CN100460129C - Copper aluminum composite pipeline, processing equipment and its processing method - Google Patents
Copper aluminum composite pipeline, processing equipment and its processing method Download PDFInfo
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- CN100460129C CN100460129C CNB200610035605XA CN200610035605A CN100460129C CN 100460129 C CN100460129 C CN 100460129C CN B200610035605X A CNB200610035605X A CN B200610035605XA CN 200610035605 A CN200610035605 A CN 200610035605A CN 100460129 C CN100460129 C CN 100460129C
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Abstract
The present invention is apparatus and process for producing composite copper-aluminum pipe, and has short production period, small gap in the joint between copper pipe and aluminum pipe, no fallen aluminum chips, no impact force of the refrigerating medium in the joint and high jointing strength. The copper pipe includes one main pipe section, transition sections and reducing sections connected successively, and the aluminum pipe is set around the transition section and reducing section of the copper pipe. The copper pipe has outer diameter greater than or equal to that of the copper pipe, and its reducing sections has outer diameter smaller than the inner diameter of the aluminum pipe. The joint between the aluminum pipe and the copper pipe has fused inner surface.
Description
Technical field
The present invention relates to a kind of improved metallic conduit, be applicable to employed metal piping system in the production process of products such as air-conditioner, refrigerator, refrigerator, relate in particular to by copper pipe and the compound metal piping system that connects and composes of aluminum pipe and process equipment and processing method.
Background technology
Characteristics such as intensity height, ductility are good because copper product has, fusing point height, in the production process of products such as air-conditioner, refrigerator, refrigerator, usually, need to use the chief component of a large amount of copper pipes as heat exchanger internal pipeline, tube connector and circulatory system pipeline, difference according to the product type size, copper pipe cuts into 0.4-5 meters long with the copper pipe of rolling often, and Bending Processing forms again.Because production-scale requirement, the present production capacity of domestic electric type manufacturing enterprise is badly in need of improving constantly, reduce production costs with this, how to be implemented on the existing basis, by improvement to equipment and product structure, improving the whole production efficiency and the convenience of operation, is the problem that producer presses for solution.Simultaneously because the price of copper product is risen sharply in recent years, producer seeking always a kind of with low cost, reliably connecting line comes part or replacing whole copper pipe easily, in the hope of when not influencing properties of product, reduces the Material Cost of product.Because the price of copper product is more than 2 times of aluminum, in the prior art, realized forming a part into pipe-line system by the local copper pipe that substitutes of aluminum pipe.Because aluminum pipe hardness is lower, the faying face poor sealing, only be fit to use the pipeline main paragraph that carries out twisting repeatedly operations such as closing at long not needs and other pipe joints, the positions such as interlude of tube connector for example, therefore, in the pipe-line system of the compound connection of aluminum pipe, the transition portion that the many places copper pipe is connected with aluminum pipe can appear.Because copper product has the intensity height, ductility is good, after copper pipe need being carried out reducing and handling, insert copper pipe in the aluminum pipe at the position that copper pipe is connected with aluminum pipe, and the employing resistance welded is an one.Copper aluminum composite pipeline of the prior art, include copper pipe and aluminum pipe closely is formed by connecting by welding manner, the external diameter of copper pipe is more than or equal to the external diameter of described aluminum pipe, copper pipe includes trunk line section, changeover portion and closing in section and is connected in sequence, and aluminium pipe sleeve is located at the periphery of the changeover portion of described copper pipe and the section that closes up.The changeover portion of copper pipe has two kinds of implementations, can be a kind of scalene cone, also can be a kind of reducing transition face, described reducing transition face is compared with the scalene cone of embodiment one, the reducing transition face along the size of pipeline center's direction little with the size of scalene cone along pipeline center's direction, promptly the distance of the trunk line Duan Yuzhu straight section of copper pipe shortens greatly.Adopt the copper pipe structure of reducing transition face, utilize draw technology can form trunk line section, changeover portion and closing in section quickly and easily; And the copper pipe structure of employing scalene cone then needs to make special mould, just can process.For with large-scale production, adopt the copper pipe structure of reducing transition face more to meet the requirement that reduces cost.
Prior art copper aluminum composite pipeline welding method comprises the steps:
1, aluminium pipe sleeve is located at the periphery of the changeover portion of described copper pipe and the section that closes up;
2, resistance welded lathe energising, aluminum pipe and copper pipe contact portion are fused gradually;
3, copper pipe is advanced to aluminum pipe trunk line section, the copper pipe changeover portion and the section that closes up are surrounded fully until aluminum pipe;
4, the fusion face of cooling copper aluminum composite pipeline;
5, each process equipment resets, and takes out product.
Adopt the copper aluminum composite pipeline of said method processing, because aluminum pipe is to be pushed in the fusion processes gradually, this step is longer process time, and production efficiency is lower.Especially adopt the copper aluminum composite pipeline of reducing transition face mode for changeover portion, because the reducing transition face sharply changes, and because the fusing point of aluminium is than low about 400 ℃ of the fusing point of copper, in welding process, be difficult to realize interatomic combination, therefore at the faying face place of copper pipe and aluminum pipe, often there is the slit inevitably, aluminium is extruded copper aluminium faying face zone easily, and causing has the aluminium bits in the pipe, in the product practical application, air flowability in the influence pipe, the aluminium that works long hours bits come off and will cause the obstruction of system the inside, destroy system's cleannes, thereby reduce properties of product and life-span; And owing to have the slit at the faying face of copper pipe and aluminum pipe, the refrigeration working medium in the pipe-line system will cause pipeline to rupture herein to producing impulsive force herein in flowing.
Summary of the invention
In order to overcome deficiency of the prior art, the purpose of this invention is to provide a kind of process equipment and processing method of copper aluminum composite pipeline, can shorten the process-cycle, dwindle the slit at the faying face place of copper pipe and aluminum pipe.
Another object of the present invention provides a kind of improved metal tube, include copper pipe and aluminum pipe be combined into, can not cause the aluminium bits to come off at the faying face place of copper pipe and aluminum pipe, the refrigeration working medium in the pipe-line system can not produce impulsive force herein yet, and increases the intensity at copper-aluminium joint position.
The object of the present invention is achieved like this:
A kind of process equipment of copper aluminum composite pipeline includes the resistance welded lathe, and described resistance welded lathe is provided with: frame, workpiece clamping die, clamping cylinder, cooling water system and control system; Described workpiece clamping die is divided into discerptible two parts and forms, when two parts of described workpiece clamping die are closed, columniform cavity is promptly sealed in inside, and described copper aluminum composite pipeline to be processed is positioned in the described cavity, and described workpiece clamps the tight described copper aluminum composite pipeline to be processed of die clamp; Described clamping cylinder links to each other with described workpiece clamping die, drives the motion of workpiece clamping die; Be provided with the cooling water system circulating line in the described workpiece clamping die; Wherein, described resistance welded lathe also is provided with expander roll device and the expander roll promotion cylinder that is used to expand the copper pipe inner chamber, and described expander roll device includes expander roll, head and securing member expand.
A kind of processing method of copper aluminum composite pipeline, described copper aluminum composite pipeline closely is formed by connecting by welding manner by copper pipe and aluminum pipe, described copper pipe is connected in sequence by trunk line section, changeover portion and closing in section, the external diameter of the trunk line section of described copper pipe is more than or equal to the external diameter of described aluminum pipe, the internal diameter of described aluminum pipe is greater than the external diameter of the closing in section of described copper pipe, described aluminium pipe sleeve is located at the periphery of the changeover portion of described copper pipe and the section that closes up, and described processing method comprises the steps:
The first step: the periphery that aluminium pipe sleeve is located at the changeover portion of described copper pipe and the section that closes up;
Second step: the first half that clamps air cylinder driven workpiece clamping die moves downward first clamping work pieces aluminum pipe section;
The 3rd goes on foot: expander roll promotes cylinder and promotes the inner chamber that the expander roll device puts in copper pipe closing in section, and the inner chamber of copper pipe closing in section is expanded, and copper pipe external diameter and aluminum pipe internal diameter are combined closely, and after this workpiece copper pipe section is clamped;
The 4th step: the energising of resistance welded lathe, aluminum pipe and copper pipe contact portion produce a large amount of heats, and the aluminum pipe contact-making surface fuses gradually;
The 5th goes on foot: with the 4th while in step, expander roll promotes cylinder and promotes the inner chamber that the expander roll device withdraws from copper pipe closing in section;
The 6th step: cooling water system is to being cooled off near the copper aluminum composite pipeline fusion face;
The 7th step: the first half that clamps air cylinder driven workpiece clamping die moves upward, and unclamps workpiece;
The 8th step: each process equipment resets, and takes out product.
A kind of copper aluminum composite pipeline, closely be formed by connecting by welding manner by copper pipe and aluminum pipe, described copper pipe is by the trunk line section, the changeover portion and the section that closes up are connected in sequence, the external diameter of the trunk line section of described copper pipe is more than or equal to the external diameter of described aluminum pipe, the internal diameter of described aluminum pipe is greater than the closing in section external diameter of described copper pipe, described aluminium pipe sleeve is located at the periphery of the changeover portion of described copper pipe and the section that closes up, wherein, the front end face outer rim of the closing in section of described copper pipe, be provided with a circle back taper boss, the external diameter of described back taper boss leading section is equal to or slightly less than the internal diameter of described aluminum pipe, the external diameter of described back taper boss leading section is greater than the external diameter of the root of described back taper boss, the inner surface of described aluminum pipe and described copper pipe junction is a fusion face, and the shape of described fusion face is identical with the outer surface at this position of described copper pipe.
Copper aluminum composite pipeline of the present invention, occur the problem of aluminium bits in the pipe when having overcome the resistance welded copper-aluminium joint easily, cause the difficulty that burr occurs in the purge tube, adopting in the copper pipe end of copper aluminum pipe bound fraction increases a back taper, both prevented that aluminium from appearring in endoporus, increased copper-aluminium joint intensity simultaneously.Present technique can make the copper aluminum pipe connect well, does not occur burr in the pipe, and strength of joint increases, thereby enhances product performance and quality, prolongs product service life.The processing method of copper aluminum composite pipeline of the present invention, because having increased expander roll promotes cylinder and promotes the expander roll device and put in the close up inner chamber of section of copper pipe the close up inner chamber of section of copper pipe is expanded this step, adopt the copper pipe of reducing transition face for processing, still can shorten the process-cycle, dwindle the slit at the faying face place of copper pipe and aluminum pipe.
Description of drawings
Accompanying drawing 1 is copper aluminum composite pipeline embodiment one copper pipe of the present invention and the preceding structural representation of Al pipe butt welding;
Accompanying drawing 2 is the structural representation after copper aluminum composite pipeline embodiment one copper pipe of the present invention and the Al pipe butt welding;
Accompanying drawing 3 is copper aluminum composite pipeline embodiment two copper pipes of the present invention and the preceding structural representation of Al pipe butt welding;
Accompanying drawing 4 is the structural representation after copper aluminum composite pipeline embodiment two copper pipes of the present invention and the Al pipe butt welding;
Accompanying drawing 5 promotes the schematic diagram that the expander roll device puts in the inner chamber of copper pipe closing in section for copper aluminum composite pipeline of the present invention adds expander roll promotion in man-hour cylinder;
Accompanying drawing 6 adds the copper pipe inner chamber of the section schematic diagram after expanding that closes up in man-hour for copper aluminum composite pipeline of the present invention.
In the accompanying drawing:
1, copper pipe trunk line section 12, scalene cone 13, cylinder section 14, back taper boss 2, aluminum pipe 3, fusion face
4, copper pipe trunk line section 42, reducing transition face 43, cylinder section 44, back taper boss 5, aluminum pipe
6, fusion face 7, expander roll device 71, expander roll 72, bloated 73, fastening screw.
The specific embodiment
A kind of copper aluminum composite pipeline of wood disclosure of the Invention, include copper pipe and aluminum pipe closely is formed by connecting by welding manner, the external diameter of described copper pipe is more than or equal to the external diameter of described aluminum pipe, described copper pipe includes the trunk line section, the changeover portion and the section that closes up are connected in sequence, the internal diameter of described aluminum pipe is greater than the external diameter of described copper pipe closing in section, described aluminium pipe sleeve is located at the periphery of the changeover portion of described copper pipe and the section that closes up, wherein, the front end face outer rim of the closing in section of described copper pipe, be provided with a circle back taper boss, the external diameter of described back taper boss leading section is equal to or slightly less than the internal diameter of described aluminum pipe, the external diameter of described back taper boss leading section is greater than the external diameter of the root of described back taper boss, the inner surface of described aluminum pipe and described copper pipe junction is a fusion face, and the shape of described fusion face is identical with the outer surface at this position of described copper pipe.
Embodiment one:
As Fig. 1, shown in Figure 2, described copper aluminum composite pipeline joint form is to adopt the copper pipe external diameter identical with aluminum pipe, described copper pipe comprises trunk line section 1, changeover portion and closing in section, described changeover portion is a scalene cone 12, described closing in Duan Weizhu straight section 13, back taper boss 14 of the front end band of copper pipe joint position cylinder section 13, described cylinder section 13 adopts scalene cone 12 to link to each other with copper pipe trunk line section 1, the inner surface of described aluminum pipe and described copper pipe junction is a fusion face 3, and the shape of described fusion face 3 is identical with the outer surface at this position of described copper pipe.Back taper boss 14 can stop that aluminium bits flow out fusion face 3, can stop simultaneously when refrigeration working medium flows to prevent that to producing impulsive force herein the aluminium bits from appearring in the pipe-line system inner surface; The external diameter of described cylinder section 13 is slightly less than the aluminum pipe internal diameter, and effect is the residue that keeps aluminium in the welding process; Adopt the scalene cone of copper pipe to cooperate with aluminum pipe, copper aluminium well fuses copper aluminium mutually to pressing when welding.
The external diameter of described back taper boss leading section is greater than the external diameter of the root of described back taper boss, the shape in described back taper boss 14 cross sections can be irregular shape, sphere, triangle or other shapes, preferred shape is, described back taper boss 14 cross sections be shaped as the conical surface.
Embodiment two:
As Fig. 3, shown in Figure 4, described copper aluminum composite pipeline joint form is to adopt the copper pipe external diameter identical with aluminum pipe, the copper pipe of described copper aluminum composite pipeline joint comprises trunk line section 4, the changeover portion and the section that closes up, described changeover portion is a reducing transition face 42, described closing in section is a cylinder section 43, back taper boss 44 of the front end band of copper pipe joint position cylinder section 43, described cylinder section 43 adopts reducing transition face 42 to link to each other with copper pipe trunk line section 4, the inner surface of described aluminum pipe and described copper pipe junction is a fusion face 6, and the shape of described fusion face 6 is identical with the outer surface at this position of described copper pipe.Back taper boss 44 can stop that aluminium bits flow out fusion face 6, can stop simultaneously when refrigeration working medium flows to prevent that to producing impulsive force herein the aluminium bits from appearring in the pipe-line system inner surface; The external diameter of described cylinder section 43 is slightly less than the aluminum pipe internal diameter, and effect is the residue that keeps aluminium in the welding process; Adopt the scalene cone of copper pipe to cooperate with aluminum pipe, copper aluminium well fuses copper aluminium mutually to pressing when welding.
Described reducing transition face 42 is compared with the scalene cone 12 of embodiment one, and less than the size of scalene cone 12 along pipeline center's direction, promptly the trunk line section 4 of copper pipe shortens with the distance of cylinder section 43 reducing transition face 42 greatly along the size of pipeline center's direction.Adopt the copper pipe structure of embodiment two, adopt draw technology can form trunk line section 4, changeover portion and closing in section quickly and easily; And the copper pipe structure of employing embodiment one then needs to make special mould, just can process.
The invention also discloses a kind of process equipment of copper aluminum composite pipeline, include the resistance welded lathe, described resistance welded lathe is provided with: frame, workpiece clamping die, clamping cylinder, cooling water system and control system; Described workpiece clamping die is divided into discerptible two parts and forms, when two parts of described workpiece clamping die are closed, columniform cavity is promptly sealed in inside, and described copper aluminum composite pipeline to be processed is positioned in the described cavity, and described workpiece clamps the tight described copper aluminum composite pipeline to be processed of die clamp; Described clamping cylinder links to each other with described workpiece clamping die, drives the motion of workpiece clamping die; Be provided with the cooling water system circulating line in the described workpiece clamping die; Wherein, described resistance welded lathe also is provided with expander roll device and the expander roll promotion cylinder that is used to expand the copper pipe inner chamber, and described expander roll device 7 includes expander roll 71, bloated 72 and securing member.Described bloated 72 external diameter is greater than the internal diameter of described copper pipe closing in section.
Described securing member is a kind of fastening screw 73.
Described clamping cylinder and expander roll promote cylinder and all are fixed on the described frame.
Described workpiece clamping die is divided into discerptible upper and lower two parts and forms, described clamping cylinder is positioned at workpiece clamping die top vertically, described workpiece clamping die top is connected with described clamping cylinder, and the motion repeatedly by cylinder drives described workpiece clamping die top and moves up and down.
Described expander roll promotes cylinder and is connected with expander roll 71, and described expander roll promotes cylinder and expander roll 71 is the horizontal direction setting, and the motion repeatedly of described expander roll promotion cylinder drives described expander roll 71 and moves horizontally.
Described cooling water system includes circulating water pipe and compressor.
Described control system includes Programmable Logic Controller.
The present invention also discloses a kind of processing method of copper aluminum composite pipeline in addition, described copper aluminum composite pipeline closely is formed by connecting by welding manner by copper pipe and aluminum pipe, described copper pipe is connected in sequence by trunk line section, changeover portion and closing in section, the external diameter of the trunk line section of described copper pipe is more than or equal to the external diameter of described aluminum pipe, the internal diameter of described aluminum pipe is greater than the external diameter of the closing in section of described copper pipe, described aluminium pipe sleeve is located at the periphery of the changeover portion of described copper pipe and the section that closes up, and described processing method comprises the steps:
The first step: the periphery that aluminium pipe sleeve is located at the changeover portion of described copper pipe and the section that closes up;
Second step: the first half that clamps air cylinder driven workpiece clamping die moves downward first clamping work pieces aluminum pipe section;
The 3rd goes on foot: expander roll promotes cylinder and promotes the inner chamber that the expander roll device puts in copper pipe closing in section, and the inner chamber of copper pipe closing in section is expanded, and copper pipe external diameter and aluminum pipe internal diameter are combined closely, and after this workpiece copper pipe section is clamped;
The 4th step: the energising of resistance welded lathe, aluminum pipe and copper pipe contact portion produce a large amount of heats, and the aluminum pipe contact-making surface fuses gradually;
The 5th goes on foot: with the 4th while in step, expander roll promotes cylinder and promotes the inner chamber that the expander roll device withdraws from copper pipe closing in section;
The 6th step: cooling water system is to being cooled off near the copper aluminum composite pipeline fusion face;
The 7th step: the first half that clamps air cylinder driven workpiece clamping die moves upward, and unclamps workpiece;
The 8th step: each process equipment resets, and takes out product.
Shown in accompanying drawing 5,6, the invention copper aluminum composite pipeline adds the man-hour copper pipe and closes up after the inner chamber of section expands, and the slit at aluminum pipe and copper pipe faying face place is eliminated.Whole process is to finish within 5 seconds, has improved production efficiency greatly.
Above-mentioned listed specific implementation is nonrestrictive, concerning the person skilled in the art of this area, is not departing from the scope of the invention, and various improvement and the variation carried out all belong to protection scope of the present invention.
Claims (9)
1. the process equipment of a copper aluminum composite pipeline includes the resistance welded lathe, and described resistance welded lathe is provided with: frame, workpiece clamping die, clamping cylinder, cooling water system and control system; Described workpiece clamping die is divided into discerptible two parts and forms, when two parts of described workpiece clamping die are closed, columniform cavity is promptly sealed in inside, and described copper aluminum composite pipeline to be processed is positioned in the described cavity, and described workpiece clamps the tight described copper aluminum composite pipeline to be processed of die clamp; Described clamping cylinder links to each other with described workpiece clamping die, drives the motion of workpiece clamping die; Be provided with the cooling water system circulating line in the described workpiece clamping die; It is characterized in that described resistance welded lathe also is provided with expander roll device and the expander roll promotion cylinder that is used to expand the copper pipe inner chamber, described expander roll device (7) includes expander roll (71), head (72) and a securing member expand.
2. the process equipment of copper aluminum composite pipeline according to claim 1, it is characterized in that, described workpiece clamping die is divided into discerptible upper and lower two parts and forms, described clamping cylinder is positioned at workpiece clamping die top vertically, described workpiece clamping die top is connected with described clamping cylinder, and the motion repeatedly by cylinder drives described workpiece clamping die top and moves up and down.
3. the process equipment of copper aluminum composite pipeline according to claim 1 and 2, it is characterized in that, described expander roll promotes cylinder and is connected with expander roll (71), described expander roll promotes cylinder and expander roll (71) is the horizontal direction setting, and the motion repeatedly of described expander roll promotion cylinder drives described expander roll (71) and moves horizontally.
4. method of using the process equipment worked copper aluminum composite pipeline of copper aluminum composite pipeline as claimed in claim 3, described copper aluminum composite pipeline closely is formed by connecting by welding manner by copper pipe and aluminum pipe, described copper pipe is connected in sequence by trunk line section, changeover portion and closing in section, the external diameter of the trunk line section of described copper pipe is more than or equal to the external diameter of described aluminum pipe, the internal diameter of described aluminum pipe is greater than the external diameter of the closing in section of described copper pipe, described aluminium pipe sleeve is located at the periphery of the changeover portion of described copper pipe and the section that closes up, and described processing method comprises the steps:
The first step: the periphery that aluminium pipe sleeve is located at the changeover portion of described copper pipe and the section that closes up;
Second step: the first half that clamps air cylinder driven workpiece clamping die moves downward first clamping work pieces aluminum pipe section;
The 3rd goes on foot: expander roll promotes cylinder and promotes the inner chamber that the expander roll device will put in copper pipe closing in section, and the inner chamber of copper pipe closing in section is expanded, and copper pipe external diameter and aluminum pipe internal diameter are combined closely, and after this workpiece copper pipe section is clamped;
The 4th step: the energising of resistance welded lathe, aluminum pipe and copper pipe contact portion produce a large amount of heats, and the aluminum pipe contact-making surface fuses gradually;
The 5th goes on foot: with the 4th while in step, expander roll promotes cylinder and promotes the inner chamber that the expander roll device withdraws from copper pipe closing in section;
The 6th step: cooling water system is to being cooled off near the copper aluminum composite pipeline fusion face;
The 7th step: the first half that clamps air cylinder driven workpiece clamping die moves upward, and unclamps workpiece;
The 8th step: each process equipment resets, and takes out product.
5. the copper aluminum composite pipeline of a processing method as claimed in claim 4 processing, closely be formed by connecting by welding manner by copper pipe and aluminum pipe, described copper pipe is by the trunk line section, the changeover portion and the section that closes up are connected in sequence, the external diameter of the trunk line section of described copper pipe is more than or equal to the external diameter of described aluminum pipe, the internal diameter of described aluminum pipe is greater than the closing in section external diameter of described copper pipe, described aluminium pipe sleeve is located at the periphery of the changeover portion of described copper pipe and the section that closes up, it is characterized in that, the front end face outer rim of the closing in section of described copper pipe, be provided with a circle back taper boss, the external diameter of described back taper boss leading section is equal to or slightly less than the internal diameter of described aluminum pipe, the external diameter of described back taper boss leading section is greater than the external diameter of the root of described back taper boss, the inner surface of described aluminum pipe and described copper pipe junction is a fusion face, and the shape of described fusion face is identical with the outer surface at this position of described copper pipe.
6. copper aluminum composite pipeline according to claim 5, it is characterized in that, described copper aluminum composite pipeline joint form is to adopt the copper pipe external diameter identical with aluminum pipe, the copper pipe of described copper aluminum composite pipeline joint comprises trunk line section (1), the changeover portion and the section that closes up, described changeover portion is scalene cone (12), described closing in section is cylinder section (13), a back taper boss of the front end band of copper pipe joint position post straight section (13) (14), described cylinder section (13) adopts scalene cone (12) to link to each other with copper pipe trunk line section (1), the inner surface of described aluminum pipe and described copper pipe junction is fusion face (3), and the shape of described fusion face (3) is identical with the outer surface at this position of described copper pipe.
7. copper aluminum composite pipeline according to claim 6 is characterized in that, described back taper boss (14) cross section be shaped as the conical surface.
8. copper aluminum composite pipeline according to claim 5, it is characterized in that, described copper aluminum composite pipeline joint form is to adopt the copper pipe external diameter identical with aluminum pipe, described copper pipe comprises trunk line section (4), changeover portion and closing in section, described changeover portion is reducing transition face (42), described closing in section is cylinder section (43), the front end band of copper pipe joint position cylinder section (43)
Individual back taper boss (44), described cylinder section (43) adopts reducing transition face (42) to link to each other with copper pipe trunk line section (4), the inner surface of described aluminum pipe and described copper pipe junction is fusion face (6), and the shape of described fusion face (6) is identical with the outer surface at this position of described copper pipe.
9. according to claim 6 or 8 described copper aluminum composite pipelines, it is characterized in that the external diameter of described cylinder section (43) is slightly less than the aluminum pipe internal diameter.
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| CNB200610035605XA CN100460129C (en) | 2006-05-25 | 2006-05-25 | Copper aluminum composite pipeline, processing equipment and its processing method |
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| CN102528255A (en) * | 2010-12-31 | 2012-07-04 | 左铁军 | V-shaped face copper and aluminium welding processing technique and welding connector used for power cables |
| CN102155592A (en) * | 2011-04-19 | 2011-08-17 | 大连海事大学 | End socket structure of copper and steel bimetallic pipe and seal welding method thereof |
| CN102513672B (en) * | 2011-12-30 | 2014-06-25 | 长城汽车股份有限公司 | Connecting rod sea automatic loading and welding device used for electric resistance welding |
| CN103170550B (en) * | 2013-04-10 | 2015-04-15 | 重庆龙煜精密铜管有限公司 | Connection method for copper coils for continuously unwinding bare packets |
| CN103846537B (en) * | 2014-03-26 | 2016-06-22 | 左铁军 | The welding method of different kinds of metal tubes |
| CN104588964B (en) * | 2014-12-29 | 2018-01-09 | 佛山晓世科技服务有限公司 | Dissimilar metal tubing and its preparation method and application |
| CN106112362A (en) * | 2016-08-26 | 2016-11-16 | 天津卡达克汽车高新技术公司 | A kind of breathing fixing device of sensor |
| CN107775288B (en) * | 2017-10-23 | 2019-05-14 | 中国航发成都发动机有限公司 | A kind of process for processing aero-engine tube assembly |
| CN115319253B (en) * | 2022-07-22 | 2023-12-05 | 芜湖市永大制冷配件有限责任公司 | Copper-aluminum resistance welding machine |
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| EP0126831A1 (en) * | 1983-05-25 | 1984-12-05 | O.L.S. S.r.l. | Copper-aluminium couplings |
| EP0457400B1 (en) * | 1990-05-17 | 1994-08-10 | Benito Bogni | Welding unit for metal pipes inserted one inside the other |
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