Method of inspection for laser working

Abstract

Abstract PURPOSE:To obtain good quality of working by detecting the amplitude of sound of working generated at the time of laser beam irradiation and thereby judging the quality of condition of working of a material to be worked. CONSTITUTION:A laser beam 2 oscillated from a laser oscillator 1 is changed its direction by a total reflecting mirror and passed through a condenser 4 to weld a material to be worked 5. Sound of working generated under an optimum state is stored in a memory circuit 13, and this memory signal and amplitude of sound of working 6 converted into electric signals are compared in a comparator circuit 14. If the difference of amplitude is within a specified limit, a signal that indicates good welding condition is displayed on a display device 15, and if it is not acceptable, a signal indicating bad is shown on the device 15. Accordingly, when a signal of bad is displayed during working, laser output, the distance between the condenser 4 and the material 5, etc. are controlled to obtained good quality of working.

Inventors

• 👤 Minoru Kobayashi
• 👤 実 小林
• 👤 Megumi Omine
• 👤 大「峰」　恩
• 👤 Yoshio Yamane
• 👤 山根　義雄

Bibliographic Details