Hub spinning forming die

Abstract

The invention relates to the technical field of hub spinning, in particular to a hub spinning forming die which comprises an upper die and a lower die. A groove is formed in the inner top wall of the upper die, a spiral sliding groove is formed in the groove, a rotating column is arranged on the inner wall of the groove in a matched mode, a contact pad is installed at the bottom of the rotating column, a torsional spring is installed at the top of the rotating column, and the top end of the torsional spring is fixedly connected with the inner top wall of the groove. The outer wall of the rotating column is provided with a sliding ball, the sliding ball is embedded into the spiral sliding groove, a linkage structure of the spiral sliding groove and the rotating column is arranged in the upper die, automatic rotation and positioning of a hub on a center positioning rod of the lower die are achieved, a hub bolt hole and the positioning column can be accurately aligned without manual intervention, and the positioning accuracy of the hub is improved. The problem that the direction of the hub needs to be manually adjusted through a traditional spinning die is effectively solved, the assembly efficiency is remarkably improved, and the operation intensity is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel hub spinning, in particular to a wheel hub spinning forming die. Background Art

[0002] With the increasing demand for lightweight vehicles, aluminum alloy wheels are widely used due to their advantages such as light weight, high strength and good heat dissipation. Among them, spinning forming technology significantly improves the mechanical properties of the rim through local plastic deformation and has become the core process for high-performance wheel manufacturing. China Patent Network has published a patent with the publication number CN103920801A, which is titled: A special wheel hub spinning mold with a locking function. The spinning mold cooperates with a pressure plate through a locking pull rod, so that the wheel hub is pressed on the spinning mold by the pressure plate, thereby completing the locking function of the wheel hub.

[0003] During the use of the above-mentioned mold, the wheel hub needs to be manually rotated and adjusted. The bolt holes on the wheel hub correspond to the corresponding positioning columns, thereby completing the locking of the rotation direction of the wheel hub. Long-term manual adjustment is relatively tiring, and manual rotation adjustment also affects the processing efficiency. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0005] In view of the above-mentioned problem of requiring manual rotation of the wheel hub for positioning, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide a hub spinning die.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a wheel hub spinning die, comprising an upper die, the bottom of the upper die being provided with a pressing edge, the top of the upper die being a support column, and the axial region of the upper die being provided with a center corresponding hole corresponding to the center rod of the lower die; A groove is provided on the inner top wall of the upper mold, a spiral groove is provided inside the groove, a rotating column is fitted on the inner wall of the groove, a contact pad is installed at the bottom of the rotating column, a torsion spring is installed on the top of the rotating column, and the top end of the torsion spring is fixedly connected to the inner top wall of the groove, a sliding ball is installed on the outer wall of the rotating column, and the sliding ball is embedded in the interior of the spiral groove.

[0008] As a preferred solution of the wheel hub spinning forming mold described in the present invention, the bottom of the contact pad contacts the area above the axis of the wheel hub blank, and when the upper mold is pressed down and matched with the lower mold, the rotating column is pressed inside the groove, and through the cooperation of the spiral groove and the sliding ball, the rotating column is pressed and rotated, and the rotation of the rotating column drives the wheel hub to rotate on the center positioning rod of the lower mold through the contact pad.

[0009] As a preferred solution of the wheel hub spinning mold described in the present invention, the lower mold is provided with a mounting groove, and the mounting groove has an opening on the inner wall of the center corresponding hole, and an L-shaped rod is installed on the inner wall of the mounting groove through a pin shaft, one end of the L-shaped rod is located inside the center corresponding hole, and the other end of the L-shaped rod is tilted upward and extends toward the outside of the upper mold, and a spring rod is installed on the bottom side of the extended end of the L-shaped rod.

[0010] As a preferred solution of the wheel hub spinning mold described in the present invention, a lever plate is installed on the inner wall of the mounting groove through a pin shaft, the end of the lever plate with a longer force arm is located on the bottom side of the spring rod, and the end of the lever plate with a shorter force arm is installed with a connecting plate through a pin shaft, and a rack is installed at the bottom of the connecting plate, and the rack extends vertically downward.

[0011] As a preferred solution of the hub spinning mold described in the present invention, a support plate is installed on the inner wall of the installation groove, a restoring spring is installed on the outer wall of the support plate, and one end of the restoring spring is connected to one side of the short lever arm of the lever plate.

[0012] As a preferred solution of the hub spinning mold described in the present invention, wherein: multiple groups of accommodating grooves are opened at the bottom of the upper mold, and each two accommodating grooves constitute a group. The inner wall of each accommodating groove is installed with a rotating plate through an axis, and the side wall of the rotating plate is installed with a fitting wheel. A gear is installed at one end of the axis of the rotating plate, and the gear is engaged with the rack.

[0013] As a preferred solution of the hub spinning mold described in the present invention, the inner wall of the upper mold is equipped with an arc plate, the arc edge of the arc plate is provided with ratchet teeth, the outer wall of the rotating plate is equipped with a fixed arc plate, and the fixed arc plate is equipped with a pawl through a spring part.

[0014] As a preferred solution of the hub spinning mold of the present invention, the pawl is pressed by the spring member and contacts the ratchet teeth, so that the fixed arc plate can move unidirectionally along the arc plate.

[0015] As a preferred solution of the wheel hub spinning mold described in the present invention, the inner wall of the fixed arc plate is installed with a pulling arc plate, one end of the pulling arc plate is installed with a fitting column, the fitting column is in fit contact with the outer wall of the fitting wheel, the outer wall of the pawl is installed with a pull rod, and the pull rod and the pulling slide are connected by a pull rope.

[0016] Beneficial effects The technical scheme provided by the present application has the following beneficial effects compared with the known prior art: I. By integrating the "self-rotating" alignment mechanism composed of a spiral chute, a sliding ball, a rotating column, a torsional spring, and a contact pad in the center area of the upper die, the vertical downward pressure of the upper die can be converted into the circumferential torque of the rotating column during the clamping process, thereby driving the hub blank to automatically rotate along the lower die center positioning rod. When the hub bolt hole rotates to coincide with the positioning column, the hole column forms a plug-in fit under the action of gravity, and the entire rotation-identification-locking process does not require manual observation, poking, or secondary clamping, which not only eliminates human error but also shortens the single-piece clamping time, significantly improving the production line rhythm. At the same time, the torsional spring releases stored energy during the return stroke, driving the rotating column to automatically reset, preparing for the next cycle, and realizing true "one-key" continuous operation. II. To solve the problem of the need for circumferential rigid clamping of the spoke root during spinning and to avoid uneven wall thickness caused by slight rotation, the present application innovatively arranges a multi-stage force amplification and self-adaptive clamping system of L-shaped rod-lever plate-rack-gear-rotating plate inside the lower die: When the center positioning rod is inserted into the corresponding hole in the center of the upper die, it will trigger the L-shaped rod to swing. After the stroke is amplified by the lever plate, the rack synchronously drives multiple rotating plates to fold inward, forming a V-shaped clamping surface around the spoke with the fitting wheel. The one-way locking mechanism of the pawl-ratchet ensures that the clamping gap is immediately eliminated, ensuring zero circumferential movement of the hub during the entire spinning forming period. This mechanism realizes error self-adaptation and fast reset through the spring rod and the reset spring, which can not only accommodate hubs of different widths and spoke numbers but also quickly reset after the mold is opened, leaving sufficient time for the subsequent automated mechanical hand to take the piece. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a schematic diagram of a hub spinning forming die.

[0019] Figure 2 It is a schematic diagram of a hub spinning forming die.

[0020] Figure 3 It is a schematic diagram of the bottom of a hub spinning forming die.

[0021] Figure 4 It is a schematic diagram of the L-shaped rod of a hub spinning forming die.

[0022] Figure 5 A schematic view of a rotating column of a hub spinning forming die.

[0023] Figure 6 A schematic view of a rotating plate of a hub spinning forming die.

[0024] Figure 1 is a schematic view of a spinning forming die according to the present application. Figure 2 is a schematic view of a rotating column of a hub spinning forming die according to the present application. Figure 3 is a schematic view of a rotating plate of a hub spinning forming die according to the present application. Figure 4 is a schematic view of a rotating column of a hub spinning forming die according to the present application. Figure 5 is a schematic view of a rotating plate of a hub spinning forming die according to the present application. Figure 6 is a schematic view of a rotating column of a hub spinning forming die according to the present application. DETAILED DESCRIPTION

[0025] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0026] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details given herein. In other instances, well-known methods have not been described in detail in order to avoid unnecessarily obscuring the present application. Accordingly, it will be appreciated that the present application is not limited to the embodiments disclosed herein, and that the embodiments are not to be construed as limiting the present application.

[0027] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. The "in one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0028] Thirdly, the present application is described in detail in conjunction with the schematic view. In the detailed description of the embodiments of the present application, the sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic view is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions including length, width and depth should be included in the actual manufacture.

[0029] EMBODIMENT REFERENCE Figures 1-6, is an embodiment of the present invention, which provides a hub spinning forming mold, including an upper mold 1, a pressing extension 12 is provided at the bottom of the upper mold 1, the pressing extension 12 is used to press the outer ring edge of the hub, the top of the upper mold 1 is a support column 13, and the axial area of ​​the upper mold 1 is provided with a center corresponding hole 14 corresponding to the center rod of the lower mold; the inner top wall of the upper mold 1 is provided with a groove 2, the interior of the groove 2 is provided with a spiral groove 21, the inner wall of the groove 2 is fitted with a rotating column 22, the bottom of the rotating column 22 is installed with a contact pad 24, the top of the rotating column 22 is installed with a torsion spring 25, and the top of the torsion spring 25 is fixedly connected to the inner top wall of the groove 2, the outer wall of the rotating column 22 is installed with a sliding ball 23, and The sliding ball 23 is embedded in the spiral groove 21, and the wheel hub is placed along the center positioning rod of the lower mold. At this time, the upper mold 1 is directly pressed down through the support column 13. During the pressing process, the contact pad 24 of the rotating column 22 first contacts the top surface of the wheel hub. At this time, the upper mold 1 continues to press down, and its rotating column 22 is gradually squeezed into the inside of the groove 2. During the retraction of the rotating column 22, the sliding ball 23 is guided by the spiral groove 21 to cause the rotating column 22 to rotate. The rotation of the rotating column 22 drives the wheel hub to rotate on the lower mold through the contact pad 24, so that during the rotation of the wheel hub, its bolt hole corresponds to the positioning column. After the bolt hole of the wheel hub corresponds to the positioning column, the rotation direction of the wheel hub is restricted.

[0030] Specifically, the bottom of the contact pad 24 contacts the area above the axis of the hub blank, and when the upper mold 1 is pressed down and matched with the lower mold, the rotating column 22 is compressed inside the groove 2. Through the cooperation of the spiral groove 21 and the sliding ball 23, the rotating column 22 is compressed and rotates. The rotation of the rotating column 22 drives the wheel hub to rotate on the center positioning rod of the lower mold through the contact pad 24 until the bolt hole of the wheel hub is embedded in the positioning column by gravity. At this time, the rotation direction of the wheel hub is restricted, and its contact pad 24 slips on the top surface of the wheel hub.

[0031] Furthermore, a mounting groove 3 is provided inside the lower mold, and the mounting groove 3 has an opening on the inner wall of the center corresponding hole 14. An L-shaped rod 31 is installed on the inner wall of the mounting groove 3 through a pin shaft. One end of the L-shaped rod 31 is located inside the center corresponding hole 14, and the other end of the L-shaped rod 31 is tilted upward and extends toward the outside of the upper mold 1. A spring rod 311 is installed on the bottom side of the extended end of the L-shaped rod 31. The tilted end of the L-shaped rod 31 has a large downward displacement. After its rack 34 moves fully, its rack 34 will no longer move. At this time, the spring rod 311 will be squeezed and contracted. Through the setting of the spring rod 311, the clamping test adaptability of the rotating plate 41 is better, and there will no longer be a rotation gap due to process error problems.

[0032] Furthermore, a lever plate 32 is installed on the inner wall of the mounting groove 3 through a pin shaft. The end of the lever plate 32 with a longer force arm is located on the bottom side of the spring rod 311. The end of the lever plate 32 with a shorter force arm is installed with a connecting plate 33 through a pin shaft. A rack 34 is installed at the bottom of the connecting plate 33. The rack 34 extends vertically downward and adopts a lever structure to ensure that the rack 34 has sufficient force to pull the gear 43 and the fitting wheel 42 of the rotating plate 41 into close contact with the spokes.

[0033] Furthermore, a support plate 35 is installed on the inner wall of the mounting groove 3, and a return spring 36 is installed on the outer wall of the support plate 35. One end of the return spring 36 is connected to the short arm side of the lever plate 32. After the mold is lifted, the return spring 36 pulls the lever plate 32 and the rack 34 to reset, driving the rack 34, the gear 43 and the rotating plate 41 to rotate to their initial positions.

[0034] Furthermore, multiple groups of receiving grooves 4 are opened at the bottom of the upper mold 1, and each two receiving grooves 4 constitute a group. The inner wall of each receiving groove 4 is installed with a rotating plate 41 through an axis, and the side wall of the rotating plate 41 is installed with a fitting wheel 42. A gear 43 is installed at one end of the axis of the rotating plate 41, and the gear 43 is engaged with the rack 34. The rack 34 moves upward to drive the gear 43 to rotate, and the rotating plate 41 rotates inward accordingly, so that the two groups of fitting wheels 42 are V-shaped clamping wheel spokes.

[0035] Furthermore, an arc plate 5 is installed on the inner wall of the upper mold 1, and a ratchet 51 is provided on the arc edge of the arc plate 5. A fixed arc plate 52 is installed on the outer wall of the rotating plate 41. A pawl 54 is installed on the fixed arc plate 52 through a spring. The pawl 54 cooperates with the ratchet 51 to realize one-way locking of the rotating plate 41, thereby eliminating the rotation gap of the wheel hub.

[0036] Furthermore, the pawl 54 is pressed by the spring member to contact the ratchet tooth 51 , so that the fixed arc plate 52 can move unidirectionally along the arc plate 5 .

[0037] Furthermore, a pulling arc plate 6 is installed on the inner wall of the fixed arc plate 52, and a fitting column 61 is installed at one end of the pulling arc plate 6. The fitting column 61 is in contact with the outer wall of the fitting wheel 42, and a pull rod 62 is installed on the outer wall of the pawl 54, and the pull rod 62 is connected to the pulling slide by a pull rope. When the upper mold 1 is lifted, its fitting wheel 42 rolls upward along the side wall of the hub strip, and the rotation of the fitting wheel 42 drives the fitting column 61 to deflect, and the deflection of the fitting column 61 drives the pull rope at the other end to pull the pull rod 62, and the pull rod 62 moves to pull the pawl 54, so that the locking of the ratchet mechanism is cancelled.

[0038] Operation process: During the spinning process, the wheel hub is placed along the central positioning rod of the lower die. At this time, the upper die 1 can be directly pressed down through the support column 13. During the pressing process, the contact pad 24 of the rotating column 22 contacts the top surface of the wheel hub first. At this time, the upper die 1 continues to press down, and its rotating column 22 is gradually squeezed and compressed into the interior of the groove 2. During the retraction of the rotating column 22, its sliding ball 23 is guided by the spiral groove 21, causing the rotating column 22 to rotate. The rotating column 22 rotates through the contact pad 24 to drive the wheel hub to rotate on the lower die, so that during the rotation of the wheel hub, its bolt hole corresponds to the positioning column. After the positioning column is aligned, the rotation direction of the wheel hub is restricted. At this time, the contact pad 24 slips on the top surface of the wheel hub until the upper mold 1 is completely pressed on the lower mold, thereby automatically completing the axial locking and the rotation direction locking, and no longer requiring manual adjustment of the direction; however, there is generally still a rotation gap between the bolt hole of the wheel hub and the positioning column, which makes the rotation direction locking insufficient. At this time, when the upper mold 1 is pressed down, the center positioning rod of the lower mold is inserted into the center corresponding hole 14, and the center positioning rod presses the L-shaped rod 31 protruding into the center corresponding hole 14, so that the tilted end of the L-shaped rod 31 moves downward, and the downward movement of the tilted end of the L-shaped rod 31 drives the spring rod 311 to move. The spring rod 311 contacts and presses on the long arm of the lever plate 32, so that the short arm of the lever plate 32 lifts the connecting plate 33 upward, and the connecting plate 33 pulls the two sets of racks 34 synchronously. The two sets of racks 34 move synchronously to drive the gear 43 to rotate, and the rotation of the gear 43 drives the rotating plate 41 to rotate, so that the fitting wheel 42 of the rotating plate 41 gradually approaches the side wall of the wheel spoke of the hub, until the two sets of rotating plates 41 are fitted in a V-shape on the side wall of the wheel spoke. The spring rod 311 allows the rotating plate 41 to adapt to hub spokes of different widths and with small errors, so that the clamped wheel spokes are completely fitted by the fitting wheels 42 of the two sets of rotating plates 41, and the rotating plate 41 rotates When rotating, it has a ratchet mechanism, and its pawl 54 is locked on the ratchet 51 of the arc plate 5, so that the hub has no rotational clearance in the rotation direction, which effectively improves the processing accuracy during subsequent hub spinning. When the upper mold 1 is lifted, its fitting wheel 42 rolls upward along the side wall of the hub strip, and the rotation of the fitting wheel 42 drives the fitting column 61 to deflect, and the deflection of the fitting column 61 drives the pull rope at the other end to pull the pull rod 62, and the pull rod 62 moves to pull the pawl 54, so that the locking of the ratchet mechanism is cancelled. At this time, the return spring 36 can reset the lever plate 32, the rack 34, the gear 43 and the rotating plate 41, so that the locking at the wheel spoke can be automatically completed.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A wheel hub spinning die, characterized in that: include, An upper mold (1), wherein the bottom of the upper mold (1) is provided with a pressing edge (12), the top of the upper mold (1) is a support column (13), and the axial region of the upper mold (1) is provided with a center corresponding hole (14) corresponding to the center rod of the lower mold; The inner top wall of the upper mold (1) is provided with a groove (2), the inner part of the groove (2) is provided with a spiral groove (21), the inner wall of the groove (2) is fitted with a rotating column (22), the bottom of the rotating column (22) is provided with a contact pad (24), the top of the rotating column (22) is provided with a torsion spring (25), and the top end of the torsion spring (25) is fixedly connected to the inner top wall of the groove (2), the outer wall of the rotating column (22) is provided with a sliding ball (23), and the sliding ball (23) is embedded in the inner part of the spiral groove (21).

2. The wheel hub spinning die according to claim 1, wherein: The bottom of the contact pad (24) contacts the area above the axis of the hub blank, and when the upper die (1) is pressed down and matched with the lower die, the rotating column (22) is compressed inside the groove (2), and through the cooperation between the spiral groove (21) and the sliding ball (23), the rotating column (22) is pressed and rotated. The rotation of the rotating column (22) drives the hub to rotate on the center positioning rod of the lower die through the contact pad (24).

3. The wheel hub spinning die according to claim 2, wherein: A mounting groove (3) is provided inside the lower mold, and the mounting groove (3) has an opening exposed on the inner wall of the center corresponding hole (14). An L-shaped rod (31) is installed on the inner wall of the mounting groove (3) via a pin shaft. One end of the L-shaped rod (31) is located inside the center corresponding hole (14), and the other end of the L-shaped rod (31) is tilted upward and extends toward the outside of the upper mold (1). A spring rod (311) is installed on the bottom side of the extended end of the L-shaped rod (31).

4. The wheel hub spinning die according to claim 3, wherein: A lever plate (32) is mounted on the inner wall of the mounting groove (3) via a pin, and the end of the lever plate (32) with a longer force arm is located at the bottom side of the spring rod (311). A connecting plate (33) is mounted on the end of the lever plate (32) with a shorter force arm via a pin, and a rack (34) is mounted on the bottom of the connecting plate (33), and the rack (34) extends vertically downward.

5. The wheel hub spinning die according to claim 4, wherein: A support plate (35) is installed on the inner wall of the installation groove (3), and a return spring (36) is installed on the outer wall of the support plate (35). One end of the return spring (36) is connected to one side of the short lever arm of the lever plate (32).

6. The wheel hub spinning die according to claim 5, wherein: The bottom of the upper mold (1) is provided with a plurality of groups of receiving grooves (4), and each two receiving grooves (4) constitute a group. A rotating plate (41) is mounted on the inner wall of each receiving groove (4) via an axis, and a fitting wheel (42) is mounted on the side wall of the rotating plate (41). A gear (43) is mounted on one end of the axis of the rotating plate (41), and the gear (43) is meshed with the rack (34).

7. The wheel hub spinning die according to claim 6, wherein: The inner wall of the upper mold (1) is provided with an arc plate (5), the arc edge of the arc plate (5) is provided with ratchet teeth (51), the outer wall of the rotating plate (41) is provided with a fixed arc plate (52), and the fixed arc plate (52) is provided with a ratchet (54) via a spring member.

8. The wheel hub spinning die according to claim 7, wherein: The pawl (54) is pressed by the spring member to contact the ratchet (51), so that the fixed arc plate (52) can move unidirectionally along the arc plate (5).

9. The wheel hub spinning die according to claim 8, wherein: The inner wall of the fixed arc plate (52) is installed with a pulling arc plate (6), one end of the pulling arc plate (6) is installed with a fitting column (61), the fitting column (61) is in fitting contact with the outer wall of the fitting wheel (42), the outer wall of the pawl (54) is installed with a pull rod (62), and the pull rod (62) is connected to the pulling slide plate by a pull rope.

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