CN103003655A - Internally grooved aluminum alloy heat transfer pipe - Google Patents
Internally grooved aluminum alloy heat transfer pipe Download PDFInfo
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- CN103003655A CN103003655A CN2011800342643A CN201180034264A CN103003655A CN 103003655 A CN103003655 A CN 103003655A CN 2011800342643 A CN2011800342643 A CN 2011800342643A CN 201180034264 A CN201180034264 A CN 201180034264A CN 103003655 A CN103003655 A CN 103003655A
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- heat
- transfer pipe
- pipe
- fin
- inner face
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
- F28F1/325—Fins with openings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
- B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
- B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/12—Fastening; Joining by methods involving deformation of the elements
- F28F2275/125—Fastening; Joining by methods involving deformation of the elements by bringing elements together and expanding
Abstract
Disclosed is a heat transfer pipe which rarely suffers from crushing of fins and which exhibits excellent corrosion resistance and permits a reduction in wall thickness. An internally grooved aluminum alloy heat transfer pipe, characterized by: having multiple ridge-shaped fins on the inner surface; and containing 0.8 to 1.8 mass% of Mn ("mass%" is hereinafter abbreviated to "%"), 0.3 to 0.8% of Cu, and 0.3 to 1.0% of Si, with the remainder consisting of Al and unavoidable impurities.
Description
[technical field]
The present invention relates to a kind of aluminum inner face trough of belt heat-transfer pipe, its can be used as domestic air conditioner, commercial air conditioner, heat pump water heater etc. the intersection finned type heat exchanger heat-transfer pipe and be used.
[background technology]
General intersection finned (another name is fin tube type) heat exchanger (Fig. 1), that heat-transfer pipe is inserted in the through hole of aluminium radiating fin upper shed, fill in afterwards expander with external diameter large than its internal diameter to heat-transfer pipe inside and with plug the diameter of heat-transfer pipe is carried out expander, make the outer peripheral face of heat-transfer pipe and the through hole of aluminium radiating fin closely engage (expander processing, with reference to Fig. 2), then, to bend to the heat-transfer pipe that the aluminium radiating fin forms as one hair clip shape, other heat-transfer pipe (U word pipe) that bends to the U font will be engaged to finish (non-patent literature 1) with gas brazing.
A kind of relevant motion that is used for the heat-transfer pipe of intersection finned type heat exchanger is arranged in the prior art, namely, carry out heat exchange by making to flow through as the HFC of cold-producing medium etc. in the pipe, use at the pipe inner face and to have the copper heat-transfer pipe that cross sectional shape is trapezoidal or leg-of-mutton ridge type fin (below, be called the inner face grooved pipe.), realize high efficiency and the energy-saving of heat exchanger, and stipulated the degree of depth, the wall thickness (wall thickness of ridge type fin basal part) of groove between ridge type fin as shown in Figure 4, the shape (drift angle etc.) of fin, or the various heat-transfer pipes (for example being patent documentation 1) of the lead angle of ridge type fin as shown in Figure 5 (angle of arranging with respect to the fin of pipe range edge direction).Heat transfer property for the inner face grooved pipe is outstanding, is considered to because the inboard surface area of pipe increases compared to smooth tubes, and forms uniform cold-producing medium liquid film (non-patent literature 2) by this groove in pipe.
At the pipe inner face of inner face grooved pipe, generally pipe (smooth tubes) is rolled the fin that processing forms continuously arranged in the shape of a spiral ridge type.As rolling processing method, insert the band slot plug that rotates freely in the known oriented pipe, and on one side make its planetary rotation from managing the roller that outer propelling rotates freely, the rotary rolling mill method (with reference to Fig. 3) of tube drawing on one side, or replace the push the ball ball of mechanism of roller setting to roll processing method (non-patent literature 1, patent documentation 2).
So far, the inner face grooved pipe mainly adopts the copper based material of copper and copper alloy etc., but reduces fee of material and light-weighted requirement in order to adapt to, and is just studying the aluminium based material that adopts aluminum or aluminum alloy etc. (below, be called aluminium alloy).
But aluminium alloy is compared with the copper based material, and the corrosion protection of inferring aluminium alloy is relatively poor.Therefore, for example in patent documentation 3, proposed a kind of heat-transfer pipe to be made 2 layers of structure, wherein, it is alloy that inner tube layer adopts Al-Mn, coats the motion that Al-Zn is the inner face grooved pipe of alloy as sacrificing lumarith on the outer surface layer.
Perhaps, in patent documentation 4, it is alloy that someone motion uses the internal layer of heat-transfer pipe to adopt the Al-Mn of A3003 etc., and it is the inner face grooved pipe of alloy and the heat exchanger that uses this inner face grooved pipe that outer surface layer adopts as the Al-Zn that sacrifices lumarith and coat A7072 etc.
On the other hand, except the corrosion protection problem, in the situation of these aluminum inner face grooved pipes being carried out expander processing, closely engaged inadequate phenomenon owing to can be positioned at the top of the ridge type fin that has of pipe inner face by the phenomenon of the what is called of breakage " fin is damaged ", fin shape damage or aluminium radiating fin, thereby cause occurring to obtain the problem of desired heat transfer property.This is because the strength of materials of the inner face grooved pipe of aluminum or aluminium alloy system is more made of copper low.
The problem that adds fin breakage in man-hour for solving expander, having proposed in the patent documentation 5 to form thickness at the aluminum pipe inner face is the scheme of the oxide-film more than the 5 μ m.
Also have, proposed in the patent documentation 6 to use be formed with ridge type fin, internal layer is made of the large aluminium alloy layer of mechanical strength, and coats the scheme of the aluminum inner face grooved pipe of the little aluminium lamination of mechanical strength at the skin of this aluminium alloy layer.As concrete alloy, lifting has internal layer to adopt the A3003 aluminium alloy, the outer example that adopts A1050 (fine aluminium).In with document, also having disclosed the periphery side pipe bottom wall portion that is made of A1050 is out of shape at first and makes the external diameter expander, and the deflection of the interior all side pipe bottom wall portion that are made of A3003 is little, even therefore carry out expander processing, also the breakage of the projection fin of its inner face can be controlled within the allowed band.
And, in patent documentation 7, proposed as the outstanding inner face grooved pipe of tube expanding workability, the cladding material employing Al-Mn that has used at aluminum pipe is the high-intensity alloy that adds Zn in the alloy (A3000 is alloy), the Al-Mn of side employing within it is alloy (A3000 is alloy), and adopting high-intensity Al-Mg-Si alloy (A6000 is alloy) or Al-Mg in the internal layer parts of inside is the scheme of 3 layers of cage walls of alloy (A5000 is alloy).
[prior art document]
[patent documentation]
[patent documentation 1] Japanese Patent Application Laid-Open 2003-287383 communique
The flat 4-262818 communique of [patent documentation 2] Japanese Patent Application Laid-Open
[patent documentation 3] Japanese Patent Application Laid-Open 2000-121270 communique
[patent documentation 4] Japanese Patent Application Laid-Open 2009-250562 communique
[patent documentation 5] Japanese Patent Application Laid-Open 2000-205782 communique
The flat 11-351791 communique of [patent documentation 6] Japanese Patent Application Laid-Open
[patent documentation 7] Japanese Patent Application Laid-Open 2008-266738 communique.
[non-patent literature]
[non-patent literature 1] her rattan is just clear: conduct heat 42,174 (2003), 3
The rugged clear husband of [non-patent literature 2] rock he: R﹠amp; D Kobe Steel skill newspaper 50,3 (2000), 66.
[summary of the invention]
[problem that invention will solve]
Yet still there is room for improvement in the following areas in the prior art that above-mentioned document is put down in writing;
The first, at patent documentation 1,2, in the non-patent literature 1 and 2, aluminium alloy is used in the situation of heat-transfer pipe, the problem of anticorrosion and fin breakage does not improve.
The second, record the method for the corrosion protection that improves heat-transfer pipe in the patent documentation 3 and 4, but the problem of fin breakage does not improve yet.
The 3rd, record the method for the fin breakage that improves heat-transfer pipe in the patent documentation 5～7, but still have in the following areas room for improvement.That is, in patent documentation 5, the operation as form oxide-film in inside has increased anodal oxidation processes etc., causes like this processing charges to increase substantially, thereby and unrealistic.And carry out in general this kind processing itself in long tube inside just very difficult.
In patent documentation 6, need to make wall thickness ratio as outer field aluminum layer be thicker than A3003 alloy-layer as internal layer.In disclosed two examples, outer with respect to the A1050 of 0.8mm, its A3003 internal layer is 0.2mm in the embodiment with document, or outer with respect to the A1050 of 0.7mm, and its A3003 internal layer is 0.3mm, and major part is made of A1050.But this kind formation can make self intensity step-down of pipe, therefore for the compression strength of the interior pressure that obtains to resist cold-producing medium, needs to use the pipe of heavy wall, but can increase fee of material like this and uneconomical.
In the patent documentation 7, owing to used 3 layers of cage walls, therefore, its manufacturing process is complicated, and productivity ratio and yield rate are also low, thereby processing charges also can uprise thereupon.
In view of above problem, mechanically carry out expander processing even the object of the present invention is to provide with plug, also be difficult to occur the aluminium alloy inner face trough of belt processed heat-transfer pipe of fin breakage.Perhaps, provide a kind of heat-transfer pipe that is difficult to occur the fin breakage, and can realize the aluminium alloy inner face trough of belt processed heat-transfer pipe of good corrosion protection, thin-walled property.
[technological means of dealing with problems]
The present inventor finds that following heat-transfer pipe can solve problems of the prior art, and has finished the present invention through the research of the pious heart;
Namely, a kind of aluminium alloy provided by the present invention inner face trough of belt processed heat-transfer pipe, its inner face is formed with the fin of a plurality of ridge types, and by contain Mn:0.8～1.8 quality % (below, quality % is recited as %), Cu:0.3～0.8%, Si:0.3～1.0%, remainder are that the material of Al and inevitable impurity consists of.
Consist of according to this, can obtain to be difficult to occur the heat-transfer pipe of fin breakage.
In addition, the present invention also provides a kind of aluminium alloy inner face trough of belt processed heat-transfer pipe, its inner face is formed with the fin of a plurality of ridge types, and by containing Mn:0.8～1.8%, Cu:0.3～0.8%, Si:0.3～1.0%, contain further that Fe:0.60% is following, the following Zn:0.30% of Mg:0.20% following, Cr:0.20% is following, Ti:0.20% is following, Zr:0.20% is with lower one kind or two or more, to be Al consist of with the material of inevitable impurity remainder.
Consist of according to this, can obtain to be difficult to occur the heat-transfer pipe of fin breakage.
In addition, the present invention also provides the heat exchanger that possesses above-mentioned any one heat-transfer pipe.
Consist of according to this, owing to possess the heat-transfer pipe that is difficult to occur the fin breakage, can obtain the outstanding heat exchanger of heat transfer property.
In addition, the present invention also provides the air conditioner that possesses above-mentioned any one heat-transfer pipe.
Consist of according to this, owing to possess the heat-transfer pipe that is difficult to occur the fin breakage, can obtain the outstanding air conditioner of heat transfer property.
[invention effect]
Aluminium alloy of the present invention inner face trough of belt processed heat-transfer pipe mechanically carries out expander processing even possess with plug, also is difficult to occur the effect of fin breakage.Perhaps, possess and be difficult to occur the fin breakage, and good corrosion protection is arranged, can realize thin-walled property and can control the effect of fee of material.
[description of drawings]
Fig. 1 is the partial enlarged drawing of intersection finned type heat exchanger;
Fig. 2 is the figure of expression plug method of expanding;
Fig. 3 is the figure that represents for example rolling processing apparatus;
Fig. 4 is the ideograph in the cross section of expression inner face grooved pipe;
Fig. 5 is the ideograph of the lead angle of expression inner face ridge fin.
[specific embodiment]
Below, embodiments of the present invention are elaborated.For identical content, for avoiding the loaded down with trivial details of repetition, carried out that suitable description thereof is omitted.
＜embodiment 1: heat-transfer pipe 〉
(1-1) composition
The heat-transfer pipe that sets in the present embodiment is the heat exchanger towards the use in refrigeration system of average family, for example can be that external diameter is φ 4.0～φ 9.54mm, and diapire is thick to be small diameter thin-walled about 0.3～0.6mm.Therefore, among various aluminium alloys, what adopt is to possess suitable intensity, and small diameter thin-walled processability (extruding property, stretching, rolling property) outstanding Al-Mn is that A3003 alloy (alloy that is comprised of Al, 1.0～1.5% Mn, 0.05～0.20% Cu) as base-material, adds element by regulating, obtain under the prerequisite of not destroying processability, to improve intensity, and prevent the aluminium alloy of the fin breakage that expander processing causes.
The heat-transfer pipe that present embodiment provides, it is the fin that inner face is formed with a plurality of ridge types, and by contain Mn:0.8～1.8 quality % (below, quality % is recited as %), Cu:0.3～0.8%, Si:0.3～1.0%, remainder are the aluminium alloy inner face trough of belt processed heat-transfer pipes that the material of Al and inevitable impurity consists of.This heat-transfer pipe such as following embodiment confirm, can play the effect that is difficult to occur the fin breakage.This heat-transfer pipe because the compression strength of pipe is high, therefore can reduce fee of material according to its thin-walled property.This heat-transfer pipe is owing to need not to adopt complicated production technique and special construction, and is therefore outstanding at aspects such as productivity ratio and quality.
Even this heat-transfer pipe is formed with the fin of a plurality of ridge types at inner face, and by containing Mn:0.8～1.8%, Cu:0.3～0.8%, Si:0.3～1.0%, contain further that Fe:0.60% is following, Mg:0.20% following, Zn:0.30% is following, Cr:0.20% is following, Ti:0.20% is following, Zr:0.20% is with lower one kind or two or more composition, remainder is the aluminium alloy inner face trough of belt processed heat-transfer pipe that the material of Al and inevitable impurity consists of, and also can play identical effect.
Aluminium alloy described here is the alloy take Al as main component.The content of Al in the aluminium alloy for example is 90～99.9%.The content of Al for example is 90,91,92,93,94,95,96,97,98,99,99.5, or is 99.9%.The content of Al is also here in the scope between illustrated any 2 numerical value.As alloy series, applicable have by 3000 alloys that are of JIS3003, the representatives such as 3004 with by 6000 alloys that are of JIS6061, the representatives such as 6063.
Then, will the restriction reason of the heat-transfer pipe composition in the present embodiment be described:
Mn is to be can put forward high-intensity main adding elements in the alloy 3000, by solid solution in aluminium, and separate out a part and produce the effect that makes alloy have intensity, when its addition is less than 0.8%, abundant as the insufficient strength of heat-transfer pipe, and more than 1.8% the time, it is saturated that intensity improves effect, thereby cause the quantitative change of thick intermetallic compound many, and in the manufacturing process of pipe, the problem of breaking easily etc.Therefore, 0.8～1.8% scope that the Mn addition is made as is good, and preferred scope is 1.0～1.5%.
Cu has solid solution in aluminium and can further put forward high-intensity effect and not affect the element of processability.When if the Cu addition is less than 0.3%, can cause the insufficient strength of alloy abundant, thereby can not prevent by the caused groove of mechanicalness expander damaged, and when the Cu addition more than 0.8% the time, extruding property, stretching corrosion protection can reduce.Therefore, 0.3～0.8% scope that the addition of Cu is made as is good, and preferred scope is 0.4～0.6%.
If Al-Mn-Cu contains Si in the alloy, then can form the intermetallic compound of Al-Mn-Si system or Al-Mn-Si-Cu system, having further raising Al-Mn-Cu is the effect of the intensity of alloy, and Si is the element that does not affect processability.When the addition of Si was less than 0.3%, the insufficient strength of alloy was abundant, thereby can not prevent that the groove that caused by the mechanicalness expander is damaged, when the addition of Si more than 1.0% the time, extruding property, stretching, corrosion protection can reduce.Therefore, 0.3～1.0% scope that the Si addition is made as is good, and preferred scope is 0.4～0.6%.
As impurity Fe, Mg, Zn etc. are arranged, and these impurity are Fe is below 0.6%, Mg is below 0.2%, Zn is 0.3% when following, can not affect effect of the present invention.The angle that never affects effect of the present invention considers that the containing ratio of these impurity is more few better.There is no particular limitation to the lower limit of the containing ratio of these magazines, for example, can be more than 0.01,0.001 or 0.0001, also can be 0%.
And because Ti, Cr, Zr have the effect of even granular ingot bar tissue, so it is also better to contain these elements in the alloy, if but content surpasses 0.2%, then can form huge intermetallic compound, or cause the decline of extruding property, therefore content is made as below 0.2% as good.There is no particular limitation to the lower limit of the containing ratio of these elements, for example, can be more than 0.01,0.001 or 0.0001, also can be 0%.
(1-2) fin
In the present embodiment, the hardness of ridge fin also can be HV (Vickers hardness; Vickers-hardness) more than 35.This is damaged in expander processing in order to prevent fin.In order to control hardness, particularly, when suitably adjusting the combination (being the height combination in the composition range basically) of the addition of Mn, Cu, Si, anneal and the management of conventional operation that can superheated etc. gets final product.In addition, when the hardness of ridge fin be HV35 when above, plastic deformation can not occur owing to add man-hour ridge fin at expander before expander processing, so the hardness of expander after processing can not change yet.
(1-3) sacrifice lumarith
When supposing that in coastal salt damage area etc. heat-transfer pipe with present embodiment is used for the heat exchanger of off-premises station, also can lumarith arrange pure Al or Al-Zn is alloy-layer as sacrificing in the outside of heat-transfer pipe.Be formed with the heat-transfer pipe in the embodiment of the invention of sacrificing lumarith, because damaged two aspects of corrosion protection and fin are all outstanding, therefore can be used as high-quality heat-transfer pipe.
With respect to total wall thickness, these thickness of sacrificing lumarith are preferably 5～30%.When the thickness of sacrificing lumarith during with respect to total wall thickness discontented 5%, the effective life that is used in the sacrifice lumarith on the heat exchanger is not enough, if surpass 30%, can make the intensity decline of heat-transfer pipe, thereby be difficult to realize thin-walled property.This ratio for example is 5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29 or 30%, and this ratio can be the value in the scope between any two values that this enumerates.
For the composition of sacrificing lumarith, be that alloy is poor as long as its natural potential is compared to the Al-Mn-Si-Cu of core, for example, can suitably use the Al-Zn alloy of the fine aluminium of A1050 etc. or A7072 (Al-0.8～1.3%Zn alloy) etc.
Then, the embodiment of the formation method of sacrificing lumarith is illustrated:
To sacrifice non-corrosive alloy sheet material (pure Al or Al-Zn are alloy) and bend to cylindric and it is coated on the cylindric blank outside and the Al-Mn-Si-Cu that made in the heat-transfer pipe of present embodiment is the combination blank of alloy, will make up afterwards blank and be heated to 350～600 ℃ and the processing that homogenizes with heating furnace.Should make up blank is clamped between extrusion die and the pressure ram head (Ram nose) and inserts in the container, under the state of having fixed extrusion die and pressure ram head (Ram nose), push external diameter greater than the plug of core internal diameter, with the core expander to extrude the air between core and skin material.Then plug is fixed in fixed position, hollow extrusion depression bar (hollow stem) is advanced and extrudes the combination blank by mould, coat extruded tubes thereby obtain 2 layers.Then, this extruded tube is carried out stretch process with external diameter, the wall thickness of stipulating, and obtain the pipe (smooth tubes) of 2 layers of clad structure.This stretch process is preferably used drawing block (draw block) the formula continuous broaching machine of high productivity.
Perhaps, can be with the blank heating to 350 of sacrifice corrosion protection material cylindraceous～600 ℃, and within it face hot charging core hollow cylindraceous blank and 2 layers of hollow blank obtaining, after this hollow blank of extrusion process, similarly carry out again stretch process, can obtain thus the pipe (smooth tubes) of 2 layers of clad structure.
Perhaps, also can arrange in the single face side of aluminium alloy core sheet and coat rolling and sacrifice 2 layers of covering piece that corrosion protection material sheet forms, this covering piece is carried out rolling forming and makes tubulose, then the interface of this covering piece of welding and make the electric slit-tube of 2 layers of clad structure.
Discussed above is by coating extruding, stretching, or the coating rolling forms the formation method of 2 layers of pipe (smooth tubes) of sacrificing lumarith, but as additive method, also can use the Al-Mn-Si-Cu in the heat-transfer pipe of present embodiment is alloy extruded tube (hot extrusion or continuously extruded (Conform Extrusion)), perhaps to after the stretching pipe spraying Zn, carry out Zn diffusion heat treated, thereby form the method for Al-Zn diffusion layer.In such cases, preferably set the temperature and time of suitable diffusion heat treated, the thickness that makes the Zn diffusion layer with respect to the thickness of full wall in 5～30% scope.Industrial, the temperature that spreads heat treated probably is made as 400～500 ℃, the processing time of spreading heat treated is made as about 2～8 hours as preferred.In addition, in the situation that adopts the Zn spraying process, also can after carrying out the rolling processing of aftermentioned, carry out again Zn spraying and diffusion heat treated.
In addition, become easily for making the rolling processing as subsequent handling, in the above described manner the pipe (smooth tubes) that is formed with the sacrifice lumarith is carried out annealing softening in advance and be treated to good.In this case, annealing conditions is made as 300～400 ℃, it is industrial preferred that the time was made as about 2～8 hours.
And in follow-up rolling processing, the external diameter of these smooth tubes and wall thickness have minimizing to a certain degree.Therefore, consider the amount that can reduce, set the size (external diameter, wall thickness) of pipe larger than the size of the inner face grooved pipe of final products.
Then, roll processing method etc. with rotary rolling mill method or ball smooth tubes is rolled processing, and make the inner face grooved pipe that possesses ridge type fin.
(1-4) structure and machining method
The inner face grooved pipe of present embodiment, can manufacture various sizes according to the purposes of heat exchanger, but be used in the situation of domestic air conditioner, consider from the angle of the productivity ratio of making pipe, the preferred external diameter of inner face grooved pipe is that φ is more than 4.0, consider that from the miniaturization of heat exchanger, light-weighted angle the preferred external diameter of inner face grooved pipe is below the φ 9.54mm.This external diameter for example can be 4.0,5.0,6.0,6.35,6.5,7.0,7.5,8.0,8.5,9.0 or 9.54mm.This external diameter also can be the value in the scope between any 2 values of enumerating at this.
And, thick about diapire, consider from the aspect of compressive resistance, be preferably more than 0.3, consider from the miniaturization of heat exchanger, light-weighted aspect, be preferably below the 0.6mm.This diapire is thick for example can be 0.30,0.35,0.40,0.45,0.50,0.55 or 0.60mm, also can be the value in the scope between any 2 values of enumerating at this.
In addition, the height H of inner face ridge fin is preferably 0.1～0.4mm, the apex angle α of inner face ridge fin is preferably 10～40 °, and the number of inner face ridge fin is preferably more than 40, and lift angle β (inner face ridge fin and pipe range angle that edge direction is) is preferably more than 20 °.
After implementing rolling processing, also can implement annealing softening and process.This be for eliminate when rolling by cause into machining deformation, thereby make hair clip bending machining (serpentine bend processing) become easy.According to rule, get final product in about 2～8 hours annealing of 300～400 ℃ of lower enforcement of temperature.
The inner face grooved pipe of the present embodiment that makes so closely engages with the through hole of aluminium radiating fin by expander processing.For obtaining good tight zygosity, suitably set the gap between through hole and the heat-transfer pipe, so that pipe expanding rate (external diameter increment rate) becomes about 4～6%.And, replace the mechanical pipe expanding method with plug, also can adopt with oil pressure or hydraulic pressure pipe is applied the hydraulic extend pipe method of interior pressure, can enhance productivity by such method.
＜embodiment 2: heat exchanger 〉
Other embodiment of the present invention relates to the heat exchanger that possesses the described heat-transfer pipe of above-mentioned embodiment.This heat exchanger is owing to possess the heat-transfer pipe that is difficult to occur the fin breakage, so good heat-transfer, and efficiency is outstanding.And this heat exchanger is owing to possess and be difficult to occur the fin breakage, and the outstanding heat-transfer pipe of corrosion protection, so heat transfer property and durability are outstanding.
＜embodiment 3: air conditioner 〉
Other embodiment of the present invention also relates to the air conditioner that possesses the described heat-transfer pipe of above-mentioned embodiment.This air conditioner is owing to possess the heat-transfer pipe that is difficult to occur the fin breakage, so good heat-transfer, and efficiency is outstanding.And this air conditioner is owing to possess and be difficult to occur the fin breakage, and the outstanding heat-transfer pipe of corrosion protection, so heat transfer property and durability are outstanding.
More than, the working of an invention mode is narrated, but these only are illustration of the present invention that the present invention also can adopt above-mentioned in addition various formations.
[embodiment]
Then, based on embodiment the present invention is described in more details:
Cast out the aluminum alloy round tubular blank of the composition formation that has shown in the table 1, and made the extruded tube of external diameter φ 47mm, wall thickness 3.5mm by the indirect extrusion method.With drawing block formula continuous broaching machine machine this extruded tube is carried out stretch process, and made the stretching pipe of external diameter φ 10mm, wall thickness 0.45mm.
[table 1]
[table 1]
For the No8 that is formed with the sacrifice lumarith～14, No21～26, with the blank heating to 450 of the sacrifice corrosion protection materials cylindraceous such as A1050 or A7072 ℃, and the cylindric core blank of side hot charging and made 2 layers of hollow blank within it, this hollow blank is carried out indirect extrusion, carry out stretch process with drawing block formula continuous broaching machine machine afterwards, thereby similarly made the stretching pipe of external diameter φ 10mm, wall thickness 0.48mm.
The annealing softening that the stretching pipe that makes has like this carried out under 360 ℃ 2 hours is processed, the connector that inserts afterwards float-valve plug (floating), connecting rod, is integrated with slot plug, and make connector pass through floating die assembly, processing head, shaping dies, and pay groove processing at inner face, thus having made external diameter: φ 7mm, diapire are thick: the number of the height H of 0.35mm, ridge fin: 0.22mm, ridge fin is 50, apex angle α: 15 °, lift angle β: 35 ° inner face grooved pipe.In addition, for No8～14, No21～26, reach 0.035mm (thick with respect to diapire is 10% ratio), the sotck thinkness of having regulated the sacrifice corrosion protection material in extrusion process for making the thickness of sacrificing lumarith.And the annealing softening that finally carried out under 360 ℃ 2 hours is processed and has been made the inner face grooved pipe.
In order to estimate the characteristic of the related inner face grooved pipe of the embodiment of the invention that makes like this and comparative example, carried out following test.Acquired results is as shown in table 2.
[table 2]
[table 2]
(a) tension test
For measuring the intensity of inner face grooved pipe, implemented tension test according to JIS Z2241.
(b) tube expanding workability
Carried out expander processing with the steel plug, so that the external diameter of the inner face grooved pipe of above-mentioned external diameter φ 7mm increases by 5%.Afterwards, observe the cross section of pipe, and measure the reduction of ridge fin height H, estimated thus the fin breakage.For obtaining the heat-transfer character as heat exchanger, this fin breakage is preferably below 0.01mm.In addition, use micro Vickers to measure the hardness of the cross section central portion of the ridge fin before and after the expander processing.
(c) corrosion protection
In order to estimate outside corrosion protection, according to JIS Z8681 the CASS that each inner face grooved pipe has carried out 1500 hours is tested.After the test, remove the surface corrosion product of probe tube, the corrosion condition of observation tube afterwards, and estimated outside corrosion protection according to having or not of through hole.
clearly illustrate such as table 2, the reduction (fin breakage) of the ridge fin height H of aluminum inner face grooved pipe No1～No14 of the present invention is below the 0.01mm, wherein the hardness of the ridge fin section before the expander is that the fin breakage of HV35 above No3～No7, No10～No14 is zero, so corrosion protection is very good.And, be formed with the No8～No14 that sacrifices lumarith, do not see the generation of through hole, therefore outside corrosion protection is good.And, the tensile strength of aluminum inner face grooved pipe No1～No14 of the present invention is more than the 118MPa, even compare with the tensile strength 97MPa (being equivalent to A3003) of comparative example No16, the intensity of inner face grooved pipe No1～No14 is also high, thereby the compressive resistance of pipe is also high, therefore can realize the cost effect that thin-walled property brings.
With respect to this, Mn, Cu, No15～No17, No21～No23 that the Si amount is few, the breakage of the ridge fin when expander is large, and the intensity of managing self is also low.Otherwise Mn, Cu, many No18～No20, the No24～No26 of Si amount have occured to break in stretching process and rolling process, thereby can't make the inner face grooved pipe.
More than, describe the present invention according to embodiment.Be appreciated that these embodiment only are illustration, the present invention can also have various variation, and those variation also within the scope of the invention.
[symbol description]
1 aluminium radiating fin
2 heat-transfer pipes (inner face grooved pipe)
3 louvres
4 expander plugs (plug)
5 pipes (smooth tubes)
6 rolling heads
7 rotating rollers
8 inner face hurricane band barrels
9 ridge fins
10 sacrifice lumarith.
Claims (8)
1. aluminium alloy inner face trough of belt processed heat-transfer pipe, it is characterized in that: inner face is formed with the fin of a plurality of ridge types, and contain Mn:0.8～1.8 quality % (below, quality % is designated as %), Cu:0.3～0.8%, Si:0.3～1.0%, remainder is made of with inevitable impurity Al.
2. aluminium alloy inner face trough of belt processed heat-transfer pipe, it is characterized in that: inner face is formed with the fin of a plurality of ridge types, and contain Mn:0.8～1.8%, Cu:0.3～0.8%, Si:0.3～1.0%, contain further that Fe:0.60% is following, Mg:0.20% following, Zn:0.30% is following, Cr:0.20% is following, Ti:0.20% is following, the one kind or two or more composition of Zr:0.20% among following, remainder is made of with inevitable impurity Al.
3. heat-transfer pipe as claimed in claim 1 or 2, it is characterized in that: the hardness of the fin of described ridge type is more than the HV35.
4. heat-transfer pipe as claimed in claim 1 or 2 is characterized in that: the corrosion protection material is formed with pure Al layer or Al-Zn is alloy-layer as sacrificing on the outer surface.
5. heat-transfer pipe as claimed in claim 1 or 2, wherein, the external diameter of this heat-transfer pipe is 4.0～9.54mm.
6. heat-transfer pipe as claimed in claim 1 or 2 is characterized in that: the thick 0.3～0.6mm of being of the diapire of this heat-transfer pipe.
7. heat exchanger, it possesses: heat-transfer pipe as claimed in claim 1 or 2.
8. air conditioner, it possesses: heat-transfer pipe as claimed in claim 1 or 2.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-158849 | 2010-07-13 | ||
| JP2010158849 | 2010-07-13 | ||
| PCT/JP2011/065906 WO2012008463A1 (en) | 2010-07-13 | 2011-07-12 | Internally grooved aluminum alloy heat transfer pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103003655A true CN103003655A (en) | 2013-03-27 |
Family
ID=45469460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800342643A Pending CN103003655A (en) | 2010-07-13 | 2011-07-12 | Internally grooved aluminum alloy heat transfer pipe |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6154610B2 (en) |
| KR (1) | KR20130043659A (en) |
| CN (1) | CN103003655A (en) |
| MY (1) | MY173745A (en) |
| WO (1) | WO2012008463A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112738A (en) * | 2015-09-28 | 2015-12-02 | 亚太轻合金(南通)科技有限公司 | High-strength anticorrosion aluminum alloy and preparation process thereof |
| CN105499430A (en) * | 2015-12-08 | 2016-04-20 | 安阳方快锅炉有限公司 | Processing method of inner finned tube of boiler |
| CN105543575A (en) * | 2015-12-21 | 2016-05-04 | 无锡市世达精密焊管制造有限公司 | Aluminum alloy plate ingot rich in silicon, copper and titanium elements and preparation method thereof |
| CN108344322A (en) * | 2018-03-28 | 2018-07-31 | 长沙格力暖通制冷设备有限公司 | Finned heat exchanger and air conditioner |
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| JP5877739B2 (en) * | 2012-03-15 | 2016-03-08 | 株式会社Uacj | Aluminum alloy flat tube for heat exchanger and method for producing the same, heat exchanger core and method for producing the same |
| WO2013153972A1 (en) * | 2012-04-13 | 2013-10-17 | 古河スカイ株式会社 | Heat exchange tube attached with aluminum alloy inner groove |
| CN105890433B (en) * | 2016-04-25 | 2018-03-13 | 江苏金源腾峰换热设备有限公司 | A kind of bimetallic aerial cooler titanium alloy fin and its handling process |
| JP6283069B2 (en) * | 2016-07-05 | 2018-02-21 | 三菱アルミニウム株式会社 | Heat exchanger |
| CN107575657A (en) * | 2017-10-24 | 2018-01-12 | 陕西海恩得工贸有限公司 | A kind of corrosion-resistance heat exchanger titanium tube |
| CN107619970A (en) * | 2017-10-26 | 2018-01-23 | 江苏亚太安信达铝业有限公司 | Aluminium alloy for domestic air conditioning composite pipe and preparation method thereof |
| JP7011479B2 (en) | 2018-01-31 | 2022-01-26 | Ｅｎｅｏｓ株式会社 | Hydrocarbon oil manufacturing method |
| CN112254563A (en) * | 2019-07-22 | 2021-01-22 | 海德鲁铝业(苏州)有限公司 | Long-life aluminum alloy having high corrosion resistance and spiral grooved tube produced from the alloy |
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| CN105499430A (en) * | 2015-12-08 | 2016-04-20 | 安阳方快锅炉有限公司 | Processing method of inner finned tube of boiler |
| CN105543575A (en) * | 2015-12-21 | 2016-05-04 | 无锡市世达精密焊管制造有限公司 | Aluminum alloy plate ingot rich in silicon, copper and titanium elements and preparation method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20130043659A (en) | 2013-04-30 |
| JP6154610B2 (en) | 2017-06-28 |
| WO2012008463A1 (en) | 2012-01-19 |
| JPWO2012008463A1 (en) | 2013-09-09 |
| MY173745A (en) | 2020-02-18 |
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