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Miyagi, Japan

Kusuyama J.,Japan National Defense Academy | Yui A.,Japan National Defense Academy | Kitajima T.,Japan National Defense Academy | Itoh Y.,NS Tool Co.
Advanced Materials Research | Year: 2014

Carbon Fiber Reinforced Plastic (CFRP) is a high-strength and high-elastic-modulus composite material that is hardened by impregning carbon fiber with epoxy resin. Although, many sutdies of hole drilling of CFRP have been conducted, few sutdies of face milling of CFRP have been carried out. Face milling is necessary for surfaceing of aerospace parts, which is indispensable for airplane construction. Machining of CFRP is difficult because of the extreme tool wear and delamination that occur. The authors investigated face milling of CFRP using a newly developed Poly Crystalline Diamond (PCD) tool. The resultts show, that the cutting force and surface roughness are affected by the fiber orientation of the CFRP, and that delamination can easily occur in the outer layer of face-nilled CFRP. © (2014) Trans Tech Publications, Switzerland. Source


Suzuki H.,Chubu University | Suzuki H.,RIKEN | Okada M.,Chubu University | Fujii K.,NS Tool Co. | And 2 more authors.
CIRP Annals - Manufacturing Technology | Year: 2013

In order to machine micro aspheric ceramic molds precisely and efficiently, micro milling tools made of single crystalline diamond (SCD) are developed. Many cutting edges are fabricated 3-dimensionally on the edge of a cylindrical SCD by a laser beam. Flat binderless tungsten carbide mold was cut with the developed tool to evaluate the tool wear rate and its life. Some micro aspheric molds of tungsten carbide were cut with the tool at a rotational speed of 50,000 min-1. The molds were cut in the ductile mode. The form accuracy obtained was about 100 nm P-V and the surface roughness 12 nm Rz. © 2013 CIRP. Source


Ns

Trademark
NS Tool Co. | Date: 2004-04-13

TOOLS FOR CUTTING MACHINERY, NAMELY, END MILLS [ AND COLLET CHUCKS ].


Suzuki H.,Chubu University | Furuki T.,Chubu University | Okada M.,Chubu University | Fujii K.,NS Tool Co. | Goto T.,NS Tool Co.
International Journal of Automation Technology | Year: 2011

Micro milling tools made of PolyCrystalline Diamond (PCD) have been developed to machine ceramic micro dies and molds. Cutting edges are ground with diamond wheels. PCD milling tool wear is evaluated by cutting binder-less tungsten carbide spherical molds and machining structured surfaces for trial. Results of experiments clarified that PCD milling tool life is over 10 times that of resinoid diamond grinding wheels, and that form accuracy was 0.1 μm-0.3 μm P-V and surface roughness was 10 nm Rz. Source


Kitajima T.,Japan National Defense Academy | Kusuyama J.,Japan National Defense Academy | Yui A.,Japan National Defense Academy | Fujii K.,NS Tool Co. | Ito Y.,NS Tool Co.
Advanced Materials Research | Year: 2014

Interest in carbon-fiber-reinforced plastic (CFRP) has been growing for the last several years. CFRP, a composite material made of carbon fibers and resins, has high mechanical characteristics and is well known as a difficult-to-cut material. During the process of drilling or cutting of CFRP, tool wear and delamination occur frequently. In this study, the authors developed a milling tool for CFRP using polycrystalline diamond, and the cutting performance of the developed tool was investigated. © (2014) Trans Tech Publications, Switzerland. Source

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