Device and method for manufacturing laminated iron core
A technology for manufacturing devices and laminated iron cores, which is applied in the field of manufacturing devices for laminated iron cores, can solve the problems of complex devices, increased device costs, and adverse effects on the operation of rotating motors, and achieve the effect of preventing burrs and simple structure
Inactive Publication Date: 2014-12-24
KURODA PRECISION INDS
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Problems solved by technology
[0007] However, if the above-mentioned burrs come off from the iron core sheet, it may adversely affect the operation of the rotating electric machine, etc.
In this case, it is conceivable to avoid the insertion of the cutting punch into the metering hole by providing the same cam mechanism as the metering punch for the cutting punch (that is, not punching the iron core sheet corresponding to the bottom layer). Cut action), but there is a problem that the device becomes complicated and the cost of the device increases
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[0059] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0060] figure 1 It is a schematic structural diagram of the jump die device of the embodiment of the present invention, figure 2 is showing about figure 1 The diagram of the strip layout of the skip mold device, image 3 is a cross-sectional view showing a laminated iron core manufactured by a jump die device. in addition, figure 2 Each process (1) to (5) in the strip layout in figure 1 Each part of the step-by-step mold device marked (1) to (5) is implemented.
[0061] Such as figure 1 As shown, the jump die device (laminated core manufacturing device) 1 manufactures a plurality of laminated core sheets 20 by performing metal stamping on a strip (band-shaped steel sheet) W made of an electrical steel sheet (see figure 2 ) made of laminated iron core 21 (refer to image 3 ). The jumping mold device 1 is mainly composed of an upper mold 2 arranged to reciproc...
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The present invention provides a device and a method for manufacturing laminated iron core. In the process of manufacturing the device for manufacturing laminated iron core through a rivet connection and multi-layer laminated manner, a rag in a meter hole caused by insertion of a cutting punch of a cutting part used for forming rivet joint is prevented. The device (1) comprises a metering hole forming portion (30) and a cutting forming portion (35). The metering hole forming portion (30) is provided with a metering punch (P2) that selectively carries out punching motion. Then, a metering hole (k1) is formed as a through hole for rivet joint on the lowermost iron core thin plate (10B) corresponding to the lowermost layer of the laminated iron core (21). The cutting forming portion (k1) is provided with a cutting punch (P4) that keeps punching. Thus, a cutting portion (k2) is formed as a convex-concave part for the rivet joint in the position corresponding to the metering hole on the other iron core thin plates (20) except the lowermost iron thin plate. The cutting punch is provided with a chamfer part formed at least a part of the periphery of the cutting edge part. The pairs of the cutting punches are inserted into the metering hole from the lowermost iron core thin plate.
Description
technical field [0001] The present invention relates to a manufacturing device and a manufacturing method of a laminated iron core formed by laminating a plurality of thin iron core plates. Background technique [0002] Conventionally, for laminated iron cores for rotating electric machines, a method of manufacturing a strip of electrical steel sheet (ribbon-shaped steel sheet) as a raw material using a skip die device has spread. In the jumping die device, the iron core sheet is continuously formed by punching the pilot hole, groove, tooth, etc. on the strip in sequence, and the predetermined number of iron core sheets punched out of the final shape Laminated and fixed to make a laminated core. As a method of fixing the iron core sheets, a so-called lamination riveting method is known, in which each iron core sheet is formed with concavities and convexities for riveting, and is crimped and bonded by pressing each other during lamination. [0003] In this lamination riveti...
Claims
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IPC IPC(8): H02K15/02
CPCH01F41/0233H02K15/02
Inventor 堀田俊雄荻久保智博
Owner KURODA PRECISION INDS