CN110102969A - A kind of aluminium alloy cartridge type fuel tank inner cylinder processing method - Google Patents
A kind of aluminium alloy cartridge type fuel tank inner cylinder processing method Download PDFInfo
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- CN110102969A CN110102969A CN201910318382.5A CN201910318382A CN110102969A CN 110102969 A CN110102969 A CN 110102969A CN 201910318382 A CN201910318382 A CN 201910318382A CN 110102969 A CN110102969 A CN 110102969A
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- fuel tank
- temperature
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- tank assembly
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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
Abstract
The invention discloses a kind of aluminium alloy cartridge type fuel tank inner cylinder processing methods, including a rough turn, cold treatment, primary air-cooled, heat treatment, secondary air-cooled, secondary cold treatment, air-cooled three times and right boring, and its temperature is set to be restored to room temperature by the way of air-cooled in centre, processing dimension is easy to control after processing, structure is more stable, it is unlikely to deform, has reached guarantee processing dimension, improve the effect of product passing rate of processing；The equipment employed in cold treatment and heat treatment process is all common equipment, it is easy to accomplish, easy to operate, economical and practical reliable, processing environment also advantageously reduces production cost using existence conditions without particular/special requirement, improves production efficiency；It is compared with the traditional processing method, the process-cycle greatly shortens, and temperature, time are controllable, is conducive to the accurate guarantee of product quality.
Description
Technical field
The invention belongs to technical fields of mechanical processing, are related to a kind of shape for deviateing geometric center for irregular, mass center
The processing method of structural al alloy cartridge type fuel tank is specifically related to a kind of outer partially interior positive aluminium alloy cartridge type fuel tank inner cylinder processing side
Method.
Background technique
With the rapid development of the high-end equipment manufacture in China, aircraft engine does not manufacture the requirement in field also therewith not
It is disconnected to improve, such as " turbofan " of the engine by original " vortex-spraying type " till now.
Therefore, each spare part function also will be improved accordingly on aircraft engine, and shape also becomes increasingly complex multiplicity.In aviation
On aircraft engine, fuel tank will not only have storage lubricating oil function, at the same also want can emanation system work when generated a part
Gas and sediment in heat, energy oil and water separation, and atmosphere can be led to, to mitigate engine itself workload, improve hair
Motivation performance and working life.Engine structure and functional characteristics variation, are derived all kinds of abnormally-structured aluminium alloy cartridge types
Fuel tank new product, and fitted position precision is also continuously improved.Deviate the contour structures of geometric center in irregular shape, mass center
Aluminium alloy cartridge type fuel tank, in processing, it is the difficult processing currently encountered that the inner circle fitted position grade of tolerance, which requires to reach IT8,
Degree 100% can not be guaranteed one of size and the complicated numerous aluminium alloy aeronautical products of method by design requirement.
In the prior art, the processing method of the product can simplified summary are as follows: rough turn-natrual ageing-right boring, and the product
Following several situations are had in most commonly seen dimension overproof in the fabrication process:
(1) after processing is completed, fuel tank effective aperture becomes ellipse, and the difference of radius is more than 0.1mm；
(2) effective aperture flare, upper section aperture have been greater than upper limit deviation, middle section aperture close to basic size, and under
Hole diameter is also less than lower limit deviation；
(3) whole aperture is bigger than normal or less than normal to 0.1mm rank.
Cause above-mentioned overproof reason mainly in the fabrication process:
(1) tissue changes after components welding, welding deformation stress release, and product is quiet to be put deformation and reach 0.2mm；
(2) product is irregular, along with outer dimension is close to 400mm, causes the radius of gyration big, and fuel tank shell wooden partition is
ForMass center disalignment, product generate eccentric force when rotating at high speed, and product unidirectionally generates dynamic loading outward, increase it
Resonant frequency, cause bring it about reversible deformation.
(3) since fuel tank wall thickness is relatively thin, along with product is that postwelding machine adds part, aperture to be processed close to outer dimension 3/
4, and dimensional accuracy is accurate.After workpiece epidermis metal is cut, metal generates plastic deformation, discharges residual stress, product
It completes the process, deformation is also continuing.
Summary of the invention
To solve the above problems, the present invention provides a kind of outer partially interior positive aluminium alloy cartridge type fuel tank inner cylinder processing method,
Reach guarantee installation dimension, improves the effect of product passing rate of processing.
The present invention by cold treatment twice and primary heat treatment, and centre carry out it is air-cooled realize, concrete scheme is as follows:
A kind of aluminium alloy cartridge type fuel tank inner cylinder processing method, includes the following steps:
(1) rough turn: it is first rough turn to centre bore progress in fuel tank assembly, and reserved margin；
(2) cold treatments: after the completion of rough turn, ice-cold processing is carried out to fuel tank assembly；
(3) primary air-cooled: fuel tank assembly being stood at normal temperature, fuel tank assembly temperature is made to rise to room temperature naturally；
(4) it is heat-treated: will be heat-treated by primary air-cooled fuel tank assembly；
(5) secondary air-cooled: fuel tank assembly being stood at normal temperature, is air-cooled to room temperature；
(6) ice-cold processing secondary cold treatment: is carried out to fuel tank assembly again；
(7) air-cooled three times: fuel tank assembly being stood at normal temperature, fuel tank assembly temperature is made to rise to room temperature naturally；
(8) right boring: right boring is carried out to final size to centre bore in fuel tank assembly, guarantees precision.
It should be noted that the room temperature referred in above-mentioned processing method refers to temperature or room temperature in natural environment,
Temperature in the case of i.e. no extra heat source.
Preferably, in the step (1), the surplus≤0.4mm.
Preferably, ice cold temperature is -60 DEG C ± 5 DEG C in the step (2), and the ice-cold time is 2h~2.5h.
Preferably, heat treatment temperature is 165 DEG C ± 5 DEG C in the step (4), and the retention time is 15.5h~16.5h.
Preferably, the heat treatment carries out in drying box, keeps after being rapidly heated to required temperature.
Preferably, ice cold temperature is -60 DEG C ± 5 DEG C in the step (6), and the retention time is 2h~2.5h.
Preferably, in the step (2) and step (6), ice-cold processing carries out in high-low temperature chamber, and fast cooling is to specified
It is kept after temperature.
It should be noted that in the application it is signified be rapidly heated with fast cooling refer to liter (drop) to assigned temperature when
Between within half an hour.
The present invention has significant advantage compared with existing processing method.Outer partially interior positive aluminium alloy cartridge type fuel tank of the invention
Inner cylinder processing method is restored to its temperature often by the way of air-cooled by cold treatment twice, primary heat treatment, and in centre
Temperature, processing dimension is easy to control after processing, and structure is more stable, is unlikely to deform, and guarantee processing dimension has been reached, and is improved product and is added
The effect of work qualification rate；The equipment employed in cold treatment and heat treatment process is all common equipment, it is easy to accomplish, operation
Simplicity, economical and practical reliable, processing environment also advantageously reduces production cost using existence conditions without particular/special requirement, improves life
Produce efficiency；It is compared with the traditional processing method, the process-cycle greatly shortens, and temperature, time are controllable, is conducive to the essence of product quality
Ensure to demonstrate,prove.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of heretofore described fuel tank assembly；
Fig. 2 is the right side view of Fig. 1.
Specific embodiment
Technical solution of the present invention is further described below with reference to Fig. 1 and Fig. 2, but claimed range is not limited to
It is described.The step of not being described in detail in following embodiments is handled using conventional method.
Embodiment one
A kind of outer partially interior positive aluminium alloy cartridge type fuel tank inner cylinder processing method, includes the following steps:
(1) rough turn: center lathe is used, it is first rough turn to centre bore a in fuel tank assembly and stepped hole b progress, and reserve
The surplus of 0.4mm；
(2) cold treatments: after the completion of rough turn, fuel tank assembly is put into high-low temperature chamber, carries out ice-cold processing, wherein ice
- 60 DEG C of cold temperature, ice-cold time 2h；
(3) primary air-cooled: fuel tank assembly being taken out from high-low temperature chamber, is stood at normal temperature, makes fuel tank assembly temperature certainly
So rise to room temperature；
(4) it is heat-treated: being heat-treated being put into drying box by primary air-cooled fuel tank assembly, wherein heat treatment temperature
165 DEG C, retention time 15.5h；
(5) secondary air-cooled: fuel tank assembly being taken out from drying box, stands at normal temperature, is air-cooled to room temperature；
(6) secondary cold treatment: fuel tank assembly is put into high-low temperature chamber, carries out ice-cold processing again, wherein holding temperature-
60 DEG C, soaking time 2h；
(7) air-cooled three times: fuel tank assembly being taken out from high-low temperature chamber, is stood at normal temperature, makes fuel tank assembly temperature certainly
So rise to room temperature；
(8) right boring: using machining center or boring machine, carries out right boring to centre bore in fuel tank assembly and stepped hole, removal is pre-
Made allowance is machined to final size, guarantees precision.
After above-mentioned processing method, it is able to satisfy cylinder size requirement in product, and the production cycle shortens about 1/2, oil
Box assembly inner cylinder passing rate of processing greatly improves.Situation statistics, product after finishing are processed according to fuel tank two batches (totally 5) product
Qualification rate greatly improves production efficiency up to 100%, breaks original no eligible state, the production cycle than shortening 45h originally
More than, it is fully ensured that for the delivery time, provides new technical guarantee for China's high-precision equipment manufacturing development.
Embodiment two
A kind of outer partially interior positive aluminium alloy cartridge type fuel tank inner cylinder processing method, includes the following steps:
(1) rough turn: center lathe is used, it is first rough turn to centre bore a in fuel tank assembly and stepped hole b progress, and reserve
The surplus of 0.4mm；
(2) cold treatments: after the completion of rough turn, fuel tank assembly is put into high-low temperature chamber, carries out ice-cold processing, wherein ice
- 55 DEG C of cold temperature, ice-cold time 2.5h；
(3) primary air-cooled: fuel tank assembly being taken out from high-low temperature chamber, is stood at normal temperature, makes fuel tank assembly temperature certainly
So rise to room temperature；
(4) it is heat-treated: being heat-treated being put into drying box by primary air-cooled fuel tank assembly, wherein heat treatment temperature
160 DEG C, retention time 16.5h；
(5) secondary air-cooled: fuel tank assembly being taken out from drying box, stands at normal temperature, is air-cooled to room temperature；
(6) secondary cold treatment: fuel tank assembly is put into high-low temperature chamber, carries out ice-cold processing again, wherein holding temperature-
55 DEG C, soaking time 2.5h；
(7) air-cooled three times: fuel tank assembly being taken out from high-low temperature chamber, is stood at normal temperature, makes fuel tank assembly temperature certainly
So rise to room temperature；
(8) right boring: using machining center or boring machine, carries out right boring to centre bore in fuel tank assembly and stepped hole, removal is pre-
Made allowance is machined to final size, guarantees precision.
After above-mentioned processing method, it is able to satisfy cylinder size requirement in product, and the production cycle shortens about 1/2, oil
Box assembly inner cylinder passing rate of processing greatly improves.Situation statistics, product after finishing are processed according to fuel tank two batches (totally 5) product
Qualification rate greatly improves production efficiency up to 100%, breaks original no eligible state, the production cycle than shortening 40h originally
More than, it is fully ensured that for the delivery time, provides new technical guarantee for China's high-precision equipment manufacturing weapon development.
Embodiment three
A kind of outer partially interior positive aluminium alloy cartridge type fuel tank inner cylinder processing method, includes the following steps:
(1) rough turn: center lathe is used, it is first rough turn to centre bore a in fuel tank assembly and stepped hole b progress, and reserve
The surplus of 0.4mm；
(2) cold treatments: after the completion of rough turn, fuel tank assembly is put into high-low temperature chamber, carries out ice-cold processing, wherein ice
- 65 DEG C of cold temperature, ice-cold time 2.3h；
(3) primary air-cooled: fuel tank assembly being taken out from high-low temperature chamber, is stood at normal temperature, makes fuel tank assembly temperature certainly
So rise to room temperature；
(4) it is heat-treated: being heat-treated being put into drying box by primary air-cooled fuel tank assembly, wherein heat treatment temperature
170 DEG C, retention time 16h；
(5) secondary air-cooled: fuel tank assembly being taken out from drying box, stands at normal temperature, is air-cooled to room temperature；
(6) secondary cold treatment: fuel tank assembly is put into high-low temperature chamber, carries out ice-cold processing again, wherein holding temperature-
65 DEG C, soaking time 2.3h；
(7) air-cooled three times: fuel tank assembly being taken out from high-low temperature chamber, is stood at normal temperature, makes fuel tank assembly temperature certainly
So rise to room temperature；
(8) right boring: using machining center or boring machine, carries out right boring to centre bore in fuel tank assembly and stepped hole, removal is pre-
Made allowance is machined to final size, guarantees precision.
After above-mentioned processing method, it is able to satisfy cylinder size requirement in product, and the production cycle shortens about 1/2, oil
Box assembly inner cylinder passing rate of processing greatly improves.Situation statistics, product after finishing are processed according to fuel tank two batches (totally 5) product
Qualification rate greatly improves production efficiency up to 100%, breaks original no eligible state, the production cycle than shortening 40h originally
More than, it is fully ensured that for the delivery time, provides new technical guarantee for China's high-precision equipment preparation.
After rough turn, interiors of products tissue changes, and internal stress is generated, in product following process, storage and use process
In, internal stress constantly acts on, and will affect the precision of product working position；And after heat treatment, interior tissue still retains more
Retained austenite, this retained austenite are unstable tissues, in storage and use process, can be constantly occurring variation,
To change the dimensional accuracy of product working position.Using cold treatment method, then effect of the product internal stress to product can be reduced,
The retained austenite in tissue is reduced, the structural stability and hardness of part are improved, reduces machining deformation, stablizes and uses size.
In the above-described embodiments, the air-cooled time, weather was influenced by cold treatment and heat treatment and at that time, can be because of weather
Situation is different and is fluctuated, but the variation of time only will affect its production cycle, the qualification rate without will affect product.
Claims (7)
1. a kind of aluminium alloy cartridge type fuel tank inner cylinder processing method, which comprises the steps of:
(1) rough turn: it is first rough turn to centre bore progress in fuel tank assembly, and reserved margin；
(2) cold treatments: after the completion of rough turn, ice-cold processing is carried out to fuel tank assembly；
(3) primary air-cooled: fuel tank assembly being stood at normal temperature, fuel tank assembly temperature is made to rise to room temperature naturally；
(4) it is heat-treated: will be heat-treated by primary air-cooled fuel tank assembly；
(5) secondary air-cooled: fuel tank assembly being stood at normal temperature, is air-cooled to room temperature；
(6) ice-cold processing secondary cold treatment: is carried out to fuel tank assembly again；
(7) air-cooled three times: fuel tank assembly being stood at normal temperature, fuel tank assembly temperature is made to rise to room temperature naturally；
(8) right boring: right boring is carried out to final size to centre bore in fuel tank assembly, guarantees precision.
2. a kind of aluminium alloy cartridge type fuel tank inner cylinder processing method according to claim 1, it is characterised in that: the step
(1) in, the surplus≤0.4mm.
3. a kind of aluminium alloy cartridge type fuel tank inner cylinder processing method according to claim 1, it is characterised in that: the step
(2) ice cold temperature is -60 DEG C ± 5 DEG C in, and the ice-cold time is 2h~2.5h.
4. a kind of aluminium alloy cartridge type fuel tank inner cylinder processing method according to claim 1, it is characterised in that: the step
(4) heat treatment temperature is 165 DEG C ± 5 DEG C in, and the retention time is 15.5h~16.5h.
5. a kind of aluminium alloy cartridge type fuel tank inner cylinder processing method according to claim 4, it is characterised in that: the heat treatment
It carries out in drying box, is kept after being rapidly heated to required temperature.
6. a kind of aluminium alloy cartridge type fuel tank inner cylinder processing method according to claim 1, it is characterised in that: the step
(6) ice cold temperature is -60 DEG C ± 5 DEG C in, and the retention time is 2h~2.5h.
7. a kind of aluminium alloy cartridge type fuel tank inner cylinder processing method according to claim 1, it is characterised in that: the step
(2) and in step (6), ice-cold processing carries out in high-low temperature chamber, keeps after fast cooling to assigned temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910318382.5A CN110102969A (en) | 2019-04-19 | 2019-04-19 | A kind of aluminium alloy cartridge type fuel tank inner cylinder processing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910318382.5A CN110102969A (en) | 2019-04-19 | 2019-04-19 | A kind of aluminium alloy cartridge type fuel tank inner cylinder processing method |
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| CN105522353A (en) * | 2016-02-25 | 2016-04-27 | 西安北方光电科技防务有限公司 | Method for machining high-accuracy and thin-wall parts through common numerical control milling machine equipment |
| CN105537879A (en) * | 2016-01-27 | 2016-05-04 | 西安北方光电科技防务有限公司 | Machining method used for thin-wall cavity type magnesium-lithium alloy part |
| CN105624390A (en) * | 2016-03-25 | 2016-06-01 | 洛阳汇工轴承科技有限公司 | Heat treatment method of large thin-wall stainless steel bearing ring |
| CN109128728A (en) * | 2018-11-17 | 2019-01-04 | 景德镇兴航科技开发有限公司 | A kind of consumption fuel tank thin wall processing technology |
-
2019
- 2019-04-19 CN CN201910318382.5A patent/CN110102969A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103421940A (en) * | 2013-09-05 | 2013-12-04 | 中原特钢股份有限公司 | Technological method for AISI4140 and AISI 4340 constructional steel forged piece quenching and tempering through one-time thermal cycling |
| CN105537879A (en) * | 2016-01-27 | 2016-05-04 | 西安北方光电科技防务有限公司 | Machining method used for thin-wall cavity type magnesium-lithium alloy part |
| CN105522353A (en) * | 2016-02-25 | 2016-04-27 | 西安北方光电科技防务有限公司 | Method for machining high-accuracy and thin-wall parts through common numerical control milling machine equipment |
| CN105624390A (en) * | 2016-03-25 | 2016-06-01 | 洛阳汇工轴承科技有限公司 | Heat treatment method of large thin-wall stainless steel bearing ring |
| CN109128728A (en) * | 2018-11-17 | 2019-01-04 | 景德镇兴航科技开发有限公司 | A kind of consumption fuel tank thin wall processing technology |
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Application publication date: 20190809 |