Hub circle pressing die

Abstract

The utility model relates to a hub rounding die which comprises a die pressing mandrel which is fixedly arranged, an upper die and a lower die, the upper die and the lower die are arranged above and below the die pressing mandrel respectively, the axis of the die pressing mandrel is horizontally arranged, and the upper die is of an arc-shaped structure with an opening facing downwards and directly facing the die pressing mandrel. The lower die is of an arc-shaped structure with an upward opening right facing the die pressing mandrel, and the upper die and the lower die are driven by independent driving devices to ascend and descend respectively and can be combined into a circle around the peripheral side of the die pressing mandrel in an embracing mode, and the two ends of the lower die are each provided with a rolling shaft. And the peripheral contour of the rolling shaft is connected with the concave contour of the lower die to form an arc-shaped combined surface matched with the lower half excircle surface of the die pressing mandrel. According to the utility model, the number of equipment required in the hub rounding manufacturing process is reduced, and the production efficiency is improved. And by arranging the rolling shafts, sliding friction between the plane steel plate and the end of the lower die can be converted into rolling friction, and the plane steel plate is prevented from being damaged by friction in the pressing process.

Description

Technical Field

[0001] This utility model relates to wheel manufacturing technology, specifically to a wheel hub pressing mold. Background Technology

[0002] Wheels are crucial automotive components, formed by welding spokes and rims. The rims are typically manufactured by rolling flat steel plates into a circle, followed by pressing and re-rounding processes. This existing technology requires multiple machines, resulting in a lengthy, inefficient, and costly manufacturing process. Furthermore, during the pressing process in this technology, the end of the pressing die easily rubs against the steel plate, affecting product quality. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a wheel hub rounding mold that can quickly round flat steel plates.

[0004] This utility model is achieved using the following technical solution:

[0005] This utility model proposes a wheel hub pressing die, including a fixed pressing mandrel and an upper die and a lower die respectively disposed above and below the pressing mandrel. The axis of the pressing mandrel is horizontally arranged. The upper die is an arc-shaped structure with its opening facing downwards and directly opposite the pressing mandrel, and the lower die is an arc-shaped structure with its opening facing upwards and directly opposite the pressing mandrel. The upper die and the lower die are driven to rise and fall by independent driving devices and can hug the circumference of the pressing mandrel to form a circle. A roller is provided at each end of the lower die. The outer circumference of the roller connects with the inner concave contour of the lower die to form an arc-shaped combination surface that matches the lower half of the outer circular surface of the pressing mandrel.

[0006] Preferably, the inner sides of both ends of the upper mold are provided with inclined guide surfaces that gradually expand outward, and the inclined guide surfaces are connected to the concave contour of the upper mold.

[0007] Preferably, a bearing is provided at each end of the lower mold, and the roller is connected to the bearing so as to be rotatably connected to the lower mold.

[0008] Preferably, the two ends of the lower mold are configured to be of equal height to form a platform for placing flat materials.

[0009] Preferably, the device further includes a material ejection mechanism, which is located on the outer periphery of the molding mandrel and has a horizontal material ejection push stroke.

[0010] Preferably, the ejection mechanism is a push plate that surrounds the outer periphery of the molding mandrel.

[0011] This invention offers the following advantages: It utilizes a segmented molding process to create the lower and upper arc structures of the wheel hub, combining the rolling and pressing processes into one. Furthermore, the mold can also be used for the re-rounding process, reducing the number of equipment required in the wheel hub pressing process and improving production efficiency. By incorporating rollers, the sliding friction between the flat steel plate and the lower mold end is converted into rolling friction, preventing frictional damage to the flat steel plate during the pressing process. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the first stage of the wheel hub pressing die molding in the embodiment;

[0013] Figure 2 This is a schematic diagram of the second stage of the wheel hub pressing die in the embodiment;

[0014] Figure 3 This is a schematic diagram of the third stage of the wheel hub pressing mold in the embodiment. Detailed Implementation

[0015] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0017] See Figure 1-3 As shown, in a preferred embodiment of this utility model, a wheel hub pressing die is provided, including a fixedly mounted pressing mandrel 1 and an upper die 2 and a lower die 3 respectively disposed above and below the pressing mandrel 1. The axis of the pressing mandrel 1 is horizontally arranged. The upper die 2 is an arc-shaped structure with its opening facing downwards and directly opposite the pressing mandrel 1, and the lower die 3 is an arc-shaped structure with its opening facing upwards and directly opposite the pressing mandrel 1. The upper die 2 and the lower die 3 are driven to rise and fall by independent driving devices and can be able to hug the circumference of the pressing mandrel 1 to form a circle. The driving device can be a cylinder, a hydraulic cylinder, a motor, etc. (See also...) Figure 1 , Figure 2 , Figure 3The workflow of the wheel hub rounding die is as follows: First, the upper die 2 and the lower die 3 are controlled to move away from each other, causing the die to open. Then, the flat steel plate 100 is placed on the lower die 3. Next, the lower die 3 is driven to move upward, so that the flat steel plate 100 is molded into a "U" shape between the molding mandrel 1 and the lower die 3. Then, the upper die 2 is driven to move downward, so that the flat steel plate 100 is completely pressed into a circle between the upper die 2, the lower die 3, and the molding mandrel 1. This segmented molding process produces the lower and upper arc structures of the wheel hub, combining the rolling and pressing processes into one. Moreover, this die can also be used for the re-rounding process, reducing the number of equipment required in the wheel hub rounding manufacturing process and improving production efficiency. It should be noted that the upper mold 2 and the lower mold 3 are driven separately. If the flat steel plate 100 is not aligned when placed on the lower mold 3, for example, if the left side of the flat steel plate 100 extends longer than the right side of the lower mold 3, the left side of the flat steel plate 100 may touch the upper mold 2 during the molding process of the molding mandrel 1 and the lower mold 3. However, since the upper mold 2 can be driven independently, it is only necessary to control the upper mold 2 to rise to continue the molding operation. In other words, the positional accuracy requirement for the flat steel plate 100 placed on the lower mold 3 is not high.

[0018] Furthermore, a roller 31 is provided at each end of the lower mold 3. During the pressing of the flat steel plate 100 between the lower mold 3 and the molding mandrel 1, the flat steel plate 100 will inevitably rub against the two ends of the lower mold 3, which may wear down the surface of the flat steel plate 100. In this embodiment, the roller 31 can convert the sliding friction between the flat steel plate 100 and the ends of the lower mold 3 into rolling friction, avoiding friction damage to the flat steel plate 100 during the pressing process. At the same time, the outer periphery of the roller 31 connects with the inner concave contour 30 of the lower mold to form an arc-shaped combination surface that matches the lower half of the outer circular surface of the molding mandrel 1. Therefore, the overall arc-shaped molding surface of the lower mold 3 will not be affected. In this embodiment, a bearing is provided at each end of the lower mold 3, and the roller 31 is connected to the bearing so as to be rotatably connected to the lower mold 3.

[0019] In this embodiment, the two arc-shaped ends of the lower mold 3 are configured to be of equal height to form a platform for placing the flat steel plate 100. The inner sides of both ends of the upper mold 2 are provided with gradually expanding outward inclined guide surfaces 21. The inclined guide surfaces 21 connect with the concave contour 20 of the upper mold. The inclined guide surfaces 21 are more conducive to guiding the flat steel plate 100 during the pressing process between the upper mold 2 and the molding mandrel 1. Figure 2 The inclined guide surface 21 can better receive the two sections of the flat steel plate 100 into the upper mold 2.

[0020] Furthermore, the wheel hub rounding mold also includes an ejector mechanism 4, which is located on the outer periphery of the molding mandrel 1 and has a horizontal ejection pushing stroke. After the wheel hub is rounded, the ejector mechanism 4 pushes the wheel hub (i.e., the molded flat steel plate 100) away from the molding mandrel 1, achieving rapid ejection. The ejection pushing stroke of the ejector mechanism 4 can be achieved by means of a linear drive mechanism such as a hydraulic cylinder, pneumatic cylinder, or motor. In this embodiment, the ejector mechanism 4 is a push plate arranged around the outer periphery of the molding mandrel 1.

[0021] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that any changes in form and detail made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims fall within the protection scope of the present invention.

Claims

1. A wheel hub pressing die, characterized in that: The device includes a fixed molding mandrel and an upper mold and a lower mold respectively positioned above and below the molding mandrel. The axis of the molding mandrel is horizontal. The upper mold is an arc-shaped structure with its opening facing downwards and directly opposite the molding mandrel, and the lower mold is an arc-shaped structure with its opening facing upwards and directly opposite the molding mandrel. The upper mold and the lower mold are driven to rise and fall by independent drive devices and can hug the circumference of the molding mandrel to form a circle. A roller is provided at each end of the lower mold. The outer circumference of the roller connects with the inner concave contour of the lower mold to form an arc-shaped combination surface that matches the lower half of the outer circular surface of the molding mandrel.

2. The wheel hub pressing die according to claim 1, characterized in that: The inner sides of both ends of the upper mold are provided with inclined guide surfaces that gradually expand outward, and the inclined guide surfaces are connected to the concave contour of the upper mold.

3. The wheel hub rounding die according to claim 1, characterized in that: A bearing is provided at each end of the lower mold, and the roller is connected to the bearing so as to be rotatably connected to the lower mold.

4. The wheel hub pressing die according to claim 1, characterized in that: The two curved ends of the lower mold are configured to be of equal height to form a platform for placing flat materials.

5. The wheel hub rounding die according to claim 1, characterized in that: It also includes a material ejection mechanism, which is located on the outer periphery of the molding mandrel and has a horizontal material ejection push stroke.

6. The wheel hub rounding die according to claim 5, characterized in that: The ejection mechanism is a push plate that surrounds the outer periphery of the molding mandrel.

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