Akira Hosokawa

Characteristics of High-Speed Milling of WC-Co Cemented Carbide Using Diamond-Coated Carbide End Mill

Kazuki Murooka, Tadashi AKEHI, Tomohiro KOYANO, Akira Hosokawa et autres

This study aims to improve the efficiency and precision of high-speed milling WC-Co based cemented carbide (WC-Co) using the chemical vapor deposition (CVD) diamond-coated carbide tools. Side cutting experiments are carried out to clarify the characteristics of high-speed milling WC-Co. At a …

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P1.25 - Change of piezoelectric signal generated in cancellous bone by ultrasound irradiation associated with oblique trabecular orientation

Akira Hosokawa

Formation mechanism of ultrafine grains at machined surface of 0.45 % carbon steel under high-speed turning process

Hyung‐Won Park, Masaki Matsuda, Kanji Ishitaka, Shinichi Funase et autres

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Improvement of Surface Quality of Electrochemical Machining Using Porous Electrode by Mixing Bubbles into Electrolyte

Tomohiro Koyano, Jin Yoshida, Tatsuaki FURUMOTO, Akira Hosokawa

In electrochemical machining using a porous electrode, the electrolyte flows through small pores. However, irregularities perpendicular to the direction of the electrolyte flow sometimes occur on the machined surface, resulting in high surface roughness. This is thought to be due to the …

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Finishing Speed Improvement Using Side Cover Plates in Gyro Finishing

Yôhei Hashimoto, Yugo Nakayama, Tatsuaki FURUMOTO, Akihito Sekiya et autres

Gyro finishing is a mass-finishing process in which fixed workpieces are finished by contact with the flow of abrasive media owing to the rotation of the barrel. The process is used to finish large complex-shaped workpieces, such as large gears and parts …

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Analytical Investigation of the Influence of Machining Area in Electrochemical Machining with Short Voltage Pulses

Tomohiro KOYANO, Yusuke Shibuya, Tatsuaki FURUMOTO, Akira Hosokawa

A coupled analysis of electric fields and a circuit equation analysis of the pulse-power supply circuit incorporating stray inductance was undertaken to determine the reason for not achieving machining with a short pulse duration with the increase in the machining area in …

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Improvement of Machining Accuracy by Controlling the Pulse Voltage On-time in Electrochemical Milling with High-speed Scanning

Tomohiro KOYANO, Shunta Notake, Tatsuaki FURUMOTO, Akira Hosokawa

Electrochemical milling has a drawback that the machining depth increases as the scanning speed decreases at the point where acceleration and deceleration occur. In this study, a method for controlling the pulse on-time of the pulse voltage according to the scanning speed …

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Turning characteristics of titanium alloy Ti-6Al-4V with high-pressure cutting fluid

Akira Hosokawa, Koki Kosugi, Takashi UEDA

This study investigates the effect of high-pressure cutting fluid on the turning characteristics of Ti-6Al-4V alloy. A noncoated carbide tool was used to measure the cutting temperature using a tool-work thermocouple technique, and the cutting characteristics were evaluated with respect to the …

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Miniaturization of Texture Size of One-process Surface Texturing by Electrochemical Machining

Tomohiro KOYANO, Katsunari TAKAHASHI, Akira Hosokawa, Tatsuaki FURUMOTO et autres

A new tool electrode for surface texturing by electrochemical machining is developed to minimize the size of the texture pattern. The processing parts and the electrolyte supply parts are made of thin plates, and they are laminated and assembled to make a …

Measurement of Wire Electrode Temperature in Wire Electrical Discharge Machining by Two-color Pyrometer with Optical Fiber

Tomohiro KOYANO, Eiji Goto, Akira Hosokawa, Tastuaki Furumoto et autres

In wire electrical discharge machining (EDM), increase of the wire temperature influences the wire breakage during machining because the increase of the temperature leads to the decrease in mechanical strength of the wire electrode. In this study, in order to measure the …

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Influence of metal transfer behavior under Ar and CO2 shielding gases on geometry and surface roughness of single and multilayer structures in GMAW-based wire arc additive manufacturing of mild steel

Mitsugu Yamaguchi, Rikiya Komata, Tatsuaki FURUMOTO, Satoshi Abe et autres

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Improving finishing efficiency using a cover plate in gyro finishing

Yôhei Hashimoto, Yugo Nakayama, Tatsuaki FURUMOTO, Akira Hosokawa

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