Aluminum alloy hub casting mold

Abstract

The utility model belongs to the technical field of hub dies, and particularly relates to an aluminum alloy hub casting die which comprises a lower die and an upper die which are matched with each other, the top of the lower die is matched with the bottom of the upper die to form a spoke cavity for casting a hub, the spoke cavity comprises a plurality of spoke cavities, and the aluminum alloy hub casting die further comprises a plurality of inserts. The inserts are detachably connected with the lower die and the upper die, the lower die and the upper die are provided with mounting cavities for mounting the inserts in each spoke cavity, the mounting cavities are arranged at the junctions of spokes and rims of hubs, the inserts are used for absorbing the temperature of molten metal, the cooling speed of the parts is increased, and the cooling time difference with other parts is shortened; and the shrinkage speed of the molten metal in the spoke cavity is increased, and the molten metal is shrunk in advance compared with the prior art, so that the problem of loose structure of the thick-wall part of the spoke is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheel hub moulds, and in particular relates to an aluminum alloy wheel hub casting mould. Background Art

[0002] A wheel hub primarily consists of the rim, spokes, and center hub. Wheel hub molds are generally divided into low-pressure casting and gravity casting methods. Gravity casting relies primarily on the principle of sequential solidification, feeding shrinkage in the order of cooling. The molten metal shrinks significantly during the cooling and solidification process. To prevent shrinkage and surface depressions within the casting, risers are installed on the hub for shrinkage feeding. To ensure adequate shrinkage feeding and minimize internal defects, a full ring riser is typically added to the rim, along with a gate in the center of the hub (at the mounting plate). Even so, the thick spoke wall still exhibits significant porosity due to slow cooling. Consequently, an improved aluminum alloy wheel hub casting mold has been designed. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides an aluminum alloy wheel hub casting mold to solve the problems in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A casting mold for an aluminum alloy wheel hub comprises a lower mold and an upper mold that cooperate with each other. The top of the lower mold and the bottom of the upper mold cooperate to form a spoke cavity for the cast wheel hub. The spoke cavity comprises a plurality of spoke cavities and a plurality of inserts. The inserts are detachably connected to the lower mold and the upper mold. The lower mold and the upper mold each have an installation cavity for installing an insert. The installation cavity is arranged at the junction of the spokes and the rim of the wheel hub.

[0006] Furthermore, it also includes a riser ring with multiple protrusions and an outer slider forming a rim. The multiple protrusions are connected in an annular array to the outer circumference of the riser ring. The lower mold, upper mold, outer slider and the riser ring cooperate to form a hub cavity, and the hub cavity includes a rim cavity, a spoke cavity and a middle hub cavity.

[0007] Furthermore, the insert includes a base and a raised portion, the raised portion is connected to the center of the base, and the raised portion can extend into the installation cavity accordingly.

[0008] Furthermore, the lower mold and the upper mold are provided with connection holes on the outer periphery of the installation cavity, and a corresponding connection part is provided on the outer side of the base, and the connection hole is opened on the connection part.

[0009] Furthermore, a cooling cavity is provided on the lower mold and the upper mold, and the cooling cavity is provided between the two spoke cavities.

[0010] Furthermore, the insert is made of metal.

[0011] Compared with the prior art, the present invention has the following beneficial effects: by arranging a plurality of installation cavities for installing inserts at the spoke cavity formed by the lower mold and the upper mold, the inserts are used to absorb the temperature of the molten metal, thereby accelerating the cooling speed of this part, shortening the time difference in cooling with other parts, and accelerating the shrinkage speed of the molten metal in the spoke cavity, which will shrink earlier than before, thereby solving the problem of loose tissue in the thick-walled part of the spoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a three-dimensional structural diagram of an aluminum alloy wheel hub casting mold of the present utility model;

[0013] Figure 2 This is a schematic diagram of the three-dimensional structure of the lower mold in an embodiment of an aluminum alloy wheel hub casting mold of the present invention (viewing angle 1);

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure of the lower mold in an embodiment of an aluminum alloy wheel hub casting mold of the present invention (viewing angle 2);

[0015] Figure 4 This is a schematic diagram of the three-dimensional structure of an insert in an embodiment of an aluminum alloy wheel hub casting mold of the present invention (viewing angle 1);

[0016] Figure 5 This is a schematic diagram of the three-dimensional structure of the insert in an embodiment of an aluminum alloy wheel hub casting mold of the present invention (viewing angle 2);

[0017] The reference numerals in the drawings of the specification include:

[0018] A lower mold (1), a mounting cavity (11), a connecting hole (111), a cooling cavity (12), an upper mold (2), a riser ring (3), a convex block (4), an insert (5), a raised portion (51), a base (52), a connecting portion (521), and a cooling cavity (53). DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0020] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0021] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] In the description of this utility model, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0023] Example 1:

[0024] like Figure 1-5 Specifically, the present invention provides an aluminum alloy wheel hub casting mold, comprising a lower mold 1 and an upper mold 2 that cooperate with each other. The top of the lower mold 1 and the bottom of the upper mold 2 cooperate to form a spoke cavity for casting the wheel hub. The spoke cavity includes a plurality of spoke cavities and a plurality of inserts 5. The inserts 5 are detachably connected to the lower mold 1 and the upper mold 2. The lower mold 1 and the upper mold 2 define an installation cavity 11 in each spoke cavity for installing an insert 5. The installation cavity 11 is provided at the junction of the spoke and the rim of the wheel hub. In the prior art, the molten metal enters the hub cavity. Due to the structural requirements of the hub, the wall thickness of each part is uneven. Some parts are very thick and cool slowly during the cooling process, while the parts with thin walls cool quickly, resulting in uneven cooling speeds in different parts of the same casting. As a result, shrinkage cavities may be generated or the thin-walled parts may be torn. In the actual production process, this phenomenon is more serious in the spoke part of the hub part. In order to avoid this phenomenon, after adopting this structure, a number of installation cavities 11 for installing inserts 5 are set at the spoke cavity formed by the lower mold 1 and the upper mold 2. The inserts 5 are used to absorb the temperature of the molten metal, accelerate the cooling speed of this part, shorten the time difference with other parts of the cooling, and the shrinkage speed of the molten metal in the spoke cavity is accelerated. It will shrink earlier than before, thereby solving the problem of loose tissue in the thick-walled part of the spoke.

[0025] The assembly also includes a riser ring 3 with multiple bumps 4 and an outer slider that forms the rim. The bumps 4 are connected in an annular array around the outer circumference of the riser ring 3. The lower die 1, upper die 2, outer slider, and riser ring 3 cooperate to form a hub cavity, which includes a rim cavity, a spoke cavity, and a center hub cavity. In actual production, the spoke portion is most prone to looseness at the junction of the spoke and the rim, so placing the insert 5 there achieves better results.

[0026] The insert 5 includes a base 52 and a raised portion 51 . The raised portion 51 is connected to the center of the base 52 , and the raised portion 51 can extend into the installation cavity 11 accordingly.

[0027] The lower mold 1 and the upper mold 2 are provided with connecting holes 111 on the periphery of the installation cavity 11 , and a corresponding connecting portion 521 is provided on the outer side of the base 52 , and a connecting hole is opened on the connecting portion 521 .

[0028] A cooling cavity 12 is also provided on the lower mold 1 and the upper mold 2, and the cooling cavity 12 is arranged between the two spoke cavities. The insert 5 is made of metal. The specific insert 5 is made of metal material because metal has good thermal conductivity. The raised portion 51 of the insert 5 is in contact with the spoke cavities on the lower mold 1 and the upper mold 2. The surface of the raised portion 51 is directly the molding part of the product. The interior of the insert 5 is also provided with a cooling cavity 53 that can pass cooling medium gas or water to dissipate heat, which can further accelerate the cooling speed of the spoke part, so that the looseness phenomenon is better alleviated, and at the same time further shorten the production cycle of the hub part. The base 52 of the insert 5 and the mold are correspondingly provided with connecting holes for easy assembly.

[0029] The above are only embodiments of the present invention, and the circuits, electronic components and modules involved are all prior art, which can be fully implemented by those skilled in the art. It is needless to say that the content protected by this application does not involve improvements to software and methods. Common knowledge such as the specific structures and characteristics known in the scheme are not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field to which the utility model belongs before the application date or priority date, can obtain all prior art in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme based on their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, several variations and improvements can be made, which should also be regarded as the scope of protection of the utility model. These will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. An aluminum alloy wheel hub casting mold, characterized by: The invention comprises a lower die (1) and an upper die (2) which cooperate with each other, wherein the top of the lower die (1) and the bottom of the upper die (2) cooperate to form a spoke cavity of a casting wheel hub, wherein the spoke cavity comprises a plurality of spoke cavities and a plurality of inserts (5), wherein the inserts (5) are detachably connected to the lower die (1) and the upper die (2), and an installation cavity (11) for installing an insert (5) is provided in each spoke cavity of the lower die (1) and the upper die (2), and the installation cavity (11) is arranged at the junction of the spokes and the rim of the wheel hub.

2. The aluminum alloy wheel hub casting mold according to claim 1, characterized in that: The invention also includes a riser ring (3) having a plurality of protrusions (4) and an outer slider forming a rim, wherein the plurality of protrusions (4) are connected in an annular array to the outer periphery of the riser ring (3), and the lower mold (1), the upper mold (2), the outer slider and the riser ring (3) cooperate to form a hub cavity, wherein the hub cavity includes a rim cavity, a spoke cavity and a center hub cavity.

3. The aluminum alloy wheel hub casting mold according to claim 1, characterized in that: The insert (5) comprises a base (52) and a raised portion (51), wherein the raised portion (51) is connected to the center of the base (52), and the raised portion (51) can extend into the installation cavity (11) accordingly.

4. The aluminum alloy wheel hub casting mold according to claim 3, characterized in that: The lower mold (1) and the upper mold (2) are provided with connection holes (111) on the outer periphery of the installation cavity (11), and a corresponding connection portion (521) is provided on the outer side of the base (52), and the connection portion (521) is provided with a connection hole.

5. The aluminum alloy wheel hub casting mold according to claim 1, characterized in that: A cooling cavity (12) is also provided on the lower mold (1) and the upper mold (2), and the cooling cavity (12) is arranged between the two spoke cavities.

6. The aluminum alloy wheel hub casting mold according to claim 4, characterized in that: The insert (5) is made of metal.

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