Hub middle disc swing grinding mold

Abstract

The utility model discloses a hub middle disc swing grinding die which comprises a base, a lower die core, an upper section die and a material returning rod, the lower die core is located in the base, the lower die core is provided with a lower die cavity, the material returning rod is arranged in a lifting mode relative to the lower die core and located at the axis position of the lower die cavity, and the upper section die is arranged in a lifting mode relative to the base and can stretch into the lower die cavity. An upper forming face of a rotary structure is arranged at the lower end of the upper section die and comprises a material distributing angle, a material expanding face and a material returning face which are sequentially arranged outwards from the axis of the upper forming face, a lower forming face is arranged at the bottom of the lower die cavity, the upper end of the material returning rod can stretch out of the lower forming face, and a positioning protruding ring used for positioning materials is arranged on the periphery of the upper end of the material returning rod. And the positioning convex ring and the material distribution angle are coaxially arranged. The swing grinding forming device has the advantages that one-time swing grinding forming of the hub middle disc is achieved, and the swing grinding forming quality is high.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub manufacturing equipment, in particular to a wheel hub center disc swing rolling mould. Background Art

[0002] The wheel hub is a cylindrical metal component whose center is mounted on an axle, supporting the tire's inner profile. The center of the wheel hub is the hub disc. Existing wheel hubs are typically formed by casting or forging. However, cast hubs have poor strength, especially at the hub disc, which reduces their service life. Forging is also very expensive. Therefore, some have proposed using a swing roller to produce wheel hubs.

[0003] The authorization announcement number of the Chinese patent application is CN220760897U. The utility model patent named "A kind of isothermal swing rolling mold for aluminum alloy wheel hub" was authorized and announced on April 12, 2024. The application includes an upper mold for connecting to the swing head of the swing rolling machine. The axis of the upper mold is vertical, and a base is provided under the upper mold. The base is provided with a concave mold adapted to the upper mold, and the upper surface of the concave mold is concave to form a forming cavity; from the lower surface of the upper mold upward, the outer circumference of the upper mold gradually decreases to form a truncated cone with a small top and a large bottom.

[0004] The disadvantages of the existing technology are that the bar material lacks positioning in the swing rolling die, making it difficult to swing roll out a wheel hub of required specifications and shape, and the material is prone to deflection, which is prone to product defects. Summary of the Invention

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a wheel hub center disc swing rolling die, which can realize one-time swing rolling forming of the wheel hub center disc and has high swing rolling forming quality.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A wheel hub center plate swing rolling mold includes a base, a lower mold core, an upper mold and a material return rod. The lower mold core is located in the base, and the lower mold core is provided with a lower mold cavity. The material return rod is set to rise and fall relative to the lower mold core and is located at the axial position of the lower mold cavity. The upper mold is set to rise and fall relative to the base and the upper mold can extend into the lower mold cavity. The lower end of the upper mold is provided with an upper forming surface with a rotating structure. The upper forming surface includes a dividing angle, an expanding surface and a returning surface arranged in sequence from its axis to the outside. The bottom of the lower mold cavity is provided with a lower forming surface. The upper end of the material return rod can extend out of the lower forming surface and the outer periphery of the upper end of the material return rod is provided with a positioning convex ring for positioning the material, and the positioning convex ring is coaxially arranged with the dividing angle.

[0008] This application enables one-time swing-rolling of the hub center disc. The positioning cam allows for quick and easy positioning of the material, with the material positioned coaxially below the dividing angle. When the upper die is pressed downward, the dividing angle corresponds to the material's axial position, ensuring reliable material distribution at all circumferential locations. This reduces potential product defects and improves the quality of the hub center disc's swing-rolling. The expansion surface disclosed in this application's upper forming surface assists in material outflow, while the return surface limits the material's outflow range, allowing the material to be more concentrated within the lower die cavity during swing-rolling, improving the quality of swing-rolling of the material in the corners.

[0009] Preferably, the material ejector rod includes a material ejection section with its upper end surface positioned within the lower die cavity, and further includes a positioning protrusion so that the material ejector rod can only be pushed upward from the bottom when the upper end surface of the material ejector rod is opposite the lower forming surface. The material ejection section is used to push the material formed in the lower die cavity upward out of the lower die cavity, achieving material ejection efficiency. The positioning protrusion provides the material ejector rod with a downward limit position. When the material ejector rod is in the downward limit position, the material ejector rod can function as part of the lower forming surface, providing sufficient pressure to complete the swing rolling of the material.

[0010] As a preferred embodiment, the outer periphery of the positioning protruding ring is connected to the lower forming surface, so as to make the lower side of the material formed by the swing rolling smooth and avoid quality defects.

[0011] Preferably, the lower die cavity is provided with an easy-pushing surface with a downward taper angle on the outer periphery of the lower forming surface, so as to facilitate the removal of the material after the rolling forming.

[0012] Preferably, the taper angle of the easy-to-push surface is not greater than 10 degrees. When the upper die is lowered, the easy-to-push surface can play a central guiding role for the upper die, ensuring the stability of the axis of the material dividing angle when the upper die is lowered, thereby improving the quality of the swing rolling forming.

[0013] Preferably, the end of the splitter angle is provided with a spherical surface for transition, which makes the initial downward force of the splitter angle blunt, thus avoiding easy wear of the end of the splitter angle and extending the service life of the splitter angle.

[0014] As an advantage, the material expansion surface is in the form of a frustum with a downwardly tapered angle. During the downward pressing of the upper die, the material expansion surface cooperates with the material dividing angle to achieve outward diffusion of the material during the swing rolling, thereby ensuring the swing rolling efficiency.

[0015] Preferably, the return material surface is in the form of a frustum with an upwardly tapered angle, so as to ensure that the outer material moves back during the pressing process of the upper mold, thereby fully filling the inner corners of the lower mold cavity and avoiding quality defects.

[0016] Preferably, the lower mold cavity and the lower mold core are of a rotary structure, and a radial limiter is provided between the base and the lower mold core to limit the rotation of the lower mold core. The forces acting on the lower mold core in all directions are similar, thereby ensuring the service life of the lower mold core.

[0017] The utility model has the advantages of being able to realize one-time swing rolling forming of the hub center disc and having high swing rolling forming quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a wheel hub center disc swing rolling mold before swinging, shown in one embodiment of the present utility model.

[0019] Figure 2 yes Figure 1 Enlarged schematic diagram of point A in the middle.

[0020] Figure 3 It is a structural schematic diagram of an upper mold in a wheel hub center disc swing rolling mold shown in one embodiment of the present utility model.

[0021] Figure 4 This is a structural schematic diagram of a wheel hub center disc swing rolling mold after swing rolling, shown in one embodiment of the present utility model.

[0022] In the figure: base 1;

[0023] Lower mold core 2, lower mold cavity 21, lower molding surface 22, step portion 23, easy-to-push surface 24;

[0024] Upper mold 3, upper forming surface 31, dividing angle 32, expanding surface 33, returning surface 34, first transition fillet 35, second transition fillet 36;

[0025] Material-removing rod 4, positioning convex ring 41, material-removing section 42, guide section 43;

[0026] Bar 5, blank 6. DETAILED DESCRIPTION

[0027] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0028] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear" and the like are used to indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0029] One embodiment of the present invention provides a wheel hub center plate swing rolling mold, such as Figures 1 to 4 As shown, it includes a base 1, a lower mold core 2, an upper mold 3 and a return rod 4. The lower mold core 2 is located in the base 1. The lower mold core 2 is provided with a lower mold cavity 21. The return rod 4 is set to rise and fall relative to the lower mold core 2 and is located at the axial position of the lower mold cavity 21. The upper mold 3 is set to rise and fall relative to the base 1 and the upper mold 3 can extend into the lower mold cavity 21. The lower end of the upper mold 3 is provided with an upper forming surface 31 with a rotating structure. The upper forming surface 31 includes a dividing angle 32, an expanding surface 33 and a returning surface 34 arranged in sequence from its axis to the outside. The bottom of the lower mold cavity 21 is provided with a lower forming surface 22. The upper end of the return rod 4 can extend out of the lower forming surface 22 and the outer periphery of the upper end of the return rod 4 is provided with a positioning convex ring 41 for positioning the material. The positioning convex ring 41 is coaxially arranged with the dividing angle 32.

[0030] The swing rolling mold disclosed in the present application is used for the swing rolling forming of the hub center plate. The material used before swing rolling is a rod 5. When preparing to swing roll the hub center plate, the rod with a calculated volume is first heated to a specific temperature, such as 500 to 530 degrees Celsius, and maintained for a specific insulation time. The insulation time is determined according to the size of the rod. The rod is placed on the positioning convex ring 41 of the material return rod 4. The diameter of the rod is equal to the inner diameter of the positioning convex ring 41. The rod is placed in the positioning convex ring 41 to form the positioning of the rod. Then, the upper mold 3 is controlled to start swinging and pressing down. After pressing down a certain distance, the rod is flattened between the upper forming surface 31 and the lower forming surface 22 and fully fills the lower mold cavity 21 between the two. Then, the upper mold 3 is driven to rise, and the swing rolling of the hub center plate into a blank 6 is completed.

[0031] In this embodiment, the upper mold 3 can be raised and lowered using linear drive components such as pneumatic cylinders, hydraulic cylinders, and electric cylinders. Hydraulic cylinders are preferred because they provide stable pressure. The upper mold 3 oscillates at a speed of 1 rpm / s and descends at a speed of 2 mm / s, with an amplitude of 2 degrees.

[0032] The present invention utilizes a positioning collar 41 to conveniently and quickly position the material, placing it coaxially below the material divider angle 32. When the upper die 3 is pressed downward, the divider angle 32 corresponds to the material's axis, ensuring reliable material distribution at all circumferential locations. This reduces potential product defects and improves the quality of the wheel hub's center plate during pendulum forming. The expansion surface 33 disclosed on the upper forming surface 31 of the present invention assists in material outflow, while the return surface 34 limits the material's outflow range, ensuring a more concentrated accumulation of material within the lower die cavity 21 during pendulum forming, improving the pendulum forming quality of the material in the corners.

[0033] As one of the embodiments of the present invention, a wheel hub middle plate swing rolling mold is proposed. Figures 1 to 4 As shown, it includes a base 1, a lower mold core 2, an upper mold 3 and a material return rod 4. The lower mold core 2 is located in the base 1. The lower mold core 2 is provided with a lower mold cavity 21. The material return rod 4 is set to rise and fall relative to the lower mold core 2 and is located at the axial position of the lower mold cavity 21. The upper mold 3 is set to rise and fall relative to the base 1 and can extend into the lower mold cavity 21. The lower end of the upper mold 3 is provided with an upper forming surface 31 with a rotary structure. The upper forming surface 31 includes a material dividing angle 32, an expansion surface 33 and a return surface 34 arranged in sequence from its axis to the outside. The bottom of the lower mold cavity 21 is provided with a lower forming surface 22. The upper end of the material return rod 4 can extend out of the lower forming surface 22 and the outer periphery of the upper end of the material return rod 4 is provided with a positioning convex ring 41 for positioning the material. The positioning convex ring 41 is coaxially arranged with the material dividing angle 32. The outer periphery of the positioning convex ring 41 is connected to the lower forming surface 22. The positioning collar 41 is annular in shape, with a cylindrical inner surface and a flat upper surface. The upper surface of the collar 41 intersects with the lower forming surface 22 to form a connection. The end of the splitter angle 32 is provided with a spherical surface for transition. The expansion surface 33 is a frustum with a downward-facing cone angle. This spherical surface ensures that the initial downward force on the splitter angle 32 is blunt, preventing wear on the end of the splitter angle 32 and extending its service life. As can be seen from the figure, the intersection of the expansion surface 33 and the return surface 34 corresponds to the inner ring of the positioning convex ring 41 in the axial direction of the upper forming surface 31, that is, in the process of the upper mold 3 descending and swinging, the dividing angle 32 and the expansion surface 33 play the role of dividing and expanding the material within the peripheral range of the positioning convex ring 41, and fully utilize the limiting effect of the inner ring of the positioning convex ring 41. The inner ring of the positioning convex ring 41 plays a uniform limiting role on the lower end of the rod in all directions, so that the upper end of the rod is evenly turned outward and flows to form cloth.

[0034] As one of the embodiments of the present invention, a wheel hub middle plate swing rolling mold is proposed. Figures 1 to 4As shown, it includes a base 1, a lower mold core 2, an upper mold 3 and a material return rod 4. The lower mold core 2 is located in the base 1. The lower mold core 2 is provided with a lower mold cavity 21. The material return rod 4 is set to rise and fall relative to the lower mold core 2 and is located at the axial position of the lower mold cavity 21. The upper mold 3 is set to rise and fall relative to the base 1 and can extend into the lower mold cavity 21. The lower end of the upper mold 3 is provided with an upper forming surface 31 with a rotary structure. The upper forming surface 31 includes a material dividing angle 32, an expansion surface 33 and a return surface 34 arranged in sequence from its axis to the outside. The bottom of the lower mold cavity 21 is provided with a lower forming surface 22. The upper end of the material return rod 4 can extend out of the lower forming surface 22 and the outer periphery of the upper end of the material return rod 4 is provided with a positioning convex ring 41 for positioning the material. The positioning convex ring 41 is coaxially arranged with the material dividing angle 32. The outer periphery of the positioning convex ring 41 is connected to the lower forming surface 22. The positioning collar 41 is annular in shape, with a cylindrical inner surface and a flat upper end surface. The upper end surface of the positioning collar 41 intersects with the lower forming surface 22 to form a connection. The end of the splitter angle 32 is provided with a spherical surface for transition. The expansion surface 33 is shaped like a frustum with a downward-facing cone angle. The return surface 34 is shaped like a frustum with an upward-facing cone angle. In this embodiment, a first transition fillet 35 is provided at the junction of the expansion surface 33 and the splitter angle 32, and a second transition fillet 36 is provided at the junction of the expansion surface 33 and the return surface 34. These two transition fillets ensure smooth flow of the upper side of the material during pendulum rolling. The upper side of the material flowing out of the circumference of the positioning collar 41 immediately mates with the return surface 34, ensuring that the material flows back during the downward pressure of the upper mold 3, ensuring that the lower mold cavity 21 is fully filled with material and avoiding quality defects. The lower end of the material return surface 34 is provided with a frustum surface with a smaller cone angle than the material return surface 34 to further play the role of material return.

[0035] As a simple replacement for the above solution, the generatrix of the material expansion surface 33 and the material return surface 34 are both arc-shaped or other curved shapes that are recessed into the interior of the upward mold 3, thereby playing a role in smoothly guiding the material.

[0036] As one of the embodiments of the present invention, a wheel hub middle plate swing rolling mold is proposed. Figures 1 to 4As shown, it includes a base 1, a lower mold core 2, an upper mold 3 and a return rod 4. The lower mold core 2 is located in the base 1. The lower mold core 2 is provided with a lower mold cavity 21. The return rod 4 is set to rise and fall relative to the lower mold core 2 and is located at the axial position of the lower mold cavity 21. The upper mold 3 is set to rise and fall relative to the base 1 and the upper mold 3 can extend into the lower mold cavity 21. The lower end of the upper mold 3 is provided with an upper forming surface 31 with a rotating structure. The upper forming surface 31 includes a dividing angle 32, an expanding surface 33 and a returning surface 34 arranged in sequence from its axis to the outside. The bottom of the lower mold cavity 21 is provided with a lower forming surface 22. The upper end of the return rod 4 can extend out of the lower forming surface 22 and the outer periphery of the upper end of the return rod 4 is provided with a positioning convex ring 41 for positioning the material. The positioning convex ring 41 is coaxially arranged with the dividing angle 32. The ejector rod 4 includes an ejector section 42 with its upper end surface located in the lower mold cavity 21 , and also includes a positioning protrusion so that the ejector rod 4 can only be pushed upward when its upper end surface is opposite to the lower molding surface 22 .

[0037] In this embodiment, the material return rod 4 also includes a guide section 43 located at the lower end of the material return section 42. The guide section 43 and the material return section 42 are coaxially arranged. The shapes of the guide section 43 and the material return section 42 are both cylindrical. The diameter of the guide section 43 is smaller than the diameter of the material return section 42, so that a positioning protrusion is formed at the lower end of the material return section 42. A step portion 23 that cooperates with the positioning protrusion is provided on the lower mold core 2. The step portion 23 cooperates with the positioning protrusion to complete the support and limitation of the material return section 42.

[0038] As a simple replacement of the above solution, the outer peripheral shape of the material stripping section 42 is a truncated cone or a spherical surface. When the outer peripheral shape of the material stripping section 42 is a spherical surface, the upper end of the material stripping section 42 passes through the center of the spherical surface.

[0039] As one of the embodiments of the present invention, a wheel hub middle plate swing rolling mold is proposed. Figures 1 to 4As shown, it includes a base 1, a lower mold core 2, an upper mold 3 and a material return rod 4. The lower mold core 2 is located in the base 1. The lower mold core 2 is provided with a lower mold cavity 21. The material return rod 4 is set to rise and fall relative to the lower mold core 2 and is located at the axial position of the lower mold cavity 21. The upper mold 3 is set to rise and fall relative to the base 1 and the upper mold 3 can extend into the lower mold cavity 21. The lower end of the upper mold 3 is provided with an upper molding surface 31 with a rotary structure. The upper molding surface 31 includes a dividing angle 32, an expansion surface 33 and a return surface 34 arranged in sequence from its axis outward. The bottom of the lower mold cavity 21 is provided with a lower molding surface 22. The upper end of the material return rod 4 can extend out of the lower molding surface 22 and the outer periphery of the upper end of the material return rod 4 is provided with a positioning convex ring 41 for positioning the material. The positioning convex ring 41 is coaxially arranged with the dividing angle 32. In this embodiment, the lower mold cavity 21 is a rotary structure, the lower mold core 2 is a rotary structure, and a radial limiting portion for limiting the rotation of the lower mold core 2 is provided between the base 1 and the lower mold core 2. The rotation axis of the lower mold cavity 21 is set vertically, so the lower forming surface 22 is also a rotating structure. The rotation generatrix of the lower forming surface 22 is a curve type with multiple sections of curves smoothly connected. The inner periphery of the lower forming surface 22 intersects with the outer peripheral edge of the positioning convex ring 41 on the ejector rod 4, so that the positioning convex ring 41 is connected to the lower forming surface 22. Ensure the quality of the lower side of the hub center disc during swing rolling forming. The lower mold cavity 21 is provided with an easy-push surface 24 with a downward taper angle on the outer periphery of the lower forming surface 22. The shape of the easy-push surface 24 is a frustum. Furthermore, the taper angle of the easy-push surface 24 is not greater than 10 degrees. In this embodiment, the taper angle of the easy-push surface 24 is 5 degrees. Ensure that the ejector rod 4 can be easily pushed out. When the upper mold 3 descends, the easy-push surface 24 can play a role in centering and guiding the upper mold 3, ensuring that the axis of the dividing angle 32 is stable when the upper mold 3 descends, thereby improving the quality of swing rolling forming.

[0040] The use of the swing rolling mold of the present application can realize one-time swing rolling forming of the hub center disc, and the quality of the swing rolling forming is high.

[0041] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are included within the scope of the claims.

Claims

1. A wheel hub center plate swing rolling mold, characterized in that: It includes a base, a lower mold core, an upper mold and a return rod. The lower mold core is located in the base, and the lower mold core is provided with a lower mold cavity. The return rod is set to rise and fall relative to the lower mold core and is located at the axial position of the lower mold cavity. The upper mold is set to rise and fall relative to the base and the upper mold can extend into the lower mold cavity. The lower end of the upper mold is provided with an upper forming surface with a rotating structure. The upper forming surface includes a dividing angle, an expanding surface and a returning surface arranged in sequence from its axis to the outside. The bottom of the lower mold cavity is provided with a lower forming surface. The outer periphery of the upper end of the return rod is provided with a positioning convex ring for positioning the material, and the positioning convex ring is coaxially arranged with the dividing angle.

2. A wheel hub center plate swing rolling mold according to claim 1, characterized in that: The ejector rod includes an ejector section with its upper end surface located in the lower mold cavity, and the ejector rod also includes a positioning protrusion so that the ejector rod can only be pushed out from bottom to top when the upper end surface of the ejector rod is opposite to the lower molding surface.

3. The wheel hub center plate swing rolling mold according to claim 1, characterized in that: The outer periphery of the positioning convex ring is connected to the lower forming surface.

4. The wheel hub center plate swing rolling mold according to claim 1, characterized in that: The lower mold cavity is provided with an easy-pushing surface with a downward taper angle on the outer periphery of the lower molding surface.

5. The wheel hub center plate swing rolling mold according to claim 4, characterized in that: The cone angle of the easy-to-push surface is no greater than 10 degrees.

6. The wheel hub center plate swing rolling mold according to claim 1, characterized in that: The end of the dividing angle is provided with a transitional spherical surface.

7. The wheel hub center plate swing rolling mold according to claim 1, characterized in that: The shape of the expanded surface is a frustum with a cone angle facing downward.

8. The wheel hub center plate swing rolling mold according to claim 1, characterized in that: The shape of the return material surface is a frustum with an upward cone angle.

9. A wheel hub center plate swing rolling mold according to any one of claims 1 to 8, characterized in that: The lower mold cavity is a rotary structure, the lower mold core is a rotary structure, and a radial limiting portion for limiting the rotation of the lower mold core is provided between the base and the lower mold core.

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