Method for manufacturing band-shaped stator core sheets and die apparatus used therefor

Abstract

Provided are a method for manufacturing band-shaped stator core sheets, capable of efficiently separating the band-shaped stator core sheets having engaged magnetic pole pieces, and a die apparatus used therefor. The method comprises placing tips of magnetic pole pieces 12, 13 of first and second band-shaped stator core sheets 10, 11 on inner peripheries of yoke pieces 16, 15, a slot punching step for forming gaps of the magnetic pole pieces 12, 13, a shear-cutting step for cutting the tips of the magnetic pole pieces 12, 13 from the inner peripheries of the yoke pieces 16, 15, respectively, a correction step for returning the magnetic pole pieces 12, 13 bent by the shear-cutting step to their original states, and a separation step for separating the first and second band-shaped stator core sheets 10, 11 with the magnetic pole pieces 12, 13 pressed back by the correction step.

Description

technical field [0001] The present invention relates to a method for manufacturing a strip-shaped stator core sheet used for manufacturing a laminated core and a mold device used therefor, and more specifically, to a method for manufacturing a laminated body for forming a laminated core by winding it in a spiral shape. A method of manufacturing strip-shaped stator core laminations and a mold arrangement therefor. Background technique [0002] In the past, such as Figure 8 As shown in (A), there is a laminated core (for example, See Patent Document 1). When forming the strip-shaped core sheet 90, as Figure 8 As shown in (B), the two strip-shaped core pieces 90 are discharged onto the magnetic bar 92 with the magnetic pole pieces 91 engaged, and punched to form, thereby improving the yield of the material. [0003] However, if Figure 8 As shown in (B), since the two strip-shaped core pieces 90 are discharged on the magnetic bar 92 into the front end of each magnetic pole ...

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Problems solved by technology

[0011] In addition, when the front end of the magnetic pole piece 96 and the inner periphery of the yoke piece 97 are sheared within the elastic limit of the magnetic strip 98, there may be cases where the front end of the magnetic pole piece 96 tends to recover due to the tendency of the magnetic pole piece 96 to recover. Possibility of fitting into the inner circumference of the yoke piece part 97 due to the force of the original state

[0012] Thus, if the front end of the pole piece 96 is press-fitted into the inner circumference of the yoke piece 97, it may be difficult to mesh the pole pieces 96 when winding or winding the laminated strip-shaped core piece 95. The problem that the strip core pieces 95 are separated from each other

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