Manufacturing method for laminated iron cores

Abstract

To provide a manufacturing method of a laminated iron core useful for reducing lamination deviation.SOLUTION: A manufacturing method of a laminated iron core includes: a formation step of forming a plurality of iron core members by punching out a metal plate along a predetermined shape; and a lamination step of laminating the plurality of iron core members on a jig having a first positioning part and a second positioning part arranged on positions different from each other in a circumferential direction around a predetermined axis. The first positioning part regulates a position in the circumferential direction of a first portion of each of the plurality of iron core members. The second positioning part regulates a position in the circumferential direction of a second portion of each of the plurality of iron core members. In the lamination step, the plurality of iron core members are laminated on the jig so that gaps may be provided between the first portion and the first positioning part, and the second portion and the second positioning part.SELECTED DRAWING: Figure 5

Claims

[Claim 1] A forming step of forming a plurality of iron core members, The process includes a lamination step of stacking the plurality of iron core members on a jig having a first positioning part and a second positioning part arranged at mutually different positions in the circumferential direction around a predetermined axis, Each of the aforementioned plurality of iron core members is either a block body composed of multiple punched members formed by punching out a metal plate along a predetermined shape, or a single punched member formed by punching out a metal plate along a predetermined shape. The first positioning unit restricts the position of the first portion of each of the plurality of core members in the circumferential direction. The second positioning unit restricts the position of the second portion of each of the plurality of core members in the circumferential direction. In the lamination process, the plurality of iron core members are laminated on the jig such that gaps are provided between the first portion and the first positioning portion, and between the second portion and the second positioning portion. A method for manufacturing a laminated iron core, wherein the first positioning portion and the second positioning portion are each formed such that the cross-sectional shape perpendicular to the axis extends along the radial direction of a circle centered on the axis. [Claim 2] A forming step of forming a plurality of iron core members, The process includes a lamination step of stacking the plurality of iron core members on a jig having a first positioning part and a second positioning part arranged at mutually different positions in the circumferential direction around a predetermined axis, Each of the aforementioned plurality of iron core members is either a block body composed of multiple punched members formed by punching out a metal plate along a predetermined shape, or a single punched member formed by punching out a metal plate along a predetermined shape. The first positioning unit restricts the position of the first portion of each of the plurality of core members in the circumferential direction. The second positioning unit restricts the position of the second portion of each of the plurality of core members in the circumferential direction. In the lamination process, the plurality of iron core members are laminated on the jig such that gaps are provided between the first portion and the first positioning portion, and between the second portion and the second positioning portion. Each of the aforementioned plurality of core members includes a yoke portion formed in an annular shape and a plurality of teeth portions extending intersecting the yoke portion, The first part is a pair of adjacent first teeth portions among the plurality of teeth portions, The second part is a pair of adjacent second teeth portions among the plurality of teeth portions, The first positioning portion is formed to be located between the pair of first teeth portions in the circumferential direction when the plurality of iron core members are stacked on the jig. A method for manufacturing laminated iron cores, wherein the second positioning portion is formed to be located between the pair of second teeth portions in the circumferential direction when the plurality of iron core members are laminated on the jig. [Claim 3] A forming step of forming a plurality of iron core members, The process includes a lamination step of stacking the plurality of iron core members on a jig having a first positioning part and a second positioning part arranged at mutually different positions in the circumferential direction around a predetermined axis, Each of the aforementioned plurality of iron core members is either a block body composed of multiple punched members formed by punching out a metal plate along a predetermined shape, or a single punched member formed by punching out a metal plate along a predetermined shape. The first positioning unit restricts the position of the first portion of each of the plurality of core members in the circumferential direction. The second positioning unit restricts the position of the second portion of each of the plurality of core members in the circumferential direction. In the lamination process, the plurality of iron core members are laminated on the jig such that gaps are provided between the first portion and the first positioning portion, and between the second portion and the second positioning portion. Each of the aforementioned plurality of core members includes a yoke portion formed in an annular shape and a plurality of teeth portions extending intersecting the yoke portion, The first part is the first tooth portion among the plurality of tooth portions, The second part is the second tooth portion among the plurality of tooth portions, The first positioning portion is formed to sandwich the first teeth portion in the circumferential direction when the plurality of iron core members are stacked on the jig. A method for manufacturing laminated iron cores, wherein the second positioning portion is formed to sandwich the second teeth portion in the circumferential direction when the plurality of iron core members are laminated on the jig. [Claim 4] The manufacturing method according to any one of claims 1 to 3, further comprising a welding step of welding the plurality of iron core members in a stacked state on the jig. [Claim 5] The manufacturing method according to any one of claims 1 to 3, wherein, in a state in which the plurality of iron core members are stacked on the jig, the size of the gap between the first portion and the first positioning portion is substantially the same as the size of the gap between the second portion and the second positioning portion. [Claim 6] The manufacturing method according to any one of claims 1 to 3, wherein the lamination step includes stacking the plurality of core members on the jig while relatively shifting the reference positions of each of the plurality of core members in the circumferential direction.

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