CN102000771B - Casting method of grinding disc - Google Patents
Casting method of grinding disc Download PDFInfo
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- CN102000771B CN102000771B CN2010105923414A CN201010592341A CN102000771B CN 102000771 B CN102000771 B CN 102000771B CN 2010105923414 A CN2010105923414 A CN 2010105923414A CN 201010592341 A CN201010592341 A CN 201010592341A CN 102000771 B CN102000771 B CN 102000771B
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- loam core
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Abstract
The invention discloses a casting method of a grinding disc, comprising a forming process, a thermal treatment process and a pouring process. The casting method is characterized in that, in the forming process, a core assembly is utilized for forming, and the core assembly comprises an outer peel sand core (2); a bottom core (5) is arranged at the lower part of the outer peel sand core (2); a cover box sand core (1) is arranged at the upper part of the outer peel sand core (2); an inner cavity sand core (3) and a riser sand core (4) are sequentially arranged between the cover box sand core (1) and the bottom core (5); the outer peel sand core (2), the bottom core (5), the riser sand core (4), the inner cavity sand core (3) and the cover box sand core (1) form a hollow casting cavity (6) for accommodating the grinding disc. The invention fills the gap of batch production of the grinding discs, can ensure that the grinding disc satisfies the technical requirement, requires less molten steel during pouring, and has low production cost and high efficiency.
Description
Technical field
The present invention relates to casting technology field, particularly relate to a kind of casting method of cement equipment.
Background technology
Mill is the key component of cement equipment, 120 tons of foundry goods substances, 6150 millimeters of diameters; High 2320 millimeters; 130 millimeters of minimum wall thickness (MINI W.)s; 450 millimeters of thickests.
The technical quality of product requires as follows:
1) chemical composition (JIS G5101 SC450)
| The trade mark | C | Si | Mn | P | S |
| SC450 | 0.18～0.24 | 0.3-0.5 | ＜1.2 | ＜0.035 | ＜0.035 |
2) mechanical performance
| Tensile strength | Yield strength | Percentage elongation | The contraction percentage of area | Impact flexibility |
| N/mm2 | N/mm2 | ％ | ％ | J/cm2?at?20 |
| ≥450 | ≥225 | ≥22 | ≥30 | ≥39.2 |
3) Non-Destructive Testing requirement
A, magnetic detect 100%GB (more than 2 grades)
B, ultrasound examination (R angle; Machined surface) JIS Z2345 is more than 2 grades.Bottom surface sections is more than 3 grades.
Because the mill size is very big, so the moulding molding is difficult, reach the mill of above-mentioned specification requirement, and its casting method is the difficult problem that solution is badly in need of in this area always.
Summary of the invention
Goal of the invention: the object of the present invention is to provide a kind ofly to reach the technical quality requirement, and can manufacture the casting method of mill.
Technical scheme: a kind of casting method of mill, comprise formative technology, Technology for Heating Processing and casting process, it is characterized in that: said formative technology adopts cored-up mould; Said core assembly comprises the crust loam core; The bottom in said crust loam core is provided with end core, and top is provided with the top box loam core; Be disposed with inner chamber loam core and rising head loam core between said top box loam core and the core of the said end; Said crust loam core, end core, rising head loam core, inner chamber loam core and top box loam core constitute the casting cavity that holds said mill.
Preferable, fill out and put chromite sand and dark contoured chill at all fillet places of said core assembly; Said crust loam core, end core, rising head loam core, inner chamber loam core and top box loam core all are coated with zirconium English powder; Said crust loam core is by 8 loam core assembly, and employing quartz sand forms; Said top box loam core is formed by 6 loam core assembly; The loam core preparation of lime stone magnesium carbon granule is adopted in said inner chamber loam core, rising head loam core and top box loam core, and 250-350 ℃ of oven dry 8 hours.
Preferable, the lime stone magnesium charcoal sand for preparing said inner chamber loam core, rising head loam core and top box loam core prepares according to following method: 1) 100 parts of lime sands are mixed and grind; 2) add 5 parts of magnesia powders and 1.5 parts of mixed stone rollers of pulverized limestones; 3) add 7 parts of waterglass and mix stone roller; Said umber is in the weight of mixture.
Preferable, above-mentioned steps 1) in, mixing the time of grinding is 3 minutes; Above-mentioned steps 2) in, mixing the time of grinding is 3 minutes; Above-mentioned steps 3) in, mixing the time of grinding is 8 minutes.
Preferable, chromite sand is prepared by following method: 1) 100 parts of chromite sands are mixed and grind; 2) add 1.5 parts of syrup and mix stone roller; 3) add 6 parts of waterglass and mix stone roller; Said umber is in the weight of mixture.
Preferable, above-mentioned steps 1) in, mixing the time of grinding is 2 minutes; Above-mentioned steps 2) in, mixing the time of grinding is 2 minutes; Above-mentioned steps 3) in, mixing the time of grinding is 5 minutes.
Preferable, said Technology for Heating Processing comprises annealing process, normalizing process and tempering process successively.
Preferable, said annealing process carries out according to following steps: 1) through 18 hours, foundry goods at the uniform velocity is heated to 930 ± 20 ℃; 2) insulation is 20 hours; 3) cool to the furnace below 350 ℃ and come out of the stove.
Preferable, said normalizing and tempering process carry out according to following steps: 1) through 18 hours, foundry goods at the uniform velocity is heated to 930 ± 30 ℃, and is incubated 20 hours; 2), at the uniform velocity air-cooled to below 350 ℃ through 16 hours; 3), foundry goods at the uniform velocity is heated to 650 ± 30 ℃, and is incubated 20 hours through 10 hours; 4) cool to the furnace below 250 ℃ and come out of the stove.
Preferable, said casting process may further comprise the steps: 1) many bags are poured into a mould 157 tons of molten steel simultaneously, and the rising head molten steel rises 200 millimeters; 2) in 20 minutes again 25 tons of molten steel of teeming one bag water fullly, make total molten steel reach 182 tons.
Preferable, said casting process may further comprise the steps: 1) many bags are poured into a mould 163 tons of molten steel simultaneously, and the rising head molten steel rises 500 millimeters; 2) in 2～3 hours again 19 tons of molten steel of teeming one bag water fullly, make total molten steel reach 182 tons.
Preferable, said casting process may further comprise the steps: 1) many bags are poured into a mould 157 tons of molten steel simultaneously, and the rising head molten steel rises 200 millimeters; 2) 10 tons of molten steel of teeming one bag again in 20 minutes, the rising head molten steel rises 300 millimeters; 3) in 2～3 hours again 15 tons of molten steel of teeming one bag water fullly, make total molten steel reach 182 tons.
Beneficial effect: the present invention has remedied the blank that mill is produced in batches, can guarantee that mill satisfies specification requirement, and the required molten steel of casting is few, and production cost is low, and efficient is high.
Description of drawings
Fig. 1 is the structural representation of core assembly in the embodiments of the invention 1;
Fig. 2 is the structural representation of mill and casting system in the casting technique;
Fig. 3 is the vertical view of Fig. 4;
Fig. 4 is the upward view of Fig. 2;
Fig. 5 is the front view of Fig. 2.
The specific embodiment
Below in conjunction with accompanying drawing, through embodiment, technical scheme of the present invention is elaborated, but protection scope of the present invention is not limited to said embodiment.
Embodiment 1: to shown in Figure 5, a kind of casting method of mill comprises formative technology, Technology for Heating Processing and casting process like Fig. 1, and formative technology adopts cored-up mould; Core assembly comprises crust loam core 2; The bottom in crust loam core 2 is provided with end core 5, and top is provided with top box loam core 1; Be disposed with inner chamber loam core 3 and rising head loam core 4 between top box loam core 1 and the end core 5; Crust loam core 2, end core 5, rising head loam core 4, inner chamber loam core 3 and top box loam core 1 constitute the casting cavity 6 that holds mill foundry goods 10.
Fill out and put chromite sand and dark contoured chill 7 at all fillet places of core assembly.Crust loam core 2, end core 5, rising head loam core 4, inner chamber loam core 3 and top box loam core 1 all are coated with zirconium English powder.Crust loam core 2 is by 8 loam core assembly; And adopt quartz sand to form; Top box loam core 1 is formed by 6 loam core assembly, and the loam core preparation of lime stone magnesium carbon granule is adopted in inner chamber loam core 3, rising head loam core 4 and top box loam core 1, and 250-350 ℃ of oven dry 8 hours; To remove the moisture in the loam core, reduce the gas forming amount of loam core when casting.
The lime stone magnesium charcoal sand in preparation inner chamber loam core, rising head loam core and top box loam core prepares according to following method: 1) 100 parts of lime sands are mixed and ground 3 minutes; 2) add 5 parts of magnesia powders and 1.5 parts of mixed stone rollers 3 minutes of pulverized limestones; 3) add 7 parts of waterglass and mixed stone roller 8 minutes; Umber is in the weight of mixture.
Chromite sand is prepared by following method: 1) 100 parts of chromite sands are mixed and ground 2 minutes; 2) add 1.5 parts of syrup and mixed stone roller 2 minutes; 3) add 6 parts of waterglass and mixed stone roller 5 minutes; Umber is in the weight of mixture.
Technology for Heating Processing comprises annealing process, normalizing process and tempering process successively.
Annealing process carries out according to following steps: 1) through 18 hours, foundry goods at the uniform velocity is heated to 930 ± 20 ℃; 2) insulation is 20 hours; 3) cool to the furnace below 350 ℃ and come out of the stove.
Normalizing and tempering process carry out according to following steps: 1) through 18 hours, foundry goods at the uniform velocity is heated to 930 ± 30 ℃, and is incubated 20 hours; 2), at the uniform velocity air-cooled to below 350 ℃ through 16 hours; 3), foundry goods at the uniform velocity is heated to 650 ± 30 ℃, and is incubated 20 hours through 10 hours; 4) cool to the furnace below 250 ℃ and come out of the stove.
Casting process may further comprise the steps: 1) many bags are poured into a mould 157 tons of molten steel simultaneously, and the rising head molten steel rises 200 millimeters; 2) in 20 minutes again 25 tons of molten steel of teeming one bag water fullly, make total molten steel reach 182 tons.
The clay core part of rising head 8 is made by wooden model, and remainder is joined insulating riser sleeve 9.
Rising head interior molten steel rises 1/3 place's time point dead head in cast back also spreads heat preserving agent.
Embodiment 2: the technology that present embodiment adopted is identical with embodiment 1, and different is that casting process may further comprise the steps: 1) many bags are poured into a mould 163 tons of molten steel simultaneously, and the rising head molten steel rises 500 millimeters; 2) in 2～3 hours again 19 tons of molten steel of teeming one bag water fullly, make total molten steel reach 182 tons.
Embodiment 3: the technology that present embodiment adopted is identical with embodiment 1, and different is that casting process may further comprise the steps: 1) many bags are poured into a mould 157 tons of molten steel simultaneously, and the rising head molten steel rises 200 millimeters; 2) 10 tons of molten steel of teeming one bag again in 20 minutes, the rising head molten steel rises 300 millimeters; 3) in 2～3 hours again 15 tons of molten steel of teeming one bag water fullly, make total molten steel reach 182 tons.
As stated, although represented and explained the present invention that with reference to specific preferred embodiment it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the accompanying claims definition, can make various variations in form with on the details to it.
Claims (6)
1. the casting method of a mill comprises formative technology, Technology for Heating Processing and casting process, it is characterized in that:
Said formative technology adopts cored-up mould; Said core assembly comprises crust loam core (2); The bottom in said crust loam core (2) is provided with end core (5), and top is provided with top box loam core (1); Be disposed with inner chamber loam core (3) and rising head loam core (4) between said top box loam core (1) and the core of the said end (5); Said crust loam core (2), end core (5), rising head loam core (4), inner chamber loam core (3) and top box loam core (1) constitute the casting cavity (6) that holds said mill;
Said Technology for Heating Processing comprises annealing process, normalizing process and tempering process successively;
Said annealing process carries out according to following steps:
1), foundry goods at the uniform velocity is heated to 930 ± 20 ℃ through 18 hours;
2) insulation is 20 hours;
3) cool to the furnace below 350 ℃ and come out of the stove;
Said normalizing and tempering process carry out according to following steps:
1), foundry goods at the uniform velocity is heated to 930 ± 30 ℃, and is incubated 20 hours through 18 hours;
2), at the uniform velocity air-cooled to below 350 ℃ through 16 hours;
3), foundry goods at the uniform velocity is heated to 650 ± 30 ℃, and is incubated 20 hours through 10 hours;
4) cool to the furnace below 250 ℃ and come out of the stove;
Said casting process may further comprise the steps:
1) many bags are poured into a mould 157 tons of molten steel simultaneously, and the rising head molten steel rises 200 millimeters;
2) in 20 minutes again 25 tons of molten steel of teeming one bag water fullly, make total molten steel reach 182 tons;
Or said casting process may further comprise the steps:
1) many bags are poured into a mould 163 tons of molten steel simultaneously, and the rising head molten steel rises 500 millimeters;
2) in 2～3 hours again 19 tons of molten steel of teeming one bag water fullly, make total molten steel reach 182 tons;
Or said casting process may further comprise the steps:
1) many bags are poured into a mould 157 tons of molten steel simultaneously, and the rising head molten steel rises 200 millimeters;
2) 10 tons of molten steel of teeming one bag again in 20 minutes, the rising head molten steel rises 300 millimeters;
3) in 2～3 hours again 15 tons of molten steel of teeming one bag water fullly, make total molten steel reach 182 tons.
2. the casting method of mill as claimed in claim 1, it is characterized in that: fill out and put chromite sand and dark contoured chill at all fillet places of said core assembly; Said crust loam core (2), end core (5), rising head loam core (4), inner chamber loam core (3) and top box loam core (1) all are coated with zirconium English powder; Said crust loam core (2) is by 8 loam core assembly, and employing quartz sand forms; Said top box loam core (1) is formed by 6 loam core assembly; The loam core preparation of lime stone magnesium carbon granule is adopted in said inner chamber loam core (3), rising head loam core (4) and top box loam core (1), and 250-350 ℃ of oven dry 8 hours.
3. the casting method of mill as claimed in claim 2, it is characterized in that: the lime stone magnesium charcoal sand for preparing said inner chamber loam core, rising head loam core and top box loam core prepares according to following method: 1) 100 parts of lime sands are mixed and grind; 2) add 5 parts of magnesia powders and 1.5 parts of mixed stone rollers of pulverized limestones; 3) add 7 parts of waterglass and mix stone roller; Said umber is in the weight of mixture.
4. the casting method of mill as claimed in claim 3 is characterized in that: in the step 1), mixing the time of grinding is 3 minutes; Step 2) in, mixing the time of grinding is 3 minutes; In the step 3), mixing the time of grinding is 8 minutes.
5. the casting method of mill as claimed in claim 2, it is characterized in that: chromite sand is prepared by following method: 1) 100 parts of chromite sands are mixed and grind; 2) add 1.5 parts of syrup and mix stone roller; 3) add 6 parts of waterglass and mix stone roller;
Said umber is in the weight of mixture.
6. the casting method of mill as claimed in claim 5 is characterized in that: in the step 1), mixing the time of grinding is 2 minutes; Step 2) in, mixing the time of grinding is 2 minutes; In the step 3), mixing the time of grinding is 5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105923414A CN102000771B (en) | 2010-12-17 | 2010-12-17 | Casting method of grinding disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105923414A CN102000771B (en) | 2010-12-17 | 2010-12-17 | Casting method of grinding disc |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102000771A CN102000771A (en) | 2011-04-06 |
| CN102000771B true CN102000771B (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105923414A Expired - Fee Related CN102000771B (en) | 2010-12-17 | 2010-12-17 | Casting method of grinding disc |
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| CN (1) | CN102000771B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103008557B (en) * | 2012-12-18 | 2016-04-13 | 杭州杭氧铸造有限公司 | A kind of casting core assembly of compressor case and formative method |
| CN105057587B (en) * | 2015-08-13 | 2018-03-23 | 湖南省至科铸造有限责任公司 | A kind of abrasive disk casting pattern and its preparation technology for making abrasive disk |
| CN111151702A (en) * | 2020-03-17 | 2020-05-15 | 福建大通互惠精密铸造有限公司 | Improve CO2Method for character and eye definition of sodium silicate sand casting |
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| CN1069350C (en) * | 1997-05-19 | 2001-08-08 | 杨文财 | Production method of the millstone for ball grinding mill |
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Granted publication date: 20120620 Termination date: 20151217 |
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