A forging method for lightweight flash on the outer ring of a wheel hub bearing

Abstract

This invention provides a forging method for lightweight flash on the outer ring of a wheel hub bearing, comprising the following steps: S1, using a lower die guiding structure, the diameter of the lower die being larger than the diameter of the upper die, and forming flash and flash groove when the upper die enters the lower die; S2, the flash groove, from the inside out, includes an upwardly inclined section, a first horizontal section, a downwardly inclined section, and a second inclined section; S3, the extension length of the flash is set as the maximum radius value X of the irregularly shaped product plus a fixed extension value S. This invention has advantages such as reducing flash weight and lowering forming load.

Description

Technical Field

[0001] This invention relates to the field of metal hot forming, and specifically to a forging method for lightweight flash on the outer ring of a wheel hub bearing. Background Technology

[0002] Wheel bearings are critical components in automotive chassis, and the outer ring of a wheel bearing is a particularly important type of critical component. Because wheel bearing outer rings are often irregularly shaped, their production primarily employs open-die forging. A crucial aspect of open-die forging design is the flash structure design, which significantly impacts material utilization and the quality of forging filling. Therefore, optimizing the flash structure design in open-die forging can greatly improve material utilization and ultimately address the key technical challenge of reducing flash weight.

[0003] Currently, taking the forming process of the outer ring of wheel hub bearings as an example, the general flash design methods include typical structure flash groove, wedge flash groove, and expanded flash groove. This invention has designed a new flash structure design method that is also applicable to most forms of die forging. This design method can effectively improve the material utilization rate of forgings and achieve the effect of optimizing the product filling process, reducing the proportion of product material waste.

[0004] Therefore, it is necessary to provide a new technical solution. Summary of the Invention

[0005] To address the technical problems existing in the prior art, this invention discloses a forging method for lightweight flash on the outer ring of a wheel hub bearing, the specific technical solution of which is as follows:

[0006] This invention provides a forging method for lightweight flash on the outer ring of a wheel hub bearing, comprising the following steps:

[0007] S1 adopts a lower mold guide structure, with the lower mold diameter being larger than the upper mold diameter. When the upper mold enters the lower mold, flash and flash groove are formed.

[0008] S2, the flash groove includes, from the inside out, an upward inclined section, a first horizontal section, a downward inclined section, and a second inclined section;

[0009] S3, the extension length of the burr is set to the maximum radius value X of the irregularly shaped product plus a fixed extension value S.

[0010] Furthermore, the gap between the upper mold and the lower mold is 0.15 mm per side.

[0011] Furthermore, both the upward and downward inclined sections of the flash groove form a 45° angle with the horizontal plane.

[0012] Furthermore, the heights of the four channels of the flash groove from the inside out are H1, H2, H3 and H4, where H1≥H4>H2>H3.

[0013] Furthermore, the horizontal height of the second horizontal segment is higher than the starting point height of the upward sloping segment, and the horizontal height of the second horizontal segment is lower than the horizontal height of the first horizontal segment.

[0014] Furthermore, the fixed extension value S is 5-10 mm.

[0015] Furthermore, the inner diameter of the lower mold is 2X+2S.

[0016] The present invention has the following beneficial effects:

[0017] 1. The forging method for lightweight flash of the outer ring of wheel hub bearing provided by the present invention can effectively solve the problem of excessive flash in open die forging and can reduce the forming load to a certain extent.

[0018] 2. The forging method for lightweight flash of the outer ring of the wheel hub bearing provided by the present invention greatly reduces the weight of the flash.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the flash groove provided in an embodiment of the present invention. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] This invention discloses a forging method for lightweight flash on the outer ring of a wheel hub bearing, which includes the following steps:

[0026] S1 adopts a lower mold guide structure, with the lower mold diameter being larger than the upper mold diameter. When the upper mold enters the lower mold, flash and flash groove are formed.

[0027] S2, the flash groove includes, from the inside out, an upward inclined section, a first horizontal section, a downward inclined section, and a second inclined section;

[0028] S3, the extension length of the burr is set as the maximum radius value X of the irregular product plus a fixed extension value S.

[0029] This invention specifies that the maximum allowable extension length of the flash is taken as the starting point of the maximum outer diameter X of the irregularly shaped product, and then a specified outward extension length value S is given, so that the flash has a fixed and controllable minimum extension length. The lateral extension length S of the flash in this invention can be increased or decreased in actual use depending on experimental data and production conditions.

[0030] In one embodiment, the gap between the upper and lower molds is 0.15 mm per side.

[0031] In one embodiment, both the upward and downward inclined sections of the flash groove form a 45° angle with the horizontal plane.

[0032] refer to Figure 1The heights of the four channels of the flash groove, from the inside out, are H1, H2, H3, and H4, where H1 ≥ H4 > H2 > H3. The horizontal height of the second horizontal segment is higher than the starting point height of the upward sloping edge segment, and the horizontal height of the second horizontal segment is lower than the horizontal height of the first horizontal segment.

[0033] The fixed extension value S is 5-10 mm.

[0034] The inner diameter of the lower mold is 2X+2S.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0036] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of the present invention.

Claims

1. A forging method for lightweight flash on the outer ring of a wheel hub bearing, characterized in that, Includes the following steps: S1 adopts a lower mold guiding structure, with the lower mold diameter being larger than the upper mold diameter. When the upper mold enters the lower mold, flash and flash groove are formed. S2, the flash groove includes, from the inside out, an upward inclined section, a first horizontal section, a downward inclined section, and a second horizontal section; S3, the extension length of the burr is set as the maximum radius value X of the irregular product plus a fixed extension value S.

2. The forging method for the lightweight flash of the outer ring of the wheel hub bearing according to claim 1, characterized in that, The gap between the upper and lower molds is 0.15 mm per side.

3. The forging method for the lightweight flash of the outer ring of the wheel hub bearing according to claim 1, characterized in that, The upward and downward inclined sections of the flash groove are both at a 45° angle to the horizontal plane.

4. The forging method for the lightweight flash of the outer ring of the wheel hub bearing according to claim 1, characterized in that, The heights of the four channels of the flash groove from the inside out are H1, H2, H3 and H4, where H1≥H4>H2>H3.

5. The forging method for the lightweight flash of the outer ring of the wheel hub bearing according to claim 1, characterized in that, The horizontal height of the second horizontal segment is higher than the starting point height of the upward sloping segment, and the horizontal height of the second horizontal segment is lower than the horizontal height of the first horizontal segment.

6. The forging method for the lightweight flash of the outer ring of the wheel hub bearing according to claim 1, characterized in that, The fixed extension value S is 5-10 mm.

7. The forging method for the lightweight flash of the outer ring of the wheel hub bearing according to claim 1, characterized in that, The inner diameter of the lower mold is 2X+2S.

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