Method for manufacturing a one-piece wheel by forging and a one-piece wheel manufactured thereby

Patent metadata

Field	Value
Publication number	US-12187073-B2
Application number	US-202217718556-A
Country	US
Kind code	B2
Filing date	Apr 12, 2022
Priority date	Dec 2, 2021
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

A method for manufacturing a one-piece wheel by forging includes: producing an integral forging comprising: a disc portion, a rim portion, and an annular protrusion protruding from one side of the disc portion in a forging method; producing an outer bend by bending the annular protrusion through a flow-forming process; and forming a hollow portion by welding one end of the outer bend to one side of the rim portion.

First claim

What is claimed is:

1. A method for manufacturing a one-piece wheel by forging, the method comprising:
producing an integral forging comprising: a disc portion, a rim portion, and an annular protrusion protruding from one side of the disc portion toward the rim portion in a forging method;
producing an outer bend by bending the annular protrusion through a flow-forming process; and
forming a hollow portion by welding one end of the outer bend to one side of the rim portion.

2. The method of claim 1 ,
wherein the annular protrusion is formed to be spaced apart from the rim portion at a predetermined interval in a radial outside direction of the disc portion corresponding to a thickness in a radial direction of the hollow portion.

3. The method of claim 1 , further comprising: flow-forming the rim portion after the producing of the integral forging.

4. The method of claim 3 ,
wherein the producing of the outer bend and the flow-forming of the rim portion are performed by using a same roller.

5. The method of claim 1 , further comprising: forming a resonance hole in the outer bend after the producing of the outer bend.

6. The method of claim 5 , further comprising: boring-processing the resonance hole to adjust a depth of the resonance hole after the forming of the resonance hole in the outer bend.

7. The method of claim 1 , further comprising: forming a plurality of hollow portions.

8. The method of claim 7 ,
wherein hollow portions of the plurality of hollow portions respectively have a same volume.

9. The method of claim 7 ,
wherein at least two hollow portions among hollow portions of the plurality of hollow portions have different volumes.

10. The method of claim 7 ,
wherein among hollow portions of the plurality of hollow portions, a hollow portion is separated from a neighboring hollow portion by a confining wall.

11. The method of claim 7 ,
wherein one resonance hole is formed in each hollow portion of the plurality of hollow portions.

12. The method of claim 1 ,
wherein the welding in the forming of the hollow portion is performed by using friction stir welding, and
wherein the friction stir welding is performed by using a friction stir welding tool comprising: a welding tool operated to rotate, and a lift pin disposed on one side of the welding tool and configured to perform a moving-up or moving-down operation with respect to the welding tool.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Hands Corp Ltd

Inventors

• Kim Young-Chan
• Jo Young-Rae
• Lee Jun-Min
• Park Byoung-Ok
• Kim Young-Sik
• Han Geon-Ki

Classifications

• B60B2310/211

  by folding or bending · CPC title

• B23K20/129

  specially adapted for particular articles or work · CPC title

• B23K20/1255

  Tools therefor, e.g. characterised by the shape of the probe · CPC title

• B23K20/122

  using a non-consumable tool, e.g. friction stir welding · CPC title

• B21D53/264

  wheels out of a single piece (B21D53/261 takes precedence) · CPC title