CN107309413A - A kind of low-pressure casting process of the large scale negative bias away from aluminium alloy wheel hub - Google Patents
A kind of low-pressure casting process of the large scale negative bias away from aluminium alloy wheel hub Download PDFInfo
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- CN107309413A CN107309413A CN201710700912.3A CN201710700912A CN107309413A CN 107309413 A CN107309413 A CN 107309413A CN 201710700912 A CN201710700912 A CN 201710700912A CN 107309413 A CN107309413 A CN 107309413A
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- aluminium
- wheel hub
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- pressure casting
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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
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a kind of low-pressure casting process of the large scale negative bias away from aluminium alloy wheel hub, belong to wheel hub manufacturing technology field, including：Aluminium aqueous fusion is refined；Aluminium water degassing is refined；Casting mould is heated and low pressure casting；Wherein：Instant silicon is added during the refining of aluminium aqueous fusion, the mass percent of silicone content is reached 7.5 8.0%；Aluminium water degassing refining process control aluminium water density reaches 2.65g/cm3More than;Casting mould heating process control side mould temperature is at 450 480 DEG C；In low pressure casting process, 700 720 DEG C of pouring temperature, rise the 0.030MPa of hydraulic coupling 0.025, rise the 10s of liquid time 8, the MPa of mold filling pressure 0.04 0.05, the 25s of filling time 20, the MPa of boost pressure 0.08 0.10, the 10s of pressurization time 8, the 600s of dwell time 400, pressurize terminate rear pressure release solidification and treat its cooling and demolding.The beneficial effects of the present invention are：Reduce product and owe casting defect and cold spot defect, easy molding and the demoulding, reduce and pull deformation and the overproof defect of dynamic balancing, reduce the generation of wheel rim shrinkage cavity defect.
Description
Technical field
The present invention relates to casting technique, more particularly to a kind of low-pressure casting process of the large scale negative bias away from aluminium alloy wheel hub,
Belong to wheel hub manufacturing technology field.
Background technology
Current aluminium alloy wheel hub substitutes conventional steel wheel hub, the main flow as automotive hub substantially.Automotive hub is inclined
Away from, i.e. Hub mounting surface to the distance of wheel hub geometric center lines, have positive offset distance wheel hub, zero offset distance wheel hub and negative bias away from wheel hub it
Point.And negative bias away from aluminium alloy wheel hub relative to general positive offset distance aluminium alloy wheel hub because with advantages below：
1st, tire and contact area of ground are added, car is improved and grabs ground stability；
2nd, the lateral support ability of high-performance tire can be preferably played, rolling condition of the offroad vehicle in turning is overcome；
3rd, grade climbing performance during vehicle traveling is improved；
4th, wheel evagination, it is handsome in appearance, it is personalized strong.
Therefore, negative bias is welcome by some high-end customers and cross-country fan very much away from aluminium alloy wheel hub.But it is negative in large scale
In the foundry production of offset distance aluminium alloy wheel hub, because wheel rim is deeper, low pressure casting difficulty is larger, and yield rate is relatively low, so valency
Lattice are also higher.
When producing large scale negative bias away from aluminium alloy wheel hub of vehicle with conventional low voltage casting technique, defective products is more, main table
It is now following defect：
1st, because wheel rim is deeper, rim base, which can be produced, owes casting defect；
2nd, difficulty is stripped, it is yielding；
3rd, the cold spot of wheel rim is more；
4th, there is shrinkage cavity at inner rim portion position；
5th, machine adds rear dynamic balancing bad.
To sum up, conventional low-pressure casting process be difficult in adapt to manufacture of the large scale negative bias away from aluminium alloy wheel hub of vehicle, it is necessary to
The new casting technique of exploitation overcomes conventional low voltage casting technique to manufacture quality of the large scale negative bias away from aluminium alloy wheel hub of vehicle product
Defect, yield rate is improved with this.
The content of the invention
The defect existed for prior art, it is an object of the invention to provide a kind of large scale negative bias away from aluminium alloy wheel hub
Low-pressure casting process, described casting technique includes：
Aluminium aqueous fusion is refined；
Aluminium water degassing is refined；
Casting mould is heated；
Low pressure casting；Wherein：
Instant silicon is added during described aluminium aqueous fusion refining, the mass percent of silicone content is reached 7.5-8.0%；
Described aluminium water degassing refining process control aluminium water density reaches 2.65g/cm3More than;
Described casting mould heating process control side mould temperature is at 450-480 DEG C；
In described low pressure casting process, 700-720 DEG C of pouring temperature rises hydraulic coupling 0.025-0.030MPa, rises liquid time 8-
10s, mold filling pressure 0.04-0.05 MPa, filling time 20-25s, boost pressure 0.08-0.10 MPa, pressurization time 8-10s,
Dwell time 400-600s, pressurize terminates rear pressure release solidification and treats its cooling and demolding.
Preferably, casting technique disclosed by the invention is especially suitable for carrying out aluminium aqueous fusion refining using A356.2 aluminium alloys.
Preferably, it is 22-26 cun, negative bias away from for -44- that casting technique disclosed by the invention, which is especially suitable for casting appearance and size,
0mm wheel hub.
Preferably, casting technique disclosed by the invention removes other gas in aluminium water degassing by the way of nitrogen is passed through
Body.
The beneficial effects of the present invention are：
1st, by increasing silicone content in aluminium water, hydrogen content is reduced, the mobility of aluminium water is improved, product is reduced and owes casting defect；
2nd, by controlling mould temperature in side in casting process, the cold spot defect of product is reduced, change is pulled in easy molding and the demoulding, reduction
Shape and the overproof defect of dynamic balancing；
3rd, the generation of wheel rim shrinkage cavity defect is reduced.
Embodiment
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the present invention is now with reference to showing
Go out embodiments of the invention to be described more fully hereinafter.However, the present invention can with many multi-forms embody and not
Specific embodiment set forth herein should be construed as limited to.On the contrary, these embodiments are supplied to those skilled in the art to manage
Solve technical scheme.
Unless otherwise defined, term used herein above（Include scientific and technical terminology）It should be construed to have as belonging to the present invention
The identical meaning that those skilled in the art are commonly understood by.It will also be understood that term used herein above should be explained
For with the meaning consistent with their meanings in the content of this specification and correlation technique, and should not be to idealize
Or excessive form is explained, unless expressly so limited here.
Embodiment 1：22 cun of appearance and size, offset distance -24mm casting aluminium alloy wheel hub technique
First, A356.2 aluminum alloy materials are fused into aluminium liquid, instant silicon is added in aluminium liquid, make the mass percent of silicone content
Reach 7.5%；
Secondly, nitrogen is passed through in aluminium liquid and removes other gases, aluminium liquid density is reached 2.65g/cm3；
Again, grilled mold is heated to low pressure casting die, side mould temperature is reached 450 DEG C；
Finally, aluminium liquid is added in low pressure casting machine holding furnace, is heated to 700 DEG C of insulations, and it is 0.025 to adjust liter hydraulic coupling
MPa, the liter liquid time is 8s, is forced into afterwards after 0.04 MPa, 20s and is full of mold cavity, then is pressurized to 0.08 MPa, during supercharging
Between be 8s, pressure release is stripped after pressurize 400s, obtains aluminum alloy hub cast.
Embodiment 2：26 cun of appearance and size, offset distance -44mm casting aluminium alloy wheel hub technique
First, A356.2 aluminum alloy materials are fused into aluminium liquid, instant silicon is added in aluminium liquid, make the mass percent of silicone content
Reach 8.0%；
Secondly, nitrogen is passed through in aluminium liquid and removes other gases, aluminium liquid density is reached 2.67g/cm3；
Again, grilled mold is heated to low pressure casting die, side mould temperature is reached 480 DEG C；
Finally, aluminium liquid is added in low pressure casting machine holding furnace, is heated to 720 DEG C of insulations, and it is 0.03 to adjust liter hydraulic coupling
MPa, the liter liquid time is 10s, is forced into afterwards after 0.05 MPa, 25s and is full of mold cavity, then is pressurized to 0.1 MPa, during supercharging
Between be 10s, pressure release is stripped after pressurize 600s, obtains aluminum alloy hub cast.
Embodiment 3：24 cun of appearance and size, offset distance -24mm casting aluminium alloy wheel hub technique
First, A356.2 aluminum alloy materials are fused into aluminium liquid, instant silicon is added in aluminium liquid, make the mass percent of silicone content
Reach 8.0%；
Secondly, nitrogen is passed through in aluminium liquid and removes other gases, aluminium liquid density is reached 2.65g/cm3；
Again, grilled mold is heated to low pressure casting die, side mould temperature is reached 460 DEG C；
Finally, aluminium liquid is added in low pressure casting machine holding furnace, is heated to 710 DEG C of insulations, and it is 0.03 to adjust liter hydraulic coupling
MPa, the liter liquid time is 10s, is forced into afterwards after 0.05 MPa, 25s and is full of mold cavity, then is pressurized to 0.1 MPa, during supercharging
Between be 10s, pressure release is stripped after pressurize 550s, obtains aluminum alloy hub cast.
Embodiment 4：22 cun of appearance and size, offset distance -20mm casting aluminium alloy wheel hub technique
First, A356.2 aluminum alloy materials are fused into aluminium liquid, instant silicon is added in aluminium liquid, make the mass percent of silicone content
Reach 7.0%；
Secondly, nitrogen is passed through in aluminium liquid and removes other gases, aluminium liquid density is reached 2.63g/cm3；
Again, grilled mold is heated to low pressure casting die, side mould temperature is reached 450 DEG C；
Finally, aluminium liquid is added in low pressure casting machine holding furnace, is heated to 710 DEG C of insulations, and adjust a liter hydraulic coupling and be
0.025MPa, the liter liquid time is 9s, is forced into afterwards after 0.04 MPa, 20s and is full of mold cavity, then is pressurized to 0.08 MPa,
Pressurization time is the pressure release demoulding after 8s, pressurize 500s, obtains aluminum alloy hub cast.
Embodiment 5：24 cun of appearance and size, offset distance -44mm casting aluminium alloy wheel hub technique
First, A356.2 aluminum alloy materials are fused into aluminium liquid, instant silicon is added in aluminium liquid, make the mass percent of silicone content
Reach 8.0%；
Secondly, nitrogen is passed through in aluminium liquid and removes other gases, aluminium liquid density is reached 2.65g/cm3；
Again, grilled mold is heated to low pressure casting die, side mould temperature is reached 480 DEG C；
Finally, aluminium liquid is added in low pressure casting machine holding furnace, is heated to 720 DEG C of insulations, and it is 0.03 to adjust liter hydraulic coupling
MPa, the liter liquid time is 10s, is forced into afterwards after 0.05 MPa, 25s and is full of mold cavity, then is pressurized to 0.1 MPa, during supercharging
Between be 10s, pressure release is stripped after pressurize 600s, obtains aluminum alloy hub cast.
Embodiment 6：26 cun of appearance and size, offset distance -30mm casting aluminium alloy wheel hub technique
First, A356.2 aluminum alloy materials are fused into aluminium liquid, instant silicon is added in aluminium liquid, make the mass percent of silicone content
Reach 7.8%；
Secondly, nitrogen is passed through in aluminium liquid and removes other gases, aluminium liquid density is reached 2.65g/cm3；
Again, grilled mold is heated to low pressure casting die, side mould temperature is reached 450 DEG C；
Finally, aluminium liquid is added in low pressure casting machine holding furnace, is heated to 700 DEG C of insulations, and it is 0.03 to adjust liter hydraulic coupling
MPa, the liter liquid time is 10s, is forced into afterwards after 0.05 MPa, 25s and is full of mold cavity, then is pressurized to 0.1 MPa, during supercharging
Between be 10s, pressure release is stripped after pressurize 600s, obtains aluminum alloy hub cast.
Found by batch Foundry Production, casting technique disclosed by the invention is very little, negative in batch production appearance and size 22-26
During offset distance -44-0mm aluminium alloy wheel hub, product qualification rate reaches more than 96%, can effectively overcome wheel hub bottom to owe casting, the demoulding and be stranded
The problems such as difficulty or ease modification, the cold spot of wheel rim are more, there is shrinkage cavity at inner rim portion position, dynamic balancing is bad after machining.
Although the present invention has been described with reference to specific aspect, feature and the exemplary embodiment of the present invention herein, should
When understanding, therefore purposes of the invention is not restricted, but extend and cover numerous other changes, modification with
And alternate embodiment, as will be given those skilled in the art in the invention are implied based on disclosure herein.Correspondingly, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (4)
1. a kind of low-pressure casting process of the large scale negative bias away from aluminium alloy wheel hub, including：
Aluminium aqueous fusion is refined；
Aluminium water degassing is refined；
Casting mould is heated；
Low pressure casting；It is characterized in that：
Instant silicon is added during described aluminium aqueous fusion refining, the mass percent of silicone content is reached 7.5-8.0%；
Described aluminium water degassing refining process control aluminium water density reaches 2.65g/cm3More than；
Described casting mould heating process control side mould temperature is at 450-480 DEG C；
In described low pressure casting process, 700-720 DEG C of pouring temperature rises hydraulic coupling 0.025-0.030MPa, rises liquid time 8-
10s, mold filling pressure 0.04-0.05 MPa, filling time 20-25s, boost pressure 0.08-0.10 MPa, pressurization time 8-10s,
Dwell time 400-600s, pressurize terminates rear pressure release solidification and treats its cooling and demolding.
2. low-pressure casting process of the large scale negative bias away from aluminium alloy wheel hub according to claim 1, it is characterised in that：It is described
Aluminium water be A356.2 aluminium alloy smeltings.
3. low-pressure casting process of the large scale negative bias away from aluminium alloy wheel hub according to claim 1, it is characterised in that：It is described
Aluminium water degassing refining process in be passed through nitrogen.
4. low-pressure casting process of the large scale negative bias away from aluminium alloy wheel hub according to any one of claim 1, its feature
It is：It is 22-26 cun, negative bias away from the wheel hub for -44-0mm that described casting technique, which is used to manufacturing appearance and size,.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710700912.3A CN107309413A (en) | 2017-08-16 | 2017-08-16 | A kind of low-pressure casting process of the large scale negative bias away from aluminium alloy wheel hub |
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| CN201710700912.3A CN107309413A (en) | 2017-08-16 | 2017-08-16 | A kind of low-pressure casting process of the large scale negative bias away from aluminium alloy wheel hub |
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Cited By (3)
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|---|---|---|---|---|
| CN108624769A (en) * | 2018-03-27 | 2018-10-09 | 大亚车轮制造有限公司 | A kind of casting technique of narrower spoke aluminium alloy wheel hub |
| CN108994279A (en) * | 2018-07-18 | 2018-12-14 | 大亚车轮制造有限公司 | A kind of low-pressure casting process of bus aluminium alloy wheel hub of vehicle |
| CN113843404A (en) * | 2021-10-22 | 2021-12-28 | 台山市天丞汽车配件有限公司 | Casting method of hub |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108624769A (en) * | 2018-03-27 | 2018-10-09 | 大亚车轮制造有限公司 | A kind of casting technique of narrower spoke aluminium alloy wheel hub |
| CN108994279A (en) * | 2018-07-18 | 2018-12-14 | 大亚车轮制造有限公司 | A kind of low-pressure casting process of bus aluminium alloy wheel hub of vehicle |
| CN113843404A (en) * | 2021-10-22 | 2021-12-28 | 台山市天丞汽车配件有限公司 | Casting method of hub |
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Application publication date: 20171103 |