CN112742938A - Hot stamping forming method for 5-series aluminum alloy for automobile - Google Patents
Hot stamping forming method for 5-series aluminum alloy for automobile Download PDFInfo
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- CN112742938A CN112742938A CN201911053584.8A CN201911053584A CN112742938A CN 112742938 A CN112742938 A CN 112742938A CN 201911053584 A CN201911053584 A CN 201911053584A CN 112742938 A CN112742938 A CN 112742938A
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- Prior art keywords
- aluminum alloy
- stamping
- series aluminum
- automobile
- cooling
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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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
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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
Abstract
The invention relates to a method for hot stamping and forming 5-series aluminum alloy for an automobile, which comprises the steps of heating treatment, cold die stamping and pressure maintaining cooling; heating the 5-series aluminum alloy plate to 320-480 ℃, preserving heat for 1-5min, then quickly transferring the plate to a cold die for stamping, carrying out pressure-maintaining cooling after stamping, and cooling the aluminum alloy part to room temperature by introducing cooling water into the die. According to the invention, the aluminum material is heated to the temperature above the recrystallization temperature, and the aluminum material is formed at high temperature while finishing recrystallization, so that the forming performance of the material can be obviously improved, the problem of cracking of the complex automobile part material is solved, the production cost is reduced, and the stamping production of the automobile aluminum alloy part with a complex structure can be realized.
Description
Technical Field
The invention relates to a hot stamping forming method of 5-series aluminum alloy for an automobile, belonging to the field of plastic forming processing of metal materials.
Background
The prior art 5 series aluminum alloy treatment mode is that the aluminum alloy is rolled to H18 state, then is subjected to box annealing or continuous annealing treatment to form O state, and then is subjected to cold stamping at room temperature, the room temperature stamping material has high yield strength, low elongation and poor formability, and cracking sites are easy to occur in the cold stamping forming process of producing automobile parts with complex shapes and structures.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method for hot stamping 5-series aluminum alloy for automobiles, which can effectively improve the formability of 5-series aluminum alloy materials and solve the problem of easy cracking during cold stamping of automobile parts.
The invention is realized by adopting the following scheme: a5 series aluminum alloy hot stamping forming method for an automobile comprises a heating treatment step, a cold die stamping step and a pressure maintaining cooling step; heating the 5-series aluminum alloy plate to 320-480 ℃, preserving heat for 1-5min, then quickly transferring the plate to a cold die for stamping, carrying out pressure-maintaining cooling after stamping, and cooling the aluminum alloy part to room temperature by introducing cooling water into the die.
Further, the heating rate of the 5-series aluminum alloy plate material heated to 320-480 ℃ is controlled to be 30-35 ℃/s.
Further, the time for transferring and completing the punching is controlled within 10 s.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the aluminum material is heated to the temperature above the recrystallization temperature, and the aluminum material is formed at high temperature while finishing recrystallization, so that the forming performance of the material can be obviously improved, the problem of cracking of the complex automobile part material is solved, the production cost is reduced, and the stamping production of the automobile aluminum alloy part with a complex structure can be realized.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail by specific embodiments.
Drawings
FIG. 1 is a schematic view of a vehicle part manufactured by the hot press forming method of the present invention.
Detailed Description
The first embodiment is as follows: a method for hot stamping 5 series aluminum alloy for an automobile, wherein the 5 series aluminum alloy is a 5 series cold rolling state aluminum alloy material; the method comprises the steps of heating treatment, cold die stamping and pressure maintaining cooling; heating the 5-series aluminum alloy plate to 460 ℃, preserving heat for 1min, then quickly transferring the plate to a cold die for stamping, carrying out pressure-maintaining cooling after stamping is finished, and cooling the aluminum alloy part to room temperature by introducing cooling water into the die; the invention relates to a processing method for improving the hot stamping formability of 5 series aluminum alloy for an automobile, in particular to a method for carrying out hot stamping processing on a cold-rolled sheet, which belongs to a special processing method for improving the formability of materials.
In the embodiment, the heating rate of heating the 5-series aluminum alloy plate to 470 ℃ is controlled at 34 ℃/s, and an air circulation furnace is adopted for heating, the heating rate is more than 30 ℃/s, the material performance is superior to that of the material produced by a box type annealing furnace in the current market, because the material produced by the box type annealing furnace has low heating rate, large and uneven grain size and poor formability; although the heating rate of the coil produced by the continuous annealing line process can reach more than 30 ℃/s, the production cost is high, and the hot stamping cannot be realized.
In this embodiment, the time for transferring and completing the press is controlled within 10 s.
Example two: a method for hot stamping 5 series aluminum alloy for an automobile, wherein the 5 series aluminum alloy is a 5 series cold rolling state aluminum alloy material; comprises a heating treatment step, a cold die stamping step and a pressure maintaining cooling step; heating the 5-series aluminum alloy plate to 400 ℃, preserving heat for 3min, then quickly transferring the plate to a cold die for stamping, carrying out pressure-maintaining cooling after stamping is finished, and cooling the aluminum alloy part to room temperature by introducing cooling water into the die; the invention relates to a processing method for improving the hot stamping formability of 5 series aluminum alloy for an automobile, in particular to a method for carrying out hot stamping processing on a cold-rolled sheet, which belongs to a special processing method for improving the formability of materials.
In the embodiment, the heating rate of heating the 5-series aluminum alloy plate to 470 ℃ is controlled at 33 ℃/s, and an air circulation furnace is adopted for heating, the heating rate is more than 30 ℃/s, the material performance is superior to that of the material produced by a box type annealing furnace in the current market, because the material produced by the box type annealing furnace has low heating rate, large and uneven grain size and poor formability; although the heating rate of the coil produced by the continuous annealing line process can reach more than 30 ℃/s, the production cost is high, and the hot stamping cannot be realized.
In this embodiment, the time for transferring and completing the press is controlled within 10 s.
Example three: a method for hot stamping 5 series aluminum alloy for an automobile, wherein the 5 series aluminum alloy is a 5 series cold rolling state aluminum alloy material; the method comprises the steps of heating treatment, cold die stamping and pressure maintaining cooling; heating the 5-series aluminum alloy plate to 350 ℃, preserving heat for 4min, then quickly transferring the plate to a cold die for stamping, carrying out pressure-maintaining cooling after stamping is finished, and cooling the aluminum alloy part to room temperature by introducing cooling water into the die; the invention relates to a processing method for improving the hot stamping formability of 5 series aluminum alloy for an automobile, in particular to a method for carrying out hot stamping processing on a cold-rolled sheet, which belongs to a special processing method for improving the formability of materials.
In the embodiment, the heating rate of heating the 5 series aluminum alloy plate to 350 ℃ is controlled at 31 ℃/s, and an air circulation furnace is adopted for heating, the heating rate is more than 30 ℃/s, the material performance is superior to that of the material produced by a box type annealing furnace in the current market, because the material produced by the box type annealing furnace has low heating rate, large and uneven grain size and poor formability; although the heating rate of the coil produced by the continuous annealing line process can reach more than 30 ℃/s, the production cost is high, and the hot stamping cannot be realized. .
In this embodiment, the time for transferring and completing the press is controlled within 10 s.
Fig. 1 is a schematic view of a vehicle part (shield) obtained by hot stamping the 5-series aluminum alloy for a vehicle according to the present invention, in which a steel plate is used for stamping at the early stage, and a 5182 alloy aluminum plate is used for cold stamping at the later stage in order to reduce the weight, but there is a problem of cracking, in which the elongation at break of the 5182 alloy material is only about 24% in the cold state, and the elongation at break of the 5182 alloy material is 50% or more in the hot state in the hot stamping process. The hot stamping forming method of the invention not only solves the cracking problem, but also reduces the weight by 50 percent.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the invention discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (3)
1. A method for hot stamping and forming 5 series aluminum alloy for automobiles is characterized in that: comprises a heating treatment step, a cold die stamping step and a pressure maintaining cooling step; heating the 5-series aluminum alloy plate to 320-480 ℃, preserving heat for 1-5min, then quickly transferring the plate to a cold die for stamping, carrying out pressure-maintaining cooling after stamping, and cooling the aluminum alloy part to room temperature by introducing cooling water into the die.
2. The method for hot press forming of a 5-series aluminum alloy for automobiles according to claim 1, wherein: the heating rate of the 5-series aluminum alloy plate is controlled to be 30-35 ℃/s when the temperature is increased to 320-480 ℃.
3. The method for hot press forming of a 5-series aluminum alloy for automobiles according to claim 1, wherein: the time for transferring and completing the punching is controlled within 10 s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911053584.8A CN112742938A (en) | 2019-10-31 | 2019-10-31 | Hot stamping forming method for 5-series aluminum alloy for automobile |
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| CN201911053584.8A CN112742938A (en) | 2019-10-31 | 2019-10-31 | Hot stamping forming method for 5-series aluminum alloy for automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113414267A (en) * | 2021-06-17 | 2021-09-21 | 上海交通大学 | Pre-rolling shaping method for work-hardening metal plate |
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| US20160340766A1 (en) * | 2014-01-24 | 2016-11-24 | Edward K. Steinebach | High Strength Aluminum Stamping |
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| CN108655668A (en) * | 2018-04-28 | 2018-10-16 | 武汉理工大学 | Aluminium alloy tailor welded blank forming processing technology |
| CN109385587A (en) * | 2017-08-03 | 2019-02-26 | 本特勒尔汽车技术有限公司 | Method for manufacturing the motor vehicle component made of 6000 series alloys |
| CN110252899A (en) * | 2019-07-25 | 2019-09-20 | 哈尔滨工业大学 | A kind of titanium alloy thin wall component quickly heats cold mould hot plate manufacturing process |
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2019
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160340766A1 (en) * | 2014-01-24 | 2016-11-24 | Edward K. Steinebach | High Strength Aluminum Stamping |
| CN105200283A (en) * | 2014-06-26 | 2015-12-30 | 张亚荟 | New process avoiding coarse 6063 extrusion aluminum alloy crystals |
| CN104959437A (en) * | 2015-07-10 | 2015-10-07 | 中南大学 | Forming method for improving forming performance of 6XXX series aluminum alloy plate |
| CN106676438A (en) * | 2016-12-16 | 2017-05-17 | 华中科技大学 | Method for improving thermal forming efficiency and forming property of aluminum alloy |
| CN109385587A (en) * | 2017-08-03 | 2019-02-26 | 本特勒尔汽车技术有限公司 | Method for manufacturing the motor vehicle component made of 6000 series alloys |
| CN108380722A (en) * | 2018-04-27 | 2018-08-10 | 武汉理工大学 | A kind of hot press-formed method of lightweight car body of aluminum alloy component |
| CN108655668A (en) * | 2018-04-28 | 2018-10-16 | 武汉理工大学 | Aluminium alloy tailor welded blank forming processing technology |
| CN110252899A (en) * | 2019-07-25 | 2019-09-20 | 哈尔滨工业大学 | A kind of titanium alloy thin wall component quickly heats cold mould hot plate manufacturing process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113414267A (en) * | 2021-06-17 | 2021-09-21 | 上海交通大学 | Pre-rolling shaping method for work-hardening metal plate |
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