Method of manufacturing stacked core with adhesive

Patent metadata

Field	Value
Publication number	US-11196324-B2
Application number	US-201916447889-A
Country	US
Kind code	B2
Filing date	Jun 20, 2019
Priority date	Dec 22, 2016
Publication date	Dec 7, 2021
Grant date	Dec 7, 2021

Abstract

A method of manufacturing a stacked core includes: forming a stack by stacking a plurality of core members, each of the plurality of core members including one or more blanked members blanked by a die from a metal plate along a predetermined shape; removing one core member of the plurality of core members from the stack; supplying adhesive to the one core member removed from the stack; and stacking the one core member next to an adjacent core member of the plurality of core members so that the adhesive is placed between the one core member and the adjacent core member.

First claim

The invention claimed is:

1. A method of manufacturing a stacked core comprising:
blanking a metal plate along a predetermined shape to form a plurality of core members, each of the plurality of core members being one blanked member or being a block in which a plurality of blanked members are joined together;
forming a stack by stacking the plurality of core members inside of a die;
discharging the stack from the die after forming the stack;
removing one core member at a time from the stack after discharging the stack from the die;
separately supplying adhesive to each of the plurality of core members having been individually removed from the stack; and
stacking the plurality of core members outside of the die while supplying the adhesive so that the adhesive is placed between adjacent core members of the plurality of core members.

2. The method according to claim 1 , further comprising removing oil from the stack after discharging the stack from the die and before supplying the adhesive.

3. The method according to claim 2 ,
wherein removing oil from the stack includes annealing the stack.

4. The method according to claim 2 , wherein stacking the plurality of core members includes:
removing one core member at a time from the stack after the oil has been removed;
measuring a thickness of the one core member removed from the stack; and
stacking the plurality of core members while changing an orientation of the one core member based on the thickness of the one core member.

5. The method according to claim 1 , wherein forming the stack includes blanking the metal plate along a predetermined shape to form the plurality of core members, each of the plurality of core members having a temporarily-connecting tab, and stacking the plurality of core members while fastening the plurality of core members together via the temporarily-connecting tabs inside of the die, and
wherein the method further comprising separating the plurality of core members by removing, from the stack, the temporarily-connecting tabs after forming the stack and before supplying the adhesive.

6. The method according to claim 1 ,
wherein each of the plurality of core members includes a first through hole and a second through hole passing therethrough in a thickness direction of the stack, and
wherein stacking the plurality of core members includes stacking the plurality of core members on a jig including a first insertion pin having a shape corresponding to the first through hole and a second insertion pin having a shape corresponding to the second through hole so that the first insertion pin is inserted into the first through hole and the second insertion pin is inserted into the second through hole.

Assignees

• Mitsui High Tec

Inventors

• Matsubayashi Satoshi
• Matsunaga Yukio
• Hasuo Yusuke
• Eto Yusuke
• Nakayama Hayato

Classifications

• H02K15/021 Primary

  Magnetic cores · CPC title

• H02K1/16 Primary

  Stator cores with slots for windings · CPC title

• H01F41/02

  for manufacturing cores, coils, or magnets (H01F41/14 takes precedence; for dynamo-electric machines H02K15/00) · CPC title

• B21D28/02

  Punching blanks or articles with or without obtaining scrap (cutting nails or pins from strips or sheet material B21G3/26); Notching · CPC title

• H02K15/02

  of stator or rotor bodies · CPC title