Laminated body manufacturing method

#The present invention relates to a laminated body manufacturing apparatus and a laminated body manufacturing method for manufacturing an annular laminated body in which each layer is defined by a plurality of segments.

#There is known a motor core which is manufactured as a laminated body by laminating several tens to several hundreds of a ring-shaped thin plate member obtained by pressing an electromagnetic steel sheet. The thickness of the thin plate member is about 0.15 to 0.5 mm. It is considered that the thinner the thickness is, the better the energy efficiency is. Further, it is also known that the ring-shaped thin plate member is configured by a plurality of arc-shaped thin plate members, in order to effectively use the material of the motor core.

#For example, Patent Document 1 discloses an apparatus for manufacturing a laminated iron core by configuring one ring-shaped thin plate member with a plurality of fan-shaped segments, laminating a plurality of the thin plate members and coupling the thin plate members to each other. A central angle of the fan-shaped segment is 360°/n and one ring-shaped thin plate member is configured by “n” segments. The ring-shaped thin plate members of each layer adjacent to each other are laminated in an offset manner so that each arc-shaped segment configuring each thin plate member is stacked to be shifted from each other like a brick-laying.

#FIG. 1 is a view showing a state where a laminated body is manufactured by a laminated body manufacturing apparatus according to a first exemplary embodiment.

#FIG. 2 is a sectional view taken along a line II-II of FIG. 1, showing a part of a laminating guide and a cutting unit of the laminated body manufacturing apparatus shown in FIG. 1.

#FIGS. 3 (a) to (g) are views showing a state where an annular layer is formed in the laminated body manufacturing apparatus shown in FIG. 1.

#Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. Here, the exemplary embodiments are examples of an embodiment for carrying out the present invention and not intended to limit the present invention. It should be noted that all the features and their combinations described in the exemplary embodiments are not necessarily considered as essential to the present invention.

#FIG. 1 shows a state where a laminated body is manufactured by a laminated body manufacturing apparatus according to a first exemplary embodiment. This laminated body is used as a stator core. As shown in FIG. 1, the laminated body is manufactured by configuring one annular layer 1020 with three fan-shaped segments 1021 obtained by processing a band-like sheet material 1010 and laminating a predetermined number of annular layers 1020.

#As shown in FIG. 1, a laminated body manufacturing apparatus includes a feeding unit 1030 and a cutting unit 1040. The feeding unit 1030 intermittently feeds the sheet material 1010 at a predetermined feeding pitch in the Y direction so that each part to be processed on the sheet material 1010 is sequentially positioned in each of processing positions A to F. The cutting unit 1040 forms the segments 1021 by a cutting processing in a final processing position F and couples the segments to the annular layer 1020 located below.