Wheel rolling equipment and wheels

Abstract

This invention discloses a wheel rolling apparatus, including a spoked roller. The spoked roller has a first conical surface, a second conical surface, and a third conical surface for contacting the rim of the wheel blank during rolling. The second conical surface is located between the first and third conical surfaces, and the second and third conical surfaces are connected by a first connecting surface. The third conical surface is configured to axially limit the rim of the wheel blank during rolling. By optimizing the structure of the spoked roller, this wheel rolling apparatus can avoid sharpening of the corners of the inner diameter surface of the rim during rolling, thereby reducing folding defects on the inner diameter surface of the wheel rim during rolling. This invention also discloses a wheel.

Description

Technical Field

[0001] This invention belongs to the field of wheel rolling forming technology, specifically relating to a wheel rolling equipment and a wheel. Background Technology

[0002] Vertical rolling of wheels is a special type of ring rolling and a key step in the forming of rolled steel wheels. During the rolling process, the rim and part of the spoke metal are repeatedly rolled and deformed through radial and axial deformation zones to achieve the forming of the rim and the extension of the spokes.

[0003] In current production technology, the working surface of the spoke rolls in vertical wheel rolling mills consists of two conical surfaces and an arc segment between the conical surfaces. Figure 6 As shown in the diagram, the first conical surface contacts the spokes, and the second conical surface contacts the inner diameter surface of the rim. In the radial deformation zone, under the radial extrusion of the main roll and spoke rolls, the rim thickness decreases and the rim width increases. Due to the small radial reduction per revolution, the deformation is not deep, and the rim widens into a double-drum shape. Under the action of the second conical surface of the spoke rolls, the corners of the rim sides near the inner diameter surface are relatively sharp. In the axial deformation zone, under the action of the left and right edge rolls, the rim width decreases and the thickness increases. Similarly, due to the poor deformation penetration, the deformation is concentrated on the surface, and the corners at the junction of the rim sides and the inner diameter surface become further sharpened. When this sharp corner enters the radial deformation zone as the wheel rotates, if there is wheel sway, it is easy to form metal folds under the rolling of the spoke rolls, and the folds are distributed circumferentially. During the subsequent rolling and diameter expansion process, as the metal flows from the rim to the spokes in the transition zone, the folds at the inner diameter surface corners migrate along the inner diameter surface towards the spokes. Due to the shape characteristics of the rim, the deformation penetration on the inner side of the rim in the radial deformation zone is significantly lower than that on the outer side. As a result, the sharpness of the inner diameter surface corners near the outer side of the rim is significantly greater than that on the outer side. Consequently, fold defects appear more frequently near the inner diameter surface D1, with fold depths reaching up to 8 mm. These defects are difficult to eliminate even through machining, often leading to wheel scrap and severely impacting the wheel rolling pass rate.

[0004] It is desirable to provide an improved wheel rolling equipment, particularly regarding the process of reducing folding on the inner diameter surface of the wheel rim during wheel rolling. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a wheel rolling apparatus, the purpose of which is to reduce folding on the inner diameter surface of the wheel rim during wheel rolling.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a wheel rolling equipment, including a spoke roller, wherein a first conical surface, a second conical surface and a third conical surface are provided on the spoke roller for contacting the rim of the wheel blank during the rolling process, the second conical surface is located between the first conical surface and the third conical surface, the second conical surface and the third conical surface are connected by a first connecting surface, and the third conical surface is configured to axially limit the rim of the wheel blank during the rolling process.

[0007] The angle between the third conical surface and the second conical surface is 110° to 130°.

[0008] The length of the third conical surface is 20–30 mm.

[0009] The length of the third cone is less than the length of the second cone.

[0010] The spoke roller is provided with a fourth conical surface, and the third conical surface is located between the second and fourth conical surfaces.

[0011] The second conical surface and the fourth conical surface are parallel.

[0012] The fourth conical surface and the third conical surface are connected by a second connecting surface.

[0013] The radius of the second connecting surface is 5 to 10 mm.

[0014] The radius of the first connecting surface is 10-20 mm.

[0015] The present invention also provides a wheel manufactured using the aforementioned wheel rolling equipment.

[0016] The wheel rolling equipment of the present invention, by optimizing the structure of the spoke rollers, can avoid sharpening of the corners of the inner diameter surface of the wheel rim during the rolling process, thereby reducing the folding defects of the inner diameter surface of the wheel rim during wheel rolling. Attached Figure Description

[0017] This manual includes the following figures, which illustrate the following:

[0018] Figure 1 This is a schematic diagram of the structure of the wheel rolling equipment of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the spoke roller;

[0020] Figure 3 This is a magnified view of a portion of the spoke roller;

[0021] Figure 4 This is a schematic diagram of the structure of the wheel rolling equipment of the present invention. Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the structure of a train wheel blank;

[0023] Figure 6 This is a schematic diagram of the structure of existing wheel rolling equipment;

[0024] Figure 7 This is a schematic diagram of the existing spoke roller structure;

[0025] The markings in the diagram are as follows: 1. Left spoke roller; 2. Right spoke roller; 21. First conical surface; 22. Second conical surface; 23. Third conical surface; 24. Fourth conical surface; 3. Main roller; 4. Hub; 5. Spoke; 6. Rim; 7. Inner diameter surface. Detailed Implementation

[0026] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and to facilitate its implementation.

[0027] It should be noted that in the following embodiments, the terms "first," "second," and "third" do not represent an absolute distinction in structure and / or function, nor do they represent the order of execution; they are merely for the convenience of description.

[0028] like Figure 6 The diagram shows the configuration of the radial deformation zone rolls in an existing vertical wheel rolling mill. The rim metal deforms within the groove formed by the left spoke roll 1, the right spoke roll 2, and the main roll 3, achieving radial compression of the rim and extension of the spokes, resulting in widening of both sides of the rim.

[0029] exist Figure 6 and Figure 7 In the existing technology, the second conical surface of the spoke rollers presses against the inner diameter surface of the rim, forming a sharp corner at the junction of the inner diameter surface and the side surface of the rim. After rolling by the edge rolling rollers, this corner becomes even sharper. Due to the dimensional accuracy differences in the blank during the blanking process, the wheel inevitably experiences a certain degree of wobble during rolling. This wobble causes the sharp corner of the inner diameter surface to form circumferentially distributed corner folds under the rolling of the spoke rollers. As the diameter expands during rolling, the folded metal will move along the inner diameter surface towards the spokes, and the final fold position often appears about 10mm away from the side surface of the rim. Therefore, the two important factors causing the folds are: 1) the sharpening of the corners of the inner diameter surface of the rim in the existing technology; and 2) the wobble during the wheel rolling process.

[0030] like Figures 1 to 4As shown, the present invention provides a wheel rolling equipment, including a main roll 3 and two spoke rolls, the two spoke rolls being a left spoke roll 1 and a right spoke roll 2. During the rolling process, the wheel blank is located between the left spoke roll 1 and the right spoke roll 2, and the two spoke rolls have the same structure.

[0031] This invention does not change the existing radial-axial rolling process for wheels; it only requires a redesign of the spoke rolls. By adding two shorter conical surfaces and a connecting surface between the conical surfaces to the original spoke rolls, the manufacturing cost of the spoke rolls remains essentially unchanged. In the existing technology, during the initial and middle stages of wheel rolling, the radial deformation zone near the inner diameter surface of the rim widens considerably, and the corners of the inner diameter surface become significantly sharper.

[0032] In this invention, during the rolling process, the inner and outer surfaces near the inner diameter surface 7 of the rim are restricted by the third conical surface 23, resulting in a reduction in width. Under the action of the first connecting surface between the second conical surface 22 and the third conical surface 23, the corner of the inner diameter surface 7 (the part where the rim end face connects to the inner diameter surface 7, such as...) Figure 5 The inner diameter surfaces (D1 and D2) are smooth. During the expansion process, the metal on the inner diameter surface 7 flows relatively stably towards the spokes. Even if the wheel experiences a certain degree of sway during the rolling process, it significantly reduces the possibility of folding at the corners of the inner diameter surface 7, thus improving the rolling yield.

[0033] like Figure 5 As shown, the train wheel blank consists of a rim 6, a hub 4, and spokes 5, which are coaxially arranged. Spokes 5 are located between the rim 6 and the hub 4. Each spoke 5 has two opposing ends, designated as a first end and a second end. The first end of spoke 5 is fixedly connected to the rim 6, and the second end is fixedly connected to the hub 4. The rim 6 has two rim end faces, which are the end faces at opposite ends of the rim 6. Spokes 5 are located between these two rim end faces. The rim 6 also has two inner diameter surfaces 7. Axially, the first end of spoke 5 is located between the two inner diameter surfaces 7, and the two inner diameter surfaces 7 are connected to the edges of the second end of spoke 5. The two inner diameter surfaces 7 are the inner wall surfaces of the rim 6 facing the hub 4 and coaxial with it. The ends of the two inner diameter surfaces 7 are respectively connected to the edges of the two rim end faces.

[0034] like Figures 1 to 5As shown, the spoke roll is provided with a first conical surface 21, a second conical surface 22, and a third conical surface 23 for contacting the rim 6 of the wheel blank during rolling. The second conical surface 22 is located between the first conical surface 21 and the third conical surface 23, and the second conical surface 22 and the third conical surface 23 are connected by a first connecting surface. The third conical surface 23 is configured to axially limit the rim 6 of the wheel blank during rolling. The first conical surface 21, the second conical surface 22, and the third conical surface 23 are coaxially arranged conical surfaces, and the axes of the first conical surface 21, the second conical surface 22, and the third conical surface 23 are also the axes of the spoke roll.

[0035] During the rolling process, the first conical surface 21 contacts the spokes of the wheel blank, the second conical surface 22 contacts the spokes and inner diameter surface 7 of the wheel blank, and the third conical surface 23 contacts the rim end face of the wheel blank. The rim 6 is located between the third conical surfaces 23 of the two spoke rolls, and the corner of the inner diameter surface contacts the first connecting surface. The generatrix of the first connecting surface is arc-shaped, which makes the corner of the inner diameter surface smooth under the action of the first connecting surface.

[0036] like Figures 1 to 4 As shown, a fourth conical surface 24 is provided on the spoke roller, and a third conical surface 23 is located between the second conical surface 22 and the fourth conical surface 24. The fourth conical surface 24 and the third conical surface 23 are coaxial conical surfaces. The fourth conical surface 24 and the third conical surface 23 are connected by a second connecting surface, and the generatrix of the second connecting surface is an arc shape.

[0037] like Figures 1 to 3 As shown, the included angle α between the third conical surface 23 and the second conical surface 22 is 110°–130°. The length L3 of the generatrix of the third conical surface 23 is 20–30 mm. The length of the generatrix of the third conical surface 23 is less than the length of the generatrix of the second conical surface 22, and the generatrix of the second conical surface 22 is parallel to the generatrix of the fourth conical surface 24. The radius r2 of the generatrix of the first connecting surface is 10–20 mm, and the radius r3 of the generatrix of the second connecting surface is 5–10 mm.

[0038] like Figures 1 to 4As shown, the large-diameter end of the first conical surface 21 is connected to the large-diameter end of the second conical surface 22, and the two are connected by a circular arc transition, forming a circular arc transition surface. The small-diameter end of the first conical surface 21 is connected to the first end face of the spoke roller, and the diameter of the small-diameter end of the first conical surface 21 is smaller than the diameter of the large-diameter end. The small-diameter end of the second conical surface 22 is connected to one end of the first connecting surface, and the other end of the first connecting surface is connected to the large-diameter end of the third conical surface 23, and the diameter of the small-diameter end of the second conical surface 22 is smaller than the diameter of the large-diameter end. The small-diameter end of the third conical surface 23 is connected to one end of the second connecting surface, and the other end of the second connecting surface is connected to the large-diameter end of the fourth conical surface 24. The small-diameter end of the fourth conical surface 24 is connected to the tail end of the spoke roller, and the diameters of the small-diameter ends of the third conical surface 23, the fourth conical surface 24, the second conical surface 22, and the third conical surface 23 are all smaller than the large-diameter end of the fourth conical surface 24.

[0039] like Figures 1 to 4 As shown, during rolling, the working parts of the spoke roll are the first conical surface 21, the second conical surface 22, the third conical surface 23, the arc transition surface between the first conical surface 21 and the second conical surface 22, and the first connecting surface between the second conical surface 22 and the third conical surface 23. The shape of the rolling radial deformation zone is as follows: Figure 1 , Figure 4 As shown.

[0040] Thus, in the early and middle stages of rolling, the radial deformation zone of the wheel blank is clamped by the third conical surface 23 of the two spoke rollers. Due to the clamping effect of the third conical surface 23 of the two spoke rollers, the widening of the metal at the corner of the inner diameter surface of the wheel rim is limited to a certain extent. At the same time, the arc segment between the second conical surface 22 and the third conical surface 23 effectively avoids the sharpening of the corner between the inner diameter surface of the wheel rim 6 and the end face of the wheel rim 6, reducing the possibility of corner folding.

[0041] The present invention also provides a wheel manufactured using a wheel rolling equipment with the above-described structure.

[0042] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A wheel rolling apparatus comprising a main roller and two web rollers, the two web rollers being a left web roller and a right web roller, respectively, and a wheel blank being located between the left web roller and the right web roller during rolling, the two web rollers being identical in structure, characterized in that, The spoke roller is provided with a first taper surface, a second taper surface and a third taper surface for contacting the rim of the wheel blank during rolling, the second taper surface is located between the first taper surface and the third taper surface, the second taper surface and the third taper surface are connected by a first connecting surface, and the third taper surface is arranged to axially limit the rim of the wheel blank during rolling; The first taper surface, the second taper surface and the third taper surface are coaxially arranged conical surfaces, and the axes of the first taper surface, the second taper surface and the third taper surface are also the axis of the spoke roller; The wheel blank of the train wheel is composed of a rim, a hub and a spoke, the rim, the hub and the spoke are coaxially arranged, the rim further has two inner diameter surfaces, in the axial direction of the rim, the first end of the spoke is located between the two inner diameter surfaces, the two inner diameter surfaces are connected with the edge of the second end of the spoke, the two inner diameter surfaces are the inner wall surfaces of the rim facing the hub and coaxial with the hub, and the ends of the two inner diameter surfaces are respectively connected with the edges of the two rim end surfaces; The large-diameter end of the first taper surface is connected with the large-diameter end of the second taper surface, and the two are connected by a circular arc transition, forming a circular arc transition surface, the small-diameter end of the first taper surface is connected with the first end surface of the spoke roller, and the diameter of the small-diameter end is smaller than that of the large-diameter end; the small-diameter end of the second taper surface is connected with one end of the first connecting surface, the other end of the first connecting surface is connected with the large-diameter end of the third taper surface, and the diameter of the small-diameter end of the second taper surface is smaller than that of the large-diameter end; The small-diameter end of the third taper surface is connected with one end of the second connecting surface; During rolling, the working parts of the spoke roller are the first taper surface, the second taper surface, the third taper surface, the circular arc transition surface between the first taper surface and the second taper surface, and the first connecting surface between the second taper surface and the third taper surface; During rolling, the first taper surface contacts the spoke of the wheel blank, the second taper surface contacts the spoke and the inner diameter surface of the wheel blank, the third taper surface contacts the end surface of the rim of the wheel blank, the rim is located between the third taper surfaces of the two spoke rollers, and the corner part of the inner diameter surface contacts the first connecting surface; the generatrix of the first connecting surface is circular arc-shaped, and under the action of the first connecting surface, the corner part of the inner diameter surface can be made smooth; In the initial and middle stages of rolling, the radial deformation zone of the wheel blank is clamped by the third taper surfaces of the two spoke rollers, and due to the clamping action of the third taper surfaces of the two spoke rollers, the spread of the metal of the corner part of the inner diameter surface of the rim is limited to a certain extent, and the circular arc segment between the second taper surface and the third taper surface avoids the sharpness between the inner diameter surface of the rim and the end surface of the rim.

2. A wheel rolling apparatus according to claim 1, characterized in that The included angle between the third taper surface and the second taper surface is 110-130°.

3. A wheel rolling apparatus according to claim 1, wherein The length of the third taper surface is 20-30 mm.

4. A wheel rolling apparatus according to any one of claims 1 to 3, characterized in that, The length of the third taper surface is smaller than the length of the second taper surface.

5. A wheel rolling apparatus according to any one of claims 1 to 4, characterized in that, A fourth taper surface is arranged on the spoke roller, and the third taper surface is located between the second taper surface and the fourth taper surface.

6. A wheel rolling apparatus according to claim 5, characterised in that The second taper surface and the fourth taper surface are parallel.

7. A wheel rolling apparatus according to claim 5, wherein The fourth taper surface and the third taper surface are connected by a second connecting surface.

8. A wheel rolling mill according to claim 7, characterized in that The radius of the second connecting surface is 5-10 mm.

9. A wheel rolling mill according to any one of claims 1 to 8, characterized in that The radius of the first connecting surface is 10-20 mm.

10. A vehicle wheel, characterised by: The train wheel is made by using the wheel rolling equipment according to any one of claims 1-9.

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