CN108746469B - Cold and hot combined trimming process for aluminum alloy forging - Google Patents
Cold and hot combined trimming process for aluminum alloy forging Download PDFInfo
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- CN108746469B CN108746469B CN201810470700.5A CN201810470700A CN108746469B CN 108746469 B CN108746469 B CN 108746469B CN 201810470700 A CN201810470700 A CN 201810470700A CN 108746469 B CN108746469 B CN 108746469B
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- Prior art keywords
- trimming
- aluminum alloy
- cold
- hot
- forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
- B21K27/06—Cutting-off means; Arrangements thereof
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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 the technical field of aluminum alloy forging, in particular to a cold and hot combined trimming process for an aluminum alloy forging, which comprises the following steps of: hot trimming, solution treatment, cold trimming and artificial aging, wherein 3-6 mm of residual flash is reserved during hot trimming, and the flash is cut twice, so that the shear stress during cold cutting is reduced, and the microcracks during cold cutting are reduced; the solid solution treatment is carried out before cold cutting, the temperature of artificial aging is lower after cold cutting, and micro cracks generated by cold cutting cannot extend; the residual flash is reserved in the hot trimming, so that a gap is reserved between the aluminum alloy forging body and the flash notch, and the forging body scratch caused by accumulation of aluminum alloy materials on the cutting edge of the female die due to die sticking of aluminum alloy materials is effectively prevented; the hot trimming can reduce the influence of trimming microcracks caused under trimming shear stress on the forging; even if trimming cracks exist at the notch in the trimming process, the cracks can not extend to the forging body during solution treatment because residual flashes are reserved.
Description
Technical Field
The invention relates to the technical field of aluminum alloy forging, in particular to a cold and hot combined trimming process for an aluminum alloy forging.
Background
Aluminum alloy is a non-ferrous metal structural material which is most widely applied in industry, and the types of the aluminum alloy are more according to the alloy components, for example, forged aluminum alloy has excellent thermoplasticity, is suitable for forging, has lighter weight, and is more and more widely applied in various fields such as automobile parts and the like. However, the edge cutting process for aluminum alloy forging has the technical problems of deformation of a forging piece, body strain, extension of an edge cutting microcrack source after solution treatment and the like.
In the prior art, the trimming mode of the aluminum alloy forging is mainly two: 1. cold trimming, this side cut mode is adopted by domestic most aluminum alloy forging enterprises now, and process scheme is: heating an aluminum alloy bar, die forging, air cooling a forged piece to room temperature, cold trimming, solid solution, correcting and artificially aging; 2. the hot trimming process is generally adopted by aluminum alloy forging enterprises such as Germany, Japan and the like at present, and the process scheme is as follows: heating an aluminum alloy bar, die forging, trimming correction (in a hot state), solid solution and artificial aging. For cold trimming, trimming the aluminum alloy forging in a cold state, wherein micro cracks are easily formed at the positions of flash cuts of the forging due to large shearing stress in the trimming process, and the cracks further extend to the forging body in the subsequent heat treatment solution cooling process to cause cracking and scrapping of the aluminum alloy forging; for hot trimming, the aluminum alloy forging is trimmed in a hot state, and because the aluminum alloy material has high viscosity in the hot state, the aluminum alloy material is easy to form and accumulate on the trimming die cutting edge, so that the early failure of the die cutting edge is easy to cause, the service life of the die is influenced, the deformation of the forging is easy to generate, and meanwhile, the accumulated residual aluminum alloy material is easy to scratch the forging body and influence the surface quality of the forging.
Disclosure of Invention
The invention aims to provide a cold and hot combined trimming process for an aluminum alloy forging aiming at the defects of the prior art, which is beneficial to improving the quality of aluminum alloy forging and reducing the generation of forging cracks.
The technical scheme adopted by the invention for solving the technical problems is as follows: the cold and hot combined trimming process for the aluminum alloy forging comprises the steps of carrying out hot trimming on the forged aluminum alloy forging in a hot state, retaining 3-6 mm of residual flash during hot trimming, carrying out solid solution treatment, carrying out cold trimming in a cold state, cutting off redundant residual flash, and finally carrying out artificial aging.
Preferably, when cold trimming is performed, the trimming correction composite die is adopted to correct the forge piece while trimming.
Preferably, the width of the residual flash remained in the hot trimming is 4-5 mm.
The invention has the beneficial effects that: a cold and hot combined trimming process for an aluminum alloy forging comprises the following steps: the method comprises the following steps of hot trimming, solution treatment, cold trimming and artificial aging, wherein 3-6 mm of residual flash is reserved during hot trimming, and compared with the prior art, the flash is firstly cut twice, so that the shearing stress during cold cutting is reduced, and the microcracks during cold cutting are reduced; secondly, the solution treatment is carried out before the cold cutting, the temperature of the artificial aging is lower after the cold cutting, and the micro-crack generated by the cold cutting cannot extend; thirdly, the residual flash is reserved in the hot trimming, so that a gap is reserved between the aluminum alloy forging body and the flash notch, and the forging body scratch caused by accumulation of aluminum alloy materials on the cutting edge of the female die due to die sticking of the aluminum alloy materials is effectively prevented; fourthly, the hot trimming can reduce the influence of trimming microcracks caused by trimming shear stress on the forge piece; even if trimming cracks exist at the notch in the trimming process, the cracks can not extend to the forging body in the solution treatment process because residual flashes are reserved.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the scope of the present invention is not limited thereto.
The cold and hot combined trimming process for the aluminum alloy forging, namely, trimming the flash twice, specifically, trimming the forged aluminum alloy forging for the first time in a hot state, wherein the trimming for the first time is hot trimming, 3-6 mm of residual flash is reserved during hot trimming, the width of the flash is reduced through the hot trimming, so that the shearing stress during the second trimming is favorably reduced, and the residual flash is reserved, so that a gap is reserved between an aluminum alloy forging body and a flash cut, thereby effectively preventing the forging body from being scratched due to accumulation of die cutting edge materials, the influence of trimming microcracks caused by trimming shearing stress on the forging can be reduced by the hot trimming, even if trimming cracks exist at the cut in the trimming process, the residual flash is reserved, and the cracks can not extend to the forging body in the solid solution treatment process.
The method carries out the solution treatment before the cold trimming, and prevents the crack from extending due to higher fixed treatment temperature after the cold trimming.
And then carrying out secondary combined trimming in a cold state, namely cold trimming, cutting off redundant residual flashes, and finally carrying out artificial aging. The invention solves the technical problems of the existing aluminum alloy forging aspects such as the deformation of the forging, the body strain, the extension of the trimming microcrack source to the forging body and the like caused in the trimming process of the aluminum alloy forging through the combined trimming.
And when cold trimming is carried out, the trimming and correcting composite die is adopted to correct the forge piece.
Furthermore, the width of the residual flash remained during hot trimming is 4-5 mm.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (3)
1. The cold and hot combined trimming process for the aluminum alloy forging is characterized by comprising the following steps of: and (3) performing hot trimming on the forged aluminum alloy forging in a hot state, retaining 3-6 mm of residual flash during hot trimming, performing solid solution treatment, performing cold trimming in a cold state, cutting off redundant residual flash, and finally performing artificial aging.
2. The aluminum alloy forging cold and hot combined trimming process according to claim 1, characterized in that: and when cold trimming is carried out, the trimming and correcting composite die is adopted to correct the forge piece.
3. The aluminum alloy forging cold and hot combined trimming process according to claim 1, characterized in that: the width of the residual flash remained during hot trimming is 4-5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810470700.5A CN108746469B (en) | 2018-05-17 | 2018-05-17 | Cold and hot combined trimming process for aluminum alloy forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810470700.5A CN108746469B (en) | 2018-05-17 | 2018-05-17 | Cold and hot combined trimming process for aluminum alloy forging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108746469A CN108746469A (en) | 2018-11-06 |
| CN108746469B true CN108746469B (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810470700.5A Active CN108746469B (en) | 2018-05-17 | 2018-05-17 | Cold and hot combined trimming process for aluminum alloy forging |
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| CN (1) | CN108746469B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363259B (en) * | 2011-09-22 | 2013-01-23 | 哈尔滨哈飞工业有限责任公司 | Molding method for casting and forging structure piece of wheelchair frame |
| CN102773668B (en) * | 2012-07-21 | 2014-12-10 | 上海劭晟国际贸易有限公司 | Forging process for support of aero seat |
| CN104015007A (en) * | 2014-06-13 | 2014-09-03 | 浙江巨科实业有限公司 | Method for manufacturing aluminum alloy hub |
| CN105458135A (en) * | 2015-11-29 | 2016-04-06 | 郑臣钏 | Alloy piece forging technology |
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| CN108746469A (en) | 2018-11-06 |
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