CN105057637A - Method and device for casting of aluminum alloy wheels - Google Patents
Method and device for casting of aluminum alloy wheels Download PDFInfo
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- CN105057637A CN105057637A CN201510526786.5A CN201510526786A CN105057637A CN 105057637 A CN105057637 A CN 105057637A CN 201510526786 A CN201510526786 A CN 201510526786A CN 105057637 A CN105057637 A CN 105057637A
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Abstract
The invention discloses a method and device for casting of aluminum alloy wheels. The method and device are specially used for cast forming of the aluminum alloy wheels and capable of boost reforming of existing low-pressure casting machines. The device and method are characterized in that (1) according to an isostatic-pressure injection feeding principle, a feeding cavity which is communicated with a die cavity and provided with a round section is formed, and molten aluminum in the feeding cavity is injected into the die cavity in real time through a feeding device during progressive solidification of castings; (2) the feeding cavity is located under a center hole of a die, the upper end of the feeding cavity is communicated with the die cavity, and the lower end of the feeding cavity is communicated with a riser tube in a oblique crossing mode; (3) a feeding injection piston is arranged in the feeding cavity and in clearance fit with the feeding cavity, plugging is completed under the effect of a feeding oil cylinder, and the molten aluminum in the feeding cavity is injected into the die cavity in time. The device and method have the beneficial effects that (1), feeding pressure is improved, the phenomena of air holes and shrinkage porosity are reduced, and high-density wheel castings are obtained; (2), the air pressure of a holding furnace is reduced by half, and therefore the service life of the holding furnace is prolonged.
Description
Technical field
The invention belongs to casting forming process and equipment field, particularly aluminum-alloy wheel casting forming process and equipment.
Background technology
adoptcasting technique is produced aluminum-alloy wheel and is had the advantages such as strong adaptability, designs and varieties are various, production cost is low, is the most common method of producing aluminum-alloy wheel both at home and abroad at present.Casting technique comprises gravitational casting, low pressure casting and counter-pressure casting etc., and the formability of low pressure casting is good, clear-cut, even density, any surface finish, and yield rate, more than ninety percent, is the main flow manufacture method of aluminum-alloy wheel.But due to the restriction of the factors such as physical device condition and technical conditions, low pressure casting wheel is the defect such as shrinkage porosite, shrinkage cavity that produces because feeding power is not enough of ubiquity still, the method of existing solution shrinkage cavity and porosity defect is the improvement to mould structure and technological parameter, but does not all obtain obvious effect.People attempt to increase the gas pressure of low pressure casting machine holding furnace, reach the object of powerful feeding, but due to the materials and structures of holding furnace, can not bear stronger air pressure, the method directly increasing air pressure is ended without result.
This patent gas low pressure is filled type and boosting Feeding combines, holding furnace applies low-pressure gas only for filling type, feeding pressure is not close to holding furnace liquid level applying gas pressure and realizes, but realize by the feeding device taking hydraulic cylinder as power, compared with the low-pressure casting process widely applied, both improve feeding pressure, again reduced the gas pressure of holding furnace, there is obvious technical advantage.
Summary of the invention
The present invention discloses a kind of casting method and device of aluminum-alloy wheel, what be specifically designed to aluminum-alloy wheel casting fills in type and process of setting feeding of boosting, it is characterized in that: 1) inject feeding principle according to isostatic pressed, by setting up a cross section be connected with mold cavity to be circular feeding cavity volume (1-1), adopt hydraulic cylinder (1-4) that the aluminium liquid in feeding cavity volume (1-1) is carried out feeding along with the consecutive solidification of foundry goods is injected in mold cavity in real time; 2) foundry technology process is: apply low-pressure gas in holding furnace (1-6) and complete aluminium liquid and fill type to the low pressure of mold cavity---hydraulic cylinder (1-4) promotes feeding and injects piston (1-3) shutoff inlet------control sequence is solidified and promoted feeding and injects piston (1-3) and inject the aluminium liquid in feeding cavity volume (1-1) to mold cavity---release that holding furnace (1-6) is decompressed to normal pressure die sinking discharging; 3) device realizing this technical process by feeding cavity volume (1-1), connect holding furnace (1-6) and with the stalk (1-2) of feeding cavity volume (1-1) oblique UNICOM, piston (1-3) is injected in feeding and hydraulic cylinder (1-4) forms.
Feeding cavity volume (1-1) in this patent is located at below the centre bore of mould (1-5), and with the centre bore UNICOM of mould (1-5), below holding furnace (1-6) interior aluminium water liquid level is inserted in stalk (1-2) one end, the other end and feeding cavity volume (1-1) lower end oblique UNICOM, the volume settings of feeding cavity volume (1-1) is the 6-8% of foundry goods volume, it is identical that piston (1-3) material is injected in feeding cavity volume (1-1) and feeding, elect silicon nitride as preferred material, the two fit clearance is 0.12 ~ 0.20mm.
Piston (1-3) is injected in the feeding being provided with matched in clearance in feeding cavity volume (1-1) in this patent, feeding is injected piston (1-3) and is moved upward to more than implementation of port position, realize the shutoff to stalk (1-2) feed liquid, continue to move upward the pressurization feeding realized feed liquid, along with the consecutive solidification of aluminium liquid in mold cavity, in real time the aluminium liquid in feeding cavity volume (1-1) is all injected in mold cavity, feeding cavity volume (1-1) outside is provided with feed liquid and mends warm device (1-7), in bolus infusion processes, benefit temperature is carried out to feed liquid, ensure that the mobility of feed liquid in feeding cavity volume (1-1).
The thrust that piston (1-3) is injected in feeding in this patent realizes by hydraulic cylinder (1-4), injects pressure and changes with process of setting, and injecting pressure limit is 0.5 ~ 8.0bar.
The beneficial effect that this patent brings is: 1) improve feeding pressure, reduces the formation of pore and shrinkage porosite, obtains high-compactness wheel; 2) air pressure of holding furnace reduces half, thus improves the service life of holding furnace; 3) obtain the strand without cast gate, improve stock utilization; 4) this method and device can conveniently for existing air injection machine boosting and transformations.
Accompanying drawing explanation
Fig. 1 is boosting feeding device of the present invention and mould broken away view.
Mainly comprise in Fig. 1: feeding cavity volume (1-1), stalk (1-2), feeding are injected piston (1-3), hydraulic cylinder (1-4), mould (1-5), holding furnace (1-6), mended warm device (1-7).
Detailed description of the invention
(the present embodiment further illustrates of the present invention, instead of to any restriction that the present invention makes) is described in detail with regard to detailed description of the invention below in conjunction with accompanying drawing
1 pair of detailed rules for the implementation is described by reference to the accompanying drawings, to be aly of a size of 16X6.5 inch, aluminum vehicle wheel that material is A356, adopts the process of this method and device fabrication cast aluminum alloy wheel as follows:
(1) first holding furnace (1-6) is shifted out, be satisfied with the side of casting machine, stalk (1-2) is connected with feeding cavity volume (1-1), and feeding cavity volume (1-1) is arranged on the downside of mould (1-5) center, and mould (1-5) is mounted between die casting machine slide block and workbench;
(2) air injection machine work, the feed liquid of holding furnace (1-6) inside flow in mold cavity through stalk (1-2) and feeding cavity volume (1-1), and die cavity is full of by aluminium level quietly;
(3) fill type terminate rear feeding inject piston (1-3) rise, coordinate with feeding cavity volume (1-1), when feeding inject piston (1-3) be moved upward to more than liquid outlet position time, feed liquid path is cut off, holding furnace (1-6) pressure release, aluminium liquid in stalk (1-2) flows backwards and gets back in holding furnace (1-6), and the benefit temperature device (1-7) of feeding cavity volume (1-1) outside carries out benefit temperature to feed liquid in the course of the work at any time, ensure that the mobility of feed liquid in feeding cavity volume (1-1);
(4) feeding inject piston (1-3) continue rise feed liquid is pressurizeed, pressurization feeding is carried out in the order cooling being combined with strand, the cooling order of wheel blank is inner rim → wheel rim → spoke → core wheel, the feeding pressure that equipment provides is 0.5 ~ 8.0bar, along with the carrying out of casting process, feeding inject piston (1-3) progressively by aluminium hydraulic pressure reserved in feeding cavity volume (1-1) in mold cavity, feeding volume accounts for 6 ~ 8% of feed liquid cumulative volume, the strand obtained after cooling is without cast gate, and centre bore position is just shaped, eliminates and follow-uply go cast gate operation;
(5) wheel takes out by manipulator, more finally obtains wheel product through operations such as follow-up heat treatment, machined, application and detections.
Claims (4)
1. the present invention discloses a kind of casting method and device of aluminum-alloy wheel, be specifically designed to aluminum-alloy wheel cast form, it is characterized in that: 1) inject feeding principle according to isostatic pressed, by setting up a cross section be connected with mold cavity to be circular feeding cavity volume (1-1), adopt hydraulic cylinder (1-4) that the aluminium liquid in feeding cavity volume (1-1) is carried out feeding along with the consecutive solidification of foundry goods is injected in mold cavity in real time; 2) foundry technology process is: apply low-pressure gas in holding furnace (1-6) and complete aluminium liquid and fill type to the low pressure of mold cavity---hydraulic cylinder (1-4) promotes feeding and injects piston (1-3) shutoff inlet------control sequence is solidified and promoted feeding and injects piston (1-3) and inject the aluminium liquid in feeding cavity volume (1-1) to mold cavity---release that holding furnace (1-6) is decompressed to normal pressure die sinking discharging; 3) device realizing this technical process by feeding cavity volume (1-1), connect holding furnace (1-6) and with the stalk (1-2) of feeding cavity volume (1-1) oblique UNICOM, piston (1-3) is injected in feeding and hydraulic cylinder (1-4) forms.
2. the casting method of a kind of aluminum-alloy wheel according to claim 1 and device, it is characterized in that: feeding cavity volume (1-1) is located at below the centre bore of mould (1-5), and with the centre bore UNICOM of mould (1-5), below holding furnace (1-6) interior aluminium water liquid level is inserted in stalk (1-2) one end, the other end and feeding cavity volume (1-1) lower end oblique UNICOM, the volume settings of feeding cavity volume (1-1) is the 6-8% of foundry goods volume, it is identical that piston (1-3) material is injected in feeding cavity volume (1-1) and feeding, and the two fit clearance is 0.12 ~ 0.20mm.
3. the casting method of a kind of aluminum-alloy wheel according to claim 1 and device, it is characterized in that: piston (1-3) is injected in the feeding being provided with matched in clearance in feeding cavity volume (1-1), feeding is injected piston (1-3) and is moved upward to more than implementation of port position, realize the shutoff to stalk (1-2) feed liquid, continue to move upward the pressurization feeding realized feed liquid, along with the consecutive solidification of aluminium liquid in mold cavity, in real time the aluminium liquid in feeding cavity volume (1-1) is all injected in mold cavity.
4. the wheel cast method of a kind of aluminium alloy described in claim 1 and 3 and device, it is characterized in that: the thrust that piston (1-3) is injected in feeding realizes by hydraulic cylinder (1-4), inject pressure to change with process of setting, injecting pressure limit is 0.5 ~ 8.0bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510526786.5A CN105057637A (en) | 2015-08-26 | 2015-08-26 | Method and device for casting of aluminum alloy wheels |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510526786.5A CN105057637A (en) | 2015-08-26 | 2015-08-26 | Method and device for casting of aluminum alloy wheels |
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| CN105057637A true CN105057637A (en) | 2015-11-18 |
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| CN201510526786.5A Pending CN105057637A (en) | 2015-08-26 | 2015-08-26 | Method and device for casting of aluminum alloy wheels |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105642866A (en) * | 2016-03-08 | 2016-06-08 | 北京航空航天大学 | Crystallization pressurization method for low-pressure casting molding of aluminum alloy wheel metal mold |
| CN109047703A (en) * | 2018-11-02 | 2018-12-21 | 文春领 | Middle pressure antigravity casting technique |
| CN109954863A (en) * | 2019-03-26 | 2019-07-02 | 沈阳铸造研究所有限公司 | A kind of device and method of short route extrusion casint conveying aluminum liquid |
| CN111673071A (en) * | 2020-06-22 | 2020-09-18 | 北京航空航天大学 | Multi-riser-tube-based rapid sequential solidification forming device and method for wheels |
| CN117862431A (en) * | 2024-03-13 | 2024-04-12 | 北京航空航天大学 | Online vacuum mechanical stirring pressure-regulating extrusion die casting equipment |
-
2015
- 2015-08-26 CN CN201510526786.5A patent/CN105057637A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105642866A (en) * | 2016-03-08 | 2016-06-08 | 北京航空航天大学 | Crystallization pressurization method for low-pressure casting molding of aluminum alloy wheel metal mold |
| CN109047703A (en) * | 2018-11-02 | 2018-12-21 | 文春领 | Middle pressure antigravity casting technique |
| CN109954863A (en) * | 2019-03-26 | 2019-07-02 | 沈阳铸造研究所有限公司 | A kind of device and method of short route extrusion casint conveying aluminum liquid |
| CN111673071A (en) * | 2020-06-22 | 2020-09-18 | 北京航空航天大学 | Multi-riser-tube-based rapid sequential solidification forming device and method for wheels |
| CN111673071B (en) * | 2020-06-22 | 2024-05-31 | 北京航空航天大学 | Device and method for rapid sequential solidification forming of wheels based on multiple lift tubes |
| CN117862431A (en) * | 2024-03-13 | 2024-04-12 | 北京航空航天大学 | Online vacuum mechanical stirring pressure-regulating extrusion die casting equipment |
| CN117862431B (en) * | 2024-03-13 | 2024-05-28 | 北京航空航天大学 | Online vacuum mechanical stirring pressure-regulating extrusion die casting equipment |
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Application publication date: 20151118 |
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