CN101642847B - Method for removing the thermal compression welding of copper-aluminum combined pipeline fitting under the assistance of rotary friction - Google Patents
Method for removing the thermal compression welding of copper-aluminum combined pipeline fitting under the assistance of rotary friction Download PDFInfo
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- CN101642847B CN101642847B CN2009103068787A CN200910306878A CN101642847B CN 101642847 B CN101642847 B CN 101642847B CN 2009103068787 A CN2009103068787 A CN 2009103068787A CN 200910306878 A CN200910306878 A CN 200910306878A CN 101642847 B CN101642847 B CN 101642847B
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Abstract
A method for the thermal compression welding of a copper-aluminum combined pipeline fitting with the assistance of rotary friction to remove an aluminium tube oxidation film relates to the field of thermal compression welding process and solving the problem that the prior connection method of the conventional aluminum tube has poor connection compactness and low finished product ratio due to the compact oxidation film in the used aluminum tube. The method comprises the following steps: the outer wall of one end of a copper pipe to be welded is processed into a tapered surface, the copper pipe is secured at a drill chuck of a drilling and milling machine while the aluminum pipe is secured on a clamp of the drilling and milling machine, one end with tapered surface of the copper pipe is inserted into one end of the aluminum pipe, and the sleeved section between the copper pipe and the aluminum pipe is heated up using an acetylene flame gun, when the temperature reaches 400-500 DEG C, the copper pipe is rotated and the other end of the copper pipe is pressurized so that the copper pipe is inserted into the aluminum pipe, and heating is ceased to accomplish total welding between the copper pipe and the aluminum pipe. The method in the invention is applied to welding the combined pipeline fittings in refrigeration products.
Description
Technical field
The present invention relates to a kind of method that adopts spin friction auxiliary copper aluminium combined pipeline piece hot pressing welding, the copper aluminum pipe welding procedure of hot pressing that is specifically related to adopt the auxiliary welding equipment of drilling and milling machine conduct and applies flame heat.
Background technology
At present, refrigeration industry has adopted a large amount of copper pipes in products such as its refrigerator, air-conditioning, but because the price of copper is higher, makes that product cost is difficult to reduce.If can a part of copper pipe be replaced with aluminum pipe, then can reduce cost greatly.For refrigeration pipe, its some need stand the effect of specific load, temperature and medium and must use copper pipe, other pipeline portions can replace with aluminum pipe fully.It is low that aluminium alloy has density, and intensity is high, and is corrosion-resistant; Thermal conductance and electrical conductivity advantages of higher, so copper aluminum pipe road combining structure can not only alleviate the weight of member; Practice thrift cost, can also bring into play performance advantage separately, be the target that people pursue with aluminium for copper for many years therefore always.Is to solve the problem that can copper aluminium effectively link together between the two with aluminium for the key of copper.Owing to there is the fine and close oxide-film of one deck on the aluminium surface, be difficult to remove, and moment generation in atmospheric environment again after the removal, if will realize its fine and close connection reliably, difficulty is very big.
The method of attachment of present conventional copper aluminum pipe has soldering, electric resistance welding, stored energy welding etc.; But need usually to adopt the welding equipment of specialty to weld, therefore this copper aluminium pipeline fitting assembling more complicated, density neither be very good; Yield rate is lower; Production efficiency is lower, and production cost is higher, causes it excellent popularization not use; Open day is on June 30th, 1980; Publication number is JP5508669A; Denomination of invention for the bonding method of aluminum pipe " copper pipe with " though the adhering method of said copper pipe and aluminum pipe has been realized being connected of copper pipe and aluminum pipe through being connected solder system; Employed aluminum pipe inside exists dense oxidation film but it still can't overcome, and causes connection compactness poor, the problem that yield rate is low.
Summary of the invention
The present invention exists dense oxidation film for the method for attachment that solves existing conventional copper aluminum pipe owing to employed aluminum pipe inside for solving the present invention; And cause connection compactness poor; The problem that yield rate is low; Propose a kind of method that adopts the copper-aluminium combined pipeline piece hot pressing welding of spin friction assist removal aluminum pipe oxide-film, this method is accomplished by following steps:
Step 1: the outer wall of copper pipe to be welded one end is processed into taper surface, and the cone angle of said taper surface is 5 °～10 °, and the scope of the difference of the internal diameter Φ 1 of said copper pipe and the internal diameter Φ 2 of aluminum pipe is between 0mm～1mm;
Step 2: the copper pipe that step 1 is obtained is fixed on the drill chuck head of drilling and milling machine; Aluminum pipe is fixed on the anchor clamps of drilling and milling machine workbench; An end that then said copper pipe is had the end insertion aluminum pipe of taper surface; The drill chuck head of debugging drilling and milling machine keeps point-blank the axis of said copper pipe and the axis of aluminum pipe;
Step 3: at first the socket place to copper pipe and aluminum pipe heats with the acetylene torch rifle, when the temperature of the socket place of said copper pipe and aluminum pipe reaches 400 ℃-500 ℃, opens the power supply of drilling and milling machine, said drilling and milling machine with copper pipe with 800～2000r.min
-1Rotational speed, simultaneously the other end of said copper pipe is exerted pressure, an end that makes copper pipe have a taper surface moves in aluminum pipe by per second 1mm～2mm speed;
Step 4: when an end of the taper surface of said copper pipe inserts aluminum pipe fully, stop the other end of copper pipe is exerted pressure, the copper pipe that stops operating simultaneously, and stop socket place heating to copper pipe and aluminum pipe, accomplish the welding of copper pipe and aluminum pipe.
Beneficial effect of the present invention: the present invention is through the spin friction of copper pipe in aluminum pipe; Can effectively remove the fine and close oxide-film of aluminum pipe inner surface; Make the moment that copper contacts with the aluminium unsalted surface realize welding, under certain pressure and temperature action, copper aluminium contact surface is reached closely and contact, reach the scope of gravitational force between atoms; Effectively promote the copper interatomic diffusion in aluminium interface, thereby realize reliable metallurgical binding.The present invention is easy to assembly to the workpiece that adopts in the copper-aluminium combined pipeline piece thermocompression bonding termination process, and yield rate is high, and production efficiency is high; Cost is low; Can realize the welding of copper aluminium pipeline fitting preferably, and can guarantee that the caliber of inside and outside caliber and aluminum pipe at copper pipe joint place is basic identical, welding quality is good; Fuse face width, thereby guaranteed the refrigeration and the following process structural requirement thereof of product; Adopt drilling and milling machine as assisting welding equipment and applying the copper aluminum pipe welding procedure of hot pressing that flame heat is a main heat source, simplified the copper-aluminium combined pipeline piece assembling, enlarge with the aluminum pipe range of application and the result of use of the copper aluminum pipe built-up joint structure that is the master.Adopt the combined pipeline fitting of the welding of method of the present invention can be widely used in refrigeration products such as air-conditioner, refrigerator, refrigerator-freezer, the displaying Room, water dispenser, dehumidifier and the system.
Description of drawings
Fig. 1 is described copper pipe and the aluminum pipe preceding putting position sketch map to be welded in the step 2 of the present invention, wherein, 1 expression copper pipe, 2 expression aluminum pipes, A representes taper surface; Fig. 2 is the micro-organization chart of the section of the socket place of copper pipe after welding and aluminum pipe, and Fig. 3 is the macrograph of the copper aluminum pipe combined pipeline fitting socket place after welding.
The specific embodiment
The specific embodiment one: below in conjunction with Fig. 1 this specific embodiment is described, a kind of method that adopts spin friction auxiliary copper aluminium combined pipeline piece hot pressing welding, this method is realized by following steps:
Step 1: the outer wall of copper pipe to be welded 1 one ends is processed into taper surface A, and the cone angle of said taper surface A is 5 °～10 °, and the scope of the difference of the internal diameter Φ 1 of said copper pipe 1 and the internal diameter Φ 2 of aluminum pipe 2 is between 0mm～1mm;
Step 2: the copper pipe 1 that step 1 is obtained is fixed on the drill chuck head of drilling and milling machine; Aluminum pipe 2 is fixed on the anchor clamps of drilling and milling machine workbench; An end that then said copper pipe 1 is had the end insertion aluminum pipe 2 of taper surface A; The drill chuck head of debugging drilling and milling machine keeps point-blank the axis of said copper pipe 1 and the axis of aluminum pipe 2;
Step 3: at first copper pipe 1 socket place with aluminum pipe 2 is heated with the acetylene torch rifle, when the temperature of said copper pipe 1 and the socket place of aluminum pipe 2 reaches 400 ℃-500 ℃, the power supply of unlatching drilling and milling machine, said drilling and milling machine with copper pipe 1 with 800～2000r.min
-1Rotational speed, simultaneously the other end of said copper pipe 1 is exerted pressure, an end that makes copper pipe 1 have a taper surface moves in aluminum pipe 2 by per second 1mm～2mm speed;
Step 4: when the end of the taper surface A of said copper pipe 1 inserts aluminum pipe 2 fully, stop the other end of copper pipe 1 is exerted pressure, the copper pipe 1 that stops operating simultaneously, and stopping the socket place heating of copper pipe 1 with aluminum pipe 2 is accomplished the welding of copper pipe 1 and aluminum pipe 2.
The described Fig. 2 of this embodiment is the micro-organization chart of the copper pipe 1 after welding with the section of the socket place of aluminum pipe 2, and the field trashes such as interface oxide-free of said copper pipe 1 and aluminum pipe 2 can be realized good metallurgical binding; Fig. 3 is the macrograph of the copper-aluminium combined pipeline piece socket place after welding, and described copper-aluminium combined pipeline piece is used for refrigeration pipe system, meets the instructions for use of refrigeration pipe system.
The described copper pipe 1 of this embodiment is industrial red copper.
The model of the described aluminum pipe 2 of this embodiment can be a kind of among L1, L2, L3, LF2, LF3, LF5 or the LF21.
The external diameter scope of described aluminum pipe 2 of this embodiment and copper pipe 1 is all between Φ 8mm～Φ 25mm.
The external diameter scope of described aluminum pipe 2 of this embodiment and copper pipe 1 is all between Φ 10mm～Φ 20mm.
The external diameter scope of described aluminum pipe 2 of this embodiment and copper pipe 1 is all between Φ 15mm～Φ 18mm.
The described aluminum pipe 2 of this embodiment is 1mm～5mm with the wall thickness of copper pipe 1.
The described aluminum pipe 2 of this embodiment is 2mm～4mm with the wall thickness of copper pipe 1.
Accompany asbestos between aluminum pipe described in this embodiment 2 and the anchor clamps, make between said aluminum pipe 2 and the anchor clamps and reduced hot transmission, reduced the thermal loss that aluminum pipe 2 causes with the heat transmission of anchor clamps and other external environments simultaneously.
In this embodiment the said drilling and milling machine of step 3 with copper pipe 1 with 800～2000r.min
-1Rotational speed, in rotation process, copper pipe 1 solder side of hard is removed the oxide-film grinding on soft aluminum pipe 2 inwalls, and the frictional heat that produces can be used as effective welding heat source.
Claims (9)
1. the method for a copper-aluminium combined pipeline piece hot pressing welding of adopting spin friction assist removal aluminum pipe oxide-film is characterized in that this method accomplished by following steps:
Step 1: the outer wall of copper pipe to be welded (1) one end is processed into taper surface (A), and the cone angle of said taper surface (A) is 5 °～10 °, and the scope of the difference of the internal diameter Φ 2 of the internal diameter Φ 1 of said copper pipe (1) and aluminum pipe (2) is between 0mm～1mm;
Step 2: the copper pipe (1) that step 1 is obtained is fixed on the drill chuck head of drilling and milling machine; Aluminum pipe (2) is fixed on the anchor clamps of drilling and milling machine workbench; An end that then said copper pipe (1) is had the end insertion aluminum pipe (2) of taper surface; The drill chuck head of debugging drilling and milling machine keeps point-blank the axis of said copper pipe (1) and the axis of aluminum pipe (2);
Step 3: at first the socket place of copper pipe (1) with aluminum pipe (2) heated with the acetylene torch rifle; When the temperature of the socket place of said copper pipe (1) and aluminum pipe (2) reaches 400 ℃-500 ℃; Open the power supply of drilling and milling machine, said drilling and milling machine with copper pipe (1) with 800～2000r.min
-1Rotational speed, simultaneously the other end of said copper pipe (1) is exerted pressure, an end that makes copper pipe (1) have a taper surface moves in aluminum pipe (2) by per second 1mm～2mm speed;
Step 4: when an end of the taper surface (A) of said copper pipe (1) inserts aluminum pipe (2) fully; Stop the other end of copper pipe (1) is exerted pressure; The copper pipe (1) that stops operating simultaneously, and stopping the socket place heating of copper pipe (1) with aluminum pipe (2) is accomplished the welding of copper pipe (1) and aluminum pipe (2).
2. a kind of method that adopts the copper-aluminium combined pipeline piece hot pressing welding of spin friction assist removal aluminum pipe oxide-film according to claim 1 is characterized in that said copper pipe (1) is industrial red copper.
3. a kind of method that adopts the copper-aluminium combined pipeline piece hot pressing welding of spin friction assist removal aluminum pipe oxide-film according to claim 1 and 2; It is characterized in that the model of described aluminum pipe (2) is: a kind of among L1, L2, L3, LF2, LF3, LF5 or the LF21.
4. a kind of method that adopts the copper-aluminium combined pipeline piece hot pressing welding of spin friction assist removal aluminum pipe oxide-film according to claim 3 is characterized in that, accompanies asbestos between said aluminum pipe (2) and the anchor clamps.
5. according to claim 1,2 or 4 described a kind of methods that adopt the copper-aluminium combined pipeline piece hot pressing welding of spin friction assist removal aluminum pipe oxide-film, it is characterized in that the external diameter scope of described copper pipe (1) and aluminum pipe (2) is between Φ 8mm～Φ 25mm.
6. according to claim 1,2 or 4 described a kind of methods that adopt the copper-aluminium combined pipeline piece hot pressing welding of spin friction assist removal aluminum pipe oxide-film, it is characterized in that the external diameter scope of described copper pipe (1) and aluminum pipe (2) is between Φ 10mm～Φ 20mm.
7. according to claim 1,2 or 4 described a kind of methods that adopt the copper-aluminium combined pipeline piece hot pressing welding of spin friction assist removal aluminum pipe oxide-film, it is characterized in that the external diameter scope of described copper pipe (1) and aluminum pipe (2) is between Φ 15mm～Φ 18mm.
8. according to claim 1,2 or 4 described a kind of methods that adopt the copper-aluminium combined pipeline piece hot pressing welding of spin friction assist removal aluminum pipe oxide-film, it is characterized in that the wall thickness range of said aluminum pipe (2) and copper pipe (1) is between 1mm～5mm.
9. according to claim 1,2 or 4 described a kind of methods that adopt the copper-aluminium combined pipeline piece hot pressing welding of spin friction assist removal aluminum pipe oxide-film, it is characterized in that the wall thickness range of said aluminum pipe (2) and copper pipe (1) is between 2mm～4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103068787A CN101642847B (en) | 2009-09-11 | 2009-09-11 | Method for removing the thermal compression welding of copper-aluminum combined pipeline fitting under the assistance of rotary friction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103068787A CN101642847B (en) | 2009-09-11 | 2009-09-11 | Method for removing the thermal compression welding of copper-aluminum combined pipeline fitting under the assistance of rotary friction |
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| CN101642847A CN101642847A (en) | 2010-02-10 |
| CN101642847B true CN101642847B (en) | 2012-03-28 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103264220A (en) * | 2012-08-16 | 2013-08-28 | 邯郸慧桥复合材料科技有限公司 | Bimetal tube blank friction welding method |
| CN103831526B (en) * | 2014-03-07 | 2015-10-28 | 哈尔滨工业大学 | A kind of striping servicing unit is utilized to carry out spreading the method connected |
| US20180111231A1 (en) * | 2016-10-25 | 2018-04-26 | GM Global Technology Operations LLC | Method for metallurgically bonding a cylinder liner into a bore in an engine block |
| CN107695508A (en) * | 2017-10-10 | 2018-02-16 | 青海西矿杭萧钢构有限公司 | A kind of assembling and welding method of steel pipe bundle |
| CN108930849A (en) * | 2018-08-27 | 2018-12-04 | 常州市常蒸蒸发器有限公司 | A kind of refrigeration equipment copper-aluminium joint and manufacturing process |
| 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 |
| CN113732434A (en) * | 2021-11-03 | 2021-12-03 | 徐州市全球通精密钢管有限公司 | Seamless steel pipe splicing device for fluid conveying |
| CN115401281A (en) * | 2022-09-01 | 2022-11-29 | 中国兵器装备集团西南技术工程研究所 | Radial friction brazing method for titanium-aluminum dissimilar metal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1144731A (en) * | 1996-08-02 | 1997-03-12 | 姚春 | Copper-aluminium joint friction welding technique |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1144731A (en) * | 1996-08-02 | 1997-03-12 | 姚春 | Copper-aluminium joint friction welding technique |
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Granted publication date: 20120328 Termination date: 20120911 |