Title:
溝形鋼の製造方法および溝形鋼
Document Type and Number:
Japanese Patent JP7428899
Kind Code:
B2
Abstract:
To provide a method for manufacturing channel steel in which groove parts can be formed so that heights and widths of the groove parts are equal without causing rupture of the groove parts in a manufacturing line, and channel steel.SOLUTION: Each rolling machine performs rolling so that a portion to be formed into a web is positioned below a portion to be formed into a flange. An edger rolling machine 13 performs rolling while holding a tip of the flange and an inner side of the flange and releasing an outer side of the flange, using a punching mold in which angles of groove-surface forming parts 31b and 31c gradually vary and which comprises an upward-convex curve surface 31e and a downward-convex curve surface 31f. A finishing universal rolling machine 13 performs rolling while holding the tip of the flange and both sides of the flange, using a rolling roll having a punching mold in which angles of groove-surface forming parts 33b and 33c gradually vary and which comprises an upward-convex curve surface 33e and a downward-convex curve surface 33f.SELECTED DRAWING: Figure 2
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Inventors:
Takashi Kashiwano
Kazunori Seki
Kazunori Seki
Application Number:
JP2020132222A
Publication Date:
February 07, 2024
Filing Date:
August 04, 2020
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B21B1/088; B21B1/095; B21B27/02
Domestic Patent References:
| JP2013031876A | ||||
| JP60173243A | ||||
| JP60162504A | ||||
| JP53144860A | ||||
| JP61159204A | ||||
| JP49082556A | ||||
| JP51080663A | ||||
| JP51093771A | ||||
| JP10235415A | ||||
| JP2001001003A | ||||
| JP54026021A | ||||
| JP50077260A | ||||
| JP60196241A | ||||
| JP11058000A |
Attorney, Agent or Firm:
Mitsuo Kuribayashi
Nobuhiro Nitta
Kuribayashi Kazuki
Atsushi Miura
Nobuhiro Nitta
Kuribayashi Kazuki
Atsushi Miura