CN106392033A - Local extrusion method used for high-pressure casting - Google Patents
Local extrusion method used for high-pressure casting Download PDFInfo
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- CN106392033A CN106392033A CN201610430677.8A CN201610430677A CN106392033A CN 106392033 A CN106392033 A CN 106392033A CN 201610430677 A CN201610430677 A CN 201610430677A CN 106392033 A CN106392033 A CN 106392033A
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- Prior art keywords
- extrusion
- oil cylinder
- pressure ram
- cylinder piston
- 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
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention provides a local extrusion method used for high-pressure casting. The method comprises the steps that a local extrusion device used for high-pressure casting is used for extruding the surface of a casting. The device is composed of an extrusion core sleeve (03), an extrusion rod (04), an extrusion oil cylinder (05) and an extrusion oil cylinder piston (06) and is characterized in that the extrusion oil cylinder (05) internally comprises the extrusion oil cylinder piston (06), the extrusion oil cylinder piston (06) is connected with the extrusion rod (04), the extrusion rod (04) is located in the extrusion core sleeve (03), and the extrusion core sleeve (03) and the extrusion oil cylinder (05) are fixed; the extrusion oil cylinder piston (06) is driven to drive the extrusion rod (04) to complete extrusion. The method has the beneficial effects that the extrusion stroke of the local extrusion process can be effectively ensured, meanwhile, the shrinkage defect of the large and thick portion of products is reduced, the production rejection rate is reduced, and the enterprise economic benefits are obviously improved.
Description
Technical field
The present invention relates to casting field, more particularly to a kind of local compression method for high-pressure casting.
Background technology
Mould is modern industry, and the particularly industry such as automobile, radio, aviation, instrument, article of everyday use is requisite
Technological equipment.At present, because die casting complex structure, wall unevenness are even, setting time is shorter, for product structure
In " thermal center " position, through frequently with method be high pressure-charging feeding, optimize pouring gate structure, strengthen cooling etc. method
To realize, but by adjusting process parameter, the feeding at remote cast gate to be often difficult to realize, porosity is difficult to meet day
The car load factory customer requirement of benefit lifting.
Content of the invention
For the technical requirements of above-mentioned aluminium alloy compression casting, the present invention proposes a kind of local compression side of high-pressure casting mould
Method.It can be used for reducing the shrinkage defect of product thermal center position, improves interiors of products quality, reduces porosity problems.
In one aspect of the invention, disclose a kind of local compression method for high-pressure casting it is characterised in that
Described method includes being extruded in cast(ing) surface using the local extrusion device for high-pressure casting；Described is used for
The local extrusion device of high-pressure casting is by extrusion pressing type core retainer plate (03), pressure ram (04), extrusion oil cylinder (05), extruding oil
Cylinder piston (06) formed it is characterised in that：Described extrusion oil cylinder (05) includes extrusion oil cylinder piston (06),
Described extrusion oil cylinder piston (06) is connected with pressure ram (04), and described pressure ram (04) is located at extrusion pressing type
In core retainer plate (03), extrusion pressing type core retainer plate (03) is fixing with extrusion oil cylinder (05)；Described is pressed through driving extruding oil
Cylinder piston (06) drives pressure ram (04) to complete.
In currently preferred aspect, described extrusion pressing type core retainer plate (03) includes on the direction towards foundry goods (01)
Cavity (12).
In currently preferred aspect, described extrusion oil cylinder piston (06) is big with the sectional area ratio of pressure ram (04)
In 10.
In currently preferred aspect, described extrusion oil cylinder piston (06) with the sectional area ratio of pressure ram (04) is
10-40.
In currently preferred aspect, described extrusion oil cylinder piston (06) with the sectional area ratio of pressure ram (04) is
12.
In currently preferred aspect, when extrusion oil cylinder piston (06) does not extrude, pressure ram front end (08) exceeds crowded
Gland end face (10) 4～10mm.
Between currently preferred aspect, the lower cavity inwall (11) of extrusion pressing type core retainer plate and pressure ram (04)
Gap is in 4～10mm.
In currently preferred aspect, the crush stroke of described pressure ram (04) reaches 10～30mm, and after extruding
Pressure ram front end (08) is with a distance from cast(ing) surface (07) in 2～5mm.
In currently preferred aspect, the extruding opening time that two fast transfer points start timing is 0.5～3s, and extruding postpones
Time is 3～15s.
In currently preferred aspect, the local compression core return again ejects and is sprayed.
In currently preferred aspect, described extrusion oil cylinder piston (06) with the sectional area ratio of pressure ram (04) is
12；When extrusion oil cylinder piston (06) does not extrude, pressure ram front end (08) exceeds extruded sleeve end face (10) 10mm；
Gap between the lower cavity inwall (11) of extrusion pressing type core retainer plate and pressure ram outline (04) is in 4mm；Described
The crush stroke of pressure ram (04) reaches 10～30mm, and after extruding pressure ram front end (08) from cast(ing) surface (07)
Distance is in 5mm.The extruding opening time that two fast transfer points start timing is 2s, and extruding time delay is 10s.
In other aspects of the present invention, additionally provide a kind of local compression structure for high-pressure casting and process,
The described local compression structure for aluminium alloy high pressure casting include extruding boss (02), extrusion pressing type core retainer plate (03),
Pressure ram (04), extrusion oil cylinder (05), extrusion oil cylinder piston (06).Described extrusion piston (06) and pressure ram
(04) sectional area ratio more than 10, to ensure sufficiently large extruding force.When oil cylinder piston does not extrude (being in zero-bit)
When, the front end (08) of pressure ram exceeds extruded sleeve end face (10) 4～10mm, S simultaneously pressure ram front end (08) with
Form cavity (12) between the lower cavity inwall (11) of extrusion pressing type core retainer plate；In pressure ram extrusion process, extrusion pressing type
Gap between the lower cavity inwall (11) of core retainer plate and pressure ram (04) 4～10mm (namely extruding boss (02)
Wall thickness range).Reach good squeezing effect for guarantee local compression technique, by adjusting the local compression on die casting machine
Open and delay time is it is ensured that the crush stroke of pressure ram reaches 10～30mm, and pressure ram front end (08) after extruding
In 2～5mm with a distance from cast(ing) surface (07), and thick most of detection display to foundry goods (01) for the x-ray detection machine
No shrinkage defect.In described local compression technique, the extruding opening time (two fast transfer points start timing) is 0.5～3s,
Extruding time delay is 3～15s, and in coating cycles, the local compression core return needs again to eject and sprayed,
To carry out good cooling and lubrication to extruding core, preventing from, in extrusion process, stuck phenomenon occurs, improving local and squeezing
The life-span of die mould core.
The invention discloses a kind of local compression structure of high-pressure casting and technique, for the local of aluminium alloy high pressure casting
Extrusion structure includes extruding boss (02), extrusion pressing type core retainer plate (03), pressure ram (04), extrusion oil cylinder (05), extruding
Oil cylinder piston (06).It is characterized in that：Described extrusion oil cylinder piston (06) and the sectional area ratio of pressure ram (04)
10 need to be more than, to ensure sufficiently large extruding force.Currently preferred aspect, (is in zero when oil cylinder piston does not extrude
Position) when, pressure ram front end (08) exceeds extruded sleeve end face (10) 4～10mm, simultaneously pressure ram front end (08) with
Form cavity (12) between the lower cavity inwall (11) of extrusion pressing type core retainer plate；In pressure ram extrusion process, extrusion pressing type
Gap between the lower cavity inwall (11) of core retainer plate and pressure ram (04) 4～10mm (namely extruding boss (02)
Wall thickness range, can guarantee that the heat storage capacity of extruding cavity (12), prevents aluminium liquid from entering premature solidification after cavity, leads to
Local compression technique adjustable extent narrows).The present invention is to ensure that local compression technique reaches squeezing effect well, need to lead to
Local compression on toning seamless casting machine is opened and delay time is it is ensured that the crush stroke of pressure ram reaches 10～30mm, and
And after extruding in 2～5mm with a distance from cast(ing) surface (07), and x-ray detection machine is to foundry goods for pressure ram front end (08)
(01) thick most of detection display no shrinkage defect.Currently preferred aspect, extruding in local compression technique is opened
Opening the time (two fast transfer points start timing) is 0.5～3s, and extruding time delay is 3～15s.Currently preferred side
Face, in coating cycles, the local compression core return needs again to eject and is sprayed, to enter to extruding core
The good cooling of row and lubrication, prevent from occurring stuck phenomenon in extrusion process, improve the life-span of local compression core.
Method of the present invention advantage is：The crush stroke of local compression technique can be effectively ensured, reduce product thick simultaneously
The shrinkage defect of big position, produces percent defective and declines, Business Economic Benefit significantly improves.
Brief description
Hereinafter, to describe embodiment of the present invention in detail in conjunction with accompanying drawing, wherein：
Fig. 1：Local extrusion device structural representation before extrusion for high-pressure casting；
Fig. 2：Local extrusion device structural representation after extrusion for high-pressure casting；
Before extruding；Right figure：After extruding)
In figure：01- foundry goods, 02- extruding boss, 03- extrusion pressing type core retainer plate, 04- pressure ram, 05- extrusion oil cylinder, 06- extruding
Oil cylinder piston, 07- cast(ing) surface, 08- pressure ram front end, 10- extruded sleeve end face, the lower cavity of 11- extrusion pressing type core retainer plate
Inwall, 12- cavity.
Specific embodiment
Test group 1
Local compression structure for aluminium alloy high pressure casting includes extruding boss (02), extrusion pressing type core retainer plate (03), squeezes
Depression bar (04), extrusion oil cylinder (05), extrusion oil cylinder piston (06).Described extrusion oil cylinder piston (06) and extruding
The sectional area of bar (04) than for 12, to ensure sufficiently large extruding force.When oil cylinder piston does not extrude (being in zero-bit)
When, pressure ram front end (08) exceeds extruded sleeve end face (10) 10mm, simultaneously pressure ram front end (08) and extrusion pressing type
Form cavity (12) between the lower cavity inwall (11) of core retainer plate；In pressure ram extrusion process, extrusion pressing type core retainer plate
Gap between lower cavity inwall (11) and pressure ram (04) outline 10mm (namely extruding boss (02)
Wall thickness range).Reach good squeezing effect for guarantee local compression technique, by adjusting the local compression on die casting machine
Open and delay time be it is ensured that the crush stroke of pressure ram reaches 15mm, and after extruding pressure ram front end (08) from
Cast(ing) surface (07) distance is in 2mm, and x-ray detection machine no contracts to thick most of detection display of foundry goods (01)
Loose defect.In described local compression technique, the extruding opening time (two fast transfer points start timing) is 3s, extrolling
Time is 3s late, and in coating cycles, the local compression core return need to again eject and be sprayed, so as to extruding
Core carries out good cooling and lubrication, prevents from occurring stuck phenomenon in extrusion process, improves the longevity of local compression core
Life.
Test group 2
Local compression structure for aluminium alloy high pressure casting includes extruding boss (02), extrusion pressing type core retainer plate (03), squeezes
Depression bar (04), extrusion oil cylinder (05), extrusion oil cylinder piston (06).Described extrusion oil cylinder piston (06) and extruding
The sectional area of bar (04) than for 12, to ensure sufficiently large extruding force.When oil cylinder piston does not extrude (being in zero-bit)
When, pressure ram front end (08) exceeds extruded sleeve end face (10) 4mm, simultaneously pressure ram front end (08) and extrusion pressing type
Form cavity (12) between the lower cavity inwall (11) of core retainer plate；In pressure ram extrusion process, extrusion pressing type core retainer plate
Gap between lower cavity inwall (11) and pressure ram (04) outline 4mm (namely extruding boss (02)
Wall thickness range).Reach good squeezing effect for guarantee local compression technique, by adjusting the local compression on die casting machine
Open and delay time be it is ensured that the crush stroke of pressure ram reaches 10mm, and after extruding pressure ram front end (08) from
Cast(ing) surface (07) distance is in 3mm, and x-ray detection machine no contracts to thick most of detection display of foundry goods (01)
Loose defect.In described local compression technique, the extruding opening time (two fast transfer points start timing) is 0.5s, extruding
Time delay is 8s, and in coating cycles, the local compression core return need to again eject and be sprayed, so as to crowded
Die mould core carries out good cooling and lubrication, prevents from occurring stuck phenomenon in extrusion process, improves local compression core
Life-span.
Test group 3
Local compression structure for aluminium alloy high pressure casting includes extruding boss (02), extrusion pressing type core retainer plate (03), squeezes
Depression bar (04), extrusion oil cylinder (05), extrusion oil cylinder piston (06).Described extrusion oil cylinder piston (06) and extruding
The sectional area of bar (04) than for 12, to ensure sufficiently large extruding force.When oil cylinder piston does not extrude (being in zero-bit)
When, pressure ram front end (08) exceeds extruded sleeve end face (10) 10mm, simultaneously pressure ram front end (08) and extrusion pressing type
Form cavity (12) between the lower cavity inwall (11) of core retainer plate；In pressure ram extrusion process, extrusion pressing type core retainer plate
Gap between lower cavity inwall (11) and pressure ram (04) outline 4mm (namely extruding boss (02)
Wall thickness range).Reach good squeezing effect for guarantee local compression technique, by adjusting the local compression on die casting machine
Open and delay time be it is ensured that the crush stroke of pressure ram reaches 10mm, and after extruding pressure ram front end (08) from
Cast(ing) surface (07) distance is in 5mm, and x-ray detection machine no contracts to thick most of detection display of foundry goods (01)
Loose defect.In described local compression technique, the extruding opening time (two fast transfer points start timing) is 2s, extrolling
Time is 10s late, and in coating cycles, the local compression core return need to again eject and be sprayed, so as to crowded
Die mould core carries out good cooling and lubrication, prevents from occurring stuck phenomenon in extrusion process, improves local compression core
Life-span.
Result of the test
Carry out specifically according to above setting in the research and development workshop of engineering and technological research institute of CITIC Dicastal Co., Ltd.
Test.Result of the test shows, casting wasted product the sending out in test group 1-3 that the shrinkage defect of the thick big position of product leads to
Raw rate have dropped 70.24%, 76.20% and 87.15% respectively.
As can be seen here, the local extrusion device of each test group of the present invention makes the shrinkage defect of the thick big position of product lead to
Casting wasted product reduce.And the pressurizing unit of test group 3 makes the shrinkage defect of the thick big position of product unexpectedly
Greatly reduce, so that production cost significantly declines.
Above-described embodiment only technology design to illustrate the invention and feature, its object is to allow person skilled in the art
Scholar will appreciate that present disclosure and is carried out, and can not be limited the scope of the invention with this, all according to this
Equivalence changes or modification that spirit is substantially made, all should cover within the scope of the present invention.
Claims (10)
1. a kind of local compression method for high-pressure casting is it is characterised in that described method is included using for height
The local extrusion device that die casting is made is extruded in cast(ing) surface；The described local extrusion device for high-pressure casting by
Extrusion pressing type core retainer plate (03), pressure ram (04), extrusion oil cylinder (05), extrusion oil cylinder piston (06) are formed, and it is special
Levy and be：Described extrusion oil cylinder (05) includes extrusion oil cylinder piston (06), described extrusion oil cylinder piston (06)
It is connected with pressure ram (04), and described pressure ram (04) is located in extrusion pressing type core retainer plate (03), extrusion pressing type core retainer plate
(03) fixing with extrusion oil cylinder (05)；Described driving extrusion oil cylinder piston (06) that is pressed through drives pressure ram
(04) completing.
2. the local compression method for high-pressure casting according to claim 1 is it is characterised in that described squeezes
Die mould core retainer plate (03) includes cavity (12) on the direction towards foundry goods (01).
3. the local compression method for high-pressure casting according to claim 1 is it is characterised in that described squeezes
The sectional area of compressing cylinder piston (06) and pressure ram (04) is than more than 10.
4. the local compression method for high-pressure casting according to claim 1 is it is characterised in that described squeezes
The sectional area of compressing cylinder piston (06) and pressure ram (04) ratio is for 10-40.
5. the local compression method for high-pressure casting according to claim 1 is it is characterised in that described squeezes
The sectional area of compressing cylinder piston (06) and pressure ram (04) ratio is for 12.
6. the local compression method for high-pressure casting according to claim 1 is it is characterised in that work as extruding oil
When cylinder piston (06) does not extrude, pressure ram front end (08) exceeds extruded sleeve end face (10) 4～10mm.
7. the local compression method for high-pressure casting according to claim 1 is it is characterised in that extrude core
Gap between the lower cavity inwall (11) of set and pressure ram (04) is in 4～10mm.
8. the local compression method for high-pressure casting according to claim 1 is it is characterised in that described squeezes
The crush stroke of depression bar (04) reaches 10～30mm, and after extruding pressure ram front end (08) from cast(ing) surface (07)
Distance is in 2～5mm.
9. the local compression method for high-pressure casting according to claim 1 is it is characterised in that two speed are changed
The extruding opening time that point starts timing is 0.5～3s, and extruding time delay is 3～15s.
10. the local compression method for high-pressure casting according to claim 1 is it is characterised in that described
The sectional area of extrusion oil cylinder piston (06) and pressure ram (04) ratio is for 12；When extrusion oil cylinder piston (06) does not extrude
When, pressure ram front end (08) exceeds extruded sleeve end face (10) 10mm；The lower cavity inwall (11) of extrusion pressing type core retainer plate
Gap and pressure ram outline (04) between is in 4mm；The crush stroke of described pressure ram (04) reaches 10～30mm,
And after extruding pressure ram front end (08) with a distance from cast(ing) surface (07) in 5mm.Two fast transfer points start timing
The extruding opening time is 2s, and extruding time delay is 10s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610430677.8A CN106392033A (en) | 2016-06-16 | 2016-06-16 | Local extrusion method used for high-pressure casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610430677.8A CN106392033A (en) | 2016-06-16 | 2016-06-16 | Local extrusion method used for high-pressure casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106392033A true CN106392033A (en) | 2017-02-15 |
Family
ID=58006395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610430677.8A Pending CN106392033A (en) | 2016-06-16 | 2016-06-16 | Local extrusion method used for high-pressure casting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114700477A (en) * | 2022-02-25 | 2022-07-05 | 东风汽车集团股份有限公司 | High-pressure casting local extrusion control method, device, equipment and medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0259160A (en) * | 1988-08-24 | 1990-02-28 | Kobe Steel Ltd | Apparatus for manufacturing casting having thick parts at both ends |
| JPH05123846A (en) * | 1991-11-01 | 1993-05-21 | Daihatsu Motor Co Ltd | Device for partially pressurizing molten metal in pressurizing casting machine |
| CN103658593A (en) * | 2013-12-06 | 2014-03-26 | 宁波旭升机械有限公司 | Vacuum secondary extrusion die and die casting method |
| CN203526510U (en) * | 2013-08-26 | 2014-04-09 | 江苏徐航科技有限公司 | Multipoint local extrusion mechanism of CVT gearbox shell die-casting die |
| CN204842909U (en) * | 2015-08-05 | 2015-12-09 | 宁波博大机械有限公司 | Local pressurized construction of die mould |
-
2016
- 2016-06-16 CN CN201610430677.8A patent/CN106392033A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0259160A (en) * | 1988-08-24 | 1990-02-28 | Kobe Steel Ltd | Apparatus for manufacturing casting having thick parts at both ends |
| JPH05123846A (en) * | 1991-11-01 | 1993-05-21 | Daihatsu Motor Co Ltd | Device for partially pressurizing molten metal in pressurizing casting machine |
| CN203526510U (en) * | 2013-08-26 | 2014-04-09 | 江苏徐航科技有限公司 | Multipoint local extrusion mechanism of CVT gearbox shell die-casting die |
| CN103658593A (en) * | 2013-12-06 | 2014-03-26 | 宁波旭升机械有限公司 | Vacuum secondary extrusion die and die casting method |
| CN204842909U (en) * | 2015-08-05 | 2015-12-09 | 宁波博大机械有限公司 | Local pressurized construction of die mould |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114700477A (en) * | 2022-02-25 | 2022-07-05 | 东风汽车集团股份有限公司 | High-pressure casting local extrusion control method, device, equipment and medium |
| CN114700477B (en) * | 2022-02-25 | 2023-07-25 | 东风汽车集团股份有限公司 | High-pressure casting local extrusion control method, device, equipment and medium |
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