CROSS REFERENCE TO RELATED APPLICATION(S)

This application is based upon and claims the benefit of priority of Japanese Patent Application No. 2018-224772 filed on Nov. 30, 2018, the contents of which are incorporated herein by reference in its entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present disclosure relates to a method and an apparatus for manufacturing a laminated iron core product.

2. Description of the Related Art

JP-A-2006-334648 as Patent Literature 1 discloses a method for manufacturing a laminated iron core. The method disclosed in JP-A-2006-334648 includes: intermittently feeding, from an uncoiler, a coil material, which is a strip-shaped metal plate wound in a coil shape (plate to be processed); punching the metal plate into a predetermined shape with a punch to form a plurality of punched members; and laminating the plurality of punched members to form an iron core body.

Patent Literature 1: JP-A-2006-334648

SUMMARY OF THE INVENTION

For the purpose of preventing wear of the punch and improving the punchability for the punched member, it is common that the coil material is coated with press working oil (also called stamping oil and simply referred to as “oil” hereinafter). When the laminate is subjected to a heat treatment (for example, welding) in a subsequent process while the oil is adhered to the laminate, soot may be generated, discoloration may occur in the laminate, blowholes (cavities) may be generated, or the strength of the welded portion may be lowered. Thus, it is common to volatilize most of the oil, for example, 1 day or longer, store the laminate in a storage location, and then subject the laminate to a heat treatment. However, cost may be required to secure the storage location, and the production efficiency (throughput) of the laminated iron core can be lowered.

Accordingly, the present disclosure describes a method for manufacturing a laminated iron core product capable of improving the welding quality when welding a laminate and an end surface plate.

A method for manufacturing a laminated iron core product according to an aspect of the present disclosure includes: laminating a plurality of iron core members which are punched from a first metal plate to form a laminate; removing oil adhering to the laminate; removing oil adhering to an end surface plate which is punched from a second metal plate; and disposing the end surface plate on an end surface of the laminate and welding the end surface plate and the laminate.

According to a method for manufacturing a laminated iron core product of the present disclosure, the welding quality can be improved when welding the laminate and the end surface plate.

There may be provided an apparatus for manufacturing a laminated iron core product, the apparatus including: a first punching device, configured to punch a first plate metal plate and laminate a plurality of iron core members to form a laminate; a first oil removing device, configured to remove oil adhering to the laminate; a second punching device, configure to punch a second metal plate to form an end surface plate; a second oil removing device, configured to remove oil adhering to the end surface plate; and a welding device, configured to dispose the end surface plate on an end surface of the laminate and weld the end surface plate and the laminate.

