Lower die for aluminum alloy wheel

Abstract

The utility model belongs to the technical field of wheel molds, and provides an aluminum alloy wheel lower mold which comprises a mold body, a back cavity is downwards formed in the side, close to an upper mold, of the mold body, and the side wall of the back cavity is of a flat circular structure. The back cavity wall is formed between the inner wall of the back cavity and the outer wall of the mold body, and a connecting assembly is arranged on the side, close to the upper mold, of the back cavity wall; the heat insulation assembly is arranged on the lower portion of the inner wall of the back cavity. According to the utility model, the wall thickness at the lug edge of the cast wheel is uniform, the wall thickness consistency is improved, the casting temperature field at the lug edge is improved through the arranged heat insulation component, meanwhile, the effect of turning the back cavity by using a lathe is realized, the processing efficiency is improved, and the processing cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheel molds, and particularly relates to a lower mold for aluminum alloy wheels. Background Art

[0002] At present, for the part of the lower die back cavity corresponding to the ear edge of the aluminum alloy wheel mold, as Figure 3 shown, it is designed as an island structure, which is convenient for setting the position of the lower die connection threaded holes. Using this structure can ensure the wall thickness uniformity of the wheel window position to the greatest extent, but there are obvious design defects in the ear edge position, and the overall wall thickness consistency cannot be achieved. As Figure 4 shown, at the island structure, the wall thickness corresponding to the ear edge position is 26 mm, and at the position without the island structure, the wall thickness corresponding to the ear edge position is 16 mm, with poor wall thickness uniformity. Moreover, the current island structure of the lower die needs to be machined by several milling operations, resulting in high processing efficiency and processing costs. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a lower mold for aluminum alloy wheels to solve the above problems and achieve the purpose of improving the wall thickness uniformity of the wheel ear edge and reducing the production difficulty of the lower mold.

[0004] To achieve the above purpose, the utility model provides the following scheme: A lower mold for aluminum alloy wheels, comprising:

[0005] A mold body, on the side of the mold body close to the upper mold, a back cavity is opened downward, and the side wall of the back cavity is a flat circular structure;

[0006] A back cavity wall, the inner wall of the back cavity and the outer wall of the mold body form the back cavity wall, and a connection component is arranged on the side of the back cavity wall close to the upper mold;

[0007] A heat insulation component, the heat insulation component is opened at the lower part of the inner wall of the back cavity.

[0008] Preferably, the heat insulation component includes an annular heat insulation groove, and the annular heat insulation groove is opened at the lower part of the inner wall of the back cavity.

[0009] Preferably, the connection component includes a plurality of screw holes, and the plurality of screw holes are opened downward at the top of the back cavity wall.

[0010] Preferably, there are five groups of the screw holes, and the five groups of screw holes are equally spaced on the top of the back cavity wall.

[0011] Preferably, the bottom edge of the back cavity is smoothly transitioned with the heat insulation groove, the bottom edges of the back cavity are in the same horizontal plane, and the bottom edges of the back cavity are circular.

[0012] Preferably, the inner wall of the back cavity and the heat insulation groove are formed by turning machining.

[0013] Compared with the prior art, the utility model has the following advantages and technical effects: The main function of the back cavity is to provide the space required for casting the wheel; by setting the inner wall of the back cavity as a flat circular structure and removing the island structure, it helps to achieve a uniform wall thickness at the ear edge; the main function of the back cavity wall is to provide a position for opening the connecting component to ensure the effective connection between the mold body and the adjacent structure; the main function of the heat insulation component is to ensure the casting field temperature at the ear edge position. Overall, by removing the island structure, the inner wall of the back cavity is made into a uniform circular structure, achieving a uniform wall thickness at the ear edge of the cast wheel, improving the wall thickness consistency. Moreover, the circular structure makes it possible to machine the heat insulation component at the bottom of the side wall of the back cavity. By setting the heat insulation component, the casting temperature field at the ear edge position is improved. At the same time, the effect of machining the back cavity by turning on a lathe is achieved, improving the processing efficiency and reducing the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a schematic diagram of the lower mold of the present utility model;

[0016] Figure 2 It is a cross-sectional view of the corresponding ear edge part of the lower mold of the present utility model;

[0017] Figure 3 It is a schematic diagram of the existing lower mold;

[0018] Figure 4 It is a cross-sectional view of the corresponding ear edge part of the existing lower mold;

[0019] Among them, 1. Mold body; 2. Screw hole; 3. Heat insulation groove; 4. Island structure; 5. Back cavity; 6. Back cavity wall. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0021] To make the above - mentioned objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Refer to Figure 1 - Figure 2 , the present utility model provides a lower die for an aluminum alloy wheel, including:

[0023] A die body 1, on the side of the die body 1 close to the upper die, a back cavity 5 is opened downward, and the side wall of the back cavity 5 is a flat circular structure;

[0024] A back - cavity wall 6 is formed between the inner wall of the back cavity 5 and the outer wall of the die body 1. A connection component is arranged on the side of the back - cavity wall 6 close to the upper die;

[0025] A heat - insulation component is arranged at the lower part of the inner wall of the back cavity 5.

[0026] The main function of the back cavity 5 is to provide the space required for casting the wheel; by setting the inner wall of the back cavity 5 as a flat circular structure, the island - like structure 4 is removed, which helps to achieve a uniform wall thickness at the ear edge; the main function of the back - cavity wall 6 is to provide a position for opening the connection component to ensure the effective connection between the die body 1 and the adjacent structure; the main function of the heat - insulation component is to ensure the casting field temperature at the ear edge position. Overall, by removing the island - like structure, the present utility model makes the inner wall of the back cavity a uniform circular structure, realizes the uniform wall thickness at the ear edge of the cast wheel, improves the wall - thickness consistency. Moreover, the circular structure makes it possible to machine the heat - insulation component at the bottom of the side wall of the back cavity. By setting the heat - insulation component, the casting temperature field at the ear edge position is improved. At the same time, the effect of machining the back cavity by turning on a lathe is realized, improving the processing efficiency and reducing the processing cost.

[0027] In a further optimized solution, the heat - insulation component includes an annular heat - insulation groove 3, and the annular heat - insulation groove 3 is opened at the lower part of the inner wall of the back cavity 5.

[0028] As Figure 1 and Figure 2 shown, since the side wall of the back cavity 5 is an integral circular structure, it is possible to machine the heat - insulation groove 3 at the corresponding position of the ear edge. The heat - insulation groove 3 can reduce the influence of the bottom area on the ear edge. By setting the integral back cavity 5 and the heat - insulation groove 3, both the casting temperature field at the ear edge position can be ensured and the wall - thickness consistency at this position can be achieved.

[0029] In a further optimized solution, the distance between the side wall of the heat - insulation groove 3 close to the back - cavity wall 6 and the back - cavity wall 6 is 30 cm.

[0030] In a further optimized solution, the connection component includes a plurality of screw holes 2, and the plurality of screw holes 2 are opened downward at the top of the back - cavity wall 6.

[0031] For a further optimized solution, five sets of screw holes 2 are provided, and the five sets of screw holes 2 are equally spaced and distributed at the top of the back cavity wall 6.

[0032] As Figure 1 shown, the back cavity wall 6 is appropriately thickened to provide a position for the opening of the screw holes 2, thus avoiding the existing lower mold from providing a position for the opening of the screw holes 2 by setting the island structure 4, and making it possible to cancel the island structure 4.

[0033] For a further optimized solution, the bottom edge of the back cavity 5 and the heat insulation groove 3 are in smooth transition, the bottom edges of the back cavity 5 are located in the same horizontal plane, and the bottom edges of the back cavity 5 are circular.

[0034] As Figure 2 shown, the bottom edges of the side walls of the back cavity 5 are controlled to be in the same horizontal plane during the processing, which is more conducive to achieving uniform wall thickness of the wheel flange.

[0035] For a further optimized solution, as Figure 2 shown, it is a cross-sectional view of the mold body 1 of an embodiment of the present utility model at the flange. In this embodiment, the wall thickness of the entire flange is uniformly 16 mm.

[0036] For a further optimized solution, the inner wall of the back cavity 5 and the heat insulation groove 3 are formed by turning.

[0037] As Figure 1 and Figure 3 shown, compared with the existing processing method of several milling for the lower mold of the wheel with the island structure 4, for the lower mold of the present utility model, by canceling the island structure 4, when processing the lower mold, the structure of the back cavity 5 can be directly turned on a lathe. At the same time, due to the absence of the island structure 4, the turning of the heat insulation groove 3 becomes possible, enabling the lower mold to be provided with the heat insulation groove 3 at the corresponding position of the flange. This can not only achieve the effect of uniform wall thickness at the position of the cast wheel flange, but also change the casting temperature field at the corresponding position of the flange, while reducing the manufacturing and processing difficulty of the lower mold, improving the processing efficiency and reducing the processing cost.

[0038] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0039] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A lower die for an aluminum alloy wheel, characterized in that: include: A mold body (1), wherein a back cavity (5) is downwardly opened on a side of the mold body (1) close to the upper mold, and a side wall of the back cavity (5) is a flat circular structure; a back cavity wall (6), the back cavity wall (6) being formed between the inner wall of the back cavity (5) and the outer wall of the mold body (1), and a connecting component being arranged on a side of the back cavity wall (6) close to the upper mold; A heat insulation component is provided at the lower part of the inner wall of the back cavity (5).

2. The lower die of an aluminum alloy wheel according to claim 1, characterized in that: The heat insulation component comprises an annular heat insulation groove (3), and the annular heat insulation groove (3) is opened at the lower part of the inner wall of the back cavity (5).

3. The lower die of an aluminum alloy wheel according to claim 1, characterized in that: The connection assembly comprises a plurality of screw holes (2), and the plurality of screw holes (2) are opened downwardly on the top of the back cavity wall (6).

4. The lower die of an aluminum alloy wheel according to claim 3, characterized in that: Five groups of screw holes (2) are provided, and the five groups of screw holes (2) are evenly spaced and distributed on the top of the back cavity wall (6).

5. The lower die of an aluminum alloy wheel according to claim 2, characterized in that: The bottom edge of the back cavity (5) smoothly transitions to the heat insulation groove (3), the bottom edge of the back cavity (5) is located in the same horizontal plane, and the bottom edge of the back cavity (5) is circular.

6. The lower die of an aluminum alloy wheel according to claim 2, characterized in that: The inner wall of the back cavity (5) and the heat insulation groove (3) are formed by turning.

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