Title:
ABNORMALITY JUDGING DEVICE FOR DRILL
Document Type and Number:
Japanese Patent JP3676568
Kind Code:
B
Abstract:
PROBLEM TO BE SOLVED: To securely judge the breakage of a drill and clinging of cutting chips with a simple structure.
SOLUTION: An air jetting port 3 and a pressure detecting port 4 are provided so as to be opposed with each other on each side of a drill D which moves ahead or back in the direction of an axis L while being held by a chuck C of a processing device. The air jetting port 3 is supplied with high pressure air from an air supply 5, and a pressure at the pressure detecting port 4 is detected by pressure detecting means 12. When the drill D after completing processing moves back from a work W, if the pressure detected by the pressure detecting means 12 is in the range of 0.01 to 0.04 kgf/cm2, it is judged that the drill D is in a normal condition; if the detected pressure is 0.04 kgf/cm2 or more, it is judged that the drill D is broken; or if the detected pressure is 0.01 kgf/cm2 or less, it is judged that clinging of cutting powder occurs on the drill D.
Inventors:
Sasao, Narimitsu
Application Number:
JP1998000112332
Publication Date:
May 13, 2005
Filing Date:
April 22, 1998
Export Citation:
Assignee:
HONDA MOTOR CO LTD
International Classes:
B23Q17/09; B23B49/00; B23Q17/09; B23B49/00; (IPC1-7): B23B49/00; B23Q17/09