Title:
STEEL STRIP NOTCHING METHOD, COLD ROLLING METHOD, AND COLD ROLLED STEEL STRIP MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/106543
Kind Code:
A1
Abstract:
Provided is a steel strip notching method that can suppress decrease in the lifetime of a tool and that exhibits the effect of excellent suppression of chattering vibrations when, after forming notches at ends of a joint part in a sheet width direction, removing at least a portion of a region of each of the notches by grinding. This steel strip notching method is for, after forming notches at ends of in a joint part that are in a sheet width direction and that are obtained by joining the rear end of a preceding steel strip and the leading end of a subsequent steel strip, removing at least a portion of a region of each of the notches by grinding. The steel strip notching method involves, by using a rotary grinding tool, feeding the rotary grinding tool in the sheet width direction to notch the region, feeding, in a direction perpendicular to the steel strip, the rotary grinding tool at a feed speed in a predetermined range with respect to the feed speed of the rotary grinding tool in the sheet width direction, feeding, in concurrence with the feeding, the rotary grinding tool by a predetermined feed distance in the sheet width direction, and simultaneously imparting a predetermined feed distance in a steel strip longitudinal direction, and performing grinding to notch the region while oscillating the rotary grinding tool in the steel strip longitudinal direction, so as to remove the region.
Inventors:
NAGAI YUU (JP)
SUEHIRO RYUICHI (JP)
HOSOYA RYOTA (JP)
SUEHIRO RYUICHI (JP)
HOSOYA RYOTA (JP)
Application Number:
PCT/JP2020/041809
Publication Date:
June 03, 2021
Filing Date:
November 10, 2020
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21B15/00; B21B1/22
Domestic Patent References:
| WO2017141616A1 | 2017-08-24 |
Foreign References:
| JP2018089670A | 2018-06-14 | |||
| JP2014050853A | 2014-03-20 | |||
| JP2017144467A | 2017-08-24 |
Other References:
See also references of EP 4043113A4
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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