CN106270441A - The atresia pine defect casting forming method of heavy wall die casting - Google Patents
The atresia pine defect casting forming method of heavy wall die casting Download PDFInfo
- Publication number
- CN106270441A CN106270441A CN201610830137.9A CN201610830137A CN106270441A CN 106270441 A CN106270441 A CN 106270441A CN 201610830137 A CN201610830137 A CN 201610830137A CN 106270441 A CN106270441 A CN 106270441A
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- Prior art keywords
- die casting
- casting
- heavy wall
- injection
- pressure
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2069—Exerting after-pressure on the moulding material
Abstract
The invention discloses the casting forming method without shrinkage porosity defect of contraction cavity of a kind of heavy wall die casting.The method can effectively solve the problem that the defect problems such as shrinkage cavity shrinkage porosity, the pore that thick-wall aluminum alloy die casting the most easily occurs.The main contents of invention are: use specific Prepared by Low Superheat Pouring, and the big degree of filling cast of pressure chamber degree of filling 60%～70%, high pressure fills type extrusion process, it is achieved the interior solid zero defect of die casting；Design of Dies increases partial Pressure structure, it is achieved away from the pressurization feeding at the heavy wall of ingate position.Use the present invention that heavy wall die casting can be made to reduce casting flaw, reduce product percent defective, it is to avoid the waste of material, cost-effective increase benefit.
Description
Technical field
The invention belongs to metallic element and manufacture processing technique field, relate to being cast into without shrinkage porosity defect of contraction cavity of die casting
Shape method, is particularly suited for the die casting that aluminium alloy wall thickness is bigger.
Technical background
Aluminium alloy is common lightweight metal material, is widely used in automobile, boats and ships, and electronics and space flight and aviation etc. are led
Territory.Along with lightweight and the needs of functionalization, the demand of aluminum alloy part constantly increases.Shape at all of aluminum alloy part
In technique, die casting is that speed of production is the fastest, a kind of casting method that drip molding quality is higher.It is by liquid that aluminium alloy compression casting shapes
The die cavity of aluminium alloy or semi liquid state aluminium alloy under high pressure Fast Filling metal mold, under high pressure rapid solidification and obtain foundry goods
Method.
Tradition die casting wall thickness the least and uniform, general wall thickness 3～about 4mm, usual dense internal organization, no
It is easily generated defect.But, along with the development of auto industry etc., the structure member design with relatively thick gets more and more, to die casting
Technology proposes new challenge.So-called heavy wall die casting refers to that average wall thickness is more complicated compared with big (>=8mm) and design of part
Die casting.For this type of heavy wall, complicated die casting, the part rate of cooling come in contact due to liquid metal and die surface is fast
Inside liquid metals, and the cooling rate of thick general goal is compared at its thin-walled slow, it is impossible to pressure chamber pressure transmission is come and maintained arrive
The solidification of foundry goods ends, and solidification easily forms shrinkage cavity or shrinkage defect in thick wall area after terminating.Additionally, common metal liquid is watering
During note, the degree of superheat is relatively big, has serious volume gas and oxidative phenomena in cavity filling process, the bleb obtained and be mingled with more.By
In these Shrinkage cavity, pore and the existence being mingled with, cause the mechanical properties decrease of foundry goods, the most often reach not
Require to technology and scrap, cause the waste of material and the energy.
Patent documentation CN103302264A discloses the high-compactness of a kind of aluminium alloy automobile water brake pump case foundry goods
Casting forming method, the method repeatedly carries out skimming degasification and adding coverture in fusion-casting process, controls relatively low aluminum liquid and contain
Tolerance, makes casting solidification posterior spiracle rate relatively low.But for the foundry goods that wall thickness is bigger and complex-shaped, only by carrying out before cast
Degasification measure, not can effectively solve the problem that shrinkage porosite and gas hole defect problem, because thick general goal cooling is relatively slow, if can not get pressurization
Feeding, inevitably forms shrinkage cavity shrinkage porosity.Patent documentation CN105081261A discloses a kind of aluminium alloy castings pressure casting method,
The method quickly filling type, die cavity fills when type rate reaches more than 92% and carries out deceleration injection, it is to avoid fill at a high speed volume gas during type, permissible
Reduce the generation of casting fin, reduce the internal porosity during product shaping.Patent documentation CN101905305A discloses one
Kind of Al-alloy casing die casting high-compactness method of squeeze forming, this method mold cavity near the position of ingate with away from interior
Increase manufacturability bridge structure between the position of cast gate, guide the flow direction of molten metal, make aluminum liquid Fast Filling distal site, and
Carry out pressure to transmit rapidly, reach to reduce pore and the effect of shrinkage cavity generation.But, for aluminum alloy thick wall part, at die carter
In skill, also there is no concrete optimization method.
Although in actual production, being allowed to meet use by impregnation technology process foundry goods for defective foundry goods and want
Ask, but for this heavy section casting, infiltration cannot effectively compensate for the shrinkage cavity shrinkage porosity tissue of inside, therefore, in Die Casting process
Middle innovative technology is the most necessary.
Summary of the invention
The present invention purpose be to provide the manufacturing process without shrinkage porosity defect of contraction cavity of the bigger aluminium alloy castings of a kind of wall thickness,
The method can improve the consistency of foundry goods, eliminates casting flaw.
The atresia pine defect casting forming method of a kind of heavy wall die casting that the present invention provides, it is characterised in that the method
Comprise the steps:
First aluminium alloy carried out melting, degasification and skim, then aluminum liquid being carried out Prepared by Low Superheat Pouring；
Then three grades of injections are carried out: first carrying out injection at a slow speed, injection speed is 0.3～0.5m/s, when injection punch head
When stroke is 100～200mm, carries out quick injection and fill type, now injection plunger 3～8m/s, then carry out supercharging feeding,
Pressure is 70～90MPa；
While three grades of injections, heavy wall position being carried out pressurized, pressure is 10～50MPa, and pressing time is 0.8
～2s, make feeding effect increase, reach to eliminate the effect that Shrinkage cavity produces, obtain required aluminum alloy die casting；
Described pressurized is by increasing pressurized structure at mold cavity away from ingate and wall thickness larger part, watering
Note is extruded by polishing head, to realize pressurization feeding when heavy wall position solidifies the most completely after filling type；Described local
The volume V that the volume i.e. liquid metal of the compression chamber that pressure structure is formed is compressedLFor thick wall part volume Vmax5%～
10%, the area of described polishing head is the 15%～25% of the heavy wall area being perpendicular to compression aspect.
As the improvement of technique scheme, described Prepared by Low Superheat Pouring is that the temperature that aluminum liquid pours into compression chamber of die casting machine is determined
For more than aluminum alloy melt liquidus temperature 20～40 DEG C, the degree of filling 60%～70% of pressure chamber during cast；Mold preheating temperature is 200
～250 DEG C.
Shrinkage cavity, the gas that the bigger die casting of aluminium alloy wall thickness the most easily occurs can be solved by foregoing invention content
The defect problems such as hole, thus improve consistency and the performance of foundry goods.The present invention strictly controls melt temperature before cast, uses low
The degree of superheat is poured into a mould, and on the one hand can guarantee that enough viscosity and mobility, on the other hand high warm rolling gas can be avoided serious；In technique
Upper increase pressurized structure, carries out pressurized heavy wall is the most partially solidified when, so that cast-internal dense structure,
Zero defect, the performance such as intensity gets a promotion.Specifically, the present invention has a techniques below feature:
1. specific Prepared by Low Superheat Pouring, high pressure fill type technique, it is achieved the densification of die casting
(1) temperature that the present invention uses aluminum liquid Prepared by Low Superheat Pouring, i.e. aluminum liquid to pour into compression chamber of die casting machine is aluminium alloy liquid phase
More than line temperature 20～40 DEG C, lower than traditional die casting pouring temperature 30～50 DEG C, require just to have poured into pressure chamber degree of filling simultaneously
60%～70%, mold preheating temperature 200～250 DEG C.Owing to the pouring temperature of aluminum liquid reduces, volume gas is few, and liquid contraction reduces,
Casting compactness improves.
(2) using high pressure to fill three grades of injection techniques of type, high pressure fills type can strengthen the feeding of heavy parts, and permissible
Solve the problem that Prepared by Low Superheat Pouring mobility reduces.
2. realize away from the pressurization feeding at ingate position and heavy wall
Add local pressurizing device in thick wall area, i.e. after die cavity is full of, carry out applying sufficiently large pressure herein
Quickly feeding, pressure size is 10～50MPa, makes feeding effect increase, and reaches to eliminate the effect that Shrinkage cavity produces.
Accompanying drawing explanation
Fig. 1 is the example flow chart of pressurized casting forming method；
Fig. 2 is that heavy wall die casting is with running gate system and the schematic diagram of local pressure structure.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further.At this it should be noted that for
The explanation of these embodiments is adapted to assist in and understands the present invention, but is not intended that limitation of the invention.Additionally, it is disclosed below
As long as each embodiment of the present invention in involved technical characteristic do not constitute conflict each other and just can be mutually combined.
The specific experiment step of the inventive method is as follows:
1, aluminium alloy carries out melting, degasification, skims, then aluminum liquid carry out Prepared by Low Superheat Pouring, i.e. aluminum liquid pours into pressure
The temperature of casting pressure chamber is more than aluminum alloy melt liquidus temperature 20～40 DEG C, lower than traditional die casting pouring temperature 30～50 DEG C, with
Shi Yaoqiu has just poured into pressure chamber degree of filling 60%～70%, mold preheating temperature 200～250 DEG C.Owing to the pouring temperature of aluminum liquid drops
Low, volume gas is few, and liquid contraction reduces, and casting compactness improves.
2, three grades of injection techniques of heavy wall die casting employing:
As it is shown in figure 1, locked mode is to be cast after mould preheating, spraying.Alloy molten solution is poured into pressure chamber, presses the most at a slow speed
Penetrating (one-level injection), speed is 0.3～0.5m/s；When the stroke of injection punch head is 100～200mm, carry out two grades of injections, soon
Ram compression is penetrated and is filled type, now injection plunger 3～8m/s；Then carry out supercharging feeding (three grades of injections), pressure be 70～
90MPa.Die sinking after pressurize certain time, takes out foundry goods.
3, add local pressurizing device in thick wall area, while three grades of injections, carry out pressurized, make feeding effect
Increase, reach to eliminate the effect that Shrinkage cavity produces.
Due to wall thickness >=8mm general at heavy wall, compare more than the twice of general die casting thickness, if according to normal die casting
Fill type, shrinkage cavity shrinkage porosity, the serious performance reducing foundry goods after final set, can be formed in these regions.The inventive method is at these
Thick wall area adds pressurized feeding structure, as in figure 2 it is shown, type is filled in the injection punch head C injection working as injection chamber, die cavity is full of
After, at B, the wall thickness regions phase after solidification can not get feeding.To arranging feeding pressure head A and there is volume V hereinLPressure chamber, solidifying
Solid intermediary and later stages, utilize die casting machine hydraulic power promote feeding drift A, apply sufficiently large pressure and carry out quick feeding, greatly
Little is 10～50MPa, and pressure makes feeding distance strengthen, and movable press head makes feeding amount strengthen, and reaches to eliminate what Shrinkage cavity produced
Effect.
Embodiment:
Embodiment 1
A kind of aluminum alloy thick wall part zero defect casting forming method, heavy wall die casting as shown in Figure 2, thickest up to
15mm, die-cast aluminum alloy material is YL112.Alloy block is put into resistance furnace and carries out 200 DEG C of insulation 20min, remove surface contaminants,
It is warmed up to 750 DEG C again melt, carries out degasification, refine after fusing, skim, be cooled to 640 DEG C subsequently (for aluminum alloy melt phase line
More than temperature 20 DEG C) pour into a mould, mold preheating temperature 250 DEG C, the degree of filling pouring pressure chamber is 65%, and slow shot speed is
0.5m/s, when the stroke of injection punch head is 150mm, carries out fast shot and fills type, and injection speed is 5m/s, when stroke is 250mm,
Carrying out supercharging feeding, pressure is 90MPa, carries out pressurized at heavy wall simultaneously, and pressure by A in Fig. 2, (rush by pressurized
Head) it is delivered to type wall, size is 40MPa, and partial Pressure building volume is the 5% of heavy wall volume, and pressing time is 2s.Above-mentioned pressure
Casting process, improves the performance of heavy section casting B, eliminates the generation of shrinkage cavity shrinkage porosity.
Embodiment 2
Part is uneven wall thickness part, and thickest, up to 12mm, increases local supercharging device, concrete die casting at wall thickness
Flow process is as shown in Figure 1.Die-cast aluminum alloy material is YL112, and die-castingmold filling process is as follows: after matched moulds, is that 650 DEG C of aluminum close by temperature
Gold liquid injects in mold cavity, mold preheating temperature 200 DEG C, and after die cavity fullness rate reaches 60%, slow shot speed is 0.3m/s,
When injection punch head stroke is 200mm, carrying out fast shot and fill type, injection filling velocity is 3m/s；Supercharging feeding staged pressure is
80MPa, carries out pressurized at heavy wall simultaneously, and pressure is delivered to type wall by pressurized drift, and size is 40MPa, office
Pumping chamber of portion volume is the 10% of heavy wall volume, and pressing time is 1.5s.Said method optimizes extrusion process, eliminates shrinkage cavity
The generation of shrinkage porosite.
Embodiment 3
Part is large area heavy section casting, and thickest is up to 18mm, and die-cast aluminum alloy material is A380, die-castingmold filling process
As follows: mould is preheating to 250 DEG C, after matched moulds, it is that 660 DEG C of (more than liquidus curve 40 DEG C) aluminum alloy melts inject mould type by temperature
Intracavity, the degree of filling pouring pressure chamber is 70%, and slow shot speed is 0.5m/s, when the stroke of injection punch head is 200mm, carries out
Fast shot fills type, and injection speed is 8m/s, when stroke is 300mm, carries out supercharging feeding, and pressure is 70MPa, simultaneously at heavy wall
Place carries out pressurized, and pressure is delivered to type wall by pressurized bar, and size is 40MPa, and partial Pressure building volume is heavy wall
The 8% of volume, pressing time is 2s.Said method optimizes extrusion process, eliminates the generation of shrinkage cavity shrinkage porosity.
The above is presently preferred embodiments of the present invention, but the present invention should not be limited to this embodiment and accompanying drawing institute
Disclosure.So every without departing from the equivalence completed under spirit disclosed in this invention or amendment, both fall within the present invention and protect
The scope protected.
Claims (2)
1. the atresia pine defect casting forming method of a heavy wall die casting, it is characterised in that the method comprises the steps:
First aluminium alloy carried out melting, degasification and skim, then aluminum liquid being carried out Prepared by Low Superheat Pouring；
Then carrying out three grades of injections: first carry out injection at a slow speed, injection speed is 0.3～0.5m/s, when the stroke of injection punch head
When being 100～200mm, carry out quick injection and fill type, now injection plunger 3～8m/s, then carry out supercharging feeding, pressure
It is 70～90MPa；
While three grades of injections, heavy wall position being carried out pressurized, pressure is 10～50MPa, and pressing time is 0.8～2s,
Make feeding effect increase, reach to eliminate the effect that Shrinkage cavity produces, obtain required aluminum alloy die casting；
Described pressurized is that cast is filled by increasing pressurized structure at mold cavity away from ingate and wall thickness larger part
Extruded by polishing head after type, to realize pressurization feeding when heavy wall position solidifies the most completely；Described pressurized
The volume V that the volume i.e. liquid metal of the compression chamber that structure is formed is compressedLFor thick wall part volume Vmax5%～10%, institute
State area is the heavy wall area being perpendicular to compression aspect the 15%～25% of polishing head.
Atresia pine defect casting forming method the most according to claim 1, it is characterised in that described Prepared by Low Superheat Pouring is
The temperature that aluminum liquid pours into compression chamber of die casting machine is set to more than aluminum alloy melt liquidus temperature 20～40 DEG C, the degree of filling of pressure chamber during cast
60%～70%；Mold preheating temperature is 200～250 DEG C.
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| CN201610830137.9A CN106270441A (en) | 2016-09-18 | 2016-09-18 | The atresia pine defect casting forming method of heavy wall die casting |
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| CN201610830137.9A CN106270441A (en) | 2016-09-18 | 2016-09-18 | The atresia pine defect casting forming method of heavy wall die casting |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109047703A (en) * | 2018-11-02 | 2018-12-21 | 文春领 | Middle pressure antigravity casting technique |
| CN109732052A (en) * | 2018-12-14 | 2019-05-10 | 珠海市润星泰电器有限公司 | A kind of pressure casting method filtering cavity |
| CN109877277A (en) * | 2019-03-21 | 2019-06-14 | 重庆大学 | A method of casting thick-walled casting |
| CN111390134A (en) * | 2020-04-28 | 2020-07-10 | 华中科技大学 | High-performance die casting forming method based on two-plate die casting machine and product |
| CN112792312A (en) * | 2020-12-25 | 2021-05-14 | 重庆百吉四兴压铸有限公司 | High-pressure casting method by using speed-cut pressure injection |
| CN114888259A (en) * | 2022-04-15 | 2022-08-12 | 哈尔滨吉星机械工程有限公司 | Near-net forming device and method for extrusion casting motorcycle yoke plate below liquid phase line |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030006020A1 (en) * | 1998-07-24 | 2003-01-09 | Richard Kevin L. | Semi-solid casting apparatus and method |
| CN1994622A (en) * | 2006-11-24 | 2007-07-11 | 清华大学 | Slurrying-forming separated aluminium alloy rheological forming method |
| CN101905305A (en) * | 2010-08-25 | 2010-12-08 | 华中科技大学 | High-density die-casting forming method for aluminum alloy casing die castings |
| CN102784898A (en) * | 2012-08-31 | 2012-11-21 | 哈尔滨理工大学 | Local pressurization mechanism and method for producing automobile engine suspension shock insulators by same |
| CN105689682A (en) * | 2016-04-06 | 2016-06-22 | 浙江工业大学 | Oblique drawing core hole local extrusion die-casting die structure and molding process |
-
2016
- 2016-09-18 CN CN201610830137.9A patent/CN106270441A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030006020A1 (en) * | 1998-07-24 | 2003-01-09 | Richard Kevin L. | Semi-solid casting apparatus and method |
| CN1994622A (en) * | 2006-11-24 | 2007-07-11 | 清华大学 | Slurrying-forming separated aluminium alloy rheological forming method |
| CN101905305A (en) * | 2010-08-25 | 2010-12-08 | 华中科技大学 | High-density die-casting forming method for aluminum alloy casing die castings |
| CN102784898A (en) * | 2012-08-31 | 2012-11-21 | 哈尔滨理工大学 | Local pressurization mechanism and method for producing automobile engine suspension shock insulators by same |
| CN105689682A (en) * | 2016-04-06 | 2016-06-22 | 浙江工业大学 | Oblique drawing core hole local extrusion die-casting die structure and molding process |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109047703A (en) * | 2018-11-02 | 2018-12-21 | 文春领 | Middle pressure antigravity casting technique |
| CN109732052A (en) * | 2018-12-14 | 2019-05-10 | 珠海市润星泰电器有限公司 | A kind of pressure casting method filtering cavity |
| CN109732052B (en) * | 2018-12-14 | 2020-09-22 | 珠海市润星泰电器有限公司 | Die casting method of filtering cavity |
| US11752548B2 (en) | 2018-12-14 | 2023-09-12 | Zhuhai Runxingtai Electrical Co., Ltd | Die casting method for filtering cavity |
| CN109877277A (en) * | 2019-03-21 | 2019-06-14 | 重庆大学 | A method of casting thick-walled casting |
| CN111390134A (en) * | 2020-04-28 | 2020-07-10 | 华中科技大学 | High-performance die casting forming method based on two-plate die casting machine and product |
| CN111390134B (en) * | 2020-04-28 | 2021-07-02 | 华中科技大学 | High-performance die casting forming method based on two-plate die casting machine and product |
| CN112792312A (en) * | 2020-12-25 | 2021-05-14 | 重庆百吉四兴压铸有限公司 | High-pressure casting method by using speed-cut pressure injection |
| CN112792312B (en) * | 2020-12-25 | 2022-02-11 | 重庆百吉四兴压铸有限公司 | High-pressure casting method by using speed-cut pressure injection |
| CN114888259A (en) * | 2022-04-15 | 2022-08-12 | 哈尔滨吉星机械工程有限公司 | Near-net forming device and method for extrusion casting motorcycle yoke plate below liquid phase line |
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Application publication date: 20170104 |