Title:
渦巻きコイル積層体の製造方法、渦巻きコイル積層体の積み重ね体の製造方法
Document Type and Number:
Japanese Patent JP7089839
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide multiple layered coils hardly causing any trouble when unwinding copper pipes from coils wound in multiple layers as well as having a small variation of σ 0.2 for 0.2% yield strength values in the copper pipes within one coil.SOLUTION: A spiral coil laminate 1 is constituted of spiral coils of copper pipes 2 spirally wound and stacked in multiple layers in an extension direction of a center axis of the coil laminate 1, and comprises A layer spiral coils 3a and B layer spiral coils 3b. The A layer spiral coils 3a and the B layer spiral coils 3b are alternately repeated. The copper pipes of the spiral coils in the respective layers are wound with curvature radii configured to continuously change and a clearance between adjacent copper pipes configured to be smaller than a diameter of the copper pipe. It is characterized in that an absolute value of difference between an average of 0.2% yield strength values of an innermost copper pipe and an average of 0.2% yield strength values of an outermost copper pipe in the spiral coil laminate, (|σ0.2-σ0.2|), is 10 MPa or less.SELECTED DRAWING: Figure 1
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Inventors:
Kobayashi Kei
Kuroki Katsuhide
Kensuke Mizuto
Kuroki Katsuhide
Kensuke Mizuto
Application Number:
JP2016083730A
Publication Date:
June 23, 2022
Filing Date:
April 19, 2016
Export Citation:
Assignee:
NJT Copper Tube Corporation
International Classes:
B65H54/28; B65H49/02
Domestic Patent References:
| JP2014109040A | ||||
| JP6366072A | ||||
| JP10263076A | ||||
| JP3120987U |
Attorney, Agent or Firm:
Patent Business Corporation Ashitaba International Patent Office