Invention Publication
- Patent Title: TUBULAR ROTARY COMPONENT, MANUFACTURING METHOD THEREFOR, AND MOLD THEREFOR
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Application No.: US18752897Application Date: 2024-06-25
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Publication No.: US20240342785A1Publication Date: 2024-10-17
- Inventor: Atsushi SUGAMA , Takatsugu KITORA
- Applicant: NIPPON STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL CORPORATION
- Current Assignee: NIPPON STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Priority: JP 19014591 2019.01.30
- The original application number of the division: US17426912 2021.07.29
- Main IPC: B21D31/00
- IPC: B21D31/00 ; B21D24/00 ; B21D53/10 ; C21D9/40

Abstract:
Provided is a method for manufacturing a tubular rotary component from a donut-shaped metal disc, wherein the generation of wrinkles or cracks due to a drawing process can be suppressed. This method for manufacturing a tubular rotary component 100B includes: an intermediate molding step in which the entirety of both surfaces of a donut-shaped metal disc 100 having a prescribed inner diameter D1 and outer diameter D2 are pressed by the respective tapered surfaces of a punch 10A and a die 20A provided with a prescribed taper to carry out bore-expansion drawing, thereby obtaining a frustoconical intermediate molded article 100A; and a final molding step in which the intermediate molded article 100A is pressed by a punch 10B and a die 20B having a desired shape to carry out bore-expansion drawing again, thereby obtaining a tubular rotary component 100B.
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