CN106077487A - The Iron Mould Coated Sand technique of Large Crankshaft - Google Patents
The Iron Mould Coated Sand technique of Large Crankshaft Download PDFInfo
- Publication number
- CN106077487A CN106077487A CN201610543082.3A CN201610543082A CN106077487A CN 106077487 A CN106077487 A CN 106077487A CN 201610543082 A CN201610543082 A CN 201610543082A CN 106077487 A CN106077487 A CN 106077487A
- Authority
- CN
- China
- Prior art keywords
- sand
- swage
- mould coated
- large crankshaft
- technique
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/068—Semi-permanent moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
Abstract
The present invention is the Iron Mould Coated Sand technique of Large Crankshaft, comprises the steps: a, preparation: make 2 swages that are mutually symmetrical with and that agree with mutually with bent axle one side of something profile；B, post processing: offer precoated sand in swage middle and lower part and fill hole, and swage inner surface is covered sand process, make swage inner surface be covered with an overlay film layer of sand；C, pour: molten iron is poured in swage, final curing molding.The present invention uses above-mentioned steps not only by original 70%, yield rate to be promoted to 95%, more reduces the piece weight of 10%, improves the molten iron utilization rate of 15%, energy efficient 30%.
Description
Technical field:
The present invention relates to heavy castings preparation technology field, particularly to the Iron Mould Coated Sand technique of Large Crankshaft.
Background technology:
Large-scale one-throw crankshaft, such as: axle journal ￠ 130～150mm, the bent axle of substance 200～400kg.Prepared by prior art
The shortcoming of this kind of bent axle is that technology stability is poor, and yield rate is low.For obtaining the material structure of high compactness, use substantial amounts of cold
Ferrum, even conformal chill.Therefore surface quality is poor, and geometric accuracy is poor, and allowance is big.
Summary of the invention:
The purpose of the present invention is aiming at the deficiency of prior art, and provides the Iron Mould Coated Sand technique of Large Crankshaft, solves existing
Having yield rate in technology low, surface quality is poor, and geometric accuracy is poor, the problem that allowance is big.
The technology solution of the present invention is as follows:
The Iron Mould Coated Sand technique of Large Crankshaft, comprises the steps:
A, preparation: make 2 swages that are mutually symmetrical with and that agree with mutually with bent axle one side of something profile；
B, post processing: offer precoated sand in swage middle and lower part and fill hole, and swage inner surface is covered sand process, in making swage
Surface is covered with an overlay film layer of sand；
C, pour: molten iron is poured in swage, final curing molding.
As preferably, swage thickness is 20cm～30cm.Swage thickness 20～30mm, its weight is about casting weight
5～8 times, provide not only good cooling condition, and as the attachment of overlay film layer of sand, enhance the rigidity of casting mold and move back
Allowing property.
As preferably, cover overlay film layer of sand during sand processes and covered at swage inner surface by air pressure by covering sand equipment for covering sand
On.
As preferably, the thickness of overlay film layer of sand is 8～10mm.Thickness 8～10mm overlay film layer of sand is heat cure, belongs to hard
Mould, it is provided that good mo(U)ld face quality and rigidity.
As preferably, pouring in step, the temperature of molten iron is 1440 DEG C～1480 DEG C.
As preferably, the carbon content in molten iron is 3.0%～5.0%.Increasing substantially the carbon content in molten iron can be effective
The volume utilizing carbon to expand volume increase and the liquid contraction generation produced reduces reaches dynamic equilibrium, thus without entering with rising head
The state of row feeding.
As preferably, pour in step, also include intensive inoculation process.
As preferably, intensive inoculation process is, molten iron reserves the Si amount of 0.7%～1%, after coming out of the stove, with current-following inoculation, protects
The mode with instant inoculation that inside breeds adds.The volume that thus can effectively utilize Si and carbon interaction to produce increases and liquid
State is shunk the volume minimizing produced and is reached dynamic equilibrium, thus without carrying out the state of feeding with rising head.
The beneficial effects of the present invention is:
The present invention uses above-mentioned steps not only by original 70%, yield rate to be promoted to 95%, more reduces the piece weight of 10%,
Improve the molten iron utilization rate of 15%, energy efficient 30%.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the present invention；
In figure: 1 is bent axle；2 is swage；3 is overlay film layer of sand；4 fill hole for precoated sand.
Detailed description of the invention:
Embodiment 1: the Iron Mould Coated Sand technique of Large Crankshaft, comprises the steps:
A, preparation: make 2 swages 2 that are mutually symmetrical with and that agree with mutually with bent axle 1 one side of something profile；
B, post processing: offer precoated sand in swage 2 middle and lower part and fill hole 4, and swage 2 inner surface is covered sand process, make ferrum
Type 2 inner surface is covered with an overlay film layer of sand 3；
C, pour: molten iron is poured in swage 2, final curing molding.
Swage 2 thickness is 20cm.
Cover overlay film layer of sand 3 during sand processes to be covered on swage 2 inner surface by air pressure by covering sand equipment for covering sand.
The thickness of overlay film layer of sand 3 is 8mm.
Pouring in step, the temperature of molten iron is 1440 DEG C.
Carbon content in molten iron is 3.0%.
Pour in step, also include intensive inoculation process.
Intensive inoculation process is, molten iron reserves the Si amount of 0.7%, after coming out of the stove, with current-following inoculation, breeds with instantaneous in guarantor
The mode bred adds.
Embodiment 2: the Iron Mould Coated Sand technique of Large Crankshaft, comprises the steps:
A, preparation: make 2 swages 2 that are mutually symmetrical with and that agree with mutually with bent axle 1 one side of something profile；
B, post processing: offer precoated sand in swage 2 middle and lower part and fill hole 4, and swage 2 inner surface is covered sand process, make ferrum
Type 2 inner surface is covered with an overlay film layer of sand 3；
C, pour: molten iron is poured in swage 2, final curing molding.
Swage 2 thickness is 30cm.
Cover overlay film layer of sand 3 during sand processes to be covered on swage 2 inner surface by air pressure by covering sand equipment for covering sand.
The thickness of overlay film layer of sand 3 is 10mm.
Pouring in step, the temperature of molten iron is 1480 DEG C.
Carbon content in molten iron is 5.0%.
Pour in step, also include intensive inoculation process.
Intensive inoculation process is, molten iron reserves the Si amount of 1%, after coming out of the stove, with current-following inoculation, breeds pregnant with instantaneous in guarantor
The mode educated adds.
Embodiment 3: the Iron Mould Coated Sand technique of Large Crankshaft, comprises the steps:
A, preparation: make 2 swages 2 that are mutually symmetrical with and that agree with mutually with bent axle 1 one side of something profile；
B, post processing: offer precoated sand in swage 2 middle and lower part and fill hole 4, and swage 2 inner surface is covered sand process, make ferrum
Type 2 inner surface is covered with an overlay film layer of sand 3；
C, pour: molten iron is poured in swage 2, final curing molding.
Swage 2 thickness is 25cm.
Cover overlay film layer of sand 3 during sand processes to be covered on swage 2 inner surface by air pressure by covering sand equipment for covering sand.
The thickness of overlay film layer of sand 3 is 9mm.
Pouring in step, the temperature of molten iron is 1450 DEG C.
Carbon content in molten iron is 4.6%.
Pour in step, also include intensive inoculation process.
Intensive inoculation process is, molten iron reserves the Si amount of 0.8%, after coming out of the stove, with current-following inoculation, breeds with instantaneous in guarantor
The mode bred adds.
The foregoing is only presently preferred embodiments of the present invention, those of ordinary skill in the art are not making creative work
The every other embodiment obtained under premise, all should belong to the scope of protection of the invention.
Claims (8)
1. the Iron Mould Coated Sand technique of Large Crankshaft, it is characterised in that: comprise the steps:
A, preparation: make 2 swages that are mutually symmetrical with and that agree with mutually with bent axle one side of something profile；
B, post processing: offer precoated sand in swage middle and lower part and fill hole, and swage inner surface is covered sand process, in making swage
Surface is covered with an overlay film layer of sand；
C, pour: molten iron is poured in swage, final curing molding.
The Iron Mould Coated Sand technique of Large Crankshaft the most according to claim 1, it is characterised in that: described swage thickness is 20cm
～30cm.
The Iron Mould Coated Sand technique of Large Crankshaft the most according to claim 1, it is characterised in that cover overlay film during sand processes described in:
Layer of sand is to cover sand to be covered on swage inner surface by air pressure by covering sand equipment.
The Iron Mould Coated Sand technique of Large Crankshaft the most according to claim 3, it is characterised in that: the thickness of described overlay film layer of sand
It is 8～10mm.
The Iron Mould Coated Sand technique of Large Crankshaft the most according to claim 1, it is characterised in that pour described in: in step, ferrum
The temperature of water is 1440 DEG C～1480 DEG C.
The Iron Mould Coated Sand technique of Large Crankshaft the most according to claim 5, it is characterised in that: the carbon content in described molten iron
It is 3.0%～5.0%.
The Iron Mould Coated Sand technique of Large Crankshaft the most according to claim 6, it is characterised in that pour described in: in step, also
Including intensive inoculation process.
The Iron Mould Coated Sand technique of Large Crankshaft the most according to claim 7, it is characterised in that: described intensive inoculation process
For, molten iron reserves the Si amount of 0.7%～1%, and after coming out of the stove, with current-following inoculation, the mode with instant inoculation that breeds in guarantor adds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610543082.3A CN106077487A (en) | 2016-07-12 | 2016-07-12 | The Iron Mould Coated Sand technique of Large Crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610543082.3A CN106077487A (en) | 2016-07-12 | 2016-07-12 | The Iron Mould Coated Sand technique of Large Crankshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106077487A true CN106077487A (en) | 2016-11-09 |
Family
ID=57219628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610543082.3A Pending CN106077487A (en) | 2016-07-12 | 2016-07-12 | The Iron Mould Coated Sand technique of Large Crankshaft |
Country Status (1)
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| CN (1) | CN106077487A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108044073A (en) * | 2018-01-23 | 2018-05-18 | 洛阳乾中新材料科技有限公司 | A kind of chill with exhaust level and preparation method thereof, the preparation method of casting |
| CN112589054A (en) * | 2020-12-20 | 2021-04-02 | 十堰市泰祥实业股份有限公司 | Sand-lined casting method for gray cast iron automobile engine main bearing cap iron mold |
| CN114000041A (en) * | 2021-11-04 | 2022-02-01 | 湖州鼎盛机械制造有限公司 | Efficient spheroidizing inoculation treatment method and process for producing high-quality ductile iron parts |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5479981A (en) * | 1993-12-29 | 1996-01-02 | Hyundai Motor Company | Method for casting a hollow camshaft for internal combustion engine |
| CN101380669A (en) * | 2008-08-19 | 2009-03-11 | 侯马市模范机械制造有限公司 | Method for eliminating contraction stomata around iron crankshaft core of iron sand lined steel casting ball |
| CN102319873A (en) * | 2011-10-10 | 2012-01-18 | 广西玉林玉柴机器配件制造有限公司 | The production method of Iron Mould Coated Sand cast block |
| CN102728790A (en) * | 2012-07-24 | 2012-10-17 | 江苏松林汽车零部件有限公司 | Sand-line iron mould casting process for grey cast iron flywheel housing of diesel engine |
| CN103602880A (en) * | 2013-12-04 | 2014-02-26 | 海安县万力铸造有限公司 | As-cast condition production method of high strength and toughness QT850-5 crankshaft |
| CN104264035A (en) * | 2014-09-29 | 2015-01-07 | 侯马市东鑫机械铸造有限公司 | High-performance nodular cast iron crankshaft and preparation method thereof |
-
2016
- 2016-07-12 CN CN201610543082.3A patent/CN106077487A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5479981A (en) * | 1993-12-29 | 1996-01-02 | Hyundai Motor Company | Method for casting a hollow camshaft for internal combustion engine |
| CN101380669A (en) * | 2008-08-19 | 2009-03-11 | 侯马市模范机械制造有限公司 | Method for eliminating contraction stomata around iron crankshaft core of iron sand lined steel casting ball |
| CN102319873A (en) * | 2011-10-10 | 2012-01-18 | 广西玉林玉柴机器配件制造有限公司 | The production method of Iron Mould Coated Sand cast block |
| CN102728790A (en) * | 2012-07-24 | 2012-10-17 | 江苏松林汽车零部件有限公司 | Sand-line iron mould casting process for grey cast iron flywheel housing of diesel engine |
| CN103602880A (en) * | 2013-12-04 | 2014-02-26 | 海安县万力铸造有限公司 | As-cast condition production method of high strength and toughness QT850-5 crankshaft |
| CN104264035A (en) * | 2014-09-29 | 2015-01-07 | 侯马市东鑫机械铸造有限公司 | High-performance nodular cast iron crankshaft and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108044073A (en) * | 2018-01-23 | 2018-05-18 | 洛阳乾中新材料科技有限公司 | A kind of chill with exhaust level and preparation method thereof, the preparation method of casting |
| CN108044073B (en) * | 2018-01-23 | 2019-08-27 | 洛阳乾中新材料科技有限公司 | A kind of preparation method of chill with exhaust level and preparation method thereof, casting |
| CN112589054A (en) * | 2020-12-20 | 2021-04-02 | 十堰市泰祥实业股份有限公司 | Sand-lined casting method for gray cast iron automobile engine main bearing cap iron mold |
| CN114000041A (en) * | 2021-11-04 | 2022-02-01 | 湖州鼎盛机械制造有限公司 | Efficient spheroidizing inoculation treatment method and process for producing high-quality ductile iron parts |
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Application publication date: 20161109 |