CN102284549A - Manufacturing method of aluminum-clad copper pipe having metallurgical bonding - Google Patents
Manufacturing method of aluminum-clad copper pipe having metallurgical bonding Download PDFInfo
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- CN102284549A CN102284549A CN2011102544868A CN201110254486A CN102284549A CN 102284549 A CN102284549 A CN 102284549A CN 2011102544868 A CN2011102544868 A CN 2011102544868A CN 201110254486 A CN201110254486 A CN 201110254486A CN 102284549 A CN102284549 A CN 102284549A
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Abstract
The invention provides a manufacturing method of an aluminum-clad copper pipe having metallurgical bonding, which comprises the following steps that: A, a copper pipe and an aluminum pipe straight pipe are prepared, and the aluminum pipe straight pipe is an aluminum pipe which is formed and squeezed by a squeezing machine; B, the inner surface of the aluminum pipe straight pipe is processed, and the outer surface of the copper pipe is processed; C, the copper pipe passes through the aluminum pipe straight pipe to obtain the aluminum-clad copper pipe blank, so the weight ratio of the copper is not more than 80 percent; and D, primary diameter and wall reduction and annealing are undertaken on the aluminum-clad copper pipe blank, the overall deformation rate is controlled above 60 percent, so the finished product of the aluminum-clad copper pipe is prepared. The aluminum pipe straight pipe is manufactured by the squeezing machine, so no weld seam of a weld pipe exists, the aluminum pipe straight pipe can well bear the mechanical processing without being broken, the extruded aluminum pipe straight pipe with ultra long large diameter can be made into a large aluminum-clad copper pipe, and because of the reduction processing and the annealing of the subsequent gates and the controlling of the deformation rate, the metallurgical bonding at the copper-aluminum joint is stable, the process flow is stable, and the mass production can be realized.
Description
Technical field
The present invention relates to the manufacturing field of metal composite pipe material, more specifically, relate to a kind of manufacture method of aluminum-cladding copper pipe.
Background technology
Aluminum-cladding copper pipe is applied in field of Refrigeration and Air-conditioning gradually, some nearest application achievements show, compare with traditional copper pipe, in the family expenses field of air conditioning, aluminum-cladding copper pipe has higher radiating efficiency, the air-conditioner that adopts aluminium copper-clad riffled tube to make has higher Energy Efficiency Ratio, believes the maturation more along with technology, and aluminum-cladding copper pipe might part substitute copper pipe fully.
Patent CN200610076037 has announced the copper aluminium composite tubing that a kind of copper aluminium composite tubing manufacture method and this method are made, this patent adopts planetary rolling machine that the copper aluminum composite pipes base is carried out single pass, and to process shrinkage factor then be 50%～95% heavy reduction rolling, the temperature liter of deformed area reaches 200～600 ℃ when rolling, this high temperature, at a high speed, heavy reduction rolling, make copper aluminum metal metallurgical binding, again through after the processing of passage, as stretching and annealing can be produced the aluminum-cladding copper pipe with metallurgical binding.Now, this method has been accomplished industrialized production, and millions of air-conditioners have been sold to market, and even to this day, this method still is the manufacture method of unique a kind of suitability for industrialized production aluminum-cladding copper pipe.But this method also has its limitation, and planetary rolling equipment drops into high, and drawn and rolled tube is short, aluminum-cladding copper pipe that can not rolling ultralong overweight, now, in this way the aluminum-cladding copper pipe of Sheng Chaning is no more than the 80kg/ dish, and these problems also hamper the continuation development of this industry.
Aluminum-cladding copper pipe for the production overlength, some units have proposed some new manufacture methods in succession, patent CN200810233430, announced a kind of way that adopts continuous extruder to coat certain thickness aluminium and aluminium alloy in the continuous extruding of copper pipe surface, this method can accomplish to coat aluminum pipe in theory on copper pipe, but the actual certain problem that has of using.This patent is at when extruding copper tube inner lining floating core head, during extruding the temperature of aluminum pipe between 450 ℃-550 ℃ and copper aluminium be in contact with one another.So high temperature can form the CuAl of fragility on copper aluminium interface
2, the CuAl of this fragility
2Can destroy the metallurgical binding between the copper aluminium, cause the delamination of copper aluminium.
Patent CN200810175815 discloses a kind of method of manufactured copper aluminium composite pipe, propose to adopt the method manufactured copper aluminium composite pipe of clad welded, the scheme that above-mentioned patent is made aluminum-cladding copper pipe is to adopt the method for clad welded that aluminium strip is coated on the copper pipe, carry out the drawing after annealing of back passage again and handle, make aluminum-cladding copper pipe.Adopt this patent can make the aluminum-cladding copper pipe of overlength, continuous drawing and heat treatment also can guarantee effective metallurgical binding between the copper aluminium, but owing to be with the aluminum pipe clad welded, there is a longitudinal seam on the aluminum pipe, organizing of tissue on this weld seam and matrix is different, exist a lot of defectives in the weld seam, this defective can be exaggerated in drawing process subsequently, when pulling to final light-wall pipe, the defective of weld seam can cause the quality of tubing not satisfy the requirement of using, and has large quantities of enlarging crackings and leakage phenomenon and produces.
Summary of the invention
In order to solve cost height in the existing aluminum-cladding copper pipe manufacturing technology, can't produce long tubing, easily to produce and leak and have problems such as weld defect is easy to crack or one of them, the invention provides a kind of manufacture method with aluminum-cladding copper pipe of metallurgical binding, the present invention is achieved by the following technical solutions:
The invention provides a kind of manufacture method, comprising with aluminum-cladding copper pipe of metallurgical binding:
A, preparation copper pipe and aluminum pipe straight tube, aluminum pipe straight tube are the aluminum pipes that adopts the extruder extrusion modling;
B, described aluminum pipe straight tube is carried out inner surface treatment, described copper pipe is carried out outer surface handle;
C, described copper pipe is penetrated in the described aluminum pipe straight tube, obtain the aluminum-cladding copper pipe pipe, and make the weight of copper and gross weight ratio be no more than 80%;
D, the tube reducing that described aluminum-cladding copper pipe pipe is carried out the back passage subtract wall processing and annealing, and the control total deformation rate makes the finished product of described aluminum-cladding copper pipe more than 60%.
Preferably, utilize the copper strips welding to produce described copper pipe, described welding method comprises gas tungsten arc welding, Laser Welding or ratio-frequency welding.
Further, described copper strips welding produces described copper pipe and described copper pipe is penetrated in the described aluminum pipe straight tube, finishes or separately finishes on a production line.
Preferably, described copper pipe is the no weld seam copper pipe that adopts rolling, extruding or Hubbing method to make.
Preferably, the internal surface treatment method of described aluminum pipe straight tube comprises wire brush bristle, abrasive material polishing, sandblast, shot-peening or chemical treatment, and the external surface treatment method of described copper pipe comprises wire brush bristle, sandblast or bead.
Preferably, the tube reducing of described back passage subtract wall be processed as directly pull out, directly pull out continuously, coil pull out, any combination of a kind of or these processing methods in the expander, spinning, tube rolling processing method, the tube reducing of described back passage subtracts wall processing and at room temperature carries out, and perhaps adopts temperature processing.
Preferably, described annealing comprises online induction annealing or heating furnace annealing.
Preferably, described aluminum pipe straight tube is to adopt horizontal extruder or continuous extruder to push to form.
Preferably, the length of described aluminum pipe straight tube is greater than 10m, and caliber is greater than 20mm, and wall thickness is greater than 1.5mm.
Preferably, the material of described aluminum pipe straight tube is an aluminum or aluminum alloy, and the material of described copper pipe is copper or copper alloy.
The manufacture method of aluminum-cladding copper pipe provided by the present invention has following advantage than prior art:
1, good product quality.
Horizontal extruding and continuously extruded all be ripe pressing method, the weld seam that produces when adopting the aluminum pipe of these two kinds of extrusion process manufacturings not have welded tube forming, this aluminum pipe can carry out the stretching of multi-pass and make thin-wall aluminium pipe, can bear machinings such as enlarging, bend pipe again after annealing.
The aluminum-cladding copper pipe that adopts the present invention to make, outer wall is an aluminum pipe, inwall is the brazing pipe or is no weld seam copper pipe.Generally speaking, for saving cost, the thickness of copper only is the part of the thickness of aluminium, as 1/6～1/4 etc., with Φ 9.52 * 0.4mm aluminum-cladding copper pipe is example, the thickness of its copper only is 0.08mm, the thickness of aluminium is 0.32mm, so thin copper layer can't bear enlarging processing, so when enlarging, aluminum-cladding copper pipe mainly is to bear expander processing by outer field aluminum pipe, and the weld seam that extruded aluminum tube produces during no welded tube moulding on the aluminum pipe circumference as in the previous paragraph, aluminum pipe is intact trapping spot on circumference, and this aluminum pipe itself can bear expander processing, thereby makes the aluminum-cladding copper pipe that adopts manufacturing of the present invention can fundamentally avoid the problem of enlarging cracking.As for the copper pipe that adopts welding method to make, though the longitudinal seam that stays when having welded tube forming on the copper pipe, because of aspect wall thickness, the copper layer is very thin, thereby also can not influence the use of aluminum-cladding copper pipe.
Another program of the present invention is directly to penetrate aluminum pipe after adopting no weld seam copper pipe outer surface to handle, the weld seam that stays when the copper pipe of surfaces externally and internally and aluminum pipe all do not have welded tube forming at this moment, in the process such as drawing of back passage, just can not produce because the weld defect that inner surface leakage aluminium that brazing pipe weld seam is caused and outer surface aluminium welded tube cause yet, this aluminum-cladding copper pipe has better resistance to corrosion and mechanical strength, be more suitable for making the light-wall pipe of wall thickness, but cost to there be certain rising less than 0.5mm.
2, can produce the heavy tubing of deep bid.
The present invention adopts bigbore aluminum pipe straight tube to produce aluminum-cladding copper pipe.Aluminum pipe length is greater than 10m, and caliber is greater than Φ 20mm, and wall thickness is greater than 1.5mm.Length is long more, and caliber is big more, and wall thickness is thick more, and every meter weight of tubing is just heavy more, just can produce the heavy product of bigger volume in short relatively place.
The aluminum pipe straight tube of great diameter and long, for example when Φ 50 * 3mm, length 100m, its aluminum-cladding copper pipe of making can surpass the 150kg/ dish.The increase that dish is heavy can be raised labour productivity, and reduces process residue ratio end to end, improves lumber recovery.As adopt traditional planetary rolling manufactured aluminum-cladding copper pipe, and process residue and adopts the present invention just about 15%, and when the process residue of aluminum pipe length of straight pipe during greater than 100m only is 5%, aluminum pipe is longer, and lumber recovery can be higher.
3, can adjust copper aluminium thickness ratio and weight ratio easily.
The thickness of conversion aluminum pipe or copper pipe can be adjusted the copper aluminium thickness ratio and the weight ratio of aluminum-cladding copper pipe easily.Adopt traditional planetary rolling method aluminum-cladding copper pipe, copper aluminum ratio relative fixed is adjusted difficulty relatively.
Copper pipe is thin more, and the use amount of copper is just more little, and cost is just low more.If the user wishes to increase the thickness of inwall copper layer, so that improve antiseptic power or other performance of aluminum-cladding copper pipe, the thickness of increase copper pipe that then can be suitable.But cost will have certain rising.
4, copper aluminium interface can reach stable metallurgical binding.
By the cleaning of aluminum pipe inner surface and copper pipe outer surface, back passage tube reducing subtracts wall processing and annealing, and controls total deformation rate more than 60%, and copper aluminium interface can reach stable metallurgical binding.
In the bimetallic complex technique, the contact-making surface of clean, alligatoring, enough deformation rates and suitable heat treatment are the factors that can the decision metal interface reach three most criticals of metallurgical binding.
In the extrusion process of aluminum pipe, the aluminum pipe inwall does not contact with profit.The inner wall cleaning of aluminum pipe can adopt the chemically treated method of wire brush bristle, abrasive material polishing, sandblast shot-peening or inner surface to carry out.The copper pipe outer surface also passes through surface treatment such as steel brush bristle.Satisfy copper aluminium contact-making surface and satisfy requirement clean, alligatoring.
Adopt directly pull out, directly pull out continuously, coil pull out, processing methods such as expander, spinning, tube rolling.The tube reducing of passage subtracts wall processing after can effectively carrying out tubing, and under the situation that the final products size is determined, initial aluminum pipe and copper pipe specification are big more, the deformation rate that is worked into final products is also just big more, when deformation rate surpasses 85%, only adopt the method for drawing, just can reach metallurgical binding.When the drawing deformation rate surpasses 60%, the method that adopts drawing and online induction annealing to combine, tubing also can reach metallurgical binding.
5, technological process is stable, is fit to produce in enormous quantities.
The extruding of aluminum pipe and continuously extruded, the welded tube of copper pipe, the manufacturing of no weld seam copper pipe and the tube reducing of tubing subtract wall processing and online annealing etc., the method of each operation all has the stable characteristics of flow process, therefore the present invention combines said method and makes aluminum-cladding copper pipe, also have the stable characteristics of technological process, be fit to large batch of industrial production.
Description of drawings
Fig. 1 shows the flow chart of the manufacture method of aluminum-cladding copper pipe provided by the present invention.
The specific embodiment
In order more to be expressly understood above-mentioned purpose of the present invention, feature and advantage, the present invention is further described in detail below in conjunction with the drawings and specific embodiments.
Set forth a lot of details in the following description so that fully understand the present invention, still, the present invention can also adopt other to be different from other modes described here and implement, and therefore, the present invention is not limited to the restriction of following public specific embodiment.
Fig. 1 shows the flow chart of the manufacture method of the aluminum-cladding copper pipe with metallurgical binding provided by the present invention.
As shown in Figure 1, the invention discloses a kind of manufacture method of aluminum-cladding copper pipe, comprise following processing step:
A, preparation copper pipe and aluminum pipe straight tube, aluminum pipe straight tube are the aluminum pipes that adopts the extruder extrusion modling;
B, the aluminum pipe straight tube is carried out inner surface treatment, copper pipe is carried out outer surface handle;
C, copper pipe is penetrated in the aluminum pipe straight tube, obtain the aluminum-cladding copper pipe pipe, and make the weight of copper and gross weight ratio be no more than 80%;
D, the tube reducing that the aluminum-cladding copper pipe pipe is carried out the back passage subtract wall processing and annealing, and the control total deformation rate makes described aluminum-cladding copper pipe finished product more than 60%.
The present invention utilizes extruder to make aluminum pipe, can make long aluminum pipe, and then make long aluminum-cladding copper pipe, such aluminum pipe does not have the welded tube weld seam, can be good at bearing machinings such as enlarging, bend pipe and can not ftracture, make that the aluminum-cladding copper pipe mass ratio that produces is better,, make that the metallurgical binding at copper aluminium interface is more stable because the tube reducing that multi-pass repeats subtracts wall processing and annealing.
Preferably, utilize the copper strips welding to produce copper pipe, welding method comprises gas tungsten arc welding (TIG), Laser Welding or ratio-frequency welding.
Use the method for welding copper strips to make copper pipe, can regulate the thickness of copper pipe, select the copper strips welding of respective thickness to get final product as required, use gas tungsten arc welding, Laser Welding or ratio-frequency welding, welding quality is relatively good.
Further, the copper strips welding produces copper pipe and copper pipe is penetrated the aluminum pipe straight tube, finishes or separately finishes on a production line.
Preferably, copper pipe is no weld seam copper pipe.It can be the seamless copper pipe that the method that adopts extruding, planetary oblique rolling to add drawing is again made common wall thickness.This copper pipe, wall thickness is thicker, and the aluminum-cladding copper pipe cost of manufacturing is higher.Consider the factor of cost, need to make ultra-thin seamless copper pipe that for example the diameter/thickness of copper pipe is in 80.Adopt the method for combinations such as expander, spinning and drawing can make this ultra-thin seamless copper pipe.Use seamless copper pipe to make the interior pipe of aluminium copper-clad, copper pipe does not have the welded tube weld seam.The aluminum-cladding copper pipe leakage aluminium phenomenon that no weld defect produces in drawing process, this aluminum-cladding copper pipe has better anti-corrosion capability and mechanical strength, more adapts to make the light-wall pipe of wall thickness less than 0.5mm.
Preferably, the internal surface treatment method of aluminum pipe straight tube comprises wire brush bristle, abrasive material polishing, sandblast, shot-peening or chemical treatment, and the external surface treatment method of copper pipe comprises wire brush bristle, sandblast or bead.
The inner surface of aluminum pipe straight tube and the outer surface of copper pipe are carried out surface treatment, are clean-up performance and roughness in order to increase contact-making surface, make the combination interface metallurgical binding of aluminium and copper more firm, eliminate contact deficiency.
Preferably, behind the aluminum-cladding copper pipe base tube reducing of passage subtract wall be processed as directly pull out, directly pull out continuously, coil pull out, processing method such as expander, spinning, tube rolling.A kind of processing method of repeated using that can be single, processing also can combine two or more processing methods.Processing is at room temperature carried out, and also can adopt temperature processing.
Drawing is the most frequently used method of tubing processing, and drawing adds man-hour tubing and mainly is subjected to tension, so when the drawing aluminum-cladding copper pipe, its every time deformation rate generally is no more than 40%.Excessive single pass drawing deformation rate can produce disconnected pipe.Reach final size, surpass 95%, just need the drawing of multi-pass as deformation rate sometimes.That adopts multi-pass directly pulls out and coils that the combination of pulling out subtracts wall to tubing and tube reducing processing is exactly a suitable selection continuously.In the drawing processing of aluminum-cladding copper pipe, because being the wall thickness addition by two tubing of copper aluminium, wall thickness forms, at this moment may produce the too thick and big inadequately situation of caliber of wall thickness, this situation can make tubing not have enough sizing reductions and the drawing of the floating core head of passage after influencing tubing.Can adopt the method for expander that aluminum-cladding copper pipe base pipe is carried out expander this moment.This expander can reduce or eliminate the gap between the copper aluminium, suitable increase base pipe caliber, and the wall thickness that the process of expander also can the attenuate copper pipe simultaneously, thus reduce cost.
Spinning and tube rolling can be used for also that as general pipes processing method aluminum-cladding copper pipe is carried out tube reducing and subtract wall processing, and above-mentioned all processing methods can at room temperature be carried out.Also can adopt temperature processing.
Preferably, annealing comprises online induction annealing or heating furnace annealing.Online induction annealing can be used as the intermediate annealing of drawing passes.If in drawing process, need not annealing, also can be used as final annealing.Heating furnace annealing only is used for final annealing.Annealing can be softened metal, eliminates residual stress, and crystal grain thinning is adjusted structure, eliminates tissue defects, uses the annealing of online induction annealing or heating furnace can better make aluminum bronze combination interface metallurgical binding.
Preferably, the aluminum pipe straight tube is to adopt horizontal extruder or continuous extruder to push to form.The aluminum pipe of extruding can be seamless aluminium tubing, also can be the seam extruded aluminum tube.Aluminum pipe can directly push the aluminium straight tube of overlength from extruder, also can be extruded into the aluminium coil pipe earlier, and scale is aligned into the aluminium straight tube again.
Preferably, the aluminum pipe straight tube is the seamless aluminium tubing of ultralong large caliber.Use the tubing of ultralong large caliber can be used for making the heavy aluminum-cladding copper pipe of overlength deep bid.Preferably, the length of aluminum pipe straight tube is greater than 10m, and caliber is greater than 20mm, and wall thickness is greater than 1.5mm.Pipe length is long more, and diameter and wall thickness are big more, and the efficient of production is just high more.
Preferably, the material of described aluminum pipe straight tube is an aluminum or aluminum alloy, and the material of described copper pipe is copper or copper alloy.
Manufacture method by aluminum-cladding copper pipe provided by the present invention, owing to do not have the welded tube weld seam on the aluminum pipe straight tube, so can be good at bearing machinings such as enlarging, bend pipe and can not ftracture, in addition because used the aluminum pipe straight tube of ultralong large caliber, can be used for making the heavy aluminum-cladding copper pipe of deep bid, the tube reducing of multi-pass subtracts wall processing and annealing, makes that the metallurgical binding at copper aluminium interface is more stable, is fit to produce in batches.
The invention will be further described below in conjunction with embodiment.
Embodiment 1:
1) adopt horizontal extruder to push the aluminum pipe of Φ 48 * 3mm, material is 3003, the online harvest aluminium coil pipe in extruding back, and again with aluminium coil pipe aligning, scale, cut lengths 150m, welding copper pipe postwelding specification Φ 40 * 0.6mm.
2) clean the aluminum pipe inner surface with water, clean the employing wire brush with water, a plurality of wire brush series connection are put in the aluminum pipe, repeatedly the brushing inner surface; Outer surface to copper pipe carries out bristle equally.
3) the online aluminum pipe that directly penetrates of the copper pipe behind the external surperficial bristle obtains the pipe of aluminum-cladding copper pipe, wears back pipe gross weight and is about 270kg.
4) the straight line drawing pipe of multi-pass to Φ 19.05 * 0.9mm deformation rate at this moment is 89%.
The weight of the copper of this aluminum-cladding copper pipe is 36.8% with the gross weight ratio, and mean specific gravity is 3.74, only is 42% of copper pipe.
The aluminum-cladding copper pipe length that manufacturing is come out according to present embodiment is long, the deformation rate height, and copper aluminium composition surface metallurgical binding is stable, cost is low, and outer tube is seamless aluminum pipe, the product quality height, the practicality height is annealed this pipe again, is efficiently managed the accessory pinna moulding, can be used as the efficient heat conducting tube of heat exchanger.
Embodiment 2:
1) adopt continuous extruder to push the aluminum pipe straight tube of Φ 60 * 2.5mm, material is a fine aluminium, on-line straightening during extruding, and aluminum pipe length 200m adopts the method for planetary rolling to prepare seamless bronze pan tube, and specification is Φ 50 * 1.5mm.
2) clean aluminum pipe straight tube inner surface with water.
3), make the pipe of aluminum-cladding copper pipe with the online aluminum pipe that directly penetrates of copper pipe uncoiling aligning back outer surface bristle.
4) with aluminum-cladding copper pipe base expander to Φ 61 * 3.9mm.
5) carry out directly the pulling out continuously of multi-pass, coil pull out and anneal after be machined to the last soft annealing of Φ 9.52 * 0.4mm and make finished product.
The aluminum-cladding copper pipe that manufacturing is come out according to present embodiment, copper layer thickness is 36% with respect to the thickness of whole aluminum-cladding copper pipe, and weight ratio is 63%, and mean specific gravity is 4.9, only is 55% of copper pipe, and the deformation rate of tubing is 98.3%, the heavily about 640kg of single coil.Present embodiment has used seamless copper pipe and the suitable increase wall thickness of copper pipe, the copper pipe of internal layer and outer field aluminum pipe all do not have the welded tube weld seam, in the drawing process in road, back, have effectively avoided inwall to leak the generation of aluminium phenomenon.The tubing of above-mentioned Φ 9.52 * 0.4mm is made forming internal threads after online annealing, alternative copper pipe is used for the heat-transfer pipe of heat exchanger of air condition.
In sum, manufacture method by aluminum-cladding copper pipe provided by the present invention, owing to do not have the welded tube weld seam on the aluminum pipe straight tube, so can be good at bearing machinings such as enlarging, bend pipe and can not ftracture, in addition because used the aluminum pipe straight tube of ultralong large caliber can be used for making the heavy aluminum-cladding copper pipe of overlength deep bid, because the tube reducing of back passage subtracts wall processing and annealing, make that the metallurgical binding at copper aluminium interface is stable again, be fit to produce in batches.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the manufacture method with aluminum-cladding copper pipe of metallurgical binding is characterized in that, comprises following processing step:
A, preparation copper pipe and aluminum pipe straight tube, described aluminum pipe straight tube are the aluminum pipes that adopts the extruder extrusion modling;
B, described aluminum pipe straight tube is carried out inner surface treatment, described copper pipe is carried out outer surface handle;
C, described copper pipe is penetrated in the described aluminum pipe straight tube, obtain the aluminum-cladding copper pipe pipe, and make the weight of copper and gross weight ratio be no more than 80%;
D, the tube reducing that described aluminum-cladding copper pipe pipe is carried out the back passage subtract wall processing and annealing, and the control total deformation rate makes the finished product of described aluminum-cladding copper pipe more than 60%.
2. the manufacture method of aluminum-cladding copper pipe according to claim 1 is characterized in that, utilizes the copper strips welding to produce described copper pipe, and described welding method comprises gas tungsten arc welding, Laser Welding or ratio-frequency welding.
3. the manufacture method of aluminum-cladding copper pipe according to claim 2 is characterized in that, described copper strips welding produces described copper pipe and described copper pipe is penetrated in the described aluminum pipe straight tube, finishes or separately finishes on a production line.
4. the manufacture method of aluminum-cladding copper pipe according to claim 1 is characterized in that, described copper pipe is the no weld seam copper pipe that adopts rolling, extruding or Hubbing method to make.
5. the manufacture method of aluminum-cladding copper pipe according to claim 1, it is characterized in that, the internal surface treatment method of described aluminum pipe straight tube comprises wire brush bristle, abrasive material polishing, sandblast, shot-peening or chemical treatment, and the external surface treatment method of described copper pipe comprises wire brush bristle, sandblast or bead.
6. the manufacture method of aluminum-cladding copper pipe according to claim 1, it is characterized in that, the tube reducing of described back passage subtract wall be processed as directly pull out, directly pull out continuously, coil pull out, any combination of a kind of or these processing methods in the expander, spinning, tube rolling processing method, the tube reducing of described back passage subtracts wall processing and at room temperature carries out, and perhaps adopts temperature processing.
7. the manufacture method of aluminum-cladding copper pipe according to claim 1 is characterized in that, described annealing comprises online induction annealing or heating furnace annealing.
8. the manufacture method of aluminum-cladding copper pipe according to claim 1 is characterized in that, described aluminum pipe straight tube is to adopt horizontal extruder or continuous extruder to push to form.
9. the manufacture method of aluminum-cladding copper pipe according to claim 7 is characterized in that, the length of described aluminum pipe straight tube is greater than 10m, and caliber is greater than 20mm, and wall thickness is greater than 1.5mm.
10. according to the manufacture method of the arbitrary described aluminum-cladding copper pipe of claim 1 to 9, it is characterized in that the material of described aluminum pipe straight tube is an aluminum or aluminum alloy, the material of described copper pipe is copper or copper alloy.
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| CN108453394A (en) * | 2017-01-10 | 2018-08-28 | 温州职业技术学院 | It is cut by laser the socket pipe preparation facilities combined with laser compound welding |
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