Piercing processing method and laser processing machine
US10328528B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2015 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Sep 9, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/0648
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
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 μm 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.