CN104368790A - Metal liquid-state fluctuation high pressure casting and forging once-molding method - Google Patents
Metal liquid-state fluctuation high pressure casting and forging once-molding method Download PDFInfo
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- CN104368790A CN104368790A CN201410632333.6A CN201410632333A CN104368790A CN 104368790 A CN104368790 A CN 104368790A CN 201410632333 A CN201410632333 A CN 201410632333A CN 104368790 A CN104368790 A CN 104368790A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
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Abstract
The invention provides a metal liquid-state fluctuation high pressure casting and forging once-molding method. On a fluctuation high pressure casting and forging once-molding machine, liquid metal is conveyed to a die inlet through a heat preservation liquid transferring device, the liquid metal enters a die cavity through pressure for conducting pressure casting, after 0.01 s to 2 s after the die cavity is filled with the liquid metal, fluctuation high pressure casting and forging on the liquid-state or semi-solid-state metal in the die cavity is completed instantly, and casting and forging once molding is completed; the metal liquid-state fluctuation high pressure casting and forging once-molding method particularly includes the pressure casting step and the fluctuation high pressure forging step, and technological parameters are strictly controlled. By means of the method, pressure casting and fluctuation high pressure forging once molding on the liquid-state or semi-solid-state metal in one production phase are achieved; compared with traditional pressure casting pieces, manufactured parts have the advantages that the number of shrinkage holes is obviously decreased, and the intensity and the ductility are obviously improved. The metal liquid-state fluctuation high pressure casting and forging once-molding method is particularly suitable for producing precision mechanical parts with complex shapes and higher intensity requirements, the manufacturing cost is low, and the production efficiency is not influenced.
Description
Technical field
The invention belongs to metal material liquid condition shaping technical field, specifically the present invention relates to the high die casting of fluctuating of the metal liquid of a kind of metal material from liquid state to high-performance components and forge one-time formed method.
Background technology
Liquid metal pressure is cast because cost is low, efficiency is high, the product of complicated shape can be prepared, and be widely used, but melted metal high pressure, at a high speed under inject mold cavity, easily cause the gas in die cavity to be difficult to get rid of and turbulent flow to cause being formed in foundry goods pore, shrinkage cavity and the precision optical machinery parts yield rate that defect, particularly die casting are complex-shaped, performance requirement is high such as loose low, affect its performance, as automobile structural member.Therefore, domestic and international researcher studies new casting method and former one after another.Current existing forming technique is penetrated casting, evacuated die-casting process and squeeze casting technology as semisolid and is arisen at the historic moment.Semisolid penetrates type casting moulding equipment investment greatly, technology controlling and process difficulty; The system sealing complexity that evacuated die-casting process is shaping, vacuum is difficult to control, and vacuum valve very easily blocks, and cleaning is frequent; Squeeze cast form filling velocity is too slow, affects production efficiency.Based on above reason, above-mentioned forming method is all difficult to realize industrialization.
Published patent document (publication number is CN103834836A) provides a kind of manufacture method of die casting reflectal, employing die casting and once forging, secondary forging and subsequent heat treatment and mechanical treatment technique, prepare a kind of Novel pressure-cast aluminum alloy.Patent document (publication number is CN103418771A) discloses a kind of casting and forging molding method of metalwork, the raw metal cooling of molten condition is made to form metalwork, and then metalwork is forged and pressed and forming processes, possess die cast operation less, and shorter characteristic consuming time.But, its Forging Technology of said method all die casting and shaping after carry out, the defects such as so easy generation is loose, shrinkage cavity and pore, affect the compactness of product.
Based on above problem, patent object of the present invention is to provide a kind of metal liquid to fluctuate high die casting forging one-step moulding method, can realize in same forming process, completing high-pressure casting continuously and forge two kinds of functions with fluctuation high pressure, realize the accurate control to part function, shape and size simultaneously, significantly reduce that product is loose, the defect such as shrinkage cavity and pore, improve the compactness of product.In addition, in metal liquid solidification process, apply the hammering of fluctuation high pressure, smash inner large dendritic crystal, thinning microstructure, the performance of further improving product; Finally the product after shaping can be heat-treated, again promote the mechanical property of foundry goods; Casting and forging molding completes in very short time simultaneously, does not affect production efficiency.
Summary of the invention
The present invention proposes the high die casting of fluctuating of a kind of metal liquid and forge one-time formed method, realize especially by following process program:
High die casting of fluctuating forging one-shaper, its principle is additional wave dynamic high-pressure forging function on the basis of pressure casting machine, and two Long Distances oil cylinders complete matched moulds and rear mold motion; Forging and stamping oil cylinder and little stroke nitrogen cylinder complete liquid state or semisolid die forging; Conveying blank oil cylinder inputs to loading mould cavity liquid metal, completes compression casting and high die casting forging one-shot forming of fluctuating.Adopt the structure of pressurization forging mold to comprise outside the front and back mould similar with die casting, framed, core rod, slide block and runner, also comprise the drift that can forge.Metal liquid fluctuates, and to forge one-time formed technological process be liquid metal injection to mold cavity in high die casting, compression casting and fluctuation high pressure forging one-shot forming.
A kind of metal liquid high die casting forging one-step moulding method concrete technology that fluctuates comprises the steps:
A, compression casting step
On fluctuation high die casting forging one-shaper, after metal dissolves completely at 500-800 DEG C, utilize insulation to turn liquid device and melt is transported to die entrance, with the pressure of 8-40Mpa, melt is input in die cavity by the filling speed of 0.01-10m/s, completes compression casting.The control of above die-casting technological parameter directly affects molten metal liquid and whether can fill up whole mold cavity, and the porosity of metallic article.
B, fluctuation high pressure forging step
Compression casting is full of 0.01-2s after die cavity until melt, the instantaneous fluctuation high pressure forging completed described liquid state or semi-solid-state metal, the forging pressure controlling the forging of described fluctuation high pressure is 5-40Mpa, the temperature of forging mold is 200-400 DEG C, forging times is 1-5 time, and adjacent twice forging time is spaced apart 0.01-1s.
Fluctuation high pressure forging power is hydraulic pressure or baric systerm, or both combinations, and can freely switch at any time, baric systerm opposing hydraulic system Forging Equipment Speed is fast.Controlled forge process pressure is 5-40Mpa, and the speed of forging pressure system and pressure directly affect the heterogeneous microstructure of parts, thus affects the quality of parts.
The temperature of controlled forge process mould is 200-400 DEG C, and mould adopts electrical heating, and mold temperature directly affects the quality of parts and the life-span of mould.
The time that controlled forge process starts is 0.01-2s after liquid metal fills up whole mold cavity, and the forging time started directly affects the solid-liquid ratio in melt, and the forging time started is too short, and also do not form dendrite in melt, hammering does not have action effect; The forging time started is oversize, and in melt, dendrite solidifies completely, and hammering crushing effect is not obvious.
Controlled forge process number of times is 1-5 time, and forging times directly affects quality and the energy consumption of parts, and forging times is few, and the performance of parts does not reach optimum value; Forging times is too much, inoperative to the performance boost of parts, increases energy consumption.
Control adjacent twice forging time and be spaced apart 0.01-5s, twice forging interlude length directly affects the solidification process of liquid metal, thus affects forging effect.
A kind of metal liquid provided by the invention high die casting of fluctuating is forged one-time formed method and is compared with prior art had the following advantages:
One-time formed method is forged in a kind of metal liquid high die casting of fluctuating adopting the present invention to propose, in the same production cycle, liquid towards or semi-solid-state metal carry out compression casting and fluctuation high pressure forging one-shot forming, the parts prepared are compared die casting and are quantitatively obviously reduced in shrinkage cavity, intensity and percentage elongation can effectively improve, be particularly suitable for producing the precision optical machinery parts complex-shaped, requirement of strength is high, low cost of manufacture, and do not affect production efficiency.
Accompanying drawing explanation
Referring to accompanying drawing, embodiments of the present invention is further illustrated, wherein:
Fig. 1 be a kind of metal liquid of the present invention fluctuate high die casting forging one-step moulding method process chart.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The invention provides a kind of metal liquid fluctuate high die casting forging one-step moulding method, on fluctuation high die casting forging one-shaper, adopt pressure compression casting in liquid metal input die cavity and fluctuation high pressure forging one-shot forming, compression casting is adopted to be full of 0.01-2s after die cavity until melt, the instantaneous fluctuation high pressure forging completed described liquid state or semi-solid-state metal.High die casting of fluctuating forging one-shaper manufactures and designs on common die casting machine basis, and most of structure is identical with die casting machine with accessory, only increases forging and stamping oil cylinder and relevant component.
Refer to Fig. 1 be a kind of metal liquid of the present invention fluctuate high die casting forging one-step moulding method process chart, concrete technological parameter and step as follows:
A, compression casting
On fluctuation high die casting forging one-shaper, after metal dissolves completely at 500-800 DEG C, utilize insulation to turn liquid device and melt is transported to die entrance, with the pressure of 8-40Mpa, melt injection in mold cavity, is completed compression casting by the filling speed of 0.01-10m/s.The control of above die-casting technological parameter directly affects molten metal melt and whether can fill up whole mold cavity, and the porosity of final metallic article.
B, fluctuation high pressure forging step
1) the high pressure forging dynamical system that fluctuates pressure
Fluctuation high pressure forging power is hydraulic pressure or baric systerm, and both can freely switch at any time, and baric systerm opposing hydraulic system Forging Equipment Speed is fast.Controlled forge process pressure is 5-40Mpa, and the speed of forging pressure system and pressure directly affect the heterogeneous microstructure of parts, thus affects the quality of parts.
2) temperature of fluctuation high pressure forging mold
The temperature of controlled forge process mould is 200-400 DEG C, and mould adopts electrical heating, and mold temperature directly affects the quality of parts and the life-span of mould.
3) fluctuate the high pressure forging time started
The time that controlled forge process starts is 0.01-2s after liquid metal fills up whole mold cavity, and the forging time started directly affects the solid-liquid ratio in melt.The forging time started is too short, and also do not form dendrite in melt, hammering does not have action effect; The forging time started is oversize, and in melt, dendrite solidifies completely, hammering DeGrain.
4) fluctuate high pressure forging times
Controlled forge process number of times is 1-5 time, and forging times directly affects quality and the energy consumption of parts, and forging times is few, and the performance of parts does not reach optimum value; Forging times is too much, inoperative to the performance boost of parts, increases energy consumption.
5) adjacent twice pressurization forging time interval
Control adjacent twice forging time and be spaced apart 0.01-5s, twice forging interlude length directly affects the solidification process of liquid metal, thus affects forging effect
Described method comprises the module after to the forging of fluctuation high pressure further and heat-treats, and again can promote the mechanical property of described module.
Specific embodiment one: a kind of metal liquid fluctuate high die casting forging one-step moulding method prepare auto parts and components.
Adopt fluctuation high die casting forging one-shaper, its principle is additional fluctuation forging function on the basis of pressure casting machine, and its structure is that two Long Distances oil cylinders complete matched moulds and rear mold motion; Forging and stamping oil cylinder and little stroke nitrogen cylinder complete liquid state or semisolid die forging; Conveying blank oil cylinder: liquid metal is inputed to loading mould cavity.
Adopt the structure of pressurization forging mold to comprise outside the front and back mould similar with die casting, framed, core rod, slide block and runner, also comprise the drift that can forge.
Metal liquid fluctuates, and to prepare the technique of auto parts and components as follows for high die casting forging one-step moulding method:
A, compression casting
Adopt on fluctuation high die casting forging one-shaper, after metal dissolves completely at 690 DEG C, utilize insulation to turn liquid device and melt is transported to die entrance, with the pressure of 8-14Mpa, liquid metal is input in mold cavity by the filling speed of 4m/s, until fill complete, completes compression casting shaping.
B, the forging of fluctuation high pressure
Fluctuation high pressure forging power can select nitrogen pressure system or hydraulic system, and controlled forge process pressure is 14Mpa;
The temperature of controlled forge process mould is 250 DEG C, and mold heated adopts electrically heated mode;
The time that controlled forge process starts is 0.01s after liquid metal fills up whole mold cavity;
Controlled forge process number of times is 3 times;
Control adjacent twice forging time and be spaced apart 1.7s;
The defects such as the auto parts and components prepared by above process significantly decrease that product is loose, shrinkage cavity and pore, product compactness is good, quantitatively has obvious minimizing than traditional die casting in shrinkage cavity, and intensity and percentage elongation improve more than 20%.
The above the specific embodiment of the present invention, does not form limiting the scope of the present invention.Various other that any technical conceive according to the present invention is made change and distortion accordingly, all should be included in the protection domain of the claims in the present invention.
Claims (4)
1. a metal liquid fluctuates high die casting forging one-step moulding method, on fluctuation high die casting forging one-shaper, adopt insulation to turn liquid device and liquid metal is transported to die entrance, adopt pressure compression casting in liquid metal input die cavity again, it is characterized in that, be full of 0.01 ~ 2S after die cavity until liquid metal, the instantaneous fluctuation high pressure forging completed liquid in die cavity or semi-solid-state metal, complete die casting forging one-shot forming, specifically comprise the following steps:
A, compression casting step
On fluctuation high die casting forging one-shaper, insulation is adopted to turn liquid device by delivery of molten metal to die entrance, pressure is adopted to carry out high-pressure casting in liquid metal input die cavity again, controlling described melted metal temperature is 500-800 DEG C, casting pressure is 8-40Mpa, and filling speed is 0.01-10m/s;
B, fluctuation high pressure forging step
Compression casting is full of 0.01 ~ 2S after die cavity until liquid metal, the instantaneous fluctuation high pressure forging completed liquid in die cavity or semi-solid-state metal, the forging pressure controlling the forging of described fluctuation high pressure is 5-40Mpa, the temperature of forging mold is 200-400 DEG C, forging times is 1-5 time, and adjacent twice forging time is spaced apart 0.01-5s.
2. a kind of metal liquid according to claim 1 fluctuate high die casting forging one-step moulding method, it is characterized in that, it is 0.01-2s that described fluctuation high pressure forges the time started, and the described fluctuation high pressure forging time started is pressurize to first time after described compression casting metal bath fills up whole die cavity to forge the time interval between starting.
3. a kind of metal liquid according to claim 1 fluctuate high die casting forging one-step moulding method, it is characterized in that, described fluctuation high pressure be forged to hydraulic system forging, baric systerm forging or both combination.
4. a kind of metal liquid according to claim 1 fluctuate high die casting forging one-step moulding method, it is characterized in that, described method comprise further to fluctuation high pressure forging after foundry goods heat-treat, promote the mechanical property of described foundry goods.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344974A (en) * | 2015-12-15 | 2016-02-24 | 哈尔滨工业大学 | Method for applying fluctuating pressure in low-pressure casting process |
| CN105458629A (en) * | 2015-12-15 | 2016-04-06 | 铜陵铜官府文化创意股份公司 | Copper walnut and production method thereof |
| CN108251715A (en) * | 2018-02-08 | 2018-07-06 | 山东弗泽瑞金属科技有限公司 | Suitable for the aluminum alloy materials of vacuum low speed pressure casting method |
| CN108568505A (en) * | 2018-04-17 | 2018-09-25 | 广东鸿图南通压铸有限公司 | A kind of process improving pack alloy accumulator holder burst pressure |
| CN112399895A (en) * | 2018-07-10 | 2021-02-23 | 贝塔鲁特有限公司 | Method and apparatus for double acting liquid forging |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344974A (en) * | 2015-12-15 | 2016-02-24 | 哈尔滨工业大学 | Method for applying fluctuating pressure in low-pressure casting process |
| CN105458629A (en) * | 2015-12-15 | 2016-04-06 | 铜陵铜官府文化创意股份公司 | Copper walnut and production method thereof |
| CN105458629B (en) * | 2015-12-15 | 2018-06-08 | 铜陵铜官府文化创意股份公司 | Copper walnut and its production method |
| CN108251715A (en) * | 2018-02-08 | 2018-07-06 | 山东弗泽瑞金属科技有限公司 | Suitable for the aluminum alloy materials of vacuum low speed pressure casting method |
| CN108568505A (en) * | 2018-04-17 | 2018-09-25 | 广东鸿图南通压铸有限公司 | A kind of process improving pack alloy accumulator holder burst pressure |
| CN112399895A (en) * | 2018-07-10 | 2021-02-23 | 贝塔鲁特有限公司 | Method and apparatus for double acting liquid forging |
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| CN104368790B (en) | 2018-04-06 |
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Effective date of registration: 20190108 Address after: 516083 Jiarui Industrial Park, Longhai Third Road, Daya Bay West District, Huizhou City, Guangdong Province Patentee after: Richwood Industrial Science and Technology (Huizhou) Co., Ltd. Address before: 518111 Jiarui Science and Technology Industrial Park, Fenghuang Avenue, Pinghu Street, Longgang District, Shenzhen City, Guangdong Province, 1 building A1, A2, B1, B2, C1, C2 Patentee before: Chong Jin Technology (Shenzhen) Co., Ltd. |
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