METHOD AND DEVICE FOR MANUFACTURING LAMINATED IRON CORE

Title:

METHOD AND DEVICE FOR MANUFACTURING LAMINATED IRON CORE

Document Type and Number:

WIPO Patent Application WO/2017/154860

Kind Code:

A1

Abstract:

A method for manufacturing a laminated iron core, comprising manufacturing a laminated iron core by sequentially feeding electrical steel strips into a die having a plurality of punching steps in a state in which the electrical steel strips are superposed by being inserted in an upper/lower pair of feed rolls in the superposed state of the electrical steel strips, and punching the electrical steel strips at the same time in the die in a state in which the electrical steel strips are superposed, wherein feed rolls in which a top and a bottom feed roll are both driven by a drive device are used as the upper/lower pair of feed rolls 2a, 2b, and processing is performed in which superposed electrical steel strips 1a, 1b are partially or entirely joined before entering the die or in an early-stage portion of the die after the electrical steel strips 1a, 1b are delivered from the upper/lower pair of feed rolls 2a, 2b.

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Inventors:

SENDA KUNIHIRO (JP)
UESAKA MASANORI (JP)
ODA YOSHIHIKO (JP)

Application Number:

PCT/JP2017/008886

Publication Date:

September 14, 2017

Filing Date:

March 07, 2017

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

B21D28/02; B21D43/00; B21D43/09; H01F27/245; H01F41/02; H02K15/02

Foreign References:

JP2001016832A	2001-01-19
JP2012231590A	2012-11-22
JPS5239880A	1977-03-28
JPS4839615B1	1973-11-26

Other References: