CN104384281B - Aluminium lithium alloy sheet metal part hot forming processing method - Google Patents
Aluminium lithium alloy sheet metal part hot forming processing method Download PDFInfo
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- CN104384281B CN104384281B CN201410703407.0A CN201410703407A CN104384281B CN 104384281 B CN104384281 B CN 104384281B CN 201410703407 A CN201410703407 A CN 201410703407A CN 104384281 B CN104384281 B CN 104384281B
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- hot
- lithium alloy
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- aluminium lithium
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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
- B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/01—Selection of materials
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention relates to a kind of aluminium lithium alloy sheet metal part hot forming processing method, comprise the following steps: 1) design of hot-forming die: 1.1) the material selection Mid-Si Mo Cast Iron of mould, the roughness of profile reaches Ra1.6；1.2) guide plate of upper mold and the one side gap of lower mold are at more than 0.5mm；1.3) positioner of part is set in mould；2) hot forming tool hot forming aluminium lithium alloy part is used；2.1) mould is fixed with upper and lower workbench respectively, and carries out opening and closing mould test；2.2) graphite is all smeared on aluminium lithium alloy woollen surface and die forming surface；2.3) part Warm status preform；2.4) the hot formed final shaping of part.The method is meeting at a temperature of aluminium lithium alloy material Uniform Flow, it is achieved use hot forming mould to ensure part geometry form and dimensional precision, cracking when overcoming part forming and buckling phenomena, it is ensured that aluminium lithium alloy part forms at steady-state.
Description
Technical field
The present invention relates to a kind of aluminium lithium alloy sheet metal part hot forming processing method, belong to a kind of processing method.
Background technology
It is bigger that aircraft aluminium lithium alloy sheet metal part adds resilience in man-hour, the part that design of part is the most easily shaped, typically use cold machine-shaping, multiplex cold pressing or manual striking accomplishes shape, part drawing amplitude is difficult to more greatly to the part shaped, manual striking cannot be used to accomplish shape, if employing cold-press moulding, occur during shaping that part cracking and buckling phenomena are the most serious, need many molds, multiple operations carry out stamping, die cost is higher, add and use man-hour equipment and operator more, it is applicable to high-volume part processing, for the feature of airplane parts small lot inapplicable.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of aluminium lithium alloy sheet metal part hot forming processing method, the method is meeting at a temperature of aluminium lithium alloy material Uniform Flow, realize using hot forming mould to ensure part geometry form and dimensional precision, cracking when overcoming part forming and buckling phenomena, it is ensured that aluminium lithium alloy part forms at steady-state.
For solving problem above, the concrete technical scheme of the present invention is as follows: a kind of aluminium lithium alloy sheet metal part hot forming processing method, it is characterised in that comprise the following steps:
1) design of hot-forming die:
1.1) the material selection Mid-Si Mo Cast Iron of mould, structure is pressed design drawing processing, and is ensured that the roughness of die face reaches Ra1.6；
1.2) in upper mold, it is connected by screw guide plate, and the one side gap of guide plate and lower mold is at more than 0.5mm；
1.3) positioner of part is set in mould, is respectively provided with hoisting hook rod, upper and lower mould both sides processing presser feet groove at upper and lower mould；
2) hot forming tool hot forming aluminium lithium alloy part is used:
2.1) use boom hoisting, hot-forming die is hung to hot former lower table, and is fixed with upper and lower workbench respectively, and carry out die sinking, matched moulds test, it is ensured that open and close is free and relaxed；
2.2) graphite is all smeared on aluminium lithium alloy woollen surface and die forming surface；
2.3) part Warm status preform:
2.3.1) opening hot former, matched moulds rear mold is heated up to 400 DEG C-420 DEG C, carries out a point mould；
2.3.2) part woollen is positioned by positioner, preheat 5-8 minute；
2.3.3) upper mold declines and carries out preform for the first time, when arrival part occurs can passing through the manual depth of folding eliminated, rises upper mold；
2.3.4) take out the most preformed part, and strike repair a die on carry out manual eliminating fold；
2.3.5) after eliminating fold, repeat 2.3.2-2.3.4 step, amount to and need five preforms, make the preform degree of depth progressively deepen；
2.4) the hot formed final shaping of part:
2.4.1) mold temperature on hot former being maintained at 400-420 DEG C, upper mold carries out a point mould；
2.4.2) part after being preformed by is positioned by positioner, preheats 5-8 minute；
2.4.3) upper and lower mould matched moulds, clamping pressure 50 tons, pressurize 10-20 minute；
2.4.4) upper mold rises, and i.e. can be taken off the aluminium lithium alloy part after shaping.
The aluminium lithium alloy sheet metal part hot forming processing method of the application, is difficult to more greatly the aircraft aluminium lithium alloy sheet metal part shaped for part drawing amplitude, uses above-mentioned technique to can be good at solving the problems referred to above, it is possible to achieve:
(1) hot-forming die is used to ensure geometry and the dimensional accuracy of part；
(2) part cracking and fold more serious phenomenon when solving to shape；
(3) just the machining stress of part forming is eliminated hot formed while, reduce follow-up stress relief annealing and school shape manufacturing procedure；
(4) heat forming technology is used, it is possible to reduce the mould of operation, equipment and operator's quantity required needed for part forming；
(5) only form by one set of die, can significantly save Making mold expense；
(6) after shaping, part status is stable, improves part working (machining) efficiency.
Accompanying drawing explanation
Fig. 1 is the front view of hot-forming die.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Wherein, 1-lower mold, 2-upper mold, 3-guide plate, 4-bolt, 5-alignment pin, 6-part.
Detailed description of the invention
A kind of aluminium lithium alloy sheet metal part hot forming processing method, comprises the following steps:
1) design of hot-forming die:
1.1) the material selection Mid-Si Mo Cast Iron of mould, structure is pressed design drawing processing, and is ensured that the roughness of die face reaches Ra1.6, thus geometry and dimension precision requirement after ensureing part forming；
1.2) in upper mold, it is connected by screw guide plate, and the one side gap of guide plate and lower mold is at more than 0.5mm, to avoid mould cannot freely carry out the requirement of die sinking, matched moulds in a heated state；
1.3) positioner of part is set in mould, is respectively provided with hoisting hook rod, upper and lower mould both sides processing presser feet groove at upper and lower mould；
2) hot forming tool hot forming aluminium lithium alloy part is used:
2.1) use boom hoisting, hot-forming die is hung to hot former lower table, and is fixed with upper and lower workbench respectively, and carry out die sinking, matched moulds test, it is ensured that open and close is free and relaxed；
2.2) graphite is all smeared on aluminium lithium alloy woollen surface and die forming surface；
2.3) part Warm status preform:
2.3.1) opening hot former, matched moulds rear mold is heated up to 400 DEG C-420 DEG C, carries out a point mould；
2.3.2) part woollen is positioned by positioner, preheat 5-8 minute；
2.3.3) upper mold declines and carries out preform for the first time, when arrival part occurs can passing through the manual depth of folding eliminated, rises upper mold；
2.3.4) take out the most preformed part, and strike repair a die on carry out manual eliminating fold；
2.3.5) after eliminating fold, repeat 2.3.2-2.3.4 step, amount to and need five preforms, make the preform degree of depth progressively deepen；
2.4) the hot formed final shaping of part:
2.4.1) mold temperature on hot former being maintained at 400-420 DEG C, upper mold carries out a point mould；
2.4.2) part after being preformed by is positioned by positioner, preheats 5-8 minute；
2.4.3) upper and lower mould matched moulds, clamping pressure 50 tons, pressurize 10-20 minute；
2.4.4) upper mold rises, and i.e. can be taken off the aluminium lithium alloy part after shaping.
This hot forming processing method, shape that drawing amplitude is relatively big, the aluminium lithium alloy sheet metal part of forming difficulty, use particular manufacturing craft on hot former, shape at a certain temperature, it is achieved eliminate the cracking and buckling phenomena occurred in forming process, it is ensured that the geometry of part and dimensional accuracy, forming process is stablized controlled, part forming eliminates machining stress simultaneously, adjusts organization and improves structure stability, reduces follow-up stress relief annealing and school shape manufacturing procedure.
Claims (1)
1. an aluminium lithium alloy sheet metal part hot forming processing method, it is characterised in that comprise the following steps:
1) design of hot-forming die:
1.1) the material selection Mid-Si Mo Cast Iron of mould, structure is pressed design drawing processing, and is ensured that the roughness of die face reaches Ra1.6；
1.2) in upper mold, it is connected by screw guide plate, and the one side gap of guide plate and lower mold is at more than 0.5mm；
1.3) positioner of part is set in mould, is respectively provided with hoisting hook rod, upper and lower mould both sides processing presser feet groove at upper and lower mould；
2) hot forming tool hot forming aluminium lithium alloy part is used:
2.1) use boom hoisting, hot-forming die is hung to hot former lower table, and is fixed with upper and lower workbench respectively, and carry out die sinking, matched moulds test, it is ensured that open and close is free and relaxed；
2.2) graphite is all smeared on aluminium lithium alloy woollen surface and die forming surface；
2.3) part Warm status preform:
2.3.1) opening hot former, matched moulds rear mold is heated up to 420 DEG C, carries out a point mould；
2.3.2) part woollen is positioned by positioner, preheat 5-8 minute；
2.3.3) upper mold declines and carries out preform for the first time, when arrival part occurs can passing through the manual depth of folding eliminated, rises upper mold；
2.3.4) take out the most preformed part, and strike repair a die on carry out manual eliminating fold；
2.3.5) after eliminating fold, repeat 2.3.2-2.3.4 step, amount to and need five preforms, make the preform degree of depth progressively deepen；
2.4) the hot formed final shaping of part:
2.4.1) mold temperature on hot former being maintained at 420 DEG C, upper mold carries out a point mould；
2.4.2) part after being preformed by is positioned by positioner, preheats 5-8 minute；
2.4.3) upper and lower mould matched moulds, clamping pressure 50 tons, pressurize 10-20 minute；
2.4.4) upper mold rises, and i.e. can be taken off the aluminium lithium alloy part after shaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410703407.0A CN104384281B (en) | 2014-11-26 | 2014-11-26 | Aluminium lithium alloy sheet metal part hot forming processing method |
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| CN201410703407.0A CN104384281B (en) | 2014-11-26 | 2014-11-26 | Aluminium lithium alloy sheet metal part hot forming processing method |
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| CN104384281A CN104384281A (en) | 2015-03-04 |
| CN104384281B true CN104384281B (en) | 2016-09-14 |
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| CN115007740B (en) * | 2022-06-01 | 2024-08-20 | 沈阳飞机工业（集团）有限公司 | Processing tool and processing method for high-performance aluminum-lithium alloy variable-angle aviation part |
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| US20090320972A1 (en) * | 2008-06-26 | 2009-12-31 | Morganti Richard J | Method for tempering an aluminum alloy |
| CN103882351B (en) * | 2014-03-05 | 2016-01-13 | 中南大学 | A kind of method preparing Al-Li alloy superplasticity sheet material |
| CN103990664A (en) * | 2014-06-11 | 2014-08-20 | 沈阳飞机工业（集团）有限公司 | Method for forming titanium alloy sheet metal part |
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