CN104826999B - The method that a kind of ultra-thin core of heavy combustion engine compressor air-discharging cylinder casting prevents scab - Google Patents
The method that a kind of ultra-thin core of heavy combustion engine compressor air-discharging cylinder casting prevents scab Download PDFInfo
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- CN104826999B CN104826999B CN201510202824.1A CN201510202824A CN104826999B CN 104826999 B CN104826999 B CN 104826999B CN 201510202824 A CN201510202824 A CN 201510202824A CN 104826999 B CN104826999 B CN 104826999B
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Abstract
The present invention relates to the method that a kind of ultra-thin core of heavy combustion engine compressor air-discharging cylinder casting prevents scab, comprise the following steps：1) according to the shape of the gas outlet of exhaust cylinder body, die model is made；2) real with zircon sand Chong in the position of gas outlet, during Chong sand, each position, fully Chong is real, does not interspace, and remaining position outside gas outlet is real with chrome ore Chong, completes the making of gas outlet fuse；3) fuse of gas outlet is fixed in big fuse, one removes in the sand mold of crust；4) after cast terminates, sand removal processing is carried out.Advantage is：Chrome ore is replaced using zircon sand, gas port fuse is got with zircon sand, gas outlet intensity can be ensured with zircon sand, meanwhile, it can prevent from producing scab, the phenomenon of drop after casting, surface quality is good, and size is accurate.One-step casting shaping is realized, cost and production cycle is reduced.
Description
Technical field
GE oil gas gas compressor exhaust casing casting methods, more particularly to a kind of heavy combustion engine are produced the present invention relates to one kind
The method that the ultra-thin core of compressor air-discharging cylinder casting prevents scab.
Background technology
With developing rapidly for science and technology, gas turbine is advantageous power source, it provide cleaning, it is quiet with efficiently
Power, for generating electricity, aircraft promoted with peculiar to vessel, and gas pipeline pumping plant power etc..Small size gas turbine has its special ground
, in the small-sized combustion engine used, there is the auxiliary propulsion plant as aircraft position, it provides starting power for sustainer；And
Pneumatic and hydraulic system power is provided；The main power source of stand-by power supply and ground handling when taking off；It is also used for land power plant for emergency.
See Fig. 1, the structure of small-sized exhaust casing is sufficiently complex, belongs to thin-wall construction, and die cavity is very narrow.In production exhaust casing
The volume of body is 0.14m3, it is minimum cylinder block in similar exhaust cylinder body.Need in so small exhaust cylinder body
The making of gas port.Gas outlet is exhaust cylinder body exhaust position, and the characteristics of its is main is a thin-walled ring body.Its performance requirement and table
Face smoothness requirements are especially high, and it is all that its casting is after death carried out digital control processing by being machined factory typically to produce this position, should be added
There is location difficulty, the low shortcoming of machining precision in work mode.Simultaneously as the volume and quality of this product are very small, exhaust
The position of mouth is only 20-30mm.Machining can not meet requirement at all, so can only once cast out vent position, cast
The quality of casting should be ensured after going out, also to ensure the requirement of the finish of outlet surface.If using secondary casting outlet
Mouthful, then it can not meet the quality requirements such as the dynamics of gas outlet.Therefore gas outlet makes extremely difficult, it is desirable to the shape of fuse
Very thin, the intensity of sand will meet the temperature of molten steel, and drop is unable in the event of high temperatures and is become to dredge.
The content of the invention
It is super it is an object of the invention to provide a kind of heavy combustion engine compressor air-discharging cylinder casting to overcome the deficiencies in the prior art
The method that thin core prevents scab, realize that one-step casting is molded, and prevent under molten steel high temperature action, scab, drop phenomenon
Occur.
To achieve the above object, the present invention is achieved through the following technical solutions：
The method that a kind of ultra-thin core of heavy combustion engine compressor air-discharging cylinder casting prevents scab, comprises the following steps：
1) according to the shape of the gas outlet of exhaust cylinder body, die model is made；
2) real with zircon sand Chong in the position of gas outlet, during Chong sand, each position, fully Chong is real, does not stay
Space, remaining position outside gas outlet is real with chrome ore Chong, completes the making of gas outlet fuse；
3) fuse of gas outlet is fixed in big fuse, one removes in the sand mold of crust；
4) after cast terminates, sand removal processing is carried out.
Described gas outlet thickness δ is 20-30mm.
Compared with prior art, the beneficial effects of the invention are as follows：
Chrome ore is replaced using zircon sand, gas port fuse is got with zircon sand, can ensure that gas outlet is strong with zircon sand
Degree, meanwhile, it can prevent from producing scab, the phenomenon of drop after casting, surface quality is good, and size is accurate.Realize one-step casting
Shaping, reduces cost and production cycle.
Brief description of the drawings
Fig. 1 is exhaust casing structural representation.
Fig. 2 is gas outlet structural representation.
In figure：1- exhaust casing 2- gas outlets.
Embodiment
The present invention is described in detail with reference to Figure of description, it should be noted that the implementation of the present invention is not limited
In following embodiment.
See Fig. 2, the method that a kind of ultra-thin core of heavy combustion engine compressor air-discharging cylinder casting prevents scab, including following step
Suddenly：
1) according to the shape of the gas outlet of exhaust cylinder body, die model is made；The structure of die model, shape, size, surface it is coarse
Degree must reach requirement；
2) real with zircon sand Chong in the position of gas outlet, during Chong sand, each position, fully Chong is real, does not stay
Space, remaining position outside gas outlet is real with chrome ore Chong, completes the making of gas outlet fuse；
3) fuse of gas outlet is fixed in big fuse, one removes in the sand mold of crust；
4) after cast terminates, sand removal processing is carried out in the position of gas outlet, gas outlet has reached any surface finish, dimensional accuracy
High requirement.
Wherein, thickness δ in gas outlet is 20-30mm.
Zircon sand is the primary raw material for producing zirconium, hafnium and a variety of zirconium products, with fusing point is high, thermal conductivity is low, line expansion system
The features such as number is small, is widely used in the industries such as metallurgical, casting.Zircon sand is prior art as the formula of fuse, be will not be described here.
The gas outlet of exhaust casing is excessively narrow, and to ensure the intensity of sand, we replace chrome ore at selection with zircon sand,
Fuse is beaten with zircon sand, in gas outlet position with zircon sand come proof strength, remaining uses chrome ore.The fuse of gas outlet is consolidated
It is scheduled in big fuse, one removes in the sand mold of crust.
Claims (1)
1. the method that a kind of ultra-thin core of heavy combustion engine compressor air-discharging cylinder casting prevents scab, it is characterised in that for producing
Volume is 0.14m3Exhaust cylinder body, comprise the following steps：
1) according to the shape of the gas outlet of exhaust cylinder body, die model is made；
2) real with zircon sand Chong in the position of gas outlet, during Chong sand, each position, fully Chong is real, does not leave a blank
Gap, remaining position outside gas outlet is real with chrome ore Chong, completes the making of gas outlet fuse；
3) fuse of gas outlet is fixed in big fuse, one removes in the sand mold of crust；
4) after cast terminates, sand removal processing is carried out；
Described gas outlet thickness δ is 20-30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510202824.1A CN104826999B (en) | 2015-04-24 | 2015-04-24 | The method that a kind of ultra-thin core of heavy combustion engine compressor air-discharging cylinder casting prevents scab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510202824.1A CN104826999B (en) | 2015-04-24 | 2015-04-24 | The method that a kind of ultra-thin core of heavy combustion engine compressor air-discharging cylinder casting prevents scab |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104826999A CN104826999A (en) | 2015-08-12 |
| CN104826999B true CN104826999B (en) | 2017-07-11 |
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| CN201510202824.1A Active CN104826999B (en) | 2015-04-24 | 2015-04-24 | The method that a kind of ultra-thin core of heavy combustion engine compressor air-discharging cylinder casting prevents scab |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106424581B (en) * | 2016-10-27 | 2018-07-24 | 宁夏共享模具有限公司 | The sand removal structure of 3D printing sand core |
| CN107138687B (en) * | 2017-04-20 | 2018-10-30 | 台州中茂机械有限公司 | A kind of moulding process of compresser cylinder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201136041Y (en) * | 2007-12-26 | 2008-10-22 | 广西玉柴机器股份有限公司 | Casting core for cylinder block |
| CN101722277A (en) * | 2009-12-11 | 2010-06-09 | 沪东重机有限公司 | Method for casting cylinder cover of low-speed diesel for large-bore vessel |
| CN102873271A (en) * | 2012-09-15 | 2013-01-16 | 山西晋城无烟煤矿业集团有限责任公司 | Core embedding casting method for middle trough casting |
| CN103418751A (en) * | 2013-09-03 | 2013-12-04 | 宁夏共享集团有限责任公司 | Method for controlling size of large gas turbine exhaust cylinder casting sand core |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6082246A (en) * | 1983-10-11 | 1985-05-10 | Mitsubishi Heavy Ind Ltd | Casting method of casting |
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2015
- 2015-04-24 CN CN201510202824.1A patent/CN104826999B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201136041Y (en) * | 2007-12-26 | 2008-10-22 | 广西玉柴机器股份有限公司 | Casting core for cylinder block |
| CN101722277A (en) * | 2009-12-11 | 2010-06-09 | 沪东重机有限公司 | Method for casting cylinder cover of low-speed diesel for large-bore vessel |
| CN102873271A (en) * | 2012-09-15 | 2013-01-16 | 山西晋城无烟煤矿业集团有限责任公司 | Core embedding casting method for middle trough casting |
| CN103418751A (en) * | 2013-09-03 | 2013-12-04 | 宁夏共享集团有限责任公司 | Method for controlling size of large gas turbine exhaust cylinder casting sand core |
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| CN104826999A (en) | 2015-08-12 |
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