A hub spinning die

Abstract

The utility model relates to hub manufacturing technical field, and disclose a kind of hub spinning die, it includes lower die holder and upper tail top, the rim of corresponding hub blank is provided with pusher on lower die holder and outer wheel lip junction, pusher is retractably connected lower die holder, for the support, tight of hub blank rim and outer wheel lip junction, retractable passageway is opened in radial direction on lower die holder, pusher sliding connection retractable passageway realizes the radial retraction of pusher.The utility model sets up the pusher of radial retraction connection lower die holder, so that the radial dimension of die corresponding hub blank rim and outer wheel lip junction is adjustable, while satisfying the tight support demand in the process of hub blank spinning operation, effectively avoid the problem of die interference demoulding, eliminate the problem of metal stream line of key stress part of cutting-off hub used in later turning processing to solve demoulding problem, ensure the safety and service life of product, and reduce the machining workload, improve operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub manufacturing technology, and in particular to a wheel hub spinning mold. Background Technology

[0002] With the rapid development of automotive lightweighting technology, magnesium alloys and aluminum alloys, due to their advantages such as low density, high specific strength, and aesthetic appeal, have become the mainstream materials for passenger car wheel manufacturing. However, compared to traditional steel alloys, magnesium and aluminum alloys differ significantly in their plastic deformation capabilities, a characteristic that places higher demands on the wheel spinning process. Currently, the traditional wheel rim spinning molds commonly used in the industry employ a solid spinning structure, meaning the mold and the wheel rim blank remain in complete contact during the spinning process. This process faces the following technical bottlenecks:

[0003] Demolding defects of reverse drawing die: The reverse drawing die structure at the connection between the rim and the outer lip cannot be effectively demolded during solid spinning due to die interference. Even if the reverse drawing die blank is forcibly spun out, it still faces the risk of demolding failure.

[0004] Metal flow line breakage problem: The post-demolding turning process used to solve the demolding problem cuts off the metal flow lines in the critical stress areas of the wheel hub, directly destroying the original continuous fibrous structure of the material. This flow line interruption will lead to a significant deterioration in the mechanical properties of the wheel hub (such as fatigue strength and impact resistance), seriously affecting product safety and service life.

[0005] Currently, there is a lack of solutions in the technology that can achieve efficient forming of inverted drawing die structures while fully preserving the integrity of the metal flow lines. Therefore, developing new spinning die structures to overcome this technical bottleneck is urgently needed to promote the advancement of magnesium-aluminum alloy wheel manufacturing technology. Utility Model Content

[0006] The purpose of this utility model is to address the above-mentioned problems by providing a wheel hub spinning die. The technical solution adopted by this utility model is as follows:

[0007] A wheel hub spinning die includes a lower die base for supporting a wheel hub blank and an upper tailstock for pressing the wheel hub blank. A pusher is provided on the lower die base at the connection between the rim and the outer lip of the wheel hub blank. The pusher is telescopically connected to the lower die base and is used to support and press the connection between the rim and the outer lip of the wheel hub blank. A telescopic channel is provided on the lower die base in the radial direction. The pusher is slidably connected to the telescopic channel to realize the radial extension and retraction of the pusher, thereby making the radial dimension of the lower die base at the connection between the rim and the outer lip of the wheel hub blank adjustable.

[0008] Preferably, the pusher includes a mold head that is molded to fit the connection between the wheel rim and the outer lip of the wheel hub blank, and a push rod that is fixedly connected to the mold head, wherein the push rod is slidably connected to the telescopic channel.

[0009] Preferably, the upper tail top is provided with an ejector mandrel for ejecting the ejector, the ejector mandrel is axially movably connected to the upper tail top, the lower mold base is provided with a center hole corresponding to the ejector mandrel, the ejector mandrel is inserted into the center hole and has axial freedom, the lower end of the ejector mandrel is provided with a wedge-shaped surface, and the tail end of the ejector extends into the center hole and is provided with a wedge-shaped surface corresponding to the ejector mandrel.

[0010] Preferably, a return spring is provided on the lower mold base corresponding to the ejector, and the ejector can automatically retract into its original position under the elastic force of the return spring.

[0011] Preferably, an ejector is detachably connected to the lower mold base, and the ejector is molded to conform to the shape of the back cavity of the wheel hub blank.

[0012] Preferably, the push rod of the ejector has a Z-shaped structure, and the telescopic channel is a Z-shaped bent structure formed by the ejector and the lower die base. The push rod of the Z-shaped structure is slidably connected to the telescopic channel of the bent structure, and the push rod of the Z-shaped structure has a certain degree of freedom of linear reciprocating motion within the telescopic channel of the bent structure.

[0013] Preferably, the ejector is provided with a positioning frustum corresponding to the center hole of the wheel hub blank, for center positioning of the wheel hub blank.

[0014] The beneficial effects of this utility model are as follows: By setting a pusher for the lower mold base with radial telescopic connection, the radial dimension of the mold corresponding to the connection between the wheel rim and the outer lip of the wheel hub blank is adjustable. This effectively avoids the problem of the mold interfering with the demolding of the wheel hub blank while meeting the clamping support requirements during the spinning process of the wheel hub blank. Furthermore, it eliminates the need for post-processing machining to cut off the metal flow lines of key stress-bearing parts of the wheel hub to solve the demolding problem, ensuring product safety and service life, reducing machining workload, and improving work efficiency. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 for Figure 1 Exploded view.

[0018] Figure 3 This is a schematic diagram of the ejector mechanism in this utility model.

[0019] Figure 4 for Figure 3 Top view.

[0020] In the diagram: 10--Lower mold base; 11--Telescopic channel; 12--Ejector; 13--Positioning frustum; 20--Upper tail ejector; 21--Ejector mandrel; 22--Wedge-shaped surface; 30--Connection between rim and outer lip; 40--Ejector; 41--Die head; 42--Ejector rod; 43--Reset spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] like Figure 1-4 As shown, a wheel hub spinning die includes a lower die base 10 for supporting a wheel hub blank and an upper tailstock 20 for pressing the wheel hub blank. A pusher 40 is provided on the lower die base 10 corresponding to the connection 30 between the wheel rim and the outer lip of the wheel hub blank. The pusher 40 is telescopically connected to the lower die base 10 and is used to support and press the connection 30 between the wheel rim and the outer lip of the wheel hub blank. Specifically, a telescopic channel 11 is radially formed on the lower die base 10, and the pusher 40 is slidably connected to the telescopic channel 11 to achieve radial telescopic extension and retraction of the pusher 40, thereby making the radial dimension of the lower die base 10 corresponding to the connection 30 between the wheel rim and the outer lip of the wheel hub blank adjustable. In use, the wheel hub blank is placed on the lower mold base 10. The press drives the upper tail ejector 20 to move downward and press the wheel hub blank firmly on the lower mold base 10. At this time, the ejector 40 is pushed out radially and pressed against the connection 30 between the rim and the outer wheel lip, so that the spinning operation of the wheel hub blank can be performed. When demolding, the ejector 40 is retracted radially to avoid the demolding space at the connection between the rim and the outer wheel lip, so as to avoid interfering with the smooth demolding of the wheel hub blank.

[0023] This embodiment, by setting a radially telescopic connection to the lower mold base 10, allows the radial dimension of the mold corresponding to the connection 30 between the wheel rim and the outer lip of the wheel hub blank to be adjustable. This effectively avoids the problem of the mold interfering with the demolding of the wheel hub blank while meeting the clamping support requirements during the wheel hub blank spinning process. Furthermore, it eliminates the need for post-processing machining to cut off the metal flow lines of key stress-bearing parts of the wheel hub to solve the demolding problem, ensuring product safety and service life, reducing machining workload, and improving operational efficiency.

[0024] As a preferred embodiment, such as Figure 3-4 As shown, the pusher 40 includes a mold head 41 formed to conform to the connection 30 between the wheel rim and the outer lip of the wheel hub blank, and a push rod 42 fixedly connected to the mold head 41. The push rod 42 is slidably connected to the telescopic channel 11. In use, the mold head 41 is pushed against or away from the wheel hub blank by the push rod 42, so that the mold head 41 fits tightly against the wheel hub blank, ensuring a firm and stable fit.

[0025] Preferably, the upper tail ejector 20 is provided with an ejector mandrel 21 for ejecting the ejector 40. The ejector mandrel 21 is axially movably connected to the upper tail ejector 20. The lower mold base 10 has a center hole corresponding to the ejector mandrel 21. The ejector mandrel 21 is inserted into the center hole and has axial freedom. The lower end of the ejector mandrel 21 has a wedge-shaped surface 22. The tail end of the ejector 40 extends into the center hole and is positioned corresponding to the wedge-shaped surface 22 of the ejector mandrel 21. In use, after the upper tail jack 20 presses the wheel hub blank, the press pushes the ejector mandrel 21 to continue downward. The wedge-shaped surface 22 of the ejector mandrel 21 contacts the tail end of the ejector 40, converting the axial displacement of the ejector mandrel 21 into the radial displacement of the ejector 40, so that the ejector 40 is pressed and supported at the connection 30 between the wheel hub blank rim and the outer wheel lip. During demolding, the upper tail jack 20 is lifted upward, driving the ejector mandrel 21 upward, so that the wedge-shaped surface 22 of the ejector mandrel 21 is separated from the tail end of the ejector 40, releasing the supporting effect on the ejector 40, so that the ejector 40 can retract freely to avoid interference during demolding.

[0026] Preferably, a return spring 43 is provided on the lower mold base 10 corresponding to the ejector 40, so that the ejector 40 can automatically retract into its original position under the elastic force of the return spring 43 to avoid demolding space.

[0027] Preferably, an ejector 12 is detachably connected to the lower mold base 10. The ejector 12 is custom-made to conform to the shape of the back cavity of the wheel hub blank, serving as a support component for the wheel hub blank. The detachable ejector 12 facilitates its disassembly and replacement, thereby meeting the usage requirements of different wheel types, eliminating the trouble of repeatedly manufacturing the lower mold base 10, and saving manufacturing costs.

[0028] Preferably, the push rod 42 of the ejector 40 has a Z-shaped structure, and the telescopic channel 11 is a Z-shaped bent structure formed by the ejector 12 and the lower mold base 10. The Z-shaped push rod 42 is slidably connected to the bent telescopic channel 11, and the Z-shaped push rod 42 has a certain degree of freedom of linear reciprocating motion within the bent telescopic channel 11. This embodiment facilitates the processing and assembly of the ejector 40 and the telescopic channel 11, further saving mold manufacturing costs.

[0029] Preferably, the ejector 12 is provided with a positioning frustum 13 corresponding to the center hole of the wheel hub blank. The positioning frustum 13 is used for center positioning of the wheel hub blank to improve positioning accuracy and ensure the spinning quality of the wheel hub blank.

[0030] The above-disclosed embodiments are merely specific examples of this utility model, but this utility model is not limited thereto. For those skilled in the art, any modifications made without departing from the principle of this utility model should be considered as protected by this utility model.

Claims

1. A hub spinning die, characterized by: The device includes a lower mold base (10) for supporting the wheel hub blank and an upper tail top (20) for pressing the wheel hub blank. A pusher (40) is provided on the lower mold base (10) at the connection point (30) between the wheel rim and the outer wheel lip of the wheel hub blank. The pusher (40) is telescopically connected to the lower mold base (10) and is used to support and press the connection point (30) between the wheel rim and the outer wheel lip of the wheel hub blank. A telescopic channel (11) is provided on the lower mold base (10) along the radial direction. The pusher (40) is slidably connected to the telescopic channel (11) to realize the radial extension and retraction of the pusher (40), thereby making the radial dimension of the lower mold base (10) corresponding to the connection point (30) between the wheel rim and the outer wheel lip of the wheel hub blank adjustable.

2. The wheel hub spinning die according to claim 1, characterized in that: The pusher (40) includes a mold head (41) that is molded to fit the connection between the wheel rim and the outer wheel lip (30) of the wheel hub blank, and a push rod (42) that is fixedly connected to the mold head (41). The push rod (42) is slidably connected to the telescopic channel (11).

3. The wheel hub spinning die according to claim 1, characterized in that: The upper tail top (20) is provided with an ejector mandrel (21) for ejecting the ejector (40). The ejector mandrel (21) is axially movably connected to the upper tail top (20). The lower mold base (10) is provided with a center hole corresponding to the ejector mandrel (21). The ejector mandrel (21) is inserted into the center hole and has axial freedom. The lower end of the ejector mandrel (21) is provided with a wedge-shaped surface (22). The tail end of the ejector (40) extends into the center hole and is provided with a wedge-shaped surface (22) corresponding to the ejector mandrel (21).

4. The wheel hub spinning die according to claim 1, characterized in that: A return spring (43) is provided on the lower mold base (10) corresponding to the pusher (40). The pusher (40) can automatically retract into its original position under the elastic force of the return spring (43).

5. A wheel hub spinning die according to claim 2, characterized in that: The lower mold base (10) is detachably connected to an ejector (12), which is made to conform to the shape of the back cavity of the wheel hub blank.

6. A wheel hub spinning die according to claim 5, characterized in that: The push rod (42) of the ejector (40) has a Z-shaped structure. The telescopic channel (11) is a Z-shaped bent structure formed by the ejector (12) and the lower mold base (10). The push rod (42) of the Z-shaped structure is slidably connected to the telescopic channel (11) of the bent structure. The push rod (42) of the Z-shaped structure has a certain degree of freedom of linear reciprocating motion in the telescopic channel (11) of the bent structure.

7. A wheel hub spinning die according to claim 5, characterized in that: The top feeder (12) is provided with a positioning frustum (13) corresponding to the center hole of the wheel hub blank, which is used for center positioning of the wheel hub blank.

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