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US 10,300,559 B2Granted
Laser drilling method and apparatus with radiation output changes in a radial direction during drilling of a workpiece
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMitsutaka Yoshida, Natsuki Sugiyama, Akio Sato, Kenji Kidera, Masaru Setodoi, Taku Yamaguchi
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Abstract
A laser drilling method is a laser drilling method for performing drilling on a workpiece by use of a laser beam. The laser drilling method includes, after machining a through hole by radiating the laser beam to the workpiece (S100), scanning with the laser beam centered around the through hole toward a radial direction while changing a radiation output of the laser beam (S200).
Claims5
A laser drilling method for performing drilling on a workpiece by use of a laser beam, the laser drilling method comprising:
- machining a through hole in the workpiece by radiating the laser beam to the workpiece such that the through hole extends from a bottom surface of the workpiece to a top surface of the workpiece;
- and
- scanning with the laser beam centered from the through hole toward a radial direction while changing a radiation output of the laser beam to form a hole within the workpiece between the bottom surface and the top surface,
- wherein a diameter of the hole changes between the bottom surface and the top surface such that the diameter increases from a lower end of the hole to an upper end of the hole,
- wherein the radiation output of the laser beam is changed to be smaller while scanning with the laser beam in the radial direction from the lower end of the hole to the upper end of the hole.
2 more elements
Dependencies are inferred from the claim text.