CN105081281A - Metal mold low-pressure casting process for cast-aluminum gearbox body of high-speed train - Google Patents
Metal mold low-pressure casting process for cast-aluminum gearbox body of high-speed train Download PDFInfo
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- CN105081281A CN105081281A CN201510534648.1A CN201510534648A CN105081281A CN 105081281 A CN105081281 A CN 105081281A CN 201510534648 A CN201510534648 A CN 201510534648A CN 105081281 A CN105081281 A CN 105081281A
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- 238000005266 casting Methods 0.000 title claims abstract description 179
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 25
- 239000002184 metal Substances 0.000 title claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 63
- 239000000956 alloy Substances 0.000 claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims abstract description 14
- 238000011084 recovery Methods 0.000 claims description 23
- 239000004411 aluminium Substances 0.000 claims description 22
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 22
- 238000002844 melting Methods 0.000 claims description 20
- 230000008018 melting Effects 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 18
- 239000003973 paint Substances 0.000 claims description 12
- 238000007689 inspection Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 8
- 238000005206 flow analysis Methods 0.000 claims description 8
- 238000005422 blasting Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 239000000047 product Substances 0.000 abstract 2
- 239000012467 final product Substances 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 238000007669 thermal treatment Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 9
- 238000003723 Smelting Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000010183 spectrum analysis Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 241000271559 Dromaiidae Species 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
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- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
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Abstract
The invention provides a metal mold low-pressure casting process for a cast-aluminum gearbox body of a high-speed train. The process comprises the following steps of S1, three-dimensional modeling; S2, determining of casting process parameters; S3, drawing of a cast blank three-dimensional drawing and determining of a final casting process scheme; S4, design of the modeling of a casting mold; S5, manufacturing of a metal mold low-pressure mold and an inner-cavity resin sand hot box mold; S6, pressing of inner-cavity sand cores, maze sand cores, oil return groove sand cores and oil baffle sand cores of a resin sand gearbox; S7, preheating of the whole molds; S8, adding of smelted casting alloy material into a low-pressure casting machine maintaining furnace; S9, mounting of the inner-cavity sand cores, the maze sand cores, the oil return groove sand cores and the oil baffle sand cores manufactured in S6 on a low-pressure casting machine; S10, product pouring according to the casting process parameters obtained through S2; and S11, obtaining of a final product after T6 thermal treatment on a product obtained in S10. The casting cast through the process is compact in structure, clear in contour, smooth in inner and outer surface, stable in mechanical property and good in size stability and uniformity.
Description
Technical field
The present invention relates to cast aluminium gear-box casting technology field, particularly relate to a kind of bullet train cast aluminium gear case body metal-mold low-pressure casting technique.
Background technology
Along with the high speed development of World Economics, the continuous deterioration of global energy, environmental problem, in the face of day by day serious traffic congestion, bullet train is fast with speed, carrying capacity large, low energy consumption, low emission, the trip vehicles that are popular, safety and comfort environmental protection obtain develop rapidly.China's high ferro all reaches advanced international standard in bullet train manufacture, the construction of high speed railway foundation facility and high-speed railway operation management etc.But as bullet train core component gear box height dependence on import, the Zoomlion such as German, Japanese is just firmly in occupation of Chinese market.According to relevant report, German old brand gear-box Fu Yite supplies the gear case body of Chinese high ferro EMUs vehicle, occurs a lot of faults such as crackle, oil impregnate, hot box continuously, and Chinese Railway parent company has required that vehicle manufacturers is suspended and used Fu Yite gear-box.The embarrassment that gear-box of stopping using will be replaced without suitable spare and accessory parts in time to Chinese bullet train EMUs Design and manufacture, bullet train generation and operation, existing train, so the production domesticization of Chinese gear box of high-speed train is extremely urgent.
Gear case body is the critical component ensureing bullet train continuous service, be high ferro machine driving core component, required precision be high, manufacture difficulty is large, bearing load is large, work under bad environment and train high-speed cruising time bear very complicated alternate stress.Alleviating light weight object to reach in recent years, successfully being adopted by gear case body the aluminium alloy of high strength to replace cast-iron alloy both at home and abroad.Domestic and international cast aluminium gear case body is all adopt core casting, and the shortcoming due to core casting technique mode itself governs the lifting of cast aluminium gear case body performance always.Particularly important and urgent in order to produce a kind of new aluminum alloy casting technique method of performance better cast aluminium gear case body research.
Summary of the invention
In order to solve the technical problem existed in background technology, the present invention proposes a kind of bullet train cast aluminium gear case body metal-mold low-pressure casting technique, casting cast structure densification out, clear-cut, surfaces externally and internally are bright and clean, stable mechanical performance, inner chamber oil-recovery tank, lubrication groove, labyrinth, oil baffle be shaped more clear, dimensionally stable uniformity is good, and the lightweight allowance of blank is few, and casting yield rate is high.
A kind of bullet train cast aluminium gear case body metal-mold low-pressure casting technique that the present invention proposes, comprises the steps:
S1, according to the three-dimensional modeling of S1 and in conjunction with metal-mold low-pressure casting technique determination casting technological parameter;
S3, the casting technological parameter drafting spray three-dimensional determined according to S2, the casting technological parameter according to spray three-dimensional and in conjunction with the determination of S2 carries out mold flow analysis, determines final casting process scheme and final casting blank three-dimensional;
S4, three-dimensional and in conjunction with metal-mold low-pressure casting die feature and device parameter according to the final casting process scheme of S3, final casting blank, the moulding of design casting mould;
S5, the casting mould moulding designed according to S4 manufacture metal mold low pressure mould and inner chamber resin sand hot core box mould;
S6, the hot box core mold compacting resin sand gear-box inner chamber core manufactured with S5, labyrinth core, oil-recovery tank core, oil baffle core, then fireproof coating in core surface brush;
S7, the metal mold low pressure mould completed by S5 carry out blasting treatment, are installed on low pressure casting board, then to whole mould and die preheating, and to mould molding position spray paint;
S8, according to metal-mold low-pressure casting technique, the cast alloy materials after melting is added in low pressure casting machine holding furnace;
S9, the inner chamber core produced by S6, labyrinth core, oil-recovery tank core, oil baffle core are arranged on air injection machine;
S10, according to the casting technological parameter of S2 cast product;
S11, according to the characteristic of cast alloy materials, T6 heat treatment is carried out to the product of S10 and obtain final products.
Preferably, in S2, technological parameter comprises alloy material chemical composition, running gate system, allowance and die joint.
Preferably, in S7, according to metal-mold low-pressure casting technique subregion to metal-mold low-pressure casting mould and die preheating, make mould from top to bottom temperature decline gradually, ensure that casting mould inlet temperature is 380 DEG C-400 DEG C, Die head temperatures is 300 DEG C-320 DEG C; Even spraying wanted by coating, makes paint thickness and heat insulating ability according to order from top to bottom from thick to thin, from strong to weak, the thickness of coating is 0.2-0.5mm.
Preferably, in S8, the absolute density adding the cast alloy materials in low pressure casting machine holding furnace is 2.63-2.67g/cm
2.
Preferably, further comprising the steps of:
S12, according to casting techniques require to the final products in S11 carry out dimension control, surface fluorescence flaw detection, significant points x-ray inspection.
Preferably, further comprising the steps of:
S13, deburring process and shotblasting are carried out to the product be up to the standards in S12.
Preferably, in S10, the temperature of product cast is at 720 DEG C-740 DEG C, and mold filling pressure is 0.025MP-0.035MP, and filling time is 15-20s, and dwell pressure is 0.05MP-0.07MP, dwell time 10-12min.
In the present invention, bullet train cast aluminium gear case body metal-mold low-pressure casting technique, passes through three-dimensional modeling, casting process scheme designs, mold flow analysis, mould three dimensional design, metal mold low pressure Making mold, manufacture core, manufacture metal and think low pressure mould, alloy melting is with reinforced, core is installed, low-pressure casting, the multiple working procedures such as heat treating castings, and design is optimized to each procedure technology parameter, adopt metal-mold low-pressure casting, cast liquation when making full use of low pressure casting and continue feeding from bottom to up in pressure effect, foundry goods is be all crystallization under stress from top to bottom in whole casting process, particularly casting mould is Metal mould casting is have resistance to shrink in process of setting, so the cast structure that metal-mold low-pressure casting is cast out is fine and close, clear-cut, surfaces externally and internally is bright and clean, stable mechanical performance, inner chamber oil-recovery tank, lubrication groove, labyrinth, it is more clear that oil baffle is shaped, and dimensionally stable uniformity is good, and the lightweight allowance of blank is few, and casting yield rate is high, and labour intensity is low, and working condition is good, and the consumption economize energy decreasing core decreases environmental pollution, particularly x-ray inspection, fluorescent penetrating inspection, air-tightness and finished surface pinhole rate grade are cast high than core.
Accompanying drawing explanation
Fig. 1 is the flow chart of a kind of bullet train cast aluminium gear case body metal-mold low-pressure casting technique that the present invention proposes.
Detailed description of the invention
With reference to Fig. 1, the present invention proposes a kind of bullet train cast aluminium gear case body metal-mold low-pressure casting technique, comprises the steps:
S1, utilize three-dimensional software to need casting gear box of high-speed train casing carry out three-dimensional modeling by technical requirement;
S2, according to the three-dimensional modeling of S1 and in conjunction with metal-mold low-pressure casting technique determination casting technological parameter: alloy material chemical composition, running gate system, allowance, die joint;
S3, to draw spray according to the casting technological parameter of the determination of S2 three-dimensional, use according to spray three-dimensional and in conjunction with the casting technological parameter of the determination of S2 mould stream software to carry out mold flow analysis, continue to optimize and determine final casting process scheme and final casting blank three-dimensional;
S4, three-dimensional and in conjunction with metal-mold low-pressure casting die feature and device parameter according to the final casting process scheme of S3, final casting blank, design casting mould graphics and Mould Machining X-Y scheme;
S5, the casting mould graphics designed according to S4 and X-Y scheme manufacture metal mold low pressure mould and inner chamber resin sand hot core box mould, metal mold low pressure mould in conjunction with foundry method features, must make the temperature field wall thickness being applicable to gradually changing according to the shape at shaping position;
S6, the hot box core mold compacting resin sand gear-box inner chamber core, labyrinth core, oil-recovery tank core, the oil baffle core that manufacture with S5, then all brush fireproof coating on inner chamber core, labyrinth core, oil-recovery tank core, oil baffle core surface, inner chamber core, labyrinth core, oil-recovery tank core, oil baffle core all must be come out of the stove use before IR oven 100 degree of bakings 1 hour cast;
S7, the metal mold low pressure mould completed by S5 carry out blasting treatment, be installed on low pressure casting board, according to metal-mold low-pressure casting technique subregion to metal-mold low-pressure casting mould and die preheating, make mould from top to bottom temperature decline gradually, ensure that casting mould inlet temperature is 380 DEG C-400 DEG C, Die head temperatures is 300 DEG C-320 DEG C; To mould molding position spray paint, even spraying wanted by coating, makes paint thickness and heat insulating ability according to order from top to bottom from thick to thin, from strong to weak, the thickness of coating is 0.2-0.5mm;
S8, according to metal-mold low-pressure casting technique, cast alloy materials qualified for melting is added low pressure casting machine holding furnace; During cast alloy materials melting, must carry out melting according to alloy material smelting technology used, after melting completes, spectrum analysis meets DINEN1706 standard regulation ENAC42200 chemical composition, and the absolute density of cast alloy materials is 2.63-2.67g/cm
2;
S9, the inner chamber core produced by S6, labyrinth core, oil-recovery tank core, oil baffle core are arranged on air injection machine;
S10, according to the casting technological parameter of S2 cast product, the temperature of product cast is at 720 DEG C DEG C-740 DEG C, mold filling pressure is 0.025MP-0.035MP, filling time is 15-20s, dwell pressure is 0.05MP-0.07MP, dwell time 10-12min, in actual production process, the parameter of mold filling pressure, dwell pressure, cool time need carry out designing and adjusting according to gear box of high-speed train box casting infrastructure product weight;
S11, according to the characteristic of cast alloy materials, T6 heat treatment is carried out to the product of S10 and obtain final products;
S12, according to casting techniques require to the final products in S11 carry out dimension control, surface fluorescence flaw detection, significant points x-ray inspection;
S13, deburring process and shotblasting are carried out to the product be up to the standards in S12.
Embodiment 1
The present embodiment proposes a kind of bullet train cast aluminium gear case body metal-mold low-pressure casting technique, comprises the steps:
S1, utilize three-dimensional software to need casting gear box of high-speed train casing carry out three-dimensional modeling by technical requirement;
S2, according to the three-dimensional modeling of S1 and in conjunction with metal-mold low-pressure casting technique determination casting technological parameter: alloy material chemical composition, running gate system, allowance, die joint;
S3, to draw spray according to the casting technological parameter of the determination of S2 three-dimensional, use according to spray three-dimensional and in conjunction with the casting technological parameter of the determination of S2 mould stream software to carry out mold flow analysis, continue to optimize and determine final casting process scheme and final casting blank three-dimensional;
S4, three-dimensional and in conjunction with metal-mold low-pressure casting die feature and device parameter according to the final casting process scheme of S3, final casting blank, design casting mould graphics and Mould Machining X-Y scheme;
S5, the casting mould graphics designed according to S4 and X-Y scheme manufacture metal mold low pressure mould and inner chamber resin sand hot core box mould, metal mold low pressure mould in conjunction with foundry method features, must make the temperature field wall thickness being applicable to gradually changing according to the shape at shaping position;
S6, the hot box core mold compacting resin sand gear-box inner chamber core, labyrinth core, oil-recovery tank core, the oil baffle core that manufacture with S5, then all brush fireproof coating on inner chamber core, labyrinth core, oil-recovery tank core, oil baffle core surface, inner chamber core, labyrinth core, oil-recovery tank core, oil baffle core all must be come out of the stove use before IR oven 100 degree of bakings 1 hour cast;
S7, the metal mold low pressure mould completed by S6 carry out blasting treatment, be installed on low pressure casting board, according to metal-mold low-pressure casting technique subregion to metal-mold low-pressure casting mould and die preheating, make mould from top to bottom temperature decline gradually, ensure that casting mould inlet temperature is 390 DEG C, Die head temperatures is 310 DEG C; To mould molding position spray paint, even spraying wanted by coating, makes paint thickness and heat insulating ability according to order from top to bottom from thick to thin, from strong to weak, the thickness of coating is 0.4mm;
S8, according to metal-mold low-pressure casting technique, cast alloy materials qualified for melting is added low pressure casting machine holding furnace; During cast alloy materials melting, must carry out melting according to alloy material smelting technology used, after melting completes, spectrum analysis meets DINEN1706 standard regulation ENAC42200 chemical composition, and the absolute density of cast alloy materials is 2.65g/cm
2;
S9, the inner chamber core produced by S6, labyrinth core, oil-recovery tank core, oil baffle core are arranged on air injection machine;
S10, according to the casting technological parameter of S2 cast product, the temperature of product cast is at 730 DEG C, mold filling pressure is 0.03MP, filling time is 18s, dwell pressure is 0.06MP, dwell time 11min, in actual production process, the parameter of mold filling pressure, dwell pressure, cool time need carry out designing and adjusting according to gear box of high-speed train box casting infrastructure product weight;
S11, according to the characteristic of cast alloy materials, T6 heat treatment is carried out to the product of S10 and obtain final products;
S12, according to casting techniques require to the final products in S11 carry out dimension control, surface fluorescence flaw detection, significant points x-ray inspection;
S13, deburring process and shotblasting are carried out to the product be up to the standards in S12.
Embodiment 2
The present embodiment proposes a kind of bullet train cast aluminium gear case body metal-mold low-pressure casting technique, comprises the steps:
S1, utilize three-dimensional software to need casting gear box of high-speed train casing carry out three-dimensional modeling by technical requirement;
S2, according to the three-dimensional modeling of S1 and in conjunction with metal-mold low-pressure casting technique determination casting technological parameter: alloy material chemical composition, running gate system, allowance, die joint;
S3, to draw spray according to the casting technological parameter of the determination of S2 three-dimensional, use according to spray three-dimensional and in conjunction with the casting technological parameter of the determination of S2 mould stream software to carry out mold flow analysis, continue to optimize and determine final casting process scheme and final casting blank three-dimensional;
S4, three-dimensional and in conjunction with metal-mold low-pressure casting die feature and device parameter according to the final casting process scheme of S3, final casting blank, design casting mould graphics and Mould Machining X-Y scheme;
S5, the casting mould graphics designed according to S4 and X-Y scheme manufacture metal mold low pressure mould and inner chamber resin sand hot core box mould, metal mold low pressure mould in conjunction with foundry method features, must make the temperature field wall thickness being applicable to gradually changing according to the shape at shaping position;
S6, the hot box core mold compacting resin sand gear-box inner chamber core, labyrinth core, oil-recovery tank core, the oil baffle core that manufacture with S5, then all brush fireproof coating on inner chamber core, labyrinth core, oil-recovery tank core, oil baffle core surface, inner chamber core, labyrinth core, oil-recovery tank core, oil baffle core all must be come out of the stove use before IR oven 100 degree of bakings 1 hour cast;
S7, the metal mold low pressure mould completed by S6 carry out blasting treatment, be installed on low pressure casting board, according to metal-mold low-pressure casting technique subregion to metal-mold low-pressure casting mould and die preheating, make mould from top to bottom temperature decline gradually, ensure that casting mould inlet temperature is 380 DEG C, Die head temperatures is 300 DEG C; To mould molding position spray paint, even spraying wanted by coating, makes paint thickness and heat insulating ability according to order from top to bottom from thick to thin, from strong to weak, the thickness of coating is 0.2mm;
S8, according to metal-mold low-pressure casting technique, cast alloy materials qualified for melting is added low pressure casting machine holding furnace; During cast alloy materials melting, must carry out melting according to alloy material smelting technology used, after melting completes, spectrum analysis meets DINEN1706 standard regulation ENAC42200 chemical composition, and the absolute density of cast alloy materials is 2.63g/cm
2;
S9, the inner chamber core produced by S6, labyrinth core, oil-recovery tank core, oil baffle core are arranged on air injection machine;
S10, according to the casting technological parameter of S2 cast product, the temperature of product cast is at 720 DEG C °, mold filling pressure is 0.025MP, filling time is 15s, dwell pressure is 0.05MP, dwell time 10min, in actual production process, the parameter of mold filling pressure, dwell pressure, cool time need carry out designing and adjusting according to gear box of high-speed train box casting infrastructure product weight;
S11, according to the characteristic of cast alloy materials, T6 heat treatment is carried out to the product of S10 and obtain final products;
S12, according to casting techniques require to the final products in S11 carry out dimension control, surface fluorescence flaw detection, significant points x-ray inspection;
S13, deburring process and shotblasting are carried out to the product be up to the standards in S12.
Embodiment 3
The present embodiment proposes a kind of bullet train cast aluminium gear case body metal-mold low-pressure casting technique, comprises the steps:
S1, utilize three-dimensional software to need casting gear box of high-speed train casing carry out three-dimensional modeling by technical requirement;
S2, according to the three-dimensional modeling of S1 and in conjunction with metal-mold low-pressure casting technique determination casting technological parameter: alloy material chemical composition, running gate system, allowance, die joint;
S3, to draw spray according to the casting technological parameter of the determination of S2 three-dimensional, use according to spray three-dimensional and in conjunction with the casting technological parameter of the determination of S2 mould stream software to carry out mold flow analysis, continue to optimize and determine final casting process scheme and final casting blank three-dimensional;
S4, three-dimensional and in conjunction with metal-mold low-pressure casting die feature and device parameter according to the final casting process scheme of S3, final casting blank, design casting mould graphics and Mould Machining X-Y scheme;
S5, the casting mould graphics designed according to S4 and X-Y scheme manufacture metal mold low pressure mould and inner chamber resin sand hot core box mould, metal mold low pressure mould in conjunction with foundry method features, must make the temperature field wall thickness being applicable to gradually changing according to the shape at shaping position;
S6, the hot box core mold compacting resin sand gear-box inner chamber core, labyrinth core, oil-recovery tank core, the oil baffle core that manufacture with S5, then all brush fireproof coating on inner chamber core, labyrinth core, oil-recovery tank core, oil baffle core surface, inner chamber core, labyrinth core, oil-recovery tank core, oil baffle core all must be come out of the stove use before IR oven 100 degree of bakings 1 hour cast;
S7, the metal mold low pressure mould completed by S6 carry out blasting treatment, be installed on low pressure casting board, according to metal-mold low-pressure casting technique subregion to metal-mold low-pressure casting mould and die preheating, make mould from top to bottom temperature decline gradually, ensure that casting mould inlet temperature is 400 DEG C, Die head temperatures is 320 DEG C; To mould molding position spray paint, even spraying wanted by coating, makes paint thickness and heat insulating ability according to order from top to bottom from thick to thin, from strong to weak, the thickness of coating is 0.5mm;
S8, according to metal-mold low-pressure casting technique, cast alloy materials qualified for melting is added low pressure casting machine holding furnace; During cast alloy materials melting, must carry out melting according to alloy material smelting technology used, after melting completes, spectrum analysis meets DINEN1706 standard regulation ENAC42200 chemical composition, and the absolute density of cast alloy materials is 2.67g/cm
2;
S9, the inner chamber core produced by S6, labyrinth core, oil-recovery tank core, oil baffle core are arranged on air injection machine;
S10, according to the casting technological parameter of S2 cast product, the temperature of product cast is at 740 DEG C, mold filling pressure is 0.035MP, filling time is 20s, dwell pressure is 0.07MP, dwell time 12min, in actual production process, the parameter of mold filling pressure, dwell pressure, cool time need carry out designing and adjusting according to gear box of high-speed train box casting infrastructure product weight;
S11, according to the characteristic of cast alloy materials, T6 heat treatment is carried out to the product of S10 and obtain final products;
S12, according to casting techniques require to the final products in S11 carry out dimension control, surface fluorescence flaw detection, significant points x-ray inspection;
S13, deburring process and shotblasting are carried out to the final products be up to the standards in S12.
A kind of bullet train cast aluminium gear case body metal-mold low-pressure casting technique that the present invention proposes, passes through three-dimensional modeling, casting process scheme designs, mold flow analysis, mould three dimensional design, metal mold low pressure Making mold, manufacture core, manufacture metal and think low pressure mould, alloy melting is with reinforced, core is installed, low-pressure casting, the multiple working procedures such as heat treating castings, and design is optimized to each procedure technology parameter, adopt metal-mold low-pressure casting, cast liquation when making full use of low pressure casting and continue feeding from bottom to up in pressure effect, foundry goods is be all crystallization under stress from top to bottom in whole casting process, particularly casting mould is Metal mould casting is have resistance to shrink in process of setting, so the cast structure that metal-mold low-pressure casting is cast out is fine and close, clear-cut, surfaces externally and internally is bright and clean, stable mechanical performance, inner chamber oil-recovery tank, lubrication groove, labyrinth, it is more clear that oil baffle is shaped, and dimensionally stable uniformity is good, and the lightweight allowance of blank is few, and casting yield rate is high, and labour intensity is low, and working condition is good, and the consumption economize energy decreasing core decreases environmental pollution, particularly x-ray inspection, fluorescent penetrating inspection, air-tightness and finished surface pinhole rate grade are cast high than core.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (7)
1. a bullet train cast aluminium gear case body metal-mold low-pressure casting technique, is characterized in that, comprise the steps:
S1, to need casting gear case body carry out three-dimensional modeling;
S2, according to the three-dimensional modeling of S1 and in conjunction with metal-mold low-pressure casting technique determination casting technological parameter;
S3, the casting technological parameter drafting spray three-dimensional determined according to S2, the casting technological parameter according to spray three-dimensional and in conjunction with the determination of S2 carries out mold flow analysis, determines final casting process scheme and final casting blank three-dimensional;
S4, three-dimensional and in conjunction with metal-mold low-pressure casting die feature and device parameter according to the final casting process scheme of S3, final casting blank, the moulding of design casting mould;
S5, the casting mould moulding designed according to S4 manufacture metal mold low pressure mould and inner chamber resin sand hot core box mould;
S6, the hot box core mold compacting resin sand gear-box inner chamber core manufactured with S5, labyrinth core, oil-recovery tank core, oil baffle core, then fireproof coating in core surface brush, baking;
S7, the metal mold low pressure mould completed by S5 carry out blasting treatment, are installed on low pressure casting board, then to whole mould and die preheating, and to mould molding position spray paint;
S8, according to metal-mold low-pressure casting technique, the cast alloy materials after melting is added in low pressure casting machine holding furnace;
S9, the inner chamber core produced by S6, labyrinth core, oil-recovery tank core, oil baffle core are arranged on air injection machine;
S10, according to the casting technological parameter of S2 cast product;
S11, according to the characteristic of cast alloy materials, T6 heat treatment is carried out to the product of S10 and obtain final products.
2. bullet train cast aluminium gear case body metal-mold low-pressure casting technique according to claim 1, it is characterized in that, in S2, technological parameter comprises alloy material chemical composition, running gate system, allowance and die joint.
3. bullet train cast aluminium gear case body metal-mold low-pressure casting technique according to claim 1, it is characterized in that, in S7, according to metal-mold low-pressure casting technique subregion to metal-mold low-pressure casting mould and die preheating, make mould from top to bottom temperature decline gradually, ensure that casting mould inlet temperature is 380 DEG C-400 DEG C, Die head temperatures is 300 DEG C-320 DEG C; Even spraying wanted by coating, makes paint thickness and heat insulating ability according to order from top to bottom from thick to thin, from strong to weak, the thickness of coating is 0.2-0.5mm.
4. bullet train cast aluminium gear case body metal-mold low-pressure casting technique according to claim 1, is characterized in that, in S8, the absolute density adding the cast alloy materials in low pressure casting machine holding furnace is 2.63-2.67g/cm
2.
5. the bullet train cast aluminium gear case body metal-mold low-pressure casting technique according to any one of claim 1-4, is characterized in that, further comprising the steps of:
S12, according to casting techniques require to the final products in S11 carry out dimension control, surface fluorescence flaw detection, significant points x-ray inspection.
6. bullet train cast aluminium gear case body metal-mold low-pressure casting technique according to claim 5, is characterized in that, further comprising the steps of:
S13, deburring process and shotblasting are carried out to the final products be up to the standards in S12.
7. the bullet train cast aluminium gear case body metal-mold low-pressure casting technique according to any one of claim 1-4, it is characterized in that, in S10, the temperature of product cast is at 720 DEG C DEG C-740 DEG C, mold filling pressure is 0.025MP-0.035MP, filling time is 15-20s, and dwell pressure is 0.05MP-0.07MP, dwell time 10-12min.
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| CN106925757A (en) * | 2017-04-26 | 2017-07-07 | 宁夏维尔铸造有限责任公司 | Aluminum alloy gear casing casting casting system and casting method |
| CN109079122A (en) * | 2018-10-18 | 2018-12-25 | 四川省犍为恒益铝业有限公司 | A kind of casting technique of improved vehicle cabinet |
| CN109622920A (en) * | 2018-11-30 | 2019-04-16 | 江苏文灿压铸有限公司 | The pouring technology of low-pressure casting gas fuel valve remote controllers gear housing |
| CN110732655A (en) * | 2019-11-15 | 2020-01-31 | 西安西电开关电气有限公司 | Aluminum alloy casting forming mold and forming process |
| CN112906187A (en) * | 2021-01-16 | 2021-06-04 | 大连环友屏蔽泵有限公司 | Casting process of double-suction pump body |
| CN112893782A (en) * | 2021-01-20 | 2021-06-04 | 湖北长鑫源汽车实业有限公司 | Flywheel housing processing technology |
| CN113857460A (en) * | 2021-09-28 | 2021-12-31 | 济南方德利模具有限公司 | Large oil pan low-pressure casting die, device and process |
| CN118950948A (en) * | 2024-08-06 | 2024-11-15 | 阿路米（无锡）有限公司 | A Molding Process for Complex Hydraulic Pump Cavity |
| CN120480138A (en) * | 2025-07-18 | 2025-08-15 | 泉州市华茂机械设备有限公司 | Gear ring casting process |
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| CN106925757A (en) * | 2017-04-26 | 2017-07-07 | 宁夏维尔铸造有限责任公司 | Aluminum alloy gear casing casting casting system and casting method |
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| CN109622920A (en) * | 2018-11-30 | 2019-04-16 | 江苏文灿压铸有限公司 | The pouring technology of low-pressure casting gas fuel valve remote controllers gear housing |
| CN110732655A (en) * | 2019-11-15 | 2020-01-31 | 西安西电开关电气有限公司 | Aluminum alloy casting forming mold and forming process |
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