Stamping device

Patent metadata

Field	Value
Publication number	US-10744548-B2
Application number	US-201815908027-A
Country	US
Kind code	B2
Filing date	Feb 28, 2018
Priority date	Mar 7, 2017
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

A stamping device has: a die seat that a metal sheet, as a workpiece, abuts; and a stamping punch configured to stamp a character to be stamped onto a front surface of the metal sheet by pressing the stamping punch onto a stamped region of the metal sheet from the front surface side of the metal sheet. A stamp-receiving region that corresponds to the stamped region is provided on a front surface of the die seat, and, in this stamp-receiving region, plural dents are provided in such a manner as to correspond to the stamped region of the single character to be stamped.

First claim

What is claimed is:

1. A stamping device comprising:
a die seat that a metal sheet, as a workpiece, abuts; and
a stamping punch configured to stamp a character to be stamped onto a front surface of the metal sheet by pressing the stamping punch onto a stamped region of the metal sheet from a front surface side of the metal sheet, wherein
a stamp-receiving region that corresponds to the stamped region, the stamp-receiving region being provided on a front surface of the die seat, and
in the stamp-receiving region, a plurality of dents is provided in such a manner as to correspond to the stamped region of the character to be stamped,
in a front view of the front surface of the die seat in a state where the metal sheet abuts the front surface of the die seat, the stamp-receiving region of the die seat is defined as a region having an outer edge that is located on an outer side of an outer edge of the stamped region by a specified dimension,
a portion of the plurality of dents is provided between the outer edge of the stamp-receiving region and the outer edge of the stamped region.

2. The stamping device according to claim 1 , wherein
a plurality of the characters to be stamped are stamped on the front surface of the metal sheet,
the stamped region of the metal sheet is a region where the plurality of the characters to be stamped is stamped.

3. The stamping device according to claim 1 , wherein
each of the dents has a circular shape in the front view of the front surface of the die seat, a diameter of each of the dents is smaller than half a height dimension of the character to be stamped, and the dents are arranged such that the dents that are adjacent to each other do not overlap each other.

4. The stamping device according to claim 3 , wherein
the diameter of each of the dents has a value that is within a range from ⅓ to 1/12 of the height dimension of the character to be stamped, and a spacing dimension between the dents that are adjacent to each other is set to have a smaller value than the diameter.

5. The stamping device according to claim 3 , wherein
the diameter of each of the dents has a value that is within a range from ¼ to 1/10 of the height dimension of the character to be stamped, and a spacing dimension between the dents that are adjacent to each other is set to have a smaller value than the diameter.

6. The stamping device according to claim 3 , wherein
each of the dents has a conical shape.

7. A stamping device comprising:
a die seat that a metal sheet, as a workpiece, abuts; and
a stamping punch configured to stamp a character to be stamped onto a front surface of the metal sheet by pressing the stamping punch onto a stamped region of the metal sheet from a front surface side of the metal sheet, wherein
a stamp-receiving region that corresponds to the stamped region is provided on a front surface of the die seat,
in the stamp-receiving region, a plurality of dents is provided in such a manner as to correspond to the stamped region of the character to be stamped, and
each of the dents has a circular shape in the front view of the front surface of the die seat, a diameter of each of the dents is smaller than half a height dimension of the character to be stamped, and the dents are arranged such that the dents that are adjacent to each other do not overlap each other,
a portion of the plurality of dents is provided between the outer edge of the stamp-receiving region and the outer edge of the stamped region.

8. The stamping device according to claim 7 , wherein
the diameter of each of the dents has a value that is within a range from ⅓ to 1/12 of the height dimension of the character to be stamped, and a spacing dimension between the dents that are adjacent to each other is set to have a smaller value than the diameter.

9. The stamping device according to claim 7 , wherein
the diameter of each of the dents has a value that is within a range from ¼ to 1/10 of the height dimension of the character to be stamped, and a spacing dimension between the dents that are adjacent to each other is set to have a smaller value than the diameter.

10. The stamping device according to claim 7 , wherein
each of the dents has a conical shape.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kitamura Yoshitsugu

Classifications

• B41K3/40 Primary

  for numerical or alphabetical characters · CPC title

• B21D22/04 Primary

  for dimpling (combined with perforating B21D28/24) · CPC title

• B21D37/10

  Die sets; Pillar guides · CPC title

• B21D13/04

  by rolling · CPC title

• B21D22/08 Primary

  with die parts on rotating carriers · CPC title