CN101274389A - Copper-aluminum joint pressure welding technique - Google Patents
Copper-aluminum joint pressure welding technique Download PDFInfo
- Publication number
- CN101274389A CN101274389A CNA2008100281692A CN200810028169A CN101274389A CN 101274389 A CN101274389 A CN 101274389A CN A2008100281692 A CNA2008100281692 A CN A2008100281692A CN 200810028169 A CN200810028169 A CN 200810028169A CN 101274389 A CN101274389 A CN 101274389A
- Authority
- CN
- China
- Prior art keywords
- welding
- copper
- pipe
- aluminum
- copper pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
The invention relates to a pressure welding technique of a copper and aluminum joint, which is characterized by steps of: the blanking of a copper pipe and an aluminum pipe, the removal of burr and the washing of the surface of the copper pipe with acid; welding: a welding machine, an upper clamping mould and a lower clamping mould are adjusted; the copper pipe and the aluminum pipe are respectively clamped between the upper clamping mould and the lower clamping mould, the two ports for welding are extruded out of the clamping mould, the ends of the copper pipe and the aluminum pipe to be welded are heated to the temperature of about 420 to 540 DEG C and applied with the upsetting force of 0.4 to 0.8Mpa so as to cause the close contact of the welding surface of the copper pipe and the welding surface of the aluminum pipe, radial plastic deformation is generated by pressure, metal flashes are formed and a welding line is formed by the closely contacted pure metals, therefore, the welding process is finished; detecting welding beadings, removing residues and external burr; leak-checking: detecting whether the welded pipe has leakage by an air pressure test; drying and leak-checking with helium. The invention has simple technique and can reduce production cost and enhance production efficiency; since the oxidized film of the contact surface of the copper pipe and the aluminum pipe are damaged and extruded during pressure-increasing and deforming, the welded joint can be purified with good welding quality, no leakage, no deformation and long service life.
Description
Technical field
What the present invention relates to is a kind of copper-aluminum joint pressure welding technique.
Background technology
Because the fusing point of copper is 1083 degrees centigrade, the fusing point of aluminium is 660 degrees centigrade, and the surface of aluminium also can natural generation oxide-film.Because refrigeration pipe has the cleanliness factor requirement, this layer oxide-film can not be removed with the method for adding auxiliary agent, also be difficult to remove with physical method, and the fusing point of this layer oxide-film reaches 2000 degrees centigrade, these three different fusing points cause copper and aluminium welding to connect very easily to form rosin joint even do not weld.Traditional copper Al pipe butt welding method is to adopt stored energy welding and friction welding (FW), by applying the welding auxiliary agent, can realize that also copper and aluminium welding connects, but these methods can only be finished copper Al pipe butt welding more than 1.0 millimeters; Reduce wall thickness and will increase the welding seam leakage probability, this method can't be applied in wall thickness to be had only in the air conditioner connecting pipe of 0.6-0.8mm, and its complex manufacturing, and production efficiency is low, the production cost height.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and a kind of production process that reduced is provided, can weld wall thickness is the copper aluminum pipe of 0.6-0.8mm, production efficiency height, welding back copper aluminum pipe do not leak, indeformable, a kind of copper-aluminum joint pressure welding technique of long service life.
In order to achieve the above object, the present invention is achieved in that its a kind of copper-aluminum joint pressure welding technique, is characterised in that step is as follows:
1. blanking copper pipe and aluminum pipe, burring carries out pickling to copper pipe surface;
2. welding:
A, adjust welding machine and clamp mould up and down;
B, copper pipe and aluminum pipe are clamped in respectively in the upper and lower clamp mould, the two-port of welding is stretched out outside the clamp mould, copper pipe and aluminum pipe end to be welded are heated to about 420～540 ℃, apply the upsetting force of 0.4～0.8MPa then, make the copper pipe solder side reach tight and contact, produce radial plastic deformation, form the metal overlap by pressure with the Al pipe butt welding face, closely the pure metal of contact forms weld seam, finishes welding process;
3. examine overlap, remove residue;
4. remove outer burr;
5. whether qualified with air pressure test leak detection;
6. oven dry;
7. helium leak check.
Described copper pipe is to adopt the TP2 oxygen-free copper pipe, and described aluminum pipe is to adopt 1060 pure aluminum tubes or 3003 alloy aluminum pipes.
Behind welding sequence, copper-aluminium joint is carried out through hole, remove outer burr.
Adopt heat-shrink tube to carry out integral protection to aluminum pipe and copper-aluminium joint after the helium leak check operation.
Described copper, aluminum pipe can carry out dock welding or plug-in type welding.The present invention's advantage compared with prior art is, it is that a kind of outer plus-pressure makes metal produce intense plastic strain and forms the welding method of joint, during pressurizing and deformation, the oxide-film of copper pipe and aluminum pipe contact-making surface is destroyed and be extruded, can purify welding point, be the copper aluminum pipe of 0.6-0.8mm with the welding wall thickness.The Pressure Welder process has reduced production process owing to do not use any welding auxiliary agent, has reduced production cost; The main technologic parameters of welding sequence determines that by die size equipment is simple, thus easy operating, welding quality stable, the production efficiency height, cost is low; Without solder flux, joint can not cause corrosion.Joint area tensile strength and compression strength after copper and aluminium welding connects all reach standard, and high temperature resistance, high pressure are indeformable, do not leak long service life.
Description of drawings
Fig. 1 is the welding schematic diagram of the embodiment of the invention one;
Fig. 2 is a schematic diagram behind the copper pipe, Al pipe butt welding of the embodiment of the invention one;
Fig. 3 is the welding schematic diagram of the embodiment of the invention two;
Fig. 4 is a schematic diagram behind the copper pipe, Al pipe butt welding of the embodiment of the invention two.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is elaborated:
Embodiment one
It is a kind of copper-aluminum joint pressure welding technique, and step is as follows:
1. blanking copper pipe and aluminum pipe, burring carries out pickling to copper pipe surface; This copper pipe is to adopt the TP2 oxygen-free copper pipe, and this aluminum pipe is to adopt 1060 pure aluminum tubes or 3003 alloy aluminum pipes.
2. welding:
A, adjust welding machine and clamp mould up and down;
B, as shown in Figure 1, 2, copper pipe 1 and aluminum pipe 2 are clamped in respectively in the upper and lower clamp mould 3,4, the two-port of welding is stretched out outside the clamp mould, and the surface of its port is plane and butt joint, and copper pipe and aluminum pipe end to be welded are heated to about 420 ℃, apply the upsetting force of 0.8MPa then, make the copper pipe solder side reach tight and contact, produce radial plastic deformation, form the metal overlap by pressure with the Al pipe butt welding face, closely the pure metal of contact forms weld seam, finishes welding process;
3. examine overlap, remove residue;
4. remove outer burr;
5. whether qualified with air pressure test leak detection;
6. oven dry;
7. helium leak check adopts heat-shrink tube to carry out integral protection to aluminum pipe and copper-aluminium joint after the helium leak check operation;
8. behind the welding sequence copper-aluminium joint is carried out through hole, remove outer burr.
Embodiment two
It is a kind of copper-aluminum joint pressure welding technique, and step is as follows:
1. blanking copper pipe and aluminum pipe, burring carries out pickling to copper pipe surface; This copper pipe is to adopt the TP2 oxygen-free copper pipe, and this aluminum pipe is to adopt 1060 pure aluminum tubes or 3003 alloy aluminum pipes.
2. welding:
A, adjust welding machine and clamp mould up and down;
B, shown in Fig. 3,4, copper pipe 1 and aluminum pipe 2 are clamped in respectively in the upper and lower clamp mould 3,4, the two-port of welding is stretched out outside the clamp mould, and the port of copper, aluminum pipe is pegged graft and cooperated, and copper pipe and aluminum pipe end to be welded are heated to about 540 ℃, apply the upsetting force of 0.4MPa then, make the copper pipe solder side reach tight and contact, produce radial plastic deformation, form the metal overlap by pressure with the Al pipe butt welding face, closely the pure metal of contact forms weld seam, finishes welding process;
3. examine overlap, remove residue;
4. remove outer burr;
5. whether qualified with air pressure test leak detection;
6. oven dry;
7. helium leak check adopts heat-shrink tube to carry out integral protection to aluminum pipe and copper-aluminium joint after the helium leak check operation;
8. behind the welding sequence copper-aluminium joint is carried out through hole, remove outer burr.
Embodiment three
It is a kind of copper-aluminum joint pressure welding technique, and step is as follows:
1. blanking copper pipe and aluminum pipe, burring carries out pickling to copper pipe surface; This copper pipe is to adopt the TP2 oxygen-free copper pipe, and this aluminum pipe is to adopt 1060 pure aluminum tubes or 3003 alloy aluminum pipes.
2. welding:
A, adjust welding machine and clamp mould up and down;
B, as shown in Figure 1, 2, copper pipe 1 and aluminum pipe 2 are clamped in respectively in the upper and lower clamp mould 3,4, the two-port of welding is stretched out outside the clamp mould, and the surface of its port is plane and butt joint, and copper pipe and aluminum pipe end to be welded are heated to about 480 ℃, apply the upsetting force of 0.6MPa then, make the copper pipe solder side reach tight and contact, produce radial plastic deformation, form the metal overlap by pressure with the Al pipe butt welding face, closely the pure metal of contact forms weld seam, finishes welding process;
3. examine overlap, remove residue;
4. remove outer burr;
5. whether qualified with air pressure test leak detection;
6. oven dry;
7. helium leak check adopts heat-shrink tube to carry out integral protection to aluminum pipe and copper-aluminium joint after the helium leak check operation;
8. behind the welding sequence copper-aluminium joint is carried out through hole, remove outer burr.
Claims (5)
1, a kind of copper-aluminum joint pressure welding technique is characterized in that step is as follows:
1. blanking copper pipe and aluminum pipe, burring carries out pickling to copper pipe surface;
2. welding:
A, adjust welding machine and clamp mould up and down;
B, copper pipe and aluminum pipe are clamped in respectively in the upper and lower clamp mould, the two-port of welding is stretched out outside the clamp mould, copper pipe and aluminum pipe end to be welded are heated to about 420～540 ℃, apply the upsetting force of 0.4～0.8MPa then, make the copper pipe solder side reach tight and contact, produce radial plastic deformation, form the metal overlap by pressure with the Al pipe butt welding face, closely the pure metal of contact forms weld seam, finishes welding process;
3. examine overlap, remove residue;
4. remove outer burr;
5. whether qualified with air pressure test leak detection;
6. oven dry;
7. helium leak check.
2, copper-aluminum joint pressure welding technique according to claim 1 is characterized in that described copper pipe is to adopt the TP2 oxygen-free copper pipe, and described aluminum pipe is to adopt 1060 pure aluminum tubes or 3003 alloy aluminum pipes.
3, copper-aluminum joint pressure welding technique according to claim 1 is characterized in that behind the welding sequence copper-aluminium joint being carried out through hole, removes outer burr.
4, copper-aluminum joint pressure welding technique according to claim 1 is characterized in that adopting heat-shrink tube to carry out integral protection to aluminum pipe and copper-aluminium joint after the helium leak check operation.
5, copper-aluminum joint pressure welding technique according to claim 1 is characterized in that described copper, aluminum pipe can carry out dock welding or plug-in type welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100281692A CN101274389B (en) | 2008-05-14 | 2008-05-14 | Copper-aluminum joint pressure welding technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100281692A CN101274389B (en) | 2008-05-14 | 2008-05-14 | Copper-aluminum joint pressure welding technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101274389A true CN101274389A (en) | 2008-10-01 |
| CN101274389B CN101274389B (en) | 2010-06-09 |
Family
ID=39994471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100281692A Active CN101274389B (en) | 2008-05-14 | 2008-05-14 | Copper-aluminum joint pressure welding technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101274389B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284788A (en) * | 2011-07-14 | 2011-12-21 | 江苏金鑫电器有限公司 | Pressure deposition welding method for aluminum and copper dissimilar metals |
| CN102728945A (en) * | 2012-05-24 | 2012-10-17 | 哈尔滨工业大学 | Liquid phase connected die forging integral forming method of material |
| CN106181014A (en) * | 2016-08-01 | 2016-12-07 | 江苏星瑞化工工程科技有限公司 | A kind of metal tube pressure welding technique |
| CN109249110A (en) * | 2018-11-15 | 2019-01-22 | 燕卓君 | Cu-AL pipe line high-intensity welding device |
| CN110227890A (en) * | 2019-04-17 | 2019-09-13 | 余姚市电波机械有限公司 | The welding method of refrigerator pipes |
| CN113226618A (en) * | 2019-02-19 | 2021-08-06 | 株式会社阿斯特 | Bus bar assembly and method for manufacturing bus bar assembly |
| CN114952204A (en) * | 2022-06-30 | 2022-08-30 | 金锢电气有限公司 | Copper-aluminum composite welding method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032129A (en) * | 1987-09-22 | 1989-04-05 | 上海新江机器厂 | Fast cold welding for joint of aluminium and copper |
| CN1008242B (en) * | 1988-04-14 | 1990-06-06 | 航天部第七○三研究所 | Cu-al pipe-cold welding process for vapourizer of refrigerator |
| CN2677719Y (en) * | 2004-01-15 | 2005-02-09 | 左铁军 | Inserted copper alumium pipe welding joint |
-
2008
- 2008-05-14 CN CN2008100281692A patent/CN101274389B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284788A (en) * | 2011-07-14 | 2011-12-21 | 江苏金鑫电器有限公司 | Pressure deposition welding method for aluminum and copper dissimilar metals |
| CN102728945A (en) * | 2012-05-24 | 2012-10-17 | 哈尔滨工业大学 | Liquid phase connected die forging integral forming method of material |
| CN106181014A (en) * | 2016-08-01 | 2016-12-07 | 江苏星瑞化工工程科技有限公司 | A kind of metal tube pressure welding technique |
| CN109249110A (en) * | 2018-11-15 | 2019-01-22 | 燕卓君 | Cu-AL pipe line high-intensity welding device |
| CN113226618A (en) * | 2019-02-19 | 2021-08-06 | 株式会社阿斯特 | Bus bar assembly and method for manufacturing bus bar assembly |
| US11870193B2 (en) | 2019-02-19 | 2024-01-09 | Aster Co., Ltd. | Busbar unit and method of manufacturing busbar unit |
| CN110227890A (en) * | 2019-04-17 | 2019-09-13 | 余姚市电波机械有限公司 | The welding method of refrigerator pipes |
| CN114952204A (en) * | 2022-06-30 | 2022-08-30 | 金锢电气有限公司 | Copper-aluminum composite welding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101274389B (en) | 2010-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101274389B (en) | Copper-aluminum joint pressure welding technique | |
| CN101708964B (en) | Glass and metal vacuum brazing technique | |
| CN102107232B (en) | Method for manufacturing steel-copper composite welded tube | |
| CN104191081B (en) | Device and its welding method for copper pipe in refrigeration equipment and Al pipe butt welding | |
| CN102489865A (en) | Welding method for copper back plate and target | |
| CN110369959B (en) | Manufacturing process of integrated stretching liquid storage device | |
| CN101642847B (en) | Method for removing the thermal compression welding of copper-aluminum combined pipeline fitting under the assistance of rotary friction | |
| CN107009002A (en) | The accurate control automatic argon arc pipe welding method of stainless steel pipe | |
| CN100460129C (en) | Copper aluminum composite pipeline, processing equipment and its processing method | |
| CN111347147A (en) | Hot isostatic pressing connection method of tungsten and heat sink material | |
| CN2813184Y (en) | Thin wall metal welding structure | |
| JP2009226454A (en) | Method and apparatus of joining metallic member | |
| CN1013253B (en) | Special metal pipe impact extrusion thermal diffusion welding technology | |
| CN106216554A (en) | A kind of air-conditioning heat exchanger technique | |
| CN103624393B (en) | The hot self-pressure method of attachment of rigid restraint | |
| JPH0985467A (en) | Joined body between copper tube and aluminum tube and joining method | |
| CN102107233B (en) | Method for manufacturing steel/copper composite welded pipe | |
| JPWO2010090288A1 (en) | Refrigeration cycle container and refrigeration cycle equipment | |
| CN106181014A (en) | A kind of metal tube pressure welding technique | |
| CN205967779U (en) | Copper aluminum pipe thermal resistance welding set | |
| CN104816075A (en) | Argon arc welding method for alumal pipe of air separation system | |
| CN102554456B (en) | Diffusion welding method for titanium-aluminum based alloy and titanium alloy added amorphous interlayer | |
| CN112103749B (en) | Copper-aluminum connecting sheet and preparation method thereof | |
| CN112223758A (en) | Butt welding connection and construction method for steel skeleton plastic composite pipes | |
| CN103386548B (en) | Coil rack diffusion welding method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 528300 No. 22 Xinhui Road, five Sha Industrial Area, Foshan, Guangdong, Shunde Patentee after: Guangdong Sansheng Electric Co., Ltd Address before: 528300 No. 22 Xinhui Road, five Sha Industrial Area, Foshan, Guangdong, Shunde Patentee before: Foshan Shunde Sansheng Electrical Manufacture Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |