Miyagi, Japan
Miyagi, Japan

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Suzuki H.,Chubu University | Okada M.,Chubu University | Kato E.,Kato Clinic Implant Center | Yamada M.,Tohoku University | And 2 more authors.
Proceedings of the 16th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2016 | Year: 2016

Ti alloy has been conventionally used for parts of air plane or chemical equipment, because it is tough and has low specific gravity, and has high anti-corrosion characteristic. Furthermore, the material is very flexible to human living body cells and there are few allergic reactions as a medical application. These characteristics of Ti alloy are most suitable for a dental implant or a total hip prosthesis, and recently a lot of Ti alloy has been used for many medical applications. Furthermore, generation of textured surface of several micron meter level on the dental implant of Ti alloy is extremely effective to improve the fusion characteristics of the living body cell from the recent dental studies. However, Ti alloy is a difficult to machine material, the tool wear is extremely high and precision texturing by cutting is very difficult. In this study, Ti alloy was face turned by some kind of tool materials such as single crystal diamond, cBN, tungsten carbide and CVD-SiC, and the tool wear characteristics and surface roughness changes were evaluated experimentally. Finally cutting tests of micro textured patterns were carried out by the fabricated micro cutting tool of polycrystalline cBN (PCBN) tool and feasibility of the micro tool for the texturing was studied.


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.


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.


Kitajima T.,Japan National Defense Academy | Horiuchi T.,Japan National Defense Academy | Yui A.,Japan National Defense Academy | Ito Y.,NS Tool Co.
Materials Science Forum | Year: 2016

Carbon-fiber-reinforced plastic (CFRP) is used in various industries such as aerospace and automobile industries because of its high mechanical characteristics. However, this material is difficult to cut. Tool wear and delamination frequently occur during the drilling or cutting of CFRP. In previous studies, we developed a CFRP cutting tool using polycrystalline diamond (PCD). The PCD tool exhibited excellent cutting performance at cutting speeds as low as <120 m/min. In this study, the authors investigated the effect of cutting speed on the face milling of CFRP by using the developed PCD tool. © 2016 Trans Tech Publications, Switzerland.


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.


Suzuki H.,Chubu University | Okada M.,Chubu University | Okada K.,NS Tool Co. | Ito Y.,NS Tool Co.
International Journal of Automation Technology | Year: 2015

Micro milling tools made of Single Crystalline Diamond (SCD) have been developed to machine micro dies and molds made of ceramics. The milling tools of a cylindrical SCD having many sharp cutting edges are fabricated 3-dimensionally by scanning a laser beam. Flat shape of binder-less tungsten carbide mold was cut with the developed milling tool to evaluate the tool wears and its life. Some micro aspheric molds of tungsten carbide were cut with the milling tool at a rotational speed of 50,000 min−1. The ceramic molds were cut in the ductile mode. By cutting with the milling tool, the form accuracy obtained was about 100 nm P–V and the surface roughness 8 nm Rz. © 2014, Fuji Technology Press. All rights reserved.


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.


Naganumas K.,NS Tool Co. | Mori M.,NS Tool Co.
International Journal of Automation Technology | Year: 2012

Molding technology is one way of producing the micro-precision parts required by various industries. To Advance this molding technology, various elemental technologies related to materials, construction and machining methods are evolving together. One of these elemental technologies is milling by end mill. Further research and development of end mill is underway in response to improvement and requirement of molding technologies. There are various demands for end mills such as improvement of tool life and stable machining quality. Here we report the small diameter cBN end mill, developed as a tool to provide with stable machining accuracy with long tool life for high hard materials. We report the investigations and characteristics at the time of development and show the machining test.


Trademark
NS TOOL Co. | Date: 2011-10-14

Machine tools for metal working, glass manufacturing, stone working, plastic processing, lumbering, woodworking, veneer or plywood making; Machines and machine tools for the cutting and forming of materials; Cutting machines; Cutting tools, namely, end mills; Power tool parts, namely, collet chucks; Machine elements not for land vehicles, namely, spindles for metalworking machine tools and spindles for metal forming machines; Cutting tools for powered machines for cutting, shaping and finishing metals or other materials; Anticorrosive cemented carbide cutting tools; Anti-abrasive cemented carbide cutting tools; Cemented carbide tips; Diamond-pointed metal-cutting tools; Cemented carbide cutting tools; Wear-resistant metal-cutting tools for use in cutting, shaping and finishing metals; Cubic boron nitride cutting tools for use in cutting, shaping and finishing metals or other materials; High-pressure sintered cutting tools for use in cutting, shaping and finishing metals or other materials; Bits for power drills; Drilling heads being machine parts; Chucks for power drills; Parts, fittings, accessories and components for all the aforesaid goods, namely, holding devices for machine tools for metalworking machines and machines for cutting, shaping and finishing metals or other materials, namely, machine tool holders and collet holders, metal clamps used for holding piece parts on machine tables; sharpening wheels being parts of machines; tool holders being parts of machines.


Trademark
Ns Tool Co. | Date: 2016-06-27

Machine tools for metal working, glass manufacturing, stone working, plastic processing, lumbering, woodworking, veneer or plywood making; machines and machine tools for the cutting and forming of materials; cutting machines; cutting tools, namely, end mills; power tool parts, namely, collet chucks; machine elements not for land vehicles, namely, spindles for metalworking machine tools and spindles for metal forming machines; cutting tools for powered machines for cutting, shaping and finishing metals or other materials; anticorrosive cemented carbide cutting tools; anti-abrasive cemented carbide cutting tools; cemented carbide tips; diamond-pointed metal-cutting tools; cemented carbide cutting tools; wear-resistant metal-cutting tools for use in cutting, shaping and finishing metals; cubic boron nitride cutting tools for use in cutting, shaping and finishing metals or other materials; high-pressure sintered cutting tools for use in cutting, shaping and finishing metals or other materials; bits for power drills; drilling heads being machine parts; chucks for power drills; holding devices for machine tools for metalworking machines and machines for cutting, shaping and finishing metals or other materials, namely, machine tool holders and collet holders; sharpening wheels being parts of machines; tool holders being parts of machines.

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