CN103691916A - Casting method for protecting thin-wall casting from local isolated hot spot shrinkage - Google Patents
Casting method for protecting thin-wall casting from local isolated hot spot shrinkage Download PDFInfo
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- CN103691916A CN103691916A CN201310722764.7A CN201310722764A CN103691916A CN 103691916 A CN103691916 A CN 103691916A CN 201310722764 A CN201310722764 A CN 201310722764A CN 103691916 A CN103691916 A CN 103691916A
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Abstract
The invention discloses a casting method for protecting a thin-wall casting from local isolated hot spot shrinkage. The casting method comprises the steps of manufacturing a sand core; manufacturing a corresponding densener die; utilizing the densener die to obtain an aluminum alloy densener; enabling the aluminum alloy densener to adhere to a corresponding isolated hot spot part of the sand core; manufacturing molten aluminum; placing the sand core in a cavity of a thin-wall casting die; pouring the molten aluminum into the cavity of the thin-wall casting die, and forming a casting by cooling; and performing operation of removing the sand core and a casting head to obtain the finished product thin-wall casting. The hot spot part is subject to chilling through the densener, so that the hot spot first is solidified, and the shortcoming of shrinkage is overcome.
Description
Technical field
The present invention relates to field of metal casting technology, relate in particular to the casting method that a kind of thin-wall aluminum-alloy part prevents partial isolated thermal center shrinkage porosite.
Background technology
At present, for using riser feeding, and thermal center part partly forms by core, cannot adopt the thin wall component of water-cooled measure, and in casting process, shrinkage defect easily appears in its isolated heat energy-saving position, is therefore difficult to obtain castings.For example: 12L middle cooling pipe is the critical component of large-sized diesel motor, weight 3.2Kg, material is AlSi9Cu1, wall thickness 4.5mm, its inner chamber has the Φ 16mm of a place boss.In casting process, this boss cannot be taked conventional riser feeding and cooling water Quench, causes this boss to produce shrinkage defect and causes foundry goods to produce leakage.As shown in Figure 1, it is the profile of middle cooling pipe part, on figure, show the isolated thick large thermal center in a place on part, its wall thickness and peripheral part wall thickness difference are larger, during casting, the part of thin-walled is first solidified, thick large part after coagulation, and the thick major part of after coagulation because of volume contraction and not quite supplementary aluminium liquid, therefore thick large part just there will be shrinkage defect.
Therefore, how to prevent partial isolated thermal center shrinkage porosite, obtaining qualified thin-section casting is that the applicant is devoted to the problem solving.
Summary of the invention
The object of the present invention is to provide a kind of thin-section casting to prevent the casting method of partial isolated thermal center shrinkage porosite, by chill, heat energy-saving position is carried out to Quench, this thermal center is solidified in advance, avoid occurring shrinkage defect, thereby obtain castings.
The technical scheme that realizes above-mentioned purpose is:
Thin-section casting prevents a casting method for partial isolated thermal center shrinkage porosite, comprises step:
Step S1, makes for casting the core of thin-section casting;
Step S2, according to the shape of the isolated thermal center of thin-section casting, makes corresponding chill mould;
Step S3, utilizes described chill mould, obtains the aluminium alloy chill that the isolated thermal center with thin-section casting agrees with mutually;
Step S4, bonds to by described aluminium alloy chill the isolated heat energy-saving position that described core is corresponding;
Step S5, drops into smelting furnace by aluminium alloy melt and turns to liquid, and by aluminium liquid treatment process, obtain clean aluminium liquid in the temperature of 700 ℃-750 ℃;
Step S6, the core that step S4 is obtained is lowered to the die cavity of thin-section casting mould;
Step S7, is poured into described aluminium liquid on the die cavity of thin-section casting mould cooling formation foundry goods;
Step S8, the operation that step S7 gained foundry goods is removed to core and dead head, obtains the thin-section casting of finished product.
Above-mentioned thin-section casting prevents the casting method of partial isolated thermal center shrinkage porosite, and wherein, the aluminium alloy chill volume obtaining in described step S3 is greater than or equal to 3 times of isolated thermal center part of thin-section casting.
Above-mentioned thin-section casting prevents the casting method of partial isolated thermal center shrinkage porosite, and wherein, the aluminium alloy chill obtaining in described step S3 can reuse.
Above-mentioned thin-section casting prevents the casting method of partial isolated thermal center shrinkage porosite, and wherein, in described step S4, to bond to the binding agent that isolated heat energy-saving position that described core is corresponding uses be cold-patching tube gum to aluminium alloy chill.
The invention has the beneficial effects as follows: the aluminium alloy chill that the present invention agrees with mutually by the isolated thermal center made from thin-section casting, due to the characteristic that chill temperature is low, heat conduction is fast, make by chill, heat energy-saving position to be carried out to chilling action in casting process, this thermal center is solidified in advance, avoid occurring shrinkage defect, thereby obtain castings.Meanwhile, by the accurate control of rational procedure arrangement and process conditions, when having improved work situation condition, reduce operator's labour intensity, improved production efficiency.
Accompanying drawing explanation
Fig. 1 is the profile of middle cooling pipe part;
Fig. 2 is the flow chart that thin-section casting of the present invention prevents the casting method of partial isolated thermal center shrinkage porosite;
Fig. 3 a, Fig. 3 b and Fig. 3 C are respectively front view, side view and the upward views of the aluminium alloy chill of embodiment in the present invention;
Fig. 4 is core and the chill assembly drawing of embodiment in the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Refer to Fig. 2, Fig. 3 and Fig. 4, thin-section casting of the present invention prevents the casting method of partial isolated thermal center shrinkage porosite, comprises the following steps:
Step S1, makes for casting the core of thin-section casting; In the present embodiment, it is example that thin-section casting is selected middle cooling pipe, as shown in Figure 1;
Step S2, according to the shape of the isolated thermal center of thin-section casting, makes corresponding chill mould;
Step S3, utilizes chill mould, obtains the aluminium alloy chill that the isolated thermal center with thin-section casting agrees with mutually, as shown in Fig. 3 a, Fig. 3 b and Fig. 3 C; And aluminium alloy chill volume is greater than or equal to 3 times of isolated thermal center part of thin-section casting, because volume is larger, heat storage capacity is stronger, and its chill effect is better;
Step S4, bonds to by aluminium alloy chill the isolated heat energy-saving position that core is corresponding, and as shown in Figure 4, the binding agent using is cold-patching tube gum, and at high temperature gas forming amount is little for this kind of binding agent, and foundry goods is difficult for producing the defects such as pore;
Step S5, drops into smelting furnace by aluminium alloy melt and turns to liquid, and by aluminium liquid treatment process, obtain clean aluminium liquid in the temperature of 700 ℃-750 ℃;
Step S6, the core that step S4 is obtained is lowered to the die cavity of thin-section casting mould;
Step S7, is poured into described aluminium liquid the die cavity of thin-section casting mould, and aluminium liquid is in the cooling procedure of mold cavity, because aluminium alloy chill temperature is low, heat conduction is fast, after aluminium liquid contacts with chill, the quick cooled and solidified of energy, avoids occurring shrinkage defect, thereby forms qualified foundry goods;
Step S8, the operation that step S7 gained foundry goods is removed to core and dead head, obtains the thin-section casting of finished product.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (4)
1. thin-section casting prevents a casting method for partial isolated thermal center shrinkage porosite, it is characterized in that, comprises step:
Step S1, makes for casting the core of thin-section casting;
Step S2, according to the shape of the isolated thermal center of thin-section casting, makes corresponding chill mould;
Step S3, utilizes described chill mould, obtains the aluminium alloy chill that the isolated thermal center with thin-section casting agrees with mutually;
Step S4, bonds to by described aluminium alloy chill the isolated heat energy-saving position that described core is corresponding;
Step S5, drops into smelting furnace by aluminium alloy melt and turns to liquid, and by aluminium liquid treatment process, obtain clean aluminium liquid in the temperature of 700 ℃-750 ℃;
Step S6, the core that step S4 is obtained is lowered to the die cavity of thin-section casting mould;
Step S7, is poured into described aluminium liquid on the die cavity of thin-section casting mould cooling formation foundry goods;
Step S8, the operation that step S7 gained foundry goods is removed to core and dead head, obtains the thin-section casting of finished product.
2. thin-section casting according to claim 1 prevents the casting method of partial isolated thermal center shrinkage porosite, it is characterized in that, the aluminium alloy chill volume obtaining in described step S3 is greater than or equal to 3 times of isolated thermal center part of thin-section casting.
3. thin-section casting according to claim 1 prevents the casting method of partial isolated thermal center shrinkage porosite, it is characterized in that, the aluminium alloy chill obtaining in described step S3 can reuse.
4. thin-section casting according to claim 1 prevents the casting method of partial isolated thermal center shrinkage porosite, it is characterized in that, in described step S4, to bond to the binding agent that isolated heat energy-saving position that described core is corresponding uses be cold-patching tube gum to aluminium alloy chill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310722764.7A CN103691916A (en) | 2013-12-24 | 2013-12-24 | Casting method for protecting thin-wall casting from local isolated hot spot shrinkage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310722764.7A CN103691916A (en) | 2013-12-24 | 2013-12-24 | Casting method for protecting thin-wall casting from local isolated hot spot shrinkage |
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| CN103691916A true CN103691916A (en) | 2014-04-02 |
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| CN201310722764.7A Pending CN103691916A (en) | 2013-12-24 | 2013-12-24 | Casting method for protecting thin-wall casting from local isolated hot spot shrinkage |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439199A (en) * | 2014-11-21 | 2015-03-25 | 安徽涌诚机械有限公司 | Robot base and frame casting process |
| CN107282892A (en) * | 2017-07-21 | 2017-10-24 | 北京航星机器制造有限公司 | A kind of 3D printing core formative method of aluminium alloy castings |
| CN107400793A (en) * | 2017-07-26 | 2017-11-28 | 泰安和新精工科技有限公司 | A kind of aluminium alloy wheel hub gravity foundry technology |
| CN108213352A (en) * | 2016-12-14 | 2018-06-29 | 浙江强广剑精密铸造股份有限公司 | A kind of water-cooled motor shell casting method |
| CN113239587A (en) * | 2021-05-12 | 2021-08-10 | 宁波九寰适创科技有限公司 | Shrinkage cavity and shrinkage porosity prediction method for hot chamber die casting |
| CN113333684A (en) * | 2021-05-24 | 2021-09-03 | 东风锻造有限公司 | Process for solving shrinkage porosity of isolated hot node center of vertical casting cylinder cover by using graphite chill |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2510203Y (en) * | 2001-11-15 | 2002-09-11 | 赵强 | Anti-heat crack and shrikage-porosity composite core special for aluminium-copper alloy casting |
| CN1386602A (en) * | 2001-12-13 | 2002-12-25 | 赵强 | Low-pressure technology for casting Al-Cu alloy part with metal mould |
| CN103182471A (en) * | 2011-12-30 | 2013-07-03 | 上海爱仕达汽车零部件有限公司 | Casting technology for vacuum pump box body |
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2013
- 2013-12-24 CN CN201310722764.7A patent/CN103691916A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2510203Y (en) * | 2001-11-15 | 2002-09-11 | 赵强 | Anti-heat crack and shrikage-porosity composite core special for aluminium-copper alloy casting |
| CN1386602A (en) * | 2001-12-13 | 2002-12-25 | 赵强 | Low-pressure technology for casting Al-Cu alloy part with metal mould |
| CN103182471A (en) * | 2011-12-30 | 2013-07-03 | 上海爱仕达汽车零部件有限公司 | Casting technology for vacuum pump box body |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439199A (en) * | 2014-11-21 | 2015-03-25 | 安徽涌诚机械有限公司 | Robot base and frame casting process |
| CN108213352A (en) * | 2016-12-14 | 2018-06-29 | 浙江强广剑精密铸造股份有限公司 | A kind of water-cooled motor shell casting method |
| CN107282892A (en) * | 2017-07-21 | 2017-10-24 | 北京航星机器制造有限公司 | A kind of 3D printing core formative method of aluminium alloy castings |
| CN107400793A (en) * | 2017-07-26 | 2017-11-28 | 泰安和新精工科技有限公司 | A kind of aluminium alloy wheel hub gravity foundry technology |
| CN113239587A (en) * | 2021-05-12 | 2021-08-10 | 宁波九寰适创科技有限公司 | Shrinkage cavity and shrinkage porosity prediction method for hot chamber die casting |
| CN113239587B (en) * | 2021-05-12 | 2022-09-09 | 宁波九寰适创科技有限公司 | Shrinkage cavity and shrinkage porosity prediction method for hot chamber die casting |
| CN113333684A (en) * | 2021-05-24 | 2021-09-03 | 东风锻造有限公司 | Process for solving shrinkage porosity of isolated hot node center of vertical casting cylinder cover by using graphite chill |
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Application publication date: 20140402 |