CN104162633A - Lost foam casting production low-carbon steel upper core disc and impact seat processing method - Google Patents
Lost foam casting production low-carbon steel upper core disc and impact seat processing method Download PDFInfo
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- CN104162633A CN104162633A CN201310183607.3A CN201310183607A CN104162633A CN 104162633 A CN104162633 A CN 104162633A CN 201310183607 A CN201310183607 A CN 201310183607A CN 104162633 A CN104162633 A CN 104162633A
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Abstract
The invention discloses a lost foam casting production low-carbon steel upper core disc and impact seat processing method. The method comprises the following steps: making foam polystyrene EPS into a foaming member, which has the same shape as a cast and is a little bigger than the cast; painting a plurality of fireproof coatings on the surface of the foaming member, placing the foaming member in non-adhesive moulding sands, carrying out casting on the foaming member, wherein during the casting process, the foam polystyrene EPS foaming member is burnt and gasified under the assistance of vacummizing and vibration during the casting process, and finally the molten liquid replaces the foaming member as the cast. The lost foam technology is used to manufacture upper core disc and impact seat, is capable of reducing the metal tissue defects and improving the compactness and anti-fatigue strength of metals, moreover has the advantages of high precision in size, reducing on cleanness, reduced processing time, compact tissue of products, suitability for massive production, and high automation, can greatly improve the operation environment, and has greater advantages and a vaster prospect, compared to the conventional manufacture technology of upper core disc and impact seat.
Description
Technical field
The present invention relates to casting technology field, be specifically related to a kind of lost foam casting and produce core dish, striker processing method on mild steel.
Background technology
Striker is an important carrying on rolling stock and needs shock-resistant part, all to adopt sand casting process in the past, ubiquity surface flatness is poor, dimensional accuracy is low, shrinkage porosite subcutaneous blowhole and be mingled with particularly defects i.e.cracks, and the mechanical performance indexs such as the impact flexibility of this product, fatigue strength are brought to adverse effect.It is large that upper core dish has volume, belongs to small lot batch manufacture, requires dense internal organization, and intensity is high, the feature that fatigue resistance is high.Because forging has stronger advantage aspect interior tissue and mechanical property, therefore, on heavy haul railway vehicle, often adopt FMT to manufacture key components and parts.Although use FMT, produce the problems such as upper core dish, striker can effectively improve ubiquitous segregation, are mingled with, shrinkage porosite crackle, but because the two shape is very complicated, adopt and forge possibility moulding hardly, and to forging die and equipment require highly, therefore manufacture the technique of upper core dish, striker and need to further improve.
Model casting technology also can be for the manufacture of core dish, striker on stainless steel.Typically refer to fusible material is made to apperance, make shell touching the coated some layers of refractory material in sample surface, then apperance fusing is discharged to shell, thereby obtain the casting mold without die joint, casting method that can back-up sand cast after high-temperature roasting.And because upper core dish, striker belong to mild steel, adopting traditional casting technique, product exists tissue defects, density and fatigue resistance all poor, and casting process deals with very complicated.
Summary of the invention
Technical problem solved by the invention is to provide a kind of lost foam casting to produce core dish, striker processing method on mild steel, thereby solves the problem in above-mentioned background technology.
Technical problem solved by the invention realizes by the following technical solutions:
Lost foam casting is produced core dish, a striker processing method on mild steel, comprises the steps:
(1) make bubbles model mould;
(2) adopt EPS granules of polystyrene to carry out prefoam by pre-foaming machine, obtain the pre-bead of sending out;
(3) bead of sending out is in advance injected to mould by forming machine, by Steam Heating, again foams, after foaming completely by the cooling rear taking-up of apperance;
(4) apperance after moulding is dried and allowed apperance fully dewater in 72 hours;
(5) pouring and riser systems and apperance are carried out bonding;
(6) configure special fireproof coating, carry out dip-coating, dip-coating refer to " pouring and riser systems integral body sticks on apperance " is upper after whole dip-coating, object is special fireproof coating to be evenly coated in to the surface of apperance, after enter baking room and dry, the product after being dried;
(7) special shape mo(u)lding box is placed on shake table and puts sand, vibrate floating;
(8) product after drying in step (6) is positioned in sandbox, puts sand vibration, after consolidation, cover with plastic sheeting; And back-up sand 80mm-100mm again;
(9) place after cup, put rubber tube and open vavuum pump;
(10) foam in the sandbox after back-up sand consolidation is lighted, logical oxygen, so that foam completing combustion reduces the residual object of carbon thereby reach;
(10) melting molten steel is poured into a mould;
(11) in casting process, take to pour into a mould the in the situation that of vibration;
(12) in casting solidification process, progressively adjust negative pressure to improve the deformability of sand mold, thereby can avoid foundry goods because shrinking to be obstructed, to crack in process of setting.
As a kind of improvement, described special fireproof coating is high-alumina refractory powder and binding agent.
As a kind of improvement, the thickness of described special fireproof coating coating is 2-3mm.
Lost foam casting provided by the invention is the casting new method of a precise forming, in lost foam casting, with foamed polystyrene EPS, make foaming piece identical with foundry goods shape but that size is bigger, surface is repeatedly coated with refractory coating (coating layer thickness is controlled at 2-3mm), then place it in cohesionless molding sand and cast, utilize the high temperature of motlten metal to make foamed polystyrene EPS foaming piece combustion gasification, in conjunction with vacuumizing and the vibration of cast limit, limit, molten metal replaces foaming piece and has formed foundry goods.Technology of EPC is applied to manufacture upper core dish, striker, not only can eliminate its tissue defects, improve density and fatigue resistance, and dimensional accuracy is high, reduce cleaning, save process time, dense structure, can realize extensive, production in enormous quantities, automaticity is high, can greatly improve operating environment, compares with traditional upper core dish, the technology of striker, Technology of EPC has impayable advantage, has broad prospects.
Owing to having adopted above structure, the present invention has following beneficial effect:
What the present invention adopted is Technology of EPC, this technology is compared and is had impayable advantage with traditional foundry engieering, the method has sand bond adjustment freely, casting compactness is high, structure property is good, and the advantage that improve service life is taked first to burn afterwards and water simultaneously, foam is fully burning under the environment of oxygen enrichment, thereby resolves into CO completely
2and H
2o vapour, the CO of generation
2and H
2o vapour is discharged outside sand mold by negative pressure, by oxygen-enriched combusting, oneself disappears foam completely, forms ghost, thereby avoid because foam gasifies, not exclusively causing molten steel recarburization in casting process, fundamentally broken the mythology of " evaporative pattern technique can not be cast mild steel ".
Accompanying drawing explanation
Fig. 1 is the structural representation of operative installations of the present invention;
1, sandbox; 2, dry sand; 3, the first cup; 4, the first rising head, the 5, second rising head 6, the second cup; 7, sprue; 8, the product after the first oven dry; 9, ingate; 10, vibrating motor; 11, tubular axis; 12, spring; 13, vibration table surface; 14, escape pipe; 15, the product after the second oven dry.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Embodiment 1
Lost foam casting is produced core dish, a striker processing method on mild steel, comprises the steps:
(1) make bubbles model mould;
(2) adopt EPS granules of polystyrene to carry out prefoam by pre-foaming machine, obtain the pre-bead of sending out;
(3) bead of sending out is in advance injected to mould by forming machine, by Steam Heating, again foams, after foaming completely by the cooling rear taking-up of apperance;
(4) apperance after moulding is dried and allowed apperance fully dewater in 72 hours;
(5) pouring and riser systems and apperance are carried out bonding;
(6) configure special fireproof coating, carry out dip-coating, dip-coating refers to " pouring and riser systems integral body sticks on apperance " upper rear whole dip-coating, object is special fireproof coating to be evenly coated in to the surface of apperance, after enter baking room and dry, product after being dried, special fireproof coating is high-alumina refractory powder and binding agent, the thickness of special fireproof coating coating is 2mm;
(7) special shape mo(u)lding box is placed on shake table and puts sand, vibrate floatingly, the device of use as shown in Figure 1;
(8) product after drying in step (6) is positioned in sandbox, puts sand vibration, after consolidation, cover with plastic sheeting; And back-up sand 80mm again;
(9) place after cup, put rubber tube and open vavuum pump;
(10) foam in the sandbox after back-up sand consolidation is lighted, logical oxygen, so that foam completing combustion reduces the residual object of carbon thereby reach;
(10) melting molten steel is poured into a mould;
(11) in casting process, take to pour into a mould the in the situation that of vibration;
(12) in casting solidification process, progressively adjust negative pressure to improve the deformability of sand mold, thereby can avoid foundry goods because shrinking to be obstructed, to crack in process of setting.
Embodiment 2
Lost foam casting is produced core dish, a striker processing method on mild steel, comprises the steps:
(1) make bubbles model mould;
(2) adopt EPS granules of polystyrene to carry out prefoam by pre-foaming machine, obtain the pre-bead of sending out;
(3) bead of sending out is in advance injected to mould by forming machine, by Steam Heating, again foams, after foaming completely by the cooling rear taking-up of apperance;
(4) apperance after moulding is dried and allowed apperance fully dewater in 72 hours;
(5) pouring and riser systems and apperance are carried out bonding;
(6) configure special fireproof coating, carry out dip-coating, dip-coating refers to " pouring and riser systems integral body sticks on apperance " upper rear whole dip-coating, object is special fireproof coating to be evenly coated in to the surface of apperance, after enter baking room and dry, product after being dried, special fireproof coating is high-alumina refractory powder and binding agent, the thickness of special fireproof coating coating is 3mm;
(7) special shape mo(u)lding box is placed on shake table and puts sand, vibrate floating;
(8) product after drying in step (6) is positioned in sandbox, puts sand vibration, after consolidation, cover with plastic sheeting; And back-up sand 100mm again;
(9) place after cup, put rubber tube and open vavuum pump;
(10) foam in the sandbox after back-up sand consolidation is lighted, logical oxygen, so that foam completing combustion reduces the residual object of carbon thereby reach;
(10) melting molten steel is poured into a mould;
(11) in casting process, take to pour into a mould the in the situation that of vibration;
(12) in casting solidification process, progressively adjust negative pressure to improve the deformability of sand mold, thereby can avoid foundry goods because shrinking to be obstructed, to crack in process of setting.
Embodiment 3
Lost foam casting is produced core dish, a striker processing method on mild steel, comprises the steps:
(1) make bubbles model mould;
(2) adopt EPS granules of polystyrene to carry out prefoam by pre-foaming machine, obtain the pre-bead of sending out;
(3) bead of sending out is in advance injected to mould by forming machine, by Steam Heating, again foams, after foaming completely by the cooling rear taking-up of apperance;
(4) apperance after moulding is dried and allowed apperance fully dewater in 72 hours;
(5) pouring and riser systems and apperance are carried out bonding;
(6) configure special fireproof coating, carry out dip-coating, dip-coating refers to " pouring and riser systems integral body sticks on apperance " upper rear whole dip-coating, object is special fireproof coating to be evenly coated in to the surface of apperance, after enter baking room and dry, product after being dried, special fireproof coating is high-alumina refractory powder and binding agent, the thickness of special fireproof coating coating is 2.5mm;
(7) special shape mo(u)lding box is placed on shake table and puts sand, vibrate floating;
(8) product after drying in step (6) is positioned in sandbox, puts sand vibration, after consolidation, cover with plastic sheeting; And back-up sand 90mm again;
(9) place after cup, put rubber tube and open vavuum pump;
(10) foam in the sandbox after back-up sand consolidation is lighted, logical oxygen, so that foam completing combustion reduces the residual object of carbon thereby reach;
(10) melting molten steel is poured into a mould;
(11) in casting process, take to pour into a mould the in the situation that of vibration;
(12) in casting solidification process, progressively adjust negative pressure to improve the deformability of sand mold, thereby can avoid foundry goods because shrinking to be obstructed, to crack in process of setting.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (3)
1. lost foam casting is produced core dish, a striker processing method on mild steel, it is characterized in that: comprise the steps:
(1) make bubbles model mould;
(2) adopt EPS granules of polystyrene to carry out prefoam by pre-foaming machine, obtain the pre-bead of sending out;
(3) bead of sending out is in advance injected to mould by forming machine, by Steam Heating, again foams, after foaming completely by the cooling rear taking-up of apperance;
(4) apperance after moulding is dried and allowed apperance fully dewater in 72 hours;
(5) pouring and riser systems and apperance are carried out bonding;
(6) configure special fireproof coating, carry out dip-coating, dip-coating refer to " pouring and riser systems integral body sticks on apperance " is upper after whole dip-coating, object is special fireproof coating to be evenly coated in to the surface of apperance, after enter baking room and dry, the product after being dried;
(7) special shape mo(u)lding box is placed on shake table and puts sand, vibrate floating;
(8) product after drying in step (6) is positioned in sandbox, puts sand vibration, after consolidation, cover with plastic sheeting; And back-up sand 80mm-100mm again;
(9) place after cup, put rubber tube and open vavuum pump;
(10) foam in the sandbox after back-up sand consolidation is lighted, logical oxygen, so that foam completing combustion reduces the residual object of carbon thereby reach;
(11) melting molten steel is poured into a mould;
(12) in casting process, take to pour into a mould the in the situation that of vibration;
(13) in casting solidification process, progressively adjust negative pressure to improve the deformability of sand mold, thereby can avoid foundry goods because shrinking to be obstructed, to crack in process of setting.
2. a kind of lost foam casting according to claim 1 is produced core dish, striker processing method on mild steel, it is characterized in that: described special fireproof coating is high-alumina refractory powder and binding agent.
3. a kind of lost foam casting according to claim 1 is produced core dish, striker processing method on mild steel, it is characterized in that: the thickness of described special fireproof coating coating is 2-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310183607.3A CN104162633A (en) | 2013-05-17 | 2013-05-17 | Lost foam casting production low-carbon steel upper core disc and impact seat processing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310183607.3A CN104162633A (en) | 2013-05-17 | 2013-05-17 | Lost foam casting production low-carbon steel upper core disc and impact seat processing method |
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| CN104162633A true CN104162633A (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310183607.3A Pending CN104162633A (en) | 2013-05-17 | 2013-05-17 | Lost foam casting production low-carbon steel upper core disc and impact seat processing method |
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Cited By (17)
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| CN104550849A (en) * | 2015-01-22 | 2015-04-29 | 山西天海泵业有限公司 | Rotor cage bar casting equipment and technology of submersible motor |
| CN104785718A (en) * | 2015-03-25 | 2015-07-22 | 池州市华兴天骑精密机械铸造有限公司 | Device for using wax mold to manufacture casting mold |
| CN104985121A (en) * | 2015-06-23 | 2015-10-21 | 吉林省威创机电工程有限公司 | Casting method of vehicle medium-and-large-sized stamping die |
| CN105344939A (en) * | 2015-12-02 | 2016-02-24 | 宁夏苏宁新能源设备有限公司 | Vacant-shell vacuum negative-pressure vibrating casting method for integrally casting middle trough |
| CN105436398A (en) * | 2015-08-21 | 2016-03-30 | 国网山东省电力公司临沂供电公司 | External cable sensing alarm |
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| CN106825442A (en) * | 2016-12-28 | 2017-06-13 | 重庆市九明机械制造有限公司 | Sandbox vibrating device |
| CN106825411A (en) * | 2017-01-17 | 2017-06-13 | 四川维珍高新材料有限公司 | A kind of super-low carbon stainless steel lost foam casting process |
| CN109550889A (en) * | 2017-09-25 | 2019-04-02 | 高淳县龙宁精密铸造有限公司 | Chief axis evaporative pattern and its method for casting main shaft ram |
| CN110039004A (en) * | 2019-04-29 | 2019-07-23 | 兴化市雅兰机械制造有限公司 | A kind of production method of high intensity railway steel-casting |
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| CN111496185A (en) * | 2020-04-27 | 2020-08-07 | 遂昌县鑫鼎特种铸造有限公司 | Production process of lost foam casting |
| CN113714465A (en) * | 2020-12-25 | 2021-11-30 | 宁夏军浩机械设备制造有限公司 | Lost foam casting mold and casting method |
| CN113865348A (en) * | 2021-10-13 | 2021-12-31 | 陕西远大新材料技术有限公司 | Lost foam shell-shaped furnace liner for electric furnace lining and use method thereof |
| CN114769519A (en) * | 2022-03-31 | 2022-07-22 | 沈阳工业大学 | Preparation method and equipment for lost foam casting nodular cast iron material |
| CN115090835A (en) * | 2022-06-22 | 2022-09-23 | 曹涛 | Precise casting process of hardware casting |
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- 2013-05-17 CN CN201310183607.3A patent/CN104162633A/en active Pending
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| CN104550849A (en) * | 2015-01-22 | 2015-04-29 | 山西天海泵业有限公司 | Rotor cage bar casting equipment and technology of submersible motor |
| CN104785718A (en) * | 2015-03-25 | 2015-07-22 | 池州市华兴天骑精密机械铸造有限公司 | Device for using wax mold to manufacture casting mold |
| CN104985121A (en) * | 2015-06-23 | 2015-10-21 | 吉林省威创机电工程有限公司 | Casting method of vehicle medium-and-large-sized stamping die |
| CN105436398A (en) * | 2015-08-21 | 2016-03-30 | 国网山东省电力公司临沂供电公司 | External cable sensing alarm |
| CN105344939A (en) * | 2015-12-02 | 2016-02-24 | 宁夏苏宁新能源设备有限公司 | Vacant-shell vacuum negative-pressure vibrating casting method for integrally casting middle trough |
| CN105598370B (en) * | 2016-02-23 | 2018-02-02 | 重庆市大足区通达铁路车辆配件制造有限公司 | T-shaped chute pedestal board manufacturing method |
| CN105665639A (en) * | 2016-02-23 | 2016-06-15 | 重庆市大足区通达铁路车辆配件制造有限公司 | Manufacturing method for movable device of cast steel curved support |
| CN105665639B (en) * | 2016-02-23 | 2018-02-02 | 重庆市大足区通达铁路车辆配件制造有限公司 | Cast steel curve support head preparation method |
| CN105598370A (en) * | 2016-02-23 | 2016-05-25 | 重庆市大足区通达铁路车辆配件制造有限公司 | Manufacturing method of T-type sliding groove base plate |
| CN106825442A (en) * | 2016-12-28 | 2017-06-13 | 重庆市九明机械制造有限公司 | Sandbox vibrating device |
| CN106825411A (en) * | 2017-01-17 | 2017-06-13 | 四川维珍高新材料有限公司 | A kind of super-low carbon stainless steel lost foam casting process |
| CN109550889A (en) * | 2017-09-25 | 2019-04-02 | 高淳县龙宁精密铸造有限公司 | Chief axis evaporative pattern and its method for casting main shaft ram |
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| CN110252948A (en) * | 2019-06-27 | 2019-09-20 | 共享装备股份有限公司 | A kind of evaporative pattern is first burnt pours casting method afterwards |
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| CN113714465A (en) * | 2020-12-25 | 2021-11-30 | 宁夏军浩机械设备制造有限公司 | Lost foam casting mold and casting method |
| CN113865348A (en) * | 2021-10-13 | 2021-12-31 | 陕西远大新材料技术有限公司 | Lost foam shell-shaped furnace liner for electric furnace lining and use method thereof |
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| CN114769519A (en) * | 2022-03-31 | 2022-07-22 | 沈阳工业大学 | Preparation method and equipment for lost foam casting nodular cast iron material |
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| CN115090835B (en) * | 2022-06-22 | 2023-12-29 | 繁峙县志高矿山机械有限责任公司 | Precise casting process of hardware castings |
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Application publication date: 20141126 |