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Patent Searching and Data


Title:
BAR-IN-COIL WINDING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/245953
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a bar-in-coil winding method with which a coil height can be reduced. In this bar-in-coil winding method for manufacturing a bar-in-coil by causing a bobbin extending in a vertical direction to rotate, and winding the wire rod while layering the winding wire rod from a lower side of the bobbin to an upper side thereof: the rotational speed of the bobbin is increased and decreased with a fixed period; the wire rod is wound at least one turn on the bobbin at a first rotational speed V1 represented by formula (3), including a lowest rotational speed Vmin, being the lowest rotational speed during one period in which the rotational speed is varied; and the wire rod is wound at least one turn on the bobbin at a second rotational speed V2 represented by formula (4), including a highest rotational speed Vmax, being the highest rotational speed during one period in which the rotational speed is varied. (3) ... Vmin≤V1≤Vmin+0.1×VW, (4) ... Vmax-0.1×VW≤V2≤Vmax

Inventors:
KOBASHI KOJI (JP)
NAKAMURA HIROYUKI (JP)
OOTANI YOSHINORI (JP)
Application Number:
PCT/JP2019/022387
Publication Date:
December 10, 2020
Filing Date:
June 05, 2019
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
B21C47/02
Foreign References:
JPS63154215A1988-06-27
JPS6142423A1986-02-28
JPH03118911A1991-05-21
JP2019098392A2019-06-24
Attorney, Agent or Firm:
TANAKA Hidetetsu et al. (JP)
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