Patents by Inventor Ruotao LI

Ruotao LI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Piercing processing method and laser processing machine
    Patent number: 10328528
    Abstract: A piercing processing method and a laser processing machine capable of carrying out a piercing processing on a thick plate in short time are provided. It is a processing method for carrying out a piercing processing on a metallic material by laser beams with wavelengths in 1 ?m band, where the piercing processing is carried out by maintaining a range of 8?Zr/d?12 when a condensed beam diameter of the laser beams is set to be d and a Rayleigh length of the laser beams is set to be Zr. At that time, a focal position of the laser beams is set to be on a surface of a workpiece or an external of the workpiece. Then, a beam profile of the laser beams is such that the laser beams of a single mode are converted into a bowler hat shape by a beam quality tunable device.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: June 25, 2019
    Assignee: AMADA HOLDINGS CO., LTD.
    Inventors: Ruotao Li, Hiroaki Ishiguro
  • PIERCING PROCESSING METHOD AND LASER PROCESSING MACHINE
    Publication number: 20170297146
    Abstract: A piercing processing method and a laser processing machine capable of carrying out a piercing processing on a thick plate in short time are provided. It is a processing method for carrying out a piercing processing on a metallic material by laser beams with wavelengths in 1 ?m band, where the piercing processing is carried out by maintaining a range of 8?Zr/d?12 when a condensed beam diameter of the laser beams is set to be d and a Rayleigh length of the laser beams is set to be Zr. At that time, a focal position of the laser beams is set to be on a surface of a workpiece or an external of the workpiece. Then, a beam profile of the laser beams is such that the laser beams of a single mode are converted into a bowler hat shape by a beam quality tunable device.
    Type: Application
    Filed: September 9, 2015
    Publication date: October 19, 2017
    Applicant: AMADA HOLDINGS CO., LTD.
    Inventors: Ruotao LI, Hiroaki ISHIGURO