CN1413797A - Expansion soldering method of aluminium-copper tube and active connection agent for the method and its making method - Google Patents
Expansion soldering method of aluminium-copper tube and active connection agent for the method and its making method Download PDFInfo
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- CN1413797A CN1413797A CN 02133238 CN02133238A CN1413797A CN 1413797 A CN1413797 A CN 1413797A CN 02133238 CN02133238 CN 02133238 CN 02133238 A CN02133238 A CN 02133238A CN 1413797 A CN1413797 A CN 1413797A
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Abstract
An expansion soldering method for the aluminium and copper pipes features use of an active connecting agent prepared from the active nanometer powder, water, organic cellulose and non-corrosion flux through mixing. Thes aid method includes such steps as machining the connected ends of aluminium and copper pipes into conic surfaces, coating the said active connecting agent on the conic surfaces, heating them and applying pressure to both ends of pipes to be soldered. Its advantages are low stress, soldering temp and pressure, and high compactness of soldered seam (up to more than 85%).
Description
Technical field: the present invention relates to the soldering connecting method of aluminium-copper tube, especially relating to no solder does not have the method for the quick brazed aluminum copper pipe of corrosion and is used for the active bridging agent of no solder of this method and the preparation method of this activity bridging agent.
Background technology: at present, air conditioner industry makes that the production cost is difficult to reduce owing to adopted a large amount of copper pipes on product.Be the target that people seek with aluminium for copper for many years, because the proportion of aluminium alloy is 2.7g/cm always
3, and the proportion of brass is 8.5g/cm
3, therefore will reduce product weight and cost effectively for copper with aluminium.But,, therefore to solve the problem that can aluminium, copper pipe link together between the two effectively for the key of copper with aluminium if will realize that fine and close to connect difficulty reliably bigger because aluminium, copper material physical property differs greatly.Though present conventional soldering interconnection technique has solved this problem, but because the effect of solder, brazing flux is to environmental protection, all cause certain harm to the operator, and have temperature height, big, the ineffective shortcoming of pressure, cause this conventional method for brazing not apply.
Summary of the invention: the present invention is the expansion method for brazing of a kind of aluminium-copper tube of development and active bridging agent and the method for making thereof that is used for this method, the stability that the viscosity that makes the active bridging agent of no solder have appropriateness is become reconciled makes brazing process speed fast, and it is little to produce stress, temperature required low, pressure is little.The active bridging agent of no solder of the present invention comprises following composition: active nano powder, non-corrosion type brazing flux, bonding agent, the part by weight of each composition close and are; Bonding agent: non-corrosion type brazing flux: active nano powder=(1～20): (1～5): (0～1), wherein the purity of active nano powder is 99.9%～100%, granularity is 20nm～100 μ m, when adopting granularity is that the active nano powder of 20nm～10 μ m is made into bridging agent, and its performance is better.Bonding agent is to be in harmonious proportion and to be made by water, organic cellulose, and the weight ratio of water and organic cellulose is 100: (0.1～5).The method for making of the active bridging agent of no solder of the present invention is: be that 99.9%～100% active particle is made the nanometer powder that granularity is 20nm～100 μ m through mechanical crushing or powder injection process with purity; Make bonding agent by water, organic cellulose mediation, the weight ratio of water and organic cellulose is 100: (0.1～5).Above two kinds of compositions and non-corrosion type brazing flux are mixed bonding agent: non-corrosion type brazing flux: active nano powder=(1～20): (1～5) by following part by weight relation: (0～1) makes it become the active bridging agent of no solder.The rapid expanding method for brazing of aluminum bronze insertion pipe of the present invention is: at first be processed into the conical surface 3 in the grafting joint of aluminum pipe 1 and copper pipe 2, to not have again on the faying face of the conical surface 3 that the active bridging agent 4 of solder is coated in aluminum pipe 1 and copper pipe 2 grafting joints, connect conventional brazing temperature heating then, P again exerts pressure at the two ends of two welded tubes in the time of heating process, make between aluminum pipe 1 and the copper pipe 2 and in brazing process, remain tight the contact, finish quick brazing process.The difference of the linear expansion coefficient of aluminum bronze makes between aluminum pipe 1 and the copper pipe 2 and keeps closely contacting when utilizing heating, and generation contacts pressure between faying face.In the time of in aluminum pipe 1 is inserted in copper pipe 2, the connection-peg of aluminum pipe 1 and copper pipe 2 is not processed the conical surface, the soldering of directly pegging graft.The thermal coefficient of expansion of aluminium produces contact pressure greater than the thermal coefficient of expansion of copper when utilizing heating between aluminum pipe 1 and copper pipe 2, realizes contact reaction brazing.Also can carry out the draw to copper pipe 2 and handle in the back of having pegged graft, and then soldering, to strengthen the closeness of contact of 2 of aluminum pipe 1 and copper pipes.The active bridging agent of no solder of the present invention has the viscosity of appropriateness, and the energy long preservation, can not react with any composition, can weld different metal, nonmetal, the stress that is produced is little, and welding temperature is low, pressure is little, and is less demanding to environment and specimen surface.The active bridging agent of no solder can adopt coating processes such as brushing, spraying, dipping to place on the composition surface of workpiece to be welded.Heating means can adopt methods such as flame heat, eddy-current heating and electric furnace heating.The active nano powder can react at a certain temperature with aluminum pipe and copper pipe, forms a kind of novel alloy between aluminum pipe and copper pipe, and brazing flux can be removed the oxide and the pollutant of aluminum pipe and copper pipe surface when reaching certain heating-up temperature.Quick method for brazing of the present invention is compared with the method for brazing of routine, has realized that the fine and close soldering of aluminium, copper two kinds of materials connects, and the compactness of brazed seam reaches more than 85%, and makes that soldering processes are simplified, the cost reduction.Reduce by 50% with aluminium copper substituting material cost, integrated cost reduces by 35%.
Description of drawings: Fig. 1 is the syndeton schematic diagram of aluminum pipe 1 and copper pipe 2 in the specific embodiment four, Fig. 2 is the syndeton schematic diagram of copper pipe 2 and aluminum pipe 1 in the specific embodiment five, Fig. 3 is the syndeton schematic diagram of copper pipe 2 and aluminum pipe 1 in the specific embodiment six, and Fig. 4 is the syndeton schematic diagram of aluminum pipe 1 and copper pipe 2 in the specific embodiment seven.
The specific embodiment one: the active bridging agent of no solder is made up of active nano powder, non-corrosion type brazing flux, bonding agent composition in the present embodiment, the part by weight relation of these compositions is: bonding agent: non-corrosion type brazing flux: active nano powder=(1～20): (1～2): (0.1～0.4), wherein the purity of active nano powder is 99.90～99.93%, granularity is that 20nm～10 μ m bonding agents are in harmonious proportion and are made by water, organic cellulose, and the weight ratio of water and organic cellulose is 100: (0.5～3).
The specific embodiment two: present embodiment and the specific embodiment one are different is that the purity of active nano powder is 99.93～99.96%, and granularity is 11nm～30 μ m; Each composition part by weight of the active bridging agent of no solder is: bonding agent: non-corrosion type brazing flux: active nano powder=(1～20): (2～4): (0.5～0.8).
The specific embodiment three: present embodiment and the specific embodiment one, two are different is that the purity of active nano powder is 99.96～99.99%, and granularity is 31nm～60 μ m; Each composition part by weight of the active bridging agent of no solder is: bonding agent: non-corrosion type brazing flux: active nano powder=(1～20): (4～5): (0.8～1).
The specific embodiment four: the quick method for brazing of the aluminium of present embodiment, copper insertion pipe is: at first aluminum pipe 1 is processed into outer single conical surface 3-1 with faying face 3 places of the grafting joint of copper pipe 2, and make aluminum pipe 1 at inboard, copper pipe 2 in the outside, spraying the active bridging agent 4 of no solder on the faying face 3, brazing temperature heating routinely then, heating time the P that exerts pressure at the two ends of soldered two pipes, make between aluminum pipe 1 and the copper pipe 2 and in brazing process, remain tight the contact, finish quick brazing process.
The specific embodiment five: present embodiment and the specific embodiment four are different be copper pipe 2 in the inboard, aluminum pipe 1 is in the outside.Other process is identical with the specific embodiment four.
The specific embodiment six: present embodiment and the specific embodiment four are different is that the faying face 3 of joint is processed into bipyramid face 3-2.Other process is identical with the specific embodiment four, five.
The specific embodiment seven: present embodiment and the specific embodiment four are different is in aluminum pipe 1 is inserted in copper pipe 2 time, and the connection-peg of aluminum pipe 1 and copper pipe 2 is not processed the conical surface, the soldering of directly pegging graft.
The specific embodiment eight: the difference of the present embodiment and the specific embodiment seven is also can carry out the draw to copper pipe 2 in the back of having pegged graft to handle, and then soldering.
Claims (10)
1, the active bridging agent of no solder, it is characterized in that it comprises following composition: active nano powder, non-corrosion type brazing flux, bonding agent, the part by weight of each composition close and are: bonding agent: non-corrosion type brazing flux: active nano powder=(1～20): (1～5): (0～1).
2, the active bridging agent of no solder according to claim 1, the purity that it is characterized in that the active nano powder is 99.9%～100%, granularity is 20nm～100 μ m.
3, the active bridging agent of no solder according to claim 1 is characterized in that bonding agent is in harmonious proportion and is made by water, organic cellulose, and the weight ratio of water and organic cellulose is 100: (0.1～5).
4, the active bridging agent of no solder according to claim 1, the purity that it is characterized in that the active nano powder is 99.92～99.98%, granularity is 20nm～10 μ m.
5, the method for making of the active bridging agent of no solder is characterized in that with purity being that to become granularity through mechanical crushing be the nanometer powder of 20nm～100 μ m for 99.9%～100% active particle; Make bonding agent by water, organic cellulose mediation, the weight ratio of water and organic cellulose is 100: (0.1～5), above two kinds of compositions and non-corrosion type brazing flux are mixed by following part by weight relation, bonding agent: non-corrosion type brazing flux: active nano powder=(1～5): (1～20): (0～1) makes it become the active bridging agent of no solder.
6, the expansion method for brazing of aluminium-copper tube, it is characterized in that at first being processed into the conical surface (3) in the grafting joint of aluminum pipe (1) and copper pipe (2), to not have again on the faying face of the conical surface (3) that the active bridging agent of solder (4) is coated in aluminum pipe (1) and copper pipe (2) grafting joint, brazing temperature heating routinely then, P exerts pressure at the two ends of two welded tubes in the time of heating process, make between aluminum pipe (1) and the copper pipe (2) and in brazing process, remain tight the contact, finish quick brazing process.
7, the expansion method for brazing of aluminium-copper tube according to claim 6 is characterized in that the faying face (3) of the grafting joint of aluminum pipe (1) and copper pipe (2) is located to be processed into outer single conical surface (3-1), and make aluminum pipe (1) in the outside, copper pipe (2) is in the inboard.
8, the expansion method for brazing of aluminium-copper tube according to claim 6 is characterized in that faying face (3) is processed into bipyramid face (3-2).
9, the expansion method for brazing of aluminium-copper tube according to claim 6, when it is characterized in that in aluminum pipe (1) is inserted in copper pipe (2), the connection-peg of aluminum pipe (1) and copper pipe (2) is not processed the conical surface, the soldering of directly pegging graft.
10, the method for brazing of aluminium-copper tube according to claim 9 is characterized in that in the back of having pegged graft copper pipe (2) being carried out the draw handles, and then soldering.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02133238 CN1413797A (en) | 2002-10-21 | 2002-10-21 | Expansion soldering method of aluminium-copper tube and active connection agent for the method and its making method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02133238 CN1413797A (en) | 2002-10-21 | 2002-10-21 | Expansion soldering method of aluminium-copper tube and active connection agent for the method and its making method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004113014A3 (en) * | 2003-06-25 | 2005-06-02 | Behr Gmbh & Co Kg | Fluxing agent for soldering metal components |
| CN101319741B (en) * | 2007-06-04 | 2011-05-04 | 左铁军 | Plug-in type copper aluminum pipe welded joint and method of producing the same |
| CN102642076A (en) * | 2012-04-20 | 2012-08-22 | 绍兴亨特铝热交换技术有限公司 | Welding method of copper-aluminum pipe joint |
| WO2013189206A1 (en) * | 2012-06-20 | 2013-12-27 | 哈尔滨工业大学 | Laser guided nano-brazing method for reinforced aluminum composite material having high volume fraction silicon carbide particles |
| CN103567647A (en) * | 2012-07-20 | 2014-02-12 | 汉中新环干式变压器有限责任公司 | Conductor thick-wall long pipe welding method |
| CN112719500A (en) * | 2021-01-06 | 2021-04-30 | 成立航空股份有限公司 | Vacuum brazing method for conical surface structure |
-
2002
- 2002-10-21 CN CN 02133238 patent/CN1413797A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004113014A3 (en) * | 2003-06-25 | 2005-06-02 | Behr Gmbh & Co Kg | Fluxing agent for soldering metal components |
| CN100457374C (en) * | 2003-06-25 | 2009-02-04 | 贝洱两合公司 | Fluxing agent for soldering metal components |
| US8002905B2 (en) * | 2003-06-25 | 2011-08-23 | Behr Gmbh & Co. Kg | Fluxing agent for soldering metal components |
| US8557055B2 (en) | 2003-06-25 | 2013-10-15 | Behr Gmbh & Co. Kg | Fluxing agent for soldering metal components |
| CN101319741B (en) * | 2007-06-04 | 2011-05-04 | 左铁军 | Plug-in type copper aluminum pipe welded joint and method of producing the same |
| CN102642076A (en) * | 2012-04-20 | 2012-08-22 | 绍兴亨特铝热交换技术有限公司 | Welding method of copper-aluminum pipe joint |
| WO2013189206A1 (en) * | 2012-06-20 | 2013-12-27 | 哈尔滨工业大学 | Laser guided nano-brazing method for reinforced aluminum composite material having high volume fraction silicon carbide particles |
| CN103567647A (en) * | 2012-07-20 | 2014-02-12 | 汉中新环干式变压器有限责任公司 | Conductor thick-wall long pipe welding method |
| CN112719500A (en) * | 2021-01-06 | 2021-04-30 | 成立航空股份有限公司 | Vacuum brazing method for conical surface structure |
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