# US 2021/0276068 A1 · Metal member manufacturing method

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- Number: US 2021/0276068 A1
- Document ID: US20210276068A1
- Status: Published application
- Kind: A1
- Application number: 17/140,178
- Filed: 2021-01-04
- Published: 2021-09-09
- Earliest claimed: 2020-03-05
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Shunsuke TOBITA; Tetsuji EGAWA; Masahide TATSUTOMI
- Web page: https://patentgrep.com/patent/US20210276068A1

## CPC

- B21D 22/04: for dimpling (combined with perforating B21D28/24)
- B21D 28/26: in sheets or flat parts
- B21K 23/00: Making other articles
- B23D 1/08: by movement of the tool
- B23P 15/00: Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B21D 35/006: {Blanks having varying thickness, e.g. tailored blanks}
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)
- B21K: MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS (making particular articles by working sheet metal without essentially removing material B21D; processing wire B21F; making pins, needles or nails B21G; making particular articles by rolling B21H; forging machines, pressing machines, hammering machines, in general B21J; making chains B21L; plating B23K)
- B23D: PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR (making toothed gears or the like B23F; cutting metal by applying heat locally B23K; arrangements for copying or controlling B23Q)
- B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q)

## Abstract

A metal member manufacturing method according to one form of this disclosure is a method of manufacturing a metal member that is thinner at some portions than at other portions. The method includes a formation step of pressing one surface of surfaces of a metal workpiece that are perpendicular to a thickness direction with a press-working die so as to form a raised portion in the other surface, and a cutting step of moving a cutting blade along the other surface to cut off the raised portion by shaving. In the formation step, the raised portion is formed such that the area of a cross-section of the raised portion that is parallel to a moving direction of the cutting blade and perpendicular to the other surface decreases toward an end of the raised portion on a rear side in the moving direction of the cutting blade.

## Claims

### Claim 1

A method of manufacturing a metal member that is thinner at some portions than at other portions, the method comprising:
a formation step of pressing one surface of surfaces of a metal workpiece that are perpendicular to a thickness direction with a press-working die so as to form a raised portion in the other surface; and
a cutting step of moving a cutting blade along the other surface to cut off the raised portion by shaving,
wherein in the formation step, the raised portion is formed such that an area of a cross-section of the raised portion that is parallel to a moving direction of the cutting blade and perpendicular to the other surface decreases toward an end of the raised portion on a rear side in the moving direction of the cutting blade.

### Claim 2 (depends on 1)

The metal member manufacturing method according to claim 1, wherein in the formation step, the raised portion is formed such that the area of the cross-section of the raised portion that is parallel to the moving direction of the cutting blade and perpendicular to the other surface decreases stepwise toward the end of the raised portion on the rear side in the moving direction of the cutting blade.

### Claim 3 (depends on 1)

The metal member manufacturing method according to claim 1, wherein in the formation step, the raised portion is formed such that the area of the cross-section of the raised portion that is parallel to the moving direction of the cutting blade and perpendicular to the other surface decreases along a curve toward the end of the raised portion on the rear side in the moving direction of the cutting blade.