CN105328125A - Casting method of rotor pressing ring for metro locomotive - Google Patents
Casting method of rotor pressing ring for metro locomotive Download PDFInfo
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- CN105328125A CN105328125A CN201510620461.3A CN201510620461A CN105328125A CN 105328125 A CN105328125 A CN 105328125A CN 201510620461 A CN201510620461 A CN 201510620461A CN 105328125 A CN105328125 A CN 105328125A
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- pressing ring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/068—Semi-permanent moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention relates to a casting method of a rotor pressing ring for a metro locomotive. According to the method, casting is conducted through a sand-lined metal mold process; a rotor pressing ring female mold and an iron mold profile associated with the rotor pressing ring female mold are designed and manufactured firstly, a cavity between a model and the iron mold profile is filled with precoated sand through a shooter, and a mold cavity capable of being poured in a mold-assembling manner is molded; and smelted molten iron is poured into the molded mold cavity and cooled, and a rotor pressing ring casting can be obtained. A rotor pressing ring part is directly cast through the method, the appearance and the internal quality of the casting are improved effectively, the scrap rate of the casting is lowered, and the weight of the casting is reduced by 15%; and meanwhile, balance weight hole casting and molding are achieved, the drilling process is omitted, production efficiency is improved greatly, a great amount of time cost, manpower cost, equipment cost and the like are saved, production cost can be reduced by 30%, the market prospect is wide, and the method is suitable for most casting enterprises.
Description
Technical field
The invention belongs to casting field, be specifically related to a kind of method adopting the rotor pressing ring of Iron Mould Coated Sand cast on underground engines.
Background technology
In existing industrial production, produce the rotor pressing ring foundry goods that underground engines uses, all adopt self-hardening sand molding technical matters.This technique preparation process in there is following defect: in due to self-hardening sand technique molten iron cool cause cast-internal to produce slowly shrinkage porosite, shrinkage cavity, crackle, quality is unstable, and foundry goods cooling velocity is slow, causes cast-internal to be organized not fine and close, nodulizing grade is low, be generally 3 grades, material is unstable, and casting of appearance of cast is coarse, counterweight hole on the foundry goods cast also needs machining, the Mechanical processing of casting surplus cast is large, waste material, and machined cost is high.In addition, adopt self-hardening sand molding production process complicated, labor strength is large, and production efficiency is low, and self-hardening resin consumption is large, and roughing sand consumption is large, adds the production cost of enterprise.
Summary of the invention
Technical problem to be solved by this invention overcomes above-mentioned deficiency, a kind of method adopting the rotor pressing ring of Iron Mould Coated Sand cast on underground engines is provided, the method can eliminate the defect of rotor pressing ring internal porosity, shrinkage cavity, crackle, the rotor pressing ring element precision cast out is high, lightweight, effectively can reduce the production cost of enterprise.
Technical scheme of the present invention: a kind of casting method of the rotor pressing ring on underground engines, this casting method adopts Iron Mould Coated Sand technique to cast, and specifically comprises the following steps:
(1) design a set of with underground engines on the on all four model of rotor pressing ring shape that uses as master mold;
(2) make the swage external form that is associated with master mold, swage external form and master mold supporting time gap be 5 ~ 7mm;
(3) master mold that step (1) is made is fixed on penetrates on sand machine, be heated to 230 ~ 270 DEG C, and swage external form of closing, penetrate sand plate and to put in place clamping, then penetrate sand, solidify 25 seconds;
(4) precoated sand is incident upon in pre-designed swage external form by penetrating sand machine sand-spraying hole, precoated sand is made to be filled to cavity between model and swage external form, molding after 30 seconds, naturally after cooling 25 ~ 30s, obtain the upper and lower swage external form die cavity covering sand successively, namely through covering sand can mould assembling cast die cavity;
(5) heat to put into mid-frequency melting furnace after the raw material ratio of the pig iron and steel scrap, melting molten iron temperature of coming out of the stove is 1530 DEG C;
(6) adopt and pour method spheroidising is carried out to the molten iron that step (5) is got ready;
(7) mould assembling pour into a mould after being fixedly clamped step (6) process after molten iron, the duration of pouring is 8 minutes, and pouring temperature controls at 1330 ~ 1430 DEG C, namely obtains required spheroidal graphite cast-iron rotor pressing ring blank part, be incubated after 20 minutes unpack taking-up foundry goods.
Further, the ratio of the described pig iron and steel scrap is: the pig iron 88%, steel scrap 12%.
Further, the spheroidising described in step (5) in nodularization bag, is adding nodulizer 0.9%, ferrosilicon 7%, adopts the method that pours to pour molten iron into nodularization bag and the molten iron that obtains.
Further, each component of spheroidal graphite cast-iron rotor pressing ring blank part described in step (7) and the percentage of content are: C:3.75 ~ 3.88%, Si:1.95 ~ 2.2%, S≤0.02%, P :≤0.035%; Mn :≤0.015%, all the other are Fe.
Further, the master mold described in step (1) comprises the rotor pressing ring moulds of industrial equipment, running gate system, heating template and the base that design and produce and underground engines uses.
Further, described swage external form is associated with master mold, swage external form and master mold supporting time gap be 5 ~ 7mm.
Further, the model of penetrating sand machine described in is that IFSI260 Ka Siding covers sand molding machine.
The present invention compared with prior art has following beneficial effect:
1, the inventive method eliminates the defects such as rotor pressing ring internal porosity, shrinkage cavity, crackle, and the rotor pressing ring part quality cast out is stablized, dense internal organization, nodulizing grade 1 ~ 2 grade, graphite size 6 ~ 8 grades, and foundry goods roughness can reach Ra25 μm;
2, the counterweight hole on rotor pressing ring and rotor pressing ring are once cast, and alleviate casting weight 15%, without the need to carrying out Drilling operation again, reduce the scrappage that foundry goods causes because machined is defective, Mechanical processing of casting surplus can drop to 2.5mm, which saves material, reduces machined cost;
3, stable processing technique, step is simple and easy to carry out, and effectively can reduce labor strength, enhance productivity, and adopts the method production cost to reduce by 30%.
4, same staff, the production efficiency of employing Iron Mould Coated Sand is 6 times of self-hardening sand molding, and foundry goods resin sand used amount is few, and recyclable, effectively reduce casting cost, thus improve the economic benefit of enterprise, this casting method wide market, is applicable to most foundry enterprise.
Accompanying drawing explanation
Fig. 1 is the top view of swage in the embodiment of the present invention;
Fig. 2 is the top view of cope match plate in the embodiment of the present invention;
Fig. 3 is the top view of mould board in the embodiment of the present invention;
Fig. 4 is the top view of embodiment of the present invention rotor trim ring model;
Fig. 5 is the sectional view of Fig. 4 along A-A hatching.
In figure: 1-rotor pressing ring model, 2-rotor pressing ring patrix, 3-rotor pressing ring counterdie, 4-cope match plate, 5-mould board, 6-swage external form, 7-sandbox, 8-plug hole, 9-stem stem.
Detailed description of the invention
Below in conjunction with Figure of description, the embodiment of the present invention is further described.
Embodiment 1
A kind of casting method of the rotor pressing ring on underground engines, this casting method adopts Iron Mould Coated Sand technique to cast, specifically comprise the following steps: (1) design a set of with underground engines on the on all four model of rotor pressing ring shape that uses as master mold, described master mold is rotor pressing ring model 1, as shown in Figure 4, Figure 5, the center of described rotor pressing ring model 1 has installing hole, an one end face is plane, other end is with a boss, rotor pressing ring has two circle passages ringwise, totally 84; Described rotor pressing ring model 1 is divided into rotor pressing ring patrix 2 and rotor pressing ring counterdie 3.As shown in Figure 2, described cope match plate 4 is provided with rotor pressing ring patrix 1, described rotor pressing ring patrix 2 offers the die cavity of rotor pressing ring end face and installing hole.As shown in Figure 3, described mould board 5 is provided with rotor pressing ring counterdie 3, described rotor pressing ring counterdie 3 offers the die cavity of rotor pressing ring with raised head face and installing hole.Also comprise the rotor pressing ring moulds of industrial equipment, running gate system, heating template and the base that design and produce and underground engines uses.(2) make the swage external form 6 that is associated with master mold, as shown in Figure 1, swage external form and master mold supporting time gap be 7mm.(3) master mold made is fixed on penetrates on sand machine, be heated to 270 DEG C, and swage external form of closing, penetrate sand plate and to put in place clamping, then penetrate sand, solidify 25 seconds.(4) precoated sand is incident upon in pre-designed swage external form by penetrating sand machine sand-spraying hole, precoated sand is made to be filled to cavity between model and swage external form, molding after 30 seconds, naturally after cooling 30s, obtain the upper and lower swage external form die cavity covering sand successively, namely through covering sand can mould assembling cast die cavity, described mould board 5 is located in sandbox 7, sand railway carriage or compartment 7 is provided with plug hole 8, and described plug hole 8 is communicated with rotor pressing ring die cavity.(5) by the pig iron 88%, steel scrap 12% puts into mid-frequency melting furnace heating, and melting molten iron temperature of coming out of the stove is 1530 DEG C.(6) in nodularization bag, add nodulizer 0.9%, ferrosilicon 7%, adopt the method that pours molten iron to be poured into nodularization bag and carry out spheroidising.(7) mould assembling pours into a mould the molten iron after processing after being fixedly clamped, and the duration of pouring is 8 minutes, and pouring temperature controls, at 1430 DEG C, namely to obtain C3.88%, Si:2.2%, S0.02%, P0.035%, Mn0.015%, all the other are the spheroidal graphite cast-iron rotor pressing ring blank part of Fe, are incubated unpacking taking-up foundry goods after 20 minutes.
The spheroidal graphite cast-iron rotor pressing ring part of casting is after cleaning polishing, property indices all can meet drawing requirement, without the need to the processing such as heat treatment and boring process, after testing, the nodulizing grade of foundry goods is 2 grades, graphite size 8 grades, hardness HB=213, tensile strength б b=558MPa, percentage elongation δ=18.5% ,-20 DEG C of cold impact value AK=17J/m
2, foundry goods roughness can reach Ra25 μm.
Embodiment 2
A kind of casting method of the rotor pressing ring on underground engines, this casting method adopts Iron Mould Coated Sand technique to cast, specifically comprise the following steps: (1) design a set of with underground engines on the on all four model of rotor pressing ring shape that uses as master mold, described master mold is rotor pressing ring model 1, as shown in Figure 4, Figure 5, the center of described rotor pressing ring model 1 has installing hole, an one end face is plane, other end is with a boss, rotor pressing ring has two circle passages ringwise, totally 84; Described rotor pressing ring model 1 is divided into rotor pressing ring patrix 2 and rotor pressing ring counterdie 3.As shown in Figure 2, described cope match plate 4 is provided with rotor pressing ring patrix 1, described rotor pressing ring patrix 2 offers the die cavity of rotor pressing ring end face and installing hole.As shown in Figure 3, described mould board 5 is provided with rotor pressing ring counterdie 3, described rotor pressing ring counterdie 3 offers the die cavity of rotor pressing ring with raised head face and installing hole.Also comprise the rotor pressing ring moulds of industrial equipment, running gate system, heating template and the base that design and produce and underground engines uses.(2) make the swage external form 6 that is associated with master mold, as shown in Figure 1, swage external form and master mold supporting time gap be 7mm.(3) master mold made is fixed on penetrates on sand machine, be heated to 265 DEG C, and swage external form of closing, penetrate sand plate and to put in place clamping, then penetrate sand, solidify 25 seconds.(4) precoated sand is incident upon in pre-designed swage external form by penetrating sand machine sand-spraying hole, precoated sand is made to be filled to cavity between model and swage external form, molding after 30 seconds, naturally after cooling 28s, obtain the upper and lower swage external form die cavity covering sand successively, namely through covering sand can mould assembling cast die cavity, described mould board 5 is located in sandbox 7, sand railway carriage or compartment 7 is provided with plug hole 8, and described plug hole 8 is communicated with rotor pressing ring die cavity.(5) by the pig iron 88%, steel scrap 12% puts into mid-frequency melting furnace heating, and melting molten iron temperature of coming out of the stove is 1530 DEG C.(6) in nodularization bag, add nodulizer 0.9%, ferrosilicon 7%, adopt the method that pours molten iron to be poured into nodularization bag and carry out spheroidising.(7) mould assembling pours into a mould the molten iron after processing after being fixedly clamped, the duration of pouring is 8 minutes, pouring temperature controls at 1400 DEG C, namely C3.83% is obtained, Si:2.1%, S0.019%, P0.033%, Mn0.015%, all the other are the spheroidal graphite cast-iron rotor pressing ring blank part of Fe, are incubated unpacking taking-up foundry goods after 20 minutes.
The spheroidal graphite cast-iron rotor pressing ring part of casting is after cleaning polishing, property indices all can meet drawing requirement, without the need to the processing such as heat treatment and boring process, after testing, the nodulizing grade of foundry goods is 2 grades, graphite size 8 grades, hardness HB=208, tensile strength б b=520MPa, percentage elongation δ=18% ,-20 DEG C of cold impact value AK=16J/m
2, foundry goods roughness can reach Ra25 μm.
Embodiment 3
A kind of casting method of the rotor pressing ring on underground engines, this casting method adopts Iron Mould Coated Sand technique to cast, specifically comprise the following steps: (1) design a set of with underground engines on the on all four model of rotor pressing ring shape that uses as master mold, described master mold is rotor pressing ring model 1, as shown in Figure 4, Figure 5, the center of described rotor pressing ring model 1 has installing hole, an one end face is plane, other end is with a boss, rotor pressing ring has two circle passages ringwise, totally 84; Described rotor pressing ring model 1 is divided into rotor pressing ring patrix 2 and rotor pressing ring counterdie 3.As shown in Figure 2, described cope match plate 4 is provided with rotor pressing ring patrix 1, described rotor pressing ring patrix 2 offers the die cavity of rotor pressing ring end face and installing hole.As shown in Figure 3, described mould board 5 is provided with rotor pressing ring counterdie 3, described rotor pressing ring counterdie 3 offers the die cavity of rotor pressing ring with raised head face and installing hole.Also comprise the rotor pressing ring moulds of industrial equipment, running gate system, heating template and the base that design and produce and underground engines uses.(2) make the swage external form 6 that is associated with master mold, as shown in Figure 1, swage external form and master mold supporting time gap be 7mm.(3) master mold made is fixed on penetrates on sand machine, be heated to 240 DEG C, and swage external form of closing, penetrate sand plate and to put in place clamping, then penetrate sand, solidify 25 seconds.(4) precoated sand is incident upon in pre-designed swage external form by penetrating sand machine sand-spraying hole, precoated sand is made to be filled to cavity between model and swage external form, molding after 30 seconds, naturally after cooling 25s, obtain the upper and lower swage external form die cavity covering sand successively, namely through covering sand can mould assembling cast die cavity, described mould board 5 is located in sandbox 7, sand railway carriage or compartment 7 is provided with plug hole 8, and described plug hole 8 is communicated with rotor pressing ring die cavity.(5) by the pig iron 88%, steel scrap 12% puts into mid-frequency melting furnace heating, and melting molten iron temperature of coming out of the stove is 1530 DEG C.(6) in nodularization bag, add nodulizer 0.9%, ferrosilicon 7%, adopt the method that pours molten iron to be poured into nodularization bag and carry out spheroidising.(7) mould assembling pours into a mould the molten iron after processing after being fixedly clamped, and the duration of pouring is 8 minutes, and pouring temperature controls, at 1380 DEG C, namely to obtain C3.8%, Si:2%, S0.02%, P0.035%, Mn0.015%, all the other are the spheroidal graphite cast-iron rotor pressing ring blank part of Fe, are incubated unpacking taking-up foundry goods after 20 minutes.
The spheroidal graphite cast-iron rotor pressing ring part of casting is after cleaning polishing, property indices all can meet drawing requirement, without the need to the processing such as heat treatment and boring process, after testing, the nodulizing grade of foundry goods is 2 grades, graphite size 8 grades, hardness HB=203, tensile strength б b=517MPa, percentage elongation δ=18.5% ,-20 DEG C of cold impact value AK=15J/m
2, foundry goods roughness can reach Ra25 μm.
Above-mentioned three embodiments are all directly cast out rotor pressing ring part, effective like this outward appearance and inherent quality that improve foundry goods, reduce foundry goods scrappage, alleviate casting weight 15%, counterweight hole casting simultaneously on rotor pressing ring, has economized drilling operating, has substantially increased production efficiency, saved plenty of time and the cost such as manpower, equipment, the method can be enterprise and reduces production cost 30%.
Above-described embodiment is not construed as limiting the scope of the present invention, and within every spirit in the present invention's design and principle, any amendment that one of skill in the art can make, equivalent to replace and improvement etc. all should be included within protection scope of the present invention.
Claims (7)
1. the casting method of the rotor pressing ring on underground engines, is characterized in that this casting method adopts Iron Mould Coated Sand technique to cast, specifically comprises the following steps:
(1) design a set of with underground engines on the on all four model of rotor pressing ring shape that uses as master mold;
(2) make the swage external form that is associated with master mold, swage external form and master mold supporting time gap be 5 ~ 7mm;
(3) master mold that step (1) is made is fixed on penetrates on sand machine, be heated to 230 ~ 270 DEG C, and swage external form of closing, penetrate sand plate and to put in place clamping, then penetrate sand, solidify 25 seconds;
(4) precoated sand is incident upon in pre-designed swage external form by penetrating sand machine sand-spraying hole, precoated sand is made to be filled to cavity between model and swage external form, molding after 30 seconds, naturally after cooling 25 ~ 30s, obtain the upper and lower swage external form die cavity covering sand successively, namely through covering sand can mould assembling cast die cavity;
(5) heat to put into mid-frequency melting furnace after the raw material ratio of the pig iron and steel scrap, melting molten iron temperature of coming out of the stove is 1530 DEG C;
(6) adopt and pour method spheroidising is carried out to the molten iron that step (5) is got ready;
(7) mould assembling pour into a mould after being fixedly clamped step (6) process after molten iron, the duration of pouring is 8 minutes, and pouring temperature controls at 1330 ~ 1430 DEG C, namely obtains required spheroidal graphite cast-iron rotor pressing ring blank part, be incubated after 20 minutes unpack taking-up foundry goods.
2. the casting method of the rotor pressing ring on underground engines according to claim 1, is characterized in that the ratio of the described pig iron and steel scrap is: the pig iron 88%, steel scrap 12%.
3. the casting method of the rotor pressing ring on underground engines according to claim 1, it is characterized in that the spheroidising described in step (5) is adding nodulizer 0.9% in nodularization bag, ferrosilicon 7%, adopts the method that pours to pour molten iron into nodularization bag and the molten iron that obtains.
4. the casting method of the rotor pressing ring on underground engines according to claim 1; it is characterized in that each component of spheroidal graphite cast-iron rotor pressing ring blank part described in step (7) and the percentage of content are: C:3.75 ~ 3.88%; Si:1.95 ~ 2.2%, S≤0.02%, P :≤0.035%; Mn :≤0.015%, all the other are Fe.
5. the casting method of the rotor pressing ring on underground engines according to claim 1, is characterized in that the master mold described in step (1) comprises the rotor pressing ring moulds of industrial equipment, running gate system, heating template and the base that design and produce and underground engines uses.
6. the casting method of the rotor pressing ring on underground engines according to claim 1, is characterized in that described swage external form is associated with master mold, swage external form and master mold supporting time gap be 5 ~ 7mm.
7. the casting method of the rotor pressing ring on underground engines according to claim 1, the model of penetrating sand machine described in it is characterized in that is that IFSI260 Ka Siding covers sand molding machine.
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| CN201510620461.3A CN105328125A (en) | 2015-09-26 | 2015-09-26 | Casting method of rotor pressing ring for metro locomotive |
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| CN201510620461.3A CN105328125A (en) | 2015-09-26 | 2015-09-26 | Casting method of rotor pressing ring for metro locomotive |
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Cited By (5)
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| CN106001426A (en) * | 2016-07-14 | 2016-10-12 | 安徽樵森电气科技股份有限公司 | Link plate casting technique |
| CN106141089A (en) * | 2016-07-12 | 2016-11-23 | 湖州鼎盛机械制造有限公司 | The Iron Mould Coated Sand technique of the support of elevator traction machine |
| CN107671246A (en) * | 2017-09-29 | 2018-02-09 | 侯马市晋烽机械铸造有限公司 | A kind of Sand-Faced Metal Mould Casting technique of casting D ends end cap |
| CN108543913A (en) * | 2018-06-01 | 2018-09-18 | 西峡县众德汽车部件有限公司 | It prepares the device of spheroidal graphite casting and prepares the method for spheroidal graphite casting |
| CN117600435A (en) * | 2024-01-17 | 2024-02-27 | 山西东鑫衡隆机械制造股份有限公司 | Crack elimination method for cast iron mold |
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Application publication date: 20160217 |