CN102407310A - Method for casting cylinder body of hydraulic oil cylinder - Google Patents
Method for casting cylinder body of hydraulic oil cylinder Download PDFInfo
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- CN102407310A CN102407310A CN2011102914155A CN201110291415A CN102407310A CN 102407310 A CN102407310 A CN 102407310A CN 2011102914155 A CN2011102914155 A CN 2011102914155A CN 201110291415 A CN201110291415 A CN 201110291415A CN 102407310 A CN102407310 A CN 102407310A
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- cylinder body
- hydraulic jack
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Abstract
The invention provides a method for casting a cylinder body of a hydraulic oil cylinder. The method comprises the following steps of: placing a die of the cylinder body of the hydraulic oil cylinder on a turntable of a centrifugal casting machine in a manner that the axial core of the die is the same as that of the turntable; then turning on the casting machine; pouring smelted liquid steel into the die at a die rotation state so as to cast the outer wall of the cylinder body of the hydraulic oil cylinder; after the temperature of the liquid steel is reduced to be lower than a liquid-to-solid conversion temperature, turning off a centrifuge and pouring the liquid steel into the die again rapidly so as to cast the bottom of the cylinder body of the hydraulic oil cylinder; and after the temperature of the poured liquid steel is reduced to be lower than the liquid-to-solid conversion temperature, directly opening the die. The cylinder body is normalized so that the cylinder body of the hydraulic oil cylinder achieves mechanical properties without one more time heat treatment. By utilizing the cylinder body of the hydraulic oil cylinder which is produced by the invention, the yield is high, the energy consumption is low, no waste sand is discharged, the product quality is good, and the use effect is equivalent to that of the forged cylinder body of the hydraulic oil cylinder. Therefore, the emission of wastes and greenhouse gases is greatly reduced, thereby saving a great amount of sources and energy for the nation and reducing the cost for users.
Description
Technical field
The present invention relates to casting technology field, specifically is a kind of method of the hydraulic jack cylinder body of casting.
Background technology
Existing foundry engieering adopts the mode of molding sand cast mostly, causes the discharging of discarded object, greenhouse gases, causes a large amount of resources and energy waste simultaneously, and user's cost is also higher.
How to provide that a kind of step is simple, cost is lower, no waste discharge and being suitable for economizes on resources and the method for the casting hydraulic jack cylinder body of the energy, is the technical problem that this area will solve.
Summary of the invention
The technical problem that the present invention will solve provides that a kind of step is simple, cost is lower, no waste discharge and being suitable for economizes on resources and the method for the casting hydraulic jack cylinder body of the energy.
In order to solve the problems of the technologies described above, the invention provides a kind of method of the hydraulic jack cylinder body of casting, comprise the steps:
A, the mould concentric of hydraulic jack cylinder body is placed on the centrifugal casting machine rotating disk, opens casting machine then, under said mould rotation status, melted molten steel is injected in this mould, with the outer wall of casting hydraulic jack cylinder body;
B, treat that liquid steel temperature reduces to liquidly when temperature of a solid-state transition is following, close down centrifuge, and in said mould, inject molten steel once more rapidly, with the bottom of casting hydraulic jack cylinder body;
C, liquid steel temperature to be re-injected are reduced to liquid when temperature of a solid-state transition is following, and directly die sinking makes the hydraulic jack cylinder body normalizing of cast, does not need to make the hydraulic jack cylinder body reach mechanical property through heat treatment once more.
Particularly, said mould is the all-metal type, and casting system does not have molding sand; The cast temperature of said molten steel is 1500-1600 ℃.
Particularly, said when the good hydraulic jack cylinder body of casting is cooled to 850-900 ℃, die sinking; After the die sinking,, when being cooled to 400-450 ℃, cover so that its slow cooling with metal cap with the direct air cooling in air of hydraulic jack cylinder body; Guarantee that the hydraulic jack cylinder body does not need normalized treatment and tensile strength is reached more than the 500MPa.
In said steps A, behind the outer wall casting complete of said cylinder body, sprinkle scum silica frost glass at molten steel surface rapidly, to prevent molten steel oxidation, cause twice molten steel to combine bad.
In said steps A, after molten steel injects mould, when recording liquid steel temperature and be cooled to 1250-1300 ℃, close down centrifuge with temperature-measuring gun, this moment is cast oil cylinder bottom rapidly, it is good to guarantee that twice molten steel combines, do not have be mingled with, defective such as pore.
In said step B, when in said mould, injecting molten steel once more, cast temperature is at 1600-1650 ℃.
Further, added the heavy rare earth alterant in the said molten steel,, improved the overall quality of product to improve the mechanical property of cylinder body; The weight ratio of heavy rare earth alterant and molten steel is 0.5-1.5: 100.
Technique scheme of the present invention is compared prior art and is had the following advantages: the method for casting hydraulic jack cylinder body of the present invention; The hydraulic jack cylinder body yield rate of producing is high, low, the no antiquated sand of energy consumption discharges, good product quality, and result of use is suitable with forging compound compressing cylinder cylinder body.Thereby greatly reduce the discharging of discarded object, greenhouse gases,, also reduced cost for the user for country has practiced thrift a large amount of resources and the energy.
The specific embodiment
The method of the casting hydraulic jack cylinder body of present embodiment comprises the steps:
A, the mould concentric of hydraulic jack cylinder body is placed on the centrifugal casting machine rotating disk, opens casting machine then, under said mould rotation status, melted molten steel is injected in this mould, with the outer wall of casting hydraulic jack cylinder body; The rotary speed of said centrifuge, according to the sized of cylinder body and the size of centrifuge roller, the centrifuge rotary speed is different, and speed is between 800-1500 rev/min; Can when practical operation, adjust according to field condition.
B, treat that liquid steel temperature reduces to liquidly when temperature of a solid-state transition is following, close down centrifuge, and in said mould, inject molten steel once more rapidly, with the bottom of casting hydraulic jack cylinder body;
C, liquid steel temperature to be re-injected are reduced to liquid when temperature of a solid-state transition is following, and directly die sinking makes the hydraulic jack cylinder body normalizing of cast, does not need to make the hydraulic jack cylinder body reach mechanical property through heat treatment once more.
Said mould is the all-metal type, and casting system does not have molding sand; The cast temperature of said molten steel is 1550 ℃.
In said steps A, behind the outer wall casting complete of said cylinder body, sprinkle scum silica frost glass at molten steel surface rapidly, to prevent molten steel oxidation, cause twice molten steel to combine bad.Scum silica frost glass is a kind of protective agent that prevents that metal is oxidized, and main feature is to have specific temperature-viscograph, has good wink fusibleness, film forming, closure and floatability, is the optimal protective materials of foundry industry.
In said steps A, after molten steel injects mould, when recording liquid steel temperature and be cooled to 1275 ℃, close down centrifuge with temperature-measuring gun, this moment is cast oil cylinder bottom rapidly, it is good to guarantee that twice molten steel combines, do not have be mingled with, defective such as pore.
In said step B, when in said mould, injecting molten steel once more, cast temperature is at 1625 ℃.
Said when the good hydraulic jack cylinder body of casting is cooled to 875 ℃, die sinking; After the die sinking,, when being cooled to 425 ℃, cover so that its slow cooling with metal cap with the direct air cooling in air of hydraulic jack cylinder body; Guarantee that the hydraulic jack cylinder body does not need normalized treatment and tensile strength is reached more than the 500MPa.
Added the heavy rare earth alterant in the said molten steel,, improved the overall quality of product to improve the mechanical property of cylinder body; The weight ratio of heavy rare earth alterant and molten steel is 1: 100.
Obviously, the foregoing description only be for clearly the present invention is described and is done for example, and be not to be qualification to embodiment of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (9)
1. the method for hydraulic jack cylinder body of casting is characterized in that comprising the steps:
A, the mould concentric of hydraulic jack cylinder body is placed on the centrifugal casting machine rotating disk, opens casting machine then, under said mould rotation status, melted molten steel is injected in this mould, with the outer wall of casting hydraulic jack cylinder body;
B, treat that liquid steel temperature reduces to liquidly when temperature of a solid-state transition is following, close down centrifuge, and in said mould, inject molten steel once more rapidly, with the bottom of casting hydraulic jack cylinder body;
C, liquid steel temperature to be re-injected are reduced to liquid when temperature of a solid-state transition is following, directly die sinking.
2. the method for casting hydraulic jack cylinder body according to claim 1 is characterized in that: said mould is the all-metal type.
3. the method for casting hydraulic jack cylinder body according to claim 1 is characterized in that: the cast temperature of said molten steel is 1500-1600 ℃.
4. the method for casting hydraulic jack cylinder body according to claim 1 is characterized in that: said when the good hydraulic jack cylinder body of casting is cooled to 850-900 ℃, and die sinking.
5. according to the method for the described casting hydraulic jack of one of claim 1-4 cylinder body, it is characterized in that: after the die sinking,, when being cooled to 400-450 ℃, cover so that its slow cooling with metal cap with the direct air cooling in air of hydraulic jack cylinder body.
6. according to the method for the described casting hydraulic jack of one of claim 1-4 cylinder body, it is characterized in that: in said steps A, behind the outer wall casting complete of said cylinder body, sprinkle scum silica frost glass at molten steel surface rapidly.
7. the method for casting hydraulic jack cylinder body according to claim 1 is characterized in that: in said steps A, after molten steel injects mould, when recording liquid steel temperature and be cooled to 1250-1300 ℃ with temperature-measuring gun, close down centrifuge.
8. according to the method for claim 1 or 7 described casting hydraulic jack cylinder bodies, it is characterized in that: in said step B, when in said mould, injecting molten steel once more, cast temperature is at 1600-1650 ℃.
9. according to the method for the described casting hydraulic jack of one of claim 1-4 cylinder body, it is characterized in that: added the heavy rare earth alterant in the said molten steel, the weight ratio of heavy rare earth alterant and molten steel is 0.5-1.5: 100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102914155A CN102407310A (en) | 2011-09-30 | 2011-09-30 | Method for casting cylinder body of hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102914155A CN102407310A (en) | 2011-09-30 | 2011-09-30 | Method for casting cylinder body of hydraulic oil cylinder |
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| Publication Number | Publication Date |
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| CN102407310A true CN102407310A (en) | 2012-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102914155A Pending CN102407310A (en) | 2011-09-30 | 2011-09-30 | Method for casting cylinder body of hydraulic oil cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107199326A (en) * | 2017-08-04 | 2017-09-26 | 安徽恒利增材制造科技有限公司 | A kind of casting method of steel copper composite cylinder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190041A (en) * | 1997-02-05 | 1998-08-12 | 杜永康 | Bimetallic centrifugal casting process for cylindrical casting |
| CN1213599A (en) * | 1998-11-23 | 1999-04-14 | 辽河石油勘探局钻井一公司 | Prodn. tech. of mud pump composite steel bushing |
| CN1504287A (en) * | 2002-11-28 | 2004-06-16 | 第一高周波工业株式会社 | Production method of inner coated cylinder, manufacturing device and inner coated cylinder |
| CN101224492A (en) * | 2007-01-19 | 2008-07-23 | 王晓瑛 | Forging method of in-wheel motor housing and techniques thereof |
| CN101890489A (en) * | 2010-06-24 | 2010-11-24 | 宁国市南洋铁球有限公司 | Novel process centrifugally casting wear-resistance microspheres and micro-forging |
-
2011
- 2011-09-30 CN CN2011102914155A patent/CN102407310A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190041A (en) * | 1997-02-05 | 1998-08-12 | 杜永康 | Bimetallic centrifugal casting process for cylindrical casting |
| CN1213599A (en) * | 1998-11-23 | 1999-04-14 | 辽河石油勘探局钻井一公司 | Prodn. tech. of mud pump composite steel bushing |
| CN1504287A (en) * | 2002-11-28 | 2004-06-16 | 第一高周波工业株式会社 | Production method of inner coated cylinder, manufacturing device and inner coated cylinder |
| CN101224492A (en) * | 2007-01-19 | 2008-07-23 | 王晓瑛 | Forging method of in-wheel motor housing and techniques thereof |
| CN101890489A (en) * | 2010-06-24 | 2010-11-24 | 宁国市南洋铁球有限公司 | Novel process centrifugally casting wear-resistance microspheres and micro-forging |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107199326A (en) * | 2017-08-04 | 2017-09-26 | 安徽恒利增材制造科技有限公司 | A kind of casting method of steel copper composite cylinder |
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Application publication date: 20120411 |