CN103128252A - Method of casting thick-wall casting through sand insulation cold iron - Google Patents
Method of casting thick-wall casting through sand insulation cold iron Download PDFInfo
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- CN103128252A CN103128252A CN2012102656321A CN201210265632A CN103128252A CN 103128252 A CN103128252 A CN 103128252A CN 2012102656321 A CN2012102656321 A CN 2012102656321A CN 201210265632 A CN201210265632 A CN 201210265632A CN 103128252 A CN103128252 A CN 103128252A
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Abstract
The invention relates to a casting method of a thick-wall casting, in particular to a method of casting the thick-wall casting through sand insulation cold iron. The method sequentially comprises mould manufacturing, modeling, core manufacturing, mould assembling, pouring and falling sand cleaning. The method is characterized in that the sand insulation cold iron is placed on a thermal center portion, namely the thick portion of the casting before modeling, a boss of the sand insulation cold iron is used for fixation, and the boss of the sand insulation cold iron is placed close to a casting format of the casting. After the sand insulation cold iron is placed, quicksand is conducted, comprehensive tiny compaction of moulding sand is conducted through a vibration ramming platform, the mould is opened after being placed for two hours, and after mould assembling, iron liquid after nodulizing inoculation is poured into the mould. The method is unique in technique, can guarantee quality of the casting, shortens the production period, improves production efficiency, and saves production cost. The method not only saves the production cost, but also reduces casting surface cleaning work and work intensity.
Description
Technical field
The present invention relates to a kind of casting method of thick-walled casting, especially relate to a kind of utilization every the method for sand cooling iron casting thick-walled casting.
Background technology
The minimum 40mm of the wall thickness of foundry goods, maximum 180mm, main wall thickness has reached 80mm.Belong to thickness large section ball iron piece, because section is excessive, cooling velocity is slow, thus setting time is long, in foundry goods, especially wall thickness center or thermal center place are prone to graphite morphology, graphite floatation, decaying spheroidisation.The direct-cooled chill of the general employing of the thick large part of foundry goods is forced cooling, to reach the purpose of foundry goods consecutive solidification, eliminates the Shinkage and dispersed porosity of foundry goods inside.The direct-cooled chill of a large amount of use is forced cooling to foundry goods, chill is because quantity is many, and weight is large, operator's inconvenient operation, and also chill is not easy the consolidation casting mold more.When foundry goods was produced in enormous quantities, chill was the key factor that affects production efficiency.Foundry goods uses the chill of about 50 ~ 70 90*90*100, and chill can only recycle three times, is equivalent to the production cost of chill of every greatly about 1500 ~ 2000 yuan.Not only the castings production cost is high, and the trace of the direct-cooled chill of later stage reconditioning on foundry goods wasted time and energy.Use the chill vestige of direct-cooled chill reconditioning cast(ing) surface to need the skilled polishing work cost time of 2 days of growing up to go reconditioning, use every sand cooling iron on foundry goods, reduced by 2 days reconditioning time.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of process unique, can guarantee casting quality, shorten the production cycle, enhance productivity, save production cost, both saved production cost, reduced again a kind of utilization of the cleaning work of cast(ing) surface and labour intensity every the method for sand cooling iron casting thick-walled casting.
In order to realize goal of the invention, the present invention realizes in the following way:
a kind of method of using every sand cooling iron casting thick-walled casting, the method is followed successively by Mold Making, moulding, coremaking, mould assembling, cast and peeling, it is characterized in that: will be placed on the thick large part that heat energy-saving position is foundry goods every sand cooling iron before moulding, then use every the boss of sand cooling iron and fix, boss on sand cooling iron is placed near the cast pattern of foundry goods, make every three boss of sand cooling iron all close with apperance, placed after sand cooling iron, quicksand, use rectangular plank to carry out tamping to the layer of sand between the cast pattern of chill and foundry goods, use the vibration ramming platform to carry out comprehensive little consolidation to molding sand, vibration frequency 50HZ, real 30 seconds of microseism, place after 2 hours and unpack, after mould assembling, iron liquid after spheroidization and inoculation is poured in casting mold get final product,
Described shape every sand cooling iron is similar to the shape of the foundry goods of casting, and described volume ratio foundry goods every sand cooling iron is placed large 1～1.5 times of the volume at chill position, is 60～90mm every the thickness of sand cooling iron, and the cast pattern thickness of chill is 60～90mm;
Described material every sand cooling iron is Korean pine wood, and the annular hanger of 3～5 100 is being arranged on the arc end face of sand cooling iron, is being evenly equipped with 3～6 boss every sand cooling iron end face both core iron near the one side every sand cooling iron;
Described boss is long 20mm～45mm, wide 20mm～50mm, thick 25～30mm;
It is described that what use every sand cooling iron is the scrap iron liquid cast of electric furnace, sintering electric furnace of tiing a knot on electric furnace.
The present invention has following effect:
1) process is unique: method provided by the invention is that the method is followed successively by Mold Making, moulding, coremaking, mould assembling, cast and peeling, it is characterized in that: will be placed on the thick large part that heat energy-saving position is foundry goods every sand cooling iron before moulding, then use every the boss of sand cooling iron and fix, boss on sand cooling iron is placed near the cast pattern of foundry goods, make every three boss of sand cooling iron all close with apperance, placed after sand cooling iron, quicksand, use rectangular plank to carry out tamping to the layer of sand between the cast pattern of chill and foundry goods, use the vibration ramming platform to carry out comprehensive little consolidation to molding sand, vibration frequency 50HZ, real 30 seconds of microseism, place after 2 hours and unpack, after mould assembling, iron liquid after spheroidization and inoculation is poured in casting mold get final product.
2) can guarantee casting quality: method provided by the invention is mainly for the production of thick-walled casting, and product mainly has following characteristics: the foundry goods ratio of height to diameter is 3～6, and foundry goods main body wall thickness is greater than 40mm, and the wall thickness transition of foundry goods is greatly different.The present invention is applicable to the revolving body foundry goods, and the foundry goods ratio of height to diameter is 3 ~ 6.Axle class casting structure is relatively simple, but wall thickness change is large, thickest 165mm, and minimum wall thickness (MINI W.) 80mm, casting weight are 4000 ~ 8000kg.Foundry goods is except general basic demand, and material meets EN-GJS-400-18U-LT, size and reaches the B1 that GB/T6414-1999 CT10 level, surface quality do not allow ISO11971-1997 or EN12454-1998 regulation, C2, D1, E3, F1, the possibility blemish of J1 and following grade thereof.The foundry goods key is check appointed area UT2 level, the MT3 level of inherent quality; Other regional UT3 level.Play every sand cooling iron and strengthen the molding sand heat radiation, thereby it is cooling to strengthen foundry goods, the casting solidification time is shortened greatly, thereby prevent fading and nodular graphite degeneration, improves graphite nodule roundness and nodule number, and then improve mechanical performance.Avoided due to direct-cooled chill sub-cooled cast(ing) surface the phenomenon that causes surperficial structure of cast iron to destroy; Foundry goods uses after sand cooling iron, satisfy fully foundry goods on top, the flange position of middle part, bottom do not reach the UT2 level, other regional UT3 level, the inherent quality requirement of MT3 level.
3) reduced the production cost of direct-cooled chill: the present invention adopts every the sand cooling iron process, places because chill is convenient, does not need operating personnel to remove to control position and the height of chill; Reduce simultaneously about 40～60 direct-cooled chills, be easy to operate, reduced labour intensity, improved moulding efficient, and reduced the production cost of direct-cooled chill.
6) shorten the production cycle, enhance productivity: the present invention uses the chill vestige of direct-cooled chill reconditioning cast(ing) surface to need the skilled polishing work cost time of 2 days of growing up to go reconditioning, use every sand cooling iron on foundry goods, reduced the use of direct-cooled chill, reduced by 2 days reconditioning time.Adopt the removing surface efficient that makes foundry goods and improved 45%, improved simultaneously the surface quality of foundry goods.
Description of drawings
Fig. 1 is that the present invention is every the structural representation of sand cooling iron;
Fig. 2 is that the present invention is every the structural representation of sand cooling iron and foundry goods assembling.
The specific embodiment
a kind of method of using every sand cooling iron casting thick-walled casting, the method is followed successively by Mold Making, moulding, coremaking, mould assembling, cast and peeling, as shown in Figure 2: will be placed on the thick large part that heat energy-saving position is foundry goods 2 every sand cooling iron 1 before moulding, then use every the boss of sand cooling iron and fix, boss on sand cooling iron is placed near the cast pattern of foundry goods, make every three boss of sand cooling iron all close with apperance, placed after sand cooling iron, quicksand, use rectangular plank to carry out tamping to the layer of sand between the cast pattern of chill and foundry goods, use the vibration ramming platform to carry out comprehensive little consolidation to molding sand, vibration frequency 50HZ, real 30 seconds of microseism, place after 2 hours and unpack, after mould assembling, iron liquid after spheroidization and inoculation is poured in casting mold get final product.
As shown in Figure 1: described shape every sand cooling iron is similar to the shape of the foundry goods of casting, described volume ratio foundry goods every sand cooling iron is placed large 1～1.5 times of the volume at chill position, thickness every sand cooling iron is 60～90mm, and the cast pattern thickness of chill is 60～90mm.
Described material every sand cooling iron is Korean pine wood, and the annular hanger of 3～5 100 is being arranged on the arc end face of sand cooling iron, is being evenly equipped with 3～6 boss every sand cooling iron end face both core iron near the one side every sand cooling iron.
Described boss is long 20mm～45mm, wide 20mm～50mm, thick 25～30mm.
It is described that what use every sand cooling iron is the scrap iron liquid cast of electric furnace, sintering electric furnace of tiing a knot on electric furnace.
Claims (5)
1. a utilization is every the method for sand cooling iron casting thick-walled casting, the method is followed successively by Mold Making, moulding, coremaking, mould assembling, cast and peeling, it is characterized in that: will be placed on the thick large part that heat energy-saving position is foundry goods every sand cooling iron before moulding, then use every the boss of sand cooling iron and fix, boss on sand cooling iron is placed near cast pattern, make every three boss of sand cooling iron all close with apperance, placed after sand cooling iron, quicksand, use rectangular plank to carry out tamping to the layer of sand between the cast pattern of chill and foundry goods, use the vibration ramming platform to carry out comprehensive little consolidation to molding sand, vibration frequency 50HZ, real 30 seconds of microseism, place after 2 hours and unpack, after mould assembling, iron liquid after spheroidization and inoculation is poured in casting mold get final product.
2. a kind of utilization as claimed in claim 1 is every the method for sand cooling iron casting thick-walled casting, it is characterized in that: described shape every sand cooling iron is similar to the shape of the foundry goods of casting, described volume ratio foundry goods every sand cooling iron is placed large 1～1.5 times of the volume at chill position, thickness every sand cooling iron is 60～90mm, and the cast pattern thickness of chill is 60～90mm.
3. a kind of utilization as claimed in claim 2 is every the method for sand cooling iron casting thick-walled casting, it is characterized in that: described material every sand cooling iron is Korean pine wood, the annular hanger of 3～5 100 is arranged at the arc end face every sand cooling iron, be evenly equipped with 3～6 boss every sand cooling iron end face both core iron near the one side every sand cooling iron.
4. a kind of utilization as claimed in claim 3 every the method for sand cooling iron casting thick-walled casting, is characterized in that: described boss is long 20mm～45mm, wide 20mm～50mm, thick 25～30mm.
5. a kind of method of using every sand cooling iron casting thick-walled casting as claimed in claim 2 is characterized in that: described what use every sand cooling iron is the scrap iron liquid cast of electric furnace, sintering electric furnace of tiing a knot on electric furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210265632.1A CN103128252B (en) | 2012-07-27 | 2012-07-27 | Method of casting thick-wall casting through sand insulation cold iron |
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| CN201210265632.1A CN103128252B (en) | 2012-07-27 | 2012-07-27 | Method of casting thick-wall casting through sand insulation cold iron |
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| CN103128252A true CN103128252A (en) | 2013-06-05 |
| CN103128252B CN103128252B (en) | 2015-05-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107150106A (en) * | 2017-06-29 | 2017-09-12 | 大连金河铸造有限公司 | Improve the casting technique and prefabricated sand core structure of sand wedge angle position quality |
| CN107297486A (en) * | 2017-06-30 | 2017-10-27 | 共享装备股份有限公司 | A kind of set-up mode every sand cooling iron |
| CN107537996A (en) * | 2016-06-27 | 2018-01-05 | 科华控股股份有限公司 | It is a kind of to prevent casting Quench position from producing stomata and covering sand cooling iron construction |
| 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 |
| CN115351258A (en) * | 2022-07-25 | 2022-11-18 | 哈尔滨理工大学 | Cooling water pipe embedded type chilling block and casting method and application thereof |
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| JP2003311371A (en) * | 2002-04-26 | 2003-11-05 | Hiroshima Aluminum Industry Co Ltd | Method for casting vacuum chamber into sand mold |
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| CN101618426A (en) * | 2009-07-25 | 2010-01-06 | 宁波明灵机械有限公司 | Method for casting main shaft casts of stators in aerogenerators |
| CN101618425A (en) * | 2009-07-25 | 2010-01-06 | 日月重工股份有限公司 | Method for casting rotary axis casts of aerogenerators |
| CN201880859U (en) * | 2010-11-27 | 2011-06-29 | 大连远景铸造有限公司 | Green sand molding mould for heavy hydraulic castings |
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| CN202316927U (en) * | 2011-12-08 | 2012-07-11 | 济南重工股份有限公司 | Device for casting large half gears |
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| JPS61129253A (en) * | 1984-11-27 | 1986-06-17 | Komatsu Ltd | Modeling method of casting shape |
| JP2003311371A (en) * | 2002-04-26 | 2003-11-05 | Hiroshima Aluminum Industry Co Ltd | Method for casting vacuum chamber into sand mold |
| CN101081432A (en) * | 2007-06-04 | 2007-12-05 | 天乾（无锡）科技有限公司 | Method for founding main regulation valve body of steam turbine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107537996A (en) * | 2016-06-27 | 2018-01-05 | 科华控股股份有限公司 | It is a kind of to prevent casting Quench position from producing stomata and covering sand cooling iron construction |
| CN107150106A (en) * | 2017-06-29 | 2017-09-12 | 大连金河铸造有限公司 | Improve the casting technique and prefabricated sand core structure of sand wedge angle position quality |
| CN107150106B (en) * | 2017-06-29 | 2024-04-16 | 大连金河铸造有限公司 | Casting process for improving quality of sand sharp corner part and prefabricated sand core structure |
| CN107297486A (en) * | 2017-06-30 | 2017-10-27 | 共享装备股份有限公司 | A kind of set-up mode every sand cooling iron |
| 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 |
| CN115351258A (en) * | 2022-07-25 | 2022-11-18 | 哈尔滨理工大学 | Cooling water pipe embedded type chilling block and casting method and application thereof |
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| CN103128252B (en) | 2015-05-13 |
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Effective date of registration: 20160517 Address after: Beijing road 750021 the Ningxia Hui Autonomous Region Yinchuan City Xixia District No. 550 Patentee after: KOCEL EQUIPMENT CO., LTD. Address before: 750021 the Ningxia Hui Autonomous Region Yinchuan Xixia concentric Street No. 199 Patentee before: Ningxia Gongxiang Group Co., Ltd. Patentee before: KOCEL Machinery Co., Ltd. |