Study on the High-Efficiency Smoothness Grinding of Soft Magnetic Powder Cores

Tomoyuki Ueno; Tomoyuki Ishimine; Kenji Matsunuma; Takao Nishioka; Yasushi Mochida; Yoshiyuki Shimada

doi:10.4028/www.scientific.net/AMR.565.10

Paper Titles

Preface, Sponsors and Organizing Committee

Ultrafine Surface Finishing of Fused Silica Glass Using MCF (Magnetic Compound Fluid) Wheel
p.3

Study on the High-Efficiency Smoothness Grinding of Soft Magnetic Powder Cores
p.10

Grinding Performance Using Alkaline Electrolyzed and High-Frequency Reduced Water
p.16

Study on Grinding Processing of Sapphire Wafer
p.22

Effect of the Grain Depth of Cut on Cross Sectional Profile - Theoretical Analysis of Ground Surface Roughness
p.28

Development of a Vitrified Bonded Superabrasive Wheel with Electrical Conductivity and its Application
p.34

Fundamental Study on Setting of Diamond Abrasive Grains Using Electrostatic Force for Single-Layered Metal Bond Wheel
p.40

Porous Composite-Bonded CBN Grinding Wheel with Alumina Bubbles
p.46

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 565Study on the High-Efficiency Smoothness Grinding...

Study on the High-Efficiency Smoothness Grinding of Soft Magnetic Powder Cores

Abstract:

Soft magnetic powder cores are materials manufactured by pressing pure iron powder covered with insulating film into shape. These are widely known soft magnetic materials which are used as essential electromagnetic conversion parts in automobiles and household appliances. In recent years, demand for higher magnetic properties and dimensional precision has been growing with respect to soft magnetic powder cores. It has therefore become necessary to develop a high-efficiency, high-precision finishing method. The issues to be addressed with regard to this kind of method are: (1) the pure iron used in these materials displays ductility resulting in burring and cohesion to machining tools, (2) these materials are green compacts with low binding forces between powder particles and high tendencies towards cracking and gouging, and (3) these materials possess residual pores at levels of several percent thus resulting in microscopically intermittent processing which causes heavy machining tool wear. We have solved these issues through the development of a super-smooth finishing method designed for soft magnetic powder cores.