PRESS DIE FOR WORK HARDENING OF METALLIC PLATE

Title:

PRESS DIE FOR WORK HARDENING OF METALLIC PLATE

Document Type and Number:

Japanese Patent JPS589725

Kind Code:

A

Abstract:

PURPOSE: To improve dent proofing property of a metallic plate and improve quality of coating face by work hardening one face of a metallic plate using a pair of press dies consisting of a die having a work projection on the face and a die having flat face of specified coarseness.

CONSTITUTION: Indentation is formed only on the back of a metallic plate using a pair of press dies consisting of a die having a work projection on the face and a die having a flat face of surface coarseness of 1W10μ, and work hardening is caused. By this way, oil applied on the metallic plate for lubrication or rust proofing can escape from small gaps formed by surface coarseness. Thus, generation of high oil pressure due to confinement of the oil is prevented, and formation of concavities on the surface of the metallic plate can be checked.

Inventors:

SUZUKI TAKATOSHI
TACHIKAWA HIDEO
MATSUI MUNEHISA
MORIMOTO TAKESHI
KASUYA MASA

Application Number:

JP10855681A

Publication Date:

January 20, 1983

Filing Date:

July 10, 1981

Export Citation:

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Assignee:

TOYODA CHUO KENKYUSHO KK
TOYOTA MOTOR CO LTD

International Classes:

B21D37/00; B21D22/02; (IPC1-7): B21D37/00

Domestic Patent References:

JP42022880A
JPS5557327A	1980-04-28

Attorney, Agent or Firm:

Yoshiyasu Takahashi

Next Patent: NBYI SUPERCONDUCTIVE WIRE