CN107855484A - The pneumatic gun spraying casting technique of cylinder sleeve - Google Patents
The pneumatic gun spraying casting technique of cylinder sleeve Download PDFInfo
- Publication number
- CN107855484A CN107855484A CN201711203707.2A CN201711203707A CN107855484A CN 107855484 A CN107855484 A CN 107855484A CN 201711203707 A CN201711203707 A CN 201711203707A CN 107855484 A CN107855484 A CN 107855484A
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- China
- Prior art keywords
- iron
- cylinder sleeve
- molten iron
- sand mold
- temperature
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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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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- 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
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of pneumatic gun of cylinder sleeve to spray casting technique, it is characterised in that：Comprise the following steps：(1) it is, iron filings 58 60 according to proportioning, steel scrap 29 33, scrap iron 5.7 6.3, silvery pig iron 79, ferrosilicon 0.7 0.9, ferro-boron 0.08 0.09, copper 0.59 0.65 preparation raw material；Smelting temperature is used as 1,600 1760 DEG C of progress meltings, 1,550 1600 DEG C of molten iron temperature of coming out of the stove；Therebetween, when molten iron temperature is up to 1,380 1450 DEG C, sampling carries out spectrum analysis, detects chemical analysis by spectroanalysis instrument, is adjusted in time, assays chemical analysis, the molten steel quality of molten iron.It is of the invention to cancel a kind of original painting upper manually and both ends asbestos pad, both ends asbestos pad is saved, and spraying can guarantee that thickness, the uniformity of coating.
Description
Technical field
The invention belongs to casting technology field, and in particular to a kind of pneumatic gun spraying casting technique of cylinder sleeve.
Background technology
Casting is a kind of ancient manufacture method, and with the development of industrial technology, the quality for casting heavy castings directly affects
The quality of product, therefore, is cast in machinery manufacturing industry and occupies an important position, current casting technique, which generally comprises, to be made
Type, cast, cooling and knockout, effect of the molding sand in Foundry Production is particularly important, and common molding sand is mainly by roughing sand, bonding
Agent, water and coal dust etc. form, and it tends not to have the above-mentioned requirement to molding sand well, because of the poor quality of molding sand
Casting wasted product caused by and accounts for the 30~50% of the total waste product of casting, and manufactured finished product cast hardness is inadequate, not only casting process
It is more, production capacity is influenceed, while the precision of casting can not be effectively ensured, percent defective is higher, and engine is conventional Machinery Ministry
Part, at present, increasingly deficient with the energy and raw material problems, the development of the demand of engine to high-power small size direction,
Cylinder is engine core part, is gas compression, the space of burning expansion, be piston movement be oriented to track thus to cylinder
The mechanical property requirements of set are very high, simultaneously because environmental requirement is increasingly harsh, energy-saving and emission-reduction turn into the emphasis of Engine Industry
Research topic, the cylinder liner material and casting process of traditional idea can not meet new technical requirements, the metallographic structure of cylinder jacket,
Graphite form can not reach requirement, and the low intensity of cylinder jacket, anti-wear performance are poor, service life is short, processing characteristics is also poor, therefore set
Count a kind of process rationally, save material, pour into a mould uniform, simple to operate, working stability, production efficiency are high, product qualification rate is high,
The good cylinder liner casting technology of Forming Quality is necessary, and has for the production efficiency and service life for improving cylinder jacket
Play the role of important.
The content of the invention
The defects of the object of the invention is exactly to make up prior art, there is provided a kind of to cancel a kind of original painting upper manually and two
Asbestos pad is held, has saved both ends asbestos pad, and spraying can guarantee that thickness, the uniformity of coating.Secondly, more than the outer member of cylinder liner blank
Amount reduces 3-4mm on the basis of original, every reduction 0.8-1.0kg of weight average of blank, substantially increases molten iron profit
Casting technique is sprayed with the pneumatic gun of the cylinder sleeve of rate.
The present invention is achieved by the following technical solutions：
A kind of pneumatic gun spraying casting technique of cylinder sleeve, it is characterised in that：Comprise the following steps：
(1) it is, iron filings 58-60 according to proportioning, steel scrap 29-33, scrap iron 5.7-6.3, silvery pig iron 7-9, ferrosilicon 0.7-0.9, boron
Iron 0.08-0.09, copper 0.59-0.65 prepare raw material；Smelting temperature is used as 1600-1760 DEG C of progress melting, molten iron temperature of coming out of the stove
1550-1600 DEG C of degree；Therebetween, when molten iron temperature reaches 1380-1450 DEG C, sampling carries out spectrum analysis, passes through spectroanalysis instrument
Chemical analysis is detected, is adjusted in time, assays chemical analysis, the molten steel quality of molten iron；
(2) precoated sand mold and by cylinder sleeve design size is made, precoated sand is loaded in precoated sand mold, is sent to baking kiln
Interior sinter molding, and furane resins, resin 30-60 mixed curing agents that parts by weight are 1.55-1.75 are equipped with, dry the sintering temperature of kiln
Spend for 280~300 DEG C；The precoated sand mold after sinter molding is taken out, fireproof coating is brushed in the inner chamber of precoated sand mold；
(3), cylinder sleeve sand mold is installed on centrifugal casting machine, sand mold is loaded in cylinder sleeve metal loose tool, passes through air pressure
Rifle sprays into chill coating in die sleeve and both ends, cancel it is original it is a kind of it is upper manually apply and both ends asbestos pad, saved both ends stone
Cotton pad, and spraying can guarantee that thickness, the uniformity of coating, start centrifugal casting machine rotation, rotating speed is 1100~1300 revs/min,
Molten iron is poured in the 5-15 seconds, molten iron starts the cooling that discharges water after having poured the 5-10 seconds, stops when temperature is down to 600-700 DEG C in mould
Discharge water, shut down after waiting the 40-70 seconds；Decelerator is opened, makes blank depanning；
The fireproof coating is mixed by the recessed native 10-11 of lithium base, organoclay 2-3, fire resisting lead powder 8-9.
The chill coating is by silica flour 50-70, bentonite 10-13, lead powder 11-14, diatomite 4-6, waterglass 4-7
It is mixed.
It is of the invention to cancel a kind of original painting upper manually and both ends asbestos pad, both ends asbestos pad is saved, and spraying can guarantee that
The thickness of coating, the uniformity.Secondly, outer first surplus of cylinder liner blank reduces 3-4mm, the weight of blank on the basis of original
Average every reduction 0.8-1.0kg, substantially increases molten iron utilization rate, the process cost of this technique is low, it is easy to accomplish industrialization
Production, strengthen wearability, make that the metallographic of cylinder jacket matrix is form compact and stable, hardness suitably increases, tensile strength significantly improves,
Yield rate improves, while casting technique is stable while also allows for operating, and heat endurance is good, and flow is simple.
Embodiment
A kind of pneumatic gun spraying casting technique of cylinder sleeve, it is characterised in that：Comprise the following steps：
(1) it is, iron filings 58-60 according to proportioning, steel scrap 29-33, scrap iron 5.7-6.3, silvery pig iron 7-9, ferrosilicon 0.7-0.9, boron
Iron 0.08-0.09, copper 0.59-0.65 prepare raw material；Smelting temperature is used as 1600-1760 DEG C of progress melting, molten iron temperature of coming out of the stove
1550-1600 DEG C of degree；Therebetween, when molten iron temperature reaches 1380-1450 DEG C, sampling carries out spectrum analysis, passes through spectroanalysis instrument
Chemical analysis is detected, is adjusted in time, assays chemical analysis, the molten steel quality of molten iron；
(2) precoated sand mold and by cylinder sleeve design size is made, precoated sand is loaded in precoated sand mold, is sent to baking kiln
Interior sinter molding, and furane resins, resin 30-60 mixed curing agents that parts by weight are 1.55-1.75 are equipped with, dry the sintering temperature of kiln
Spend for 280~300 DEG C；The precoated sand mold after sinter molding is taken out, fireproof coating is brushed in the inner chamber of precoated sand mold；
(3), cylinder sleeve sand mold is installed on centrifugal casting machine, sand mold is loaded in cylinder sleeve metal loose tool, passes through air pressure
Rifle sprays into chill coating in die sleeve and both ends, cancel it is original it is a kind of it is upper manually apply and both ends asbestos pad, saved both ends stone
Cotton pad, and spraying can guarantee that thickness, the uniformity of coating, start centrifugal casting machine rotation, rotating speed is 1100~1300 revs/min,
Molten iron is poured in the 5-15 seconds, molten iron starts the cooling that discharges water after having poured the 5-10 seconds, stops when temperature is down to 600-700 DEG C in mould
Discharge water, shut down after waiting the 40-70 seconds；Decelerator is opened, makes blank depanning；
The fireproof coating is mixed by the recessed native 10-11 of lithium base, organoclay 2-3, fire resisting lead powder 8-9.
The chill coating is by silica flour 50-70, bentonite 10-13, lead powder 11-14, diatomite 4-6, waterglass 4-7
It is mixed.
Claims (3)
- A kind of 1. pneumatic gun spraying casting technique of cylinder sleeve, it is characterised in that：Comprise the following steps：(1) it is, iron filings 58-60 according to proportioning, steel scrap 29-33, scrap iron 5.7-6.3, silvery pig iron 7-9, ferrosilicon 0.7-0.9, boron Iron 0.08-0.09, copper 0.59-0.65 prepare raw material；Smelting temperature is used as 1600-1760 DEG C of progress melting, molten iron temperature of coming out of the stove 1550-1600 DEG C of degree；Therebetween, when molten iron temperature reaches 1380-1450 DEG C, sampling carries out spectrum analysis, passes through spectroanalysis instrument Chemical analysis is detected, is adjusted in time, assays chemical analysis, the molten steel quality of molten iron；(2) precoated sand mold and by cylinder sleeve design size is made, precoated sand is loaded in precoated sand mold, is sent to baking kiln Interior sinter molding, and furane resins, resin 30-60 mixed curing agents that parts by weight are 1.55-1.75 are equipped with, dry the sintering temperature of kiln Spend for 280~300 DEG C；The precoated sand mold after sinter molding is taken out, fireproof coating is brushed in the inner chamber of precoated sand mold；(3), cylinder sleeve sand mold is installed on centrifugal casting machine, sand mold is loaded in cylinder sleeve metal loose tool, passes through air pressure Rifle sprays into chill coating in die sleeve and both ends, cancel it is original it is a kind of it is upper manually apply and both ends asbestos pad, saved both ends stone Cotton pad, and spraying can guarantee that thickness, the uniformity of coating, start centrifugal casting machine rotation, rotating speed is 1100~1300 revs/min, Molten iron is poured in the 5-15 seconds, molten iron starts the cooling that discharges water after having poured the 5-10 seconds, stops when temperature is down to 600-700 DEG C in mould Discharge water, shut down after waiting the 40-70 seconds；Decelerator is opened, makes blank depanning.
- 2. the pneumatic gun spraying casting technique of cylinder sleeve as claimed in claim 1, it is characterised in that：The fireproof coating is recessed by lithium base Native 10-11, organoclay 2-3, fire resisting lead powder 8-9 are mixed.
- 3. the pneumatic gun spraying casting technique of cylinder sleeve as claimed in claim 1, it is characterised in that：The chill coating is by quartz Powder 50-70, bentonite 10-13, lead powder 11-14, diatomite 4-6, waterglass 4-7 are mixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711203707.2A CN107855484A (en) | 2017-11-27 | 2017-11-27 | The pneumatic gun spraying casting technique of cylinder sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711203707.2A CN107855484A (en) | 2017-11-27 | 2017-11-27 | The pneumatic gun spraying casting technique of cylinder sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107855484A true CN107855484A (en) | 2018-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711203707.2A Pending CN107855484A (en) | 2017-11-27 | 2017-11-27 | The pneumatic gun spraying casting technique of cylinder sleeve |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101569923A (en) * | 2008-04-29 | 2009-11-04 | 胡富玲 | Production method for casting cylinder liner blank for ammonia refrigerator by adopting precoated sand molding |
| CN102211162A (en) * | 2011-05-27 | 2011-10-12 | 大连滨城活塞制造有限公司 | Processing technology for drilled and cooled cylinder liner |
| CN102756094A (en) * | 2011-04-27 | 2012-10-31 | 陆宝庆 | Casting process for cylinder sleeves |
| CN103008529A (en) * | 2012-11-22 | 2013-04-03 | 大连滨城活塞制造有限公司 | Metal mold paint for centrifugal casting of cylinder sleeve |
| CN103361538A (en) * | 2013-07-18 | 2013-10-23 | 江苏爱吉斯海珠机械有限公司 | Cylinder sleeve alloy cast iron medium-frequency induction furnace melting method and centrifugal casting method |
| CN204075117U (en) * | 2014-08-29 | 2015-01-07 | 福建汇华集团东南汽车缸套有限公司 | A kind of cylinder sleeve centrifugal casting is without mat insulation baffle plate |
-
2017
- 2017-11-27 CN CN201711203707.2A patent/CN107855484A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101569923A (en) * | 2008-04-29 | 2009-11-04 | 胡富玲 | Production method for casting cylinder liner blank for ammonia refrigerator by adopting precoated sand molding |
| CN102756094A (en) * | 2011-04-27 | 2012-10-31 | 陆宝庆 | Casting process for cylinder sleeves |
| CN102211162A (en) * | 2011-05-27 | 2011-10-12 | 大连滨城活塞制造有限公司 | Processing technology for drilled and cooled cylinder liner |
| CN103008529A (en) * | 2012-11-22 | 2013-04-03 | 大连滨城活塞制造有限公司 | Metal mold paint for centrifugal casting of cylinder sleeve |
| CN103361538A (en) * | 2013-07-18 | 2013-10-23 | 江苏爱吉斯海珠机械有限公司 | Cylinder sleeve alloy cast iron medium-frequency induction furnace melting method and centrifugal casting method |
| CN204075117U (en) * | 2014-08-29 | 2015-01-07 | 福建汇华集团东南汽车缸套有限公司 | A kind of cylinder sleeve centrifugal casting is without mat insulation baffle plate |
Non-Patent Citations (1)
| Title |
|---|
| 高浩: "气缸套毛坯无绝热垫离心铸造的研究", 《内燃机与配件》 * |
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Application publication date: 20180330 |
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