Student written Research Laboratory Guidebook 2023Nagaoka University of Technology

Prev Next

Precision Machining and Mechanism Laboratory

Professor / Hiromi ISOBE  Associate Professor / Keisuke HARA

ProfessorHiromi ISOBE

profiles and activiities profiles and activiities at nagaoka university of technology

Associate ProfessorKeisuke HARA

  • Machining using ultrasinic vibration
  • Observe internal stress in glass material
  • Subtle machining with invisible force


Professor / Hiromi ISOBE
He is a tough teacher, but he will guide us kindly when we face challenges. He is a National Institute of Technology and NUT's OB, so he understands our hobbies and actions.

Research Content

■Development of technology to photograph a machining phenomenon. There are many unknown points in a machining phenomenon in the ultrasonic band. Therefore, we elucidate a machining phenomenon by high-speed visualization technique of internal stress. ■Application to small diameter drilling technology The small-diameter-drill has low rigidity. The rotating drill superimposed with axial ultrasonic vibration motion reduces machining resistance and improves the machined surface and tool life. ■Creation of surface texture Lathe processing using ultrasonic vibration creates micro texture on the surface. Textures have the effect of improving the wear characteristics.

Image of "photoelastic method"

A Day in the Lab

Reserch is conducted by a team of two or three members. The morning of student begins by sending an email with the reserch plan of the day to teacher. There is a core time from 8:00 to 17:00. We have a seminar every morning, and students report their achievements once a week. Jigs and parts of equipment necessary for experiments need to be designed, analyzed and manufactured by yourself. New students can develop their abilities with the guidance of teachers and seniors.

Laboratory driniking party

Thesis Subjects

  • (M)Study on cutting mechanism under ultrasonic vibration cutting by visualization of internal stress of workpiece
  • (M)Consideration of ultrasonic vibration-assisted drilling using stress visualization method by two-direction imaging
  • (M)Evaluation of starting friction of the surface texture generarted by ultrasonic vibration cutting

The number of
PhD Graduates


Major employers of Graduates

  • Makino Milling Machine Co.,Ltd.
  • DMG MORI Co.,Ltd.
  • ADTEC Engineering Co.,Ltd.
  • Honda Motor Co.,Ltd.
  • Canon
  • GS Yuasa Corporation
Writer : Kota TAKASHIMA, Science of Technology Innovation
(National Institute of Technology, Nagaoka College)