CN107377939A - A kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method - Google Patents
A kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method Download PDFInfo
- Publication number
- CN107377939A CN107377939A CN201710620140.2A CN201710620140A CN107377939A CN 107377939 A CN107377939 A CN 107377939A CN 201710620140 A CN201710620140 A CN 201710620140A CN 107377939 A CN107377939 A CN 107377939A
- Authority
- CN
- China
- Prior art keywords
- low pressure
- wheel hub
- mould
- die casting
- aluminum wheel
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
Abstract
The present invention provides a kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method, comprises the following steps：The research of mold filling pressure；Mould heat exchange is studied；The linguistic term of coat；Compared with prior art, the present invention has following beneficial effect：During there is the multiple physical field of complex-shaped surface mould to interact for this, the pressure controlling condition of type is filled in research, has key effect for control of product quality；Secondly an important factor for heat exchange of mould is effect product quality；Influence of the coat to casting property is also particularly significant, by studying above- mentioned information, further Low Pressure Die Casting of Aluminum Wheel Hub technique can be improved.
Description
Technical field
The present invention is a kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method, belongs to mechanical processing technique field.
Background technology
Aluminium alloy wheel hub relies on the advantages that its good appearance, specific strength are high, precision is high, safe, extensively should obtain
With.Low pressure casting has turned into the main technique of its production.Meanwhile in product development, multinomial virtual development skill is generally adopted
With, and develop to deeper Integration ofTechnology and the technique direction that becomes more meticulous, wherein, for die-castingmold filling and the essence of solidifying process
Really control, have become the bottleneck of control of product quality.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the present invention to provide a kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study
Method, to solve the problems mentioned in the above background technology.
To achieve these goals, the present invention is to realize by the following technical solutions：A kind of aluminium alloy wheel hub low pressure
Casting Process method, comprises the following steps：The research of mold filling pressure；
Mould heat exchange is studied；
The linguistic term of coat.
Further, the research of the mold filling pressure concretely comprises the following steps：Formulated by pressure with time changing curve
Low pressure casting pressure condition, and Improvement is carried out to it.
Further, what the mould heat exchange was studied concretely comprises the following steps：By the heat exchange number for calculating mould and aluminium liquid
Value determines cooling duct, intensity of cooling and cool time.
Further, the linguistic term of the coat concretely comprises the following steps：Effect to coating is studied and right
The composition of coating is studied.
Beneficial effects of the present invention：A kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method of the present invention, has at this
During the multiple physical field interaction of complex-shaped surface mould, the pressure controlling condition of type is filled in research, for control of product quality
With key effect；Secondly an important factor for heat exchange of mould is effect product quality；Influence of the coat to casting property
Also it is particularly significant, by studying above- mentioned information, further Low Pressure Die Casting of Aluminum Wheel Hub technique can be improved.
Brief description of the drawings
The detailed description made by reading with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is a kind of low pressure casting pressure time changing curve of Low Pressure Die Casting of Aluminum Wheel Hub technical study method of the present invention.
Embodiment
To be easy to understand the technical means, the inventive features, the objects and the advantages of the present invention, with reference to
Embodiment, the present invention is expanded on further.
The present invention provides a kind of technical scheme：A kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method, including following step
Suddenly：The research of mold filling pressure；
Mould heat exchange is studied；
The linguistic term of coat.
The research of mold filling pressure concretely comprises the following steps：Low pressure casting pressure bar is formulated by pressure and time changing curve
Part, and Improvement is carried out to it.
Low pressure casting pressure condition is formulated by pressure with time changing curve, sees Fig. 1, in a circulation
In, fill type (a-b), supercharging (b-c), pressurize (c-d), release stage, generally, control by a liter hydraulic coupling foundation, slow shot
Application time point ti and relevant pressure value Pi value formulates linear loading pressure curve.
(1) it is the liter liquid stage before a points
I.e. aluminium liquid is risen at cast gate from liquid storage chamber surface.P 1 depends on fluid reservoir liquid level to trumpet assembly height, for steady
Fixed wheel hub die-casting system, P 1 are fixed value.
(2) a-b is that slow shot fills the type stage
Fill type " preceding stream " and die cavity is entered by cast gate, then fill core wheel, spoke, wheel rim successively.In this process, P/ t
Change fatefully influence filling mould states, there is decisive role to product quality.
(3) b-c is pressurization stages
Supercharging is bigger, speed is faster, more advantageously forms the casting of densification.But limited by capacity of equipment and mould condition
System.Therefore, on the premise of this staged pressure condition occurs without big " overlap " and " runout " in casting, should as quickly as possible, for
Multiple wheel-type, this process typically change small, and parameter P 2 is also more fixed.
(4) c-d is packing stage
This phases-time length depends on the curdled appearance of casting, when feeding effect is no longer played in pressurization to casting solidification,
Pressurize can be terminated.The time length in this stage is mainly related with mold cavity volume, is typically also fixed value.
In production, mold filling pressure loading procedure regards linear as more, and higher pressure can be obtained for most wheel hubs
Casting rate.But for the wheel hub of some complex cavities, adjusting process in any case, die casting yield rate is all the time 70%
Below.From theory analysis, in the cavity filling process of a-b sections, the flowing of aluminum alloy melt is complex, " preceding stream " Free Surface
Change is more complicated, and cavity wall thickness changes greatly, if by a-b section pressure-loadeds, still using strict linear relationship, to keep certainly
By the continuous and steady change in face, and it is impossible to form stable flow field with temperature field.Therefore, study a-b with need to refining
Section mold filling pressure loading procedure.
Mould heat exchange research concretely comprises the following steps：Heat exchange numerical value by calculating mould and aluminium liquid determines that cooling is logical
Road, intensity of cooling and cool time.
The linguistic term of coat concretely comprises the following steps：Effect to coating is studied and the composition of coating is carried out
Research.
In foundry production, coat plays role that can not be indiscreet and negligent, and its major function is summarized as follows four：
Mould is protected, avoids being corroded by aluminium liquid.
Due to molten aluminum liquid have to mold materials should have corrosion function, nationality is sprayed at after die face formed by coat
Shallow layer, can be with the direct contact of barrier metal liquid and mould, to avoid die cavity from being washed away and corroded by aluminium liquid for a long time repeatedly
And expensive mould is damaged, extend the mold use life-span.
Casting is set to be easy to from mould.
Aluminium liquid enters die cavity along flow passage system is poured, due to the protection of coat in die face so that aluminium liquid is difficult to metal
Mould reacts, and avoids the generation of mold sticking.This casting contributed to after solidification leans on the lubricity that coating is provided, easily
Taken out from die cavity.
Control the directional solidification of aluminium liquid in die cavity.
In the occasion without coat, solidification crystal grain is by metal die side wall, grow up at past center, direction is vertical die face
And without growth precedence.This is readily formed crystalline structure staggeredly and group hinders the recruitment behavior for solidifying liquid aluminium liquid, causes
The generation of shrinkage cavity, influence the integrity of casting.It is cloudy by part due to being passed toward the heat of metal die face using the occasion of coat
Hinder, crystal grain-growth all has the order of size priority when aluminium liquid solidifies, and solidification direction is parallel to die wall, and feeding path becomes unobstructed
It is without hindrance, therefore possible casting contracting can be reduced.
The casting of excellent surface quality is provided.
The surface roughness of coating directly affects the face rugosity of aluminium alloy castings.The coat of all kinds, its surface are micro-
Structure is seen there is the quite poor opposite sex, this species diversity is in the difference in the basic kenel caused by smearing agent prescription difference a bit
Not, some are then the results caused by the gimmick of spraying operation and the difference of condition.So in order to needed for obtaining it is good table
The casting of face quality is same, and it is phase to select appropriate and reliable coat and control spraying person's industry condition and skillful smearing gimmick
When an important ring.
The composition of coating
The materials such as die cavity, mould pin, runner system and the peripheral facility of metal pattern are attached to, are referred to as metal pattern coat
（coating）.Its color has white, grey, scholar's yellow, red and black.Outward appearance is thick in the pasty state.Conclude its mainly into
Part, four big constituents can be about divided into, as described below：
Inserts.
Inserts is the basic constituent of coat.Between 650-800 DEG C being ranged approximately from due to the cast temperature of aluminium alloy,
Therefore filler need to possess enough heat resistances and thermo-chemical stability, possible chemical reaction is prevented, avoids low melting point from giving birth to
Into the characteristic such as resistance high temeperature chemistry variability.Inserts Main Ingredients and Appearance is ceramic fire resistant material, lubricity material and high heat conduction material institute group
Into having different formulas depending on species and the purposes of coat.Ceramic fire resistant material for example vermiculite, aluminum oxide, titanium oxide, calcium carbonate,
Silica, vitreous silica, zirconium powder, magnesia and iron oxide etc..Lubricant material is mainly saponite, talcum powder and mica etc..
High heat conduction material is based on graphite.Material listed above has duality concurrently a bit, such as graphite is in addition to having high conduction hot,
There is lubricant effect.
Binding agent.
The effect of binding agent is intended to the particle between inserts being incorporated in, and coat is had certain intensity, can
Effectively it is attached in metal die face, prevents coming off for coating.Binding agent composition is with waterglass, based on clay and Micro-pax.
Water.
Al-alloy metal mould coat is to be used as carrier using water mostly（carrier）, it is diluted with water mixing inserts and glues
After tying the materials such as agent, load in holding cup of spray gun, the coat mixed is driven with pneumatics, suitable can be sprayed in die face, when
So also it is coated on using hairbrush dipping coat in die face.
Various additives.
Except inserts, outside binding agent and water, a small amount of additive can be more or less added in coat.Such as in order to
Enough suspensions for maintaining the coat after being diluted with water, avoid the too fast Shen of the materials such as the larger inserts of density from entering spray gun bottom of a cup,
Influence each proportion of composing of coat after spraying is atomized.Most commercially available coat can all add suspending agent, and conventional having is swollen
Soil, clay and high territory etc..In addition, the additives such as some preservatives and interface characteristics dose can be also added because of different demands.
When acted on by studying matching somebody with somebody for coating, to adjust the gas permeability of mould, heat insulating ability, so as to optimize casting technique,
Reduce casting flaw.
As one embodiment of the present of invention：A kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method of the present invention,
During this has the multiple physical field interaction of complex-shaped surface mould, the pressure controlling condition of type is filled in research, for product quality
Control has key effect；Secondly an important factor for heat exchange of mould is effect product quality；Coat is to casting property
Influence is also particularly significant, by studying above- mentioned information, further Low Pressure Die Casting of Aluminum Wheel Hub technique can be improved.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above, for this area skill
For art personnel, it is clear that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and without departing substantially from the present invention spirit or
In the case of essential characteristic, the present invention can be realized in other specific forms.Which point therefore, no matter from the point of view of, all should incite somebody to action
Embodiment regards exemplary as, and be it is nonrestrictive, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that all changes fallen in the implication and scope of the equivalency of claim are included in the present invention
It is interior.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (4)
- A kind of 1. Low Pressure Die Casting of Aluminum Wheel Hub technical study method, it is characterised in that：Comprise the following steps：Mold filling pressure is ground Study carefully；Mould heat exchange is studied；The linguistic term of coat.
- A kind of 2. Low Pressure Die Casting of Aluminum Wheel Hub technical study method according to claim 1, it is characterised in that：It is described to fill The research of type pressure concretely comprises the following steps：Low pressure casting pressure condition is formulated by pressure and time changing curve, and to it Carry out Improvement.
- A kind of 3. Low Pressure Die Casting of Aluminum Wheel Hub technical study method according to claim 1, it is characterised in that：The mould Tool heat exchange research concretely comprises the following steps：Cooling duct, intensity of cooling are determined by the heat exchange numerical value for calculating mould and aluminium liquid And cool time.
- A kind of 4. Low Pressure Die Casting of Aluminum Wheel Hub technical study method according to claim 1, it is characterised in that：The painting The linguistic term of mould agent concretely comprises the following steps：Effect to coating is studied and the composition of coating is studied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710620140.2A CN107377939A (en) | 2017-07-26 | 2017-07-26 | A kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710620140.2A CN107377939A (en) | 2017-07-26 | 2017-07-26 | A kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107377939A true CN107377939A (en) | 2017-11-24 |
Family
ID=60341249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710620140.2A Pending CN107377939A (en) | 2017-07-26 | 2017-07-26 | A kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107377939A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111363958A (en) * | 2020-03-26 | 2020-07-03 | 安徽拓普勒汽车科技有限公司 | Novel aluminum alloy wheel hub |
| CN111394666A (en) * | 2018-06-20 | 2020-07-10 | 陈国荣 | Manufacturing method of motor shell of electric automobile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818398A (en) * | 2015-03-23 | 2015-08-05 | 芜湖黄燕实业有限公司 | Aluminum alloy for wheel hub and preparation method thereof, and aluminum alloy wheel hub |
| CN104999052A (en) * | 2015-08-14 | 2015-10-28 | 芜湖黄燕实业有限公司 | Low-pressure casting method of aluminum alloy hubs |
| CN106086546A (en) * | 2016-08-26 | 2016-11-09 | 山东金马汽车装备科技有限公司 | The low-pressure casting process of aluminium alloy wheel hub |
-
2017
- 2017-07-26 CN CN201710620140.2A patent/CN107377939A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818398A (en) * | 2015-03-23 | 2015-08-05 | 芜湖黄燕实业有限公司 | Aluminum alloy for wheel hub and preparation method thereof, and aluminum alloy wheel hub |
| CN104999052A (en) * | 2015-08-14 | 2015-10-28 | 芜湖黄燕实业有限公司 | Low-pressure casting method of aluminum alloy hubs |
| CN106086546A (en) * | 2016-08-26 | 2016-11-09 | 山东金马汽车装备科技有限公司 | The low-pressure casting process of aluminium alloy wheel hub |
Non-Patent Citations (1)
| Title |
|---|
| 黄少兵: "冷却介质对铝合金轮毂铸造工艺与使用性能的影响", 《工程科技II辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111394666A (en) * | 2018-06-20 | 2020-07-10 | 陈国荣 | Manufacturing method of motor shell of electric automobile |
| CN111363958A (en) * | 2020-03-26 | 2020-07-03 | 安徽拓普勒汽车科技有限公司 | Novel aluminum alloy wheel hub |
| CN111363958B (en) * | 2020-03-26 | 2022-05-31 | 安徽拓普勒汽车科技有限公司 | Aluminum alloy wheel hub |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108531803A (en) | A kind of casting method of spheroidal graphite cast-iron valve body | |
| KR100412071B1 (en) | Method for molding, method for die casting and die cast products | |
| CN104399891A (en) | Casting method combining investment precise shell-making process with vacuum suction molding technology | |
| CN105397027A (en) | Casting method of casting | |
| CN101554644B (en) | Lost foam casting process suitable for aluminum alloy materials | |
| EP1060817B1 (en) | Pressure die-casting process of magnesium alloys | |
| CN107377939A (en) | A kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method | |
| CN106238688B (en) | A kind of casting method of piston type casting | |
| HU208270B (en) | Lose-pattern, pressure precision casting method | |
| Yadav et al. | Effect of process parameters on mechanical properties of the investment castings produced by using expandable polystyrene pattern | |
| CN110396625A (en) | A kind of preparation method of antiwear heat resisting aluminium alloy | |
| CN105665657A (en) | Discrete casting method for preparing homogenized cast ingot | |
| Pacyniak | The effect of refractory coating permeability on the Lost Foam Process | |
| Pulivarti et al. | Effect of mould coatings and pouring temperature on the fluidity of different thin cross-sections of A206 alloy by sand casting | |
| JPH05501226A (en) | How to control heat extraction rate in casting | |
| US5325907A (en) | Metallic mold for casting vehicle wheel | |
| US20050126737A1 (en) | Process for casting a semi-solid metal alloy | |
| WO2009133602A1 (en) | Method for predicting shrinkage cavity of casting iron metal, and method for preventing the same | |
| CN105689647A (en) | Casting process for outlet water valve | |
| Srinivasan et al. | Tribological Studies of Shrinkage Defect and Effective Yield Upgrade of Grey Cast-Iron Castings | |
| CN107199314A (en) | A kind of 18KW video display light fixture front frame sand mould casting method | |
| CN110202121B (en) | Alloy casting method for obtaining fine secondary dendrite arm spacing by using double cooling conditions | |
| CN114406195B (en) | Method for producing elevator brake disc by vacuum sealing casting | |
| RU2367538C1 (en) | Coating for casting moulds at centrifugal casting of copper alloys | |
| CN112828241B (en) | Casting heating coating and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171124 |
|
| RJ01 | Rejection of invention patent application after publication |