JPS5686609A - Manufacture of roll to be subjected to electric spark dulling work - Google Patents

Manufacture of roll to be subjected to electric spark dulling work

Info

Publication number
JPS5686609A
JPS5686609A JP16149879A JP16149879A JPS5686609A JP S5686609 A JPS5686609 A JP S5686609A JP 16149879 A JP16149879 A JP 16149879A JP 16149879 A JP16149879 A JP 16149879A JP S5686609 A JPS5686609 A JP S5686609A
Authority
JP
Japan
Prior art keywords
roll
work
electric spark
formula
dulling
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.)
Pending
Application number
JP16149879A
Other languages
Japanese (ja)
Inventor
Moroo Nakagawa
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP16149879A priority Critical patent/JPS5686609A/en
Publication of JPS5686609A publication Critical patent/JPS5686609A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/005—Rolls with a roughened or textured surface; Methods for making same
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/10—Roughness of roll surface

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Abstract

PURPOSE:To prevent a generation of the residual surface deformation, be hardening the roll surface to a compression yield strength higher than the value Pmax given by the formula. CONSTITUTION:The surface of the rolling roll, especially of the cold rolling roll, is hardened to the compression yield strength higher than a value Pmax given by the formula; after that, the electric spark dulling work is applied to the surface of this roll. In the formula, P is the rolling load, l is the length of contact of the roll, R1 is the radius of the roll to be dulled, R2 is the radius of its counter roll, upsilon1 is the Poisson's ratio of the roll to be dulled, upsilon2 is the Poisson's ratio of its counter roll, E1 is the Young's modulus of the work roll, and E2 is the Young's modulus of its counter work roll. The relation between the compression yield strength and hardness of 1% C - 3% Cr steel as the general roll material is shown in the figure; by which, if the stress caused in the roll surface under the working condition, is obtained, the hardness required of the roll subjected to the electric spark dulling work can be obtained.
JP16149879A 1979-12-14 1979-12-14 Manufacture of roll to be subjected to electric spark dulling work Pending JPS5686609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16149879A JPS5686609A (en) 1979-12-14 1979-12-14 Manufacture of roll to be subjected to electric spark dulling work

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16149879A JPS5686609A (en) 1979-12-14 1979-12-14 Manufacture of roll to be subjected to electric spark dulling work

Publications (1)

Publication Number Publication Date
JPS5686609A true JPS5686609A (en) 1981-07-14

Family

ID=15736204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16149879A Pending JPS5686609A (en) 1979-12-14 1979-12-14 Manufacture of roll to be subjected to electric spark dulling work

Country Status (1)

Country Link
JP (1) JPS5686609A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62137111A (en) * 1985-12-09 1987-06-20 Nippon Steel Corp Manufacture of cold rolled steel plate having excellent coating sharpness

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62137111A (en) * 1985-12-09 1987-06-20 Nippon Steel Corp Manufacture of cold rolled steel plate having excellent coating sharpness

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