CN114309108A - Extrusion forming method of oversized aluminum alloy integral wallboard for ships - Google Patents
Extrusion forming method of oversized aluminum alloy integral wallboard for ships Download PDFInfo
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- CN114309108A CN114309108A CN202111503948.5A CN202111503948A CN114309108A CN 114309108 A CN114309108 A CN 114309108A CN 202111503948 A CN202111503948 A CN 202111503948A CN 114309108 A CN114309108 A CN 114309108A
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- 238000001125 extrusion Methods 0.000 title claims abstract description 68
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000005260 corrosion Methods 0.000 claims abstract description 10
- 230000007797 corrosion Effects 0.000 claims abstract description 10
- 238000004088 simulation Methods 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000012797 qualification Methods 0.000 claims description 3
- 238000004901 spalling Methods 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000001192 hot extrusion Methods 0.000 abstract description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Abstract
An extrusion forming method of an aluminum alloy integral wallboard with an ultra-large specification for a ship relates to the technical field of hot extrusion manufacturing, solves the problem that the aluminum alloy integral wallboard with the ultra-large specification cannot be smoothly produced, and comprises the following steps: the taper extrusion needle extrudes a circular tube with a preset diameter in a follow-up extrusion mode; optimizing the design of the die by adopting finite element simulation; compiling a proper extrusion process, extruding at a low temperature and a high speed, and controlling the outlet temperature of a product; the extrusion production of the aluminum alloy integral wallboard with the oversized specification is realized, the prepared aluminum alloy integral wallboard for the ship has good formability, higher strength, better corrosion resistance and fatigue resistance, the current situation that the aluminum alloy integral wallboard for the ship cannot be produced in China is broken, and the aluminum alloy integral wallboard has good market prospect.
Description
Technical Field
The invention relates to the technical field of hot extrusion manufacturing, in particular to an extrusion forming method of an ultra-large aluminum alloy integral wallboard for ships.
Background
The ultra-large specification aluminum alloy integral wallboard comprises: this kind of product utilizes current large-scale extruder forward double acting function, adopts follow-up extrusion mode, through the precision design mould scheme, and accurate formulation extrusion process can realize the whole wallboard extrusion of super large specification aluminum alloy, satisfies the product size and each item experimental index of customer's demand, does not need extra equipment to drop into, has broken the situation that domestic unable production naval vessel used the whole wallboard of aluminum alloy.
For 1561 alloy and 5083 alloy with the wall thickness of 3-7mm and an oversized integral wallboard product with the size of 1700mm after being unfolded, the product cannot be produced by an online hot extrusion mode at home for a while due to the reasons of thin wall thickness, wide unfolded section size, high extrusion pressure and the like. In addition, during online extrusion, the production cannot be smoothly performed due to the fact that overpressure is used for stopping, the wall thickness of an extruded product cannot be guaranteed, the flow rate of the product is difficult to control, and severe waves appear on the surface and the outer vertical ribs.
The demands for large ships and warships are increasing at home and abroad, and the requirements for light weight, corrosion resistance, fatigue resistance, high strength and the like are continuously improved, so that the demand for the wallboard is increasing day by day, and how to produce the product in a quick, effective, simple and convenient manner is an important subject in the aluminum alloy extrusion industry and is also a technical problem to be solved by the invention.
Disclosure of Invention
The extrusion forming method of the aluminum alloy integral wallboard with the super-large specification for the ship has the advantages that the extrusion forming of the aluminum alloy integral wallboard with the unfolded width of 1700mm and the wall thickness of 3-7mm can be realized, the prepared aluminum alloy integral wallboard for the ship has good formability, high strength, good corrosion resistance and fatigue resistance, the control level of technical indexes of dimensional accuracy and concentricity is high, the quality is stable, the comprehensive performance is good, the industrial batch production can be favorably carried out, and the market application prospect is good.
The invention provides an extrusion forming method of an oversized aluminum alloy integral wallboard for ships, which comprises the following steps:
1) designing a taper extrusion needle, adding an online heating structure on the taper extrusion needle, designing according to the upper limit capacity of an extruder, and extruding a circular tube with a preset diameter by the taper extrusion needle in a follow-up extrusion mode;
2) optimizing the design of the die by adopting finite element simulation, manufacturing the die meeting the requirements, and determining the optimal die structure and the optimal operating band structure by finite element analysis;
3) compiling an extrusion process, extruding at a low temperature and a high speed, controlling the outlet temperature of a product, improving the extrusion speed, stabilizing the product quality and improving the qualification rate;
4) and 3) performing online extrusion according to the extrusion process compiled in the step 3), adjusting extrusion parameters, and realizing rapid extrusion of the product on the premise of ensuring that the product performance, the intergranular corrosion performance and the spalling corrosion performance are qualified.
Further, the diameter of the preset circular tube is set to be 540mm in the follow-up extrusion in the step 1).
Further, the size of the aluminum alloy integral wall plate capable of being extruded in the step 1) in a follow-up mode is as follows: the wall thickness is set to 3mm-7mm and the width is set to 1700 mm.
Further, the mould in the step 2) is designed in a gradient mode, so that the pressure is reduced, and the tail end of the long material is conveniently separated from the mould.
Further, the ingot casting temperature in the step 3) is 470-490 ℃.
Further, the extrusion speed in the step 3) is 0.3mm/s-0.6 mm/s.
Further, the temperature of the taper extrusion needle in the step 3) is 430 ℃.
Furthermore, a longitudinal guide path is added at the front beam outlet of the extruder, so that the product can be extruded conveniently.
The invention has the beneficial effects that: the extrusion production of the aluminum alloy integral wallboard with the oversized specification is realized, the prepared aluminum alloy integral wallboard for the ship has good formability, higher strength, better corrosion resistance and fatigue resistance, the current situation that the aluminum alloy integral wallboard for the ship cannot be produced in China is broken, and the aluminum alloy integral wallboard has good market prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a dimensional structure of an aluminum alloy integral panel according to an embodiment.
FIG. 2 is a schematic view of another dimensional structure of the aluminum alloy integral panel of the embodiment.
FIG. 3 is a schematic diagram of a finite element analysis structure of a mold band.
Fig. 4 is a schematic view of the assembly structure of the die work belt.
Fig. 5 is a schematic view of a longitudinal guide path structure of an outlet of a front beam of an extruder.
In the figure, 1-guide ring, 2-fixing structure.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
An extrusion forming method of an ultra-large aluminum alloy integral wallboard for ships, as shown in attached figures 1 and 2, is used for manufacturing the aluminum alloy integral wallboard with the wall thickness of 3.3mm, the wall thickness of 6.25mm and the width of 1700mm, and comprises the following steps:
1) designing a taper extrusion needle, adding an online heating structure on the taper extrusion needle, and extruding a round pipe with the diameter of 540mm by the taper extrusion needle in a follow-up extrusion mode;
2) as shown in the attached drawings 3 and 4, the finite element simulation optimization die design is adopted to manufacture a die meeting the requirements, the optimal die structure and the optimal operating band structure are determined through finite element analysis, and the slope design is carried out on the die, so that the pressure is reduced, and the tail end of the long material is conveniently separated from the die;
3) compiling an extrusion process, wherein the ingot casting temperature is 480 ℃, the extrusion speed is 0.5mm/s, the temperature of a taper extrusion needle is 430 ℃, as shown in figure 5, a longitudinal guide path is added at the front beam outlet of an extruder, the longitudinal guide path comprises a semicircular guide ring 1 and a fixed structure 2, the product extrusion is facilitated, the low-temperature high-speed extrusion is realized, the product outlet temperature is controlled, the extrusion speed is increased, the product quality is stable, and the qualification rate is increased;
4) according to the extrusion process compiled in the step 3), online extrusion is carried out, extrusion parameters are adjusted, and on the premise that the product performance, the intercrystalline corrosion performance and the exfoliation corrosion performance are qualified, the product is rapidly extruded, and the product surface is free of waves and the wall thickness is qualified.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention.
Claims (9)
1. An extrusion forming method of an ultra-large aluminum alloy integral wallboard for ships is characterized by comprising the following steps:
1) designing a taper extrusion needle, adding an online heating structure on the taper extrusion needle, designing according to the upper limit capacity of an extruder, and extruding a circular tube with a preset diameter by the taper extrusion needle in a follow-up extrusion mode;
2) optimizing the design of the die by adopting finite element simulation, manufacturing the die meeting the requirements, and determining the optimal die structure and the optimal operating band structure by finite element analysis;
3) compiling an extrusion process, extruding at a low temperature and a high speed, controlling the outlet temperature of a product, improving the extrusion speed, stabilizing the product quality and improving the qualification rate;
4) and 3) performing online extrusion according to the extrusion process compiled in the step 3), adjusting extrusion parameters, and realizing rapid extrusion of the product on the premise of ensuring that the product performance, the intergranular corrosion performance and the spalling corrosion performance are qualified.
2. The extrusion molding method of the ultra-large aluminum alloy integral wall plate for the ships according to claim 1, wherein the diameter of the preset circular tube in the step 1) is set to be 540mm in follow-up extrusion.
3. The extrusion forming method of the oversized-specification aluminum alloy integral wallboard for ships according to claim 1, wherein the aluminum alloy integral wallboard capable of being extruded in the step 1) in a follow-up mode is characterized in that: the wall thickness is set to 3mm-7mm and the width is set to 1700 mm.
4. The extrusion molding method of the ultra-large aluminum alloy integral wall plate for the ships according to claim 1, wherein the step 2) is performed with gradient design.
5. The extrusion molding method of the ultra-large-specification aluminum alloy integral wall plate for the ship according to claim 1, wherein the ingot casting temperature in the step 3) is 470-490 ℃.
6. The extrusion molding method of the aluminum alloy integral panel with extra large specification for ships according to claim 1, wherein the extrusion speed in the step 3) is 0.3mm/s-0.6 mm/s.
7. The extrusion molding method of the aluminum alloy monolithic wallboard with extra large specification for ships and warships as claimed in claim 1, wherein the temperature of the taper extrusion needle in the step 3) is 430 ℃.
8. The extrusion molding method of the oversized aluminum alloy integral wall plate for the ship as claimed in claim 1, wherein a longitudinal guide way is added at an outlet of a front beam of the extruder.
9. The extrusion molding method of the ultra-large aluminum alloy integral panel for the ships according to any one of claims 1 to 8, wherein the extrusion molding method of the ultra-large aluminum alloy integral panel is used for production of the panels for the ships.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111503948.5A CN114309108A (en) | 2021-12-09 | 2021-12-09 | Extrusion forming method of oversized aluminum alloy integral wallboard for ships |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111503948.5A CN114309108A (en) | 2021-12-09 | 2021-12-09 | Extrusion forming method of oversized aluminum alloy integral wallboard for ships |
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| CN114309108A true CN114309108A (en) | 2022-04-12 |
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| CN202111503948.5A Pending CN114309108A (en) | 2021-12-09 | 2021-12-09 | Extrusion forming method of oversized aluminum alloy integral wallboard for ships |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012141448A2 (en) * | 2011-04-15 | 2012-10-18 | 주식회사 동양강철 | Production method for a t-shaped reinforcing material for an lng storage tank, the reinforcing material, and an lng storage tank module using same |
| CN107164666A (en) * | 2017-05-31 | 2017-09-15 | 辽宁忠旺集团有限公司 | 5083 the ships energetic plate of aluminium alloy and its extrusion process |
| CN107282668A (en) * | 2017-07-11 | 2017-10-24 | 辽宁忠旺集团有限公司 | A kind of big wide cut LF6 aluminum alloy strips gusset extruding production technology |
| CN107739928A (en) * | 2017-10-30 | 2018-02-27 | 辽宁忠旺集团有限公司 | A kind of processing technology of 5083 aluminium alloy extrusions peculiar to vessel |
| CN111299347A (en) * | 2019-12-19 | 2020-06-19 | 中国航空制造技术研究院 | Extrusion forming method of wide ribbed thin-wall plate |
| CN112547831A (en) * | 2020-11-24 | 2021-03-26 | 东北大学 | Large-width aluminum alloy ribbed plate, production method thereof and extrusion perforating needle |
-
2021
- 2021-12-09 CN CN202111503948.5A patent/CN114309108A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012141448A2 (en) * | 2011-04-15 | 2012-10-18 | 주식회사 동양강철 | Production method for a t-shaped reinforcing material for an lng storage tank, the reinforcing material, and an lng storage tank module using same |
| CN107164666A (en) * | 2017-05-31 | 2017-09-15 | 辽宁忠旺集团有限公司 | 5083 the ships energetic plate of aluminium alloy and its extrusion process |
| CN107282668A (en) * | 2017-07-11 | 2017-10-24 | 辽宁忠旺集团有限公司 | A kind of big wide cut LF6 aluminum alloy strips gusset extruding production technology |
| CN107739928A (en) * | 2017-10-30 | 2018-02-27 | 辽宁忠旺集团有限公司 | A kind of processing technology of 5083 aluminium alloy extrusions peculiar to vessel |
| CN111299347A (en) * | 2019-12-19 | 2020-06-19 | 中国航空制造技术研究院 | Extrusion forming method of wide ribbed thin-wall plate |
| CN112547831A (en) * | 2020-11-24 | 2021-03-26 | 东北大学 | Large-width aluminum alloy ribbed plate, production method thereof and extrusion perforating needle |
Non-Patent Citations (2)
| Title |
|---|
| 刘静安: "铝合金整体壁板的生产工艺探讨", 铝加工, no. 04, pages 10 - 16 * |
| 胡龙飞等;: "基于响应面模型的铝合金壁板挤压成形优化设计", 中国机械工程, vol. 19, no. 13, pages 1630 - 1633 * |
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