CN102091772A - Low-pressure casting method for large casting - Google Patents
Low-pressure casting method for large casting Download PDFInfo
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- CN102091772A CN102091772A CN 201110062472 CN201110062472A CN102091772A CN 102091772 A CN102091772 A CN 102091772A CN 201110062472 CN201110062472 CN 201110062472 CN 201110062472 A CN201110062472 A CN 201110062472A CN 102091772 A CN102091772 A CN 102091772A
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Abstract
The invention relates to a low-pressure casting method for a large casting. More than two crucible melting holding furnaces are adopted, and each crucible melting holding furnace is provided with a liquid rising pipe. The space between the crucible melting holding furnaces is adjusted according to the position of the downgate of a casting. During low-pressure casting, the casting is hung on a low-pressure casting furnace, a low-pressure casting controlling device is started, aluminum liquid is introduced to the casting at the speed and pressure required by the process, and the pressure is maintained to finish casting.
Description
Technical field
What the present invention relates to is a kind of heavy castings (overlength or overweight) low-pressure casting method that is used for, and belongs to metal material and liquid condition shaping field.
Background technology
Low pressure casting is to utilize gas pressure that molten metal is pressed into casting mold, and under certain pressure a kind of casting method of crystallization and freezing, because molten metal from bottom to top, steadily rise, can not produce when filling type and splash atmosphere, adjustable in pressure, do not need riser feeding, casting quality is good, and the product yield height is specially adapted to light-alloys such as aluminium, magnesium.Be generally used for middle-size and small-size foundry goods.
Upgrading along with industrial products, many overlength, overweight (aluminium, the Mg alloy castings of length 4000～5000mm, weight 800～1200kg) design, their complex geometry, wall thickness differs greatly, since be used for special occasions, the requirement of strength height, and very high air-tightness requirement is often arranged, traditional sand mold gravity-assist pouring can't be satisfied, and must adopt low pressure casting.
The actual low-pressure die casting plant that adopts has two classes in the industrial production at present, one class is that the crucible capacity is the four column air injection machines of 200～500kg, mainly produce wheel hub, cylinder block, cylinder head auto parts and components with metal mold, another kind of is that the holding furnace crucible capacity of the sand mold low pressure casting that developed in recent years is 200～600kg.
Surpass 2000mm for length, the foundry goods that single-piece weight surpasses 550kg certainly will need to make bigger crucible for smelting stove, and horizontal runway is long, and temperature descends obviously in aluminium, the magnesium alloy cavity filling process, the oxidation aggravation, and the air-tightness of foundry goods and intensity can not get guaranteeing.
Summary of the invention
The present invention provides a kind of simple and easy to do method for addressing the above problem, and utilizes existing crucible for smelting holding furnace, produces heavy castings.Technical scheme of the present invention is as follows:
1. adopt two above crucible melting holding furnaces, a stalk is arranged on every stove, according to the spacing of the down gate position adjustments crucible melting holding furnace of casting mold.
2. transform existing low pressure casting control system, make it can control two or many melting ﹠ holding furnaces and pour into a mould simultaneously, realize that port waters big part.
Description of drawings
Fig. 1 fills type figure for the two stalks of twin furnace
1A, 1B are two independent melting ﹠ holding furnaces, and capacity is aluminium liquid 600kg.
2A, 2B are the work top of melting ﹠ holding furnace.
3A, 3B are two stalks in the melting ﹠ holding furnace
4 is the stalk sealing gasket
5 is casting mold, casting length 4700mm, predominant tube diameter Φ 650mm.4 arms are arranged, and diameter is Φ 500mm,
Casting section thickness 15mm, the thick 50mm of flange.
Fig. 2 is the air-path control system of low pressure casting
The specific embodiment
1. the distance of two down gates in the measurement casting mold is regulated melting ﹠ holding furnace 1A, 1B by this requirement, and its stalk 3A, 3B centre-to-centre spacing are coincide therewith.Regulate the height of two melting ﹠ holding furnaces, the work top 2A, the 2B that make two stoves are on same-horizontal plane.
2. transform the control air-channel system of low pressure casting, as shown in Figure 2, this device source of the gas 1a adopts compressed air, and bleed pressure is 0.6～0.8MPa, and compressed air enters pressure regulator valve 4a behind oil water separator 2a, air dryer 3a.Pressure regulation is regulated pressure in the smelting furnace by manual aciculiform control valve 5a behind the 0.25MPa, enters melting ﹠ holding furnace 7a, 7b through bifurcated pipe 6a again, and 8a, 8b are pressure display instrument table (for accurate demonstration, this programme is selected mercury column manometer for use).
3. after the melting of aluminium liquid arrives temperature, cover separately work top 2A, 2B, put into stalk 3A, 3B, on the stalk flange face, put sealing gasket 4.
4. casting mold is hung 2A, 2B on the work top of melting and heat preservation stove, note down gate and stalk position alignment in the casting mold.
5. bleed pressure is adjusted to required operating pressure, regulates hand control valve 5a, by predetermined low-pressure casting process, parameter enters and heats up-fill type-packing stage, during examine record furnace pressure situation of change (also can adopt the automatic recording curve of instrument).
6. casting mold is hung away in release behind the casting complete.
Claims (1)
1. the low-pressure casting method of heavy castings is characterized in that adopting two above crucible melting holding furnaces, and the root stalk is arranged on every stove, according to the spacing of the down gate position adjustments crucible melting holding furnace of casting mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110062472 CN102091772A (en) | 2011-03-10 | 2011-03-10 | Low-pressure casting method for large casting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110062472 CN102091772A (en) | 2011-03-10 | 2011-03-10 | Low-pressure casting method for large casting |
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| CN102091772A true CN102091772A (en) | 2011-06-15 |
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| CN 201110062472 Pending CN102091772A (en) | 2011-03-10 | 2011-03-10 | Low-pressure casting method for large casting |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463336A (en) * | 2011-12-20 | 2012-05-23 | 江苏凯特汽车部件有限公司 | Novel pressure device for finely turned bright aluminum alloy wheel |
| CN105414529A (en) * | 2015-11-20 | 2016-03-23 | 烟台三和新能源科技股份有限公司 | Aluminum alloy electric box and machining method thereof |
| CN105935762A (en) * | 2016-06-22 | 2016-09-14 | 南通爱尔思轻合金精密成型有限公司 | Multi-furnace and multi-liquid-rise-pipe molten aluminum mold filling method structure for sand mold low-pressure cast gas-tight thin-walled shells |
| CN107138680A (en) * | 2017-06-13 | 2017-09-08 | 鹰普航空零部件（无锡）有限公司 | Efficient aluminium alloy fusible pattern low pressure casting production method |
| WO2018045809A1 (en) * | 2016-09-07 | 2018-03-15 | 上海华培动力科技股份有限公司 | Adjusted pressure casting method for producing black metal cast |
| CN108637219A (en) * | 2018-08-01 | 2018-10-12 | 中国兵器工业第五九研究所 | A kind of independent liquid level pressurizing control system and method for multidigit parallel connection compression casting device |
| CN108941514A (en) * | 2018-08-01 | 2018-12-07 | 中国兵器工业第五九研究所 | A kind of casting method for large-scale corrosion resistant aluminium magnesium alloy component |
| CN109420752A (en) * | 2017-09-01 | 2019-03-05 | 库尔兹股份有限公司 | Low-pressure die casting plant |
| CN113878105A (en) * | 2021-09-30 | 2022-01-04 | 上海交通大学 | Double-channel pressure-regulating casting method and system for in-situ authigenic aluminum-based composite material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337271A (en) * | 2007-07-08 | 2009-01-07 | 欧阳明 | Casting technique capable of melting, transferring and precisely quantitatively feeding metal and device thereof |
| CN201308983Y (en) * | 2008-10-30 | 2009-09-16 | 张永安 | Multi-cavity low-pressure casting press vane wheel device |
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2011
- 2011-03-10 CN CN 201110062472 patent/CN102091772A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337271A (en) * | 2007-07-08 | 2009-01-07 | 欧阳明 | Casting technique capable of melting, transferring and precisely quantitatively feeding metal and device thereof |
| CN201308983Y (en) * | 2008-10-30 | 2009-09-16 | 张永安 | Multi-cavity low-pressure casting press vane wheel device |
Non-Patent Citations (1)
| Title |
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| 《现代机械》 19781231 朱奕庆 国外低压铸造工艺发展概沉 54-69 1 , 第3期 2 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463336A (en) * | 2011-12-20 | 2012-05-23 | 江苏凯特汽车部件有限公司 | Novel pressure device for finely turned bright aluminum alloy wheel |
| CN105414529A (en) * | 2015-11-20 | 2016-03-23 | 烟台三和新能源科技股份有限公司 | Aluminum alloy electric box and machining method thereof |
| CN105935762A (en) * | 2016-06-22 | 2016-09-14 | 南通爱尔思轻合金精密成型有限公司 | Multi-furnace and multi-liquid-rise-pipe molten aluminum mold filling method structure for sand mold low-pressure cast gas-tight thin-walled shells |
| WO2018045809A1 (en) * | 2016-09-07 | 2018-03-15 | 上海华培动力科技股份有限公司 | Adjusted pressure casting method for producing black metal cast |
| CN107138680A (en) * | 2017-06-13 | 2017-09-08 | 鹰普航空零部件（无锡）有限公司 | Efficient aluminium alloy fusible pattern low pressure casting production method |
| CN109420752A (en) * | 2017-09-01 | 2019-03-05 | 库尔兹股份有限公司 | Low-pressure die casting plant |
| CN108637219A (en) * | 2018-08-01 | 2018-10-12 | 中国兵器工业第五九研究所 | A kind of independent liquid level pressurizing control system and method for multidigit parallel connection compression casting device |
| CN108941514A (en) * | 2018-08-01 | 2018-12-07 | 中国兵器工业第五九研究所 | A kind of casting method for large-scale corrosion resistant aluminium magnesium alloy component |
| CN113878105A (en) * | 2021-09-30 | 2022-01-04 | 上海交通大学 | Double-channel pressure-regulating casting method and system for in-situ authigenic aluminum-based composite material |
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Application publication date: 20110615 |