CN104128564B - A kind of casting technique of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear - Google Patents

A kind of casting technique of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear Download PDF

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Publication number
CN104128564B
CN104128564B CN201410411068.9A CN201410411068A CN104128564B CN 104128564 B CN104128564 B CN 104128564B CN 201410411068 A CN201410411068 A CN 201410411068A CN 104128564 B CN104128564 B CN 104128564B
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sand
casting
hinge ear
spheroidal graphite
graphite cast
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CN104128564A (en
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温文林
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HOUMA JINFENG MACHINERY CASTING Co Ltd
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HOUMA JINFENG MACHINERY CASTING Co Ltd
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Abstract

The present invention relates to the casting technique of a kind of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear, this technique is by design and the hinge on all four master mold of ear shape and swage, then make by penetrating sand mechanism the upper and lower swage die cavity covering sand covering layer of sand with 6-8mm, finally according to charger sheet, the qualified molten iron made is poured in the lumen type after mould assembling, to be cast complete after, unpack and obtain casting hinge ear part.The hinge ear of the more traditional forged steel material of this Sand-Faced Metal Mould Casting technique, production cost can reduce by 35%, plenty of time and the cost such as manpower, equipment are saved, effectively improve production efficiency and castability simultaneously, reduce casting wasted product rate, and this is simple for process, wide market, remarkable in economical benefits, is applicable to most enterprise and uses.

Description

A kind of casting technique of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear
Technical field
The present invention relates to a kind of technique of casting spheroidal graphite cast-iron hinge ear, in particular, relate to a kind of technique that traditional forged steel material can be replaced to cut with scissors ear, especially a kind of casting technique of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear, this technique, under the prerequisite of ensuring the quality of products, greatly reduces the cost of part.
Background technology
In existing industrial production, the hinge ear of various shape is widely used, but material is forged steel pieces, production cost is higher, therefore, in 2004, our company is that national first hand adopts self-hardening sand molding technical matters to produce spheroidal graphite cast-iron hinge ear, but 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, 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; Casting of appearance of cast is coarse; 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
The object of the invention is to, for above-mentioned defect, provide a kind of casting technique of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear eliminating hinge ear internal porosity, shrinkage cavity, adopting in this way can batch micro operations high-precision hinge ear part, thus replace forged steel hinge ear, hinge ear production cost 35% can be reduced.
Technical scheme of the present invention: a kind of casting technique of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear, comprises the following steps:
(1) design a set of with hinge ear shape on all four model as master mold;
(2) make the swage that matches with master mold, swage and master mold supporting time gap be 6-8mm;
(3) master mold is fixed on penetrates on sand machine worktable, swage is placed in the top of master mold, after penetrating the clamping of sand machine and putting in place, precoated sand being incident upon cavity between master mold and swage by penetrating sand machine sand-spraying hole, penetrating sand and completing Post RDBMS 25-30s;
(4) to be solidifiedly complete molding after 30 seconds, after naturally cooling 25-30s, obtain the upper and lower swage die cavity covering sand successively;
(5), after the upper mo(u)ld bottom half having covered sand being placed screen pack, mould assembling clamps, and is hung on pouring platform;
(6) according to charger sheet, raw material are put into smelting furnace successively to heat, melt out the qualified molten iron that temperature is 1530 DEG C;
(7) adopt and pour method spheroidising is carried out to molten iron;
(8) molten iron carries out pouring into a mould after removing slag and squeezes into instantaneous ferrite inovulant, and the duration of pouring is 8 minutes, and pouring temperature controls at 1430 DEG C, and casting complete, after 15 minutes, is unpacked and taken out foundry goods, namely obtain required hinge tragus base part.
Further, described design a set of comprise designing and producing with hinge ear shape on all four model cut with scissors ear moulds of industrial equipment, running gate system, heating template and base.
Further, the model of penetrating sand machine described in is that IFSI260 Ka Siding covers sand molding machine.
Further, the granularity of described instantaneous ferrite inovulant is 0.3-0.8mm.
Compared with prior art, there is following beneficial effect in the present invention: eliminates hinge ear internal porosity shrinkage cavity defect, and the spheroidal graphite cast-iron produced cuts with scissors ear steady quality and hinge ear dense internal organization, nodulizing grade 1-2 grades, graphite size 6-8 grades; Foundry goods roughness can reach Ra25 μm; Mechanical processing of casting surplus can drop to 2.5mm, and compared with cutting with scissors ear with forged steel the same period, production cost can reduce by 35%, saves material; Stable processing technique, produce terse, labor strength is low, and production efficiency is high, same operating personnel, and Iron Mould Coated Sand production efficiency is 6 times of self-hardening sand; Foundry goods resin sand used amount is few, and recyclable.
Detailed description of the invention
Embodiment: a kind of casting technique of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear, comprises the following steps:
(1) design a set of with hinge ear shape on all four model as master mold; This model comprises and designs and produces hinge ear moulds of industrial equipment, running gate system, heating template and base.
(2) make the swage that matches with master mold, swage and master mold supporting time gap be 6-8mm;
(3) master mold is fixed on IFSI260 Ka Siding to cover sand and penetrate sand and penetrate on the workbench of sand machine, swage is placed in the top of master mold, after penetrating the clamping of sand machine and putting in place, precoated sand being incident upon cavity between master mold and swage by penetrating sand machine sand-spraying hole, penetrating sand and completing Post RDBMS 25s;
(4) to be solidifiedly complete molding after 30 seconds, after naturally cooling 30s, obtain the upper and lower swage die cavity covering sand successively;
(5), after the upper mo(u)ld bottom half having covered sand being placed screen pack, mould assembling clamps, and is hung on pouring platform;
(6) according to charger sheet, raw material are put into smelting furnace successively to heat, melt out the qualified molten iron that temperature is 1530 DEG C; Charger sheet is as follows:
C:3.58-3.72%; Si:2.4-2.6%; Cu:0.3-0.5%; Mn:0.2-0.4%, all the other are Fe.
(7) adopt and pour method spheroidising is carried out to molten iron;
(8) molten iron carries out pouring into a mould after removing slag and squeezes into the instantaneous ferrite inovulant that granularity is 0.3-0.8mm, and the duration of pouring is 8 minutes, and pouring temperature controls at 1430 DEG C, and casting complete, after 15 minutes, is unpacked and taken out foundry goods, namely obtain required hinge tragus base part.

Claims (4)

1. a casting technique for Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear, is characterized in that, comprise the following steps:
(1) design a set of with hinge ear shape on all four model as master mold;
(2) make the swage that matches with master mold, swage and master mold supporting time gap be 6-8mm;
(3) master mold is fixed on penetrates on sand machine worktable, swage is placed in the top of master mold, after penetrating the clamping of sand machine and putting in place, precoated sand being incident upon cavity between master mold and swage by penetrating sand machine sand-spraying hole, penetrating sand and completing Post RDBMS 25-30s;
(4) to be solidifiedly complete molding after 30 seconds, after naturally cooling 25-30s, obtain the upper and lower swage die cavity covering sand successively;
(5), after the upper mo(u)ld bottom half having covered sand being placed screen pack, mould assembling clamps, and is hung on pouring platform;
(6) according to charger sheet by C:3.58-3.72%, Si:2.4-2.6%, Cu:0.3-0.5%, Mn:0.2-0.4%, all the other are that smelting furnace heating put into successively by the raw material of Fe, melt out the qualified molten iron that temperature is 1530 DEG C;
(7) adopt and pour method spheroidising is carried out to molten iron;
(8) molten iron carries out pouring into a mould after removing slag and squeezes into instantaneous ferrite inovulant, the duration of pouring is 8 minutes, pouring temperature controls at 1430 DEG C, casting complete, after 15 minutes, is unpacked and is taken out foundry goods, namely obtain C:3.58-3.72%, Si:2.4-2.6%, Cu:0.3-0.5%, Mn:0.2-0.4%, all the other are the spheroidal graphite cast-iron hinge tragus base part of Fe.
2. the casting technique of a kind of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear according to claim 1, is characterized in that, described design is a set of to be comprised designing and producing with the on all four model of hinge ear shape and cut with scissors ear moulds of industrial equipment, running gate system, heating template and base.
3. the casting technique of a kind of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear according to claim 1, is characterized in that, described in penetrate sand machine model be that IFSI260 Ka Siding covers sand molding machine.
4. the casting technique of a kind of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear according to claim 1, it is characterized in that, the granularity of described instantaneous ferrite inovulant is 0.3-0.8mm.
CN201410411068.9A 2014-08-20 2014-08-20 A kind of casting technique of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear Active CN104128564B (en)

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CN105108064A (en) * 2015-09-26 2015-12-02 侯马市晋烽机械铸造有限公司 Method for casting bearing cap on subway locomotive by using sand faced permanent iron molding technology
CN106001426B (en) * 2016-07-14 2018-06-19 安徽樵森电气科技股份有限公司 A kind of yoke plate casting technique
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
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
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
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
CN107964622A (en) * 2017-11-27 2018-04-27 梅州伟友耐磨材料有限公司 A kind of excavator ductile iron gear of high-ductility high wear-resistant high strength and high hardness and preparation method thereof
CN110756745B (en) * 2018-07-28 2021-03-02 江阴市惠尔信精密装备股份有限公司 Casting sand mold forming process
CN108971430A (en) * 2018-08-17 2018-12-11 襄汾县福康铸造有限责任公司 A kind of crankshaft iron die sand casting process and its swage device
CN110625062A (en) * 2019-09-30 2019-12-31 侯马市晋烽机械铸造有限公司 Casting process for casting hinge lug by adopting shell mold

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CN101906565B (en) * 2009-06-08 2012-01-04 河北工业大学 Carbide-containing ausferrite spheroidal graphite cast iron grinding ball and manufacturing method thereof
CN101602433B (en) * 2009-07-01 2011-10-12 宣化冶金工业有限责任公司 Scraper of CuNiMo alloying isothermal quenching ductile iron scraper conveyor and preparation method
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