CN109550899A - Fusible pattern and counter-pressure casting combined shaping method - Google Patents
Fusible pattern and counter-pressure casting combined shaping method Download PDFInfo
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- CN109550899A CN109550899A CN201811420752.8A CN201811420752A CN109550899A CN 109550899 A CN109550899 A CN 109550899A CN 201811420752 A CN201811420752 A CN 201811420752A CN 109550899 A CN109550899 A CN 109550899A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The present invention provides a kind of fusible patterns and counter-pressure casting combined shaping method, hot investment casting part is produced using fusible pattern and counter-pressure casting combined forming process, this method had both had the characteristics that dimensional accuracy was high, surface quality is good, have product fine and close again simultaneously, the good advantage of internal soundness is the effective way of thin-wall member forming.Utilize method of the invention, it can not only realize the whole near-net forming of labyrinth, it increases substantially the utilization rate of material and reduces production cost, meet short, with short production cycle, the high-efficient manufacture requirement of process, but also the weak links such as welding in labyrinth, riveting, mechanical connection can be reduced, labyrinth overall performance is improved, realizes the lightweight of component.
Description
Technical field
The present invention relates to a kind of fusible patterns and counter-pressure casting combined shaping method
Background technique
Currently, mainly applying sand casting process in equipment component manufacture, have easy to operate, lower-cost excellent
Gesture.With equipment lightweight requirements continuous improvement, sand casting in terms of manufacturing complex component existing some problems also by
Gradually highlight:
(1) dimensional accuracy is low: sand casting use molding modeling, manufacture complex component when, need to manufacture muti-piece casting mold and
Row group type and casting again after sand core, founding molding, group type process generate the dimensional accuracy of type chamber and final casting larger
It influences.In addition, sand casting also needs to also increase the passive weight of component using pattern draft, reduce the light of weaponry
Quantization level.
(2) casting thin-wall construction forming difficulty is high: sand casting is poor in terms of special-shaped and thin-wall construction forming capacity, because
This special-shaped, thin-wall construction can not pass through sand casting near-net-shape, it is desirable that forming wall thickness 3mm or more.
Summary of the invention
The purpose of the present invention is to provide a kind of fusible patterns and counter-pressure casting combined shaping method.
To solve the above problems, the present invention provides a kind of fusible pattern and counter-pressure casting combined shaping method, comprising:
Step S1 suppresses hot investment casting wax-pattern；
Step S2 carries out group weldering to the hot investment casting wax-pattern, by part dedicated pouring technique by qualified hot investment casting
Wax-pattern and corresponding dead head are combined, the mould group combined；
Step S3 carries out oil removing to the mould group combined；
Step S4 prepares hanging coating；
Step S5 carries out hanging sand to the mould group；
The mould group is dried in step S6；
Step S7 carries out electric heating dewaxing to the mould group；
Step S8 roasts the mould group；
Crucible equipped with fusing molten metal is transferred in differential pressure equipment by step S9, guarantees that aluminium alloy sealer is complete
It is good；
Step S10, partition and sealing ring in placement, being put into casting equipment among stalk therefrom partition；
Mould group after roasting is embedded in sandbox by step S11, is aligned stalk cast gate, tests simultaneously connection signal line；
Casting process parameters are arranged in step S12, start casting program in console；
Step S13 is opened to locking device, is transferred from shell, casting complete.
Further, in the above-mentioned methods, step S1, suppress hot investment casting wax-pattern before, further includes:
The mold temperature of hot investment casting wax-pattern is suppressed less than 30 DEG C, wax injector air pressure is 0.6MPa~0.8MPa.
Further, in the above-mentioned methods, after compacting hot investment casting wax-pattern, further includes:
1min~2min is cooled down after the completion, is dismantled the mold and is taken out hot investment casting wax-pattern, and cools down 10min into the water
More than.
Further, in the above-mentioned methods, by part dedicated pouring technique by qualified hot investment casting wax-pattern and corresponding
Dead head is combined, after the mould group combined, further includes:
The mould group combined is stored one week under 15 DEG C~25 DEG C environment.
Further, in the above-mentioned methods, oil removing is carried out to the mould group combined, comprising:
The mould group for preparing coating is put into the container for filling degreaser, mould group is carefully cleaned with banister brush or gauze and carries out clearly
Remove oil；
After oil removing, it is to clean up in 15 DEG C~25 DEG C water that mould group, which is immersed in temperature,.
Further, in the above-mentioned methods, it prepares in hanging coating, the density of the coating is 1.64~1.72.
Further, in the above-mentioned methods, hanging sand is carried out to the mould group, comprising:
Mould group is continuously immersed in coating 2 times~3 times, to form superficial layer on the surface of mould group；
It is immersed in coating 1 time~2 times according to part shape, to form enhancement layer on the superficial layer.
Further, in the above-mentioned methods, the mould group is dried, comprising:
It is dry that nature, ventilation and ammonia are successively carried out to the mould group.
Further, in the above-mentioned methods, to the mould group carry out electric heating dewaxing in, dewaxing furnace temperature be 120 DEG C~
140 DEG C, keep the temperature 1.5h~3h.
Further, in the above-mentioned methods, in roasting to the mould group, temperature is put into no more than 500 DEG C of roasters
It is interior, it heats up 3h~4h to 900 DEG C, and keep the temperature 2h~2.5h.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, fusible pattern formwork technique produce it is accurate complicated, close to product final form, do not process or process less can be direct
The metal parts or exquisite craftwork used, are a kind of near net-shaped metal liquid forming technologies.
2, an important feature of counter-pressure casting is that molten metal is made to be solidified and be crystallized under pressure.Casting has
Good mechanics and mechanical performance, consistency height, stay in grade, accurate size.
3, the present invention combines precision casting technology and counter-pressure casting technology, realize the high quality of typical thin-wall member without
Surplus forming, has the characteristics that stock utilization is high, at low cost, the period is short, is that the important forming mode of the following high-end casting mentions
Metal-forming techniques ability is risen to be of great significance.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, With reference to embodiment
The present invention is described in further detail.
The present invention provides a kind of fusible pattern and counter-pressure casting combined shaping method, comprising:
Step S1 suppresses hot investment casting wax-pattern；
Step S2 carries out group weldering to the hot investment casting wax-pattern, by part dedicated pouring technique by qualified hot investment casting
Wax-pattern and corresponding dead head are combined, the mould group combined；
Step S3 carries out oil removing to the mould group combined；
Step S4 prepares hanging coating；
Step S5 carries out hanging sand to the mould group；
The mould group is dried in step S6；
Step S7 carries out electric heating dewaxing to the mould group；
Step S8 roasts the mould group；
Crucible equipped with fusing molten metal is transferred in differential pressure equipment by step S9, guarantees that aluminium alloy sealer is complete
It is good；
Step S10, partition and sealing ring in placement, being put into casting equipment among stalk therefrom partition；
Mould group after roasting is embedded in sandbox by step S11, is aligned stalk cast gate, tests simultaneously connection signal line；
Casting process parameters are arranged in step S12, start casting program in console；
Step S13 is opened to locking device, is transferred from shell, casting complete.
Here, the present invention includes compacting hot investment casting wax-pattern, the weldering of wax-pattern group, wax-pattern oil removing, hanging, shell hanging sand, shell
The processes such as dry, electric heating dewaxing, Baking and differential pressure casting.The method of the present invention realizes the high quality nothing left of typical thin-wall member
Amount forming, has the characteristics that stock utilization is high, at low cost, the period is short, is the important forming mode of the following high-end casting.
Model casting is also known as lost-wax casting, is a kind of few casting method without surplus, has dimensional accuracy height, surface quality
The advantages that good, but it is confined to the production of miniature precision casting.Counter-pressure casting is also referred to as Counter pressure casting, is tied under low pressure casting and pressure
The combination of two kinds of technique of crystal solidification has the features such as filling is steady, and internal soundness is high.The present invention proposes to cast using fusible pattern and differential pressure
Combined forming process production hot investment casting part is made, this method had not only had the characteristics that dimensional accuracy was high, surface quality is good, but also had
There is product densification, the good advantage of internal soundness is the effective way of thin-wall member forming.Using method of the invention, not only may be used
The whole near-net forming for realizing labyrinth, increases substantially the utilization rate of material and reduces production cost, and it is short, raw to meet process
The manufacture requirement that the period is short, high-efficient is produced, but also the weak links such as welding in labyrinth, riveting, mechanical connection can be reduced,
Labyrinth overall performance is improved, realizes the lightweight of component.
Preferably, step S1, suppress hot investment casting wax-pattern before, further includes:
The mold temperature of hot investment casting wax-pattern is suppressed less than 30 DEG C, wax injector air pressure is 0.6MPa~0.8MPa.
Preferably, step S1, suppress hot investment casting wax-pattern after, further includes:
1min~2min is cooled down after the completion, is dismantled the mold and is taken out hot investment casting wax-pattern, and cools down 10min into the water
More than.
Preferably, step S2, by part dedicated pouring technique by qualified hot investment casting wax-pattern and corresponding dead head into
Row combines, after the mould group combined, further includes:
The mould group combined is stored one week under 15 DEG C~25 DEG C environment.
Preferably, step S3 carries out oil removing to the mould group combined, comprising:
The mould group for preparing coating is put into the container for filling degreaser, mould group is carefully cleaned with banister brush or gauze and carries out clearly
Remove oil；
After oil removing, it is to clean up in 15 DEG C~25 DEG C water that mould group, which is immersed in temperature,.
Preferably, step S4 is prepared in hanging coating, and the density of the coating is 1.64~1.72.
Preferably, step S5 carries out hanging sand to the mould group, comprising:
Mould group is continuously immersed in coating 2 times~3 times, to form superficial layer on the surface of mould group；
It is immersed in coating 1 time~2 times according to part shape, to form enhancement layer on the superficial layer.
Preferably, in step S6, the mould group is dried, comprising:
It is dry that nature, ventilation and ammonia are successively carried out to the mould group.
Preferably, step S7 carries out in electric heating dewaxing the mould group, and dewaxing furnace temperature is 120 DEG C~140 DEG C, heat preservation
1.5h~3h.
Preferably, step S8, roasts the mould group, is put into no more than 500 DEG C roasters of temperature, heat up 3h
~4h to 900 DEG C, and keep the temperature 2h~2.5h.
Embodiment 1
By taking the main frame rack of certain equipment configuration part as an example, material ZL101A, size Φ 500mm at maximum outer circle, height
300mm, most thin position are 3mm, and this method comprises the following steps that
S1, compacting hot investment casting wax-pattern, wax injector air pressure are 0.6MPa；
S2, the weldering of wax-pattern group, model of the bottom filling in conjunction with the running channel of gap are combined；
S3, dehydrated alcohol 60%, tap water (15 DEG C~25 DEG C of water temperature) 40%, with banister brush or gauze carefully clean mould group into
Row cleaning oil removing；
S4, preparation hot investment casting hanging coating, coating density 1.65；
It is continuously immersed in S5, surface coating 2 times, enhancement layer immerses 1 time；
S6, mould group is spontaneously dried under 15 DEG C~25 DEG C of temperature of ventilating air, by mould after the completion of natural drying
Group puts exhausting cabinet into and is aerated drying, and after the completion of aeration-drying, mould group is put into ammonia case by every layer of drying time 15min,
Drying time 20min.
S7,120 DEG C of furnace temperature of dewaxing, keep the temperature 1.5h.
S8,3h to 900 DEG C of heating, keep the temperature 2h.
S9, the crucible equipped with fusing molten metal is transferred in differential pressure equipment, aluminium alloy sealer is intact；
Partition and sealing ring in S10, placement, being put into casting equipment among stalk therefrom partition；
S11, the shell after roasting is embedded in sandbox, is aligned stalk cast gate, test simultaneously connection signal line；
S12, setting casting process parameters start casting program in console；
S13, it is opened to locking device, is transferred from shell, casting complete.
Embodiment 2
With warhead cabin shell, material ZL201, diameter of phi 340mm, height 480mm, inner surface requires not process, should
Casting is whole cylindrical structure, and this method comprises the following steps that
S1, compacting hot investment casting wax-pattern, wax injector air pressure are 0.8MPa；
S2, the weldering of wax-pattern group, model of the bottom filling in conjunction with the running channel of gap are combined；
S3, dehydrated alcohol 60%, tap water (15 DEG C~25 DEG C of water temperature) 40%, with banister brush or gauze carefully clean mould group into
Row cleaning oil removing；
S4, preparation hot investment casting hanging coating, coating density 1.70；
It is continuously immersed in S5, surface coating 3 times, enhancement layer immerses 2 times；
S6, mould group is spontaneously dried under 15 DEG C~25 DEG C of temperature of ventilating air, by mould after the completion of natural drying
Group puts exhausting cabinet into and is aerated drying, and after the completion of aeration-drying, mould group is put into ammonia case by every layer of drying time 20min,
Drying time 30min.
S7,140 DEG C of furnace temperature of dewaxing, keep the temperature 2.0h.
S8,4h to 900 DEG C of heating, keep the temperature 2.5h.
S9, the crucible equipped with fusing molten metal is transferred in differential pressure equipment, aluminium alloy sealer is intact；
Partition and sealing ring in S10, placement, being put into casting equipment among stalk therefrom partition；
S11, the shell after roasting is embedded in sandbox, is aligned stalk cast gate, test simultaneously connection signal line；
S12, setting casting process parameters start casting program in console；
S13, it is opened to locking device, is transferred from shell, casting complete.
Embodiment 3
Tank bracket overall dimensions be 260mm × 310mm × 220mm, material ZL114A, CT7 grades of dimension precision requirement,
Average wall thickness 5mm, this method comprises the following steps that
S1, compacting hot investment casting wax-pattern, wax injector air pressure are 0.7MPa；
S2, the weldering of wax-pattern group, gap running channel model；
S3, dehydrated alcohol 60%, tap water (15 DEG C~25 DEG C of water temperature) 40%, with banister brush or gauze carefully clean mould group into
Row cleaning oil removing；
S4, preparation hot investment casting hanging coating, coating density 1.68；
It is continuously immersed in S5, surface coating 2 times, enhancement layer immerses 2 times；
S6, mould group is spontaneously dried under 15 DEG C~25 DEG C of temperature of ventilating air, by mould after the completion of natural drying
Group puts exhausting cabinet into and is aerated drying, and after the completion of aeration-drying, mould group is put into ammonia case by every layer of drying time 20min,
Drying time 30min.
S7,140 DEG C of furnace temperature of dewaxing, keep the temperature 1.5h.
S8,3h to 900 DEG C of heating, keep the temperature 2.0h.
S9, the crucible equipped with fusing molten metal is transferred in differential pressure equipment, aluminium alloy sealer is intact；
Partition and sealing ring in S10, placement, being put into casting equipment among stalk therefrom partition；
S11, the shell after roasting is embedded in sandbox, is aligned stalk cast gate, test simultaneously connection signal line；
S12, setting casting process parameters start casting program in console；
S13, it is opened to locking device, is transferred from shell, casting complete.
Compared with prior art, this present invention have it is following the utility model has the advantages that
1, fusible pattern formwork technique produce it is accurate complicated, close to product final form, do not process or process less can be direct
The metal parts or exquisite craftwork used, are a kind of near net-shaped metal liquid forming technologies.
2, an important feature of counter-pressure casting is that molten metal is made to be solidified and be crystallized under pressure.Casting has
Good mechanics and mechanical performance, consistency height, stay in grade, accurate size.
3, the present invention combines precision casting technology and counter-pressure casting technology, realize the high quality of typical thin-wall member without
Surplus forming, has the characteristics that stock utilization is high, at low cost, the period is short, is that the important forming mode of the following high-end casting mentions
Metal-forming techniques ability is risen to be of great significance.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Obviously, those skilled in the art can carry out various modification and variations without departing from spirit of the invention to invention
And range.If in this way, these modifications and changes of the present invention belong to the claims in the present invention and its equivalent technologies range it
Interior, then the invention is also intended to include including these modification and variations.
Claims (10)
1. a kind of fusible pattern and counter-pressure casting combined shaping method characterized by comprising
Step S1 suppresses hot investment casting wax-pattern；
Step S2 carries out group weldering to the hot investment casting wax-pattern, by part dedicated pouring technique by qualified hot investment casting wax-pattern
It is combined with corresponding dead head, the mould group combined；
Step S3 carries out oil removing to the mould group combined；
Step S4 prepares hanging coating；
Step S5 carries out hanging sand to the mould group；
The mould group is dried in step S6；
Step S7 carries out electric heating dewaxing to the mould group；
Step S8 roasts the mould group；
Crucible equipped with fusing molten metal is transferred in differential pressure equipment by step S9, guarantees that aluminium alloy sealer is intact；
Step S10, partition and sealing ring in placement, being put into casting equipment among stalk therefrom partition；
Mould group after roasting is embedded in sandbox by step S11, is aligned stalk cast gate, tests simultaneously connection signal line；
Casting process parameters are arranged in step S12, start casting program in console；
Step S13 is opened to locking device, is transferred from shell, casting complete.
2. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that step S1, compacting are accurate
Before casting wax-pattern, further includes:
The mold temperature of hot investment casting wax-pattern is suppressed less than 30 DEG C, wax injector air pressure is 0.6MPa~0.8MPa.
3. fusible pattern as claimed in claim 2 and counter-pressure casting combined shaping method, which is characterized in that compacting hot investment casting wax-pattern
Later, further includes:
Cool down 1min~2min after the completion, dismantle the mold and take out hot investment casting wax-pattern, and cool down into the water 10min with
On.
4. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that press part dedicated pouring work
Qualified hot investment casting wax-pattern and corresponding dead head are combined by skill, after the mould group combined, further includes:
The mould group combined is stored one week under 15 DEG C~25 DEG C environment.
5. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that the mould group combined into
Row oil removing, comprising:
The mould group for preparing coating is put into the container for filling degreaser, with banister brush or gauze carefully clean mould group carry out cleaning remove
Oil；
After oil removing, it is to clean up in 15 DEG C~25 DEG C water that mould group, which is immersed in temperature,.
6. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that preparation hanging coating
In, the density of the coating is 1.64~1.72.
7. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that hung to the mould group
Sand, comprising:
Mould group is continuously immersed in coating 2 times~3 times, to form superficial layer on the surface of mould group；
It is immersed in coating 1 time~2 times according to part shape, to form enhancement layer on the superficial layer.
8. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that done to the mould group
It is dry, comprising:
It is dry that nature, ventilation and ammonia are successively carried out to the mould group.
9. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that carry out electricity to the mould group
In heat dewaxing, dewaxing furnace temperature is 120 DEG C~140 DEG C, keeps the temperature 1.5h~3h.
10. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that carried out to the mould group
In roasting, it is put into no more than 500 DEG C roasters of temperature, heats up 3h~4h to 900 DEG C, and keep the temperature 2h~2.5h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811420752.8A CN109550899A (en) | 2018-11-27 | 2018-11-27 | Fusible pattern and counter-pressure casting combined shaping method |
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| CN201811420752.8A CN109550899A (en) | 2018-11-27 | 2018-11-27 | Fusible pattern and counter-pressure casting combined shaping method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110328351A (en) * | 2019-08-13 | 2019-10-15 | 西安西工大超晶科技发展有限责任公司 | A kind of anti-gravity pouring investment-casting exempts from the process of sodium silicate molding |
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