Drill feed mechanism of machine exclusively used for ejection hole drilling

Abstract

Abstract PURPOSE:To simplify the structure of an ejection hole drilling machine of the minimum diameter so as to perform step eed automatically and also realize easy detection of damages to a drill. CONSTITUTION:An ejection hole of an ejection nozzle 1 is drilled through rotation of a drill 2 tightly fitted in a spindle 3, which is equipped with a lever 8 pressed to the nozzle 1 side by means of a spring 9. Limit switches 13, 14 are provided respectively at positions of starting and completing cutting in the direction of movement of the lever to detect movement of the drill. A cylinder 10 provided in opposition to the spring 9 is moved by means of a selector valve 12. Then, the lever 8 is put in movement via a piston rod 11 and the drill 2 is mechanically fed through step feed.

Inventors

• 👤 Katsunori Arai
• 👤 新井　勝則

Bibliographic Details