Damage evaluation device and damage evaluation method for press-forming die

Patent metadata

Field	Value
Publication number	US-2024123700-A1
Application number	US-202218276370-A
Country	US
Kind code	A1
Filing date	Mar 4, 2022
Priority date	Mar 16, 2021
Publication date	Apr 18, 2024
Grant date	—

Abstract

A damage evaluation device for a press-forming die includes: evaluation dies installed in a pressing device configured to press-form a metal material; and an observation device configured to observe damage behavior of a die steel material and surface coating constituting the evaluation dies. The evaluation dies include: a perforating unit configured to form a hole in the metal material; a first shearing unit configured to shear the metal material in which the hole is formed into a predetermined metal component shape; and a second shearing unit configured to separate a metal component from the metal material, and dies of the perforating unit, the first shearing unit and the second shearing unit are formed of the die steel material and have a structure that enables replacement with another die made of predetermined material and applied with predetermined surface coating treatment.

First claim

1 . A damage evaluation device for a press-forming die, the damage evaluation device comprising:
evaluation dies installed in a pressing device configured to press-form a metal material; and an observation device configured to observe damage behavior of a die steel material and surface coating constituting the evaluation dies, wherein the evaluation dies include:
a perforating unit configured to form a hole in the metal material;
a first shearing unit configured to shear the metal material in which the hole is formed into a predetermined metal component shape; and
a second shearing unit configured to separate a metal component from the metal material, and
dies of the perforating unit, the first shearing unit and the second shearing unit are formed of the die steel material and have a structure that enables replacement with another die made of predetermined material and applied with predetermined surface coating treatment.

2 . The damage evaluation device for a press-forming die according to claim 1 , wherein
the evaluation dies include:
a press-forming unit configured to press-form the metal material after shearing by the first shearing unit into a shape having a hat-shaped cross-section, the shape having a top portion face, vertical wall portions continuous with the top portion face, and flange portions continuous with the vertical wall portions; and
a third shearing unit configured to shear a part of the flange portions,
dies of the press-forming unit and the third shearing unit are formed of the die steel material and have a structure that enables replacement with another die made of predetermined material and applied with predetermined surface coating treatment, and the second shearing unit is configured to separate a metal component having the shape having the hat-shaped cross-section from the metal material after shearing by the third shearing unit.

3 . The damage evaluation device for a press-forming die according to claim 2 , wherein the shape having the hat-shaped cross-section has a protruding shape on one of the vertical wall portions.

4 . A damage evaluation method for a press-forming die, the damage evaluation method comprising:
a step of observing damage behavior of a die steel material and surface coating constituting evaluation dies after press-forming is repeated on a metal material for predetermined number of times using the evaluation dies installed in a pressing device, wherein the evaluation dies include:
a perforating unit configured to form a hole in the metal material;
a first shearing unit configured to shear the metal material in which the hole is formed into a predetermined metal component shape; and
a second shearing unit configured to separate a metal component from the metal material, and
dies of the perforating unit, the first shearing unit and the second shearing unit are formed of the die steel material and have a structure that enables replacement with another die made of predetermined material and applied with predetermined surface coating treatment.

5 . The damage evaluation method for a press-forming die according to claim 4 ,
wherein the evaluation dies include:
a press-forming unit configured to press-form the metal material after shearing by the first shearing unit into a shape having a hat-shaped cross-section, the shape having a top portion face, vertical wall portions continuous with the top portion face, and flange portions continuous with the vertical wall portions; and
a third shearing unit configured to shear a part of the flange portions,
dies of the press-forming unit and the third shearing unit are formed of the die steel material and have a structure that enables replacement with another die made of predetermined material and applied with predetermined surface coating treatment, and the second shearing unit is configured to separate a metal component having the shape having the hat-shaped cross-section from the metal material after shearing by the third shearing unit.

6 . The damage evaluation method for a press-forming die according to claim 5 , wherein the shape having the hat-shaped cross-section has a protruding shape on one of the vertical wall portions.

Assignees

• Jfe Steel Corp

Inventors

• Miyake Hiroto

Classifications

• B30B11/005

  Control arrangements · CPC title

• B30B11/022

  whereby the material is subjected to vibrations · CPC title

• B30B15/34

  Heating or cooling presses or parts thereof · CPC title

• B30B15/064

  with heating or cooling means · CPC title

• B30B15/28 Primary

  Arrangements for preventing distortion of, or damage to, presses or parts thereof · CPC title