Wheel rolling equipment and wheel

Abstract

The wheel rolling equipment comprises a radial plate roller, the radial plate roller is provided with a first conical surface, a second conical surface and a third conical surface which are used for making contact with a rim of a wheel blank in the rolling process, the second conical surface is located between the first conical surface and the third conical surface, and the second conical surface and the third conical surface are connected through a first connecting surface; and the third conical surface is arranged to be used for axially limiting the rim of the wheel blank in the rolling process. According to the wheel rolling equipment, by optimizing the structure of the radial plate roller, sharpening of the corner of the inner diameter face of the rim in the rolling process can be avoided, and therefore the folding defect of the inner diameter face of the rim for wheel rolling is reduced. The invention further discloses a wheel.

Description

Technical Field

[0001] The invention belongs to the technical field of wheel rolling forming, and in particular relates to a wheel rolling device and a wheel. Background Art

[0002] Wheel vertical rolling is a special type of ring rolling and is a key step in the forming of rolled steel wheels. During the rolling process, the rim and part of the web metal are repeatedly rolled and deformed in the radial deformation zone and the axial deformation zone to achieve the forming of the rim and the extension of the web.

[0003] In current production technology, the working surface of the web roller of the wheel vertical rolling mill is composed of two conical surfaces and the arc segment between the conical surfaces ( Figure 6 As shown in the figure, the first conical surface is in contact with the spoke plate, and the second conical surface is in contact with the inner diameter surface of the rim. In the radial deformation zone, the rim metal is subjected to radial extrusion by the main roller and the spoke plate roller, and the rim thickness decreases and the rim width increases. Since the radial reduction amount during each rolling is small, the deformation is not deep, and the widening of the two sides of the rim is formed into a double drum shape. Under the action of the second conical surface of the spoke plate roller, the inner diameter surface of the rim has a sharper corner near the inner diameter surface. In the axial deformation zone, the rim metal is subjected to the action of the left and right edge rolling rollers, and the rim width decreases and the thickness increases. Similarly, due to the poor deformation penetration, the deformation is concentrated on the surface, and the corner at the junction of the rim side and the inner diameter surface is further sharpened. When this sharp corner enters the radial deformation zone as the wheel rotates, if there is a yaw of the wheel, it is easy to form metal folds under the rolling of the spoke plate roller, and the folds are distributed along the circumferential direction. In the subsequent rolling expansion process, as the metal in the transition zone between the rim and the spoke flows toward the spoke, the folding of the inner diameter surface corner will migrate along the inner diameter surface toward the spoke. Based on the rim shape characteristics, the deformation permeability of the inner side of the rim in the radial deformation zone is significantly lower than that of the outer side of the rim. In this way, the sharpness of the inner diameter surface corner of the rim near the outer side of the rim is significantly greater than that of the inner diameter surface corner area on the outer side. In this way, the folding defect near the inner diameter surface D1 appears more frequently, and the folding depth can reach 8mm. It is difficult to eliminate it even by machining, which often leads to the scrapping of the wheel and seriously affects the wheel rolling qualification rate.

[0004] It is desirable to provide an improved wheel rolling apparatus, particularly with respect to a process for reducing folding of the inner diameter face of a wheel rolled rim. Summary of the invention

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

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: the wheel rolling equipment includes a web roller, and the web roller is provided with a first conical surface, a second conical surface and a third conical surface 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 included angle between the third conical surface and the second conical surface is 110-130°.

[0008] The length of the third cone surface is 20-30 mm.

[0009] The length of the third tapered surface is smaller than the length of the second tapered surface.

[0010] A fourth conical surface is arranged on the web roller, and the third conical surface is located between the second conical surface and the fourth conical surface.

[0011] The second tapered surface is parallel to the fourth tapered surface.

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

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

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

[0015] The invention also provides a wheel, which is manufactured by using the wheel rolling equipment.

[0016] The wheel rolling equipment of the present invention can avoid the sharpening of the corner of the inner diameter surface of the rim during the rolling process by optimizing the structure of the spoke plate roller, thereby reducing the folding defect of the inner diameter surface of the rim during wheel rolling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] This specification includes the following drawings, which show the following contents:

[0018] Figure 1 The structure diagram of the wheel rolling equipment of the present invention is shown in FIG. Figure 1 ;

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

[0020] Figure 3 It is a partial enlarged view of the spoke roller;

[0021] Figure 4 The structure diagram of the wheel rolling equipment of the present invention is shown in FIG. Figure 2 ;

[0022] Figure 5 It is a schematic diagram of the structure of a railway wheel blank;

[0023] Figure 6 It is a structural schematic diagram of existing wheel rolling equipment;

[0024] Figure 7 It is a structural schematic diagram of an existing spoke roller;

[0025] Markings in the figure are: 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 DESCRIPTION

[0026] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and facilitating its implementation.

[0027] It should be noted that, in the following embodiments, the “first”, “second” and “third” mentioned do not represent an absolute distinction in structure and / or function, nor do they represent a sequence of execution, but are merely for the convenience of description.

[0028] like Figure 6 The figure shows the configuration diagram of the rollers in the radial deformation zone of the existing wheel vertical rolling. The rim metal is deformed in the hole formed by the left spoke roller 1, the right spoke 2 and the main roller 3, achieving radial compression of the rim and extension of the spoke, and widening of the two sides of the rim.

[0029] exist Figure 6 and Figure 7 In the prior art shown, the second conical surface of the spoke roller squeezes the inner diameter surface of the rim, and a sharp corner is formed at the junction of the inner diameter surface and the side of the rim. After rolling by the edge roller, this corner will be further sharpened. Due to the difference in wheel blank size accuracy during the blank making process, the wheel will inevitably have a certain degree of deflection during the rolling process. This deflection phenomenon will cause the sharp corner of the inner diameter surface to form a circumferentially distributed corner fold under the rolling of the spoke roller. As the rolling expands the diameter, the folded metal will move along the inner diameter surface toward the spoke, and the final folding position often appears about 10mm away from the side of the rim. It can be seen that the two important factors causing the folding are: 1) the sharpening of the corner of the inner diameter surface of the rim in the prior art; 2) the deflection during the wheel rolling process.

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

[0031] The present invention does not change the existing wheel diameter-axial rolling process, and only needs to redesign the spoke roller. Two conical surfaces with smaller lengths and connecting surfaces between the conical surfaces are added to the original spoke roller, and the manufacturing cost of the spoke roller is basically not increased. In the prior art, in the early and middle stages of wheel rolling, the side surface close to the inner diameter surface of the rim in the radial deformation zone is widened greatly, and the inner diameter surface corner is significantly sharpened.

[0032] In the present invention, during the rolling process, the inner and outer side surfaces close to the inner diameter surface 7 of the rim are restricted by the third conical surface 23, and the width is reduced. 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 connecting part between the rim end surface and the inner diameter surface 7, such as Figure 5 During the expansion process, the metal on the inner diameter surface 7 flows stably toward the spoke plate. Even if the wheel has a certain degree of deflection during the rolling process, the possibility of folding at the corner of the inner diameter surface 7 is significantly reduced, thereby improving the rolling qualification rate.

[0033] like Figure 5 As shown, the railway wheel blank is composed of a rim 6, a hub 4 and a spoke 5. The rim 6, the hub 4 and the spoke 5 are coaxially arranged, and the spoke 5 is located between the rim 6 and the hub 4. The spoke 5 has two opposite ends, and the two opposite ends of the spoke 5 are respectively a first end and a second end. The first end of the spoke 5 is fixedly connected to the rim 6, and the second end of the spoke 5 is fixedly connected to the hub 4. The rim 6 has two rim end faces, which are end faces at opposite ends of the rim 6, and the spoke 5 is located between the two rim end faces. The rim 6 also has two inner diameter surfaces 7. In the axial direction of the rim 6, the first end of the spoke 5 is located between the two inner diameter surfaces 7, and the two inner diameter surfaces 7 are connected to the edge of the second end of the spoke 5. The two inner diameter surfaces 7 are inner wall surfaces of the rim 6 facing the hub 4 and coaxial with the hub 4, and 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 web roller 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 the rolling process, the second conical surface 22 is located between the first conical surface 21 and the third conical surface 23, the second conical surface 22 and the third conical surface 23 are connected by a first connecting surface, and the third conical surface 23 is provided for axially limiting the rim 6 of the wheel blank during the rolling process. 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 web roller.

[0035] During the rolling process, the first conical surface 21 contacts the spoke of the wheel blank, the second conical surface 22 contacts the spoke and inner diameter surface 7 of the wheel blank, 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 rollers, and the inner diameter surface corner contacts the first connecting surface. The generatrix of the first connecting surface is an arc shape, and under the action of the first connecting surface, the inner diameter surface corner can become smooth.

[0036] like Figures 1 to 4 As shown, the spoke roller is provided with a fourth conical surface 24, the third conical surface 23 is located between the second conical surface 22 and the fourth conical surface 24, and the fourth conical surface 24 and the third conical surface 23 are coaxially arranged 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 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 there is an arc transition between the two to form an arc transition surface. The small diameter end of the first conical surface 21 is connected to the first end surface of the web 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, and the small diameter end of the fourth conical surface 24 is connected to the tail end of the web roller, the diameter of the small diameter end of the third conical surface 23 is smaller than the diameter of the large diameter end, the diameter of the small diameter end of the fourth conical surface 24 is smaller than the diameter of the large diameter end, the diameter of the small diameter end of the second conical surface 22 is smaller than the diameter of the large diameter end of the third conical surface 23, and the diameter of the small diameter end of the third conical surface 23 is smaller than the diameter of 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 web roller 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 hole in the rolling radial deformation zone is as follows: Figure 1 , Figure 4 shown.

[0040] In this way, in the early and middle stages of rolling, the radial deformation zone of the wheel blank is clamped by the third conical surfaces 23 of the two spoke rollers. Due to the clamping effect of the third conical surfaces 23 of the two spoke rollers, the expansion of the metal at the corner of the inner diameter surface of the 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 rim 6 and the end face of the rim 6, reducing the possibility of corner folding.

[0041] The present invention also provides a wheel, which is manufactured by using the wheel rolling equipment with the above structure.

[0042] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. Wheel rolling equipment, comprising a web roller, characterized in that: The spoke roller is provided with 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 conical surface and the third conical surface. The second conical surface and the third conical surface are connected by a first connecting surface. The third conical surface is configured to axially limit the rim of the wheel blank during rolling.

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

3. The wheel rolling equipment according to claim 1, characterized in that: The length of the third cone surface is 20-30 mm.

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

5. The wheel rolling equipment according to any one of claims 1 to 4, characterized in that: A fourth conical surface is arranged on the web roller, and the third conical surface is located between the second conical surface and the fourth conical surface.

6. The wheel rolling equipment according to claim 5, characterized in that: The second tapered surface is parallel to the fourth tapered surface.

7. The wheel rolling equipment according to claim 5, characterized in that: The fourth conical surface and the third conical surface are connected via a second connecting surface.

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

9. The wheel rolling equipment 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 wheel, characterized in that: The wheel rolling device is manufactured using the wheel rolling device described in any one of claims 1 to 9.

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