B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 26/38 (2006.01)
Patent
CA 2478536
Disclosed is a perforating machining method based on the use of a laser beam for forming a weak portion for an air bag by boring a plurality of minute through-holes through a cover installed to an opening for the air bag as an automobile part, the method comprising the steps of: applying through-hole machining to the cover by radiating the laser beam toward a back surface of the cover; sensing the laser beam passed through the through-hole of the cover by means of a sensor to stop radiation of the laser beam on the basis of a detection signal derived from the sensor; and relatively displacing a laser beam-oscillating unit and the cover by a predetermined pitch to form the weak portion including the plurality of through-holes in accordance with a predetermined machining pattern, wherein: a part of the weak portion, which is disposed on a side of the back surface of the cover, is formed as a substantially linear groove, while a part of the weak portion, which is disposed on a side of a front surface of the cover, is formed by the plurality of through-holes separated from each other by a predetermined pitch.
Isogai Kazuo
Okumura Tokuji
Otake Tsuneo
Takekuma Hideshi
Wakabayashi Kazushiro
Honda Giken Kogyo Kabushiki Kaisha
Marks & Clerk
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