CN105108070A - Method for casting end cap of non-transmission end of traction motor on subway locomotive - Google Patents
Method for casting end cap of non-transmission end of traction motor on subway locomotive Download PDFInfo
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- CN105108070A CN105108070A CN201510620470.2A CN201510620470A CN105108070A CN 105108070 A CN105108070 A CN 105108070A CN 201510620470 A CN201510620470 A CN 201510620470A CN 105108070 A CN105108070 A CN 105108070A
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Abstract
The invention relates to a method for casting an end cap of a non-transmission end of a traction motor on a subway locomotive. According to the method, a sand faced permanent iron molding technology is adopted. Through the sand faced permanent iron molding technology, a cavity which is in the shape of a complete end cap of the non-transmission end is obtained, and four cores are fed to directly cast a part of the end cap of the non-transmission end, appearance and inner quality of castings are improved effectively, scrappage of the castings is reduced, weight of the castings is reduced by 16%, production efficiency is improved greatly, and a large amount of time and cost of labor and equipment are saved. By the method, the cost is reduced by 28%. Moreover, the method is simple and practical, obvious in economic benefit, wide in market prospect and suitable for most of enterprises.
Description
Technical field
The invention belongs to casting field, be specifically related to a kind ofly adopt the method for Iron Mould Coated Sand cast underground engines drawing electronic non-transmision end end cap.
Background technology
In existing industrial production, produce driving end end cap foundry goods, 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 instability; Foundry goods cooling velocity is slow, and interior tissue is not fine and close, nodulizing grade low (3 grades), and material is unstable; The coarse difference of casting of appearance of cast; Mechanical processing of casting surplus is large, waste material, and machined cost is high; Production process is complicated, and labor strength is large, and production efficiency is low; Self-hardening resin consumption is large, and roughing sand consumption is large, causes production cost high.
Summary of the invention
Technical problem to be solved by this invention is to provide the casting method of traction electric machine non-transmision end end cap on a kind of underground engines, this casting method adopts Iron Mould Coated Sand technique, the defect of non-transmision end cover internal shrinkage porosite, shrinkage cavity, crackle can be eliminated, improve surface roughness, and the non-transmision end end cap precision cast out is high, lightweight.
Technical scheme of the present invention: the casting method of traction electric machine non-transmision end end cap on a kind of underground engines, this casting method adopts Iron Mould Coated Sand technique to cast, and concrete steps are as follows:
(1) design a set of with the on all four model of traction electric machine non-transmision end end cap shape on underground engines as master mold;
(2) core box that four covers are consistent with traction electric machine non-transmision end end cap respective cavities on underground engines is designed and produced;
(3) make the swage external form that is associated with master mold, swage external form and master mold supporting time gap be 5 ~ 7mm;
(4) master mold that step (1) designs 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;
(5) core box that step (2) designs and produces is fixed on core making machine, matched moulds is heated to 170 ~ 200 DEG C, penetrates sand plate and to put in place clamping, then penetrate sand, and according to fuse thickness solidification 5 ~ 10 minutes, die sinking was got core and removed and splits seam;
(6) 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, tightly bonding to swage relevant position under four obtained for step (5) cores, namely obtaining can the die cavity of mould assembling cast;
(7) 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;
(8) in nodularization bag, add nodulizer 0.9%, ferrosilicon 7%, employing is poured method and is carried out spheroidising to the molten iron that step (7) is got ready;
(9) mould assembling pour into a mould after being fixedly clamped step (8) process after molten iron, the duration of pouring is 8 minutes, pouring temperature controls at 1330 ~ 1430 DEG C, namely required C:3.75 ~ 3.88% is obtained, Si:1.95 ~ 2.2%, S≤0.02%, P :≤0.035%, Mn :≤0.015%, all the other are the spheroidal graphite cast-iron non-transmision end end cap blank part of Fe, are incubated unpacking taking-up foundry goods after 20 minutes.
Further, the master mold described in step (1) comprises the moulds of industrial equipment, running gate system, heating template and the base that design and produce traction electric machine driving end end cap on underground engines.
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 non-transmision end cover internal shrinkage porosite, shrinkage cavity, crackle, steady quality; Dense internal organization, nodulizing grade 1 ~ 2 grade, graphite size 6 ~ 8 grades, the non-transmision end end cap stable material quality cast out, foundry goods roughness can reach Ra25 μm.
2, the casting weight that the foundry goods adopting the inventive method to cast out casts out than conventional method alleviates 16%, and Mechanical processing of casting surplus can drop to 2.5mm, has not only saved material, and reduces machined cost.
3, stable processing technique, produce terse, labor strength is low, same personnel, and Iron Mould Coated Sand production efficiency is 6 times of self-hardening sand, substantially increases production efficiency, has saved plenty of time and the cost such as manpower, equipment, and the method cost reduces by 28%.
4, foundry goods resin sand used amount is few, and recyclable, effectively reduces the production cost of enterprise, thus improves 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 external form in the present invention;
Fig. 2 is the top view of cope match plate in the present invention;
Fig. 3 is the top view of mould board in the present invention;
Fig. 4 is the structural representation of first set core box in the present invention;
Fig. 5 is the structural representation of the second cover core box in the present invention;
Fig. 6 is the structural representation of the 3rd cover core box in the present invention;
Fig. 7 is the structural representation of the 4th cover core box in the present invention;
Fig. 8 is the structural representation of non-transmision end end cap patrix in the present invention;
Fig. 9 is the sectional view of Fig. 8;
Figure 10 is the structural representation of non-transmision end end cap counterdie in the present invention;
Figure 11 is the sectional view of Figure 10.
In figure: 1-non-transmision end end cap patrix, 2-non-transmision end end cap counterdie, 3 cope match plates, 4-mould board, 5-swage external form, 6-sand railway carriage or compartment, 7-plug hole, 8,9,10,11-core box.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated, understands the present invention better to enable those skilled in the art.
Embodiment 1
The casting method of traction electric machine non-transmision end end cap on a kind of underground engines, this casting method adopts Iron Mould Coated Sand technique to cast, concrete steps are as follows: (1) design a set of with the on all four model of traction electric machine non-transmision end end cap shape on underground engines as master mold, described master mold comprises the moulds of industrial equipment, running gate system, heating template and the base that design and produce traction electric machine non-transmision end end cap on underground engines.As shown in Fig. 2, Fig. 8, Fig. 9, described cope match plate 3 is provided with non-transmision end end cap patrix 1, described non-transmision end end cap patrix 1 offers the die cavity of non-transmision end end cap external structure.As shown in Fig. 3, Figure 10, Figure 11, described mould board 4 is provided with non-transmision end end cap counterdie 2, described non-transmision end end cap counterdie 2 offers the die cavity of non-transmision end cover internal structure.(2) core box 8,9,10,11 that four covers are consistent with traction electric machine non-transmision end end cap respective cavities on underground engines is designed and produced, as shown in Figure 4 to 7.(3) make the swage external form 5 that is associated with master mold, swage external form and master mold supporting time gap be 7mm, as shown in Figure 1.(4) master mold designed is fixed on penetrates on sand machine, be heated to 250 DEG C, and swage external form of closing, penetrate sand plate and to put in place clamping, then penetrate sand, solidify 25 seconds.(5) core box designed and produced is fixed on core making machine, matched moulds is heated to 200 DEG C, and penetrate sand plate and to put in place clamping, then penetrate sand, solidify 10 minutes according to fuse thickness, die sinking is got core and removed and splits seam.(6) 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, tightly bonding to swage relevant position under four obtained for step (5) cores, namely obtaining can the die cavity of mould assembling cast.Described mould board establishes 4 in sandbox 6, and sand railway carriage or compartment 6 is provided with plug hole 7, and described plug hole 7 is communicated with rotor pressing ring die cavity.(7) 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; (8) in nodularization bag, add nodulizer 0.9%, ferrosilicon 7%, employing is poured method and is carried out spheroidising to the molten iron got ready.(9) 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 1430 DEG C, namely required C3.8% is obtained, Si2%, S0.02%, P0.035%, Mn0.015%, all the other are the spheroidal graphite cast-iron non-transmision end end cap blank part of Fe, are incubated unpacking taking-up foundry goods after 20 minutes.
The spheroidal graphite cast-iron non-transmision end end cap part cast 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=237, tensile strength б b=543MPa, percentage elongation δ=18% ,-20 DEG C of cold impact value AK=17J/m
2, foundry goods roughness can reach Ra25 μm.
Embodiment 2
The casting method of traction electric machine non-transmision end end cap on a kind of underground engines, this casting method adopts Iron Mould Coated Sand technique to cast, concrete steps are as follows: (1) design a set of with the on all four model of traction electric machine non-transmision end end cap shape on underground engines as master mold, described master mold comprises the moulds of industrial equipment, running gate system, heating template and the base that design and produce traction electric machine non-transmision end end cap on underground engines.As shown in Fig. 2, Fig. 8, Fig. 9, described cope match plate 3 is provided with non-transmision end end cap patrix 1, described non-transmision end end cap patrix 1 offers the die cavity of non-transmision end end cap external structure.As shown in Fig. 3, Figure 10, Figure 11, described mould board 4 is provided with non-transmision end end cap counterdie 2, described non-transmision end end cap counterdie 2 offers the die cavity of non-transmision end cover internal structure.(2) core box that four covers are consistent with traction electric machine non-transmision end end cap respective cavities on underground engines is designed and produced, 8,9,10,11, as shown in Figure 4 to 7.(3) make the swage external form that is associated with master mold, swage external form and master mold supporting time gap be 6mm, as shown in Figure 1.(4) master mold designed 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.(5) core box designed and produced is fixed on core making machine, matched moulds is heated to 175 DEG C, and penetrate sand plate and to put in place clamping, then penetrate sand, solidify 5 minutes according to fuse thickness, die sinking is got core and removed and splits seam.(6) 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, tightly bonding to swage relevant position under four obtained for step (5) cores, namely obtaining can the die cavity of mould assembling cast.Described mould board establishes 4 in sandbox 6, and sand railway carriage or compartment 6 is provided with plug hole 7, and described plug hole 7 is communicated with rotor pressing ring die cavity.(7) 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; (8) in nodularization bag, add nodulizer 0.9%, ferrosilicon 7%, employing is poured method and is carried out spheroidising to the molten iron got ready.(9) 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 1380 DEG C, namely required C3.79% is obtained, Si2.08%, S0.02%, P0.035%, Mn0.015%, all the other are the spheroidal graphite cast-iron non-transmision end end cap blank part of Fe, are incubated unpacking taking-up foundry goods after 20 minutes.
The spheroidal graphite cast-iron non-transmision end end cap part cast 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=239, tensile strength б b=540MPa, percentage elongation δ=18% ,-20 DEG C of cold impact value AK=15J/m
2, foundry goods roughness can reach Ra25 μm.
Embodiment 3
The casting method of traction electric machine non-transmision end end cap on a kind of underground engines, this casting method adopts Iron Mould Coated Sand technique to cast, concrete steps are as follows: (1) design a set of with the on all four model of traction electric machine non-transmision end end cap shape on underground engines as master mold, described master mold comprises the moulds of industrial equipment, running gate system, heating template and the base that design and produce traction electric machine non-transmision end end cap on underground engines.As shown in Fig. 2, Fig. 8, Fig. 9, described cope match plate 3 is provided with non-transmision end end cap patrix 1, described non-transmision end end cap patrix 1 offers the die cavity of non-transmision end end cap external structure.As shown in Fig. 3, Figure 10, Figure 11, described mould board 4 is provided with non-transmision end end cap counterdie 2, described non-transmision end end cap counterdie 2 offers the die cavity of non-transmision end cover internal structure.(2) core box that four covers are consistent with traction electric machine non-transmision end end cap respective cavities on underground engines is designed and produced, 8,9,10,11, as shown in Figure 4 to 7.(3) make the swage external form that is associated with master mold, swage external form and master mold supporting time gap be 5mm, as shown in Figure 1.(4) master mold designed is fixed on penetrates on sand machine, be heated to 260 DEG C, and swage external form 5 of closing, penetrate sand plate and to put in place clamping, then penetrate sand, solidify 25 seconds.(5) core box designed and produced is fixed on core making machine, matched moulds is heated to 180 DEG C, and penetrate sand plate and to put in place clamping, then penetrate sand, solidify 8 minutes according to fuse thickness, die sinking is got core and removed and splits seam.(6) 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, tightly bonding to swage relevant position under four obtained for step (5) cores, namely obtaining can the die cavity of mould assembling cast.Described mould board establishes 4 in sandbox 6, and sand railway carriage or compartment 6 is provided with plug hole 7, and described plug hole 7 is communicated with rotor pressing ring die cavity.(7) 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; (8) in nodularization bag, add nodulizer 0.9%, ferrosilicon 7%, employing is poured method and is carried out spheroidising to the molten iron got ready.(9) 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 1410 DEG C, namely required C3.82% is obtained, Si2.1%, S0.02%, P0.034%, Mn0.014%, all the other are the spheroidal graphite cast-iron non-transmision end end cap blank part of Fe, are incubated unpacking taking-up foundry goods after 20 minutes.
The spheroidal graphite cast-iron non-transmision end end cap part cast 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=244, tensile strength б b=548MPa, percentage elongation δ=18.2% ,-20 DEG C of cold impact value AK=16J/m
2, foundry goods roughness can reach Ra25 μm.
The model of penetrating sand machine in above-described embodiment is that IFSI260 Ka Siding covers sand molding machine, and core making machine is our company's self-control.
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 (4)
1. the casting method of traction electric machine non-transmision end end cap on underground engines, it is characterized in that this casting method adopts Iron Mould Coated Sand technique to cast, concrete steps are as follows:
(1) design a set of with the on all four model of traction electric machine non-transmision end end cap shape on underground engines as master mold;
(2) core box that four covers are consistent with traction electric machine non-transmision end end cap respective cavities on underground engines is designed and produced;
(3) make the swage external form that is associated with master mold, swage external form and master mold supporting time gap be 5 ~ 7mm;
(4) master mold that step (1) designs 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;
(5) core box that step (2) designs and produces is fixed on core making machine, matched moulds is heated to 170 ~ 200 DEG C, penetrates sand plate and to put in place clamping, then penetrate sand, and according to fuse thickness solidification 5 ~ 10 minutes, die sinking was got core and removed and splits seam;
(6) 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, tightly bonding to swage relevant position under four obtained for step (5) cores, namely obtaining can the die cavity of mould assembling cast;
(7) 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;
(8) in nodularization bag, add nodulizer 0.9%, ferrosilicon 7%, employing is poured method and is carried out spheroidising to the molten iron that step (7) is got ready;
(9) mould assembling pour into a mould after being fixedly clamped step (8) process after molten iron, the duration of pouring is 8 minutes, pouring temperature controls at 1330 ~ 1430 DEG C, namely required C:3.75 ~ 3.88% is obtained, Si:1.95 ~ 2.2%, S≤0.02%, P :≤0.035%, Mn :≤0.015%, all the other are the spheroidal graphite cast-iron non-transmision end end cap blank part of Fe, are incubated unpacking taking-up foundry goods after 20 minutes.
2. the casting method of traction electric machine non-transmision end end cap on underground engines according to claim 1, is characterized in that the master mold described in step (1) comprises the moulds of industrial equipment, running gate system, heating template and the base that design and produce traction electric machine driving end end cap on underground engines.
3. the casting method of traction electric machine non-transmision end end cap 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.
4. the casting method of traction electric machine non-transmision end end cap 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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| CN201510620470.2A CN105108070A (en) | 2015-09-26 | 2015-09-26 | Method for casting end cap of non-transmission end of traction motor on subway locomotive |
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| CN201510620470.2A CN105108070A (en) | 2015-09-26 | 2015-09-26 | Method for casting end cap of non-transmission end of traction motor on subway locomotive |
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| CN106311983A (en) * | 2016-08-31 | 2017-01-11 | 侯马市威创动力机械有限公司 | Method for producing cylinder cover by means of iron mold coated sand technology |
| CN107138681A (en) * | 2017-04-27 | 2017-09-08 | 柳州聚龙科技有限公司 | The casting method of Aluminum Alloy Cover |
| CN107199315A (en) * | 2017-04-27 | 2017-09-26 | 柳州聚龙科技有限公司 | The casting method of brake disc |
| 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 |
| CN107671241A (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 for casting underground engines drive end bearing bracket |
| CN107695302A (en) * | 2017-09-29 | 2018-02-16 | 侯马市晋烽机械铸造有限公司 | A kind of Sand-Faced Metal Mould Casting technique for casting N-terminal end cap |
| CN108941442A (en) * | 2018-09-15 | 2018-12-07 | 台州进亿成再生资源回收有限公司 | A kind of steel-casting resin sand and preparation method thereof and application method |
| CN109047665A (en) * | 2018-09-30 | 2018-12-21 | 侯马市晋烽机械铸造有限公司 | A kind of novel non-transmision end end cap Sand-Faced Metal Mould Casting technique |
| CN110947904A (en) * | 2019-11-27 | 2020-04-03 | 山东联诚精密制造股份有限公司 | Preparation method of steering gear shell of commercial vehicle |
| CN110947904B (en) * | 2019-11-27 | 2021-07-27 | 山东联诚精密制造股份有限公司 | Preparation method of steering gear shell of commercial vehicle |
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Application publication date: 20151202 |