CN114260403B - Forging method for basin-shaped aluminum alloy die forging piece with uniformity in performance direction - Google Patents
Forging method for basin-shaped aluminum alloy die forging piece with uniformity in performance direction Download PDFInfo
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- CN114260403B CN114260403B CN202111572855.8A CN202111572855A CN114260403B CN 114260403 B CN114260403 B CN 114260403B CN 202111572855 A CN202111572855 A CN 202111572855A CN 114260403 B CN114260403 B CN 114260403B
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- 238000005242 forging Methods 0.000 title claims abstract description 104
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000013461 design Methods 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims abstract description 13
- 238000004364 calculation method Methods 0.000 claims abstract description 5
- 238000005482 strain hardening Methods 0.000 claims abstract description 5
- 230000008520 organization Effects 0.000 claims abstract description 4
- 238000004088 simulation Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 5
- 239000013585 weight reducing agent Substances 0.000 abstract description 4
- 238000000265 homogenisation Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
The invention relates to the technical field of material forming and control, and provides a forging method for the uniformity of the performance direction of a basin-shaped aluminum alloy die forging, wherein the basin-shaped aluminum alloy die forging is made of 7050 aluminum alloy; the method comprises the following steps: s1, designing a design drawing of a straight rough blank with the same cross-sectional shape as a basin-shaped aluminum alloy die forging through simulation back calculation of bending deformation; s2, cold working the bar blank with uniform organization performance in all directions into a flat blank according to the design drawing of the flat blank in the step S1; and S3, die forging the flat rough blank in a bending forming mode at the die forging temperature of 350-400 ℃ and the deformation of 0-10%, so as to obtain the basin-shaped aluminum alloy die forging. The invention realizes the control of the homogenization of the performance direction of the basin-shaped aluminum alloy die forging, solves the problem of large difference of the performance direction in the existing die forging forming process, further expands the application range and the field of the aluminum alloy die forging, and makes more models and equipment possible to adopt aluminum alloy for weight reduction design.
Description
Technical Field
The invention relates to the technical field of material forming and control, in particular to a forging method for basin-shaped aluminum alloy die forgings with uniformity in performance direction.
Background
Along with the improvement of the preparation process of the aviation aluminum alloy forging, the application range of the aviation aluminum alloy forging is also enlarged, so that the application possibility and the application method of the high-performance aluminum alloy are explored in multiple fields. In order to achieve the purpose of weight reduction in certain fields, it is proposed that aluminum alloy forgings can be adopted under specific conditions, for example, in certain fields, high-performance aluminum alloys with uniform isotropic properties are adopted to replace titanium alloys and high-strength steel forgings.
The structure of a basin-shaped aluminum alloy die forging is shown in FIG. 1; the forging with the structure is formed by extruding the rough blank by using a die, so that the metal of the rough blank flows according to the shape of a die cavity, and finally the whole die cavity is filled, thereby achieving the purpose of forging forming. However, the forging formed by the method has the problem of large performance difference in all directions, and can be only used in environments with directivity in stress in working; therefore, the existing aluminum alloy forging process cannot meet the requirement of uniform structure performance of the aluminum alloy die forging in all directions.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the forging method for the performance direction uniformity of the basin-shaped aluminum alloy die forging is provided, and the performance direction uniformity of the basin-shaped aluminum alloy die forging is controlled.
The technical scheme adopted for solving the technical problems is as follows: the forging method of the basin-shaped aluminum alloy die forging piece with the uniformity in the performance direction comprises the following steps that the basin-shaped aluminum alloy die forging piece is made of 7050 aluminum alloy; the method comprises the following steps:
s1, designing a design drawing of a straight rough blank with the same cross-sectional shape as a basin-shaped aluminum alloy die forging through simulation back calculation of bending deformation;
s2, cold working the bar blank with uniform organization performance in all directions into a flat blank according to the design drawing of the flat blank in the step S1;
and S3, die forging the flat rough blank in a bending forming mode at the die forging temperature of 350-400 ℃ and the deformation of 0-10%, so as to obtain the basin-shaped aluminum alloy die forging.
Further, in step S1, the method further comprises forging the round ingot into a bar billet having uniform structure properties in all directions.
In step S1, the round steel ingot is forged into a bar blank with uniform structure performance in all directions by repeated reversing upsetting.
The beneficial effects of the invention are as follows: the forging method for the uniformity of the performance direction of the basin-shaped aluminum alloy die forging provided by the embodiment of the invention realizes the control of the uniformity of the performance direction of the basin-shaped aluminum alloy die forging, solves the problem of large difference of the performance direction in the existing die forging forming process, further expands the application range and the field of the aluminum alloy die forging, and enables more models and equipment to adopt aluminum alloy for weight reduction design.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below; it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic structural view of a basin-shaped aluminum alloy die forging;
FIG. 2 is a schematic view of a straight blank design;
FIG. 3 is a schematic view of a flat blank;
fig. 4 is a schematic diagram of a structure for die-forming a straight blank.
The reference numerals in the drawings are: 101-basin-shaped aluminum alloy die forgings and 102-flat rough blanks.
Detailed Description
In order that the present invention may be better understood by those skilled in the art, it is further described below with reference to the accompanying drawings and examples. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. Embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Whether the forging is an aluminum alloy forging or other forgings, the traditional die forging forming is to extrude the rough blank by using a grinding tool, so that the metal of the rough blank flows according to the shape of a die cavity, and finally the whole die cavity is filled, thereby achieving the purpose of forging forming. However, in the forming process, the metal material can be dynamically recrystallized, so that the internal tissue structure of the metal is changed, and the effect of changing the performance of the forging piece is achieved in the forming process. That is, conventional swaging is to achieve both regulation and control of tissue properties during the forming process. Since the flow of metal in the die cavity is regular during die forging, the forging performance tends to have directionality which varies in strength depending on the material characteristics. The performance direction characteristics of the aluminum alloy material are very strong, so that the control of the performance direction uniformity of the aluminum alloy die forging piece is difficult to realize by the traditional die forging method.
In order to solve the problems, the invention improves the existing die forging mode, provides a forging method for the uniformity of the performance direction of the basin-shaped aluminum alloy die forging, and realizes the control of the uniformity of the performance direction of the basin-shaped aluminum alloy die forging through the process thought of shape and sex step-by-step control.
According to the forging method for the basin-shaped aluminum alloy die forging provided by the embodiment of the invention, the basin-shaped aluminum alloy die forging 101 is made of 7050 aluminum alloy; the method comprises the following steps:
s1, designing a design drawing of a straight rough blank 102 with the same cross-sectional shape as a basin-shaped aluminum alloy die forging 101 through simulation back calculation of bending deformation;
s2, cold working the bar blank with uniform organization property in all directions into a flat blank 102 according to the design diagram of the flat blank 102 in the step S1;
and S3, die forging and forming the flat blank 102 in a bending and forming mode at the die forging temperature of 350-400 ℃ and the deformation of 0-10%, so as to obtain the basin-shaped aluminum alloy die forging 101.
Referring to fig. 1, the basin-shaped aluminum alloy die forging 101 is of a basin-shaped structure with an opening at the upper end, and a center through hole is formed in the center of the bottom of the forging.
In step S1, referring to fig. 2, according to the structure of the basin-shaped aluminum alloy die forging piece 101, the basin-shaped aluminum alloy die forging piece 101 is bent under the condition of a uniform cross-section shape, after bending, the inner surface of the basin-shaped aluminum alloy die forging piece 101 forms the upper surface of the flat blank 102, and the outer surface of the basin-shaped aluminum alloy die forging piece 101 forms the lower surface of the flat blank 102. By simulating back calculation through bending deformation, a design drawing of a straight rough blank 102 with the same cross-sectional shape as the basin-shaped aluminum alloy die forging 101 is designed, and a foundation is laid for subsequent processing. In order to improve the utilization of the material, it is preferable that the maximum height L between the upper and lower surfaces of the flat blank 102 be as small as possible.
In step S2, according to the design drawing of the flat blank 102, the bar blank with uniform structure performance in all directions is subjected to cold working methods such as sawing and machining to obtain the flat blank 102 required for design, as shown in fig. 3. Since this step is not subjected to any thermal processing, the internal structure and properties of the blank within the flat blank 102 are not changed.
In step S3, referring to fig. 4, the structure of the mold is not shown for the sake of simplifying the drawing. Under the conditions that the die forging temperature is 350-400 ℃ and the deformation is 0-10%, the cross section of the straight rough blank 102 is opposite to the cross section of the basin-shaped aluminum alloy die forging 101, so that the straight rough blank 102 is only required to be bent in the cavity of the die, the straight rough blank 102 is formed into the basin-shaped aluminum alloy die forging 101 under the condition of small deformation, the performance of the forging is prevented from being changed in the forming process, and the uniform control of the performance and the shape control of the forging are finally separated, so that the uniform structure and the performance of the straight rough blank 102 are reserved to the forging.
In step S2, the rod blanks having uniform structure properties in all directions may be purchased directly on the market, and of course, the rod blanks having uniform structure properties in all directions may be obtained by forging ingots. Preferably, in step S1, the method further comprises forging the round ingot into a bar blank with uniform structure performance in all directions by means of repeated reversing upsetting. The inventor obtains through experiments that the round steel ingot can obtain a bar blank with uniform tissue performance in all directions through repeated reversing upsetting; and even if the forging and drawing times of square steel ingots are improved to nine forging and nine drawing, the directionality of the tissue performance is difficult to eliminate.
According to the forging method for the uniformity of the performance direction of the basin-shaped aluminum alloy die forging, the flat rough blank 102 with uniform tissue performance in all directions is prepared, and the flat rough blank is subjected to die forging forming in a bending forming mode by controlling the die forging temperature and the deformation, so that the purposes of controlling the shape and the performance step by step are achieved, the uniformity of the performance direction of the basin-shaped aluminum alloy die forging is controlled, the problem of large difference of the performance direction in the conventional die forging forming process is solved, the application range and the field of the aluminum alloy die forging are further expanded, and more models and equipment are enabled to be possible to adopt aluminum alloy for carrying out weight reduction design.
The performance of the basin-shaped aluminum alloy die forging 101 obtained after the flat blank 102 is die-formed by adopting a bending forming mode under the conditions of different die-forming temperatures and deformation amounts is analyzed as follows:
from the above table, the material is 7050 aluminum alloy, and after the straight blank 102 is formed by bending and forming at the die forging temperature of 350-400 ℃ and the deformation of 0-10%, the uniform structure performance of the blank can be maintained to the forging, so that the uniform control of the performance and the shape control of the forging are separated.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The forging method of the basin-shaped aluminum alloy die forging piece with uniformity in performance direction comprises the following steps that the basin-shaped aluminum alloy die forging piece (101) is made of 7050 aluminum alloy; the method is characterized by comprising the following steps of:
s1, designing a design drawing of a straight blank (102) with the same cross-section shape as a basin-shaped aluminum alloy die forging (101) through simulation back calculation of bending deformation;
s2, cold working the bar blank with uniform organization performance in all directions into a flat blank (102) according to the design diagram of the flat blank (102) in the step S1;
and S3, performing die forging forming on the flat blank (102) in a bending forming mode under the conditions that the die forging temperature is 350-400 ℃ and the deformation is 0-10%, so as to obtain the basin-shaped aluminum alloy die forging (101).
2. The method for forging a pot-shaped aluminum alloy die forging piece according to claim 1, wherein in step S1, a round ingot is forged into a bar blank having uniform structure properties in all directions.
3. The forging method of the basin-shaped aluminum alloy die forging piece according to claim 2, wherein in the step S1, the round steel ingot is forged into a bar blank with uniform structure performance in all directions by means of repeated reversing upsetting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111572855.8A CN114260403B (en) | 2021-12-21 | 2021-12-21 | Forging method for basin-shaped aluminum alloy die forging piece with uniformity in performance direction |
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| CN202111572855.8A CN114260403B (en) | 2021-12-21 | 2021-12-21 | Forging method for basin-shaped aluminum alloy die forging piece with uniformity in performance direction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20070023381A (en) * | 2005-08-24 | 2007-02-28 | 가부시키가이샤 고베 세이코쇼 | Method for molding aluminum alloy material |
| RU2405856C1 (en) * | 2009-08-31 | 2010-12-10 | Федеральное Государственное Унитарное Предприятие "Государственный Рязанский Приборный Завод" | Method for manufacturing thin-wall parts from aluminium wrought alloys |
| CN104707931A (en) * | 2015-03-06 | 2015-06-17 | 西安三角航空科技有限责任公司 | Manufacturing method for large high-temperature alloy disk-type die forging parts |
| CN106424498A (en) * | 2016-09-30 | 2017-02-22 | 中国南方航空工业(集团)有限公司 | Forming method of arc-shaped forge piece and die applied to forming method |
| CN108672646A (en) * | 2018-03-27 | 2018-10-19 | 四川省泰禾机械有限公司 | A kind of iron seat contour forging technique |
| CN110640060A (en) * | 2019-04-30 | 2020-01-03 | 武汉理工大学 | Near-net composite forming process method for large complex basin-shaped ring piece |
| CN111054867A (en) * | 2020-01-06 | 2020-04-24 | 西安三角防务股份有限公司 | Forging method of oversized U-shaped titanium alloy integral forging |
| CN112059084A (en) * | 2020-08-06 | 2020-12-11 | 沈阳中钛装备制造有限公司 | Method for forming Y-shaped cylindrical titanium alloy revolving body |
| CN112338123A (en) * | 2020-09-15 | 2021-02-09 | 沈阳中钛装备制造有限公司 | Die for forging balance elbow and method for forging balance elbow |
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2021
- 2021-12-21 CN CN202111572855.8A patent/CN114260403B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070023381A (en) * | 2005-08-24 | 2007-02-28 | 가부시키가이샤 고베 세이코쇼 | Method for molding aluminum alloy material |
| RU2405856C1 (en) * | 2009-08-31 | 2010-12-10 | Федеральное Государственное Унитарное Предприятие "Государственный Рязанский Приборный Завод" | Method for manufacturing thin-wall parts from aluminium wrought alloys |
| CN104707931A (en) * | 2015-03-06 | 2015-06-17 | 西安三角航空科技有限责任公司 | Manufacturing method for large high-temperature alloy disk-type die forging parts |
| CN106424498A (en) * | 2016-09-30 | 2017-02-22 | 中国南方航空工业(集团)有限公司 | Forming method of arc-shaped forge piece and die applied to forming method |
| CN108672646A (en) * | 2018-03-27 | 2018-10-19 | 四川省泰禾机械有限公司 | A kind of iron seat contour forging technique |
| CN110640060A (en) * | 2019-04-30 | 2020-01-03 | 武汉理工大学 | Near-net composite forming process method for large complex basin-shaped ring piece |
| CN111054867A (en) * | 2020-01-06 | 2020-04-24 | 西安三角防务股份有限公司 | Forging method of oversized U-shaped titanium alloy integral forging |
| CN112059084A (en) * | 2020-08-06 | 2020-12-11 | 沈阳中钛装备制造有限公司 | Method for forming Y-shaped cylindrical titanium alloy revolving body |
| CN112338123A (en) * | 2020-09-15 | 2021-02-09 | 沈阳中钛装备制造有限公司 | Die for forging balance elbow and method for forging balance elbow |
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