CN104907530B - Powerful casting technology for aluminum alloy wheels - Google Patents

Powerful casting technology for aluminum alloy wheels Download PDF

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Publication number
CN104907530B
CN104907530B CN201410656120.7A CN201410656120A CN104907530B CN 104907530 B CN104907530 B CN 104907530B CN 201410656120 A CN201410656120 A CN 201410656120A CN 104907530 B CN104907530 B CN 104907530B
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mould
feeding
casting
cooling
compression chamber
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CN104907530A (en
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孙惠学
李建
刘鑫鑫
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QINHUANGDAO YANDA MODERN INTEGRATION MANUFACTURING TECHNOLOGY DEVELOPMENT CO LTD
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QINHUANGDAO YANDA MODERN INTEGRATION MANUFACTURING TECHNOLOGY DEVELOPMENT CO LTD
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Abstract

The invention discloses a powerful casting technology method for aluminum alloy wheels. The powerful casting method aims at solving the problems that in traditional low-pressure casting and gravity casting of the aluminum alloy wheels, the feeding capacity is weak, the strength of castings is low, and the ductility is low. According to the powerful casting method for the aluminum alloy wheels, under the condition that materials are not changed, as the casting method is changed, the application effects of increasing density, strength, the ductility, the material use rate and the production rate are achieved. The powerful casting method for the aluminum alloy wheels is characterized in that conventional cast aluminum is smelted to be within a casting temperature range, casting is completed in an air-entrapment-free flow guide and speed-control mold filling mode, real-time powerful feeding in the solidification process is carried out on molten aluminum sealed in a cavity through a feeding pressurizing mechanism, a mold temperature control measure point and cooling water channel distribution method with water as the medium is given based on the sequential-solidification and rapid-cooling thought, and necessary conditions are provided for obtaining the castings with the tiny grain size and smoothly implementing powerful feeding.

Description

Aluminum-alloy wheel strength casting technique
Technical field
The invention belongs to light-alloy forming technique field, application belongs to aluminum-alloy wheel manufacturing industry
Background technology
At present, mainly based on casting technique, conventional casting technique includes the forming technology of domestic and international aluminum-alloy wheel Low pressure casting and gravitational casting.Low pressure casting process is that aluminium liquid is located in the holding furnace of mould lower section, by low-pressure gas pressure Effect aluminium liquid completes from bottom to top to fill type along stalk into mold cavity, and is solidified under the effect of low-pressure gas pressure And low pressure feeding is shaping wheel.Gravitational casting is the effect by gravity, carries out the top-down type that fills and casts, and also to lean on cast gate The action of gravity of place's liquid or the action of gravity of the special feeding intracavity liquid for arranging to realize process of setting in feeding.
Used as the important safety part of automobile, the quality of wheel hub directly affects the safety of automobile and light weight energy-conservation effect to wheel hub Really, two kinds of techniques of current gravity and low pressure casting are faced with some problems, and the common weakness of such as two kinds of techniques is exactly feeding Ability is weaker, plasticity index is low.The especially wheel of low pressure casting, the elongation percentage at the wheel disc of center is always unsatisfactory, weight Although the elongation percentage at the wheel center wheel disc of power casting is slightly above the product of low pressure casting, due to the presence of feeding cast gate, Cause stock utilization low and there are cast gate complex procedures, it is impossible to be satisfactory, and because gravity casting is present Volume gas phenomenon, causes cast-internal Jing to be commonly present the defects such as pore, shrinkage cavity and shrinkage porosite.
Number of patent application:" the auxiliary pressure gravity casting system of metal mold and casting method " disclosed in CN201310345280.5, The method is the casting of feed liquid side mould, and cast gate waste material is larger, and the present invention is cast using center, and center casting ensure that in cavity filling process The uniformity of strand circumferencial direction, the aluminium liquid at cast gate is strongly injected to mold cavity in the presence of feeding pressure, significantly Improve stock utilization;Compressed air feeding is adopted in the invention, pressure is 0.15-0.2MPa, and the present invention adopts feeding Piston carries out strong pressurizing feeding to feed liquid, and feeding pressure limit 0.1-3.0MPa, the two feeding pressure is different from method;From See in principle, the patent does not form near closed hollow ring from Jing mold cavities at the feeding pressurization of center up at the cast gate of side, the present invention Strength feeding be on closed mold cavity press.
Number of patent application:" gas pressure casting device for aluminum alloy wheel and its casting disclosed in CN200710027352.6C Method " and number of patent application:Disclosed 201320016053.3 " wheel hub antigravity feeding casting mould ", feeding in two patents Medium is compressed air, and the present invention carries out strong pressurizing feeding to feed liquid using the feeding piston that gap coordinates, Qian Zhewei Gas feeding, the latter is mechanical means feeding;The die cavity for being used for feeding pressurization in two patents is up-small and down-big truncated cone-shaped, obtains What is obtained is the foundry goods with dimpled half high truncated cone cast gate, still needs to further remove cast gate, and the feeding described in this patent adds Pressure chamber is the through hole of the uniform internal diameter coordinated with pressurizing piston gap, and effective pressurization feeding volume is the 6% of mold cavity, pressurization When feeding is completed, effective feeding volume is injected to mold cavity, therefore can be obtained without cast gate foundry goods, and cast gate work is eliminated naturally Sequence;The feeding compression chamber of the present invention is with the warm heater of benefit, it is ensured that the mobility of aluminium liquid during feeding, above-mentioned two is special Profit is not referred to;For the casting of all centers for many years generally existing aluminium liquid drop large impact wall bottom and general character that volume gas occur is asked Topic, in the present invention water conservancy diversion casting system is provided with, and is capable of achieving to fill type without volume gas casting and rate controlling, is to obtain high-quality foundry goods to establish Necessary basic condition, above-mentioned two patent not referred to and fill type content without volume gas water conservancy diversion and rate controlling.
Number of patent application:" aluminum-alloy wheel gravity compression casting ", the casting of the invention disclosed in 201210328935.3 Centered on position side opening casting, from the present invention casting position it is different, pour by the patent pipeline remaining less than lubrication groove bilabial The aluminium liquid of degree cannot be discharged smoothly, be unfavorable for batch production;Water conservancy diversion casting system is provided with the present invention, is capable of achieving without volume gas casting And rate controlling fills type, the patent is not directed to the content of this respect;The medium that the mould cooling of the patent is adopted is compressed air, is had no Specific cooling control principle, the cooling medium that this patent is adopted is recirculated water, and gives water route location mode and mould temperature Control point layout method.
The content of the invention
The invention discloses a kind of aluminum-alloy wheel strength casting method, it is unique in that:1)Invent strength to mend Contracting mould structure:Based on conventional top, bottom, side mould, in upper mould(1-8)Feeding compression chamber is additionally arranged at lumen centers(1-4) With can be in compression chamber(1-4)The feeding pressurizing piston for moving up and down(1-3)And water conservancy diversion piston(1-5);2)It is with this mould structure Basis, invention collection fills type feature, mends wyntet's sign, strength feeding feature, rapid sequential automatically without volume gas water conservancy diversion casting feature, rate controlling The aluminum-alloy wheel strength casting technique that solidification cooling water channel layout and Die temperature control measuring point position are integrated, the technique of the present invention Coordinate with corresponding strength Casting Equipment, the wheel product of production has the remarkable result that density is high, intensity is high and elongation percentage is high, And with higher production efficiency and stock utilization.
The aluminium alloy wheel hub strength casting mould structure of the present invention is characterized by:With conventional only by top, bottom, side module Into mould it is different, the present invention is on this basis, in upper mould(1-8)Center is additionally arranged feeding compression chamber(1-4)With can be Feeding compression chamber(1-4)The feeding pressurizing piston for inside moving up and down(1-3)And water conservancy diversion piston(1-5), feeding compression chamber(1-4)It is One internal diameter is the cylindrical member of D, its lower end and upper mould(1-8)Spider be connected, its outside is provided with and mend automatically warm device(1-7), Its internal diameter D is by upper mould centre bore and die cavity UNICOM, feeding pressurizing piston(1-3)With water conservancy diversion piston(1-5)With feeding compression chamber (1-4)Internal diameter be gap coordinate, fit clearance in 0.08-0.15mm, when water conservancy diversion piston(1-5)Row is to bottom certain position When, feeding compression chamber(1-4)The die cavity of endoporus and mould be UNICOM, compression chamber(1-4)Internal diameter D and height H determination Foundation be:According to the ratio that aluminum alloy solidification shrinks, compression chamber(1-4)Effective feeding volume C should be not less than mold cavity The 6% of volume, compression chamber(1-4)The determination of height H should meet the requirement of feeding volume C, meet again when whole liquid are poured Ru Hou feeding compression chamber(1-4)Liquid level should be slightly above the peak of lubrication groove lip, it is determined that feeding compression chamber(1-4)Height H, Just feeding compression chamber can be determined for definite value according to feeding volume C(1-4)Internal diameter D(General span is in 50-80mm).
The aluminum-alloy wheel strength casting method process feature of the present invention is embodied in:Temperature is quantitative at 695-710 DEG C Aluminium liquid injection outlet carries drainage screen(1-20)The tundish with quantitative weighing function(1-2)In, by tundish after matched moulds(1-2) Outlet alignment feeding compression chamber(1-4)Entrance, open tundish(1-2)Without volume gas guiding device according to volume while gate out switch The speed of journey setting smoothly drives water conservancy diversion piston(1-5)Move downward, aluminium liquid is in water conservancy diversion piston(1-5)Guiding under enter mend Contracting compression chamber(1-4), and by water conservancy diversion piston(1-5)Position control feeding compression chamber(1-4)With the passway of mold cavity Aperture carry out rate controlling and fill type, mold cavity removes tundish after being full of(1-2), feeding pressurizing piston(1-3)Into feeding pressurization Room(1-4)Strength feeding is carried out, compression chamber during this(1-4)Automatically warm system and rapid sequential solidification cooling temperature control system are mended Coordinate in real time, solidification terminates rear feeding pressurizing piston(1-3)Return, part is molded out, using this technique productions different size wheel Foundry Production beat be 160-220s/ parts.
The aluminum-alloy wheel strength casting method of the present invention has without volume gas water conservancy diversion casting function, it is characterised in that:According to Vacuum suction water conservancy diversion principle, in circular feeding compression chamber(1-4)Inwall is provided with the water conservancy diversion piston that therewith gap coordinates(1-5), Aluminium liquid is with water conservancy diversion piston during casting(1-5)Move down according to the speed for pre-seting, smoothly full of compression chamber(1-4), disappear Except aluminium liquid flings the volume gas phenomenon that bottom produces because drop is larger.
The rate controlling of the aluminum-alloy wheel strength casting method of the present invention is filled type and is characterised by:Aluminium liquid filling toward mold cavity Type speed depends on water conservancy diversion piston(1-5)The bypass type face of upper end and feeding compression chamber(1-4)Passway between lower outlet is opened Degree, the present invention is by driving water conservancy diversion piston(1-5)Move to realize the control to access portal aperture, and then realize to wheel not Flow-control when filling type with position, the discharge of mould type intracavity gas when this contributes to filling type.
The strength feeding of the aluminum-alloy wheel strength casting method of the present invention is characterised by:Pressurizeed by mold cavity, feeding Room(1-4)And feeding pressurizing piston(1-3)Constitute closed die cavity, if the solidification of the aluminium liquid in die cavity be from outward appearance to inner essence, by away from Feeding compression chamber(1-4)Wheel rim to core wheel or even feeding compression chamber(1-4)It is consecutive solidification, then, when feeding pressurization is lived Plug(1-3)When moving down and apply pressure, not solidified aluminium liquid can defer to Pascal's law by feeding pressurizing piston(1- 3)On pressure in the way of isostatic pressed to each side transmission, until distal end freezing point, feeding compression chamber(1-4)Interior aluminium liquid exists Under pressure continuous action, injected in real time to mold cavity, according to the volume ratio that aluminum alloy solidification shrinks, by feeding compression chamber (1-4)Inject the aluminium liquid volume in mold cavity and should be the 6% of mold cavity volume, so-called " strength feeding " refers to feeding pressure Power scope is 0.1-3MPa, and far above gravity and the feeding pressure of low pressure casting, maximum pressure is low pressure casting feeding pressure 30 times, because liquid is solidified at a higher pressure, therefore more preferable feeding effect and more fine and close can be obtained Foundry goods.
The aluminum-alloy wheel strength casting method of the present invention, set pressurization feeding room has and mend automatically temperature casting feature, The automatic benefit temperature pours what feature was realized in:In feeding compression chamber(1-4)Outside is provided with the warm device of benefit(1-7), work as thermometric When the temperature of point is less than setting value, turn on automatically mends warm device to compression chamber(1-4)It is warm to setting that temperature is carried out plus vulcanized with feed liquid Spend and disconnect automatically, make feeding compression chamber(1-4)Interior feed liquid has preferable mobility during type and feeding is filled.
The aluminum-alloy wheel strength casting method of the present invention, described mold temperature control measuring point with water as medium and cold But water route location mode, is proposed based on consecutive solidification, quick cooling thought, is to coordinate the mould temperature of strength Casting Equipment Control system and design, the cooling water channel location mode described in patent claims 1 is referred to:Multilamellar with water as cooling medium Mould cooling distribution method and multipoint mode side mould cool down distribution method under mould cooling distribution method, polycycle in formula.Mould on described multiple field Cooling distribution method is referred to:The mould cooling point under the annular water channel of the top-down arranging multiplayer of the inner chamber of upper mould, the polycycle Cloth method to refer to and be provided with multiple annular water channels in lower mould bottom surface, the multipoint mode while mould cool down distribution method refer to while mould outboard wheel Rim is provided with point cooling water route with each spoke intersection;The survey for mold temperature control described in the claims in the present invention 1 Warm spot layout is referred to:Using mould measuring point temperature as target variable, to approximate for the such continuous media temperature field of mould Represent, for bed die just in spoke, in, it is outer arrangement it is most 3 points setting temperature sensors(Fig. 2, Tm1、Tm2、Tm3), For side mould at most arranges 2 temperature sensors in upper lower rim corresponding position(Fig. 2, Tm4、Tm5), variable Tm1, Tm2 ... Tm5 make It is control variable to characterize the state of mold temperature field;In addition be also provided with cooling water inlet/outlet temperature sensor (Fig. 2, TW1、TW2、…TW7) as reference variable;There is provided as temperature sensor and the corresponding strength casting machine for determining control variable Flow velocity valve(Q1 in Fig. 2, to q7), water flow sensor (Q1 to Q7 in Fig. 2), electromagnetic switch (K1 to K7 in Fig. 2) and PLC is together Composition mould cooling TT&C system.Can pass through to change the water flow velocity q per roadi, i=1,2…nTotal flow QI, i=1,2 ... n,With the water flowing moment ti,i=1,2…nThree class basic variables are carrying out the regulation of mold temperature, the temperature value T of measuring pointm iTo adjust as three class basic variables Whole target, it is this with water as cooling medium, using water flow velocity, flow and water flowing moment as basic variable, with mould control point Temperature is the mold temperature monitoring system of control variable, provides numerical basis for processing parameter setting and adjustment and adjusts with digitized Control means.
Compared with existing aluminum-alloy wheel casting technique, using aluminum-alloy wheel strength casting technique of the invention, it has Beneficial has technical effect that:
(1)Solve the problems, such as in gravitational casting and low pressure casting feeding pressure is little, solve pouring for gravitational casting presence The problems such as casting volume gas, dead head are big, filling velocity is difficult to control to and easily casting flaw occurs;
(2)Strength feeding shortens the die casting time in combination with flash set technology, improves production efficiency, improves Consistency, casting blank crystal grains degree is refined;
(3)The wheel strand for obtaining compares gravitational casting blank weight saving 10% without cast gate, not only increases material profit With rate, and reduce and follow-up go cast gate operation;
(4)Using the technique, wheel disc both sides obtain half deep centre taper hole, and when eliminating casting rotation sequence is machined in advance, can be straight Tape splicing waste heat carries out hot rotation into spinning machine;
(5)Wheel hub product mechanical property using this technique productions is good:Strength ratio low pressure casting improves and significantly improves, extends Rate can reach 5-8%;The casting strength due to the process strengthening, and then product can be brought with thinning wheel rim and spoke thickness Lightweight energy-saving effect.
4th, illustrate
Fig. 1 strength casting mould structure schematic diagrams.
Fig. 2 water cooling mold temperature control system schematic diagrams.
Strength casting mould structure shown in Fig. 1 mainly includes:Casting machine slide block(1-1), tundish(1-2), feeding adds Pressure piston(1-3), feeding compression chamber(1-4), water conservancy diversion piston(1-5), upper mould coolant outlet(1-6), mend warm heater(1- 7), upper mould(1-8), Bian Mo(1-9), bed die cooling medium outlet(1-10), bed die(1-11), die bottom plate(1-12), water conservancy diversion Oil cylinder(1-13), casting machine worktable(1-14), bed die ring-type cooling zone(1-15), bed die cooling medium entrance(1-16), side Mould cooling tube(1-17), upper mould be layered cooling zone(1-18), upper mould cool down entrance(1-19), feed liquid drainage screen(1-20), connection Pillar(1-21).
Fig. 2 water cooling mold temperature control systems schematic diagram is constituted to be included:Mould temperature transducer(Tm1、Tm2、Tm3、Tm4、Tm5)、 Cooling water inlet temperature sensor (T0), cooling water outlet temperature sensor (Tw1 to Tw7), the discharge with throttling function is passed Warm heater K8, pressure chamber temperature sensor T8 mend in sensor (Q1 to Q7), electromagnetic switch (K1 to K7), compression chamber.
5th, specific embodiment
Specific embodiment is described in detail below in conjunction with accompanying drawing(The present embodiment be to the present invention furtherly It is bright, rather than any restriction that the present invention is made).
Detailed rules for the implementation are illustrated with reference to accompanying drawing 1, by taking a 16X6.5 cun of aluminum-alloy wheel as an example, using this technique Casting process is:
(1)Mould is preheated first, mold preheating temperature is 280 DEG C, aluminum alloy materials are A356, the heating of aluminium liquid Temperature is 700 DEG C, as shown in figure 1, before work casting mould is attached on casting machine first, upper mould(1-8)And top The parts such as plate are by connecting pillar(1-21)With casting machine slide block(1-1)It is connected, bed die(1-11)By die bottom plate(1-12)Peace It is filled to casting machine worktable(1-14)Upside, Bian Mo(1-9)It is connected with the side mould oil cylinder of casting machine.
(2)By tundish(1-2)Middle to load quantitative liquid material, liquid material volume is equal to mold cavity volume and feeding volume sum, its Middle feeding volume is calculated according to the 6-8% of total material liquid volume, by tundish(1-2)Move to feed entrance point and feeding compression chamber(1-4)Phase Connect, now die casting machine water conservancy diversion oil cylinder(1-13)Drive water conservancy diversion piston(1-5)It is up to move to tundish(1-2)Lower section, then tundish(1- 2)Output switch open, the aluminium liquid in tundish flows into therewith feeding compression chamber(1-4)In, at the same time water conservancy diversion piston(1-5) It is descending, feed liquid is slowly and steadily caused in mold cavity, type mold cavity is filled by setting speed, fill after type is finished and remove aluminium liquid Tundish(1-2).
(3)The feeding pressurizing piston of die casting machine(1-3)It is descending, to feeding compression chamber(1-4)In, liquid level is pressurizeed, The pressure of strength feeding is 0.1-3.0MPa, now goes up mould(1-8), bed die(1-11)And side mould(1-9)Cooling water according to setting Fixed cooling order is opened.
(4)Upper mould(1-8)In be provided with layering dividing plate, layering dividing plate and upper mould(1-8)The upper mould layering cooling zone of die cavity composition (1-18), upper mould cooling entrance(1-19)With upper mould coolant outlet(1-6)Each cooling layer is each led into, is realized to upper mould(1-8) Cooling, adopt water as cooling medium, the upper mould of mould(1-8)Be divided into three layers, be connected with respectively three tunnels can thermometric, control flow and The inlet channel of opening and closing, and three tunnels can thermometric water return pipeline;Mold bottom die(1-11)Inside also is provided with the cooling of bed die ring-type Area(1-15), bed die cooling medium entrance(1-16)With the outlet of bed die cooling medium(1-10)Die bottom plate is located at respectively(1-12) Both sides, die bottom plate(1-12)Inside is provided with cooling duct can be by cooling pipe and bed die ring-type cooling zone(1-15)Connection, mould Tool bed die(1-11)Be divided into tricyclic structure, be connected with respectively three tunnels can thermometric, control flow and opening and closing cooling pipe, and three tunnels Can thermometric cooling circuit pipeline;Bian Mo(1-9)On be provided with Cooling Holes, side mould cooling tube on position to spoke spoke(1-17) It is installed on side mould(1-9)In Cooling Holes, into and out of cooling water pipe side mould cooling tube is respectively connected to(1-17)In, realize opposite side mould Multiple spot is cooled down.Temperature control cooling duct is engaged with the control system of equipment, takes away according to the temperature of mould point for measuring temperature and per road Caloric value, in combination with sequencing contro is opened in cooling, with consecutive solidification cooling mesh is controlled to by flow velocity, Flow-rate adjustment Target mould temperature regulation and control method come implement regulation and control arrange.
(5)Feeding pressurizing piston after slab cooling(1-3)Lifted, the mould when mould oil cylinder is pulled(1-9)Open, subsequently casting Machine slide block(1-1)Mould on driven mold(1-8)Lifted, strand discharging to unloading position, so far whole wheel hub casting process is finished.

Claims (6)

1. a kind of aluminum-alloy wheel strength casting method, it is characterised in that:Comprise the steps:
(1)Mould is preheated first, mold preheating temperature is 280 DEG C, aluminum alloy materials are A356, the heating-up temperature of aluminium liquid For 700 DEG C, before work casting mould is attached on casting machine first, upper mould(1-8)And top board is by connecting pillar (1-21)With casting machine slide block(1-1)It is connected, bed die(1-11)By die bottom plate(1-12)It is attached to cast machine worktable(1- 14)Upside, Bian Mo(1-9)It is connected with the side mould oil cylinder of casting machine;
(2)By tundish(1-2)Middle to load quantitative liquid material, liquid material volume is equal to mold cavity volume and feeding volume sum, wherein mending Contracting volume is calculated according to the 6-8% of total material liquid volume, by tundish(1-2)Move to feed entrance point and feeding compression chamber(1-4)It is connected, Now die casting machine water conservancy diversion oil cylinder(1-13)Drive water conservancy diversion piston(1-5)It is up to move to tundish(1-2)Lower section, then tundish(1-2) Output switch open, the aluminium liquid in tundish flows into therewith feeding compression chamber(1-4)In, at the same time water conservancy diversion piston(1-5)Under OK, feed liquid is slowly and steadily caused in mold cavity, by setting speed type mold cavity is filled, filled and remove aluminium liquid after type is finished and pour Cup(1-2);
(3)The feeding pressurizing piston of die casting machine(1-3)It is descending, to feeding compression chamber(1-4)In, liquid level is pressurizeed, strength The pressure of feeding is 0.1-3.0MPa, now goes up mould(1-8), bed die(1-11)And side mould(1-9)Cooling water according to setting Cooling order is opened;
(4)Upper mould(1-8)In be provided with layering dividing plate, layering dividing plate and upper mould(1-8)The upper mould layering cooling zone of die cavity composition(1- 18), upper mould cooling entrance(1-19)With upper mould coolant outlet(1-6)Each cooling layer is each led into, is realized to upper mould(1-8)It is cold But, cooling medium, the upper mould of mould are adopted water as(1-8)It is divided into three layers, three tunnels are connected with respectively can thermometric, control flow and opening and closing Inlet channel, and three tunnels can thermometric water return pipeline;Mold bottom die(1-11)Inside also is provided with bed die ring-type cooling zone(1- 15), bed die cooling medium entrance(1-16)With the outlet of bed die cooling medium(1-10)Die bottom plate is located at respectively(1-12)Both sides, Die bottom plate(1-12)Inside is provided with cooling duct can be by cooling pipe and bed die ring-type cooling zone(1-15)Connection, mold bottom die (1-11)Be divided into tricyclic structure, be connected with respectively three tunnels can thermometric, control flow and opening and closing cooling pipe, and three tunnels can thermometric Cooling circuit pipeline;Bian Mo(1-9)On be provided with Cooling Holes, side mould cooling tube on position to spoke spoke(1-17)It is installed on Bian Mo(1-9)In Cooling Holes, into and out of cooling water pipe side mould cooling tube is respectively connected to(1-17)In, realize that the multiple spot of opposite side mould is cold But, temperature control cooling duct is engaged with the control system of equipment, the caloric value taken away according to the temperature of mould point for measuring temperature and per road, In combination with sequencing contro is opened in cooling, the mould for being controlled to target is cooled down with consecutive solidification by flow velocity, Flow-rate adjustment Warm regulation and control method come implement regulation and control arrange;
(5)Feeding pressurizing piston after slab cooling(1-3)Lifted, the mould when mould oil cylinder is pulled(1-9)Open, subsequent casting machine is slided Block(1-1)Mould on driven mold(1-8)Lifted, strand discharging to unloading position, so far whole wheel hub casting process is finished.
2. aluminum-alloy wheel strength casting method according to claim 1, it is characterised in that:Upper mould(1-8)Center has There is feeding compression chamber(1-4)With can be in feeding compression chamber(1-4)The feeding pressurizing piston for inside moving up and down(1-3)And water conservancy diversion piston (1-5), feeding compression chamber(1-4)It is cylindrical member that an internal diameter is D, its lower end and upper mould(1-8)Spider be connected, its outside With the warm device of benefit automatically(1-7), it is by upper mould centre bore and die cavity UNICOM, feeding pressurizing piston(1-3)With water conservancy diversion piston (1-5)With feeding compression chamber(1-4)Internal diameter be gap coordinate, fit clearance in 0.08-0.15mm, when water conservancy diversion piston(1-5) When row is to bottom certain position, feeding compression chamber(1-4)The die cavity of endoporus and mould be UNICOM, compression chamber(1-4)Have Effect feeding volume is not less than the 6% of mold cavity volume, compression chamber(1-4)Internal diameter D spans are in 50-80mm.
3. aluminum-alloy wheel strength casting method according to claim 1, it is characterised in that:Feeding pressurizing piston(1-3) Into feeding compression chamber(1-4)Strength feeding is carried out, compression chamber during this(1-4)Automatically warm system and rapid sequential solidification are mended Cooling temperature control system coordinates in real time, and solidification terminates rear feeding pressurizing piston(1-3)Return, mold out part, this method production wheel Beat is 160-220s/ parts.
4. aluminum-alloy wheel strength casting method according to claim 1, it is characterised in that:The filling velocity of aluminium liquid depends on In water conservancy diversion piston(1-5)The bypass type face of upper end and feeding compression chamber(1-4)The aperture of the passway between lower outlet, by driving Water conservancy diversion piston(1-5)Move to realize the control to access portal aperture.
5. aluminum-alloy wheel strength casting method according to claim 1, it is characterised in that:Added by mold cavity, feeding Pressure chamber(1-4)And feeding pressurizing piston(1-3)Constitute closed die cavity, feeding compression chamber(1-4)Interior aluminium liquid is persistently made in pressure With under, injected in real time in mold cavity, feeding pressure is up to 3MPa.
6. aluminum-alloy wheel strength casting method according to claim 1, it is characterised in that:In feeding compression chamber(1-4) Outside is provided with the warm device of benefit(1-7), when the temperature of point for measuring temperature is less than setting value, turn on automatically mends warm device to compression chamber(1- 4)Carry out mending temperature with feed liquid.
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