CN103736765A - Preparation method of micro-channel parallel flow aluminium tube - Google Patents
Preparation method of micro-channel parallel flow aluminium tube Download PDFInfo
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- CN103736765A CN103736765A CN201310653741.5A CN201310653741A CN103736765A CN 103736765 A CN103736765 A CN 103736765A CN 201310653741 A CN201310653741 A CN 201310653741A CN 103736765 A CN103736765 A CN 103736765A
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Abstract
The invention relates to a preparation method of a micro-channel parallel flow aluminium tube. The preparation method comprises following steps: 1) an aluminium rod is cleaned, and burrs on cross sections of the aluminium rod are removed; 2) the cleaned aluminium rod is delivered into a heating device for preheating treatment; 3) stripping of surface oxidation layers is performed using an aluminium rod stripping machine; 4) an extrusion die is preheated, the aluminium rod is delivered into the extrusion die in a continuous extruding machine, extrusion ratio is controlled at 200 to 700, and a parallel flow aluminium tube of a demanded size is obtained via extruding; 5) spraying of zinc layers; 6) cooling with water; 7) blowing; 8) drying; and 9) coiling and coil pipe is obtained. According to the preparation method, aluminium tube extrusion ratio is high, so that when size and wall thickness are the same, the micro-channel parallel flow aluminium tube possesses compact grain size, and is high in mechanical properties and compression strength, and corrosion resistance is especially higher; in addition extrusion ratio is high, and pressure is large, so that tissue defects and pore number of one-time extrusion product are reduced greatly, and integral quality of obtained product is increased.
Description
Technical field
The present invention relates to concurrent flow pipe manufacture technology field, be specifically related to a kind of manufacture craft of micro-channel parallel flow aluminum pipe.
Background technology
Along with the develop rapidly of auto industry, evaporimeter, condenser for car heat exchanger, the pipe sheet type structure that no longer adopts copper pipe aluminium foil to manufacture, but the flat flow structure that adopts multi void tubes and aluminum composite foil to manufacture, they have advantages of, and volume is little, lightweight, heat exchange performance is good.
Concurrent flow pipe is the critical material of full aluminium micro-channel heat exchanger, along with environmental protection, the high efficiency of automotive air-conditioning system cold-producing medium, to the requirement of withstand voltage of concurrent flow pipe, will be more and more higher, pollution-free CO of new generation
2the employing of cold-producing medium, again the withstand voltage of concurrent flow pipe had higher requirement, under the condition being equal at wall thickness, more than burst pressure will be brought up to 12MPa from 8MPa, but the concurrent flow pipe using is at present in weight, withstand voltage, the aspect such as durable is not desirable especially, and concurrent flow pipe is because of section configuration complexity, wall is thin, hole count is many, dimensional accuracy is high, extruding production difficulty is larger, at present domestic only have several enterprises producing, but all there is muscle cracking in product, after the bad and thin-walled property of seam, burst pressure is low, be mingled with pore more, the mass defects such as corrosion resistance is low, all the other all rely on from Japan, Korea S, the U.S., the national imports or produced by overseas-funded enterprise such as Germany.
Summary of the invention
The object of the invention is the deficiency for solving the problems of the technologies described above, a kind of manufacture craft of micro-channel parallel flow aluminum pipe is provided, the high and constant product quality of stable production process, production efficiency.
The present invention is the deficiency solving the problems of the technologies described above, and the technical scheme adopting is: a kind of manufacture craft of micro-channel parallel flow aluminum pipe, comprises the following steps:
1), choose aluminium bar, aluminium bar is cleaned in bar cleaning machine, remove aluminium bar surface and oil contaminant and dust, remove the burr of bar end face simultaneously;
2), the aluminium bar after cleaning is sent into heater and carried out the pre-heat treatment, its two ends temperature of the aluminium bar material after the pre-heat treatment reaches respectively 430 ℃～490 ℃ and 460 ℃～520 ℃;
3), using aluminum bar peeling machine to step 2) aluminium bar after the pre-heat treatment carries out divesting of surface oxide layer;
4), pre-hot-extrusion mold, the aluminium bar material then step 3) being obtained is sent in the extrusion die in continuous extruder, controls extrusion ratio and is 200～700 and push, and obtains the concurrent flow aluminum pipe of required size;
5), the upper and lower surface of the concurrent flow aluminum pipe that obtains in step 4) carries out spraying zinc processing, forms the spray zinc layer of one deck even compact, the thickness of spray zinc layer is 1～2 μ m;
6), concurrent flow aluminum pipe that step 5) is obtained be placed in the water of 15～30 ℃ carry out cooling, cool time≤5 second, in cooling procedure, aluminum pipe is all the time below liquid level;
7), cooled step 6) concurrent flow aluminum pipe is blown to processing, control blast is 0.5MPa, blow-time≤5 second;
8), the concurrent flow aluminum pipe after step 7) blowing is carried out to drying and processing, controlling temperature is 50 ℃, drying time≤5 second;
9), the concurrent flow aluminum pipe after step 8) oven dry is wound into coil pipe on winder;
Described step 2) in its two ends temperature of aluminium bar after the pre-heat treatment reach respectively 440 ℃ and 490 ℃.
Described step 2) in its two ends temperature of aluminium bar after the pre-heat treatment reach respectively 460 ℃ and 510 ℃.
The temperature that keeps extrusion die in described step 4) in extrusion process is 430 ℃, and keeping the temperature of the casing of laying mould is 500 ℃.
beneficial effect
Manufacture craft aluminum pipe extrusion ratio of the present invention large (200-700) therefore has grain size densification in the situations such as same size, wall thickness, and mechanical performance is higher, and compressive resistance is high, and particularly corrosion resistance is higher; And because extrusion ratio is large, extruding force is large, the tissue defects of an extruded product itself, pore etc. significantly reduce, and the total quality higher level of product, has better surface roughness.
The specific embodiment
A manufacture craft for micro-channel parallel flow aluminum pipe, comprises the following steps:
1), choose aluminium bar, aluminium bar is cleaned in bar cleaning machine, remove aluminium bar surface and oil contaminant and dust, remove the burr of bar end face simultaneously;
2), the aluminium bar after cleaning is sent into heater and carried out the pre-heat treatment, its two ends temperature of the aluminium bar material after the pre-heat treatment reaches respectively 430 ℃～490 ℃ and 460 ℃～520 ℃; Adding apparatus is the method that has adopted power frequency heat stepwise, set as required the heating-up temperature of each section, to obtain suitable thermograde, in extrusion process, along with the increase of extrusion time, the be squeezed effect of power of aluminium bar, temperature can raise, aluminium bar head and tail temperature inconsistent just balance this temperature rise, the extrusion temperature that is keeps balance.
3), using aluminum bar peeling machine to step 2) aluminium bar after the pre-heat treatment carries out divesting of surface oxide layer;
4), pre-hot-extrusion mold, the aluminium bar material then step 3) being obtained is sent in the extrusion die in continuous extruder, controls extrusion ratio and is 200～700 and push, and obtains the concurrent flow aluminum pipe of required size;
5), the upper and lower surface of the concurrent flow aluminum pipe that obtains in step 4) carries out spraying zinc processing, forms the spray zinc layer of one deck even compact, the thickness of spray zinc layer is 1～2 μ m;
6), concurrent flow aluminum pipe that step 5) is obtained be placed in the water of 15～30 ℃ carry out cooling, cool time≤5 second, in cooling procedure, aluminum pipe is all the time below liquid level;
7), cooled step 6) concurrent flow aluminum pipe is blown to processing, control blast is 0.5MPa, and blow-time≤5 second, to blow off surperficial moisture;
8), the concurrent flow aluminum pipe after step 7) blowing is carried out to drying and processing, controlling temperature is 50 ℃, drying time≤5 second, and drying and processing adopts is the hot-air seasoning of 50 ℃;
9), the concurrent flow aluminum pipe after step 8) oven dry is wound into coil pipe on winder;
Below specific embodiments of the invention:
embodiment 1
A manufacture craft for micro-channel parallel flow aluminum pipe, comprises the following steps:
1), choose aluminium bar, aluminium bar is cleaned in bar cleaning machine, remove aluminium bar surface and oil contaminant and dust, remove the burr of bar end face simultaneously;
2), the aluminium bar after cleaning is sent into heater and carried out the pre-heat treatment, its rear and front end thermograde of the aluminium bar material after the pre-heat treatment is 50 ℃, and front end temperature is 490 ± 10 ℃;
3), using aluminum bar peeling machine to step 2) aluminium bar after the pre-heat treatment carries out divesting of surface oxide layer;
4), pre-hot-extrusion mold, the aluminium bar material then step 3) being obtained is sent in the extrusion die in continuous extruder, controls extrusion ratio and is 200 and push, and obtains the concurrent flow aluminum pipe of required size; The temperature that keeps extrusion die in described step 4) in extrusion process is 430 ℃, and keeping the temperature of the casing of laying mould is 500 ℃.
5), the upper and lower surface of the concurrent flow aluminum pipe that obtains in step 4) carries out spraying zinc processing, forms the spray zinc layer of one deck even compact, the thickness of spray zinc layer is 1 μ m;
6), concurrent flow aluminum pipe that step 5) is obtained be placed in the water of 30 ℃ carry out cooling, cool time≤5 second, in cooling procedure, aluminum pipe is all the time below liquid level;
7), cooled step 6) concurrent flow aluminum pipe is blown to processing, control blast is 0.5MPa, blow-time≤5 second;
8), the concurrent flow aluminum pipe after step 7) blowing is carried out to drying and processing, controlling temperature is 50 ℃, drying time≤5 second;
9), the concurrent flow aluminum pipe after step 8) oven dry is wound into coil pipe on winder;
embodiment 2
A manufacture craft for micro-channel parallel flow aluminum pipe, comprises the following steps:
1), choose aluminium bar, aluminium bar is cleaned in bar cleaning machine, remove aluminium bar surface and oil contaminant and dust, remove the burr of bar end face simultaneously;
2), the aluminium bar after cleaning is sent into heater and carried out the pre-heat treatment, its rear and front end temperature of the aluminium bar material after the pre-heat treatment reaches respectively 510 ℃ and 460 ℃;
3), using aluminum bar peeling machine to step 2) aluminium bar after the pre-heat treatment carries out divesting of surface oxide layer;
4), pre-hot-extrusion mold, the aluminium bar material then step 3) being obtained is sent in the extrusion die in continuous extruder, controls extrusion ratio and is 500 and push, and obtains the concurrent flow aluminum pipe of required size; The temperature that keeps extrusion die in described step 4) in extrusion process is 430 ℃, and keeping the temperature of the casing of laying mould is 500 ℃.
5), the upper and lower surface of the concurrent flow aluminum pipe that obtains in step 4) carries out spraying zinc processing, forms the spray zinc layer of one deck even compact, the thickness of spray zinc layer is 1.4 μ m;
6), concurrent flow aluminum pipe that step 5) is obtained be placed in the water of 25 ℃ carry out cooling, cool time≤5 second, in cooling procedure, aluminum pipe is all the time below liquid level;
7), cooled step 6) concurrent flow aluminum pipe is blown to processing, control blast is 0.5MPa, blow-time≤5 second;
8), the concurrent flow aluminum pipe after step 7) blowing is carried out to drying and processing, controlling temperature is 50 ℃, drying time≤5 second;
9), the concurrent flow aluminum pipe after step 8) oven dry is wound into coil pipe on winder;
embodiment 3
A manufacture craft for micro-channel parallel flow aluminum pipe, comprises the following steps:
1), choose aluminium bar, aluminium bar is cleaned in bar cleaning machine, remove aluminium bar surface and oil contaminant and dust, remove the burr of bar end face simultaneously;
2), the aluminium bar after cleaning is sent into heater and carried out the pre-heat treatment, its rear and front end temperature of the aluminium bar material after the pre-heat treatment reaches respectively 500 ℃ and 460 ℃;
3), using aluminum bar peeling machine to step 2) aluminium bar after the pre-heat treatment carries out divesting of surface oxide layer;
4), pre-hot-extrusion mold, the aluminium bar material then step 3) being obtained is sent in the extrusion die in continuous extruder, controls extrusion ratio and is 500 and push, and obtains the concurrent flow aluminum pipe of required size; The temperature that keeps extrusion die in described step 4) in extrusion process is 430 ℃, and keeping the temperature of the casing of laying mould is 500 ℃.
5), the upper and lower surface of the concurrent flow aluminum pipe that obtains in step 4) carries out spraying zinc processing, forms the spray zinc layer of one deck even compact, the thickness of spray zinc layer is 2 μ m;
6), concurrent flow aluminum pipe that step 5) is obtained be placed in the water of 25 ℃ carry out cooling, cool time≤5 second, in cooling procedure, aluminum pipe is all the time below liquid level;
7), cooled step 6) concurrent flow aluminum pipe is blown to processing, control blast is 0.5MPa, blow-time≤5 second;
8), the concurrent flow aluminum pipe after step 7) blowing is carried out to drying and processing, controlling temperature is 50 ℃, drying time≤5 second;
9), the concurrent flow aluminum pipe after step 8) oven dry is wound into coil pipe on winder.
Claims (4)
1. a manufacture craft for micro-channel parallel flow aluminum pipe, is characterized in that: comprise the following steps:
1), choose aluminium bar, aluminium bar is cleaned in bar cleaning machine, remove aluminium bar surface and oil contaminant and dust, remove the burr of bar end face simultaneously;
2), the aluminium bar after cleaning is sent into heater and carried out the pre-heat treatment, its two ends temperature of the aluminium bar material after the pre-heat treatment reaches respectively 430 ℃～490 ℃ and 460 ℃～520 ℃;
3), using aluminum bar peeling machine to step 2) aluminium bar after the pre-heat treatment carries out divesting of surface oxide layer;
4), pre-hot-extrusion mold, the aluminium bar material then step 3) being obtained is sent in the extrusion die in continuous extruder, controls extrusion ratio and is 200～700 and push, and obtains the concurrent flow aluminum pipe of required size;
5), the upper and lower surface of the concurrent flow aluminum pipe that obtains in step 4) carries out spraying zinc processing, forms the spray zinc layer of one deck even compact, the thickness of spray zinc layer is 1～2 μ m;
6), concurrent flow aluminum pipe that step 5) is obtained be placed in the water of 15～30 ℃ carry out cooling, cool time≤5 second, in cooling procedure, aluminum pipe is all the time below liquid level;
7), cooled step 6) concurrent flow aluminum pipe is blown to processing, control blast is 0.5MPa, blow-time≤5 second;
8), the concurrent flow aluminum pipe after step 7) blowing is carried out to drying and processing, controlling temperature is 50 ℃, drying time≤5 second;
9), the concurrent flow aluminum pipe after step 8) oven dry is wound into coil pipe on winder.
2. the manufacture craft of micro-channel parallel flow aluminum pipe as claimed in claim 1, is characterized in that: described step 2) in its two ends temperature of aluminium bar after the pre-heat treatment reach respectively 440 ℃ and 490 ℃.
3. the manufacture craft of micro-channel parallel flow aluminum pipe as claimed in claim 1, is characterized in that: described step 2) in its two ends temperature of aluminium bar after the pre-heat treatment reach respectively 460 ℃ and 510 ℃.
4. the manufacture craft of micro-channel parallel flow aluminum pipe as claimed in claim 1, is characterized in that: the temperature that keeps extrusion die in described step 4) in extrusion process is 430 ℃, and keeping the temperature of the casing of laying mould is 500 ℃.
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| CN201310653741.5A CN103736765B (en) | 2013-12-09 | 2013-12-09 | A kind of manufacture craft of micro-channel parallel flow aluminum pipe |
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| CN103736765B CN103736765B (en) | 2016-01-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107008764A (en) * | 2016-01-28 | 2017-08-04 | 湖南恒佳铝业有限公司 | Air conditioning for automobiles and the cooling microchannel aluminium flat conduit continuous extruding technology of domestic air conditioning |
| CN109834129A (en) * | 2017-11-28 | 2019-06-04 | 佛山市三水集新精密管材有限公司 | A kind of aluminium dish pipe production method |
| CN110976543A (en) * | 2019-12-16 | 2020-04-10 | 广东和胜工业铝材股份有限公司 | Sectional-speed extrusion process of aluminum alloy |
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| JPH09174144A (en) * | 1995-12-26 | 1997-07-08 | Tanaka Kikinzoku Kogyo Kk | Method for cooling extrusion product and device therefor |
| CN201862650U (en) * | 2010-08-16 | 2011-06-15 | 无锡市凯利铝业有限公司 | Combined mould for hot extrusion of parallel flow flat pipe |
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2013
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Patent Citations (5)
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| JPH09174144A (en) * | 1995-12-26 | 1997-07-08 | Tanaka Kikinzoku Kogyo Kk | Method for cooling extrusion product and device therefor |
| CN201862650U (en) * | 2010-08-16 | 2011-06-15 | 无锡市凯利铝业有限公司 | Combined mould for hot extrusion of parallel flow flat pipe |
| CN102641912A (en) * | 2012-05-11 | 2012-08-22 | 江苏亚太轻合金科技股份有限公司 | Technology for continuously extruding coils by aluminum and aluminum alloy parallel flow pipes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107008764A (en) * | 2016-01-28 | 2017-08-04 | 湖南恒佳铝业有限公司 | Air conditioning for automobiles and the cooling microchannel aluminium flat conduit continuous extruding technology of domestic air conditioning |
| CN107008764B (en) * | 2016-01-28 | 2019-06-14 | 湖南恒佳铝业有限公司 | Air conditioning for automobiles and the cooling microchannel aluminium flat conduit continuous extruding technology of domestic air conditioning |
| CN109834129A (en) * | 2017-11-28 | 2019-06-04 | 佛山市三水集新精密管材有限公司 | A kind of aluminium dish pipe production method |
| CN110976543A (en) * | 2019-12-16 | 2020-04-10 | 广东和胜工业铝材股份有限公司 | Sectional-speed extrusion process of aluminum alloy |
| CN110976543B (en) * | 2019-12-16 | 2021-06-08 | 广东和胜工业铝材股份有限公司 | Sectional-speed extrusion process of aluminum alloy |
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| CN103736765B (en) | 2016-01-20 |
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Effective date of registration: 20210721 Address after: 467500 No. 2 Jiancai Road, Ruzhou City, Pingdingshan City, Henan Province Patentee after: Henan Runze Light Alloy Technology Co.,Ltd. Address before: 467500 industrial cluster of Ruzhou City, Pingdingshan City, Henan Province Patentee before: HENAN QIDELONG INDUSTRIAL Co.,Ltd. |
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