2002-10-04 | 2004-04-22 | Yokohama Rubber Co Ltd:The | Brazing method of member and connecting structure of container using the method |
| CN1930441A (en) * | 2004-03-17 | 2007-03-14 | 昭和电工株式会社 | Heat exchanger header tank and heat exchanger comprising same |
| CN1629597A (en) * | 2004-07-15 | 2005-06-22 | 浙江银轮机械股份有限公司 | Connection method for tube plate and pipe joint of tube-shell/tube-sheet type heat exchanger |
| CN1891389A (en) * | 2005-09-23 | 2007-01-10 | 深圳市宝安联华实业有限公司 | Method for realizing brazing in metal straight pipe, and its special apparatus |
| CN201407945Y (en) * | 2009-04-21 | 2010-02-17 | 卢秉威 | Welding structure of heat exchanging tube and tube plate |
Non-Patent Citations (2)
| Title |
|---|
| STANLEY YOKELL等: "列管式换热器管子与管板的连接", 《化工设备与管道》 * |
| 余行春: "紫铜管与低碳钢的钎焊", 《焊接》 * |
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Application publication date: 20101208 |