CN207746396U - A kind of full aluminium thin-walled hollow Rear secondary frame for vehicle metal-mold low-pressure casting mold of automobile - Google Patents
A kind of full aluminium thin-walled hollow Rear secondary frame for vehicle metal-mold low-pressure casting mold of automobile Download PDFInfo
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- CN207746396U CN207746396U CN201721897981.XU CN201721897981U CN207746396U CN 207746396 U CN207746396 U CN 207746396U CN 201721897981 U CN201721897981 U CN 201721897981U CN 207746396 U CN207746396 U CN 207746396U
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Abstract
A kind of full aluminium thin-walled hollow Rear secondary frame for vehicle metal-mold low-pressure casting mold of automobile, it includes upper framed (1), cope plate (2), lower template (3), lower die holder (4) and negative pressure ventilation mechanism (5), it is respectively equipped with overall unchoked running system on cope plate (2) and a pair of of Rear secondary frame for vehicle cavity of lower template (3), multiple sprues (11), the total sectional area proportionate relationship of multiple cross gates (12) and multiple ingates (13) is in the straight horizontal ＜ ∑s A of ＜ ∑s A of ∑ A, and single sprue (11), cross gate (12), the section area ratio relationship of ingate (13) is in the horizontal ＞ A of the straight ＞ A of A；The utility model advantage is：1, its mold design is reasonable, tensile strength；2, cavity is laid out using two chamber of a mould, improves production efficiency, is reduced by a stalk and is improved opposite yield rate.
Description
Technical field
The utility model is related to machinery equipment field, and in particular to a kind of full aluminium thin-walled hollow Rear secondary frame for vehicle metal mold of automobile
Low pressure casting die.
Background technology
As the rapid growth of car ownership brings the Double jeopardy of the energy and environment, automotive light weight technology（It refers mainly to
Passenger car）It is one of the effective ways for realizing energy-saving and emission-reduction.Aluminum alloy materials are with density is small, formability is good, corrosion resistance
Excellent feature becomes the important channel of automobile lightweight.Many power/drive system parts on passenger car at present
Lightweight is realized（Aluminium alloying）Foundry Production, but for the lightweight of the critical structural components such as vehicle body/chassis suspension, casting
Technological development and production then obviously lag behind power/driving part, be current automotive light weight technology technological development Disciplinary Frontiers it
One.
Rear secondary frame for vehicle be support rear axle, suspension holder, be the important component for being related to ride safety of automobile, once failure
The life security of occupant will be directly threatened, aluminum alloy auxiliary vehicle frame forming technique mainly has both at home and abroad at present：Extrusion forming, high die casting
It makes and gravitational casting.Be squeezed the technique limitation of casting and high-pressure casting, can not molding cavity complexity hollow structure casting；Weight
Although power casting is suitble to do hollow casting, is limited by gravity feeding directionality and will produce shrinkage porosite to disperseing thermal center on subframe
The control means of risk are limited, and forming thin-walled part needs to keep higher mold temperature, productive temp under gravity condition
It is long.Therefore how to produce and meet the full aluminium thin-walled hollow Rear secondary frame for vehicle that intensity, toughness, corrosion resistance meet lightweight requirements again
Product is difficult, is used for reference both at home and abroad without success precedent.
Utility model content
The purpose of this utility model provides a kind of full aluminium thin-walled hollow Rear secondary frame for vehicle of automobile aiming at above-mentioned deficiency
Metal-mold low-pressure casting mold.
The utility model includes upper framed, cope plate, lower template, lower die holder and negative pressure ventilation mechanism, it is upper it is framed in be equipped with
Resetting-mechanism is ejected, ejection resetting-mechanism is movably arranged on upper framed interior, cope plate and lower die by one group of guide rail slide block component
Be equipped with water cooling tube group on plate and put cold pipe group, cope plate be mounted on it is upper it is framed on, lower template is mounted on lower die holder, cope plate
On be provided with gas vent, the air inlet of negative pressure ventilation mechanism and the gas vent of cope plate communicate；Cope plate and lower template composition have one
To Rear secondary frame for vehicle cavity, it is respectively equipped with overall unchoked running system on a pair of of Rear secondary frame for vehicle cavity of cope plate and lower template,
Overall unchoked running system includes multiple sprues, multiple cross gates and multiple ingates, multiple sprues, multiple cross gates
It is in the horizontal ＜ ∑s A of the straight ＜ ∑s A of ∑ A with the total sectional area proportionate relationships of multiple ingates, and single sprue, cross gate, interior pours
The section area ratio relationship in road is in the horizontal ＞ A of the straight ＞ A of A.
Ejection resetting-mechanism includes push plate and top plate, and top plate is equipped with one group of mandril, it is logical that one group of mandril is provided on cope plate
Via, push plate and top plate are movably arranged on by one group of guide rail slide block component upper framed interior respectively.
The utility model advantage is：1, full aluminium thin-walled hollow Rear secondary frame for vehicle is produced with low-pressure casting process, mold is set
Meter is reasonable, and process is reliable, and the internal quality of casting is stablized, and the performances such as tensile strength, yield strength, elongation percentage, hardness, grain size refer to
Reference symbol closes design requirement；
2, according to Rear secondary frame for vehicle be left and right symmetrical member the characteristics of, cavity using two chamber of a mould be laid out, raising production efficiency,
It reduces by a stalk and improves opposite yield rate；
3, overall unchoked running system, anti-volume gas and secondary oxidation slag inclusion are devised for oxidizable cast aluminium alloy gold
Effect it is good；Ensure that single ingate, cross gate, sprue are in positive-pressure gating system simultaneously, makes casting consecutive solidification and protect
The transmission of pressure when having demonstrate,proved solidification；
4, negative pressure ventilation mechanism structure is simple, and the negative pressure in cavity can be formed using compressed air, is discharged in cavity
Sand core is got angry, and casting blowhole is reduced；
5, key position set-point it is cold come adjust mold temperature realize casting consecutive solidification, avoid shrinkage cavity shrinkage porosity wind
Danger, the whole mould temperature of the uniformly distributed direct-cooled control of mold reduce cooling time, improve production efficiency in rational processing range.
Description of the drawings
Fig. 1 is the utility model structure diagram.
Fig. 2 is the utility model injection system structure schematic diagram.
Specific implementation mode
As shown in the picture, the utility model includes upper framed 1, cope plate 2, lower template 3, lower die holder 4 and negative pressure ventilation machine
Structure 5, upper framed 1 interior be equipped with eject resetting-mechanism 6, and ejection resetting-mechanism 6 is movably arranged on by one group of guide rail slide block component
In framed 1, it being equipped with water cooling tube group 7 on cope plate 2 and lower template 3 and puts cold pipe group 8, cope plate 2 is mounted on upper framed 1,
Lower template 3 is mounted on lower die holder 4, and gas vent, the row of the air inlet and cope plate 2 of negative pressure ventilation mechanism 5 are provided on cope plate 2
Stomata communicates；Cope plate 2 and lower template 3, which form, a pair of of Rear secondary frame for vehicle cavity, secondary vehicle after a pair of cope plate 2 and lower template 3
Overall unchoked running system is respectively equipped on frame cavity, overall unchoked running system includes multiple sprues 11, multiple cross
Running channel 12 and multiple ingates 13, and the total sectional area ratio of multiple sprues 11, multiple cross gates 12 and multiple ingates 13
Relationship is in the horizontal ＜ ∑s A of the straight ＜ ∑s A of ∑ A, and the section area ratio relationship of single sprue 11, cross gate 12, ingate 13 is A
In the horizontal ＞ A of straight ＞ A.
It includes push plate and top plate to eject resetting-mechanism 6, and top plate is equipped with one group of mandril, one group of mandril is provided on cope plate 2
Through hole, push plate and top plate are movably arranged on by one group of guide rail slide block component in upper framed 1 respectively.
The design of running gate system：
According to the feature that the left and right part of Rear secondary frame for vehicle is full symmetric, mold cavity uses the layout of " a mould two-chamber ".Upper and lower
Running gate system is offered on mold cavity respectively.It is mainly made of sprue 11, cross gate 12 and ingate 13.
（1）The determination of ingate sectional area：
Ingate is just calculated and is modified by practical experience, the design formula of ingate by thermal center method：
D=（0.8-1.2）dc
In A=π（D/2）²
D is ingate diameter in formula, and dc is thermal center circular diameter, is ingate sectional area in A.
（2）The determination of cross gate and sprue sectional area：
According to the oxidizable feature of low-pressure casting process and cast aluminium alloy gold, unchoked running system is designed -- guarantee is poured
Road total sectional area is incrementally increased towards ingate, i.e. in the horizontal ＜ ∑s A of the straight ＜ ∑s A of ∑ A.But in order to control solidification sequence and ensure to press
The transmission of power should ensure that for single sprue, cross gate and ingate area in the horizontal ＞ A of the straight ＞ A of A.
This case ∑ A is straight：∑ A is horizontal：In ∑ A=1:1.2:2.4
A is straight：A is horizontal：In A=（2~2.3）：（1.5~1.7）：1
（3）The determination of stalk discharge area：
For " laminar flow " state for realizing when liquid metal filling, the size of Rational choice stalk exit sectional area is needed, profit
Stalk discharge area is calculated with formula：
F is stalk discharge area, cm2 in formula；G is molten metal weight needed for casting（This case is 24.1kg）；Z is casting
Fill the cavity time（This case is 7s）；μ is flow resistance coefficient of the molten metal in the temperature, resistance system when 700 DEG C of aluminium alloy
Number is 0.3~0.4（This case takes 0.4）；γ is proportion of the molten metal in the temperature（This case is 2.42g/cm3）；G adds for gravity
Speed, 980cm/s2；H is the height that molten metal contracting rises（This case is 24cm）.
Thus stalk discharge area F >=16.4cm2 is calculated, this case is " layer when 38.5cm2 meets liquid metal filling
The condition of stream ".
The hollow lumen of casting is molded by an integral sand core, using phenolic resin hot box coremaking, the leading indicator of sand core
For hot bending strength 1.5MPa, room temperature bending strength 3MPa, calcination is kept to 2%, and fusing point is 95-105 DEG C, granularity 70/140.
Sand core and exhaust system design：
Since film covered sand core gas forming amount is big, the blowhole of casting is caused to avoid sand core from getting angry, is increased on mold
Negative pressure ventilation mechanism, extraction sector copper pipe unicom sand core head outlet position, according to bernoulli principle, " flow velocity is bigger, pressure
It is smaller ", increase gas flow velocity to outside mold in exhaust pipe using compressed air, the copper intraductal pressure being connect with core print is made to reduce,
Sand core is got angry outside copper pipe discharge mold, casting blowhole is reduced.
Mold cooling system designs：
There is the position of the shrinkage porosite risk set-point on mold cold for product, adjusts solidification sequence, ensure part key position
The internal soundness and structure property set.
The uniformly distributed direct-cooled pipeline in upper and lower mold benevolence, mold temperature is relative constant when making continuous production, avoids mould temperature excessively high
Influence productive temp and product quality.
Working method principle：Cope plate 2 and lower template 3 are mounted on air injection machine by upper framed 1 and lower die holder 4 respectively
On, sprayed coating after casting front mold is preheated to 180 ~ 200 DEG C, cavity 0.08 ~ 0.12mm of paint thickness, running channel paint thickness 1 ~
1.2mm.Mold is continued to be heated to 380 DEG C after the completion of spraying, at cope plate 2 and the cold pipe group of the water cooling tube group 7 of lower template 3, point 8
In on-state, stalk preheating is carried out, when casting starts, upper framed 1 drives cope plate 2 to open, and first makes preheating
It in qualified sand core tripping in lower template 3, is molded after blowing off cavity, casting machine, which executes, rises liquid increase program, is also turned on negative pressure ventilation
Mechanism 5.Aluminum alloy melt is pressed into sprue 11, cross gate 12, ingate 13 by stalk and is full of cavity, and there are three rise for this case
Liquid mouth, i.e. three sprues 11, an intermediate sprue 11 are poured into a mould to two Rear secondary frame for vehicle cavities simultaneously respectively, form overall open
Formula running gate system is put, the sprue 11 at both ends is respectively that corresponding Rear secondary frame for vehicle cavity is individually poured into a mould, and makes single sprue 11, cross
Running channel 12, ingate 13 are in positive-pressure gating system, and pressurize 5s is further continued for supercharging 3s, sand after sand core surface aluminum alloy melt crust
Core meets the gas generated after high temperature molten aluminum and mold is discharged by negative pressure ventilation device.When aluminum alloy melt is full of cavity, cope plate 2 is opened
Terminate with the water cooling tube group 7 of lower template 3, the cold pipe group 8 of point to pressurize, pressure along stalk, sprue 11, cross gate 12, interior pour
Road 13 is transferred to casting, and from top to bottom order of crystallization solidifies casting under stress, and thermal center position obtains effective feeding；Pressurize terminates
Framed 1 drive cope plate 2 is opened on 120s afterwards, and ejection resetting structure 6 moves downward under the effect of low pressure casting machine oil cylinder by casting
The cavity of cope plate 2 is ejected with running gate system, a low pressure casting cycle is completed in robot pickup.
After preliminary low-pressure casting system designs, AnyCasting simulation softwards is selected to carry out low-pressure casting process
CAE analysis, the bush hole for finding part by analysis under pressure, are obtained for preferable feeding, generate shrinkage cavity and porosity
Probability it is little.But at lug-mounted position, since structure needs wall thickness to increase, several isolated thermal centers, the heat are formd
Section is not on die joint, and Feeding channel size is not big enough, and there are shrinkage porosite risks.At this moment can water cooling plant be set in corresponding position,
Accelerate the cooling velocity at the thick big position of casting, reach consecutive solidification from top to down and eliminate the generation of shrinkage cavity and porosity in part,
Concrete operations are cooled to pressurize for the point of the unlatching corresponding position when part is full of cavity and terminate.Dope layer is gone back meanwhile, it is to be noted that playing
It acts on, thin, the thin place's painting thickness of wall is applied at wall thickness.
Claims (2)
1. a kind of full aluminium thin-walled hollow Rear secondary frame for vehicle metal-mold low-pressure casting mold of automobile, it is characterised in that it includes upper framed
(1), cope plate (2), lower template (3), lower die holder (4) and negative pressure ventilation mechanism (5) are equipped with ejection reset machine in upper framed (1)
Structure (6), ejection resetting-mechanism (6) are movably arranged on by one group of guide rail slide block component in upper framed (1), cope plate (2) and under
Water cooling tube group (7) and the cold pipe group (8) of point are equipped in template (3), cope plate (2) is mounted on upper framed (1), lower template (3)
On lower die holder (4), it is provided with gas vent on cope plate (2), the air inlet of negative pressure ventilation mechanism (5) and cope plate (2)
Gas vent communicates；Cope plate (2) and lower template (3) composition have a pair of of Rear secondary frame for vehicle cavity, cope plate (2) and lower template (3)
Overall unchoked running system is respectively equipped on a pair of of Rear secondary frame for vehicle cavity, overall unchoked running system includes multiple sprues
(11), multiple cross gates (12) and multiple ingates (13), multiple sprues (11), multiple cross gates (12) and multiple ingates
(13) total sectional area proportionate relationship is in the horizontal ＜ ∑s A of the straight ＜ ∑s A of ∑ A, and single sprue (11), cross gate (12), interior pours
The section area ratio relationship in road (13) is in the horizontal ＞ A of the straight ＞ A of A.
2. the full aluminium thin-walled hollow Rear secondary frame for vehicle metal-mold low-pressure casting mold of a kind of automobile according to claim 1, special
Sign is that it includes push plate and top plate to eject resetting-mechanism (6), and top plate is equipped with one group of mandril, one group of top is provided on cope plate (2)
Bar through hole, push plate and top plate are movably arranged on by one group of guide rail slide block component in upper framed (1) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721897981.XU CN207746396U (en) | 2017-12-29 | 2017-12-29 | A kind of full aluminium thin-walled hollow Rear secondary frame for vehicle metal-mold low-pressure casting mold of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721897981.XU CN207746396U (en) | 2017-12-29 | 2017-12-29 | A kind of full aluminium thin-walled hollow Rear secondary frame for vehicle metal-mold low-pressure casting mold of automobile |
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| Publication Number | Publication Date |
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| CN207746396U true CN207746396U (en) | 2018-08-21 |
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| CN201721897981.XU Active CN207746396U (en) | 2017-12-29 | 2017-12-29 | A kind of full aluminium thin-walled hollow Rear secondary frame for vehicle metal-mold low-pressure casting mold of automobile |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111182752A (en) * | 2019-12-30 | 2020-05-19 | 贵州新蓝辉金属制品有限公司 | Radiator case for magnetic suspension train and casting method thereof |
| CN112658217A (en) * | 2021-03-18 | 2021-04-16 | 龙口市和义机械配件有限公司 | Manufacturing method of ventilation brake disc |
| CN114570913A (en) * | 2022-03-17 | 2022-06-03 | 湖北航特装备制造股份有限公司 | Metal mold low-pressure casting process for Porsche aluminum alloy auxiliary frame |
| CN114734021A (en) * | 2021-12-22 | 2022-07-12 | 佛山市南海奔达模具有限公司 | Aluminum alloy hollow auxiliary frame casting structure |
| CN114799127A (en) * | 2022-03-16 | 2022-07-29 | 中国第一汽车股份有限公司 | Low-pressure metal mold casting method for integral hollow auxiliary frame |
| CN114734021B (en) * | 2021-12-22 | 2024-11-19 | 佛山市南海奔达模具有限公司 | Aluminum alloy hollow auxiliary frame casting structure |
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2017
- 2017-12-29 CN CN201721897981.XU patent/CN207746396U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111182752A (en) * | 2019-12-30 | 2020-05-19 | 贵州新蓝辉金属制品有限公司 | Radiator case for magnetic suspension train and casting method thereof |
| CN111182752B (en) * | 2019-12-30 | 2021-04-13 | 贵州新蓝辉金属制品有限公司 | Radiator case for magnetic suspension train and casting method thereof |
| CN112658217A (en) * | 2021-03-18 | 2021-04-16 | 龙口市和义机械配件有限公司 | Manufacturing method of ventilation brake disc |
| CN114734021A (en) * | 2021-12-22 | 2022-07-12 | 佛山市南海奔达模具有限公司 | Aluminum alloy hollow auxiliary frame casting structure |
| CN114734021B (en) * | 2021-12-22 | 2024-11-19 | 佛山市南海奔达模具有限公司 | Aluminum alloy hollow auxiliary frame casting structure |
| CN114799127A (en) * | 2022-03-16 | 2022-07-29 | 中国第一汽车股份有限公司 | Low-pressure metal mold casting method for integral hollow auxiliary frame |
| CN114799127B (en) * | 2022-03-16 | 2024-04-09 | 中国第一汽车股份有限公司 | Low-pressure metal mold casting method for integral hollow auxiliary frame |
| CN114570913A (en) * | 2022-03-17 | 2022-06-03 | 湖北航特装备制造股份有限公司 | Metal mold low-pressure casting process for Porsche aluminum alloy auxiliary frame |
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