Die structure capable of avoiding deformation of hub aluminum profile

Abstract

The utility model discloses a die structure capable of avoiding hub aluminum profile deformation, which comprises an upper die and a lower die which are buckled up and down, a male head of the upper die penetrates through a flow guide cavity and is sleeved in a female hole of the lower die, the male head comprises a plurality of forming blocks which are arranged at intervals in the circumferential direction, a central round hole is enclosed in the middle of each forming block, and a rib notch is arranged between every two adjacent forming blocks; the middle feeding hole of the upper die is communicated with the central circular hole, and a blocking step is arranged between the middle feeding hole and the central circular hole, so that the aperture of the middle feeding hole is larger than that of the central circular hole; all the peripheral side feeding holes of the upper die are distributed at intervals in the circumferential direction and are communicated with the flow guide cavity, and all the peripheral side feeding holes are located in the radial outer sides of all the rib notches in a one-to-one correspondence mode; a circle of blocking ring is arranged on the edge of the upper end of the lower die female hole in the flow guide cavity in an upward protruding mode. Therefore, the blocking step is arranged, the metal flow speed can be slowed down, and it is ensured that the diameter of the inner cylinder and the thickness of the connecting ribs meet requirements; and the blocking ring is arranged, so that the formed connecting rib is sufficient in thickness and not prone to deformation.

Description

Technical Field

[0001] The utility model relates to a die for aluminum profiles, in particular to a die structure for avoiding the deformation of hub aluminum profiles. Background Art

[0002] Aluminum profiles refer to aluminum alloy profiles, which have good properties and are now widely used in various fields. As Figure 1 shown, a structure of a hub aluminum profile 10 is provided, which includes an inner cylinder 101 and an outer ring 102 sleeved inside and outside, and connecting ribs 103 that are circumferentially spaced and connected between the inner cylinder 101 and the outer ring 102. However, when the existing die is used to produce this profile aluminum profile, in the finally extruded product, there are defects such as insufficient diameter of the inner cylinder 101 and insufficient wall thickness of the connecting ribs 103, which are prone to deformation and cannot meet the customer's requirements. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a die structure for avoiding the deformation of hub aluminum profiles.

[0004] To achieve the above purpose, the solution of the utility model is:

[0005] A die structure for avoiding the deformation of hub aluminum profiles includes an upper die and a lower die, and the upper die and the lower die are buckled together; a male head protrudes downward at the lower end of the upper die, a female hole penetrating up and down is provided on the lower die, a diversion cavity is formed between the upper die and the lower die, and the male head passes through the diversion cavity and is sleeved in the female hole;

[0006] The male head includes a plurality of forming blocks circumferentially spaced, a central circular hole is surrounded in the middle of each forming block, and there are rib slot openings radially connecting the diversion cavity and the central circular hole between the circumferentially adjacent forming blocks, and the number of rib slot openings corresponds to the number of connecting ribs of the profile aluminum profile;

[0007] An intermediate feed hole penetrating up and down is provided at the upper end of the upper die, and a plurality of circumferential feed holes penetrating up and down are provided around the intermediate feed hole; the intermediate feed hole communicates with the central circular hole, and there is an obstructive step between the intermediate feed hole and the central circular hole, so that the aperture of the intermediate feed hole is larger than the aperture of the central circular hole; the circumferential feed holes are circumferentially spaced and communicate with the diversion cavity, and each circumferential feed hole is respectively located radially outside each rib slot opening;

[0008] An obstructive ring protrudes upward at the upper end edge of the female hole of the lower die in the diversion cavity.

[0009] Further, the outer wall of the obstructive ring is an inclined surface that slopes outward downward.

[0010] Further, a second blocking step is provided in the central circular hole, such that the aperture of the central circular hole above the second blocking step is larger than the aperture of the central circular hole below the second blocking step.

[0011] Further, the intermediate feed hole includes a cylindrical hole in the upper section and a conical hole in the lower section, and the diameter of the lower end of the conical hole gradually decreases.

[0012] Further, an arc-shaped inclined surface is provided at the outer edge of the top of the rib slot, and the arc-shaped inclined surface enables the top of the rib slot to be smoothly connected to the lower opening of the corresponding circumferential feed hole.

[0013] Further, the number of both the rib slots and the circumferential feed holes is seven, and they are respectively evenly spaced in the circumferential direction.

[0014] After adopting the above technical solution, during the production process of the aluminum alloy wheel hub profile product, the metal material enters the central circular hole and the diversion cavity through the respective feed holes at the upper end of the upper die, and forms an inner cylinder after flowing out from the central circular hole, forms connecting rib strips after flowing out from the respective rib slots, and forms an outer ring after flowing out from the gap between the male head and the female hole; moreover, by providing the blocking step, the metal flow rate in the central circular hole can be slowed down to ensure that the diameter of the formed inner cylinder and the thickness of the connecting rib strips meet the requirements; at the same time, by providing the blocking ring, the metal flow rate in the gap between the male head and the female hole can be slowed down, and the metal can flow more from the diversion cavity to the rib slots, further ensuring that the thickness of the formed connecting rib strips is sufficient and not easily deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional schematic diagram of the aluminum alloy wheel hub profile product;

[0016] Figure 2 is a three-dimensional view of an embodiment of the present invention;

[0017] Figure 3 is an exploded view (one) of an embodiment of the present invention;

[0018] Figure 4 is an exploded view (two) of an embodiment of the present invention;

[0019] Figure 5 is a bottom view of an embodiment of the present invention;

[0020] Figure 6 is Figure 5 a cross-sectional view taken along line A-A of

[0021] Figure 7 is Figure 6 a three-dimensional cross-sectional view of

[0022] Reference numeral description: Aluminum alloy wheel hub profile 10, inner cylinder 101, outer ring 102, connecting rib strip 103;

[0023] Upper die 1, male head 11, forming block 111, central circular hole 112, rib slot 113, arc-shaped inclined surface 114, intermediate feeding hole 12, cylindrical hole 121, conical hole 122, circumferential side feeding hole 13, blocking step 14, second blocking step 15;

[0024] Lower die 2, female hole 21, blocking ring 22, outer ring wall 221;

[0025] Flow guiding cavity 3. Specific implementation mode

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0027] As Figures 2 to 7 shown, a die structure for preventing deformation of a hub aluminum profile in this embodiment includes an upper die 1 and a lower die 2, and the upper die 1 and the lower die 2 are buckled together; a male head 11 protrudes downward from the lower end of the upper die 1, and a female hole 21 that penetrates up and down is provided on the lower die 2. A flow guiding cavity 3 is formed between the upper die 1 and the lower die 2, and the male head 11 passes through the flow guiding cavity 3 and is sleeved in the female hole 21.

[0028] Specifically as Figure 4 、 Figure 6 and Figure 7 , the male head 11 includes a plurality of forming blocks 111 arranged at intervals in the circumferential direction. A central circular hole 112 is surrounded in the middle of each forming block 111. There is a rib slot 113 that radially communicates the flow guiding cavity 3 and the central circular hole 112 between circumferentially adjacent forming blocks 111. The number of rib slots 113 corresponds to the number of connecting ribs 103 of the profile aluminum profile 10 (see Figure 1 ). In this embodiment, the number of rib slots 113 is taken as seven as an example, and they are evenly distributed at intervals in the circumferential direction.

[0029] The upper end of the upper die 1 is provided with a middle feed hole 12 that penetrates up and down, and several circumferential feed holes 13 that penetrate up and down are arranged around the middle feed hole 12; the middle feed hole 12 communicates with the central circular hole 112, and there is a blocking step 14 between the middle feed hole 12 and the central circular hole 112, so that the diameter of the middle feed hole 12 is larger than the diameter of the central circular hole 112; the circumferential feed holes 13 are distributed at circumferential intervals and communicate with the diversion cavity 3, and each circumferential feed hole 13 is respectively located radially outside each rib slot 113; in this embodiment, the number of circumferential feed holes 13 corresponds to the number of rib slots 113 and is seven, and they are also evenly distributed at circumferential intervals.

[0030] And referring to Figure 3 , an obstructive ring 22 is protruded upward around the upper end edge of the female hole 21 of the lower die 2 in the diversion cavity 3.

[0031] Thereby, during the production process of the hub aluminum profile product, the metal material enters the central circular hole 112 and the diversion cavity 3 from each feed hole at the upper end of the upper die 1, and flows out from the central circular hole 112 to form the inner cylinder 101, flows out from each rib slot 113 to form the connecting rib 103, and flows out from the gap between the male head 11 and the female hole 21 to form the outer ring 102; and, by setting the blocking step 14, the metal flow rate in the central circular hole 112 can be slowed down to ensure that the diameter of the formed inner cylinder 101 and the thickness of the connecting rib 103 meet the requirements; at the same time, by setting the obstructive ring 22, the metal flow rate in the gap between the male head 11 and the female hole 21 can be slowed down, and the metal can flow from the diversion cavity 3 to the rib slot 113 more, further ensuring that the thickness of the formed connecting rib 103 is sufficient and not easily deformed.

[0032] Such as Figure 6 , the outer ring wall 221 of the obstructive ring 22 is an inclined surface that slopes outward downward. To strengthen the strength of the obstructive ring 22 and improve the service life of the mold.

[0033] Such as Figure 6 , a second blocking step 15 is further provided in the central circular hole 112, so that the diameter of the central circular hole 112 above the second blocking step 15 is larger than the diameter of the central circular hole 112 below the second blocking step 15. By setting the second blocking step 15, to further ensure that the forming diameter of the inner cylinder 101 meets the requirements.

[0034] Such as Figure 6 , the middle feed hole 12 includes a cylindrical hole 121 in the upper section and a conical hole 122 in the lower section, and the diameter of the lower end of the conical hole 122 gradually decreases. The function is also to slow down the metal flow rate and ensure that the forming diameter of the inner cylinder 101 meets the requirements.

[0035] Such as Figure 4 、 Figure 6 AndFigure 7 , an arc-shaped inclined surface 114 is provided at the outer edge of the top of the rib slot 113. The arc-shaped inclined surface 114 enables the top of the rib slot 113 to be smoothly connected to the lower opening of the corresponding peripheral feed hole 13 on the side. So that the metal in the peripheral feed hole 13 can smoothly flow into the rib slot 113, further ensuring that the wall thickness of the formed connecting rib 103 is sufficient.

[0036] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. Any technical solution falling within the idea of the present invention belongs to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, any equivalent changes and modifications made without departing from the principle of the present invention should still fall within the protection scope of the present invention.

[0037] In the description of the embodiments of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, 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 therefore should not be construed as a limitation to the present application. In the description of the present application, "a plurality" and "several" mean two or more, unless otherwise specifically defined.

Claims

1. A mold structure for preventing wheel hub aluminum profile from being deformed, comprising an upper mold and a lower mold, wherein the upper mold and the lower mold are buckled together; a male head protrudes downward from the lower end of the upper mold, and a female hole is provided on the lower mold that passes through the upper and lower molds, and a flow guide cavity is formed between the upper mold and the lower mold, and the male head passes through the flow guide cavity and is sleeved in the female hole; the characteristics are: The male head comprises a plurality of circumferentially spaced forming blocks, each forming block surrounds a central circular hole in the middle, and circumferentially adjacent forming blocks are provided with rib notches radially connecting the guide cavity and the central circular hole, and the number of rib notches corresponds to the number of connecting ribs of the profile aluminum profile; The upper end of the upper die is provided with a middle feed hole which passes through from top to bottom, and a plurality of circumferential feed holes which pass through from top to bottom are provided around the middle feed hole; the middle feed hole is connected to the central circular hole, and there is an obstruction step between the middle feed hole and the central circular hole, so that the aperture of the middle feed hole is larger than the aperture of the central circular hole; the circumferential feed holes are distributed at intervals in the circumferential direction and connected to the guide cavity, and the circumferential feed holes are respectively located on the radial outer sides of the rib notches in a one-to-one correspondence; The upper end edge of the lower die mother hole in the guide cavity protrudes upward and is provided with a circle of obstruction ring.

2. The mold structure for preventing wheel hub aluminum profile from deforming according to claim 1, characterized in that: The outer ring wall of the obstruction ring is a slope with a lower end inclined outwards.

3. The mold structure for preventing wheel hub aluminum profile from deforming according to claim 1, characterized in that: A second obstruction step is also provided in the central circular hole, so that the aperture of the central circular hole above the second obstruction step is larger than the aperture of the central circular hole below the second obstruction step.

4. The mold structure for preventing wheel hub aluminum profile from deforming according to claim 1, characterized in that: The middle feed hole comprises a cylindrical hole in an upper section and a conical hole in a lower section, and the diameter of the lower end of the conical hole gradually decreases.

5. The mold structure for preventing wheel hub aluminum profile from deforming according to claim 1, characterized in that: The top outer edge of the rib slot is provided with an arc-shaped inclined surface, and the arc-shaped inclined surface enables the top of the rib slot and the corresponding lower opening of the peripheral side feed hole to be smoothly connected with each other.

6. The mold structure for preventing wheel hub aluminum profile from deforming according to claim 1, characterized in that: The number of the rib notches and the peripheral side feed holes is seven, and they are evenly distributed at intervals in the circumferential direction.

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