CN112254577A - Multi-curved-surface titanium alloy plate and forming method thereof - Google Patents
Multi-curved-surface titanium alloy plate and forming method thereof Download PDFInfo
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- CN112254577A CN112254577A CN202011117616.9A CN202011117616A CN112254577A CN 112254577 A CN112254577 A CN 112254577A CN 202011117616 A CN202011117616 A CN 202011117616A CN 112254577 A CN112254577 A CN 112254577A
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 30
- 210000001015 abdomen Anatomy 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007123 defense Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H1/00—Personal protection gear
- F41H1/02—Armoured or projectile- or missile-resistant garments; Composite protection fabrics
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides a multi-curved surface titanium alloy plate and a forming method thereof, the whole multi-curved surface titanium alloy plate comprises a curved surface plate which is formed by a plurality of arc surfaces and is matched with the chest and abdomen of a human body, the front projection of the titanium alloy plate is formed by combining adjacent isosceles trapezoids and rectangles to form a hexagonal structure, and the longer side of one group of parallel opposite sides of the isosceles trapezoids is superposed with one side of the rectangle; and a plurality of gaps are formed on the edge of the titanium alloy plate. The multi-curved-surface titanium alloy plate has the advantages of light weight and good bulletproof performance when being applied to a bulletproof flashboard. In addition, the forming method of the multi-curved-surface titanium alloy plate realizes the processing and forming of the multi-curved-surface titanium alloy plate under the normal temperature condition, and has a good forming effect, so that the bulletproof performance of the bulletproof flashboard can be greatly improved when the forming method is applied to the bulletproof flashboard.
Description
Technical Field
The invention relates to the technical field of manufacturing of bulletproof shields, in particular to a multi-curved-surface titanium alloy plate. In addition, the invention also relates to a forming method of the multi-curved-surface titanium alloy plate.
Background
Body armor is an important defense device in warfare to reduce the mortality of warriors. With the informatization of modern wars and the light weight of weaponry, high-performance light-weight bulletproof plugboards are more and more important for reducing the casualty rate of wars.
At present, the existing bulletproof flashboard consists of ceramics and PE, can only defend M80 bullets and 95-type 5.8mm common bullets launched by an M14 rifle at a distance of 15M, and cannot defend 53-type 7.62 mm-caliber armor-piercing combustion bullets at a distance of 15M. In order to reduce the casualty rate of wars and improve the fighting capacity and the defense capacity of soldiers, a bulletproof flashboard capable of defending 53-type armor-piercing combustion bullets needs to be developed.
Titanium alloys are commonly used materials in ballistic armor and have excellent ballistic performance. No one has been able to apply titanium alloys in ballistic insert panels so far. The application difficulty is that the titanium alloy is difficult to be processed into a plurality of curved surfaces at normal temperature, and when the processing temperature exceeds 995 ℃ in a high-temperature heating mode, the mechanical property of the titanium alloy sheet can be changed due to phase change, so that the bulletproof property is greatly reduced.
Disclosure of Invention
In view of the above, the present invention is directed to a multi-curved titanium alloy plate, which can solve at least one of the disadvantages of the prior art and has a better application effect.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a multi-curved surface titanium alloy plate is characterized by comprising: the whole titanium alloy plate is a curved plate which is formed by a plurality of curved surfaces and matched with the chest and abdomen of a human body, the orthogonal projection of the titanium alloy plate is formed by combining adjacent isosceles trapezoids and rectangles to form a hexagonal structure, and the longer side of one group of parallel opposite sides of the isosceles trapezoids is superposed with one side of the rectangle; and a plurality of gaps are formed on the edge of the titanium alloy plate.
Further, the titanium alloy plate is Ti5322 or TC 4.
Further, the thickness of the titanium alloy plate is between 0.3 and 1 mm.
Furthermore, the notch is triangular on the front projection surface of the titanium alloy plate.
Furthermore, the openings are uniformly distributed on the edge of the isosceles trapezoid and two opposite edges of the rectangle.
Further, the openings include a first opening formed on a shorter side of a group of parallel opposite sides of the isosceles trapezoid, a second opening formed on a group of non-parallel opposite sides of the isosceles trapezoid, and a third opening formed on two opposite sides of the rectangle.
Further, the included angle forming the second notch is respectively larger than the included angle forming the first notch and the included angle forming the third notch.
Compared with the prior art, the invention has the following advantages:
the multi-curved-surface titanium alloy plate is integrally designed into a multi-curved-surface structure, and has the advantages of light weight and good bulletproof performance when being applied to a bulletproof flashboard.
Another object of the present invention is to provide a method for forming a multi-curved surface titanium alloy plate, which can process the multi-curved surface titanium alloy plate at normal temperature.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for forming a multi-curved titanium alloy plate, which is used for processing the multi-curved titanium alloy plate, and comprises the following steps:
a, cutting and blanking a titanium alloy plate according to a preset size;
step b, cutting a notch on the edge of the titanium alloy plate blanked in the step a to form a product A;
c, performing cold pressing and stretching on the product A obtained in the step B on a hydraulic press die to form a multi-curved-surface product B;
step d, rolling the product B obtained in the step c on a straight roller press;
e, after the rolling in the step d, performing rolling forming on a curved roller press
Further, the stretching pressure in the step c is between 550t and 650 t.
Further, the product B formed by the step C may repeat the steps d and e once or twice.
Compared with the prior art, the invention has the following advantages:
the forming method of the multi-curved-surface titanium alloy plate can process the titanium alloy plate with a plurality of notches into the multi-curved surface, the set notches can be used for releasing the internal stress of the titanium alloy plate in the rolling process to avoid the wrinkles caused by stress concentration, in addition, the internal stress of the titanium alloy plate can be further released by rolling the punched and stretched multi-curved-surface titanium alloy plate by a straight roller, so that the titanium alloy plate has better stability when being formed into the multi-curved surface shape, and then the multi-curved-surface titanium alloy plate is shaped by a curved roller press, so that the prepared multi-curved-surface titanium alloy plate has better forming effect.
In addition, the forming method of the multi-curved-surface titanium alloy plate realizes the processing and forming of the multi-curved-surface titanium alloy plate under the normal temperature condition, the method has fewer steps, less adopted equipment is provided, the forming quality of the prepared multi-curved-surface titanium alloy plate is better, and the multi-curved-surface titanium alloy plate processed by the method can be perfectly attached to the multi-curved-surface ceramic plate, so that the multi-curved-surface titanium alloy plate can be favorably applied to the bulletproof inserting plate, and the quality and the bulletproof performance of the bulletproof inserting plate are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a multi-curved-surface titanium alloy plate according to a first embodiment of the present invention;
FIG. 2 is a process flow chart of a method for forming a multi-curved titanium alloy plate according to a second embodiment of the present invention;
description of reference numerals:
1. a multi-curved surface titanium alloy plate; 11. a first gap; 12. a second gap; 13. and a third gap.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example one
The embodiment relates to a multi-curved surface titanium alloy plate, an exemplary structure of which is shown in fig. 1, the whole multi-curved surface titanium alloy plate comprises a curved surface plate which is formed by a plurality of arc surfaces and matched with the chest and abdomen of a human body, in the state shown in fig. 1, the front projection of the multi-curved surface titanium alloy plate 1 is formed by combining adjacent isosceles trapezoids and rectangles to form a hexagonal structure, the longer side of one group of parallel opposite sides of the isosceles trapezoids is superposed with one side of the rectangle, and a plurality of gaps are formed on the edge of the titanium alloy plate.
In this embodiment, the notch formed in the titanium alloy plate can release the internal stress of the titanium alloy plate during the rolling process and prevent the titanium alloy plate from wrinkling due to stress concentration when the titanium alloy plate is processed into a multi-curved surface.
In a specific structure, the notches formed on the titanium alloy plate are triangular on the front projection plane of the titanium alloy plate, and as shown in fig. 1, the notches are uniformly distributed on the edge of an isosceles trapezoid and two opposite edges of the rectangle. And the openings include a first opening 11 formed on a shorter side of a set of parallel opposite sides of the isosceles trapezoid, a second opening 12 formed on a set of non-parallel opposite sides of the isosceles trapezoid, and a third opening 13 formed on two opposite sides of the rectangle. Wherein the included angle forming the second gap 12 is respectively larger than the included angle forming the first gap 11 and the included angle forming the third gap 13.
Specifically, as shown in fig. 1, the included angle of the first opening 11 formed in the titanium alloy plate is 1.4 ° and is three positions that are uniformly distributed, the included angle of the second opening 12 is 1.8 ° and is two positions that are uniformly distributed on the non-parallel opposite sides, and the included angle of the third opening 13 is 1.2 ° and is four positions that are uniformly distributed on the two rectangular opposite sides. Therefore, after stamping and stretching, the internal stress of the titanium alloy plate can be released by each notch, and meanwhile, the notches can be smoothly butted through multi-curved-surface forming, so that gaps at the notches are smaller and uniform, and the forming quality and the bulletproof performance of the multi-curved-surface titanium alloy plate can be greatly improved.
The titanium alloy plate of the embodiment is preferably made of Ti5322 or TC4, and the thickness of the titanium alloy plate is 0.3-1mm, so that the titanium alloy plate can be perfectly attached to the multi-curved ceramic plate when being applied to the bulletproof inserting plate, and the high-performance light weight of the bulletproof inserting plate is favorably realized.
Example two
The embodiment relates to a forming method of a multi-curved-surface titanium alloy plate, which is used for processing the multi-curved-surface titanium alloy plate in the embodiment I, and the method comprises the following steps:
a, cutting and blanking a titanium alloy plate according to a preset size;
step b, cutting a notch on the edge of the titanium alloy plate blanked in the step a to form a product A;
c, performing cold pressing and stretching on the product A obtained in the step B on a hydraulic press die to form a multi-curved-surface product B;
step d, rolling the product B obtained in the step c on a straight roller press;
and e, rolling and forming on a curved roller press after the rolling in the step d.
Wherein the stretching pressure in the step c is between 550t and 650 t. As one preferable mode of the present embodiment, the drawing pressure is 600t, so that it is possible to prevent the titanium alloy sheet from being deformed and rebounded rapidly after the titanium alloy sheet is formed into the multi-curved surface shape due to an excessively small drawing pressure, and to prevent the titanium alloy sheet from being damaged due to an excessively large drawing pressure, which is disadvantageous for the titanium alloy sheet to be formed into the multi-curved surface shape.
In addition, the product B formed by the step C may repeat the steps d and e once or twice. Therefore, the internal stress in the product B can be fully released, and the forming effect of the multi-curved-surface shape of the titanium alloy plate is facilitated.
The process flow diagram of the forming method of the multi-curved-surface titanium alloy plate of the embodiment is shown in fig. 2, and the method sequentially comprises the steps of material preparation → blanking → notch cutting → stamping and stretching forming → straight roller rolling → curved roller rolling → manufacturing of the multi-curved-surface titanium alloy plate. The titanium alloy material is cut according to a preset size through a plate shearing machine, then punched and blanked through a cold punching die, then subjected to notch cutting through a laser cutting machine, rolled through a cylindrical straight roller to release stress, and then rolled through a curved roller.
It should be noted that the curved roller press in this embodiment includes two concave shafts and a convex shaft, the two concave shafts are rotatably disposed, the two concave shafts are spaced along the rolling direction and rotate synchronously in the same direction, and the convex shaft is disposed above the two concave shafts and rotates synchronously in the opposite direction with the concave shafts. The first concave shaft and the second concave shaft are provided with concave surfaces, the convex shaft is provided with convex surfaces corresponding to the concave surfaces, the convex surfaces follow the concave surfaces, and gaps between the concave surfaces and the convex surfaces form rolling spaces of the multi-curved-surface titanium alloy plate, so that the multi-curved-surface titanium alloy plate can be rolled and shaped.
The forming method of the multi-curved-surface titanium alloy plate can process the titanium alloy plate with a plurality of notches into the multi-curved surface, the set notches can be used for releasing the internal stress of the titanium alloy plate in the rolling process to avoid the wrinkles caused by stress concentration, in addition, the internal stress of the titanium alloy plate can be further released by rolling the punched and stretched multi-curved-surface titanium alloy plate by a straight roller, so that the titanium alloy plate has better stability when being formed into the multi-curved surface shape, and then the multi-curved-surface titanium alloy plate is shaped by a curved roller press, so that the prepared multi-curved-surface titanium alloy plate has better forming effect.
In addition, the forming method of the multi-curved-surface titanium alloy plate realizes the processing and forming of the multi-curved-surface titanium alloy plate under the normal temperature condition, the method has fewer steps, less adopted equipment is provided, the forming quality of the prepared multi-curved-surface titanium alloy plate is better, and the multi-curved-surface titanium alloy plate processed by the method can be perfectly attached to the multi-curved-surface ceramic plate, so that the multi-curved-surface titanium alloy plate can be favorably applied to the bulletproof inserting plate, and the quality and the bulletproof performance of the bulletproof inserting plate are improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A multi-curved surface titanium alloy plate is characterized in that: the whole titanium alloy plate comprises a curved plate which is formed by a plurality of curved surfaces and matched with the chest and abdomen of a human body, the orthogonal projection of the titanium alloy plate is formed by combining adjacent isosceles trapezoids and rectangles to form a hexagonal structure, and the longer side of one group of parallel opposite sides of the isosceles trapezoids is superposed with one side of the rectangle; and a plurality of gaps are formed on the edge of the titanium alloy plate.
2. The multi-curved titanium alloy sheet according to claim 1, wherein: the titanium alloy plate is Ti5322 or TC 4.
3. The multi-curved titanium alloy sheet according to claim 1, wherein: the thickness of the titanium alloy plate is 0.3-1 mm.
4. The multi-curved titanium alloy sheet according to claim 1, wherein: the opening is triangular on the front projection surface of the titanium alloy plate.
5. The multi-curved titanium alloy plate according to any one of claims 1 to 4, wherein: the openings are uniformly distributed on the edge of the isosceles trapezoid and the two opposite edges of the rectangle.
6. The multi-curved titanium alloy plate according to claim 5, wherein: the openings comprise a first opening formed on the shorter side of a group of parallel opposite sides of the isosceles trapezoid, a second opening formed on a group of non-parallel opposite sides of the isosceles trapezoid and a third opening formed on two opposite sides of the rectangle.
7. The multi-curved titanium alloy plate according to claim 6, wherein: the included angle of the second gap is larger than the included angle of the first gap and the included angle of the third gap.
8. A method for forming a multi-curved titanium alloy sheet, for processing the multi-curved titanium alloy sheet according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:
a, cutting and blanking a titanium alloy plate according to a preset size;
step b, cutting a notch on the edge of the titanium alloy plate blanked in the step a to form a product A;
c, performing cold pressing and stretching on the product A obtained in the step B on a hydraulic press die to form a multi-curved-surface product B;
step d, rolling the product B obtained in the step c on a straight roller press;
and e, rolling and forming on a curved roller press after the rolling in the step d.
9. The method of forming a multi-curved titanium alloy plate as claimed in claim 8, wherein: the stretching pressure in step c is between 550t and 650 t.
10. The method of forming a multi-curved titanium alloy plate as claimed in claim 6, wherein: the product B formed by said step C may be repeated said steps d and e one or two times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011117616.9A CN112254577A (en) | 2020-10-19 | 2020-10-19 | Multi-curved-surface titanium alloy plate and forming method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011117616.9A CN112254577A (en) | 2020-10-19 | 2020-10-19 | Multi-curved-surface titanium alloy plate and forming method thereof |
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| CN112254577A true CN112254577A (en) | 2021-01-22 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2455737A (en) * | 1944-07-29 | 1948-12-07 | Continentai Can Company Inc | Method of attaching metal closures to containers |
| US6672025B1 (en) * | 1998-09-11 | 2004-01-06 | Hunter Douglas Industries Bv | Curved building panel with stress-reducing apertures |
| US20150047406A1 (en) * | 2013-08-16 | 2015-02-19 | Rolls-Royce Plc | Method of reducing wrinkles in pressed sheet metal components |
| CN105032980A (en) * | 2015-09-09 | 2015-11-11 | 航天海鹰(哈尔滨)钛业有限公司 | Thin-wall titanium alloy complex variable-cross-section pipe forming method and application |
| CN107685779A (en) * | 2016-08-04 | 2018-02-13 | 武汉源泰铝业有限公司 | A kind of Bulk Grain transport dedicated aluminium alloy compartment and its formula and manufacturing process |
| CN108534606A (en) * | 2018-05-09 | 2018-09-14 | 湖北守能真空科技有限公司 | A kind of vacuum composite bulletproof flashboard and preparation method thereof |
| CN109604409A (en) * | 2018-11-06 | 2019-04-12 | 北京航星机器制造有限公司 | Aluminium alloy abnormity sheet metal component preparation method and processing mold for rail traffic |
-
2020
- 2020-10-19 CN CN202011117616.9A patent/CN112254577A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2455737A (en) * | 1944-07-29 | 1948-12-07 | Continentai Can Company Inc | Method of attaching metal closures to containers |
| US6672025B1 (en) * | 1998-09-11 | 2004-01-06 | Hunter Douglas Industries Bv | Curved building panel with stress-reducing apertures |
| US20150047406A1 (en) * | 2013-08-16 | 2015-02-19 | Rolls-Royce Plc | Method of reducing wrinkles in pressed sheet metal components |
| CN105032980A (en) * | 2015-09-09 | 2015-11-11 | 航天海鹰(哈尔滨)钛业有限公司 | Thin-wall titanium alloy complex variable-cross-section pipe forming method and application |
| CN107685779A (en) * | 2016-08-04 | 2018-02-13 | 武汉源泰铝业有限公司 | A kind of Bulk Grain transport dedicated aluminium alloy compartment and its formula and manufacturing process |
| CN108534606A (en) * | 2018-05-09 | 2018-09-14 | 湖北守能真空科技有限公司 | A kind of vacuum composite bulletproof flashboard and preparation method thereof |
| CN109604409A (en) * | 2018-11-06 | 2019-04-12 | 北京航星机器制造有限公司 | Aluminium alloy abnormity sheet metal component preparation method and processing mold for rail traffic |
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