Title:
異形断面条の製造方法
Document Type and Number:
Japanese Patent JP4451493
Kind Code:
B2
Abstract:
A method for producing a contour strip includes a rough rolling step for rolling a plate material to form a contour molding material, a slitting step for slitting the contour molding material at the middle position in the width direction of a thick portion or a thin portion at both side edge portions thereof to form a contour slit material, and a stretching step for stretching the contour slit material to obtain a contour strip. Rolling is carried out in the rough rolling step so that t is 0.01 or less, e is 0.15 or less, D1 is 0.4 or less, and a rough rolling management value X determined by t×e×D1 is 5×10 -4 or less, assuming the deviation of plate thickness at a thin portion from a target value is t (mm), an actual measurement of the radius of curvature at a corner formed by the side surface and the top surface of a tick portion is e (mm), and an actual measurement of curvature per meter-length of the contour molding material is D1 (mm), the contour molding material is cut in the slitting step so that an actual measurement |A-B| (mm) of the difference in the width from the side edge of the thick portion or thin portion between both side edge portions is 0.08 or less, and the contour slit material is stretched in the stretching step so that an actual measurement D2 (mm) of curvature per meter-length of the contour molding strip is 0.13 or less.
Inventors:
Ken Sakurai
Sukumo Shun Midori
Shinya Koike
Sukumo Shun Midori
Shinya Koike
Application Number:
JP2009539958A
Publication Date:
April 14, 2010
Filing Date:
May 20, 2009
Export Citation:
Assignee:
Mitsubishi Shindoh Co., Ltd.
International Classes:
B21B1/08; B21B27/02; B21H8/00
Domestic Patent References:
| JP2826936B2 | 1998-11-18 | |||
| JPS5236512B2 | 1977-09-16 | |||
| JPH06285572A | 1994-10-11 | |||
| JP3341610B2 | 2002-11-05 |
Attorney, Agent or Firm:
Masakazu Aoyama