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:
Feb. 17, 2004
Filed:
Apr. 26, 2002
Akira Furujo, Tokyo, JP;
Hisahito Inagawa, Tokyo, JP;
Koike Sanso Kogyo Co., Ltd., Tokyo, JP;
Abstract
It is an object of this invention to provide a laser piercing method capable of reducing the time required for piercing a workpiece and satisfactorily forming a pierced hole. This invention provides a laser piercing method, in which a piercing process is performed by setting the level of a nozzle during piercing execution to a value higher than the level of the nozzle during cutting execution, setting the pressure of the assist gas during piercing execution to a value higher than the pressure of the assist gas during cutting execution, and setting the level of a focal point O of the laser beam during piercing execution lower than the level of a focal point O of the laser beam during cutting execution and subsequent to the piercing process a cutting process for cutting a workpiece is performed by setting the level of the nozzle the pressure of the assist gas, and the level of the focal point O of the laser beam to a value prescribed for cutting execution, respectively.