CN219648644U - Passenger car wheel casting die for improving mechanical property of rim rear rim - Google Patents
Passenger car wheel casting die for improving mechanical property of rim rear rim Download PDFInfo
- Publication number
- CN219648644U CN219648644U CN202321094379.8U CN202321094379U CN219648644U CN 219648644 U CN219648644 U CN 219648644U CN 202321094379 U CN202321094379 U CN 202321094379U CN 219648644 U CN219648644 U CN 219648644U
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- rim
- rear rim
- die
- passenger car
- forming part
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- 238000005266 casting Methods 0.000 title claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 70
- 230000007246 mechanism Effects 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000012535 impurity Substances 0.000 abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 18
- 229910052782 aluminium Inorganic materials 0.000 description 18
- 239000007788 liquid Substances 0.000 description 17
- 238000003754 machining Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The utility model belongs to the technical field of hub casting, and particularly relates to a passenger car wheel casting die for improving the mechanical properties of a rear rim of a rim, which comprises an upper die, a side die and a bottom die, wherein the upper die, the side die and the bottom die enclose a hub cavity, the upper end of the hub cavity is provided with a rear rim forming part, the rear rim forming part is formed by enclosing the upper die and the side die, the rear rim forming part extends upwards and is gradually folded to form a gradual-closing section, the thickness of the gradual-closing section is gradually reduced from bottom to top, and the top of the upper die is provided with a first cooling mechanism. The utility model has the advantages of reducing impurities, oxides and shrinkage holes contained in the rear rim of the hub, thereby improving the mechanical property of the rear rim of the hub.
Description
Technical Field
The utility model belongs to the technical field of hub casting, and particularly relates to a passenger car wheel casting die for improving the mechanical property of a rim rear rim.
Background
The hub is an important driving part of the automobile, transverse and longitudinal loads are generated during the driving process of the automobile, and meanwhile, the hub needs to bear a considerable part of loads along with driving moment, braking moment and the like. At present, the most common problem of automobile hubs is deformation and fracture, and the wheel hub rim bending deformation and fracture ratio is quite large.
The Chinese patent with the application number of CN201520386043.8 discloses a hub die cooling device, which comprises a hub die consisting of an upper die, a side die and a bottom die, and is characterized in that: a first water cooling cavity is arranged at the rim hot joint of the upper die.
In the process of hub casting, impurities and oxides in the aluminum liquid are finally collected at the top of the rim of the upper die because the density of the impurities and the oxides is smaller than that of the aluminum liquid; in the technical scheme, as the top cavity of the rim of the upper die is flatter, turbulent flow gas rolling easily occurs after impurities and oxides in molten aluminum touch the flatter cavity, so that the impurities and the oxides sink downwards from the top of the rim, the rim of the hub contains impurities, oxides and gas shrinkage holes, the mechanical property of the rim of the hub is poor, and deformation and fracture easily occur.
Disclosure of Invention
The utility model aims to provide a casting mould for a passenger car wheel, which reduces impurities, oxides and shrinkage cavities contained in a rear rim of a wheel hub so as to improve the mechanical property of the rear rim of the wheel hub.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an improve rim rear rim mechanical properties's passenger car wheel casting mould, includes mould, side form and die block, go up mould, side form and die block and enclose into the wheel hub die cavity, the upper end of wheel hub die cavity is equipped with rear rim shaping portion, rear rim shaping portion by go up mould and side form enclosing and closing, rear rim shaping portion upwards extends and folds gradually in order to form gradually the section that closes, gradually the thickness of section that closes is from bottom to top dwindles gradually, the top of going up the mould is equipped with a cooling body.
In the casting process, impurities and oxides in the aluminum liquid can be finally located in the gradual-closing section of the rear rim forming part, the aluminum liquid of the gradual-closing section is solidified to form a machining allowance part with a thickening effect above the rear rim of the hub, the thickness of the machining allowance part is 6mm generally, an operator can machine the machining allowance part, the machining allowance part with poor mechanical property is removed, and accordingly the rear rim of the hub with good mechanical property is reserved. Because the gradually-combined section is arranged, the thickness of the rear rim forming part is increased, and in order to ensure the cooling temperature sequential gradient, a first cooling mechanism is arranged at the top of the upper die for cooling, so that the cooling of aluminum liquid in the rear rim forming part is quickened.
Preferably, the position of the side mold corresponding to the gradual-closing section is a vertical cylindrical surface, the position of the upper mold corresponding to the gradual-closing section is an inclined surface, and the cylindrical surface and the inclined surface jointly form the gradual-closing section.
Through the arrangement, when the upper die is assembled and attached with the side die, the position of the upper die corresponding to the gradual-fit section is an inclined plane, so that the inclined plane position of the upper die cannot be attached with the cylindrical surface of the side die, a part is left between the lower part of the inclined plane of the upper die and the cylindrical surface of the side die, and the gradual-fit section is formed by the part, so that the rear rim forming part is thickened.
Preferably, the upper end of the inclined plane forms a circular arc chamfer.
The upper end of the inclined plane forms an arc-shaped chamfer, so that the transition of the round angle at the upper end of the inclined plane can ensure smooth aluminum liquid filling as much as possible, and the generation of turbulent flow rolling gas is reduced, thereby avoiding impurities and oxides in the aluminum liquid from sinking into the rear rim and further improving the mechanical property of the rear rim of the hub.
Preferably, an annular groove is formed in the position, close to the rear rim forming part, of the inner cavity of the upper die.
Because the first cooling mechanism cools the rear rim, the middle part of the upper die and the middle part of the side die can form the rim forming part of the hub, in order to avoid the first cooling mechanism cooling the rim forming part below the rear rim forming part, an annular groove is required to be arranged at the position of the inner cavity of the upper die, which is close to the rear rim forming part, so that the cooling effect of the first cooling mechanism on the rim forming part is slowed down, the cooling temperature sequential gradient is ensured, and the feeding capacity of the rim part of the hub is improved
Preferably, the annular groove is positioned below the first cooling mechanism, the height A of the annular groove is 29-31mm, and the width B of the annular groove is 7-9mm.
Generally, the wall thickness of the lower end of the top of the upper die is 21-23mm, and after the annular groove with the height A of 29-31mm and the width B of 7-9mm is arranged, the low-temperature transmission of the first cooling mechanism can be blocked, the optimal cooling temperature sequential gradient is achieved, and the rim of the hub is prevented from being cooled too fast.
Preferably, the top of the annular groove is similar to the top of the gradual-fit section, and the wall thickness C between the upper die corresponding annular groove and the rear rim forming part is 14-16mm.
The wall thickness C between the upper die corresponding to the annular groove and the rear rim forming part is 14-16mm, so that the optimal cooling temperature sequential gradient can be achieved, and the rear rim can be rapidly cooled.
Preferably, the upper end of the upper die is provided with a push rod for ejecting the hub, and the first cooling mechanism is positioned on the inner side of the push rod.
The first cooling mechanism is provided inside the ejector pin so as to avoid the ejector pin.
Preferably, the first cooling mechanism is a straight water cooling structure.
The first cooling mechanism is far away from the rear rim forming part in order to avoid the ejector rod, the distance E between the first cooling mechanism and the upper end of the rear rim forming part is generally 33-35mm, the thickness of the rear rim of the wheel hub is generally larger than that of the rim in the nearby area, the rear rim is easy to solidify and is slower than the lower rim part, quality problems such as shrinkage porosity and shrinkage cavity are formed, the mechanical performance and the safety performance of a product of the wheel hub casting are affected, the temperature of the rear rim of the wheel hub is reduced rapidly, and the first cooling mechanism at the top of the upper die adopts a straight water cooling structure. The straight water cooling structure refers to a water cooling structure that water flow directly enters from one end and directly flows out from the other end.
Preferably, the side dies are four-opening dies, each side die is provided with a large ring part recessed inwards, each large ring part is provided with a plurality of second cooling mechanisms, and the second cooling mechanisms are opposite to the rear rim forming part.
The side mold large ring second cooling mechanism is opposite to the rear rim forming part and is matched with the first cooling mechanism, aluminum liquid in the rear rim forming part and the gradual-closing section is cooled simultaneously, the aluminum liquid in the gradual-closing section is quickly solidified, impurities and oxides in the aluminum liquid are quickly solidified in the gradual-closing section, and the cooling temperature sequential gradient of the rim is ensured.
Preferably, the wall thickness D between the side mold corresponding to the second cooling mechanism and the rear rim forming part is 14-16mm, and the second cooling mechanism is an air cooling structure.
The air cooling structure is characterized in that a plurality of air inlet holes are formed in the large ring part of the side die, the air inlet holes face the rear rim forming part, a fan is arranged on one side of the large ring part and faces the air inlet holes of the large ring part for direct blowing, the air cooling structure is simpler to assemble, the production cost is saved, and the wall thickness D between the side die corresponding to the second cooling mechanism and the rear rim forming part is set to be 14-16mm, so that the solidification speed between the rear rim and the rim can be balanced.
The utility model has the following advantages: impurities, oxides and shrinkage holes contained in the rear wheel rim of the wheel hub are reduced, so that the mechanical property of the rear wheel rim of the wheel hub is improved; the first cooling mechanism and the second cooling mechanism are arranged, so that the cooling of the rear rim part can be accelerated; an annular groove is arranged in the inner cavity of the upper die, the cooling of the first cooling mechanism to the rim is slowed down, and the cooling temperature sequential gradient is optimized.
Drawings
FIG. 1 is a cross-sectional view of the present utility model when aluminum liquid is injected.
Fig. 2 is an enlarged cross-sectional view of the junction of the upper die and side die of the present utility model.
FIG. 3 is a cross-sectional view of the hub blank after casting.
Fig. 4 is a top view of a side form of the present utility model.
Reference numerals: the upper die 1, the first cooling mechanism 11, the ejector rod 12, the side die 2, the large ring part 21, the second cooling mechanism 22, the bottom die 3, the hub cavity 4, the gradual-closing section 41, the rear rim forming part 42, the rim forming part 43, the annular groove 5, the hub 100, the machining allowance part 101, the rear rim 102 and the rim 103.
Detailed Description
The utility model is further described below with reference to the drawings and specific embodiments.
As shown in fig. 1 to 3, the present embodiment discloses a passenger car wheel casting mold for improving the mechanical properties of a rear rim of a rim, comprising an upper mold 1, a side mold 2 and a bottom mold 3, wherein the upper mold 1, the side mold 2 and the bottom mold 3 enclose a hub cavity 4, the middle part of the upper mold 1 and the middle part of the side mold 2 enclose a rim forming part 43 of the hub, the enclosing of the upper mold 1 and the side mold 2 forms a rear rim forming part 42 of the hub, the rear rim forming part 42 extends upwards and gradually closes to form a gradual-closing section 41, and the thickness of the gradual-closing section 41 gradually decreases from bottom to top. The position of the side die 2 corresponding to the gradually-closing section 41 is a vertical cylindrical surface, the position of the upper die 1 corresponding to the gradually-closing section 41 is an inclined surface, the upper end of the inclined surface forms an arc chamfer, the cylindrical surface and the inclined surface jointly form the gradually-closing section 41, the gradually-closing section 41 corresponds to the machining allowance part 101 of the post-casting rim 102, the upper end of the inclined surface of the post-casting machining allowance part 101 is in an arc chamfer shape (fillet transition), the size F of the arc chamfer is R7, and the machining allowance part 101 enables the hub 100 to have 6mm machining allowance.
As shown in fig. 1 and 2, the upper end of the upper die 1 is provided with a push rod 12 for ejecting the hub, the upper end of the upper die 1 is also provided with a first cooling mechanism 11, the first cooling mechanism 11 is positioned on the inner side of the push rod 4, and the distance E between the first cooling mechanism 11 and the upper end of the rear rim forming part 42 is 34mm. The upper die 1 is cup-shaped, the first cooling mechanism 11 is of a straight water cooling structure, and the first cooling mechanism 11 is arranged around the top of the upper die 1 in a circle and is provided with a water inlet and a water outlet (not shown in the figure).
As shown in fig. 1 and 2, an annular groove 5 is arranged in the inner cavity of the upper die 1 near the rear rim forming part 42, the annular groove 5 is located below the first cooling mechanism 11, the height a of the annular groove 5 is 30mm, the width B of the annular groove 5 is 8mm, the top of the annular groove 5 is similar to the top of the gradual-fit section 41, and the wall thickness C between the upper die 1 corresponding to the annular groove 5 and the rear rim forming part 42 is 15mm.
As shown in fig. 1 and 4, the side molds 2 are four-opening molds, each side mold 2 has a large ring portion 21 recessed inward, each large ring portion 21 is provided with a second cooling mechanism 22, wherein each second cooling mechanism 22 includes seven air inlet holes, the seven air inlet holes are uniformly arranged on each large ring portion 21, each air inlet hole faces the rear rim forming portion 42, four fans (not shown in the drawing) are arranged around the side mold 2, and each fan directly blows toward the seven air inlet holes. The wall thickness D between the side mold 2 and the rear rim forming portion 42 corresponding to the second cooling mechanism 22 is 15mm.
In the actual operation process, an operator assembles the upper die, the side die and the bottom die together, then aluminum liquid is introduced from the bottom die, the aluminum liquid gradually rises along the rim forming part and reaches the rear rim forming part, the aluminum liquid gradually rises in the rear rim forming part and gradually fills the gradual-mixing section, and impurities and oxides contained in the aluminum liquid are gradually accumulated in the gradual-mixing section because the density of the impurities and the oxides is smaller than that of the aluminum liquid; and then cooling through the first cooling mechanism and the second cooling mechanism, so that aluminum liquid of the whole rear rim forming part is gradually solidified, the gradual-closing section is solidified to form a machining allowance part of the rear rim, then the hub is subjected to demolding, an operator carries out turning on the machining allowance part of the rear rim, and the machining allowance part with poor mechanical property is removed, so that the rear rim with good mechanical property is reserved.
Claims (10)
1. The utility model provides an improve rim rear rim mechanical properties's passenger car wheel casting mould, includes mould, side form and die block, go up mould, side form and die block and enclose into wheel hub die cavity, its characterized in that: the upper end of the hub die cavity is provided with a rear rim forming part, the rear rim forming part is formed by enclosing an upper die and a side die, the rear rim forming part extends upwards and gradually closes to form a gradually-closing section, the thickness of the gradually-closing section gradually reduces from bottom to top, and the top of the upper die is provided with a first cooling mechanism.
2. The passenger car wheel casting mold for improving mechanical properties of a rim rear rim of claim 1, wherein: the position of the side die corresponding to the gradually-closing section is a vertical cylindrical surface, the position of the upper die corresponding to the gradually-closing section is an inclined surface, and the cylindrical surface and the inclined surface jointly form the gradually-closing section.
3. The passenger car wheel casting mold for improving mechanical properties of a rim rear rim of claim 2, wherein: the upper end of the inclined plane forms an arc-shaped chamfer.
4. A passenger car wheel casting mold for improving mechanical properties of a rim rear rim according to claim 3, wherein: and an annular groove is formed in the position, close to the rear rim forming part, of the inner cavity of the upper die.
5. The passenger car wheel casting mold for improving mechanical properties of a rim rear rim of claim 4, wherein: the annular groove is positioned below the first cooling mechanism, the height A of the annular groove is 29-31mm, and the width B of the annular groove is 7-9mm.
6. The passenger car wheel casting mold for improving mechanical properties of a rim rear rim of claim 5, wherein: the top of the annular groove is similar to the top of the gradual-closing section in height, and the wall thickness C between the upper die corresponding annular groove and the rear rim forming part is 14-16mm.
7. A passenger car wheel casting mould for improving mechanical properties of a rear rim according to any one of claims 1 to 6, wherein: the upper end of the upper die is provided with a push rod for ejecting the hub, and the first cooling mechanism is positioned at the inner side of the push rod.
8. The passenger car wheel casting mold for improving mechanical properties of a rim rear rim of claim 7, wherein: the first cooling mechanism is of a straight water cooling structure.
9. A passenger car wheel casting mould for improving mechanical properties of a rear rim according to any one of claims 1 to 6, wherein: the side dies are four-opening dies, each side die is provided with a large ring part recessed inwards, each large ring part is provided with a plurality of second cooling mechanisms, and the second cooling mechanisms are opposite to the rear rim forming part.
10. The passenger car wheel casting mold for improving mechanical properties of a rim rear rim of claim 9, wherein: the wall thickness D between the side mold corresponding to the second cooling mechanism and the rear rim forming part is 14-16mm, and the second cooling mechanism is an air cooling structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321094379.8U CN219648644U (en) | 2023-05-09 | 2023-05-09 | Passenger car wheel casting die for improving mechanical property of rim rear rim |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321094379.8U CN219648644U (en) | 2023-05-09 | 2023-05-09 | Passenger car wheel casting die for improving mechanical property of rim rear rim |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219648644U true CN219648644U (en) | 2023-09-08 |
Family
ID=87857500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321094379.8U Active CN219648644U (en) | 2023-05-09 | 2023-05-09 | Passenger car wheel casting die for improving mechanical property of rim rear rim |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219648644U (en) |
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2023
- 2023-05-09 CN CN202321094379.8U patent/CN219648644U/en active Active
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