CN1323783C - Magnesium alloy hub pressure casting apparatus and method thereof - Google Patents
Magnesium alloy hub pressure casting apparatus and method thereof Download PDFInfo
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- CN1323783C CN1323783C CNB021358850A CN02135885A CN1323783C CN 1323783 C CN1323783 C CN 1323783C CN B021358850 A CNB021358850 A CN B021358850A CN 02135885 A CN02135885 A CN 02135885A CN 1323783 C CN1323783 C CN 1323783C
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- Prior art keywords
- magnesium alloy
- pressure
- infusion pump
- liquation
- alloy liquation
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 52
- 238000005266 casting Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000001802 infusion Methods 0.000 claims description 18
- 238000004512 die casting Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 4
- 238000012546 transfer Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract 4
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 230000002950 deficient Effects 0.000 description 15
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910000882 Ca alloy Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 206010039509 Scab Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
The present invention relates to a magnesium alloy wheel hub pressure casting device and a method thereof. The device comprises a transfer pump for supplying supplementary power to magnesium alloy molten liquid, a running channel system and a mould casting machine, wherein a transfer pipe of the running channel system is connected with a lower mould. The present invention has the pressure casting method that the qualified magnesium alloy molten liquid obtains supplementary power by the transmission of the transfer pump and is charged into a die cavity at a stable and controllable speed; the magnesium alloy molten liquid is solidified and formed under the action of 0.1 to 1MPa pressure. The present invention has the advantages of reasonable structure, convenient operation and use, stable flow of molten liquid, high quality of pressure castings, low rejection rate, and no defect of heat cracks and shrinkage cracks.
Description
Technical field
The present invention relates to the compression casting field, specifically a kind of pressure casting apparatus and method thereof of producing magnesium alloy hub.
Background technology
We know, the reserves of the human utilizable energy of occurring in nature are limited, along with mankind's activity increasing to energy resource consumption, the human existence of having recognized energy crisis.Therefore, the mankind press for the consumption of reduction to the energy.For this reason, more and more stronger to the light-weighted requirement of automobile, to reduce consumption to the energy.Magnesium alloy will become the light-weighted ideal material of automobile because density is low, reserves enrich, be easy to advantages such as shaping and recyclable utilization again.And magnesium alloy auto hub to be magnesium alloy be applied on the automobile, realize typical case's representative that loss of weight is energy-conservation.
Because physics, the metallurgy characteristic of magnesium alloy are limit, the Perfected process for preparing magnesium alloy member, particularly Mg alloy thin wall spare at present is that compression casting is shaped.In the compression casting process, often occur filling that type is imperfect, defective such as shrinkage cavity, cold shut, hot tearing or draw.A kind of improved magnesium alloy member pressure casting method and metal mould device have been proposed among the Chinese patent CN1276276, metal mould device is to be applicable to the die casting of magnesium alloy or metal injection molded metal mould device, it is, if several cast gates, from down gate to each cast gate direct runner is set, and with the non-gate portions distance between adjacent gate, go up the unallowed situation except that the goods design, be made as below the 10mm.The pressure casting method of this metal mould device, effective for casting thin-wall, particularly for following casting thin-wall of 1.5mm or siliceous, rare earth element, the alloy casting of calcium effectively, particularly to following casting thin-wall of this 1.5mm or siliceous, rare earth element, the alloy of calcium is cast with that usefulness is enough stably to obtain not having casting lap, face crack with high-quality, fill bad, the die cast product of metal pattern scab.Said method can improve casting quality to a great extent, improves product percent of pass, but still is difficult to percent defective is controlled at reduced levels.Especially for picture this class of wheel hub heavy castings very high to performance requirement, former cast moulding method is difficult to satisfy the double requirements of performance and production cost especially.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned the deficiencies in the prior art, start with from the key that magnesium alloy pressure-casting is shaped, provide that a kind of structure is reasonable, easy for operation, liquation flows steadily, compression casting part quality height, percent defective are low, the magnesium alloy hub pressure casting apparatus and the method thereof of no hot tearing, draw defective.
The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of magnesium alloy hub pressure casting apparatus, it is characterized in that: be included as the magnesium alloy liquation infusion pump, runner system, mould, the die casting machine that fills type power is provided, the woven hose of runner system links to each other with counterdie.
The compression casting method of a kind of magnesium alloy hub of the present invention is characterized in that: qualified magnesium alloy liquation is driven acquisition by infusion pump fill type power, and charge into mold cavity with the speed of stable and controllable, solidification forming under the effect of 0.1～1MPa pressure.
The present invention is owing to adopt above-mentioned pressure casting apparatus and method, and against existing technologies, its device construction is reasonable, easy for operation, liquation flows steadily, and compression casting part quality height, percent defective are low, no hot tearing, draw defective.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
1. die casting machine movable pressing boards among the figure, 2. patrix, 3. side form, 4. counterdie, 5. mold platform, 6. woven hose, 7. holding furnace, 8. infusion pump, 9. woven hose, 10. smelting furnace, 11. infusion pumps.
The specific embodiment
As can be seen from Figure 1, the invention provides a kind of device that adopts the magnesium alloy liquation by compression casting production magnesium alloy hub, be included as the magnesium alloy liquation infusion pump, runner system and mould, the die casting machine that fills type power is provided.Magnesium alloy is injected in the holding furnace 7 after the heating melting.Holding furnace 7 should have corresponding anti-oxidation measure, seals such as container, even also is furnished with vacuum acquiring system and inert gas aerating device; Holding furnace 7 can not seal yet, and in this case, need cover one deck protective agent at Mg alloy surface, in case oxidation and burning.Magnesium alloy liquation in the holding furnace 7 is transported in the woven hose 6 by infusion pump 8, enters in patrix 2, side form 3 and the counterdie 4 formed die cavities again.Woven hose 6 links to each other with counterdie 4.The structure of mold cavity at first depends on the shape of part, will consider also that on this basis the magnesium alloy flow behavior structurally does some optimization processes.The flow of infusion pump 8 and adjustable in pressure, in the present invention, infusion pump 8 offers the pressure of magnesium alloy liquation 0.05～1MPa.The process structure of die cavity is vital for the quality that improves magnesium alloy member, and this just requires to design rational cavity structure; On the other hand, the flow performance of magnesium alloy liquation in mold cavity is subjected to the influence of technological parameter, and be also most important for the quality of magnesium alloy member.Magnesium alloy flowing in mold cavity is steady as far as possible, reduces its turbulence level to greatest extent, with anti-roll gas, fill defectives such as type deficiency, shrinkage cavity, hot tearing or draw, cold shut and produce.The present invention allows magnesium alloy fill type with suitable pressure and speed for fear of above-mentioned defective, guarantees to generate high-quality die casting.Magnesium alloy is in cavity filling process, if speed is too fast, pressure is too big, occurs defectives such as volume gas easily.According to technology provided by the invention, it is preferable that magnesium alloy fills the type effect with the pressure of 0.05～1MPa.Fill type and finish, magnesium alloy begins solidification shrinkage, and boundary member solidifies earlier, so and mould separating, heat transfer is affected, and causes the tissue odds of part different parts even, thereby causes defective and reduction part anti-fatigue performances such as hot tearing, draw easily.The present invention continues to exert pressure after the magnesium alloy liquation is full of die cavity in order to eliminate this phenomenon, and its pressure limit is 0.1～1Mpa.Magnesium alloy sheds pressure after solidifying fully, helps guaranteeing the homogenising of part each several part tissue like this, avoids defectives such as hot tearing, draw.
In the invention process, need carry out preheating to mould.Mold preheating temperature is if be lower than 120 ℃, occurs cold shut easily and fills defectives such as type is discontented; Mold preheating temperature is if be higher than 480 ℃, the preheating device complexity, break down easily, defectives such as thick appear organizing in foundry goods easily.In the present invention, the preheat temperature scope of mould remain on 120～480 ℃ more satisfactory.
In order to realize the smooth demoulding, die casting front mold inner surface spraying releasing agent is necessary, and releasing agent can adopt materials such as waterglass, silica gel, talcum powder, zinc oxide, magnesia.
In implementation process of the present invention, the air pressure in the die cavity can be identical with atmospheric pressure, and promptly the mold cavity internal pressure is 1 atmospheric pressure before die casting.But for the die casting that occurs defective easily, preferably the air pressure in the die cavity is become negative pressure,, can further reduce defective like this, improve the quality and the qualification rate of die casting promptly less than an atmospheric pressure.The method that obtains negative pressure is to adopt known vacuum acquisition technology, will add a valve in this case on woven hose, to prevent magnesium alloy liquation in the process that obtains negative pressure because pressure differential enters in the mold cavity prematurely.
Pure magnesium ingot, Al, Zn and raw materials such as the intermediate alloy heating that contains elements such as Mn, RE are smelted into insulation in holding furnace 7 behind the qualified liquation.With mould and die preheating to 280 ℃ and with its inner surface spraying one deck releasing agent, start infusion pump 8, under the pressure effect of 0.05～1MPa, make liquation fill type with steady controlled speed, strengthen infusion pump power and make it to provide the pressure of 0.1～1MPa to put on the liquation after die cavity is full of, the magnesium alloy in die cavity is finished and is solidified.
Embodiment 2
With pure magnesium ingot, Al, Zn and contain Mn, in smelting furnace 10, carry out melting behind the feed proportionings such as intermediate alloy of elements such as RE, by infusion pump 11 liquation is transferred in the holding furnace 7 then, with mould and die preheating to 260 ℃ and with its inner surface spraying one deck releasing agent, by vavuum pump the mold cavity internal pressure is reduced to 0.05MPa, open the valve on the woven hose 6, start infusion pump 8, the magnesium alloy liquation is injected mold cavity with the pressure of 0.05～1MPa and steadily controlled speed, the output pressure that improves infusion pump after the magnesium alloy liquation is full of die cavity is frozen into part to 0.8MPa until the magnesium alloy liquation.
Claims (2)
1. magnesium alloy hub pressure casting apparatus, it is characterized in that: be included as the magnesium alloy liquation infusion pump, runner system, mould, die casting machine, the holding furnace that fills type power is provided, magnesium alloy liquation in the holding furnace is transported in the woven hose by infusion pump, enter again in the formed die cavity of patrix, side form and counterdie, the woven hose of runner system links to each other with counterdie, is provided with a valve in the woven hose.
2. magnesium alloy hub pressure casting method, it is characterized in that: qualified magnesium alloy liquation is driven by infusion pump obtain to fill type power, and charge into mold cavity with the speed of stable and controllable, with mould and die preheating to 260 ℃ and with its inner surface spraying one deck releasing agent, by vavuum pump the mold cavity internal pressure is reduced to 0.05MPa, open the valve on the woven hose, start infusion pump, the magnesium alloy liquation is injected mold cavity with the pressure of 0.05～1MPa and steadily controlled speed, the output pressure that improves infusion pump after the magnesium alloy liquation is full of die cavity is frozen into part to 0.8MPa until the magnesium alloy liquation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021358850A CN1323783C (en) | 2002-12-16 | 2002-12-16 | Magnesium alloy hub pressure casting apparatus and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021358850A CN1323783C (en) | 2002-12-16 | 2002-12-16 | Magnesium alloy hub pressure casting apparatus and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1507970A CN1507970A (en) | 2004-06-30 |
| CN1323783C true CN1323783C (en) | 2007-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021358850A Expired - Fee Related CN1323783C (en) | 2002-12-16 | 2002-12-16 | Magnesium alloy hub pressure casting apparatus and method thereof |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934363B (en) * | 2010-09-02 | 2012-11-21 | 许小忠 | Lower-pressure casting type high-pressure solidification molding system by using magnesium alloy hub electromagnetic pump |
| CN103212687A (en) * | 2012-01-19 | 2013-07-24 | 香港生产力促进局 | Casting device and casting method for roulette workpieces |
| CN102527994A (en) * | 2012-03-07 | 2012-07-04 | 威海万丰镁业科技发展有限公司 | Low-pressure casting device |
| CN105268939B (en) * | 2015-10-26 | 2017-08-29 | 贵州裕高电子有限责任公司 | A kind of electrolytic etching of metal fine aluminium negative electrode conducting beam extrusion process |
| CN106513629A (en) * | 2016-11-10 | 2017-03-22 | 无锡市明盛强力风机有限公司 | Improved AZ31 magnesium alloy hub extrusion casting technology |
| CN106735079A (en) * | 2016-12-26 | 2017-05-31 | 安庆迪力机械铸造有限公司 | A kind of forklift hub extrusion casint device |
| CN108405827B (en) * | 2018-04-08 | 2019-11-01 | 仝仲盛 | The preparation process of automobile magnesium alloy hub |
| CN111496225B (en) * | 2020-05-22 | 2021-10-15 | 山西电机制造有限公司 | Low-pressure cast aluminum pressurizing process for cast aluminum rotor of three-phase asynchronous high-voltage motor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08215830A (en) * | 1995-02-13 | 1996-08-27 | Mitsui Mining & Smelting Co Ltd | Melting / casting method of magnesium alloy |
| CN2476374Y (en) * | 2001-04-05 | 2002-02-13 | 北京北方恒利科技发展有限公司 | Electromagnetic pump mold-filling type magnesium alloy low pressure casting system |
-
2002
- 2002-12-16 CN CNB021358850A patent/CN1323783C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08215830A (en) * | 1995-02-13 | 1996-08-27 | Mitsui Mining & Smelting Co Ltd | Melting / casting method of magnesium alloy |
| CN2476374Y (en) * | 2001-04-05 | 2002-02-13 | 北京北方恒利科技发展有限公司 | Electromagnetic pump mold-filling type magnesium alloy low pressure casting system |
Non-Patent Citations (5)
| Title |
|---|
| 电磁泵低压铸造技术 侯击波等，铸造，第51卷第11期 2002 * |
| 电磁泵低压铸造技术 侯击波等，铸造，第51卷第11期 2002;铝合金汽车轮毂的生产方法 王昕，轻合金加工技术，第9卷第4期 2001;镁合金压铸及其在汽车工业中的应用 陈力禾等，铸造，第10期 1999;镁合金制造成形技术的发展 吕宜振等，铸造，第49卷第7期 2001 * |
| 铝合金汽车轮毂的生产方法 王昕，轻合金加工技术，第9卷第4期 2001 * |
| 镁合金制造成形技术的发展 吕宜振等，铸造，第49卷第7期 2001 * |
| 镁合金压铸及其在汽车工业中的应用 陈力禾等，铸造，第10期 1999 * |
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| Publication number | Publication date |
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| CN1507970A (en) | 2004-06-30 |
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