CN102601347B - Casting device and method of coated magnesium alloy casting by using in-mould spraying method - Google Patents
Casting device and method of coated magnesium alloy casting by using in-mould spraying method Download PDFInfo
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- CN102601347B CN102601347B CN201210127829.9A CN201210127829A CN102601347B CN 102601347 B CN102601347 B CN 102601347B CN 201210127829 A CN201210127829 A CN 201210127829A CN 102601347 B CN102601347 B CN 102601347B
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Abstract
The invention discloses a casting device of a coated magnesium alloy casting by using an in-mould spraying method, comprising a mould device, a spraying system, an exhaust system, a pouring device and a control device; a stationary mould is provided with an inner-layer molten metal sprue gate; the spraying system comprises an electric arc spraying gun, an electric arc spraying power supply, an air compressor, a spraying wire and other accessories; the exhaust system comprises an exhaust brick and an exhaust groove; the pouring device comprises a heat preserving furnace, an electromagnetic pump and an infusion tube; and the control device comprises a control valve and other accessories. Meanwhile, the invention also discloses a casting method of the coated magnesium alloy casting by using the in-mould spraying method. According to the casting device and method of the coated magnesium alloy casting by using the in-mould spraying method, provided by the invention, coating metal is sprayed on the surface of a mold cavity, and inner-layer metal is poured so that the coated magnesium alloy casting is obtained; and spraying pretreatment and the operation on the device are simple, the device is good in environment friendliness, and the magnesium alloy casting with complex shape and high surface size precision can be obtained.
Description
Technical field
The present invention relates to spray coating type Mg alloy castings casting device and casting method thereof in a kind of mould, belong to magnesium alloy cast field.
Background technology
Magnesium alloy is as the commercial metal engineering material of lightweight, because it has that density is little, specific stiffness and specific strength is high, damping shock-absorbing noise-reducing ability strong, liquid forming superior performance, can electromagnetic radiation shielding and be easy to the feature of a series of the meeting such as recyclings " green structural material of 21 century ", the fields such as it is particularly suitable at vehicles such as automobile, motorcycles with computer, communicates by letter, instrument and meter, household electrical appliances, light industry, military affairs are applied.Yet the chemical property of (1) magnesium alloy is active, corrosion resistance is poor, easily corrosion under moist environment, and this makes magnesium alloy have higher requirement to applied environment, and this is the one of the main reasons that restriction magnesium alloy is generally applied.(2) poor heat resistance, the fusing point of magnesium alloy is lower, the operating temperature of general Mg-Al alloy generally can not be over 120 ℃, and the operating temperature of high-temperature component such as automobile power parts will reach 150 ℃, the operating temperature range that this has surpassed conventional magnesium alloy, has limited the application of magnesium alloy under higher temperature.Therefore, in order to improve the existing main methods of surfacecti proteon work of magnesium and alloy thereof, mainly contain chemical composition coating, differential arc oxidation processing, various organic coating, Implantation, vapor phase deposition, fuse and apply to face by laser light, surface spraying etc.
In prior art, Chinese patent 201110417990.5 discloses " a kind of method of spraying aluminum coating on surface of magnesium alloy ", the method acetone oil removing, blast is processed magnesium alloy member to be sprayed, coarse to surface uniform, without metallic luster, utilize HVAF technology in Mg alloy surface deposition of aluminum coating.Chinese Patent Application No. 200510029884.4 discloses " vacuum sucking cast process of preparing of magnesium base composite material ", the method is fixed on the formwork of preheating on dividing plate with formwork fixed cover, then formwork mouth passes into protective gas, open the stop valve being connected with vacuum, in sealing die cavity, vacuumize, after reaching Vacuum Balance, keep, rapidly by concise good magnesium base composite material melt cast in formwork die cavity, make magnesium base composite material molten metal at vacuum retrofilling formwork die cavity, keep vacuum until solidify completely, remove formwork, finally obtain thin-walled, complicated magnesium alloy materials foundry goods.
In current commercial Application, the form production that Mg alloy castings generally applies to carry out surface after homogenous material casting again, dimensional accuracy and surface smoothness are difficult to guarantee.
Summary of the invention
For weak point of the prior art, one of the object of the invention is to provide a kind of mould easy and simple to handle, with low cost, that the feature of environmental protection is good interior spraying process cladded type casting device.
Two of the object of the invention is to provide spraying process cladded type Mg alloy castings casting method in the mould that a kind of dimensional accuracy is high.
One of object of the present invention is achieved through the following technical solutions:
A spraying process cladded type Mg alloy castings casting device in mould, comprises die device, paint finishing, gas extraction system, apparatus for pouring and control device;
Described die device comprises the dynamic model being arranged on moving platen and is arranged on the cover half on solid plate, is provided with inner layer metal liquid sprue gate on cover half;
Described paint finishing comprises arc spray gun, electrical arc spraying power source, air compressor machine, spraying wire and other annexes;
Described gas extraction system comprises and is arranged on the air discharge duct communicating with die cavity on dynamic model and is arranged near exhaust brick cover half inner layer metal liquid sprue gate, and described exhaust brick is made by resin sand, and described die cavity communicates with the external world by exhaust brick and air discharge duct;
Described apparatus for pouring comprises holding furnace, electromagnetic pump, woven hose; The inlet of described electromagnetic pump is communicated with the liquid outlet of holding furnace, and one end of described woven hose is communicated with the liquid outlet of electromagnetic pump, and the other end of woven hose is connected with pouring metal melt mouth and is communicated with die cavity by inner layer metal liquid sprue gate; Described electromagnetic pump, woven hose, pouring metal melt mouth all adopt heating and thermal insulation material parcel.
Described control device comprises control valve and other annexes, and described control valve is arranged on woven hose and near inner layer metal liquid sprue gate.
Two of object of the present invention is achieved through the following technical solutions:
A spraying process cladded type Mg alloy castings casting method in mould, its detailed step is as follows:
(1) on dynamic model and cover half, apply respectively coating;
(2) utilize electric arc spraying equipment, in conjunction with required surface performance, select corresponding silk material to die cavity inner-wall spraying, alloy layer thickness is controlled by the spray time of spraying process;
(3) mould is fixed on support;
(4) inlet of electromagnetic pump is communicated with the liquid outlet of holding furnace, one end of woven hose is communicated with the liquid outlet of electromagnetic pump, the other end of woven hose is communicated with die cavity by the inner layer metal liquid sprue gate being arranged on cover half, and control valve is arranged on woven hose and near inner layer metal liquid sprue gate;
(5) first open control valve, then open electromagnetic pump, the magnesium alloy molten metal in holding furnace enters in die cavity and is full of die cavity;
(6) treat the magnesium alloy molten metal cooled and solidified in die cavity, close electromagnetic pump, treat that the remaining molten metal in woven hose returns in holding furnace, closed control valve;
(7) die sinking is taken out foundry goods in die cavity, thereby obtains cladded type Mg alloy castings;
Compared with prior art, in a kind of mould of the present invention, spraying process cladded type Mg alloy castings and casting method tool thereof have the following advantages:
(1) spraying process cladded type Mg alloy castings casting device and casting method thereof in a kind of mould provided by the invention, the coating that different sprayed on material form at Mg alloy surface can play the characteristics such as anticorrosion, heat insulation, rub resistance.
(2) spraying process cladded type Mg alloy castings casting device and casting method thereof in a kind of mould provided by the invention, finally can obtain the cladded type foundry goods of surface configuration complexity, and casting dimension accuracy is high, and surface smoothness is good.
(3) spraying process cladded type Mg alloy castings casting device and casting method thereof in mould provided by the invention, complete the coated combination of molten metal and coating in die cavity inside, and spraying pre-treatment and device are simple to operate, and the feature of environmental protection is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of spraying process cladded type Mg alloy castings casting device in a kind of mould;
In accompanying drawing: 1-holding furnace; 2-molten metal; 3-electromagnetic pump; 4-woven hose; 5-control valve; 6-cover half; 7-exhaust turns; 8-dynamic model; 9-outgassing groove; 10-pouring metal melt mouth.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
As shown in Figure 1, in a kind of mould, spraying process cladded type Mg alloy castings casting device comprises: die device, paint finishing, gas extraction system, apparatus for pouring and control device.
Die device comprises the cover half being arranged on solid plate and is arranged on the dynamic model on moving platen.
Paint finishing comprises arc spray gun, electrical arc spraying power source, air compressor machine, spraying wire and other annexes, select as required required spraying wire, the fusing point of selected silk material need be higher than the fusing point of inner layer metal liquid, spraying process is grasped the thickness of alloy-layer according to spray time, coating as far as possible evenly.
Gas extraction system mainly comprises the air discharge duct 9 communicating with die cavity on dynamic model, in order to discharge the gas in die cavity in cast fashion, gas extraction system also comprises the exhaust brick 7 being arranged on cover half 6 and in the exhaust brick mounting groove arranging near inner layer metal liquid sprue gate 10, the exhaust brick 7 of being made by resin sand is installed in exhaust brick mounting groove, and die cavity is by exhaust brick 7 and air discharge duct 9 and communicate with the external world.
Apparatus for pouring comprises holding furnace 1, electromagnetic pump 3, woven hose 4, control valve 5.The inlet of electromagnetic pump 3 is communicated with the liquid outlet of holding furnace 1, one end of woven hose 4 is communicated with the liquid outlet of electromagnetic pump 3, the other end of woven hose 4 is communicated with die cavity by the inner layer metal liquid sprue gate 10 being arranged on cover half, and control valve 5 is arranged on woven hose 4 and near inner layer metal liquid sprue gate 10.In order to guarantee that molten metal residual metallic liquid after casting mold solidified inside can not stop up woven hose 4, at the outer heating and thermal insulation layer that is all coated with of woven hose 4, control valve 5 and electromagnetic pump 3.
Control device comprises control valve 5 and other annexes, is arranged on woven hose 4 tops near molten metal inlet 10 positions.
A spraying process cladded type Mg alloy castings casting method in mould, the method be take AZ91D as parent metal liquid, and outer coating is that spelter coating is example, and concrete steps are as follows:
(1) on dynamic model 8 and cover half 6, apply respectively coating;
(2) use wire drawing type electric arc spraying rifle to coating surface spraying zinc coating in die cavity, coating layer thickness is controlled according to spray time, guarantees as far as possible the uniformity of coating;
(3) mould is fixed on support;
(4) inlet of electromagnetic pump 3 is communicated with the liquid outlet of holding furnace 1, one end of woven hose 4 is communicated with the liquid outlet of electromagnetic pump 3, the other end of woven hose 4 is communicated with die cavity by the inner layer metal liquid sprue gate 10 being arranged on cover half, and control valve 5 is arranged on woven hose 4 and near inner layer metal liquid sprue gate 10.To woven hose 4, electromagnetic pump 3, the coated heating and thermal insulation layer of control valve 5;
(5) opening controlling valve 5 and electromagnetic pump 3, enter in die cavity the molten metal in holding furnace;
(6) treat the magnesium alloy molten metal cooled and solidified in die cavity, close electromagnetic pump 3, treat that the remaining molten metal in woven hose 4 returns in holding furnace 1, closed control valve 5;
(7) die sinking, takes out foundry goods, thereby obtains a kind of cladded type Mg alloy castings;
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of the technical program, it all should be encompassed in the middle of claim scope of the present invention.
Claims (1)
1. a spraying process cladded type Mg alloy castings casting method in mould, is characterized in that, comprises the steps:
(1) on dynamic model (8) and cover half (6), apply respectively coating;
(2) with arc spray gun, directly die cavity inner surface is sprayed to alloy-layer;
(3) mould is fixed on support;
(4) inlet of electromagnetic pump (3) is communicated with the liquid outlet of holding furnace (1), one end of woven hose (4) is communicated with the liquid outlet of electromagnetic pump (3), the other end of woven hose (4) is communicated with die cavity by the inner layer metal liquid sprue gate (10) being arranged on cover half, control valve (5) is arranged on to woven hose (4) upper also near inner layer metal liquid sprue gate (10); To the coated heating and thermal insulation material of the skin of woven hose (4), electromagnetic pump (3), control valve (5);
(5) opening controlling valve (5) and electromagnetic pump (3), enter in die cavity the inner layer metal liquid in holding furnace, and the fusing point of arc spray gun spraying wire is higher than the fusing point of inner layer metal liquid;
(6) treat the molten metal cooled and solidified in die cavity, close electromagnetic pump (3), treat that the remaining molten metal in woven hose (4) returns in holding furnace (1), closed control valve (5);
(7) die sinking, takes out foundry goods, thereby obtains cladded type Mg alloy castings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210127829.9A CN102601347B (en) | 2012-04-27 | 2012-04-27 | Casting device and method of coated magnesium alloy casting by using in-mould spraying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210127829.9A CN102601347B (en) | 2012-04-27 | 2012-04-27 | Casting device and method of coated magnesium alloy casting by using in-mould spraying method |
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| CN102601347A CN102601347A (en) | 2012-07-25 |
| CN102601347B true CN102601347B (en) | 2014-04-23 |
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| CN110681853B (en) * | 2019-10-18 | 2021-08-24 | 广西金桦启门窗有限公司 | Door industry manufacturing equipment and processing technology thereof |
| WO2021131294A1 (en) * | 2019-12-23 | 2021-07-01 | 本田金属技術株式会社 | Aluminum casting method and mold |
| CN113199010A (en) * | 2021-04-26 | 2021-08-03 | 中国兵器工业第五九研究所 | Method for alloying magnesium element on surface layer of aluminum alloy casting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1354055A (en) * | 2001-10-24 | 2002-06-19 | 西安交通大学 | Surface alloying process of magnesium alloy in course of solidification |
| CN101927333A (en) * | 2010-09-02 | 2010-12-29 | 许小忠 | Magnesium alloy electromagnetic pump quantitative casting furnace |
| CN201791950U (en) * | 2010-09-02 | 2011-04-13 | 许小忠 | Low-pressure filling and high-pressure solidifying molding system for magnesium alloy hub electromagnetic pump |
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2012
- 2012-04-27 CN CN201210127829.9A patent/CN102601347B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1354055A (en) * | 2001-10-24 | 2002-06-19 | 西安交通大学 | Surface alloying process of magnesium alloy in course of solidification |
| CN101927333A (en) * | 2010-09-02 | 2010-12-29 | 许小忠 | Magnesium alloy electromagnetic pump quantitative casting furnace |
| CN201791950U (en) * | 2010-09-02 | 2011-04-13 | 许小忠 | Low-pressure filling and high-pressure solidifying molding system for magnesium alloy hub electromagnetic pump |
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