CN101972842B - Sealed centrifugal casting method - Google Patents
Sealed centrifugal casting method Download PDFInfo
- Publication number
- CN101972842B CN101972842B CN201010527126A CN201010527126A CN101972842B CN 101972842 B CN101972842 B CN 101972842B CN 201010527126 A CN201010527126 A CN 201010527126A CN 201010527126 A CN201010527126 A CN 201010527126A CN 101972842 B CN101972842 B CN 101972842B
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- China
- Prior art keywords
- mould
- sealed
- spinning method
- casting
- preheating
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- 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.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
- B22D13/026—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis the longitudinal axis being vertical
Abstract
The invention discloses a sealed centrifugal casting method which comprises the following steps: (1) arranging a pressing cover capable of moving up and down on a vertical centrifugal machine, wherein the opening of a mold is tightly pressed and sealed by the pressing cover; (2) preheating the mold; (3) casting fully molten metal liquid in the preheated mold; (4) putting the mold containing the molten metal liquid on the vertical centrifugal machine, moving the pressing cover downwards, sealing the opening of the mold, and then, rotating the vertical centrifugal machine until the molten metal is changed into solid metal; and (5) taking the cooled blank out of the mold, and carrying out follow-up processing on the cooled blank. The invention has the advantages of simple process, convenient operation, batch production, stable and reliable quality and low production cost. The casting manufactured by the sealed centrifugal casting method of the invention does not have casting defects such as air bubbles, sand holes, loosening and the like, and the invention improves the compactness of the casting and simultaneously enhances the comprehensive properties such as strength, wear resistance and the like of the casting.
Description
Technical field
Metal of the present invention or nonmetal casting field relate in particular to a kind of sealed centre spinning method.
Background technology
At present, conventional casting technique can be divided into two types of conventional cast and Special Processes of Metal Castings.Conventional cast is exactly the casting technique through self gravitation cast molding in mould of liquation.Special Processes of Metal Castings are divided into: compression casting and vacuum pressing and casting, centrifugal casting etc.
In routine casting, often have pore, sand holes, casting flaw such as loose, often cause intensity gradually to descend, safety coefficient reduces, and product quality is difficult to problems such as assurance.Though compression casting and vacuum pressing and casting can be eliminated pore, sand holes, casting flaw such as loose; Obtain the foundry goods of dense structure, grain refinement, but above-mentioned two kinds of casting method pouring temperatures on be limited to 950 ℃, in case surpass this temperature; A lot of technical problems can appear; Intensity like equipment and mold can reduce with the raising of temperature, and distortion can appear in equipment and mold, causes safety and quality accident.Moreover the equipment and mold of above-mentioned two kinds of methods involves great expense, invests big.
And centrifugal casting is to make cast member coagulation forming under centrifugal action, also can obtain the foundry goods of dense structure, grain refinement, mechanical strength raising.But present this method only is fit to do thin-walled jacket casing class foundry goods.
Summary of the invention
The technical problem that the present invention will solve is to overcome the defective that prior art exists, and a kind of sealed centre spinning method is provided, and can make the less porose entity foundry goods in aperture.
The method of a kind of sealed centrifugal casting provided by the invention comprises the steps:
1) gland that moves up and down is set on vertical centrifugal machine, said gland can compress and the sealed mold mouth;
2) mould is carried out preheating;
3) water in the mould after preheating and fill with molten metal liquid;
The mould that 4) molten metal liquid will be housed is placed on the vertical centrifugal machine, and gland moves down and with the sealing of mould mouth, and vertical centrifugal machine rotation then becomes solid-state until the metal of molten condition;
5) cooled blank is taken out from mould, carry out following process.
Preferably, around the said gland step is set, in order to the mould that links closely.
Preferably, step 2) in, the temperature of said preheating is 680 ℃～1050 ℃, the time of preheating is 30 minutes～120 minutes.
Preferably, the internal diameter of the external diameter of mould mouth and gland adapts.
Preferably, step 2) in, the preheat temperature of mould than pouring temperature low 100 ℃～200 ℃, to guarantee that metal is a molten condition when centrifugal.
Preferably, the inner chamber of mould has 1.5 °～3 ° dimension.
Preferably, the inner chamber at mould is coated with releasing agent.At the dies cavity coating release agent, can be convenient to the blank demoulding.
Preferably, the preheating step 2) is: mould is put into electric furnace carry out preheating.
Preferably, in the step 4), the rotating speed during the vertical centrifugal machine rotation is 354 rev/mins～3000 rev/mins, and rotational time is 0.5 minute～120 minutes.
Compared with prior art; Sealed centre spinning method of the present invention is because the mould of when centrifugal, inner chamber being filled motlten metal has been implemented sealing, in centrifugal process; There is not molten metal to flow out; Thereby made foundry goods center only forms a pore that diameter is very little, so just can realize the processing of most of porose entity foundry goods, and most porose entity foundry goods centrifugal process are come true.Sealed centre spinning method of the present invention has following advantage:
1) technology is simple, easy to operate, can produce in batches;
2) owing to adopt sealed centrifugal means, the foundry goods after centrifugal does not have bubble, and steady quality is reliable, can improve yields, reduces product cost;
3) owing to adopt sealed centrifugal means, avoid sand holes, casting flaw such as loose, and improved the packing of foundry goods, strengthened the combination properties such as intensity, wearability of foundry goods.
Description of drawings
Fig. 1 is the flow chart of the sealed centre spinning method of the present invention;
Fig. 2 is the partial schematic diagram of the used vertical centrifugal machine of the sealed centre spinning method of the present invention.
The specific embodiment
For making content of the present invention clearer, understandable, below be elaborated through concrete embodiment.
Referring to Fig. 1, sealed centre spinning method of the present invention, the practical implementation step is following:
S1, a gland that moves up and down is set on vertical centrifugal machine, said gland can compress and the sealed mold mouth;
S2, mould is carried out preheating;
Water in S3, the mould after preheating and fill with molten metal liquid;
S4, the mould that molten metal liquid will be housed are placed on the vertical centrifugal machine, and gland moves down and with the sealing of mould mouth, and vertical centrifugal machine rotation then becomes solid-state until the metal of molten condition;
S5, cooled blank is taken out from mould, carry out following process.
The present invention is owing to the mould of inner chamber being filled motlten metal has been implemented sealing; In centrifugal process; There is not molten metal to flow out; Made foundry goods center only forms a pore that diameter is very little, so just meets most of porose entity foundry goods processing, and most porose entity foundry goods centrifugal process are come true.Have that technology is simple, easy to operate can be produced in batches, steady quality is reliable, reduces the advantage of product cost.Foundry goods after centrifugal does not have bubble, sand holes, casting flaw such as loose, and improved the packing of foundry goods.Strengthened the intensity of foundry goods, combination properties such as wearability.
Referring to Fig. 2, the used vertical centrifugal machine of sealed centre spinning method of the present invention comprises gland 1, mould 2, base 3, and base 3 is arranged on the body, can rotate with body, and mould 2 is arranged on the base 3, together rotates with base.Gland 1 can move up and down, and during work, gland 1 moves down, and with the port closed of mould 2, then vertical centrifugal machine rotates, beginning centrifugal casting, after casting is accomplished, with gland 1 open and on move.
Below through a preferred embodiment sealed centre spinning method of the present invention is elaborated.
Preferred embodiment
In this preferred embodiment, be that example describes the present invention with the pinion of making in the valve electric actuator.
The manufacturing specification of this pinion is:
Diameter is 45mm, internal diameter 12mm, thickness 10mm, tooth depth 2mm.
Reference examples:
In the prior art, this kind pinion all adopts conventional cast to cast the manufacture of bar and then processing, and pore or sand holes are arranged in the processing, be difficult to ensure the quality of products, and cost is high.
Method of the present invention:
Use the sealed centre spinning method of the present invention to make above-mentioned pinion, its step is following:
1) intracavity diameter with mould is processed as 50mm, stays allowance, demoulding dimension 3 degree, height 150mm.(can process 10～12 gears)
2) coating release agent (graphite adds water) on the inner chamber of mould is put into the electric furnace preheating then, and preheat temperature is lower than 100 ℃ of pouring temperatures, and promptly 980 ℃, be 30 minutes preheating time;
3) copper alloy (trade mark is ZHA166-6-3-2) of cast molten condition in mould, temperature is 1080 ℃;
4) mould is placed on the vertical centrifugal machine, the rotating speed of setting vertical centrifugal machine according to the inside radius of gravitation multiple of working and foundry goods is 2990 rev/mins, approximates 3000 rev/mins; Moving down gland compresses gland and the sealed mold mouth; Then start vertical centrifugal machine, its rotating speed is adjusted into 3000 rev/mins, carry out centrifugal rotation; Become solid-stately until the copper alloy (ZHA166-6-3-2) of fusion, centrifugation time was got 0.5 minute.
5) behind centrifugal the finishing mould is taken off from vertical centrifugal machine, naturally cooling;
6) foundry goods is taken out in the cooling back from mould, carries out following process, finally makes gear;
With the gear that makes, deliver to Tianjin mechanotronics metal material inspection center and detect, through detecting proof; Its tensile strength is 700Mpa, and hardness is HB232, and performance is far above (tensile strength is 637Mpa with the copper alloy of the trade mark among the GB GB1176-74; Hardness is HB160), the gear that uses the inventive method to make, the product comprehensive mechanical performance improves greatly; Product quality is guaranteed, thereby has reduced cost.
Only be preferred implementation of the present invention below, should be pointed out that above-mentioned preferred implementation should not be regarded as limitation of the present invention, protection scope of the present invention should be as the criterion with claim institute restricted portion.For those skilled in the art, do not breaking away from the spirit and scope of the present invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (9)
1. a sealed centre spinning method is characterized in that, comprises the steps:
1) gland that moves up and down is set on vertical centrifugal machine, said gland can compress and the sealed mold mouth;
2) mould is carried out preheating;
3) water in the mould after preheating and fill with molten metal liquid;
The mould that 4) molten metal liquid will be housed is placed on the vertical centrifugal machine, and gland moves down and with the sealing of mould mouth, and vertical centrifugal machine rotation then becomes solid-state until the metal of molten condition;
5) cooled blank is taken out from mould, carry out following process.
2. sealed centre spinning method according to claim 1 is characterized in that, around the said gland step is set, in order to the mould that links closely.
3. sealed centre spinning method according to claim 1 is characterized in that step 2) in, the temperature of said preheating is 680 ℃～1050 ℃, the time of preheating is 30 minutes～120 minutes.
4. sealed centre spinning method according to claim 1 is characterized in that, the external diameter of mould mouth and the internal diameter of gland adapt.
5. sealed centre spinning method according to claim 1 is characterized in that step 2) in, the preheat temperature of mould than pouring temperature low 100 ℃～200 ℃.
6. sealed centre spinning method according to claim 1 is characterized in that, the inner chamber of mould has 1.5 °～3 ° tapering.
7. sealed centre spinning method according to claim 1 is characterized in that, is coated with releasing agent at the inner chamber of mould.
8. sealed centre spinning method according to claim 1 is characterized in that step 2) in preheating be: mould is put into electric furnace carries out preheating.
9. sealed centre spinning method according to claim 1 is characterized in that, in the step 4), the rotating speed during the vertical centrifugal machine rotation is 354 rev/mins～3000 rev/mins, and rotational time is 0.5 minute～120 minutes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010527126A CN101972842B (en) | 2010-10-29 | 2010-10-29 | Sealed centrifugal casting method |
| PCT/CN2011/075658 WO2012055245A1 (en) | 2010-10-29 | 2011-06-13 | Sealed centrifugal casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010527126A CN101972842B (en) | 2010-10-29 | 2010-10-29 | Sealed centrifugal casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101972842A CN101972842A (en) | 2011-02-16 |
| CN101972842B true CN101972842B (en) | 2012-09-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010527126A Expired - Fee Related CN101972842B (en) | 2010-10-29 | 2010-10-29 | Sealed centrifugal casting method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101972842B (en) |
| WO (1) | WO2012055245A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972842B (en) * | 2010-10-29 | 2012-09-19 | 广州唯科得复合金属科技有限公司 | Sealed centrifugal casting method |
| FR3068271B1 (en) | 2017-06-29 | 2021-12-10 | Safran Aircraft Engines | FOUNDRY PROCESS WITH HOT MOLD CASTING |
| CN110153391A (en) * | 2019-05-23 | 2019-08-23 | 嘉兴铸工智能设备有限公司 | A kind of centrifugal casting technique of centrifugal casting machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU626877A1 (en) * | 1977-04-15 | 1978-10-05 | Институт Проблем Литья Ан Украинской Ссср | Centrifugal casting machine with vertical axle of rotation |
| CN1129493C (en) * | 2000-04-19 | 2003-12-03 | 佛曼德尔及伯吉有限公司 | Method and device for synchronous casting |
| CN101722289A (en) * | 2008-11-01 | 2010-06-09 | 吴为国 | Vacuum centrifugal casting machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE300284B (en) * | 1966-10-17 | 1968-04-22 | Goetaverken Ab | |
| CN87207819U (en) * | 1987-05-07 | 1988-10-05 | 机械委郑州机械研究所 | Enclosed centrifugal casting machine |
| CN201592141U (en) * | 2009-11-19 | 2010-09-29 | 龙吉林 | Vacuum centrifuge |
| CN101972842B (en) * | 2010-10-29 | 2012-09-19 | 广州唯科得复合金属科技有限公司 | Sealed centrifugal casting method |
-
2010
- 2010-10-29 CN CN201010527126A patent/CN101972842B/en not_active Expired - Fee Related
-
2011
- 2011-06-13 WO PCT/CN2011/075658 patent/WO2012055245A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU626877A1 (en) * | 1977-04-15 | 1978-10-05 | Институт Проблем Литья Ан Украинской Ссср | Centrifugal casting machine with vertical axle of rotation |
| CN1129493C (en) * | 2000-04-19 | 2003-12-03 | 佛曼德尔及伯吉有限公司 | Method and device for synchronous casting |
| CN101722289A (en) * | 2008-11-01 | 2010-06-09 | 吴为国 | Vacuum centrifugal casting machine |
Non-Patent Citations (1)
| Title |
|---|
| 苏义详等."铜合金金属型覆砂离心铸造工艺".《铸造》.2006,第55卷(第8期),第781页. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101972842A (en) | 2011-02-16 |
| WO2012055245A1 (en) | 2012-05-03 |
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Granted publication date: 20120919 Termination date: 20161029 |