Punchless blanking of an amorphous alloy

Sano, Takeshi; Takahashi, Masaharu; Murakoshi, Y.; Matsuno, Kenichi; Takeishi, Hiroyuku

doi:10.1016/0924-0136(92)90225-h

Cited by 14 publications

(4 citation statements)

References 1 publication

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“…In approach (ⅱ), the cutting of the amorphous alloy foil has been attempted with the development of mold processing machines and technologies [24][25][26][27][28][29][30]. Ref.…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of Switched Reluctance Motor Made by Blanking Amorphous Alloy Foil

et al. 2022

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This study reveals the characteristics of switched reluctance motors (SRMs) made by blanking (a) 20HX1300 of high grade lowiron-loss silicon steel (0.20mm thickness) and (b) 2605SA1 of amorphous alloy (0.025mm thickness). The blanking of the amorphous alloy is an innovative technology for the mass production of the high efficiency amorphous-alloy-motor. The impact of the processing methods on the magnetic properties are evaluated using the ring cores processed by the following methods: the wire cutting and the blanking. On the other hand, the experiment with the SRMs processed by the blanking evaluates the characteristics depending on the material. As first prototype, 70W-SRM (40mm thickness) is manufactured by blanking 1600 sheets of the amorphous alloy and adhesively laminating them. In the experiment, the motor efficiency of the amorphous-alloy-SRM is improved by 6.9 p.t. compared with that of silicon-steel-SRM. In addition, the iron loss of amorphous-alloy-SRM is reduced by 78.7% compared with that of silicon-steel-SRM.

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“…In approach (ⅱ), the cutting of the amorphous alloy foil has been attempted with the development of mold processing machines and technologies [24][25][26][27][28][29][30]. Ref.…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of Switched Reluctance Motor Made by Blanking Amorphous Alloy Foil

et al. 2022

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“…FeSiB foil metallic glass (FMG) is a promising material for the magnetic core due to its superior magnetic properties, such as micro-level thickness, low core loss and high permeability (Ohta and Hasegawa, 2017) (Ogawa et al, 2006) (Herzer et al, 1990). Nearly 10 6 °C/s quenching cooling rate is applied to its solidification process to promise the amorphous matrix in the as-cast foil, which leads to extremely high strength and hardness which challenge its cutting process by severe tool wear in punching (Sano et al, 1992)(F. Takahashi, T. Nishimura, I. Suzuki, 1991) or milling operations (Fang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Grinding performance and delamination analysis of FeSiB metallic glass laminate

Fang

Nagato

Sugita

et al. 2021

JAMDSM

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FeSiB metallic glass laminate is a state-of-the-art structure for magnetic core. Extremely high strength and hardness due to the amorphous matrix challenge its finishing process with severe tool wear and delamination. Meanwhile, grinding heat leads to crystallization of the material resulting in a magnetic deterioration. In this work, grinding data is presented for grind wheel wear, grinding force and surface quality when routing 7 mm thick FeSiB metallic glass laminate using electroplated CBN grinding points. Grinding experiments are carried out with grinding speeds of 0.5 and 1.5 m/s. Energy dispersive x-ray spectroscopy (EDS) and electron back scattered diffraction pattern (EBSD) analyses are conducted to inspect the delamination between the metallic foil layers and detailed microstructure of machined surface, respectively. The relation between the grinding force and delamination is discussed associated with the identification of crystallization condition near machined surface. As a result, severe plastic deformation between the layers and crystallization are identified which deteriorated the magnetic performance by inter-laminate circuit short and plastic strain. Load-displacement curve from nanoindentation confirmed the strain hardening level near machined surface.

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“…As such methods, punching with plastic sheet media by electromagnetic impact force 1) and punching with aqueous media by explosion of explosives 2) have been proposed and studied. We also reported a method of punching aluminum sheets using PVA gel as a working medium.…”

Section: Introductionmentioning

confidence: 99%

Effect of Amount of Fuel for Punchability in Punchless Impact Punching by Compression Ignition

Katoh

2021

Mater. Trans.

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In this study, punchless punching by the compression ignition of octane and the effect of varying the amount of fuel on punchability were investigated. In the experiment, the compression in compression ignition was applied using a drop hammer. As the amount of fuel increased, the variation in the initial height of the hammer required for completing the piercing could be divided into the following four parts of the basis on the amount of fuel. In the first part, corresponding to the smallest amount of fuel, the height exhibited a large decrease. In the second part, the height decreased by a small amount. In the third part, the height increased. Finally, in the fourth part, corresponding to the largest amount of fuel, the height remained constant. The four parts were believed to be caused by differences in the chemical reactions. Moreover, the optimum amount of fuel for punching was the largest amount of fuel under the conditions of the first part.

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Punchless blanking of an amorphous alloy

Cited by 14 publications

References 1 publication

Experimental Evaluation of Switched Reluctance Motor Made by Blanking Amorphous Alloy Foil

Experimental Evaluation of Switched Reluctance Motor Made by Blanking Amorphous Alloy Foil

Grinding performance and delamination analysis of FeSiB metallic glass laminate

Effect of Amount of Fuel for Punchability in Punchless Impact Punching by Compression Ignition

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