CN109894599A - A kind of New Low Voltage casting technique - Google Patents
A kind of New Low Voltage casting technique Download PDFInfo
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- CN109894599A CN109894599A CN201910159863.6A CN201910159863A CN109894599A CN 109894599 A CN109894599 A CN 109894599A CN 201910159863 A CN201910159863 A CN 201910159863A CN 109894599 A CN109894599 A CN 109894599A
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Abstract
The present invention relates to aluminium alloy casting fields, more particularly to a kind of casting technique of batch production aluminium alloy wheel hub new and effective, energy saving, at low cost.Casting filling includes rising the liquid stage, filling type stage, feeding stage, packing stage and pressure release cooling stage；For novel casting technique filling method after first time packing stage, setting one rises the initial pressure basic value in liquid stage；The initial pressure basic value, is numerically equal to previous furnace pressure basic value and casting spends the sum of the offset of molten aluminum every time.The novel casting technique filling method can shorten filling time, improve production efficiency；Reduce the slagging of stalk inner wall, Improving The Quality of Products；Cooling air dosage in type is filled in reduction, energy saving；Extend stalk, heating rod and thermocouple pillar service life, reduces cost.
Description
Technical field
The present invention relates to high-end intelligence manufacture and new material technology fields, relate in particular to wheel hub Manufacturing Automation Technology
Field, more particularly to a kind of casting technique filling method of batch production aluminium alloy wheel hub new and effective, energy saving, at low cost.
Background technique
Problem of environmental pollution increasingly becomes focus concerned by people, for the requirement day of automotive light weight technology, reduction oil consumption
Beneficial urgent, application of the aluminium alloy wheel hub on automobile is just more and more popular.The aluminium that quality is lighter, good appearance, thermal diffusivity are good
Alloy wheel hub has been increasingly becoming the mating first choice of the major main engine plants of present automobile industry.Aluminium alloy wheel hub can by casting,
The production of the kinds of processes such as forging, punching press and spinning.Currently, low pressure casting is the most important production method of aluminium alloy wheel hub, low pressure
Casting becomes always casting aluminium alloy wheel hub because its cast structure is fine and close, defect is few and the advantages such as molten aluminum recovery utilization rate height
The first choice of industry.In " strategic emerging industries major products and service guidance list ", aluminium alloy compression casting material product is made
For novel metal functional material, it is included in new material industry, becomes the strategic emerging industries of country.
But with the increasingly saturation in aluminium alloy wheel hub market, how while guaranteeing aluminium alloy wheel hub quality, into one
Step improves production efficiency and reduces production cost, is the major issue that each main engine plants all suffer from.
Summary of the invention
In order to solve the above technical problems, for existing traditional aluminium alloy wheel hub low-pressure casting process filling method, author
Work on the spot experience is cast in conjunction with itself many years low-pressure machine, proposes a kind of New Low Voltage casting technique filling method, into one
Step improves the production efficiency of Low Pressure Die Casting of Aluminum Wheel Hub technique, and further reduces the production cost.
The complete technical solution of the present invention includes:
A kind of New Low Voltage casting technique, including multiple production cycles, each production cycle include at least the liquid stage that rises, fill type
Stage, feeding stage, packing stage and pressure release cooling stage；Multiple production cycles include at least the first production cycle and
Second production cycle, which is characterized in that
First production cycle includes rising the liquid stage, filling type stage, feeding stage, packing stage and pressure release cooling stage；Institute
Stating liter liquid stage using hydraulic coupling is risen rises molten aluminum along stalk, described to fill the type stage and make molten aluminum full of casting using mold filling pressure
Type, the feeding stage make molten aluminum feeding under stress using feeding pressure, and the packing stage makes molten aluminum using dwell pressure
It solidifies under stress, the pressure release cooling stage declines pressure value, but keeps the initial pressure basis in certain liter liquid stage
Value, i.e., in pressure release cooling stage, furnace pressure keeps certain pressure basic value.
Second production cycle includes rising the liquid stage, filling type stage, feeding stage, packing stage and pressure release cooling stage；Institute
State liter liquid stage boosts on the initial pressure basal values that the first production cycle pressure release cooling stage uses, and reaches a liter liquid
Pressure rises molten aluminum along stalk；The pressure release cooling stage declines pressure value, but is maintained at second pressure basic value.
Preferably, further include third production circulation, third production circulation include rise a liquid stage, fill the type stage, the feeding stage,
Packing stage and pressure release cooling stage；The second pressure base that described liter of liquid stage uses in the second production cycle pressure release cooling stage
It boosts on the basis of plinth value, and reaches a liter hydraulic coupling, increase along stalk molten aluminum；The pressure release cooling stage makes under pressure value
Drop, but it is maintained at third pressure-based value.
It preferably, further include n-th production cycle, n-th production cycle includes rising the liquid stage, filling type stage, feeding rank
Section, packing stage and pressure release cooling stage；The N-1 that described liter of liquid stage uses in N-1 production cycle pressure release cooling stage
It boosts on the basis of pressure-based value, and reaches a liter hydraulic coupling, increase along stalk molten aluminum；The pressure release cooling stage makes pressure
Value decline, but it is maintained at N pressure-based value.
Preferably, the N is positive integer, and N > 3.
Preferably, the N pressure-based value=N-1 pressure-based value+ΔOffset；Wherein
In formula, ΔOffsetFor pressure supplement, unit mbar；σ is the cubical contraction of molten aluminum solidification；G is gravity acceleration
Degree；M is the wheel mass of certain wheel-type, unit Kg；D is the diameter of molten aluminum upper surface in holding furnace, unit m.
Preferably, the initial pressure basic value is set according to different wheel-type, the volume of holding furnace.
The present invention compared with the existing technology the advantages of are as follows:
(1) novel casting technique filling method of the present invention, second and liter liquid stage later are from the first of setting
Beginning pressure value starts a liter liquid, the molten aluminum liquid level in stalk being connected at the beginning of liter liquid starts with mold and the molten aluminum in holding furnace
There are certain differences in height for liquid level, can so reduce the time used in liter liquid stage.
(2) novel casting technique filling method of the present invention shortens production week by reducing filling time
Phase, and then the production efficiency of entire producing line is improved, there is important meaning for producing the process optimization of main engine plants of wheel hub in enormous quantities
Justice.
(3) novel casting technique filling method of the present invention is kept by a liter setting for liquid staged pressure basic value
Always molten aluminum is full of among mold and holding furnace inside the stalk at position, the slagging of this section of stalk tube wall can be effectively prevent,
Casting product quality can be promoted, stalk service life is extended, stalk is reduced and replaces number, improve production efficiency, reduce life
Produce cost.
(4) novel casting technique filling method of the present invention, by maintaining the pressure-based value in liter liquid stage always,
The furnace gas for having been heated to high temperature in holding furnace can be retained in holding furnace, reduce the dosage of cold air when filling type again,
The heat supply burden for reducing holding furnace heating rod, plays apparent energy-saving effect；Meanwhile the furnace gas temperature difference is small in holding furnace, extends
The service life of heating rod, thermocouple pillar etc..
Detailed description of the invention
Fig. 1 is certain wheel-type low-pressure casting process furnace pressure control curve graph；
Fig. 2 is to rise liquid initial stage molten aluminum liquid level schematic diagram.
In Fig. 1, each point coordinate are as follows: a (246,100), b (251,180+ Δ), c (269,320+ Δ), d (277,850+
Δ), e (437,850+ Δ), f (437,100+ Δ).
In Fig. 2,1- mold, 2- stalk, 3- holding furnace, 4- molten aluminum, 5- stalk flange, 6- intermediate sleeve component.
Specific embodiment
With embodiment embodiments of the present invention are described in further detail with reference to the accompanying drawing.Following embodiment
For illustrating the present invention, but cannot be used to limit the scope of the invention.
The New Low Voltage casting technique filling method, does in conjunction with a certain wheel-type and low-pressure die casting plant and retouches in detail below
It states.As shown in Figure 1, including rising the liquid stage, filling type stage, feeding stage, packing stage and pressure release cooling stage.
The novel casting technique filling method for a certain wheel-type, therein liter of liquid stage, time total 10s, first
It is secondary to rise hydraulic force value from 0mbar to 180mbar；For the first time fill the type stage, time total 18s, mold filling pressure value from 180mbar to
320mbar；In feeding stage first time, time total 8s, feeding pressure value is from 320mbar to 850mbar；First time packing stage,
Time total 160s, pressure value 850mbar.
The novel casting technique filling method for a certain wheel-type, it is characterised in that first time pressure release cooling stage,
Pressure value is down to 100mbar from 850mbar, and 100mbar is the pressure-based value in second liter of liquid stage, at this time due to the pressure
Presence, the molten aluminum liquid level in stalk is higher than the molten aluminum liquid level in holding furnace, as shown in Figure 2.Such second liter of liquid rank
The time of section, 5s can be foreshortened to.It loops back and forth like this, the pressure-based value that third time rises the liquid stage is (100+ ΔOffset) mbar,
In the present invention, the ΔOffsetDesign formula are as follows:
In formula, ΔOffsetFor pressure supplement, unit mbar；σ is the cubical contraction of molten aluminum solidification；G is gravity acceleration
Degree；M is the wheel mass of certain wheel-type, unit Kg；D is the diameter of molten aluminum upper surface in holding furnace, unit m.
4th time the pressure-based value for rising the liquid stage is (100+2 ΔOffset) mbar, it is up to holding furnace adds molten aluminum again
Only.For different wheel-type, molten aluminum used and ΔOffsetIt can change.
Note: pressure value described above is relative pressure.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention
Technical spirit any simple modification to the above embodiments, change and equivalent structural changes, still fall within skill of the present invention
In the protection scope of art scheme.
Claims (6)
1. a kind of New Low Voltage casting technique, including multiple production cycles, each production cycle includes at least the liquid stage that rises, fills type rank
Section, feeding stage, packing stage and pressure release cooling stage；Multiple production cycles include at least the first production cycle and the
Two production cycles, which is characterized in that pressure release cooling stage after a upper production cycle keeps certain pressure-based
It is worth, and starts the liter liquid stage of next production cycle on the basis of pressure-based value；It specifically includes:
First production cycle includes rising the liquid stage, filling type stage, feeding stage, packing stage and pressure release cooling stage；The liter
The liquid stage using rise hydraulic coupling make molten metal along stalk rise, it is described fill the type stage using mold filling pressure make molten metal full of casting
Type, the feeding stage make molten metal feeding under stress using feeding pressure, and the packing stage makes gold using dwell pressure
Belong to liquid to solidify under stress, the pressure release cooling stage declines pressure value, but keeps the initial pressure in certain liter liquid stage
Basic value, i.e., in pressure release cooling stage, furnace pressure keeps certain pressure basic value.
Second production cycle includes rising the liquid stage, filling type stage, feeding stage, packing stage and pressure release cooling stage；The liter
The liquid stage boosts on the initial pressure basal values that the first production cycle pressure release cooling stage uses, and it is hydraulic to reach liter
Power rises molten metal along stalk；The pressure release cooling stage declines pressure value, but is maintained at second pressure basic value.
2. a kind of New Low Voltage casting technique according to claim 1, which is characterized in that it further include third production circulation,
Third production circulation includes rising the liquid stage, filling type stage, feeding stage, packing stage and pressure release cooling stage；Described liter of liquid rank
Section is boosted on the second pressure basal values that the second production cycle pressure release cooling stage uses, and reaches a liter hydraulic coupling, is made
Molten metal rises along stalk；The pressure release cooling stage declines pressure value, but is maintained at third pressure-based value.
3. a kind of New Low Voltage casting technique according to claim 1 to 2, which is characterized in that further include that n-th production follows
Ring, n-th production cycle include rising the liquid stage, filling type stage, feeding stage, packing stage and pressure release cooling stage；The liter
The liquid stage boosts on the basis of the N-1 pressure-based value that N-1 production cycle pressure release cooling stage uses, and it is hydraulic to reach liter
Power rises molten metal along stalk；The pressure release cooling stage declines pressure value, but is maintained at N pressure-based value.
4. a kind of New Low Voltage casting technique according to claim 1 to 3, which is characterized in that the N is positive integer, and
N>3。
5. a kind of New Low Voltage casting technique described in -4 according to claim 1, which is characterized in that the initial pressure basic value
According to different wheel-type, the volume of holding furnace and stalk is set.
6. a kind of New Low Voltage casting technique described in -5 according to claim 1, which is characterized in that the N pressure-based value
=the N-1 pressure-based value+ΔOffset；Wherein
In formula, ΔOffsetFor pressure supplement, unit mbar；σ is the cubical contraction of molten metal solidification；G is gravity acceleration
Degree；M is the wheel mass of certain wheel-type, unit Kg；D is the diameter of molten aluminum upper surface in holding furnace, unit m.
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| CN201910159863.6A CN109894599A (en) | 2019-03-04 | 2019-03-04 | A kind of New Low Voltage casting technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110181024A (en) * | 2019-07-09 | 2019-08-30 | 佛山市南海奔达模具有限公司 | Wheel hub low-pressure casting process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4143687A (en) * | 1976-10-18 | 1979-03-13 | Pont-A-Mousson S.A. | Process and device for controlling a vessel for pouring liquid under low pressure in a repeated manner |
| JPS5850166A (en) * | 1981-09-18 | 1983-03-24 | Nissin Kogyo Kk | Low pressure casting method by holding of residual pressure |
| CN1569363A (en) * | 2003-07-21 | 2005-01-26 | 陆仁志 | Liquid surface suspension pressurization control method for low-pressure casting machine |
| CN1754637A (en) * | 2004-09-27 | 2006-04-05 | 刘文辉 | Energy-saving low-voltage casting equipment |
| CN101585079A (en) * | 2008-05-21 | 2009-11-25 | 沈阳铸造研究所 | Low-pressure casting filling method and low-pressure casing filling equipment used by same |
| CN102000803A (en) * | 2010-12-03 | 2011-04-06 | 苏州中门子科技有限公司 | Low-pressure casting device in copper-aluminum composite row casting system |
| CN103736968A (en) * | 2013-11-13 | 2014-04-23 | 江苏凯特汽车部件有限公司 | Low-pressure casting device for aluminum alloy wheels of automobile |
-
2019
- 2019-03-04 CN CN201910159863.6A patent/CN109894599A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4143687A (en) * | 1976-10-18 | 1979-03-13 | Pont-A-Mousson S.A. | Process and device for controlling a vessel for pouring liquid under low pressure in a repeated manner |
| JPS5850166A (en) * | 1981-09-18 | 1983-03-24 | Nissin Kogyo Kk | Low pressure casting method by holding of residual pressure |
| CN1569363A (en) * | 2003-07-21 | 2005-01-26 | 陆仁志 | Liquid surface suspension pressurization control method for low-pressure casting machine |
| CN1754637A (en) * | 2004-09-27 | 2006-04-05 | 刘文辉 | Energy-saving low-voltage casting equipment |
| CN101585079A (en) * | 2008-05-21 | 2009-11-25 | 沈阳铸造研究所 | Low-pressure casting filling method and low-pressure casing filling equipment used by same |
| CN102000803A (en) * | 2010-12-03 | 2011-04-06 | 苏州中门子科技有限公司 | Low-pressure casting device in copper-aluminum composite row casting system |
| CN103736968A (en) * | 2013-11-13 | 2014-04-23 | 江苏凯特汽车部件有限公司 | Low-pressure casting device for aluminum alloy wheels of automobile |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110181024A (en) * | 2019-07-09 | 2019-08-30 | 佛山市南海奔达模具有限公司 | Wheel hub low-pressure casting process |
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Application publication date: 20190618 |