Method and equipment for manufacturing hollow bent parts
The method of hot shear bending using two devices for forming crank sections with small radii simplifies the production of high-strength hollow bent parts, achieving efficient and integrated U-shaped structures with reduced complexity and improved strength.
JP2026115444APending Publication Date: 2026-07-09NIPPON STEEL CORPORATION
Patent Information
- Application Number
- JP2024232152
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-07-09
Smart Images
Figure 2026115444000001_ABST
Abstract
The objective is to provide a method for manufacturing hollow bent parts and equipment for manufacturing hollow bent parts that can produce integrated hollow bent parts, including U-shaped or similar shapes, using a simpler process. [Solution] This method for manufacturing hollow bent parts is a method for obtaining hollow bent parts by hot shear bending a long hollow material Pm made of metal using a hollow bent part manufacturing facility equipped with a first hot bending device 10 and a second hot bending device 20, comprising: a first hot shear bending step in which a first portion located in the middle of the longitudinal direction of the hollow material Pm is hot shear bent by the first hot bending device 10 to form a first crank portion x; and a second hot shear bending step in which a second portion of the hollow material Pm spaced apart from the first portion along the longitudinal direction is hot shear bent by the second hot bending device 20 to form a second crank portion y.
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Citation Information
Patent Citations
Method of bending processing for metal material, bending processing apparatus, bending processing equipment line and bending-processed produced obtained thereby
WO2006093006A1
Method for manufacturing hollow bent member and device for manufacturing hollow bent member
WO2022208744A1