CN102728790A - Sand-line iron mould casting process for grey cast iron flywheel housing of diesel engine - Google Patents
Sand-line iron mould casting process for grey cast iron flywheel housing of diesel engine Download PDFInfo
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- CN102728790A CN102728790A CN2012102559641A CN201210255964A CN102728790A CN 102728790 A CN102728790 A CN 102728790A CN 2012102559641 A CN2012102559641 A CN 2012102559641A CN 201210255964 A CN201210255964 A CN 201210255964A CN 102728790 A CN102728790 A CN 102728790A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 77
- 238000005266 casting Methods 0.000 title claims abstract description 49
- 229910001060 Gray iron Inorganic materials 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000004576 sand Substances 0.000 claims description 78
- 238000005507 spraying Methods 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 20
- 238000000465 moulding Methods 0.000 claims description 20
- 238000007528 sand casting Methods 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 15
- 238000007711 solidification Methods 0.000 claims description 12
- 230000008023 solidification Effects 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 5
- 238000011534 incubation Methods 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract 1
- 230000003746 surface roughness Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000009749 continuous casting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000005087 graphitization Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a sand-line iron mould casting process for grey cast iron flywheel housings of diesel engines. In the invention, upper and lower sand-line iron mould processes are used, so that produced grey cast iron flywheel housing blanks have favorable geometric size precision which can be up to CT8 grade, favorable surface roughness which can be up to 12.5 microns and favorable mechanical properties, the blank processing has small allowance which can be controlled in 3mm, small flashing distortion which can be controlled in 0.5mm and small cleaning workload, so that the labor environment is improved, the environmental protection is improved, the yield is high and can be up to 95%, and the national policies of energy conservation, environmental protection and sustainable development are met.
Description
Technical field
The present invention relates to a kind of casting technique, is a kind of diesel engine grey cast-iron bell housing Iron Mould Coated Sand casting technique specifically, and foundry goods has good geometric accuracy and surface quality, and blank allowance is little, good mechanical property.
Background technology
Bell housing is one of critical piece of diesel engine, the bell housing that particularly the present invention relates to supporting diesel engine belong to recently from the high-end diesel engine of the high-power of external introduction, load is big, and is complex-shaped, dimensional accuracy is high.Be the product that bell housing and gear chamber case unite two into one, must do hydrostatic test after the inherent machined of gear chamber is good, pressure 0.6MPa, pressurize must not have drainage in 5 minutes, and quality requirement is than higher.
The conventional cast technology of gray iron bell housing mainly adopts sand casting to comprise resin sand, tide mould sand moulding.The traditional handicraft process is following: adopt the tide mould sand moulding, comprise moulding by hand or machine molding or high pressure moulding after, form casting mold and adopt resin sand coremaking, play core, mould assembling, cast, cleaning then.The mold stiffness difference made from above-mentioned casting technique thereby surface quality of continuous castings is poor, the allowance of poor dimensional precision, blank is big, wall unevenness even, material is unstable, water leakage ratio is high and technological operation property is poor, the worker laboring environment is poor, occupied ground is big.
Summary of the invention
In order to solve the deficiency of conventional art, the invention provides a kind of diesel engine grey cast-iron bell housing Iron Mould Coated Sand casting technique, its surface quality of continuous castings is good, dimensional accuracy is high, reduce blank allowance, reduce the foundry goods scrappage, has good mechanical properties.
Above-mentioned purpose of the present invention realizes through following technical scheme: a kind of diesel engine grey cast-iron bell housing Iron Mould Coated Sand casting technique: comprise that step is following:
(1) swage and Mold Making: make upper and lower mould according to the bell housing casting dimension, leave by upper and lower die size and cover the upper and lower swage of sand chamber respective production, on last swage, casting system is set;
(2) upper and lower making molds:
(2a) will go up swage and mold, following swage and bed die and cover mould assembly preheating respectively on the sand machine; After the preheating, separately swage and mould spray releasing agent, mould assembly again at upper and lower mould outer wall;
(2b) many sand-spraying holes on upper and lower swage will be gone up swage and mold, descend covering between swage and bed die to be full of precoated sand through compressed air in the sand chamber;
(2c) on every sand-spraying hole, prick a core, penetrate precoated sand 50-80mm; Core diameter 2-5mm;
(2d) precoated sand curing molding on upper and lower swage, solidification temperature 240-280 ℃, 30-40 second hardening time;
(2e) molding separately hangs upper and lower mould with upper and lower swage;
(3) the mud core is made:
(3a) make mud core core box according to the bell housing casting dimension, releasing agent is sprayed in the core box preheating;
(3b) core box on core shooter with pressurized air impinges system bell housing mud core;
(3c) wait to solidify the back molding, solidification temperature 240-280 ℃, 30-40 second hardening time;
(4) core, mould assembling down:
(4a) bell housing mud core is located on the precoated sand in following swage by core under the bell housing casting dimension; (4b) the horizontal mould assembling of upper and lower swage adopts alignment pin and guide finger to be seated upper and lower swage;
(4c) sled top box card on the case ear of upper and lower swage is installed junner bush on last swage casting system top;
(5) raw material melting:
(5a) carry out melting in the middle frequency furnace with grey iron material input 1T, obtain original iron melt A after the mode of employing adding steel scrap, ferrosilicon, carburant is adjusted chemical composition in intermediate frequency furnace;
(5b) step original iron melt A is added inovulant in pouring ladle into the time and carries out inoculated, skim iron liquid B;
(6) raw material cast: the iron liquid B of step (5b) poured in the casting mold that core step (4) play, mould assembling step obtain through junner bush cast, junner bush completely stops to cast;
(7) shake out:
(7a) the cast back was destroyed junner bush in 2-3 minute and down gate iron liquid is all around cleaned out,
(7b) the case card was unclamped in 6-8 minute in the cast back, hung swage, took out foundry goods.
Further; Said step 1. casting system is made up of sprue, cross gate and ingate; Sprue vertically is arranged at and is communicated with the swage outside on the swage; Bearing of trend is arranged at the interior sprue bottom that is communicated with of iron shape to cross gate along last swage cross section, and bearing of trend is communicated with cross gate and covers the sand chamber multiple tracks ingate along last swage cross section, and the sectional area ratio of each running channel is: A is straight: the A horizontal stroke: in the A=and 11.3cm
2: 8.4cm
2: 4.8cm
2=1:0.75:0.43.
Further, 240-280 ℃ of said step (2a) swage preheat temperature, mold preheating temperature 240-280 ℃.
Further, every sand-spraying hole 16mm of said step (2b) penetrates sand compressed air pressure 0.4-0.6MPa, and covering sand thickness is 8-10mm.
Further, 220-260 ℃ of said step (3a) core box preheat temperature, temperature retention time 4 minutes.
Further; Said step (5a) gray iron raw material comprises new iron 80% and steel scrap 20%, and smelting temperature 1510-1530 ℃, step (5a) is adjusted chemical composition C, Si in intermediate frequency furnace; Its original iron melt A composition: W (C): 3.4-3.5%; W (Si): 1.4-1.6%, wherein the content of carbon is controlled through adding steel scrap or carburant, and the content of silicon is controlled through adding 75SiFe.
Further, the inovulant that said step (5b) adds is 75SiFe, and granularity is 5-8mm; Addition is the 0.3-0.5% of original iron melt A quality, incubation time 30-50 second, iron liquid B composition W (C): 3.4-3.5%; W (Si): 1.7-1.9%; W (Mn): 0.7-0.8%, 0＜W (P)≤0.1%, 0＜W (S)≤0.1%.Again further, said step (6) is cast temperature 1350-1400 ℃.
The theoretical foundation of casting technique of the present invention is that molten steel solidification is theoretical, and the molten steel solidification theory is volume contraction but the time according to the iron liquid cooling, indigenous graphite when solidifying.The fact of volumetric expansion, the expansive force that high trade mark gray iron produces is bigger, if the mold stiffness difference certainly will cause the mould wall migration to cause die cavity to increase, causes the foundry goods sand foundry goods physical dimension that rises to change scab, thick large part shrinkage porosite phenomenon.Adopt the casting mold sand-covering technique to compare with sand casting, the present invention has following remarkable advantage:
⑴ the present invention adopts Iron Mould Coated Sand technology, and mold stiffness is good, and die cavity can not be subjected to displacement when molten iron generation graphitization expansion; Thereby stopped the sand phenomenon that rises of foundry goods, the foundry goods geometric accuracy is high, and the dimensional uniformity of foundry goods is good; Allowance can suitably reduce, and helps reducing manufacturing cost;
⑵ mud core of the present invention adopts hot box to make, and mud core pattern chamber surface quality is good, and final casting does not have burr, little, the dislocation-free of burr, can significantly reduce the cleaning work amount;
⑶ the present invention adopts upper and lower swage casting, cooperates mud core and band core precoated sand to form the cast chamber, and the foundry goods cooling velocity is faster than common sand casting, and castings material is stable, mechanical property is good;
⑷ the present invention adopts Iron Mould Coated Sand technology, makes sand using amount little, and environmental pollution is much littler than common sand casting, and working strength of workers and working environment are improved.
⑸ after adopt iron liquid of the present invention to breed, promote iron liquid graphitization, improve the combination property of molten iron, avoid spoken parts in traditional operas to produce.
The present invention adopts Iron Mould Coated Sand explained hereafter gray iron bell housing blank, has good geometric accuracy, can reach the CT8 level, the surface of good roughness; Can reach 12.5 μ m, the favorable mechanical performance, stable material quality reaches HT250, and blank allowance is little; Can be controlled in 3mm, the burr dislocation is little, can be controlled within the 0.5mm; The casting cleaning workload is little, and it is strong to reduce work, improves environmental pollution; Casting yield is high, reaches 95%, meets energy-saving and environmental protection, sustainable development policy that country advocates.
The specific embodiment
Fig. 1 is a casting structure sketch map of the present invention;
Fig. 2 is Iron Mould Coated Sand structural representation in the present invention;
Fig. 3 is Iron Mould Coated Sand structural representation under the present invention;
Fig. 4 is a cast structure sketch map of the present invention.
Among the figure: bell housing foundry goods 1, last swage 2, following swage 201, mold 3, bed die 301, sand-spraying hole 4,401 covers layer of sand 5,501, core 6,601, running channel mould 7, sprue 701, cross gate 702, ingate 703, mud core 8.
The specific embodiment
Shown in Figure 1 is the cross section structure sketch map of diesel engine gray iron bell housing foundry goods 1.
Shown in Figure 2; A kind of last Iron Mould Coated Sand structural representation of Iron Mould Coated Sand casting technique of diesel engine gray iron bell housing comprises swage 2, running channel mould 7 and mold 3, and the surface texture of mold is identical with the upper face structure of bell housing foundry goods; Mould assembly leaves and covers the sand chamber between last swage and the mold; Be provided with the running channel mould in the last swage, leave equally between last swage and running channel mould and cover the sand chamber, last swage is provided with a plurality of sand-spraying holes 4 that cover the sand chamber that are communicated to; Many sand-spraying holes on last swage will be gone up covering in the sand chamber between swage and mold and be full of precoated sand through compressed air and form and cover layer of sand 5, prick a core 6 from every sand-spraying hole and penetrate and cover layer of sand.
Shown in Figure 3; A kind of following Iron Mould Coated Sand structural representation of Iron Mould Coated Sand casting technique of diesel engine gray iron bell housing; Comprise swage 201 and bed die 301 down; The surface texture of bed die is identical with the bottom surface structure of bell housing foundry goods, and mould assembly leaves and covers the sand chamber between following swage and the bed die, and following swage is provided with a plurality of sand-spraying holes 401 that cover the sand chamber that are communicated to; Many sand-spraying holes on following swage will descend covering between swage and bed die to be full of precoated sand through compressed air to form and cover layer of sand 501, penetrate from every sand-spraying hole bundle one core 601 and cover layer of sand in sand the chamber in.
Shown in Figure 4, cast structure sketch map of the present invention is positioned over down the mud core of making 8 on the swage, has the upper and lower swage mould assembly that covers layer of sand.Wherein casting system is made up of sprue 701, cross gate 702 and ingate 703; Sprue vertically is arranged at and is communicated with the swage outside on the swage; Bearing of trend is arranged at connection sprue bottom in the iron shape to cross gate along last swage cross section; Bearing of trend is communicated with cross gate and covers the sand chamber multiple tracks ingate along last swage cross section, and the sectional area ratio of each running channel is: A is straight: A is horizontal: in the A=and 11.3cm
2: 8.4cm
2: 4.8cm
2=1:0.75:0.43.
Embodiment one; Casting technique of the present invention comprises that step is following:
(1) swage and Mold Making: make upper and lower mould according to the bell housing casting dimension, leave by upper and lower die size and cover the upper and lower swage of sand chamber respective production, casting system and many sand-spraying holes are set on last swage, on the swage many sand-spraying holes are being set down;
(2) upper and lower making molds:
(2a) swage and mold, following swage and bed die be will go up and mould assembly preheating respectively on the sand machine, 240 ℃ of swage preheat temperatures, 240 ℃ of mold preheating temperatures covered; After the preheating, separately swage and mould spray releasing agent, mould assembly again at upper and lower mould outer wall;
(2b) many sand-spraying holes on upper and lower swage will be gone up swage and mold, descend covering between swage and bed die to be full of precoated sand through compressed air in the sand chamber, and every sand-spraying hole 16mm penetrates sand compressed air pressure 0.4MPa, and covering sand thickness is 8mm;
(2c) on every sand-spraying hole, prick a core, penetrate precoated sand 50mm; Core diameter 2mm;
(2d) precoated sand curing molding on upper and lower swage, 240 ℃ of solidification temperatures, 30 seconds hardening times;
(2e) molding separately hangs upper and lower mould with upper and lower swage;
(3) the mud core is made:
(3a) make mud core core box according to the bell housing casting dimension, the core box preheating, 220 ℃ of core box preheat temperatures, temperature retention time 4 minutes is sprayed releasing agent;
(3b) core box on core shooter with pressurized air impinges system bell housing mud core;
(3c) wait to solidify back molding, 240 ℃ of solidification temperatures, 30 seconds hardening times;
(4) core, mould assembling down:
(4a) bell housing mud core is located on the precoated sand in following swage by core under the bell housing casting dimension; (4b) the horizontal mould assembling of upper and lower swage adopts alignment pin and guide finger to be seated upper and lower swage;
(4c) sled top box card on the case ear of upper and lower swage is installed junner bush on last swage casting system top;
(5) raw material melting:
(5a) carry out melting in the middle frequency furnace with grey iron material input 1T; Obtain original iron melt A after in intermediate frequency furnace, adopting the mode that adds steel scrap, ferrosilicon, carburant to adjust chemical composition; The gray iron raw material comprises new iron 80% and steel scrap 20%, 1510 ℃ of smelting temperatures, and step (5a) is adjusted chemical composition C, Si in intermediate frequency furnace; Its original iron melt A composition: W (C): 3.4-3.5%; W (Si): 1.4-1.6%, wherein the content of carbon is controlled through adding steel scrap or carburant, and the content of silicon is controlled through adding 75SiFe;
(5b) step original iron melt A is added inovulant in pouring ladle into the time and carries out inoculated, skim iron liquid B, the inovulant of adding is 75SiFe; Granularity is 5-8mm, and addition is the 0.3-0.5% of original iron melt A quality, 30 seconds incubation times; Iron liquid B composition W (C): 3.4-3.5%, W (Si): 1.7-1.9%, W (Mn): 0.7-0.8%; 0＜W (P)≤0.1%, 0＜W (S)≤0.1%;
(6) raw material cast: the iron liquid B of step (5b) poured in the casting mold that core step (4) play, mould assembling step obtain through junner bush cast, 1350 ℃ of cast temperatures, junner bush completely stop to cast;
(7) shake out:
(7a) cast was destroyed junner bush in back 2 minutes and down gate iron liquid is all around cleaned out,
(7b) cast is unclamped the case card in back 6 minutes, hangs swage, takes out foundry goods.
Embodiment two; Casting technique of the present invention comprises that step is following:
(1) swage and Mold Making: make upper and lower mould according to the bell housing casting dimension, leave by upper and lower die size and cover the upper and lower swage of sand chamber respective production, casting system and many sand-spraying holes are set on last swage, on the swage many sand-spraying holes are being set down;
(2) upper and lower making molds:
(2a) swage and mold, following swage and bed die be will go up and mould assembly preheating respectively on the sand machine, 260 ℃ of swage preheat temperatures, 260 ℃ of mold preheating temperatures covered; After the preheating, separately swage and mould spray releasing agent, mould assembly again at upper and lower mould outer wall;
(2b) many sand-spraying holes on upper and lower swage will be gone up swage and mold, descend covering between swage and bed die to be full of precoated sand through compressed air in the sand chamber, and every sand-spraying hole 16mm penetrates sand compressed air pressure 0.5MPa, and covering sand thickness is 9mm;
(2c) on every sand-spraying hole, prick a core, penetrate precoated sand 70mm; Core diameter 4mm;
(2d) precoated sand curing molding on upper and lower swage, 260 ℃ of solidification temperatures, 35 seconds hardening times;
(2e) molding separately hangs upper and lower mould with upper and lower swage;
(3) the mud core is made:
(3a) make mud core core box according to the bell housing casting dimension, the core box preheating, 240 ℃ of core box preheat temperatures, temperature retention time 4 minutes is sprayed releasing agent;
(3b) core box on core shooter with pressurized air impinges system bell housing mud core;
(3c) wait to solidify back molding, 260 ℃ of solidification temperatures, 35 seconds hardening times;
(4) core, mould assembling down:
(4a) bell housing mud core is located on the precoated sand in following swage by core under the bell housing casting dimension; (4b) the horizontal mould assembling of upper and lower swage adopts alignment pin and guide finger to be seated upper and lower swage;
(4c) sled top box card on the case ear of upper and lower swage is installed junner bush on last swage casting system top;
(5) raw material melting:
(5a) carry out melting in the middle frequency furnace with grey iron material input 1T; Obtain original iron melt A after in intermediate frequency furnace, adopting the mode that adds steel scrap, ferrosilicon, carburant to adjust chemical composition; The gray iron raw material comprises new iron 80% and steel scrap 20%, 1520 ℃ of smelting temperatures, and step (5a) is adjusted chemical composition C, Si in intermediate frequency furnace; Its original iron melt A composition: W (C): 3.4-3.5%; W (Si): 1.4-1.6%, wherein the content of carbon is controlled through adding steel scrap or carburant, and the content of silicon is controlled through adding 75SiFe;
(5b) step original iron melt A is added inovulant in pouring ladle into the time and carries out inoculated, skim iron liquid B, the inovulant of adding is 75SiFe; Granularity is 5-8mm, and addition is the 0.3-0.5% of original iron melt A quality, 40 seconds incubation times; Iron liquid B composition W (C): 3.4-3.5%, W (Si): 1.7-1.9%, W (Mn): 0.7-0.8%; 0＜W (P)≤0.1%, 0＜W (S)≤0.1%;
(6) raw material cast: the iron liquid B of step (5b) poured in the casting mold that core step (4) play, mould assembling step obtain through junner bush cast, 1380 ℃ of cast temperatures, junner bush completely stop to cast;
(7) shake out:
(7a) cast was destroyed junner bush in back 2.5 minutes and down gate iron liquid is all around cleaned out,
(7b) cast is unclamped the case card in back 7 minutes, hangs swage, takes out foundry goods.
Embodiment three; Casting technique of the present invention comprises that step is following:
(1) swage and Mold Making: make upper and lower mould according to the bell housing casting dimension, leave by upper and lower die size and cover the upper and lower swage of sand chamber respective production, casting system and many sand-spraying holes are set on last swage, on the swage many sand-spraying holes are being set down;
(2) upper and lower making molds:
(2a) swage and mold, following swage and bed die be will go up and mould assembly preheating respectively on the sand machine, 280 ℃ of swage preheat temperatures, 280 ℃ of mold preheating temperatures covered; After the preheating, separately swage and mould spray releasing agent, mould assembly again at upper and lower mould outer wall;
(2b) many sand-spraying holes on upper and lower swage will be gone up swage and mold, descend covering between swage and bed die to be full of precoated sand through compressed air in the sand chamber, and every sand-spraying hole 16mm penetrates sand compressed air pressure 0.6MPa, and covering sand thickness is 10mm;
(2c) on every sand-spraying hole, prick a core, penetrate precoated sand 80mm; Core diameter 5mm;
(2d) precoated sand curing molding on upper and lower swage, 280 ℃ of solidification temperatures, 40 seconds hardening times;
(2e) molding separately hangs upper and lower mould with upper and lower swage;
(3) the mud core is made:
(3a) make mud core core box according to the bell housing casting dimension, the core box preheating, 260 ℃ of core box preheat temperatures, temperature retention time 4 minutes is sprayed releasing agent;
(3b) core box on core shooter with pressurized air impinges system bell housing mud core;
(3c) wait to solidify back molding, 280 ℃ of solidification temperatures, 40 seconds hardening times;
(4) core, mould assembling down:
(4a) bell housing mud core is located on the precoated sand in following swage by core under the bell housing casting dimension; (4b) the horizontal mould assembling of upper and lower swage adopts alignment pin and guide finger to be seated upper and lower swage;
(4c) sled top box card on the case ear of upper and lower swage is installed junner bush on last swage casting system top;
(5) raw material melting:
(5a) carry out melting in the middle frequency furnace with grey iron material input 1T; Obtain original iron melt A after in intermediate frequency furnace, adopting the mode that adds steel scrap, ferrosilicon, carburant to adjust chemical composition; The gray iron raw material comprises new iron 80% and steel scrap 20%, 1530 ℃ of smelting temperatures, and step (5a) is adjusted chemical composition C, Si in intermediate frequency furnace; Its original iron melt A composition: W (C): 3.4-3.5%; W (Si): 1.4-1.6%, wherein the content of carbon is controlled through adding steel scrap or carburant, and the content of silicon is controlled through adding 75SiFe;
(5b) step original iron melt A is added inovulant in pouring ladle into the time and carries out inoculated, skim iron liquid B, the inovulant of adding is 75SiFe; Granularity is 5-8mm, and addition is the 0.3-0.5% of original iron melt A quality, 50 seconds incubation times; Iron liquid B composition W (C): 3.4-3.5%, W (Si): 1.7-1.9%, W (Mn): 0.7-0.8%; 0＜W (P)≤0.1%, 0＜W (S)≤0.1%;
(6) raw material cast: the iron liquid B of step (5b) poured in the casting mold that core step (4) play, mould assembling step obtain through junner bush cast, 1400 ℃ of cast temperatures, junner bush completely stop to cast;
(7) shake out:
(7a) cast was destroyed junner bush in back 3 minutes and down gate iron liquid is all around cleaned out,
(7b) cast is unclamped the case card in back 8 minutes, hangs swage, takes out foundry goods.
Claims (8)
1. diesel engine grey cast-iron bell housing Iron Mould Coated Sand casting technique is characterized in that: comprise that step is following:
(1) swage and Mold Making: make upper and lower mould according to the bell housing casting dimension, leave by upper and lower die size and cover the upper and lower swage of sand chamber respective production, on last swage, casting system is set;
(2) upper and lower making molds:
(2a) will go up swage and mold, following swage and bed die and cover mould assembly preheating respectively on the sand machine; After the preheating, separately swage and mould spray releasing agent, mould assembly again at upper and lower mould outer wall;
(2b) many sand-spraying holes on upper and lower swage will be gone up swage and mold, descend covering between swage and bed die to be full of precoated sand through compressed air in the sand chamber;
(2c) on every sand-spraying hole, prick a core, penetrate precoated sand 50-80mm, core diameter 2-5mm;
(2d) precoated sand curing molding on upper and lower swage, solidification temperature 240-280 ℃, 30-40 second hardening time;
(2e) molding separately hangs upper and lower mould with upper and lower swage;
(3) the mud core is made:
(3a) make mud core core box according to the bell housing casting dimension, releasing agent is sprayed in the core box preheating;
(3b) core box on core shooter with pressurized air impinges system bell housing mud core;
(3c) wait to solidify the back molding, solidification temperature 240-280 ℃, 30-40 second hardening time;
(4) core, mould assembling down:
(4a) bell housing mud core is located on the precoated sand in following swage by core under the bell housing casting dimension; (4b) the horizontal mould assembling of upper and lower swage adopts alignment pin and guide finger to be seated upper and lower swage;
(4c) sled top box card on the case ear of upper and lower swage is installed junner bush on last swage casting system top;
(5) raw material melting:
(5a) carry out melting in the middle frequency furnace with grey iron material input 1T, obtain original iron melt A after the mode of employing adding steel scrap, ferrosilicon, carburant is adjusted chemical composition in intermediate frequency furnace;
(5b) original iron melt A is added inovulant in pouring ladle into the time and carries out inoculated, skim iron liquid B;
(6) raw material cast: the iron liquid B of step (5b) poured in the casting mold that core step (4) play, mould assembling step obtain through junner bush cast, junner bush completely stops to cast;
(7) shake out:
(7a) the cast back was destroyed junner bush in 2-3 minute and casting system mouth iron liquid is all around cleaned out;
(7b) the case card was unclamped in 6-8 minute in the cast back, hung swage, took out foundry goods.
2. a kind of diesel engine grey cast-iron bell housing Iron Mould Coated Sand casting technique according to claim 1; It is characterized in that: said step (1) casting system is made up of sprue, cross gate and ingate; Sprue vertically is arranged at and is communicated with the swage outside on the swage; Bearing of trend is arranged at connection sprue bottom in the iron shape to cross gate along last swage cross section; Bearing of trend is provided with the connection cross gate and covers the sand chamber multiple tracks ingate along last swage cross section, and the sectional area ratio of each running channel is: A is straight: A is horizontal: in the A=and 11.3cm
2: 8.4cm
2: 4.8cm
2=1:0.75:0.43.
3. a kind of diesel engine grey cast-iron bell housing Iron Mould Coated Sand casting technique according to claim 1 is characterized in that: 240-280 ℃ of said step (2a) swage preheat temperature, mold preheating temperature 240-280 ℃.
4. a kind of diesel engine grey cast-iron bell housing Iron Mould Coated Sand casting technique according to claim 1 is characterized in that: every sand-spraying hole of said step (2b), penetrate sand compressed air pressure 0.4-0.6MPa, and covering sand thickness is 8-10mm.
5. a kind of diesel engine grey cast-iron bell housing Iron Mould Coated Sand casting technique according to claim 1 is characterized in that: 220-260 ℃ of said step (3a) core box preheat temperature, temperature retention time 4 minutes.
6. a kind of diesel engine grey cast-iron bell housing Iron Mould Coated Sand casting technique according to claim 1; It is characterized in that: said step (5a) gray iron raw material comprises new iron 80% and steel scrap 20%, and smelting temperature 1510-1530 ℃, step (5a) is adjusted chemical composition C, Si in intermediate frequency furnace; Its original iron melt A composition: W (C): 3.4-3.5%; W (Si): 1.4-1.6%, wherein the content of carbon is controlled through adding steel scrap or carburant, and the content of silicon is controlled through adding ferrosilicon.
7. a kind of diesel engine grey cast-iron bell housing Iron Mould Coated Sand casting technique according to claim 1 is characterized in that: the inovulant that said step (5b) adds is a ferrosilicon, and granularity is 5-8mm; Addition is the 0.3-0.5% of original iron melt A quality, incubation time 30-50 second, iron liquid B composition W (C): 3.4-3.5%; W (Si): 1.7-1.9%; W (Mn): 0.7-0.8%, 0＜W (P)≤0.1%, 0＜W (S)≤0.1%.
8. a kind of diesel engine grey cast-iron bell housing Iron Mould Coated Sand casting technique according to claim 1 is characterized in that: cast temperature 1350-1400 ℃ of said step (6).
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1766587A1 (en) * | 1990-04-10 | 1992-10-07 | Центральный научно-исследовательский институт материалов | Method for production of boxless moulds by vacuum moulding |
| US5611388A (en) * | 1993-09-02 | 1997-03-18 | Mazda Motor Corporation | Method of and apparatus for low-pressure casting |
| CN201257495Y (en) * | 2008-09-08 | 2009-06-17 | 浙江省机电设计研究院有限公司 | Iron type sand coated casting exhaust system |
| CN201333499Y (en) * | 2008-12-18 | 2009-10-28 | 陆良县宏利曲轴厂 | Diesel engine body casting mold |
| CN102380586A (en) * | 2011-10-18 | 2012-03-21 | 浙江省机电设计研究院有限公司 | Device and production method for manufacturing automobile rear axle cast through metal mold with sand lining |
-
2012
- 2012-07-24 CN CN201210255964.1A patent/CN102728790B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1766587A1 (en) * | 1990-04-10 | 1992-10-07 | Центральный научно-исследовательский институт материалов | Method for production of boxless moulds by vacuum moulding |
| US5611388A (en) * | 1993-09-02 | 1997-03-18 | Mazda Motor Corporation | Method of and apparatus for low-pressure casting |
| CN201257495Y (en) * | 2008-09-08 | 2009-06-17 | 浙江省机电设计研究院有限公司 | Iron type sand coated casting exhaust system |
| CN201333499Y (en) * | 2008-12-18 | 2009-10-28 | 陆良县宏利曲轴厂 | Diesel engine body casting mold |
| CN102380586A (en) * | 2011-10-18 | 2012-03-21 | 浙江省机电设计研究院有限公司 | Device and production method for manufacturing automobile rear axle cast through metal mold with sand lining |
Non-Patent Citations (2)
| Title |
|---|
| 陈万林等: "《实用模具技术》", 30 September 2000, 机械工业出版社 * |
| 陈允南等: "《热芯盒射芯》", 31 August 1985, 机械工业出版社 * |
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