Hub spinning die structure

Abstract

The utility model discloses a hub spinning die structure which comprises a spinning lower die, an annular extending portion is formed on the outer side wall of the lower portion of the spinning lower die, and the top face of the annular extending portion and the outer side wall of the spinning lower die are the bottom face and the inner side wall of a forming cavity. The inner side of the top face of the annular extending part is provided with an annular protruding part which extends upwards, and the section of the top face of the annular protruding part is in a transverse S shape. During spinning, it can be guaranteed that the annular protruding part is formed at the inner end of the bottom face of the rim at the bottom of the rim of the hub, the machining allowance is increased, the follow-up machining difficulty is lowered, the scrap probability is lowered, and the machining effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wheel hub manufacturing equipment technical field more specifically relates to a kind of wheel hub spinning die structure. BACKGROUND

[0002] Spinning is installed on the die of spinning machine blank, while rotating with the die bed main shaft, spinning wheel or chasing stick is pressed on blank, and local plastic deformation is generated.

[0003] The existing aluminum alloy wheel hub is generally manufactured by spinning process, however, in the existing aluminum alloy wheel hub spinning process, the bottom end face of the rim of the bottom of the wheel rim cannot be formed with a convex structure; It is easy to cause insufficient machining allowance, such as Figure 1 As shown, the inner end of the bottom end face of the rim 1a of the wheel hub is a plane, so that the machining allowance is insufficient, and the subsequent processing difficulty is increased, and the scrap rate is increased. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the insufficient of prior art, provide a kind of wheel hub spinning die structure, it can be guaranteed that the bottom end face inner end of the rim of the bottom of the wheel rim is formed with annular convex part when spinning, improve machining allowance, so that subsequent processing difficulty is reduced, and scrap rate is reduced, and processing effect is improved.

[0005] The utility model solves the technical problem of the scheme:

[0006] A kind of wheel hub spinning die structure, including spinning lower die, annular extension is formed on the lower part outer side wall of spinning lower die, the top surface of annular extension and the outer side wall of spinning lower die are the bottom surface and inner side wall of forming cavity;

[0007] The inner side of the top surface of the annular extension is provided with annular convex part with S-shaped cross section extending upward.

[0008] The cross section of the outer end top surface of the annular convex part is arc-shaped upward, and the cross section of the inner end top surface is arc-shaped downward.

[0009] The outer side wall of the annular convex part is a tapered wall, and the outer diameter of the top is smaller than the outer diameter of the bottom.

[0010] The outer end of the top surface of the annular extension is formed with annular mounting groove extending inward, annular reinforcing part is nested in annular mounting groove, the bottom surface of annular reinforcing part is pressed on the bottom surface of annular mounting groove, and the inner side wall of annular reinforcing part is pressed on the inner side wall of annular mounting groove;

[0011] The middle part to the inner side of the top surface of the annular reinforcing part is formed with an annular raised part extending upward, and the cross section of the top surface of the annular raised part is an S-shaped transverse arrangement.

[0012] The utility model discloses a protruding effect is:

[0013] Compared with the prior art, it can ensure that the inner end of the bottom surface of the flange of the bottom of the rim of the hub is formed with an annular raised part during spinning, improve the machining allowance, reduce the subsequent processing difficulty, reduce the scrap rate and improve the processing effect. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the partial structure schematic view of the original spinning lower die during spinning of the utility model;

[0015] Figure 2 It is the partial structure schematic view during spinning of the utility model; DETAILED DESCRIPTION

[0016] Embodiment, see as Figure 2 The utility model discloses a kind of hub spinning die structure, including spinning lower die 10, annular extension 11 is formed on the lower part outer side wall of spinning lower die 10, the top surface of annular extension 11 and the inner side wall of the bottom surface of forming cavity of spinning lower die 10 are outer side wall;

[0017] The outer end of the top surface of the annular extension 11 is formed with annular mounting groove 12 extending inward, annular reinforcing part 30 is nested in annular mounting groove 12, the bottom surface of annular reinforcing part 30 is pressed on the bottom surface of annular mounting groove 12, and the inner side wall of annular reinforcing part 30 is pressed on the inner side wall of annular mounting groove 12.

[0018] The middle part to the inner side of the top surface of the annular reinforcing part 30 is formed with annular raised part 20 extending upward, and the cross section of the top surface of the annular raised part 20 is an S-shaped transverse arrangement.

[0019] Further, the outer end top surface of the annular raised part 20 is arc-shaped, and the inner end top surface is arc-shaped.

[0020] Further, the outer side wall of the annular raised part 20 is a tapered wall, and the outer diameter of the top is smaller than the outer diameter of the bottom.

[0021] Further, the top surface of the annular extension 11 at the inner side of the annular mounting groove 12 is arc-shaped, which is connected with the inner end of the top surface of the annular raised part 20, to realize the arc extension of the inner end of the top surface of the annular raised part 20.

[0022] Further, the middle part to the outer end of the top surface of the annular reinforcing part 30 is a plane.

[0023] The bottom surface of the annular reinforcing part 30 is welded and fixed on the bottom surface of the annular mounting groove 12, and the inner side wall of the annular reinforcing part 30 is welded and fixed on the inner side wall of the annular mounting groove 12.

[0024] In use, the original hub 100 is stretched by the rotation of the spinning lower die 10 and the outer spinning wheel, so as to form the formed hub 200, at this time, the annular protruding part 300 is formed at the inner side of the bottom end surface of the rim of the bottom end of the rim of the formed hub 200, which is embedded in the arc-shaped groove at the inner end of the annular protruding part 20, so as to improve the machining allowance, reduce the subsequent machining difficulty, reduce the scrap rate, and improve the machining effect.

[0025] Finally, it should be pointed out that the above embodiments are only relatively representative examples of the present application. Obviously, the present application is not limited to the above embodiments, and there can be many variations. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments shall be considered as falling within the protection scope of the present application.

Claims

1. A hub spinning die structure comprising a spinning lower die (10), characterized in that: An annular extension (11) is formed on the lower outer side wall of the spinning lower die (10), and the top surface of the annular extension (11) and the outer side wall of the spinning lower die (10) form the bottom surface and the inner side wall of the forming cavity. An annular protrusion (20) with an S-shaped cross section is formed on the inner side of the top surface of the annular extension (11).

2. A hub spinning die structure according to claim 1, wherein: The cross section of the outer end top surface of the annular protrusion (20) is an upwardly convex arc shape, and the cross section of the inner end top surface is a downwardly extending arc shape.

3. The hub spinning die structure of claim 1, wherein: The outer side wall of the annular protrusion (20) is a tapered wall, and the outer diameter of the top portion is smaller than that of the bottom portion.

4. The hub spinning die structure of claim 1, wherein: An annular mounting groove (12) is formed on the outer end of the top surface of the annular extension (11), and an annular reinforcing portion (30) is nested in the annular mounting groove (12). An annular protrusion (20) with an S-shaped cross section is formed on the inner side of the top surface of the annular extension (11).

5. A hub spinning die structure according to claim 4, wherein: The cross section of the top surface of the annular protrusion (20) is an arc shape, which is connected to the inner end of the top surface of the annular protrusion (20).

6. A hub spinning die structure according to claim 4, wherein: The top surface of the annular reinforcing portion (30) is flat from the middle portion to the outer end. The bottom surface of the annular reinforcing portion (30) is welded and fixed to the bottom surface of the annular mounting groove (12), and the inner side wall of the annular reinforcing portion (30) is welded and fixed to the inner side wall of the annular mounting groove (12).

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