CN114011962A - Forming method and device for deformed aluminum alloy closed three-dimensional sheet metal part - Google Patents
Forming method and device for deformed aluminum alloy closed three-dimensional sheet metal part Download PDFInfo
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- CN114011962A CN114011962A CN202111260741.XA CN202111260741A CN114011962A CN 114011962 A CN114011962 A CN 114011962A CN 202111260741 A CN202111260741 A CN 202111260741A CN 114011962 A CN114011962 A CN 114011962A
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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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, 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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Thermal Sciences (AREA)
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides a forming method and a device for a deformed aluminum alloy closed three-dimensional sheet metal part, wherein the method comprises the following steps: the method comprises the following steps: acquiring corner radius and the bending height of all corner areas of a part to be molded; step two: according to the corner radius and the flanging height of all corner areas of the part to be molded, acquiring the molding difficulty coefficient of each corner area; step three: performing each corner area of the part to be molded according to the sequence of the difficulty coefficients of each corner area from high to low; step four: carrying out solution treatment on the preformed part; step five: flattening bulging and loosening of the bottom surface of the preformed part after the solution treatment; step six: and (3) forming all the bent edges of the part to be formed except the corner areas until the bent edges are completely attached to the die, and aging to obtain the formed closed three-dimensional sheet metal part. The deformation of the solution treatment is reduced, the bulge and the looseness of the bottom surface of the part are effectively eliminated, and the qualified part meeting the technical requirements is produced.
Description
Technical Field
The invention belongs to the technical field of aviation, and relates to a method and a device for forming a deformed aluminum alloy closed three-dimensional sheet metal part.
Background
The solution treatment is a common material strengthening method in the field of aircraft manufacturing, and after the solution treatment, the bottom surface of a large-bottom surface closed forming part can generate the bulge and the looseness which cannot be eliminated. Particularly, the case-type parts are seriously bulged and loosened.
The traditional forming method is to quench and finish the whole formed bent edge, and has the defects that the bulge and the looseness of the large bottom surface generated by the forming method cannot be eliminated, and the gap between the parts and the tire is too large. Therefore, a method for forming a box-shaped part to eliminate the bulge and looseness of the large bottom surface is required to be researched.
Disclosure of Invention
The purpose of the invention is as follows:
the invention provides a forming method and a forming device for a deformed aluminum alloy closed three-dimensional sheet metal part, which solve the problems that a large bottom surface bulges and looseness cannot be eliminated and a part tire sticking gap is too large in the existing forming method.
The technical scheme is as follows:
the invention provides a forming method of a deformed aluminum alloy closed three-dimensional sheet metal part, which comprises the following steps:
the method comprises the following steps: acquiring corner radius and the bending height of all corner areas of a part to be molded;
step two: according to the corner radius and the flanging height of all corner areas of the part to be molded, acquiring the molding difficulty coefficient of each corner area;
step three: performing each corner area of the part to be molded according to the sequence of the difficulty coefficients of each corner area from high to low;
step four: carrying out solution treatment on the preformed part;
step five: flattening bulging and loosening of the bottom surface of the preformed part after the solution treatment;
step six: and (3) forming all the bent edges of the part to be formed except the corner areas until the bent edges are completely attached to the die, and aging to obtain the formed closed three-dimensional sheet metal part.
Optionally, solution treating the preformed part, comprising:
and (3) vertically putting the preformed part into water for solution treatment.
Optionally, solution treating the preformed part, comprising:
and rolling the preformed part into a barrel shape for solution treatment.
Optionally, the forming difficulty coefficient of each corner area is obtained according to the corner radius and the bead height of all the corner areas of the part to be formed, and the method includes:
and dividing the bending height of the corner area by the corner radius to obtain the molding difficulty coefficient of the corner area.
Optionally, the flattening the bulge and the looseness of the bottom surface of the preformed part after the solution treatment includes:
flattening the bottom surface of the solution treated preformed part is completed between the end of the new quenched state of the preformed part.
Optionally, the closed three-dimensional sheet metal part is a box-shaped three-dimensional sheet metal part.
Optionally, the corner region is a region which cannot be molded after solid solution, does not affect the discharge of bottom stress after molding, and increases rigidity and three-dimensional property.
The invention also provides a forming device of the deformed aluminum alloy closed three-dimensional sheet metal part, which comprises the following components:
the data processing subsystem is used for acquiring the corner radius and the flanging height of all the corner areas of the part to be molded and acquiring the molding difficulty coefficient of each corner area according to the corner radius and the flanging height of all the corner areas of the part to be molded;
the preforming subsystem is used for preforming the corner areas of the part to be formed according to the sequence of the difficulty coefficients of the corner areas from high to low;
the solution treatment subsystem is used for carrying out solution treatment on the preformed part;
the flattening treatment subsystem is used for flattening bulges and looseness on the bottom surface of the preformed part after the solution treatment;
and the forming subsystem is used for forming all the bent edges of the part to be formed except the corner areas until the bent edges are completely attached to the die, and obtaining the formed closed three-dimensional sheet metal part after aging.
Has the advantages that:
according to the forming method and device for the deformed aluminum alloy closed three-dimensional sheet metal part, the step-by-step forming method is adopted by calculating the forming difficulty coefficient of each area of the part, so that the phenomena of bulging, loosening and wrinkling at the bottom of the box-shaped part during heat treatment are greatly reduced, and the problems of residual bulging and loosening at the bottom of the box-shaped part can be thoroughly solved. The method provides an effective reference mode for solving the problem of heat treatment stress relief. Saves a great deal of manpower, reduces 50 to 80 percent of heat treatment deformation, and shortens the time for trimming parts from two hours to twenty to thirty minutes. The surface quality of the part is greatly improved, the tire sticking gap is reduced, the hammer print on the surface of the part is obviously reduced, and the tire sticking gap is reduced from 5mm at the measurable maximum to 0.3mm at the measurable maximum.
Drawings
FIG. 1 is a schematic view of the present invention illustrating the zoning of a part;
FIG. 2 is a schematic representation of the preformed shape of the part of the present invention;
description of reference numerals:
1-a first part corner, 2-a second part corner, 3-a third part corner, 4-a fourth part corner;
5-a first flat area, 6-a second flat area, 7-a third flat area, 8-a fourth flat area;
9-bottom zone.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
referring to fig. 1, the following embodiments of the present invention take a closed three-dimensional sheet metal part as an example of a box-shaped part. The box-shaped part comprises a bottom area 9 and a bent edge area which is obtained by turning upwards along the periphery of the bottom area 9; the crimping region includes a corner region and a flat region.
The forming method of the deformed aluminum alloy closed three-dimensional sheet metal part comprises the following steps of:
the method comprises the following steps: the corner radii R1, R2, R3 and R4 of the four corner regions of the part and the fillet heights H1, H2, H3 and H4 of the four corner regions are measured.
H1-first part corner 1 crimp height;
R1-a first part corner 1 fillet radius;
H2-second part corner 2 crimp height;
R2-second part corner 2 fillet radius;
H3-third part corner 3 crimp height;
R3-third part corner 3 fillet radius;
H4-a fourth part corner 4 crimp height;
R4-a fourth part corner 4 fillet radius;
step two: and calculating the molding difficulty coefficient alpha of the four corner areas of the part.
Corner forming difficulty coefficient alpha of first part1＝H1/R1；
Corner forming difficulty coefficient alpha of second part2＝H2/R2；
Corner forming difficulty coefficient alpha of third part3＝H3/R3；
Fourth part of the turnerAngle forming difficulty coefficient alpha4＝H4/R4；
Comparison of alpha1、α2、α3、α4The size of (2).
Step three: and performing the corner regions of the part in a difficult sequence, wherein the alpha is formed to be the largest firstly, and the alpha is formed to be the smallest finally.
The key point of the step is that the primarily formed areas, namely the corner areas mentioned above, are selected, and three factors of the areas need to be satisfied, namely, the areas which cannot be formed after quenching (solid solution), namely, the areas can be formed only before quenching, the areas cannot influence the discharge of bottom stress after forming, and the areas can add rigidity and three-dimensional property to the plate after forming.
Step four: and rolling the part into a barrel shape for heat treatment, and enabling the part to be vertical to the water surface when entering water. The rolling barrel shape can increase the integral rigidity and the three-dimensional property of the parts, and the impact force generated by the water flow to the surfaces of the parts can be reduced when the parts enter water vertical to the water surface.
Step five: and flattening the bulge and the looseness of the bottom surface of the preformed part after the solution treatment.
Step six: and (3) forming all the bent edges of the part to be formed except the corner areas until the bent edges are completely attached to the die, and aging to obtain the formed closed three-dimensional sheet metal part.
The forming method provided by the invention is explained below by combining a specific box-type three-dimensional sheet metal part example.
Aiming at the box-type three-dimensional sheet metal part, the forming method provided by the invention comprises the following steps:
the method comprises the following steps: the corner radii R1, R2, R3 and R4 of the four corner regions of the part and the fillet heights H1, H2, H3 and H4 of the four corner regions are measured.
Wherein, H1 is 55, R1 is 5; h2 ═ 50, R2 ═ 4; h3 ═ 50, R3 ═ 5; h4 ═ 55, R4 ═ 6.
Step two: and calculating and comparing the molding difficulty coefficients alpha of the four corner areas of the part.
The corner forming difficulty coefficient alpha 1 of the first part is H1/R1 is 11.0;
the corner forming difficulty coefficient alpha 2 of the second part is H2/R2 is 12.5;
the corner forming difficulty coefficient alpha 3 of the third part is H3/R3 is 10;
the corner forming difficulty coefficient alpha 4 of the fourth part is H4/R4 is 9.2;
and (3) comparing the results: α 2 > α 1 > α 3 > α 4.
Step three: and performing preforming on the second part corner, the first part corner, the third part corner and the fourth part corner in sequence.
Step four: rolling the parts into a barrel shape vertical to the water surface, and then carrying out solution treatment.
Step five: and (4) sleeving a mold for manual trimming, and forming the first straight region 5, the second straight region 6, the third straight region 7 and the fourth straight region 8 to be completely attached to the mold after bulging, loosening and trimming of the bottom region 9.
It will be appreciated that the flattening of the bottom surface of the solution treated preformed part is accomplished between the end of the new quench condition of the preformed part.
Claims (8)
1. A forming method of a deformed aluminum alloy closed three-dimensional sheet metal part is characterized by comprising the following steps:
the method comprises the following steps: acquiring corner radius and the bending height of all corner areas of a part to be molded;
step two: according to the corner radius and the flanging height of all corner areas of the part to be molded, acquiring the molding difficulty coefficient of each corner area;
step three: performing each corner area of the part to be molded according to the sequence of the difficulty coefficients of each corner area from high to low;
step four: carrying out solution treatment on the preformed part;
step five: flattening bulging and loosening of the bottom surface of the preformed part after the solution treatment;
step six: and (3) forming all the bent edges of the part to be formed except the corner areas until the bent edges are completely attached to the die, and aging to obtain the formed closed three-dimensional sheet metal part.
2. The method of claim 1, wherein solutionizing the preformed part comprises:
and (3) vertically putting the preformed part into water for solution treatment.
3. The method of claim 1 or 2, wherein solutionizing the preformed part comprises:
and rolling the preformed part into a barrel shape for solution treatment.
4. The method as claimed in claim 1, wherein the obtaining of the forming difficulty coefficient of each corner region according to the corner radius and the bead height of all the corner regions of the part to be formed comprises:
and dividing the bending height of the corner area by the corner radius to obtain the molding difficulty coefficient of the corner area.
5. The method of claim 1, wherein the smoothing of bulging and loosening of the bottom surface of the solution treated preformed part comprises:
flattening the bottom surface of the solution treated preformed part is completed between the end of the new quenched state of the preformed part.
6. The method of claim 1, wherein the closed solid sheet metal part is a box-type solid sheet metal part.
7. The method of claim 1, wherein the corner region is a region that is not formable after being solid-soluted, does not affect bottom stress relief after being formed, and increases rigidity and three-dimensional properties.
8. The utility model provides a forming device of three-dimensional panel beating part is sealed to deformation aluminum alloy which characterized in that includes:
the data processing subsystem is used for acquiring the corner radius and the flanging height of all the corner areas of the part to be molded and acquiring the molding difficulty coefficient of each corner area according to the corner radius and the flanging height of all the corner areas of the part to be molded;
the preforming subsystem is used for preforming the corner areas of the part to be formed according to the sequence of the difficulty coefficients of the corner areas from high to low;
the solution treatment subsystem is used for carrying out solution treatment on the preformed part;
the flattening treatment subsystem is used for flattening bulges and looseness on the bottom surface of the preformed part after the solution treatment;
and the forming subsystem is used for forming all the bent edges of the part to be formed except the corner areas until the bent edges are completely attached to the die, and obtaining the formed closed three-dimensional sheet metal part after aging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111260741.XA CN114011962B (en) | 2021-10-28 | 2021-10-28 | Forming method and device for deformed aluminum alloy closed three-dimensional sheet metal part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111260741.XA CN114011962B (en) | 2021-10-28 | 2021-10-28 | Forming method and device for deformed aluminum alloy closed three-dimensional sheet metal part |
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| Publication Number | Publication Date |
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| CN114011962A true CN114011962A (en) | 2022-02-08 |
| CN114011962B CN114011962B (en) | 2023-05-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105081133A (en) * | 2015-08-31 | 2015-11-25 | 西北工业大学 | Method for controlling warping of web of large frame type sheet metal part |
| US20170203353A1 (en) * | 2014-07-14 | 2017-07-20 | Impression Technologies Limited | Method to operate a hydraulic press for metal sheet forming |
| CN107679309A (en) * | 2017-09-26 | 2018-02-09 | 陕西飞机工业（集团）有限公司 | A kind of preparation method of Double curve degree crimp sheet metal components spread material |
| CN108704956A (en) * | 2018-04-16 | 2018-10-26 | 西安飞机工业（集团）有限责任公司 | A kind of aluminium alloy sheet flattening method |
| CN111715783A (en) * | 2020-07-15 | 2020-09-29 | 安徽英力电子科技股份有限公司 | Rounding forming process for side wall of metal shell |
| CN113020421A (en) * | 2021-03-11 | 2021-06-25 | 东南大学 | Forming method of deep cylindrical part |
-
2021
- 2021-10-28 CN CN202111260741.XA patent/CN114011962B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170203353A1 (en) * | 2014-07-14 | 2017-07-20 | Impression Technologies Limited | Method to operate a hydraulic press for metal sheet forming |
| CN105081133A (en) * | 2015-08-31 | 2015-11-25 | 西北工业大学 | Method for controlling warping of web of large frame type sheet metal part |
| CN107679309A (en) * | 2017-09-26 | 2018-02-09 | 陕西飞机工业（集团）有限公司 | A kind of preparation method of Double curve degree crimp sheet metal components spread material |
| CN108704956A (en) * | 2018-04-16 | 2018-10-26 | 西安飞机工业（集团）有限责任公司 | A kind of aluminium alloy sheet flattening method |
| CN111715783A (en) * | 2020-07-15 | 2020-09-29 | 安徽英力电子科技股份有限公司 | Rounding forming process for side wall of metal shell |
| CN113020421A (en) * | 2021-03-11 | 2021-06-25 | 东南大学 | Forming method of deep cylindrical part |
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| CN114011962B (en) | 2023-05-23 |
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