The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 1997
Filed:
Feb. 23, 1995
Shigehiro Yoshiyasu, Aichi, JP;
Masaru Kanaoka, Aichi, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A laser cutting method is provided for laser cutting a workpiece made of a metallic material to form hole having a desired shape, in which many of a second set of laser cutting conditions are different from a set of first laser cutting conditions, in order to avoid a chipping phenomenon when switching laser cutting conditions. The first laser cutting conditions are used for cutting the workpiece up to a predetermined distance short of the end point of the cut. The second set of cutting conditions are used for cutting the workpiece between an end point of the cut along the circumference of the hole, and a point a predetermined distance short of the end point of the cut. The focus position in the second laser cutting conditions is the same as the focus position in the first laser cutting conditions. Moreover, other of the second cutting conditions are the same as corresponding ones of the first set of cutting conditions.