セラミックスの高速穴あけ加工 : 第1報,ドライアイス飛翔体の動的な力の作用による高速穴あけの可能性

概要

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The high-speed dynamic punching technology to produce circular holes perpendicular to the plane surfaces through the thicknesses of ceramics specimen plates was investigated. The specimens were sandwiched between a pressure plate and a die of a punching jig and were pressed on both the top and bottom surfaces. High-speed stresses given by a dry ice flier delivered from a gas gun were applied by a columnar punch to the specimens and the holes were produced by shearing between the edges of the punch and the die. The specimens were punched feasibly by the constant surface pressure with most size of the clearance between the punch and the die in the radial direction, but the pressure increased rapidly as the clearance approached zero. The characteristics of the profiles on sheared surfaces for the thickness direction, electron fractography of fracture surfaces and strength of the punched plates were examined. The stress was analyzed by the finite-element method to discuss the relations between shearing stress distributions and the profiles or to examine the relation between the surface pressures and moments of shearing stresses through the thicknesses of the punched surfaces.
一般社団法人日本機械学会の論文
1994-09-25