JPS5785989A - Zinc electroplated steel plate forming star mark hardly during press working - Google Patents

Zinc electroplated steel plate forming star mark hardly during press working

Info

Publication number
JPS5785989A
JPS5785989A JP16278680A JP16278680A JPS5785989A JP S5785989 A JPS5785989 A JP S5785989A JP 16278680 A JP16278680 A JP 16278680A JP 16278680 A JP16278680 A JP 16278680A JP S5785989 A JPS5785989 A JP S5785989A
Authority
JP
Japan
Prior art keywords
steel plate
during press
star mark
press working
surface roughness
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP16278680A
Other languages
Japanese (ja)
Other versions
JPS5943997B2 (en
Inventor
Hirotake Ishitobi
Koji Yamato
Hideo Abe
Takeshi Koga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP16278680A priority Critical patent/JPS5943997B2/en
Publication of JPS5785989A publication Critical patent/JPS5785989A/en
Publication of JPS5943997B2 publication Critical patent/JPS5943997B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Electroplating Methods And Accessories (AREA)

Abstract

PURPOSE: To reduce the formation of a star mark on a zinc electroplated steel plate to the utmost during press forming by regulating the plated surface of the steel plate contacting with a punch surface to a prescribed value or above of surface roughness.
CONSTITUTION: A steel plate electroplated with zinc on one side or both sides is regulated to ≥1.5μm, rmS surface roughness by a method such as cold working with a rolling roll having a surface roughened by electric spark machining. The occurrence of a defect called a star mark is inhibited on the steel plate having the regulated surface roughness at the surface contacting with a punch during press working. Accordingly, the regulated surface roughness is very effective in enhancing the yield of products and the productivity.
COPYRIGHT: (C)1982,JPO&Japio
JP16278680A 1980-11-19 1980-11-19 Zinc-based electroplated steel sheet that does not easily generate stars during press processing Expired JPS5943997B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16278680A JPS5943997B2 (en) 1980-11-19 1980-11-19 Zinc-based electroplated steel sheet that does not easily generate stars during press processing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16278680A JPS5943997B2 (en) 1980-11-19 1980-11-19 Zinc-based electroplated steel sheet that does not easily generate stars during press processing

Publications (2)

Publication Number Publication Date
JPS5785989A true JPS5785989A (en) 1982-05-28
JPS5943997B2 JPS5943997B2 (en) 1984-10-25

Family

ID=15761175

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16278680A Expired JPS5943997B2 (en) 1980-11-19 1980-11-19 Zinc-based electroplated steel sheet that does not easily generate stars during press processing

Country Status (1)

Country Link
JP (1) JPS5943997B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS645604A (en) * 1987-06-30 1989-01-10 Sumitomo Metal Ind Method for skin pass rolling of cold rolled steel sheet

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055599Y2 (en) * 1987-05-20 1993-02-15

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS645604A (en) * 1987-06-30 1989-01-10 Sumitomo Metal Ind Method for skin pass rolling of cold rolled steel sheet
JPH0516921B2 (en) * 1987-06-30 1993-03-05 Sumitomo Metal Ind

Also Published As

Publication number Publication date
JPS5943997B2 (en) 1984-10-25

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