CN108746566B - A kind of wheel hub casting method that can reinforce ear intensity on wheel hub - Google Patents
A kind of wheel hub casting method that can reinforce ear intensity on wheel hub Download PDFInfo
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- CN108746566B CN108746566B CN201810582999.3A CN201810582999A CN108746566B CN 108746566 B CN108746566 B CN 108746566B CN 201810582999 A CN201810582999 A CN 201810582999A CN 108746566 B CN108746566 B CN 108746566B
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- wheel hub
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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
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/13—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of gas pressure
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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
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Abstract
The present invention provides the wheel hub casting methods that one kind can reinforce ear intensity on wheel hub, comprising the following steps: S1, grilled mold；S2, to mould surface spraying release agent；S3, by mold clamping；S4, the molten metal of casting hub is poured into mold, and molten metal is filled in casting mold cavity and molten metal storage room；S5 after casting complete, is rapidly cooled to the molten metal for forming ear on wheel hub in casting mold cavity is located at；While pressurizeing to the indoor molten metal of molten metal storage is stored in, so that the molten metal is stored indoor molten metal and abundant feeding first is carried out to ear on wheel hub under high pressure；Then again successively to wheel hub other parts cooled and solidified；S6 after the completion of wheel hub solidifies completely, stops pressurization, and molten metal is discharged and stores indoor gas；S7, die sinking carry out demoulding to the wheel hub of cast molding, remove the wheel hub of cast molding.Of the invention sufficiently can carry out abundant feeding to ear on wheel hub, improve the quality of ear and entire wheel hub on wheel hub.
Description
Technical field
The present invention relates to wheel hub casting technology fields, more particularly to a kind of wheel hub casting that can reinforce ear intensity on wheel hub
Method.
Background technique
Wheel hub is the important spare part of automobile, and the quality of wheel hub blank has large effect to the quality of wheel hub；And it takes turns
Ear is that wheel hub is easy to happen fracture in use on hub, and the quality of ear often decides the quality of wheel hub on wheel hub as a result,.
Currently, gravitational casting and low pressure casting use are more universal, but have the following deficiencies:
1) gravity casting process aluminium alloy liquid internal can generate gas, and gas is viscous because of the molten metal height by casting hub
The constraint of degree is difficult to be discharged, and bulk gas is trapped in cast-internal, forms stomata；In addition, the molten metal of casting hub is in nothing
Carry out crystallization and freezing under pressure condition, feeding is difficult, the case where being easy to produce coarse grains, crystal phase nonuniform organization at thermal center point；
Influence the quality on wheel hub at ear.
2) shaped crystalline solidifies low pressure casting at low pressures, and the pressure for being generally applicable in production is only 0.9~1.2KGF/
㎝ 2, and then there is the security risk that stalk splits, furnace body easily explodes in intensified pressure.Under the limitation of low-pressure, crystallization
Process of setting feeding is insufficient, moreover, the wheel rim on wheel hub below ear is relatively thin prior to ear cooled and solidified on wheel hub, on wheel hub ear without
Method obtains effective feeding.
Summary of the invention
Therefore, in view of the above problems, it is an object of the invention to overcome above-mentioned the deficiencies in the prior art, providing a kind of can have
Effect carries out abundant feeding to ear on wheel hub, and improving the quality of ear on wheel hub and improving the quality of entire wheel hub can reinforce taking turns
The wheel hub casting method of ear intensity on hub.
The technical solution that the present invention solves above-mentioned technical problem technology is as follows: one kind can reinforce the wheel of ear intensity on wheel hub
Hub casting method, comprising the following steps:
S1, grilled mold；
S2, to mould surface spraying release agent；
Mold clamping is formed the casting mold cavity of wheel hub to be cast by S3 in the mold after molding, the storage being mounted on mold
The molten metal storage room for carry out hub cast feeding for storing molten metal is formed between liquid bucket and casting mold cavity；
S4, the molten metal of casting hub is poured into from cast gate into mold, and molten metal is filled in casting mold cavity and molten metal
In storage room；
S5, after casting complete, to formed in the molten metal and casting mold cavity being located in running channel the molten metal of ear on wheel hub into
Row is quickly cooled down；While pressurizeing to the indoor molten metal of molten metal storage is stored in, keep the molten metal storage indoor
Molten metal first carries out abundant feeding to ear on wheel hub under high pressure；Then again successively to wheel hub other parts cooled and solidified；
S6 after the completion of wheel hub solidifies completely, stops pressurization, and molten metal is discharged and stores indoor gas；
S7, die sinking carry out demoulding to the wheel hub of cast molding, remove the wheel hub of cast molding.
The beneficial effects of the present invention are: the wheel hub casting method provided by the invention that can reinforce ear intensity on wheel hub passes through
Be provided in upper mold for store molten metal and into casting mold cavity carry out feeding liquid storage bucket, into casting mold cavity inject gold
Belong to liquid, be full of molten metal in liquid storage bucket, after casting complete, the molten metal in Xiang Suoshu liquid storage bucket applies high pressure, the liquid storage bucket
Interior molten metal carries out abundant feeding into casting mold cavity in the case where the gas pressurization system applies high pressure.Therefore, by this hair
The wheel hub of the bright wheel hub casting method casting and forming that can reinforce ear intensity on wheel hub, feeding is abundant, no riser, and reserves and add
Spare time measures less, hub cast deflection reduces, and improves the production efficiency of wheel hub.
In addition, on the basis of the wheel hub casting method that can reinforce ear intensity on wheel hub in the above-described embodiments, this hair
It is bright to do following improvement, there can also be following additional technical feature.
Further, in S5, successively wheel hub other parts cooled and solidified is specifically included: successively to the wheel rim of wheel hub, spoke,
Wheel disc and wheel disk center are cooling；Convenient for improving the quality of molding hub cast.
Further, in step S1, the grilled mold is specifically included: to the side mode of mold, upper mold, bed die and being mounted on upper mold
On liquid storage bucket carry out being heated to 650~710 DEG C.Ensure to pour into the not too fast cooling of the molten metal in casting mold cavity and to flow
Property quickly reduce, influence wheel hub molding, also reduce molten metal storage room molten metal temperature reduce degree, convenient for pressurization make it
Flowing carries out feeding to hub cast.
Further, in step S4, the molten metal poured into mold, molten metal volume is equal to casting mold cavity volume and feeding
The sum of volume, wherein feeding volume is the 6-8% of total molten metal volume；Pour into the molten metal of sufficient amount, it is ensured that feeding is abundant.
It further, is segmented to being stored in molten metal to store the mode that indoor molten metal pressurizes in step S5
Pressurization, it can be ensured that feeding is abundant, and reduces electric energy loss.
Further, in step S5, indoor six sections of pressurizations of molten metal progress are stored to molten metal is stored in, wherein
In step S5, indoor six sections of pressurizations of molten metal progress are stored to molten metal is stored in, wherein
First segment, in the period of 1~3S, moulding pressure is 0.5~0.8KGF/cm2；
Second segment, in the period of 3~10S, moulding pressure is 0.8~2KGF/cm2；
Third section, in the period of 10~15S, moulding pressure is 2~6KGF/cm2；
4th section, in the period of 15~50S, moulding pressure is 6~3KGF/cm2；
5th section, in the period of 50~150S, moulding pressure is 3~2KGF/cm2；
6th section, in the period of 150~210S, moulding pressure is 2~1.5KGF/cm2.
Temperature is higher when the hub type chamber just poured into due to molten metal, convenient for flowing, and with the extension of time, molten metal
It decreases, not solidified part mobility is deteriorated.It is pressurizeed by segmented, is conducive to pressurize to molten metal, mobility
Intensified pressure when variation, it can be ensured that feeding is abundant, and reduces electric energy loss.
Further, it in S5, is pressurizeed, is added to the indoor molten metal of molten metal storage is stored in by gas pressurization system
Pressure medium is drying compressed air；Pressurization is convenient, and pressure is stable and convenient for control, is also prevented from air and causes unfavorable shadow to casting
It rings.
Further, the molten metal is molten aluminum, and the temperature of molten aluminum is 700~720 DEG C, the density of the molten aluminum is 2.6~
2.7g/㎝3；Temperature is too low, and molten aluminum mobility is bad, has the phenomenon that solidifying in advance, influences quality；And temperature is too high,
Meeting influences wheel hub quality so that cooling time is long；In addition, the density of molten aluminum is appropriate, it is convenient for flowing forming.
Detailed description of the invention
Fig. 1 is the casting flow diagram of the wheel hub casting method that can reinforce ear intensity on wheel hub of the invention.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Embodiment:
As shown in Figure 1, conducting wire provided by the invention weldering hook bending and molding device includes: that can to reinforce ear on wheel hub strong for one kind
The wheel hub casting method of degree, comprising the following steps:
S1, grilled mold；
S2, to mould surface spraying release agent；
Mold clamping is formed the casting mold cavity of wheel hub to be cast by S3 in the mold after molding, the storage being mounted on mold
The molten metal storage room for carry out hub cast feeding for storing molten metal is formed between liquid bucket and casting mold cavity；
S4, the molten metal of casting hub is poured into from cast gate into mold, and molten metal is filled in casting mold cavity and molten metal
In storage room；
S5, after casting complete, to formed in the molten metal and casting mold cavity being located in running channel the molten metal of ear on wheel hub into
Row is quickly cooled down；While pressurizeing to the indoor molten metal of molten metal storage is stored in, keep the molten metal storage indoor
Molten metal first carries out abundant feeding to ear on wheel hub under high pressure；Then again successively to wheel hub other parts cooled and solidified；
S6 after the completion of wheel hub solidifies completely, stops pressurization, and molten metal is discharged and stores indoor gas；
S7, die sinking carry out demoulding to the wheel hub of cast molding, remove the wheel hub of cast molding.
Specifically, the grilled mold in the present embodiment in step S1, i.e. opening mold heating system, to side mode, upper mold and bed die
It is heated, and is connected with the liquid storage bucket for storing molten metal in upper mold, liquid storage bucket is connected with liquid storage bucket heating system；Opposite side
Liquid storage bucket heating system is opened while mould, upper mold and bed die are heated to heat liquid storage bucket；Specifically, in step S2
To mould surface spraying release agent, specifically to side mode, upper mold and the bottom for being used for the mold that wheel hub is cast being mounted on casting machine
Mould surface sprays release agent.S3, molding will form the casting mold cavity of wheel hub to be cast after the molding of side mode, upper mold and bed die, and store up
The molten metal storage room for carry out hub cast feeding for storing molten metal is formed between liquid bucket and casting mold cavity.
Specifically, after casting complete, running channel cooling system can be opened in the present embodiment in step S5, to positioned at running channel
Interior molten metal is cooled down, and the molten metal in running channel is quickly cooled down；Prevent molten metal in running channel flow backwards from running channel or from
Cast gate outflow can also fill cast gate by plugging device and block.Specifically, the present embodiment is pressurizeed by gas pressurization system, it is right
It is stored in the indoor molten metal of molten metal storage to pressurize, opens simultaneously the position of ear on molding wheel hub in setting casting mold cavity
Ear cooling system on wheel hub in the side mode or/and upper mold of surrounding, quickly to the molten metal for forming ear on wheel hub in casting mold cavity
Cooling makes quickly to solidify；The molten metal is set to store indoor molten metal in the case where the gas pressurization system applies high pressure first to wheel
Ear carries out abundant feeding on hub, then again successively to the wheel rim of wheel hub, spoke, wheel disc and wheel disk center successively cooled and solidified.
The wheel hub casting method provided in this embodiment that can reinforce ear intensity on wheel hub is particularly suitable for 18 inches of casting
Or more wheel hub, independently ear on wheel hub is cooled down by being equipped with ear cooling system on hub, convenient for ear on control wheel hub
It is cooled and shaped, prevents the relatively thin molten metal for briquetting roller hub rim for being located at ear lower end on molding wheel hub first cooling and make
Molten metal cannot be introduced into the type chamber on molding wheel hub at ear, and ear on wheel hub is made to be unable to get effective feeding, cause wheel hub
Upper ear casting is insufficient.
In one embodiment of the invention, in step S1, the grilled mold is specifically included: to the side mode, upper mold, bottom of mold
Mould and the liquid storage bucket being mounted in upper mold carry out being heated to 650~710 DEG C.Ensure to pour into molten metal in casting mold cavity only
Fast cooling and making mobility quickly reduces, influence wheel hub molding, also reduce what the molten metal temperature of molten metal storage room reduced
Degree makes its flowing carry out feeding to hub cast convenient for pressurization.
In one embodiment of the invention, in step S4, the molten metal poured into mold, molten metal volume is equal to casting
The sum of moulding cavity volume and feeding volume, wherein feeding volume is the 6-8% of total molten metal volume；Ensure that feeding is abundant.
In one embodiment of the invention, in step S5, add to the indoor molten metal of molten metal storage is stored in
The mode of pressure is segmented pressurization.The present embodiment stores indoor molten metal progress segmented pressurization to molten metal is stored in, can
Ensure that feeding is abundant, and reduces electric energy loss.
In one embodiment of the invention, in step S5, indoor molten metal progress six is stored to molten metal is stored in
Section pressurization, wherein first segment, in the period of 1~3S, moulding pressure is 0.5~0.8KGF/cm2；Second segment, in 3~10S
Period, moulding pressure be 0.8~2KGF/cm2；Third section, in the period of 10~15S, moulding pressure is 2~6KGF/
cm2；4th section, in the period of 15~50S, moulding pressure is 6~3KGF/cm2；5th section, in the period of 50~150S,
Moulding pressure is 3~2KGF/cm2；6th section, in the period of 150~210S, moulding pressure is 2~1.5KGF/cm2.Due to
Temperature is higher when the hub type chamber that molten metal has just poured into, convenient for flowing, and with the extension of time, molten metal decreases, not
The part mobility of solidification is deteriorated.The present embodiment is pressurizeed by segmented, is conducive to pressurize to molten metal, and mobility is deteriorated
When intensified pressure, it can be ensured that feeding is abundant, and reduce electric energy loss.Specifically, gas pressurization system described in the present embodiment uses
Drying compressed air；Prevent air from adversely affecting to casting.
In addition, also adding in the present embodiment for segmented to being stored in molten metal and store indoor molten metal and carry out pressuring method
Pressure, point six Duan Jinhang, wherein first segment, moulding pressure are 0.5~0.8KGF/cm2Between arbitrary value, a length of 2 when pressurization
~5S；Second segment, moulding pressure are 0.8~2KGF/cm2Between arbitrary value, when pressurization a length of 6~9S；Third section, pressurization pressure
Power is 2~6KGF/cm2Between arbitrary value, when pressurization a length of 4~7S；4th section, moulding pressure is 3~6KGF/cm2Between
Arbitrary value, when pressurization a length of 30~40S；5th section, moulding pressure is 2~3KGF/cm2Between arbitrary value, when pressurization is a length of
90~115S；6th section, moulding pressure is 1.5~2KGF/cm2Between arbitrary value, pressurize a length of 55~70S.Specifically, this
In each pressurization duration, pressure value can be a constant pressure value or changes the pressure value of very little embodiment,
It is also possible to the pressure changed in a certain range.
In one embodiment of the invention, further, the molten metal is molten aluminum, and the temperature of molten aluminum is 700~720
DEG C, the density of the molten aluminum is 2.6~2.7g/ ㎝3；Temperature is too low, and molten aluminum mobility is bad, has showing of solidifying in advance
As influencing quality；And temperature is too high, and cooling time can be made long, influences wheel hub quality；In addition, the density of molten aluminum is appropriate, just
In flowing forming.
Specifically, the molten metal of the present embodiment is molten aluminum, aluminium alloy wheel hub is formed for casting；In addition, the present embodiment
High pressure hub casting mould is for when casting steel wheel hub, molten metal to be molten steel；And the high pressure hub casting mould of the present embodiment is used
When cast magnesium alloy wheel hub, molten metal is magnesium liquid；The specific ingredient of molten metal with specific reference to need the wheel hub characteristic that casts into
Row is prepared.
Specifically, the wheel hub casting method provided by the invention that can reinforce ear intensity on wheel hub, is particularly suitable for
18 inches and above wheel hub are cast, by being provided in upper mold for storing molten metal and being mended into casting mold cavity
The liquid storage bucket of contracting, injects molten metal into casting mold cavity, is full of molten metal in liquid storage bucket, after casting complete, by being equipped on hub
Ear cooling system independently cools down ear on wheel hub, is cooled and shaped convenient for ear on control wheel hub, prevents from being located at molding wheel hub
The relatively thin molten metal for briquetting roller hub rim of upper ear lower end is first cooling and molten metal is made to cannot be introduced into molding wheel hub
In type chamber at upper ear, and ear on wheel hub is made to be unable to get effective feeding, causes ear casting on wheel hub insufficient.Therefore, sufficiently
Abundant feeding is carried out to ear on wheel hub, improves the quality of ear and the quality of the entire wheel hub of raising on wheel hub.
In the present invention, term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " peace
Dress ", " connected ", " connection ", the terms such as " fixation " shall be understood in a broad sense, can also be with for example, " connection " may be a fixed connection
It is to be detachably connected, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.It is right
For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In description of the invention, it is to be understood that the orientation or position of the instructions such as term " on ", "lower", "front", "rear"
Relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, without referring to
Show or imply that signified device or unit there must be specific direction, be constructed and operated in a specific orientation, it is thus impossible to manage
Solution is limitation of the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. the wheel hub casting method that one kind can reinforce ear intensity on wheel hub, which comprises the following steps:
S1, grilled mold, i.e. opening mold heating system, heats side mode, upper mold and bed die, and be connected in upper mold for storing up
The liquid storage bucket of molten metal is deposited, liquid storage bucket is connected with liquid storage bucket heating system；It is beaten while heating to side mode, upper mold and bed die
Liquid storage bucket heating system is opened liquid storage bucket is carried out to be heated to 650~710 DEG C；
S2, to mould surface spraying release agent；
Mold clamping is formed the casting mold cavity of wheel hub to be cast by S3 in the mold after molding, the liquid storage bucket being mounted on mold
The molten metal storage room for carry out hub cast feeding for storing molten metal is formed between casting mold cavity；
S4, the molten metal of casting hub is poured into from cast gate into mold, and molten metal is filled in casting mold cavity and molten metal storage
It is indoor；And in step S4, the molten metal poured into mold, molten metal volume be equal to casting mold cavity volume and feeding volume it
With, wherein feeding volume be total molten metal volume 6-8%；
S5 after casting complete, carries out the molten metal that ear on wheel hub is formed in the molten metal and casting mold cavity being located in running channel fast
Quickly cooling is but；Gas pressurization system is opened simultaneously, pressurizes to the indoor molten metal of molten metal storage is stored in, makes the metal
Liquid stores indoor molten metal and first carries out abundant feeding to ear on wheel hub under high pressure；Then successively cold to wheel hub other parts again
But it solidifies；
S6 after the completion of wheel hub solidifies completely, stops pressurization, and molten metal is discharged and stores indoor gas；
S7, die sinking carry out demoulding to the wheel hub of cast molding, remove the wheel hub of cast molding.
2. the wheel hub casting method that one kind according to claim 1 can reinforce ear intensity on wheel hub, which is characterized in that S5
In, successively wheel hub other parts cooled and solidified is specifically included: successively cold to the wheel rim of wheel hub, spoke, wheel disc and wheel disk center
But.
3. the wheel hub casting method that one kind according to claim 1 can reinforce ear intensity on wheel hub, which is characterized in that
In step S5, the mode that indoor molten metal pressurizes is stored as segmented pressurization to molten metal is stored in.
4. the wheel hub casting method that one kind according to claim 1 can reinforce ear intensity on wheel hub, which is characterized in that
In step S5, indoor six sections of pressurizations of molten metal progress are stored to molten metal is stored in, wherein
First segment, in the period of 1~3S, moulding pressure is 0.5~0.8KGF/cm2；
Second segment, in the period of 3~10S, moulding pressure is 0.8~2KGF/cm2；
Third section, in the period of 10~15S, moulding pressure is 2~6KGF/cm2；
4th section, in the period of 15~50S, moulding pressure is 6~3KGF/cm2；
5th section, in the period of 50~150S, moulding pressure is 3~2KGF/cm2；
6th section, in the period of 150~210S, moulding pressure is 2~1.5KGF/cm2。
5. the wheel hub casting method that one kind according to claim 1 can reinforce ear intensity on wheel hub, which is characterized in that
In step S5, indoor six sections of pressurizations of molten metal progress are stored to molten metal is stored in, wherein
First segment, moulding pressure are 0.5~0.8KGF/cm2Between arbitrary value, when pressurization a length of 2~5S；
Second segment, moulding pressure are 0.8~2KGF/cm2Between arbitrary value, when pressurization a length of 6~9S；
Third section, moulding pressure are 2~6KGF/cm2Between arbitrary value, when pressurization a length of 4~7S；
4th section, moulding pressure is 3~6KGF/cm2Between arbitrary value, when pressurization a length of 30~40S；
5th section, moulding pressure is 2~3KGF/cm2Between arbitrary value, when pressurization a length of 90~115S；
6th section, moulding pressure is 1.5~2KGF/cm2Between arbitrary value, pressurize a length of 55~70S.
6. one kind according to any one of claim 1 to 5 can reinforce the wheel hub casting method of ear intensity on wheel hub,
It is characterized in that,
In S5, pressurizeed by gas pressurization system to the indoor molten metal of molten metal storage is stored in, pressure medium is dry
Dry compressed air.
7. one kind according to any one of claim 1 to 5 can reinforce the wheel hub casting method of ear intensity on wheel hub,
It is characterized in that,
The molten metal is molten aluminum, and the temperature of molten aluminum is 700~720 DEG C, and the density of the molten aluminum is 2.6~2.7g/ ㎝3。
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