Research Themes
Micro EDM |
Micro Cutting |
Micro Grinding |
Micro USM |
Micro ECM |
Micro Shearing |
Hybrid Micromachining
Micro Shearing
Dieless Punching of Ultrasmall-Diameter Holes
The dieless punching of ultrasmall-diameter holes was attempted because it is difficult to punch such holes by conventional punching methods. As a result, a hole with a diameter smaller than 6 µm was punched in a 3 µm-thick stainless-steel sheet.
Paper Paper (KIT only) (Precision Engineering, Vol.78, 2022, pp.114-123)
Punched hole (entrance)
Punched hole (exit)
Dieless Blanking using Noncylindrical Micropunches
Piercing holes using noncylindrical micropunches was attempted by dieless blanking. Square and semicircular microholes were successfully pierced in a stainless-steel sheet.
Paper Paper (KIT only) (Precision Engineering, Vol.83, 2023, pp.250-261)
Square microhole
Semicircular microhole
Examination of Backing Material and Punch Shape in Dieless Punching of Microholes
In the dieless punching of microholes, the backing material was changed from adhesive tape to a sticky note. Additionally, a stepped punch with a shorter straight section was employed. As a result, a microhole with a diameter of less than 4 µm was successfully punched.
Paper (Procedia CIRP, Vol.137, 2025, pp.13-18)
Microhole less than 4 µm in diameter
Development of Micro-Nibbling Method Based on Dieless Punching
The feasibility of micro-nibbling using dieless punching was demonstrated. As a result, microslits with widths down to 5 µm, as well as a variety of micro-shaped cutouts, were successfully fabricated.
Paper (Precision Engineering, Vol.97, 2026, pp.953-960)
5 µm-wide microslit
Cut-out sector-shaped piece