CN1810402A - Fast 7075 aluminium alloy shape extruding process - Google Patents
Fast 7075 aluminium alloy shape extruding process Download PDFInfo
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- CN1810402A CN1810402A CN 200510002497 CN200510002497A CN1810402A CN 1810402 A CN1810402 A CN 1810402A CN 200510002497 CN200510002497 CN 200510002497 CN 200510002497 A CN200510002497 A CN 200510002497A CN 1810402 A CN1810402 A CN 1810402A
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Abstract
The present invention discloses the fast extrusion process of type-7075 aluminum alloy shape suitable for use in different extruders of different sizes to produce aluminum alloy shape with homogeneous cooling and no extruded crack in high extrusion speed. The present invention features the hot extrusion process of producing type-7075 aluminum alloy shape in circular, rectangular or other cross section shape, and the cooling of extruding mold and extruded shape in the mold outlet with gaseous or liquid nitrogen to realize fast extrusion. During the extrusion, the flow rate of gaseous or liquid nitrogen is controlled with valve to 1-30 L/min, the nitrogen pipes are in the number and distribution determined by different cross section shape of the extruded shape, and extrusion speed is 4-12 m/min.
Description
Technical field
The present invention relates to the non-ferrous metal processing method, be more particularly to the quick pressing method of 7075 aluminium alloy extrusions.
Background technology
Because the performance of 7075 aluminium alloys own has determined under conventional extruding condition, it is very fast that too fast extrusion speed makes that the section bar temperature raises, produce on section bar surface easily and periodically push extrusion defects such as crackle and Deformation structure be inhomogeneous, thereby the extrusion speed that allows is very low, generally in 0.5～2 meter/minute scope, low like this extrusion speed has seriously restricted the raising of 7075 aluminium alloy extrusions production efficiencys.Therefore, up to the present, also there is not the quick pressing method of a kind of 7075 aluminium alloy extrusions to produce.
Summary of the invention
Technical problem to be solved by this invention is to overcome deficiency of the prior art, provides a kind of 7075 aluminium alloy extrusions quick pressing method.Can be successfully squeeze out high-quality 7075 aluminium alloy extrusions fast by this method with 4～12 meters/minute speed.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The quick pressing method of a kind of 7075 aluminium alloy extrusions, it is characterized in that adopting thermal extrusion moulding method to produce 7075 aluminium alloy extrusions, the quick extruding of aluminium alloy extrusions is to realize by the section bar that cools off extrusion die and mould outlet place in extrusion process respectively, the cross sectional shape of above-mentioned section bar is circular, rectangle or other geometry, wherein cross sectional shape is that square or circle are good especially.
The quick pressing method of aluminium alloy extrusions as previously discussed, when it is characterized in that pushing, earlier logical cooling medium cooling extrusion die, logical again cooling medium cooling section bar when treating the outlet of section bar outflow extrusion die.
The quick pressing method of aluminium alloy extrusions as previously discussed, used cooling medium is nitrogen or liquid nitrogen when it is characterized in that cooling off extrusion die and section bar.
The quick pressing method of aluminium alloy extrusions as previously discussed, effect is better when it is characterized in that cooling off extrusion die and selecting cooling medium to be nitrogen, and effect was better when the cooling extrudate selected cooling medium to be liquid nitrogen.
The quick pressing method of aluminium alloy extrusions as previously discussed is characterized in that, the interface of logical nitrogen or liquid nitrogen is fixedly mounted on the extruding die-cushion, can be by online adjusting nitrogen of regulating the qi flowing in the channels valve or liquid nitrogen flow.
The quick pressing method of aluminium alloy extrusions as previously discussed is characterized in that, adjusting nitrogen or liquid nitrogen flow are meant nitrogen or liquid nitrogen flow are adjusted to 1～30 liter/minute.
The quick pressing method of aluminium alloy extrusions as previously discussed, it is characterized in that cooling off section bar and be meant even cooling extrudate, when the different section bar of extruding cross sectional shape, being used to of arranging on the extruding die-cushion cools off the air inlet pipe quantity of extrudate and distributes also inequality.
The quick pressing method of aluminium alloy extrusions as previously discussed is characterized in that aluminium alloy is a state of plastic deformation in the extrusion process, and 7075 aluminium alloy extrusions extruded velocities are 4～12 meters/minute.
By online adjusting nitrogen of regulating the qi flowing in the channels valve or liquid nitrogen flow, evenly cooled off extrudate, prevent that extrusion defects such as crackle from appearring periodically pushing in the section bar surface; According to the needs of even cooling extrudate, the different section bar of extruding cross sectional shape, the air inlet pipe quantity and the distribution thereof of the cooling extrudate of arranging on the extruding die-cushion are also inequality.
Compared with prior art, effect of the present invention and benefit are:
1, provide a kind of effective 7075 aluminium alloy extrusions quick pressing method, this method has taken into full account the metallic character and the crimp machining characteristics of 7075 superduralumin alloys, and cooling evenly, prevent fracture or fusing, can squeeze out high-quality 7075 aluminium alloy extrusions;
2, this method is applicable to various tonnage extruders, by online adjusting nitrogen of regulating the qi flowing in the channels valve or liquid nitrogen flow, makes to prevent that extrusion defects such as crackle from appearring periodically pushing in the section bar surface by evenly cooling extrudate;
3, cooling is 1～30 liter/minute with the flow of nitrogen or liquid nitrogen, and aluminium alloy is a state of plastic deformation in the extrusion process, and the section bar extruded velocity can be up to 4～12 meters/minute.
Description of drawings
Fig. 1 is the present invention's 7075 aluminium alloy extrusions schematic diagram of device of extruding fast;
Fig. 2 is the I-I cutaway view of Fig. 1, and this figure is applicable to that the extruding cross sectional shape is circular section bar, and 3 air inlet pipe that are used to cool off extrudate are mutually 120 ° and distribute symmetrically.
1. recipients among the figure, 2. extrusion axis, 3. dummy block, 4. aluminium alloy casting rod, 5. extrusion die, 6. extruding die-cushion, the 7. air inlet pipe of cooling extrusion die, the 8. air inlet pipe of cooling extrudate, 9.7075 aluminum alloy extrusion section bars.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:
Embodiment 1
The quick pressing method of 7075 aluminium alloy extrusions, the step of this method is as follows:
1, design 7075 aluminium alloy extrusions product cross section figure earlier, manufacture and design extrusion die 5 and extruding die-cushion 6 etc. according to the section bar sectional view again, and reserved location installation cooling medium air inlet pipe, 2200 tonnage extruders selected; Extrusion ratio is 26;
2, the cross sectional shape of section bar is circular, and diameter is 32mm.The air inlet pipe of cooling usefulness has 4, and wherein 1 is used to cool off extrusion die; Other 3 extrudates that are used for the cooling die exit, and the three is mutually 120 ° and distributes symmetrically, as shown in Figure 2;
3, according to 7075 al alloy component requirements, melting and casting goes out the 7075 aluminium alloys casting rod 4 of diameter than recipient 1 little 1～2mm, in the homogeneous stove, carry out carrying out surperficial railway carriage after the homogenising heat treatment, remove surface oxide layer, wherein the homogenization temperature of aluminium alloy casting rod 4 is 370 ℃～460 ℃, and the time is 16～28h, and the surperficial railway carriage degree of depth is 1～2mm;
4, be ready to thermocouple that bottled nitrogen and liquid nitrogen, thermometric use etc.;
5, connect 4 bottles of bottled cooling mediums and air inlet pipe 7,8 respectively, wherein 1 bottle is used to cool off extrusion die 5,3 bottles of aluminium alloy extrusions 9 that are used for the cooling die exit in addition, the medium of cooling extrusion die is bottled nitrogen, the medium of cooling extrudate is bottled liquid nitrogen;
6, preheating recipient 1, extrusion axis 2, dummy block 3, aluminium alloy casting rod 4, extrusion die 5 and extruding die-cushion 6, preheat temperature is 310 ℃～390 ℃, and extrusion die 5, extruding die-cushion 6 etc. is put in the recipient 1, carries out the preceding preparation of extruding;
7, begin to push the process of 7075 aluminium alloy extrusions, earlier logical nitrogen cooling extrusion die 5 treats that section bar 9 horse back after die orifice flows out connects cooled with liquid nitrogen section bar 9; Temperature with thermocouple measurement extrusion die 5 and outlet section bar 9, flow by regulating the qi flowing in the channels valve regulated cool nitrogen and liquid nitrogen is 1～30 liter/minute then, extrusion die 5 temperature are controlled at 360 ℃～390 ℃, aluminium alloy extrusions 9 temperature are controlled at 370 ℃～410 ℃, and the section bar extrusion speed is at 4～12 meters/minute.
Embodiment 2
The cross section that changes " medium of cooling extrusion die is bottled liquid nitrogen; the medium of cooling extrudate is bottled nitrogen " and section bar respectively into except the cooling medium that adopts when cooling extrusion die and extrudate in the 5th step wherein can change square, rectangle or other geometry respectively into outside one of them, and all the other are identical with the step of embodiment 1.
Claims (8)
1, the quick pressing method of a kind of 7075 aluminium alloy extrusions, it is characterized in that adopting thermal extrusion moulding method to produce 7075 aluminium alloy extrusions, the quick extruding of aluminium alloy extrusions is to realize by the section bar that cools off extrusion die and mould outlet place in extrusion process respectively, the cross sectional shape of above-mentioned section bar is circular, rectangle or other geometry, wherein cross sectional shape is that square or circle are good especially.
2, the quick pressing method of aluminium alloy extrusions according to claim 1, when it is characterized in that pushing, earlier logical cooling medium cooling extrusion die, logical again cooling medium cooling section bar when treating the outlet of section bar outflow extrusion die.
3, the quick pressing method of aluminium alloy extrusions according to claim 2, used cooling medium is nitrogen or liquid nitrogen when it is characterized in that cooling off extrusion die and section bar.
4, the quick pressing method of aluminium alloy extrusions according to claim 3, effect is better when it is characterized in that cooling off extrusion die and selecting cooling medium to be nitrogen, and effect was better when the cooling extrudate selected cooling medium to be liquid nitrogen.
5, the quick pressing method of aluminium alloy extrusions according to claim 3 is characterized in that the interface of logical nitrogen or liquid nitrogen is fixedly mounted on the extruding die-cushion, can be by online adjusting nitrogen of regulating the qi flowing in the channels valve or liquid nitrogen flow.
6, the quick pressing method of aluminium alloy extrusions according to claim 5 is characterized in that, adjusting nitrogen or liquid nitrogen flow are meant nitrogen or liquid nitrogen flow are adjusted to 1～30 liter/minute.
7, the quick pressing method of aluminium alloy extrusions according to claim 2, it is characterized in that cooling off section bar and be meant even cooling extrudate, when the different section bar of extruding cross sectional shape, being used to of arranging on the extruding die-cushion cools off the air inlet pipe quantity of extrudate and distributes also inequality.
8, the quick pressing method of aluminium alloy extrusions according to claim 1 is characterized in that aluminium alloy is a state of plastic deformation in the extrusion process, and 7075 aluminium alloy extrusions extruded velocities are 4～12 meters/minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100024971A CN100346892C (en) | 2005-01-25 | 2005-01-25 | Fast 7075 aluminium alloy shape extruding process |
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| CNB2005100024971A CN100346892C (en) | 2005-01-25 | 2005-01-25 | Fast 7075 aluminium alloy shape extruding process |
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| CN100346892C CN100346892C (en) | 2007-11-07 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101700538B (en) * | 2009-11-04 | 2011-09-07 | 北京华盛荣镁业科技有限公司 | Composite cooling device and system for metal extrusion |
| CN102909229A (en) * | 2012-10-30 | 2013-02-06 | 浙江瑞金铜铝型材有限公司 | Forming process of 7003 aluminum alloy sections |
| CN103157691A (en) * | 2013-03-28 | 2013-06-19 | 江苏金苇电气科技有限公司 | Copper flat wire processing method |
| CN103191946A (en) * | 2013-03-27 | 2013-07-10 | 江苏格林威尔金属材料科技有限公司 | Process for manufacturing aluminum-alloy internally-round porous parallel flow pipe |
| CN103394538A (en) * | 2013-08-06 | 2013-11-20 | 浙江瑞金铜铝型材有限公司 | Molding and aging technology of 7A04 superhard aluminum alloy section bar |
| CN103643181A (en) * | 2013-11-29 | 2014-03-19 | 福建省南平铝业有限公司 | Online forced-cooling and quenching device of aluminum alloy extrusion material |
| CN104073608A (en) * | 2014-07-11 | 2014-10-01 | 北京有色金属研究总院 | Multilevel waste heat quenching system |
| CN104781428A (en) * | 2012-10-12 | 2015-07-15 | 曼彻斯特铜产品有限责任公司 | Systems and methods for cooling extruded materials |
| CN106624672A (en) * | 2016-12-19 | 2017-05-10 | 重庆市九明机械制造有限公司 | Chain wheel production method |
| CN107282676A (en) * | 2017-05-22 | 2017-10-24 | 东莞市超美铝制品有限公司 | The method and cooling mould of a kind of nitrogen making machine nitrogen at room cooling mould |
| CN108500076A (en) * | 2018-05-22 | 2018-09-07 | 浙江海亮新材料有限公司 | A kind of device and method accurately controlling aluminium section hot-extrusion die local temperature |
| CN109158437A (en) * | 2018-09-29 | 2019-01-08 | 广东和胜新能源汽车配件有限公司 | A kind of press quenching device based on reverse extrusion bar |
| CN114247766A (en) * | 2021-12-27 | 2022-03-29 | 亚太轻合金(南通)科技有限公司 | Aluminum product extrusion device |
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| JPS6457911A (en) * | 1987-08-28 | 1989-03-06 | Sumitomo Light Metal Ind | Extruding method for aluminum |
| JPH02127916A (en) * | 1988-11-04 | 1990-05-16 | Showa Alum Corp | Manufacture of 7000 group al alloy extruded material suppressing surface recrystallization |
| JPH03138018A (en) * | 1989-10-24 | 1991-06-12 | Iwatani Internatl Corp | Cooling method of die for extrusion of soft aluminum |
| JPH03243211A (en) * | 1990-02-19 | 1991-10-30 | Mitsui Mining & Smelting Co Ltd | Indirectly extruding method |
| JPH05104131A (en) * | 1991-10-18 | 1993-04-27 | Furukawa Alum Co Ltd | Method for controlling flow rate of cooling medium in extrusion press |
| JP2609785B2 (en) * | 1992-06-10 | 1997-05-14 | 昭和アルミニウム株式会社 | Extrusion dies |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101700538B (en) * | 2009-11-04 | 2011-09-07 | 北京华盛荣镁业科技有限公司 | Composite cooling device and system for metal extrusion |
| CN104781428A (en) * | 2012-10-12 | 2015-07-15 | 曼彻斯特铜产品有限责任公司 | Systems and methods for cooling extruded materials |
| CN102909229A (en) * | 2012-10-30 | 2013-02-06 | 浙江瑞金铜铝型材有限公司 | Forming process of 7003 aluminum alloy sections |
| CN103191946B (en) * | 2013-03-27 | 2015-11-18 | 江苏格林威尔金属材料科技有限公司 | Round Multi-hole parallel flow pipe manufacturing process in aluminium alloy |
| CN103191946A (en) * | 2013-03-27 | 2013-07-10 | 江苏格林威尔金属材料科技有限公司 | Process for manufacturing aluminum-alloy internally-round porous parallel flow pipe |
| CN103157691A (en) * | 2013-03-28 | 2013-06-19 | 江苏金苇电气科技有限公司 | Copper flat wire processing method |
| CN103394538A (en) * | 2013-08-06 | 2013-11-20 | 浙江瑞金铜铝型材有限公司 | Molding and aging technology of 7A04 superhard aluminum alloy section bar |
| CN103643181A (en) * | 2013-11-29 | 2014-03-19 | 福建省南平铝业有限公司 | Online forced-cooling and quenching device of aluminum alloy extrusion material |
| CN104073608A (en) * | 2014-07-11 | 2014-10-01 | 北京有色金属研究总院 | Multilevel waste heat quenching system |
| CN106624672A (en) * | 2016-12-19 | 2017-05-10 | 重庆市九明机械制造有限公司 | Chain wheel production method |
| CN107282676A (en) * | 2017-05-22 | 2017-10-24 | 东莞市超美铝制品有限公司 | The method and cooling mould of a kind of nitrogen making machine nitrogen at room cooling mould |
| CN108500076A (en) * | 2018-05-22 | 2018-09-07 | 浙江海亮新材料有限公司 | A kind of device and method accurately controlling aluminium section hot-extrusion die local temperature |
| CN109158437A (en) * | 2018-09-29 | 2019-01-08 | 广东和胜新能源汽车配件有限公司 | A kind of press quenching device based on reverse extrusion bar |
| CN114247766A (en) * | 2021-12-27 | 2022-03-29 | 亚太轻合金(南通)科技有限公司 | Aluminum product extrusion device |
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| CN100346892C (en) | 2007-11-07 |
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Owner name: GUANGDONG HUAWEI ALUMINUM PRODUCTS CO., LTD. Free format text: FORMER OWNER: GUANGDONG XINGFA GROUP CO., LTD. Effective date: 20071026 |
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Effective date of registration: 20071026 Address after: 528061, No. 23, Ho Man Road, Nanzhuang Town, Chancheng District, Guangdong, Foshan Patentee after: GUANGDONG XINGFA ALUMINIUM Co.,Ltd. Address before: 528061, No. 23, Ho Man Road, Nanzhuang Town, Chancheng District, Guangdong, Foshan Patentee before: Guangdong Xingfa Group Corp.,Ltd. |
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Address after: 528137 F22, first floor, building 23, No. 23, qiangye Avenue, Leping Town, Sanshui District, Foshan City, Guangdong Province (residence declaration) Patentee after: GUANGDONG XINGFA ALUMINIUM Co.,Ltd. Address before: 528061, No. 23, Ho Man Road, Nanzhuang Town, Chancheng District, Guangdong, Foshan Patentee before: GUANGDONG XINGFA ALUMINIUM Co.,Ltd. |
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